CN113480249A - Anti-cracking recycled concrete and preparation method thereof - Google Patents
Anti-cracking recycled concrete and preparation method thereof Download PDFInfo
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- CN113480249A CN113480249A CN202110877587.4A CN202110877587A CN113480249A CN 113480249 A CN113480249 A CN 113480249A CN 202110877587 A CN202110877587 A CN 202110877587A CN 113480249 A CN113480249 A CN 113480249A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
Abstract
The application relates to the field of concrete, and specifically discloses anti-cracking recycled concrete and a preparation method thereof, wherein a waterproof corrosion-resistant wood board for a laboratory ventilation cabinet comprises: 55-60 parts of cement, 20-30 parts of water, 25-30 parts of fly ash, 0.2-0.4 part of cellulose ether, 6-8 parts of entangled fibers, 3-5 parts of SiO2 aerogel particles and 80-100 parts of recycled aggregate; the entanglement fibers are prepared by mixing wollastonite fibers and polypropylene fibers according to the mass ratio of 1: 6-8. The preparation method comprises the following preparation steps: s1, coating and modifying recycled aggregate; s2, pre-mixing; and S3, mixing again. The recycled concrete selects wollastonite fibers and polypropylene fibers to be entangled and compounded, the wollastonite fibers and the polypropylene fibers are mutually overlapped to form a three-dimensional network, and the three-dimensional network and a concrete aggregate structure resist the shear force together, so that the crack resistance of the recycled concrete material is improved.
Description
Technical Field
The application relates to the field of concrete, in particular to anti-cracking recycled concrete and a preparation method thereof.
Background
The regenerated concrete is prepared by crushing, cleaning and grading waste concrete blocks, mixing the crushed, cleaned and graded waste concrete blocks with a grading agent according to a certain proportion, partially or completely replacing natural aggregates (mainly coarse aggregates) such as sand stones and the like, and adding cement, water and the like.
The effective recovery treatment of the waste concrete for replacing natural aggregate is a necessary choice for saving energy and protecting the environment. The significance lies in that: firstly, the function of protecting the ecological environment of the aggregate producing area can be achieved; secondly, the utility model can help solve a series of problems caused by the stacking of the waste.
However, as the recycled concrete is processed by the waste concrete, the surface of the recycled concrete is wrapped by the hardened cement mortar, and new cement mortar is added in the preparation process, the total content of the new and old cement mortar in the recycled concrete is higher than that of the common concrete, and the sum of the porosities of the new and old mortar and the aggregate is slightly higher than that of the common concrete; in addition, the interface transition region of the recycled concrete is not as strong as the natural concrete, and the primary defects are propagated by the development of pore cracks in the interface transition region and gradually form continuous channels, eventually resulting in deterioration of the durability of the recycled concrete.
Disclosure of Invention
In order to improve the defect that the crack resistance of the existing recycled concrete is poor, the application provides the crack-resistant recycled concrete and the preparation method thereof, and the following technical scheme is adopted:
in a first aspect, the application provides an anti-cracking recycled concrete, which adopts the following technical scheme:
the anti-cracking recycled concrete comprises the following substances in parts by weight: 55-60 parts of cement, 20-30 parts of water, 25-30 parts of fly ash, 0.2-0.4 part of cellulose ether, 6-8 parts of entangled fiber and 3-5 parts of SiO2Aerogel particles and 80-100 parts of recycled aggregate; the entanglement fibers are prepared by mixing wollastonite fibers and polypropylene fibers according to the mass ratio of 1: 6-8.
By adopting the technical scheme, the silica aerogel particles are selected as main materials for preparation, and the silica aerogel particles are amorphous materials with three-dimensional net structures formed by nano particles, have the properties of large specific surface area and high porosity, are added into recycled concrete materials, and improve the compressive strength of the thermal insulation mortar, so that the mechanical property of the thermal insulation non-dismantling template is further improved.
Simultaneously, select among this application technical scheme to tangle compound with wollastonite fibre and polypropylene fiber, through wollastonite fibre and polypropylene fiber through organic/inorganic compound entanglement structure, overlap joint each other and form three-dimensional network, with the effect of concrete aggregate structure common resistance shear force, improved recycled concrete material's anti-crack strength, form effectual alternate complex with aerogel material simultaneously to concrete material's mechanical properties and anti-crack strength have further been improved.
Further, the anti-cracking recycled concrete further comprises 3-8 parts by weight of rubber powder.
By adopting the technical scheme, the rubber powder material is added into the recycled concrete material, the pore structure of the concrete is changed by the doping of the polymer rubber powder, and the concrete has lower volume density and compactness due to the light weight and the air-entraining effect of the rubber powder material. Meanwhile, the rubber powder is an elastic material and can be effectively used as a stress unloading part to well treat and improve the existence of cracks, so that the mechanical property and the crack resistance of the concrete material are further improved.
Furthermore, the particle size of the rubber powder is 0.05-0.25 mm.
By adopting the technical scheme, the particle size of the rubber powder is optimized, and the cracking pores of the recycled aggregate in the recycled concrete can be further filled, so that the crack size of the recycled concrete material is reduced, and a network structure formed by the rubber powder plays a good compensation role on the concrete, so that the mechanical property and the crack resistance of the concrete material are further improved.
Further, the anti-cracking recycled concrete further comprises 10-15 parts by weight of coating modified sol, and the solid content of the coating modified sol is 15-18%.
By adopting the technical scheme, the coating modified sol is added into the anti-cracking concrete, and cracks and pore channels formed in the recycled concrete are repaired and compensated in advance through the coating modified sol, so that the strength and the performance of the recycled aggregate in the recycled concrete are effectively improved fundamentally, and the mechanical property and the anti-cracking strength of the concrete material are further improved in the subsequent use process of the recycled concrete material.
Further, the coating modified sol is a silicon-aluminum composite sol, and the silicon-aluminum composite sol is prepared by adopting the following scheme:
(1) taking an aluminum nitrate solution and aluminum isopropoxide particles, stirring, mixing, grinding, dispersing, collecting dispersed slurry, stirring, and hydrolyzing to obtain an aluminum source hydrolysate;
(2) mixing ethyl orthosilicate and water, adjusting the pH value to 6.0 by using glacial acetic acid, and stirring and hydrolyzing to obtain silicon source hydrolysate;
(3) mixing the silicon source hydrolysate and the aluminum source hydrolysate, performing thermal polycondensation reaction, adjusting the pH value by adopting glacial acetic acid, performing thermal insulation, stirring and entanglement treatment, standing and cooling to room temperature to obtain the silicon-aluminum composite sol.
Through adopting above-mentioned technical scheme, because this application is through alternate compound with silica sol and aluminium sol organic, form good interlace, further improved the structure and the intensity of cladding modified sol, make it in the in-service use, can not only effectively restore and compensate the hole of regeneration aggregate, can also be in subsequent dry forming process, act as the skeleton of concrete material to at the inside good bearing structure that forms of concrete, and then effectively improve concrete material's mechanical strength.
Further, the pH value of the heat-preservation stirring entanglement treatment is 2.5-3.0.
Through adopting above-mentioned technical scheme, this application has optimized the pH value of tangling processing, makes the sol structure that the tangling was handled and is formed more perfect, has improved the bonding strength between the sol material simultaneously to can not only effectively restore and compensate the hole of regeneration aggregate, can also be in subsequent dry forming process, act as the skeleton of concrete material, thereby form good bearing structure in the inside of concrete, and then effectively improve the mechanical strength of concrete material.
In a second aspect, the application provides a preparation method of anti-cracking recycled concrete, which adopts the following technical scheme:
a preparation method of anti-cracking recycled concrete comprises the following specific preparation steps:
s1, coating and modifying recycled aggregate: mixing the recycled aggregate and the coated modified sol according to the formula, stirring and mixing at room temperature under 0.5-0.8 MPa, keeping the temperature and drying at 55-60 ℃, standing and cooling to room temperature, and collecting the coated modified recycled aggregate;
s2, pre-mixing; mixing cement, fly ash, coated modified recycled aggregate and rubber powder according to a formula, and collecting premix;
s3, mixing again: the premix, water, cellulose ether, entangled fiber and SiO2 aerogel particles are stirred and mixed to prepare the anti-cracking recycled concrete.
Through adopting above-mentioned technical scheme, this application can make the sol material further permeate to the inside hole of concrete aggregate through earlier passing through sol entanglement coating to the regeneration aggregate, behind the pressurization treatment to make its mechanical properties further improve, simultaneously this application technical scheme premix material earlier, mix again under the environment that has the aqueous medium, can effectively prevent entanglement fiber and aerogel material by the aggregate destruction, further improved the mechanical strength of concrete material.
Further, the mixing rate of the premixing treatment in the step S2 is 600-800 r/min, and the re-mixing rate in the step S3 is 200-300 r/min.
Through adopting above-mentioned technical scheme, the speed of pre-mixing processing and the speed of remixing have been optimized in this application, and the speed is different between the two, because even material of mixing is coarse and the volume is big, needs rapid mixing to reach the effect that the raw materials mixes evenly, and during the follow-up mixing, it is fragile to entangle fibre and aerogel material structure, and low-speed stirring can not only guarantee the performance of accomplishing of its structure, can also further improve its dispersion degree to concrete material's crack resistance has further been improved.
In summary, the present application includes at least one of the following beneficial technical effects:
firstly, silica aerogel particles are selected as main materials for preparation, and the silica aerogel particles are amorphous materials with three-dimensional net structures formed by nano particles, have the properties of large specific surface area and high porosity, and are added into recycled concrete materials, so that the compressive strength of the thermal insulation mortar is improved, and the mechanical property of the thermal insulation non-dismantling template is further improved.
Simultaneously, select among this application technical scheme to tangle compound with wollastonite fibre and polypropylene fiber, through wollastonite fibre and polypropylene fiber through organic/inorganic compound entanglement structure, overlap joint each other and form three-dimensional network, with the effect of concrete aggregate structure common resistance shear force, improved recycled concrete material's anti-crack strength, form effectual alternate complex with aerogel material simultaneously to concrete material's mechanical properties and anti-crack strength have further been improved.
Secondly, the rubber powder material is added into the recycled concrete material, the pore structure of the concrete is changed by the doping of the polymer rubber powder, and the concrete has lower volume density and compactness due to the light property and the air entraining effect of the rubber powder material. Meanwhile, the rubber powder is an elastic material and can be effectively used as a stress unloading part to well treat and improve the existence of cracks, so that the mechanical property and the crack resistance of the concrete material are further improved.
Thirdly, the coating modified sol is added into the anti-cracking concrete, and cracks and pore channels formed in the recycled concrete are repaired and compensated in advance through the coating modified sol, so that the strength and the performance of the recycled aggregate in the recycled concrete are effectively improved fundamentally, and the mechanical property and the anti-cracking strength of the concrete material are further improved in the subsequent use process of the recycled concrete material.
Fourth, the recycled aggregate is wrapped by sol entanglement, and the sol material can further penetrate into the pores of the concrete aggregate after pressurization treatment, so that the mechanical property of the recycled aggregate is further improved.
Detailed Description
The present application will be described in further detail with reference to examples and comparative examples.
The starting materials for the preparation examples, examples and comparative examples of the present application are commercially available unless otherwise specified.
Preparation of silicon-aluminium composite sol
Preparation example 1
(1) Taking 2kg of aluminum nitrate solution and 0.1kg of aluminum isopropoxide particles, stirring, mixing, grinding, dispersing, collecting dispersed slurry, stirring and hydrolyzing to obtain aluminum source hydrolysate;
(2) mixing 3kg of ethyl orthosilicate and 10kg of water, adjusting the pH value to 6.0 by using glacial acetic acid, and stirring and hydrolyzing to obtain silicon source hydrolysate;
(3) mixing 1kg of silicon source hydrolysis liquid and 2kg of aluminum source hydrolysis liquid, placing the mixture in a thermal insulation polycondensation reaction at 60 ℃, adjusting the pH to 2.5 by adopting glacial acetic acid, performing thermal insulation, stirring and entanglement treatment, standing and cooling to room temperature to obtain the silicon-aluminum composite sol 1.
Preparation example 2
(1) Taking 3kg of aluminum nitrate solution and 0.2kg of aluminum isopropoxide particles, stirring, mixing, grinding, dispersing, collecting dispersed slurry, stirring and hydrolyzing to obtain aluminum source hydrolysate;
(2) mixing 4kg of ethyl orthosilicate and 12kg of water, adjusting the pH value to 6.0 by using glacial acetic acid, and stirring and hydrolyzing to obtain silicon source hydrolysate;
(3) mixing 1kg of silicon source hydrolysis liquid and 2kg of aluminum source hydrolysis liquid, placing the mixture in a thermal insulation polycondensation reaction at 70 ℃, adjusting the pH to 2.7 by adopting glacial acetic acid, performing thermal insulation, stirring and entanglement treatment, standing and cooling to room temperature to obtain the silicon-aluminum composite sol 2.
Preparation example 3
(1) Taking 3kg of aluminum nitrate solution and 0.2kg of aluminum isopropoxide particles, stirring, mixing, grinding, dispersing, collecting dispersed slurry, stirring and hydrolyzing to obtain aluminum source hydrolysate;
(2) mixing 5kg of ethyl orthosilicate and 15kg of water, adjusting the pH value to 6.0 by using glacial acetic acid, and stirring and hydrolyzing to obtain silicon source hydrolysate;
(3) mixing 1kg of silicon source hydrolysis liquid and 3kg of aluminum source hydrolysis liquid, placing the mixture in a thermal insulation polycondensation reaction at 80 ℃, adjusting the pH to 3.0 by adopting glacial acetic acid, performing thermal insulation, stirring and entanglement treatment, standing and cooling to room temperature to obtain the silicon-aluminum composite sol 3.
Examples of preparation of entangled fibers
Preparation example 4
1kg of wollastonite fiber and 6kg of polypropylene fiber are stirred and mixed to prepare the entangled fiber 1.
Preparation example 5
1kg of wollastonite fiber and 7kg of polypropylene fiber are stirred and mixed to prepare the entangled fiber 2.
Preparation example 6
1kg of wollastonite fiber and 8kg of polypropylene fiber are stirred and mixed to prepare the entangled fiber 3.
Examples
Example 1
S1, pre-mixing; taking 55kg of cement, 25kg of fly ash and 80kg of recycled aggregate, stirring and mixing at 600r/min, and collecting premix;
s2, mixing again: 20kg of water, 0.2kg of cellulose ether, 6kg of entangled fibres 1 and 3kg of SiO were taken2And stirring and mixing the aerogel particles at 200r/min to prepare the anti-cracking recycled concrete.
Example 2
S1, pre-mixing; placing 58kg of cement, 27kg of fly ash and 90kg of recycled aggregate into a mixer at 700r/min, stirring and mixing, and collecting premix;
s2, mixing again: in the mixing of premix, 25kg of water, 0.3kg of cellulose ether, 7kg of entangled fibers 2 and 4kg of SiO2And stirring and mixing the aerogel particles at 250r/min to prepare the anti-cracking recycled concrete.
Example 3
S1, pre-mixing; taking 60kg of cement, 30kg of fly ash and 100kg of recycled aggregate, stirring and mixing at 600-800 r/min, and collecting the premix;
s2, mixing again: 30kg of water, 0.4kg of cellulose ether, 8kg of entangled fibres 3 and 5kg of SiO were taken2And stirring and mixing the aerogel particles at 300r/min to prepare the anti-cracking recycled concrete.
Example 4
The anti-cracking recycled concrete is different from the recycled concrete in example 1 in that in example 4, recycled aggregate is coated before step S1, and the concrete steps are as follows:
coating and modifying recycled aggregate: mixing 80kg of recycled aggregate with 10kg of silicon-aluminum composite sol 1 with the solid content of 15%, stirring and mixing at room temperature under 0.5MPa, keeping the temperature and drying at 55 ℃, standing and cooling to room temperature, and collecting the coated modified recycled aggregate;
the remaining preparation and material composition were the same as in example 1.
Example 5
The difference between the anti-cracking recycled concrete and the example 4 is that in the example 5, 12kg of silicon-aluminum composite sol 2 with the solid content of 16% is adopted to replace the silicon-aluminum composite sol 1 in the example 4 to prepare the coated modified recycled aggregate, and the rest of preparation schemes and material compositions are the same as those in the example 4.
Example 6
The difference between the anti-cracking recycled concrete and the example 4 is that in the example 5, 15kg of silicon-aluminum composite sol 3 with the solid content of 18% is adopted to replace the silicon-aluminum composite sol 1 in the example 4 to prepare the coated modified recycled aggregate, and the rest of preparation schemes and material compositions are the same as those in the example 4.
Example 7
The anti-cracking recycled concrete is different from the concrete in example 4 in that rubber powder with the particle size of 3kg and 0.05mm is added in the premixing treatment process in example 7, and the rest preparation schemes and material compositions are the same as those in example 4.
Example 8
The anti-cracking recycled concrete is different from the concrete in example 4 in that 5kg of rubber powder with the particle size of 0.1mm is added in the premixing treatment process in example 8, and the rest preparation schemes and material compositions are the same as those in example 4.
Example 9
The anti-cracking recycled concrete is different from the concrete in example 4 in that 8kg of rubber powder with the particle size of 0.2mm is added in the premixing treatment process in example 9, and the rest preparation schemes and material compositions are the same as those in example 4.
Comparative example
Comparative example 1: a method for preparing a crack-resistant recycled concrete, which is different from example 1 in that entangled fibers are not added in comparative example 1.
Comparative example 2: the preparation method of the anti-cracking recycled concrete is different from the embodiment 1 in that: all the materials in comparative example 2 were directly mixed and stirred.
Performance test
The performance tests were performed on the recycled concrete materials prepared in examples 1 to 9 and comparative examples 1 to 2, respectively.
Detection method/test method
The concrete cracking resistance is tested according to a test method of the concrete cracking resistance specified in GB/T50082-2009 Standard test method for the long-term performance and the durability of ordinary concrete, and the size of a cracking test specimen is 800 mm multiplied by 600 mm multiplied by 100 mm. After the test piece is molded for 0.5h, the test piece is moved to a drying curing chamber with the temperature set to be (20 +/-2) ° C and the relative humidity set to be (60 +/-5)% for subsequent tests. And adjusting the position and the gear of the electric fan to enable the wind speed above the surface of the test piece to be about 5m/s and ensure that the wind direction is parallel to the surface of the test piece and the crack inducer. After the test piece is molded for 24 hours, the length of the crack is measured by using a ruler accurate to 0.1mm, the width of the crack is observed by using a microscope with the magnification of 100 times, the result is accurate to 0.02mm, the total crack area and the number of the crack in each group are counted, and the specific detection result is shown in the following table 1:
TABLE 1 EXAMPLES 1 TO 9 TO 2, COMPARATIVE EXAMPLE 1 Performance test
Performance analysis was performed from table 1 above:
(1) the data of the table 1 show that the data of the embodiments 7 to 9 are the most excellent and have good water-resistant and corrosion-resistant properties, and the technical scheme of the application adopts a scheme of combining silica aerogel particles, wollastonite fibers and polypropylene fibers by entanglement compounding, so that the mechanical property and the anti-cracking strength of a concrete material are improved, the pore structure of the concrete is changed by adding a rubber powder material into the concrete material, the crack is effectively treated and improved as a stress unloading part, so that the mechanical property and the anti-cracking strength of the concrete material are further improved, finally, the crack and the pore formed in the recycled concrete are repaired and compensated in advance by adding a coating modified sol into the anti-cracking concrete and by coating the coating modified sol, therefore, the strength and the performance of the recycled aggregate in the recycled concrete are effectively improved fundamentally, and the mechanical property and the crack resistance of the concrete material are further improved in the subsequent use process of the recycled concrete material.
(2) Carry out the performance contrast with this application technical scheme comparison document 1 and embodiment 1, combine table 1 data to see out, this application technical scheme chooses wollastonite fiber and polypropylene fiber to entangle compound, through wollastonite fiber and polypropylene fiber through organic/inorganic compound entanglement structure, the overlap joint forms three-dimensional network each other, with the effect of the common resistance to shear force of concrete aggregate structure, the anti-crack strength of recycled concrete material has been improved, form effectual interlude complex with aerogel material simultaneously, thereby the mechanical properties and the anti-crack strength of concrete material have further been improved.
(3) Comparing the comparative example 2 and the example 1, and combining the data in the table 1, the invention can see that the entanglement fiber and the aerogel material can be effectively prevented from being damaged by the aggregate by premixing the materials and then mixing the materials again in the environment with the aqueous medium, and the mechanical strength of the concrete material is further improved.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. The anti-cracking recycled concrete is characterized by comprising the following substances in parts by weight:
55-60 parts of cement;
20-30 parts of water;
25-30 parts of fly ash;
0.2-0.4 parts of cellulose ether;
6-8 parts of entangled fibers;
3-5 parts of SiO2Aerogel particles;
80-100 parts of recycled aggregate; the entanglement fibers are prepared by mixing wollastonite fibers and polypropylene fibers according to the mass ratio of 1: 6-8.
2. The crack-resistant recycled concrete according to claim 1, further comprising 3-8 parts by weight of rubber powder.
3. The anti-cracking recycled concrete according to claim 2, wherein the grain size of the rubber powder is 0.05-0.25 mm.
4. The crack-resistant recycled concrete according to claim 1, further comprising 10-15 parts by weight of a coating modified sol, wherein the solid content of the coating modified sol is 15-18%.
5. The anti-cracking recycled concrete according to claim 4, wherein the coating modified sol is a silicon-aluminum composite sol, and the silicon-aluminum composite sol is prepared by adopting the following scheme:
(1) taking an aluminum nitrate solution and aluminum isopropoxide particles, stirring, mixing, grinding, dispersing, collecting dispersed slurry, stirring, and hydrolyzing to obtain an aluminum source hydrolysate;
(2) mixing ethyl orthosilicate and water, adjusting the pH value to 6.0 by using glacial acetic acid, and stirring and hydrolyzing to obtain silicon source hydrolysate;
(3) mixing the silicon source hydrolysate and the aluminum source hydrolysate, performing thermal polycondensation reaction, adjusting the pH value by adopting glacial acetic acid, performing thermal insulation, stirring and entanglement treatment, standing and cooling to room temperature to obtain the silicon-aluminum composite sol.
6. The anti-cracking recycled concrete according to claim 5, wherein the pH value of the heat-preservation stirring entanglement treatment is 2.5-3.0.
7. The preparation method of the crack-resistant recycled concrete according to any one of claims 1 to 6, characterized by comprising the following preparation steps:
s1, coating and modifying recycled aggregate: mixing the recycled aggregate and the coated modified sol according to the formula, stirring and mixing at room temperature under 0.5-0.8 MPa, keeping the temperature and drying at 55-60 ℃, standing and cooling to room temperature, and collecting the coated modified recycled aggregate;
s2, pre-mixing; mixing cement, fly ash, coated modified recycled aggregate and rubber powder according to a formula, and collecting premix;
S3、and (3) mixing again: mixing premix, water, cellulose ether, entangled fiber and SiO2And stirring and mixing the aerogel particles to prepare the anti-cracking recycled concrete.
8. The method for preparing anti-cracking recycled concrete according to claim 7, wherein the mixing rate of the premixing treatment in step S2 is 600-800 r/min, and the mixing rate of the remixing in step S3 is 200-300 r/min.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113998943A (en) * | 2021-11-25 | 2022-02-01 | 杨洋 | Heat preservation type recycled concrete |
| CN114538865A (en) * | 2022-03-02 | 2022-05-27 | 广东台实实业有限公司 | Anti-seepage leak-stopping material and preparation method thereof |
| CN114790099A (en) * | 2022-04-14 | 2022-07-26 | 宁波新广亿建材有限公司 | Dry-mixed mortar and preparation method thereof |
| CN115403288A (en) * | 2022-09-26 | 2022-11-29 | 河海大学 | Concrete anti-cracking agent and preparation method and use method thereof |
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2021
- 2021-08-01 CN CN202110877587.4A patent/CN113480249A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113998943A (en) * | 2021-11-25 | 2022-02-01 | 杨洋 | Heat preservation type recycled concrete |
| CN113998943B (en) * | 2021-11-25 | 2022-12-27 | 台州银基建材有限公司 | Heat preservation type recycled concrete |
| CN114538865A (en) * | 2022-03-02 | 2022-05-27 | 广东台实实业有限公司 | Anti-seepage leak-stopping material and preparation method thereof |
| CN114790099A (en) * | 2022-04-14 | 2022-07-26 | 宁波新广亿建材有限公司 | Dry-mixed mortar and preparation method thereof |
| CN115403288A (en) * | 2022-09-26 | 2022-11-29 | 河海大学 | Concrete anti-cracking agent and preparation method and use method thereof |
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