CN117964276B - Low-carbon concrete additive and preparation method and application thereof - Google Patents
Low-carbon concrete additive and preparation method and application thereof Download PDFInfo
- Publication number
- CN117964276B CN117964276B CN202410386171.6A CN202410386171A CN117964276B CN 117964276 B CN117964276 B CN 117964276B CN 202410386171 A CN202410386171 A CN 202410386171A CN 117964276 B CN117964276 B CN 117964276B
- Authority
- CN
- China
- Prior art keywords
- parts
- component
- concrete
- water
- curing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 212
- 239000000654 additive Substances 0.000 title claims abstract description 64
- 230000000996 additive effect Effects 0.000 title claims abstract description 63
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000000843 powder Substances 0.000 claims abstract description 51
- 239000000463 material Substances 0.000 claims abstract description 48
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims abstract description 42
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 36
- 238000002156 mixing Methods 0.000 claims abstract description 34
- 239000010881 fly ash Substances 0.000 claims abstract description 30
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000003756 stirring Methods 0.000 claims abstract description 25
- 229920000056 polyoxyethylene ether Polymers 0.000 claims abstract description 23
- 229940051841 polyoxyethylene ether Drugs 0.000 claims abstract description 23
- 238000000227 grinding Methods 0.000 claims abstract description 20
- 239000002893 slag Substances 0.000 claims abstract description 20
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910021534 tricalcium silicate Inorganic materials 0.000 claims abstract description 19
- 235000019976 tricalcium silicate Nutrition 0.000 claims abstract description 19
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 18
- -1 diallyl alcohol Chemical compound 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 7
- 239000004568 cement Substances 0.000 abstract description 52
- 230000000052 comparative effect Effects 0.000 description 20
- 239000002904 solvent Substances 0.000 description 14
- 229910052500 inorganic mineral Inorganic materials 0.000 description 12
- 239000011707 mineral Substances 0.000 description 12
- 238000012360 testing method Methods 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 9
- 239000004576 sand Substances 0.000 description 9
- 239000004575 stone Substances 0.000 description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 8
- 238000001035 drying Methods 0.000 description 8
- 238000009472 formulation Methods 0.000 description 8
- 239000003999 initiator Substances 0.000 description 8
- 238000005303 weighing Methods 0.000 description 8
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 7
- PYGSKMBEVAICCR-UHFFFAOYSA-N hexa-1,5-diene Chemical group C=CCCC=C PYGSKMBEVAICCR-UHFFFAOYSA-N 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 description 4
- 239000000499 gel Substances 0.000 description 4
- 238000006703 hydration reaction Methods 0.000 description 4
- 238000002329 infrared spectrum Methods 0.000 description 4
- 239000004721 Polyphenylene oxide Substances 0.000 description 3
- 238000003763 carbonization Methods 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 229910021645 metal ion Inorganic materials 0.000 description 3
- 229920000570 polyether Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000013081 microcrystal Substances 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920005646 polycarboxylate Polymers 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000003487 anti-permeability effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 239000011363 dried mixture Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000008030 superplasticizer Substances 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The application provides a low-carbon concrete additive, which comprises a component A and a component B, wherein the component A comprises, by weight, 25-35 parts of tricalcium silicate, 15-25 parts of slag powder, 10-20 parts of fly ash, 1-2 parts of sodium carbonate and 20-30 parts of water, and grinding into ultrafine powder after fully mixing and curing; the component B comprises the following components of uniformly mixing, by weight, 80-120 parts of hydroxyethyl acrylate, 0.10-0.20 part of dicumyl peroxide, 8-12 parts of diallyl alcohol end-capped polyoxyethylene ether and 180-220 parts of water/acetone (1:1, w/w) solution, and stirring to obtain a solution. The concrete additive provided by the application can effectively reduce the cement dosage in concrete, and maintain the strength and durability of the prepared concrete material.
Description
Technical Field
The application relates to the technical field of concrete, in particular to a low-carbon concrete additive, a preparation method and application thereof.
Background
Cement concrete is currently the most dominant building material, but its production process generates large amounts of carbon dioxide. Currently, methods for reducing the amount of concrete cement include increasing the amount of mineral admixture, increasing the amount of water reducer, and the like.
However, the amount of cement used affects the strength of the concrete and the performance and cost of the concrete, so that the carbon emission is reduced, the performance and cost of the concrete are not affected, and the conventional scheme is difficult to achieve the purposes at the same time. In order to solve the problem, the invention provides an additive for low-carbon concrete, and a preparation method and application thereof. According to the scheme provided by the invention, on the basis of considering the cost of the concrete, the emission of carbon dioxide of the concrete is reduced, and the strength of the concrete is ensured.
Disclosure of Invention
The application aims to provide a low-carbon concrete additive, a preparation method and application thereof, so as to solve at least one technical problem. The application achieves the above object by the following technical scheme.
In a first aspect, an embodiment of the application provides a low-carbon concrete additive, which comprises a component A and a component B, wherein the component A comprises, by weight, 25-35 parts of tricalcium silicate, 15-25 parts of slag powder, 10-20 parts of fly ash, 1-2 parts of sodium carbonate and 20-30 parts of water, and grinding into ultrafine powder after fully mixing and curing; the component B comprises the following components of uniformly mixing, by weight, 80-120 parts of hydroxyethyl acrylate, 0.10-0.20 part of dicumyl peroxide, 8-12 parts of diallyl alcohol end-capped polyoxyethylene ether and 180-220 parts of water/acetone (1:1, w/w) solution, and stirring to obtain a solution.
The low-carbon concrete additive can effectively reduce the consumption of cement in concrete, the reduction range of the consumption of cement can be up to 50%, and the material cost required by manufacturing the concrete is reduced; and the properties of the concrete added with the low-carbon concrete additive are equal to or better than those of common concrete, the concrete shows excellent durability, and the carbonization resistance and sulfate erosion resistance are improved in multiple times compared with the common concrete, so that the service life of the concrete is prolonged.
In some embodiments, the curing comprises curing at 70-80 ℃ ± 5 ℃ with a humidity of 95% or more for 36-60 hours.
In some embodiments, after the curing, the cured mix is completely dried at 70-90 ℃ prior to the grinding.
In some embodiments, the Bosch specific surface area of component A is above 600m 2/kg. In a preferred embodiment, the Bosch specific surface area of component A is in the range from 600 to 1000m 2/kg.
In some embodiments, the stirring is performed at 65-75 ℃ for 4-6 hours.
In some embodiments, the molecular weight of the bis-allyl alcohol-terminated polyoxyethylene ether is from 1000 to 1400.
In some embodiments, the weight ratio of the component a to the component B in the low carbon concrete additive is between 3:1 and 1:3. Thus, a larger reduction in cement usage can be obtained, and the resulting concrete material has better strength and durability.
In a second aspect, the embodiment of the application provides a preparation method of a low-carbon concrete additive, which comprises the steps of fully mixing and curing 25-35 parts by weight of tricalcium silicate, 15-25 parts by weight of slag powder, 10-20 parts by weight of fly ash, 1-2 parts by weight of sodium carbonate and 20-30 parts by weight of water, and grinding into superfine powder to obtain a component A; 80-120 parts of hydroxyethyl acrylate, 0.10-0.20 part of dicumyl peroxide and 8-12 parts of diallyl alcohol end-capped polyoxyethylene ether are added into 180-220 parts of water/acetone (1:1, w/w) solution, and the mixture is uniformly mixed and stirred to obtain the component B. The preparation method of the concrete additive provided by the application is simple to operate, low in cost and easy for industrial production.
In some embodiments, the curing comprises curing at 70-80 ℃ ± 5 ℃ with a humidity of 95% or more for 36-60 hours.
In some embodiments, the ultra-fine powder has a Bosch specific surface area of 600m 2/kg or more. In a preferred embodiment, the Bosch specific surface area of component A is in the range from 600 to 1000m 2/kg.
In some embodiments, the stirring is performed at 65-75 ℃ for 4-6 hours.
In a third aspect, an embodiment of the present application provides a low-carbon concrete, including the concrete additive and the cementing material according to the first aspect, wherein the component a and the component B in the concrete additive each account for 0.25-1.5% of the total weight of the cementing material. The concrete provided by the application effectively reduces the consumption of cement, the reduction range can reach 50%, and various properties of the concrete are the same as or better than those of other common concrete, in particular the durability of the concrete is effectively improved.
In a fourth aspect, an embodiment of the present application provides a method for preparing low-carbon concrete, including uniformly mixing the component a and the component B of the concrete additive of the first aspect, adding the mixed concrete additive into a concrete raw material, and uniformly stirring. The preparation method of the concrete is simple to operate, and the prepared concrete material effectively reduces the cement consumption and has good mechanical property and durability.
The application provides the low-carbon concrete additive which comprises the component A obtained by fully mixing and curing tricalcium silicate, slag powder, fly ash, sodium carbonate and water, grinding the superfine powder, and the solution of adding hydroxyethyl acrylate, dicumyl peroxide and diallyl end-capped polyoxyethylene ether into water/acetone (1:1, w/w), wherein the low-carbon concrete additive of the solution component B obtained after stirring can effectively reduce the consumption of cement in the preparation of concrete, effectively reduce the carbon emission in the concrete, and has all properties similar to or better than those of common concrete, in particular good durability, carbonization resistance and sulfate erosion resistance.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a scanning electron microscope image of component a according to one embodiment of the application.
Fig. 2 is an infrared spectrum of component B according to one embodiment of the application.
Detailed Description
In order to make the present application better understood by those skilled in the art, the following description will clearly and completely describe the technical solutions in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The endpoints and any values of the ranges disclosed herein are not limited to the precise range or value, and are understood to encompass values approaching those ranges or values. For numerical ranges, one or more new numerical ranges may be found between the endpoints of each range, between the endpoint of each range and the individual point value, and between the individual point value, in combination with each other, and are to be considered as specifically disclosed herein.
The amount of cement affects the strength and other properties of concrete, and the amount of cement affects the cost of concrete production, and in order to reduce carbon emissions in the concrete production process, a method of reducing the amount of concrete is generally adopted, but in the prior art, while reducing the amount of cement, it is difficult to ensure that the performance and cost of concrete are not affected.
For this purpose, the first aspect of the application provides a low-carbon concrete additive comprising a component A and a component B, wherein the component A comprises superfine powder obtained by sufficiently mixing tricalcium silicate, slag powder, fly ash, sodium carbonate and water, curing and grinding; the component B comprises a solution obtained by adding water/acetone (1:1, w/w) into hydroxyethyl acrylate, dicumyl peroxide and diallyl alcohol end-capped polyoxyethylene ether, uniformly mixing, and stirring.
The carboxyl and double bond in the concrete additive can form stable complex with calcium, magnesium, iron and other metal ions in water, so that the complex can continuously participate in various hydration reactions in the concrete, and crystallization is reduced to form a stable product. The carboxyl and double bonds in the component B can form a negative adsorption layer on the surface of the concrete, so that electrostatic repulsive force is generated between the carboxyl and double bonds and positively charged metal ions in water, the carboxyl and double bonds are prevented from approaching the surface of the concrete, and the impermeability and durability of the concrete are improved. In addition, the carboxyl and double bond in the component B can form a layer of protective film on the surface of the concrete, so that the contact of the concrete with water, air, acid and alkali and the like is reduced, the corrosion rate of the concrete is reduced, and the corrosion resistance of the concrete is improved.
The low-carbon concrete additive provided by the application can effectively reduce the consumption of cement in concrete, the reduction range can reach 50%, and the prepared concrete has the same or better performances than the common concrete, and especially the durability of the concrete is effectively improved, and the carbonization resistance and sulfate erosion resistance of the concrete are improved. The low-carbon concrete additive can effectively reduce the cost in the concrete manufacturing process because the cement consumption is greatly reduced and the obtained concrete has better performance. In addition, the cement consumption is reduced, and the consumption of other light-colored materials such as mineral powder is improved, so that the overall color of the concrete is lighter and more attractive.
In some embodiments, component A comprises grinding into ultrafine powder after fully mixing and curing 25-35 parts by weight of tricalcium silicate, 15-25 parts by weight of slag powder, 10-20 parts by weight of fly ash, 1-2 parts by weight of sodium carbonate and 20-30 parts by weight of water. The three processes of gel production by hydration of tricalcium silicate, calcium hydroxide, sodium carbonate and calcium hydroxide, sodium hydroxide and calcium carbonate, and N-A-S-H gel production by reaction of sodium hydroxide, slag powder and fly ash form three solid matters of C-A-S-H, N-A-S-H and calcium carbonate, so that the three solid matters can be used as crystal seeds for hydration of cementing materials such as cement in concrete, and the like, play A microcrystalline core effect in the concrete, and effectively improve the strength of the concrete. The amount of the individual raw materials in component a may vary within a certain range.
The amount of each raw material of the component a is set within the above range, so that the strength of the concrete can be effectively improved. Illustratively, the weight parts of tricalcium silicate may be 25, 28, 30, 32, 35, etc., or any value in the range of values. The parts by weight of the slag powder may be 15, 18, 20, 23, 25, etc. parts by weight, or any value in the range between the values. The weight parts of fly ash may be 10, 12, 15, 18, 20, etc. or any number within the range. The weight parts of calcium carbonate may be 1, 1.5, 2, etc. or any value between the ranges consisting of any number.
In some embodiments, curing in component A comprises curing at 70-80 ℃ + -5 ℃ with a humidity above 95% for 36-60 hours. The curing time of component a may vary within a certain range. When the curing in the component A is performed for 36-60 hours under the above conditions, the reaction between the raw materials in the component A can be fully performed to form sufficient microcrystal nuclei, so that the method is beneficial to the subsequent application in concrete production to enhance the strength of concrete.
In some embodiments, after the curing, the cured mix is completely dried at 70-90 ℃ prior to the grinding.
Grinding the dried mixture into superfine powder to obtain the component A. In some embodiments, the Bosch specific surface area of component A is 600m 2/kg or more. The higher fineness also enables the substances to play a role of micro aggregate, and the strength of the concrete can be obviously improved. In a preferred embodiment, the Bosch specific surface area of component A is in the range of 600m 2/kg-1000m2/kg. Illustratively, the Bosch specific surface area of component A may be a value between the range of 600m2/kg、650m2/kg、700m2/kg、800m2/kg、850m2/kg、900m2/kg、950m2/kg, or any number.
In some embodiments, component B comprises a solution obtained by uniformly mixing, in parts by weight, 80-120 parts of hydroxyethyl acrylate, 0.10-0.20 part of dicumyl peroxide, 8-12 parts of bis-allyl alcohol-terminated polyoxyethylene ether, and 180-220 parts of water/acetone (1:1, w/w) solution, and stirring the mixture.
The polyether monomer in the component B is an analogue of a high-performance polycarboxylate water reducer, and can improve the fluidity and strength of the concrete, so that the consumption of cement and cementing materials in the concrete is reduced. The polyether with double end caps can randomly form a certain amount of closed annular molecules in the polymerization process, and the nanoscale polyether rings can realize cross-linking to form a reticular structure, so that cement particles are fully dispersed in a three-dimensional space, and the one-dimensional and two-dimensional dispersion capacity of the traditional polycarboxylate superplasticizer is exceeded, and the strength and durability of concrete are improved. The method is characterized in that a large number of anchor sheet-shaped and fibrous C-S-H gels are crossly climbed in a net structure, so that originally dispersed cement particles and hydration products thereof are connected to form a firmly-combined compact whole, and finally, the cement strength is enhanced after the cement is hardened.
The amount of each raw material in the component B is set within the above range, so that sufficient carboxyl groups and double bonds can be provided, and the component A can be used together to effectively improve the impermeability and durability and corrosion resistance of the concrete. Illustratively, the parts by weight of hydroxyethyl acrylate may be 80, 90, 100, 110, 120, etc. parts by weight, or a value between any number of ranges. The parts by weight of the bisallyl alcohol-terminated polyoxyethylene ether may be 8, 9, 10, 11, 12, etc., or a value ranging between any number.
In some embodiments, the stirring is performed at 65-75 ℃ for 4-6 hours.
In some embodiments, the molecular weight of the bis-allyl alcohol-terminated polyoxyethylene ether is from 1000 to 1400. Illustratively, the molecular weight of the bis-allyl alcohol-terminated polyoxyethylene ether can be 1000, 1100, 1200, 1300, 1400, etc., or a range of values between any number. In a preferred embodiment, the molecular weight of the bis-allyl alcohol-terminated polyoxyethylene ether is 1200.
In some embodiments, the weight ratio of the component a to the component B in the low carbon concrete additive is between 3:1 and 1:3. The proportion of the components A and B is within the above range, and the concrete additive can achieve the effects of proper dispersion and strength enhancement. Thus, a larger reduction in cement usage can be obtained, and the resulting concrete material has better strength and durability.
The second aspect of the application also provides a preparation method of the low-carbon concrete additive, which comprises the steps of fully mixing 25-35 parts of tricalcium silicate, 15-25 parts of slag powder, 10-20 parts of fly ash, 1-2 parts of sodium carbonate and 20-30 parts of water, curing, and grinding into superfine powder to obtain a component A; 80-120 parts of hydroxyethyl acrylate, 0.10-0.20 part of dicumyl peroxide and 8-12 parts of diallyl alcohol end-capped polyoxyethylene ether are added into 500g of water/acetone (1:1, w/w) solution, and the mixture is uniformly mixed and stirred to obtain the component B. The preparation method of the concrete additive provided by the application is simple to operate, low in cost and easy for industrial production.
In some embodiments, the curing comprises curing at 70-80 ℃ ± 5 ℃ with a humidity of 95% or more for 36-60 hours.
In some embodiments, the ultra-fine powder has a Bosch specific surface area of 600m 2/kg or more. In a preferred embodiment, the Bosch specific surface area of component A is in the range from 600 to 1000m 2/kg. Illustratively, the Bosch specific surface area of component A may be a value between the range of 600m2/kg、650m2/kg、700m2/kg、800m2/kg、850m2/kg、900m2/kg、950m2/kg, or any number.
In some embodiments, the stirring is performed at 65-75 ℃ for 4-6 hours.
According to a third aspect of the application, there is provided a low carbon concrete comprising the concrete additive of the first aspect and a cementitious material, wherein the components A and B in the concrete additive each comprise 0.25 to 1.5% by weight of the cementitious material. When the contents of the component A and the component B in the concrete additive are within the above ranges, it is helpful to reduce the cement amount and increase the strength while taking into account the preparation cost of the concrete. By arranging the concrete additive in the range, the consumption of cement in the preparation of the concrete material can be effectively reduced, the reduction range of the consumption of the cement can be up to 50%, and the obtained concrete has various properties which are the same as or better than those of other common concrete, and especially the durability of the concrete is effectively improved.
In the application, the cementing material is a substance which can be changed into a firm stone-like body from slurry under the physical and chemical actions, can be used for cementing other materials and has certain mechanical strength. For example, the cementitious material may include cement, fly ash, mineral fines, and the like.
In a fourth aspect, an embodiment of the present application provides a method for preparing low-carbon concrete, including uniformly mixing the component a and the component B of the concrete additive of the first aspect, adding the mixed concrete additive into a concrete raw material, and uniformly stirring. The preparation method of the concrete is simple to operate, and the prepared concrete material effectively reduces the cement consumption and has good mechanical property and durability.
The application will be further illustrated with reference to specific examples.
Examples
It is to be understood that the following examples are illustrative only and are not to be construed as limiting the application. The specific techniques and conditions not identified in the examples are according to the techniques or conditions described in the literature in this field or according to the product specifications. The reagents or apparatus used were conventional products available commercially without the manufacturer's knowledge.
The cements, fly ash, mineral powder, sand, crushed stone used in the following examples were all from the company longsand city, tianshui concrete, ltd. The additive is a high-efficiency water reducer of the dulcimer plate polycarboxylic acid series concrete.
The instrument and equipment are all the test instruments which accord with the relevant national standard of concrete, and comprise:
DYE-2000 electrohydraulic pressure testing machine, ten thousand test machine manufacturing (Hebei) Limited.
YH-90B standard constant temperature and humidity curing box, hebei Huahua Instrument and Equipment Co., ltd.
HJW-30 concrete single-shaft horizontal forced mixer, hebei Star blue building instruments Co., ltd.
Compressive strength testing at each age: measuring the compressive strength of each group of concrete at each age according to GB/T50081-2019 Standard of test method for physical and mechanical properties of concrete;
Concrete durability test: the durability of the concrete was measured according to GB/T50082-2016 Standard for test methods for Long-term Performance and durability of ordinary concrete.
Preparation example 1
Preparation of concrete additives
Preparation of component A: mixing 30 parts of tricalcium silicate, 20 parts of slag powder, 15 parts of fly ash, 1.5 parts of sodium carbonate and 25 parts of water, and curing for 48 hours at 75+/-5 ℃ with humidity of more than 95%; then completely drying at 80 ℃, and grinding into ultrafine powder with the Bosch specific surface area of more than 600m 2/kg by using a ball mill to obtain a component A;
Preparation of component B: 100 parts of hydroxyethyl acrylate, 0.15 part of dicumyl peroxide (DCP) as an initiator, 10 parts of diallyl alcohol-terminated polyoxyethylene ether (with a molecular weight of 1200) as a solvent and 500g of water/acetone (1:1, w:w) as a solvent are added into a three-neck flask, and uniformly stirred for 4 hours at 70 ℃ to obtain a component B.
The component A thus obtained was examined by a Scanning Electron Microscope (SEM), and a scanning electron microscope image was obtained, as shown in FIG. 1. As can be seen from fig. 1, various gels are mixed and wrapped with calcium carbonate crystal grains, and the original tricalcium silicate, fly ash, slag powder and sodium carbonate are completely reacted, and the crystals are not seen under SEM.
The infrared spectrum of the component B prepared above was detected to obtain an infrared spectrum, which is shown in FIG. 2. As shown in the analysis of FIG. 2, the main functional groups of the diallyl alcohol end-capped polyoxyethylene ether and the hydroxyethyl acrylate are reserved in the component B, and the absorption peak of the carbon-carbon double bond in the infrared spectrum is weak, which indicates that most unsaturated bonds have undergone polymerization reaction, and the carboxyl group and the double bond of the component B can form stable complexes with metal ions such as calcium, magnesium, iron and the like in water, thereby being beneficial to the formation of microcrystal nuclei and further improving the strength and the durability of the concrete prepared subsequently. In addition, a small amount of carbon-carbon double bonds are reserved in the component B and do not react, and a negative charge protective layer can be formed on the surface of the concrete, so that the impermeability, corrosion resistance and durability of the concrete material prepared subsequently can be improved.
Example 1
Preparation of concrete: according to the mixing ratio in the following table 1, the component a and the component B prepared in the above preparation example 1 are firstly respectively taken and mixed uniformly, the pre-mixed concrete material is added in 30min, and the mixture is finally stirred uniformly (stirring is not less than 60 s) in a concrete mixer to obtain the concrete mixture. The pre-mixed concrete material is prepared by weighing and mixing sand, broken stone, cement, fly ash and mineral powder according to a certain proportion, adding additive and water, and stirring for 60s by using a concrete stirrer.
Examples 2 to 3
Concrete materials were prepared using the concrete preparation method of example 1 in the amounts of the formulations shown in table 1 below.
Comparative examples 1 to 2
Concrete materials were prepared using the concrete preparation method of example 1 according to the amounts of the formulations in table 1 below, with the difference from example 1 in the amounts of cement and without the addition of the concrete additive of the present application. Among them, comparative example 1 is a conventional concrete with a C30 symbol.
Comparative example 3
The concrete materials were prepared using the concrete preparation method of example 1 according to the amounts of the formulations in table 1 below, differing from example 1 in that only component a of the concrete additive of the present application was added, and component B was not added.
Comparative example 4
The concrete materials were prepared using the concrete preparation method of example 1 according to the amounts of the formulations in table 1 below, differing from example 1 in that only component B of the concrete additive of the present application was added, and component a was not added.
Table 1 formulation for preparing concrete (material dosage unit is kg/m 3)
The concretes prepared in examples 1 to 3 and comparative examples 1 to 4 above were subjected to compressive strength test at each age and concrete durability test. The test results are shown in Table 2, where the intensity units are in megapascals. Wherein the cement reduction was calculated as the reduction in cement amount from each group relative to the cement amount in comparative example 1, cement reduction rate= (cement amount of comparative example 1-cement amount)/cement amount of comparative example 1 ×100%, and the higher the level number of the sulfate corrosion resistance level and the permeation resistance level, the better the performance.
TABLE 2
From the above test results, it is known that the strength, sulfate corrosion resistance and anti-permeability of the concrete material prepared by adding the concrete additive of the present application are superior to those of the comparative examples.
Examples 4 to 5
Concrete materials were prepared using the concrete preparation method of example 1 in the amounts of the formulations shown in table 3 below.
Example 6
Preparation of concrete additive:
preparation of component A: mixing 30 parts of tricalcium silicate, 20 parts of slag powder, 15 parts of fly ash, 1.5 parts of sodium carbonate and 25 parts of water, and curing for 48 hours at 75+/-5 ℃ with humidity of more than 95%; then completely drying at 80 ℃, and grinding into ultrafine powder with the Bosch specific surface area of more than 600m 2/kg by using a ball mill to obtain a component A;
Preparation of component B: 81 parts of hydroxyethyl acrylate, 0.15 part of dicumyl peroxide (DCP) as an initiator, 10 parts of diallyl alcohol-terminated polyoxyethylene ether (with a molecular weight of 1200) as a solvent and 500g of water/acetone (1:1, w:w) as a solvent are added into a three-neck flask, and uniformly stirred for 4 hours at 70 ℃ to obtain a component B.
Preparation of concrete:
according to the dosage of the formula shown in the following table 3, the components A and B prepared above are firstly respectively and uniformly mixed, the pre-mixed concrete material is added within 30min, and the mixture is finally and uniformly mixed (stirred for at least 60 s) in a concrete mixer to obtain the concrete mixture. The pre-mixed concrete material is prepared by weighing and mixing sand, broken stone, cement, fly ash and mineral powder according to a certain proportion, adding additive and water, and stirring for 60s by using a concrete stirrer.
Example 7
Preparation of concrete additive:
Preparation of component A: mixing 30 parts of tricalcium silicate, 20 parts of slag powder, 15 parts of fly ash, 1 part of sodium carbonate and 25 parts of water fully, and curing for 48 hours at 75+/-5 ℃ with humidity of more than 95%; then completely drying at 80 ℃, and grinding into ultrafine powder with the Bosch specific surface area of more than 600m 2/kg by using a ball mill to obtain a component A;
Preparation of component B: 100 parts of hydroxyethyl acrylate, 0.15 part of dicumyl peroxide (DCP) as an initiator, 10 parts of diallyl alcohol-terminated polyoxyethylene ether (with a molecular weight of 1200) as a solvent and 500g of water/acetone (1:1, w:w) as a solvent are added into a three-neck flask, and uniformly stirred for 4 hours at 70 ℃ to obtain a component B.
Preparation of concrete:
according to the dosage of the formula shown in the following table 3, the components A and B prepared above are firstly respectively and uniformly mixed, the pre-mixed concrete material is added within 30min, and the mixture is finally and uniformly mixed (stirred for at least 60 s) in a concrete mixer to obtain the concrete mixture. The pre-mixed concrete material is prepared by weighing and mixing sand, broken stone, cement, fly ash and mineral powder according to a certain proportion, adding additive and water, and stirring for 60s by using a concrete stirrer.
Comparative examples 5 to 6
Concrete materials were prepared using the concrete preparation method of example 1 in the amounts of the formulations shown in table 3 below.
Comparative example 7
Preparation of concrete additive:
preparation of component A: mixing 30 parts of tricalcium silicate, 20 parts of slag powder, 15 parts of fly ash, 1.5 parts of sodium carbonate and 25 parts of water, and curing for 48 hours at 75+/-5 ℃ with humidity of more than 95%; then completely drying at 80 ℃, and grinding into ultrafine powder with the Bosch specific surface area of more than 600m 2/kg by using a ball mill to obtain a component A;
preparation of component B: into a three-necked flask, 0.15 part of dicumyl peroxide (DCP) as an initiator, 10 parts of bisallyl alcohol-terminated polyoxyethylene ether (with a molecular weight of 1200) were added, 500g of water/acetone (1:1, w: w) as a solvent, and the mixture was stirred uniformly at 70℃for 4 hours to obtain a component B.
Preparation of concrete:
according to the dosage of the formula shown in the following table 3, the components A and B prepared above are firstly respectively and uniformly mixed, the pre-mixed concrete material is added within 30min, and the mixture is finally and uniformly mixed (stirred for at least 60 s) in a concrete mixer to obtain the concrete mixture. The pre-mixed concrete material is prepared by weighing and mixing sand, broken stone, cement, fly ash and mineral powder according to a certain proportion, adding additive and water, and stirring for 60s by using a concrete stirrer.
Comparative example 8
Preparation of concrete additive:
preparation of component A: mixing 30 parts of tricalcium silicate, 20 parts of slag powder, 15 parts of fly ash, 1.5 parts of sodium carbonate and 25 parts of water, and curing for 48 hours at 75+/-5 ℃ with humidity of more than 95%; then completely drying at 80 ℃, and grinding into ultrafine powder with the Bosch specific surface area of more than 600m 2/kg by using a ball mill to obtain a component A;
Preparation of component B: 75 parts of hydroxyethyl acrylate, 0.15 part of dicumyl peroxide (DCP) serving as an initiator, 10 parts of diallyl alcohol-terminated polyoxyethylene ether (with a molecular weight of 1200) serving as a solvent and 500g of water/acetone (1:1, w: w) serving as a solvent are added into a three-neck flask, and uniformly stirred for 4 hours at 70 ℃ to obtain a component B.
Preparation of concrete:
according to the dosage of the formula shown in the following table 3, the components A and B prepared above are firstly respectively and uniformly mixed, the pre-mixed concrete material is added within 30min, and the mixture is finally and uniformly mixed (stirred for at least 60 s) in a concrete mixer to obtain the concrete mixture. The pre-mixed concrete material is prepared by weighing and mixing sand, broken stone, cement, fly ash and mineral powder according to a certain proportion, adding additive and water, and stirring for 60s by using a concrete stirrer.
Comparative example 9
Preparation of concrete additive:
Preparation of component A: mixing 30 parts of tricalcium silicate, 20 parts of slag powder, 15 parts of fly ash and 25 parts of water fully, and curing for 48 hours at 75+/-5 ℃ with humidity of more than 95%; then completely drying at 80 ℃, and grinding into ultrafine powder with the Bosch specific surface area of more than 600m 2/kg by using a ball mill to obtain a component A;
Preparation of component B: 100 parts of hydroxyethyl acrylate, 0.15 part of dicumyl peroxide (DCP) as an initiator, 10 parts of diallyl alcohol-terminated polyoxyethylene ether (with a molecular weight of 1200) as a solvent and 500g of water/acetone (1:1, w:w) as a solvent are added into a three-neck flask, and uniformly stirred for 4 hours at 70 ℃ to obtain a component B.
Preparation of concrete:
according to the dosage of the formula shown in the following table 3, the components A and B prepared above are firstly respectively and uniformly mixed, the pre-mixed concrete material is added within 30min, and the mixture is finally and uniformly mixed (stirred for at least 60 s) in a concrete mixer to obtain the concrete mixture. The pre-mixed concrete material is prepared by weighing and mixing sand, broken stone, cement, fly ash and mineral powder according to a certain proportion, adding additive and water, and stirring for 60s by using a concrete stirrer.
Comparative example 10
Preparation of concrete additive:
Preparation of component A: fully mixing 20 parts of slag powder, 15 parts of fly ash, 1.5 parts of sodium carbonate and 25 parts of water, and curing for 48 hours at 75+/-5 ℃ with humidity of more than 95%; then completely drying at 80 ℃, and grinding into ultrafine powder with the Bosch specific surface area of more than 600m 2/kg by using a ball mill to obtain a component A;
Preparation of component B: 100 parts of hydroxyethyl acrylate, 0.15 part of dicumyl peroxide (DCP) as an initiator, 10 parts of diallyl alcohol-terminated polyoxyethylene ether (with a molecular weight of 1200) as a solvent and 500g of water/acetone (1:1, w:w) as a solvent are added into a three-neck flask, and uniformly stirred for 4 hours at 70 ℃ to obtain a component B.
Preparation of concrete:
according to the dosage of the formula shown in the following table 3, the components A and B prepared above are firstly respectively and uniformly mixed, the pre-mixed concrete material is added within 30min, and the mixture is finally and uniformly mixed (stirred for at least 60 s) in a concrete mixer to obtain the concrete mixture. The pre-mixed concrete material is prepared by weighing and mixing sand, broken stone, cement, fly ash and mineral powder according to a certain proportion, adding additive and water, and stirring for 60s by using a concrete stirrer.
Comparative example 11
Preparation of concrete additive:
preparation of component A: mixing 30 parts of tricalcium silicate, 20 parts of slag powder, 15 parts of fly ash, 1.5 parts of sodium carbonate and 25 parts of water, and curing for 48 hours at 75+/-5 ℃ with humidity of more than 95%; then completely drying at 80 ℃, and grinding into ultrafine powder with the Bosch specific surface area of more than 600m 2/kg by using a ball mill to obtain a component A;
Preparation of component B: 100 parts of hydroxyethyl acrylate, 0.15 part of dicumyl peroxide (DCP) as an initiator, 10 parts of monoalcohol terminated polyoxyethylene ether (with the molecular weight of 1200) and 500g of water/acetone (1:1, w: w) as a solvent are added into a three-neck flask, and uniformly stirred for 4 hours at 70 ℃ to obtain a component B.
Preparation of concrete:
according to the dosage of the formula shown in the following table 3, the components A and B prepared above are firstly respectively and uniformly mixed, the pre-mixed concrete material is added within 30min, and the mixture is finally and uniformly mixed (stirred for at least 60 s) in a concrete mixer to obtain the concrete mixture. The pre-mixed concrete material is prepared by weighing and mixing sand, broken stone, cement, fly ash and mineral powder according to a certain proportion, adding additive and water, and stirring for 60s by using a concrete stirrer.
Table 3 formulation for preparing concrete (material dosage unit is kg/m 3)
The concretes prepared in examples 4 to 7 and comparative examples 5 to 11 were subjected to compressive strength test at each age. The test results are shown in Table 4. Wherein the cement reduction was calculated as the reduction in cement usage from the cement usage in comparative example 1 in each group, cement reduction rate= (cement usage of comparative example 1-cement usage)/cement usage of comparative example 1 is 100%.
TABLE 4 Table 4
From the above test results, it is known that the compressive strength of the concrete materials prepared by using the concrete additive of the present application is superior to that of the comparative examples at all ages.
Furthermore, the descriptions of the terms "some embodiments," "other embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In the present application, the schematic representations of the above terms are not necessarily for the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples of the present application and features of various embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and they should be included in the protection scope of the present application.
Claims (9)
1. The low-carbon concrete additive comprises a component A and a component B, and is characterized in that the component A comprises, by weight, 25-35 parts of tricalcium silicate, 15-25 parts of slag powder, 10-20 parts of fly ash, 1-2 parts of sodium carbonate and 20-30 parts of water, which are fully mixed and cured, and then ground into ultrafine powder; the component B comprises the following components of uniformly mixing, by weight, 80-120 parts of hydroxyethyl acrylate, 0.10-0.20 part of dicumyl peroxide, 8-12 parts of diallyl alcohol end-capped polyoxyethylene ether and 180-220 parts of water/acetone solution, wherein the weight ratio of water to acetone in the water/acetone is 1:1, and stirring to obtain a solution; wherein the weight ratio of the component A to the component B is between 3:1 and 1:3.
2. The low carbon concrete additive according to claim 1, wherein the curing comprises curing at 70-80 ℃ with a humidity of 95% or more for 36-60 hours, and/or
The stirring is carried out at 65-75 ℃ for 4-6 hours.
3. The low carbon concrete additive according to claim 1 or 2, wherein after the curing, the cured mixture is completely dried at 70-90 ℃ before the grinding.
4. The low carbon concrete additive according to claim 1, wherein the b's specific surface area of component a is in the range of 600-1000m 2/kg.
5. A method for preparing a low carbon concrete additive, comprising:
mixing and curing 25-35 parts of tricalcium silicate, 15-25 parts of slag powder, 10-20 parts of fly ash, 1-2 parts of sodium carbonate and 20-30 parts of water by weight, and grinding into superfine powder to obtain a component A;
Adding 80-120 parts of hydroxyethyl acrylate, 0.10-0.20 part of dicumyl peroxide and 8-12 parts of diallyl alcohol end-capped polyoxyethylene ether into 180-220 parts of water/acetone solution, uniformly mixing, wherein the weight ratio of water to acetone in the water/acetone is 1:1, and stirring to obtain a component B;
the weight ratio of the component A to the component B is between 3:1 and 1:3.
6. The method according to claim 5, wherein the curing comprises curing at 70-80 ℃ with a humidity of 95% or more for 36-60 hours, and/or
The stirring is carried out at 65-75 ℃ for 4-6 hours.
7. The process according to claim 5 or 6, wherein the ultrafine powder has a Bosch specific surface area of 600m 2/kg or more.
8. A low carbon concrete comprising the concrete additive of any one of claims 1-4 and a cementitious material, wherein component a and component B in the concrete additive each comprise 0.25-1.5% of the total weight of the cementitious material.
9. A preparation method of low-carbon concrete comprises the following steps:
mixing component a and component B of the concrete additive according to any one of claims 1 to 4 uniformly, adding the mixed concrete additive to a concrete raw material, and stirring uniformly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410386171.6A CN117964276B (en) | 2024-04-01 | 2024-04-01 | Low-carbon concrete additive and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410386171.6A CN117964276B (en) | 2024-04-01 | 2024-04-01 | Low-carbon concrete additive and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117964276A CN117964276A (en) | 2024-05-03 |
| CN117964276B true CN117964276B (en) | 2024-06-18 |
Family
ID=90859925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410386171.6A Active CN117964276B (en) | 2024-04-01 | 2024-04-01 | Low-carbon concrete additive and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117964276B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114524909A (en) * | 2022-04-21 | 2022-05-24 | 石家庄市长安育才建材有限公司 | Ultra-high-strength concrete additive, preparation method thereof and ultra-high-strength concrete |
| CN115850682A (en) * | 2022-12-29 | 2023-03-28 | 科之杰新材料集团河南有限公司 | Polyether macromonomer containing dihydroxy terminated end and preparation method and application thereof |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB279466A (en) * | 1926-10-19 | 1928-06-21 | Selden Co | Base exchange bodies |
| JPS6320385A (en) * | 1986-07-12 | 1988-01-28 | Mitsubishi Mining & Cement Co Ltd | Delayed hardening soil stabilizer |
| WO2004076376A2 (en) * | 2003-02-26 | 2004-09-10 | Construction Research & Technology Gmbh | Strength improvement admixture |
| KR101601897B1 (en) * | 2014-02-04 | 2016-03-09 | 주식회사 삼표산업 | High Durable Concrete Composition For Revealing High Early Strength Using Modified Fly Ash |
| CN112390919B (en) * | 2019-08-14 | 2021-10-08 | 陕西科之杰新材料有限公司 | Water-retaining polycarboxylate superplasticizer and preparation method thereof |
| WO2021105823A1 (en) * | 2019-11-26 | 2021-06-03 | Navoday Sciences Private Limited | Chemically processed mineral additive for increasing the durability of cement and concrete |
| CN115286278B (en) * | 2022-07-08 | 2023-06-23 | 山东高速集团有限公司创新研究院 | Composite additive for fly ash-based concrete and preparation method and application thereof |
| CN116553858B (en) * | 2023-07-04 | 2023-09-05 | 湖南凝英新材料科技有限公司 | Low-carbon concrete additive and preparation method and application thereof |
| CN117447167A (en) * | 2023-10-27 | 2024-01-26 | 建筑材料工业技术监督研究中心 | Long-life low-carbon ferro-aluminate cement concrete and preparation method of segment made of same |
| CN117417519A (en) * | 2023-11-29 | 2024-01-19 | 科之杰新材料集团有限公司 | Hydroxyl-terminated polyether macromonomer and preparation method thereof, low-temperature rapid dispersion type ether polycarboxylate superplasticizer and preparation method thereof |
-
2024
- 2024-04-01 CN CN202410386171.6A patent/CN117964276B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114524909A (en) * | 2022-04-21 | 2022-05-24 | 石家庄市长安育才建材有限公司 | Ultra-high-strength concrete additive, preparation method thereof and ultra-high-strength concrete |
| CN115850682A (en) * | 2022-12-29 | 2023-03-28 | 科之杰新材料集团河南有限公司 | Polyether macromonomer containing dihydroxy terminated end and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117964276A (en) | 2024-05-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102603996B (en) | Ether type polycarboxylic acid slump retaining agent and preparation method thereof | |
| CN103102125A (en) | Manufactured sand underwater dispersion resistant concrete and preparation method thereof | |
| CN109650794A (en) | A kind of low slump loss concrete and preparation method thereof | |
| CN103951330B (en) | A kind of bridge High-performance clean water concrete and preparation method thereof | |
| CN108455930A (en) | A kind of green Cement-base material with ultra-high performance and preparation method thereof using drift-sand | |
| CN111153656B (en) | Green slow-setting concrete and production method thereof | |
| CN104876468A (en) | Functionalized polycarboxylic acid water reducer matched with silica fume and preparation method thereof | |
| CN104529221A (en) | Cement grinding aid and using method thereof | |
| CN105418013A (en) | Process for using latter admixing method to produce green concrete | |
| CN104692701A (en) | Room-temperature synthetic type polycarboxylic high performance water-reducing agent and preparation method thereof | |
| Feng et al. | Comparison of ester-based slow-release polycarboxylate superplasticizers with their polycarboxylate counterparts | |
| CN109455973A (en) | A kind of thixotropic agent suitable for 3D printing sulphoaluminate cement base material | |
| Li et al. | Study on the dispersion performance and mechanism of polycarboxylate superplasticizer by the long side‐chain dicarboxyl terminated | |
| CN107555828A (en) | A kind of strong concrete thinner | |
| CN104556785A (en) | Water-reducing metakaolin-based micro-expansion compacting agent and preparation method thereof | |
| CN117964276B (en) | Low-carbon concrete additive and preparation method and application thereof | |
| CN112279973A (en) | Polycarboxylate superplasticizer for pipe pile and preparation method and application thereof | |
| CN105481282A (en) | Spherical high-molecular water reducing agent and preparation method thereof | |
| CN113620669B (en) | Concrete, preparation method thereof and sleeper | |
| CN111646724A (en) | Water reducing agent for high-strength concrete and preparation method thereof | |
| CN107602774B (en) | Ether amphoteric polycarboxylic acid dispersant for wet grinding of wet fly ash and preparation method thereof | |
| JP3343163B2 (en) | Concrete and method for producing high-strength concrete compact using the same | |
| CN111574102A (en) | Composite concrete viscosity reducing material and application thereof | |
| CN110526655A (en) | A kind of cement-based self-leveling Wear-resisting terrace material and preparation method thereof of Modified Nickel slag preparation | |
| CN116874225B (en) | Glue-reducing type concrete water reducer and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |