CN115403311A - High slump loss resistant concrete and preparation method thereof - Google Patents
High slump loss resistant concrete and preparation method thereof Download PDFInfo
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- CN115403311A CN115403311A CN202211051241.XA CN202211051241A CN115403311A CN 115403311 A CN115403311 A CN 115403311A CN 202211051241 A CN202211051241 A CN 202211051241A CN 115403311 A CN115403311 A CN 115403311A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 67
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 36
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 claims abstract description 32
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 26
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 16
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229960005070 ascorbic acid Drugs 0.000 claims abstract description 16
- 235000010323 ascorbic acid Nutrition 0.000 claims abstract description 16
- 239000011668 ascorbic acid Substances 0.000 claims abstract description 16
- 239000004568 cement Substances 0.000 claims abstract description 16
- 235000019832 sodium triphosphate Nutrition 0.000 claims abstract description 16
- RUMACXVDVNRZJZ-UHFFFAOYSA-N 2-methylpropyl 2-methylprop-2-enoate Chemical compound CC(C)COC(=O)C(C)=C RUMACXVDVNRZJZ-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000004575 stone Substances 0.000 claims abstract description 12
- 239000010881 fly ash Substances 0.000 claims abstract description 11
- 239000004576 sand Substances 0.000 claims abstract description 11
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 25
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 20
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000014759 maintenance of location Effects 0.000 claims description 4
- -1 isoamylene alcohol Chemical compound 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- 125000001844 prenyl group Chemical group [H]C([*])([H])C([H])=C(C([H])([H])[H])C([H])([H])[H] 0.000 claims description 2
- 239000002994 raw material Substances 0.000 abstract description 8
- 238000012360 testing method Methods 0.000 abstract description 7
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 abstract 1
- ASUAYTHWZCLXAN-UHFFFAOYSA-N prenol Chemical compound CC(C)=CCO ASUAYTHWZCLXAN-UHFFFAOYSA-N 0.000 description 6
- 238000005303 weighing Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- CYUZOYPRAQASLN-UHFFFAOYSA-N 3-prop-2-enoyloxypropanoic acid Chemical compound OC(=O)CCOC(=O)C=C CYUZOYPRAQASLN-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920005646 polycarboxylate Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000008030 superplasticizer Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a preparation method of slump retaining concrete, which comprises the following raw materials, by weight, 390-410 parts of cement, 860-880 parts of broken stone, 150-170 parts of calcareous sand, 130-150 parts of water, 50-70 parts of fly ash and 10-12 parts of a high-performance water reducing agent, wherein the high-performance water reducing agent is prepared from ethylene glycol monoethyl ether, isobutyl methacrylate, acrylic acid, hydrogen peroxide, ascorbic acid and sodium tripolyphosphate. The high slump retaining concrete prepared by the invention has the compression strength meeting the C60 concrete standard, and has good slump retaining performance through a simulated long-distance transportation test.
Description
Technical Field
The invention relates to the field of concrete preparation, in particular to a preparation method of high slump retaining concrete.
Background
The concrete cement in China is of various types, the concrete quality is reduced due to factors such as long concrete transportation distance, long construction time and air temperature, the traditional meaning of the change of the concrete slump along with time is that the concrete slump is considered to be reduced along with the lapse of time, and the phenomenon is defined as the slump loss of the concrete. Under the condition of using the additive containing the slump-retaining polycarboxylic acid, the phenomenon that the slump of high-grade concrete is increased and then lost along with time sometimes occurs, and the high-grade concrete is called as 'reverse enlargement' or 'reverse enlargement' in the industry. The phenomenon of large reaction is closely related to slump retaining components and cement performance of the polycarboxylate superplasticizer. Therefore, a preparation method of the concrete with high slump resistance is provided.
Disclosure of Invention
In view of the above, the present invention aims to provide a method for preparing concrete with high slump retention, which solves the above problems.
The technical scheme of the invention is realized as follows:
the high slump retaining concrete comprises, by weight, 390-410 parts of cement, 860-880 parts of broken stone, 150-170 parts of calcareous sand, 130-150 parts of water, 50-70 parts of fly ash and 10-12 parts of a high-performance water reducing agent.
Further, the high-performance water reducing agent comprises ethylene glycol monovinyl polyoxyethylene ether, isobutyl methacrylate, acrylic acid, hydrogen peroxide, ascorbic acid and sodium tripolyphosphate.
Furthermore, the high-performance water reducing agent comprises, by weight, 0.8-1.2 parts of ethylene glycol monovinyl polyoxyethylene ether, 4.2-4.7 parts of isobutyl methacrylate, 3.8-4.2 parts of acrylic acid, 1.5-2 parts of hydrogen peroxide, 1.8-2.2 parts of ascorbic acid and 0.1-0.2 part of sodium tripolyphosphate.
Further, the preparation method of the high-performance water reducing agent comprises the following steps:
(1) Adding prenyl alcohol polyoxyethylene ether, sodium tripolyphosphate and water into a four-neck flask, heating to 40-50 ℃, preserving heat for 5-10min, and dropwise adding hydrogen peroxide after finishing preserving heat to obtain a component A;
(2) Adding isobutyl methacrylate, acrylic acid, ascorbic acid and water into the component A, heating to 60-70 ℃, and preserving heat for 2-3 hours to obtain the high-performance water reducing agent.
Further, in the step (1), the mass ratio of the water to the prenyl polyoxyethylene ether is 15-17.
Further, in the step (2), the mass ratio of the water to the component A is 5-8:1.
Further, the preparation method of the high slump retaining concrete comprises the step of stirring and mixing cement, broken stone, calcareous sand, water, fly ash and a high-performance water reducing agent.
Furthermore, the particle size of the crushed stone is 10-20mm.
Compared with the prior art, the invention has the beneficial effects that:
the high-performance water reducing agent takes ethylene glycol monoethyl polyoxyethylene ether, isobutyl methacrylate, acrylic acid, hydrogen peroxide, ascorbic acid and sodium tripolyphosphate as raw materials, and is scientifically proportioned, so that a cross-linking structure in a water reducing agent molecule is increased, the main chain polymerization degree of the water reducing agent molecule is improved, the main chain length is regulated, the main chain polymerization degree is improved, the main chain length is controlled, the water reducing agent has more adsorption groups, the surface of concrete is adsorbed more easily, the dispersion performance is improved along with the improvement, and the performance of the concrete is further improved. The high slump-retaining concrete prepared by the method disclosed by the invention has the compression strength meeting the C60 concrete standard, and has good slump-retaining property through a simulated long-distance transport test.
Detailed Description
In order to better understand the technical content of the invention, specific examples are provided below to further illustrate the invention.
The experimental methods used in the examples of the present invention are all conventional methods unless otherwise specified.
The materials, reagents and the like used in the examples of the present invention can be obtained commercially without specific description.
Example 1
(1) Weighing 1.2 parts of ethylene glycol monovinyl polyoxyethylene ether, 4.7 parts of isobutyl methacrylate, 4.2 parts of acrylic acid, 2 parts of hydrogen peroxide, 2.2 parts of ascorbic acid and 0.2 part of sodium tripolyphosphate for later use.
(2) Adding prenyl alcohol polyoxyethylene ether, sodium tripolyphosphate and water into a four-neck flask, wherein the mass ratio of the water to the prenyl alcohol polyoxyethylene ether is 17;
(3) Adding isobutyl methacrylate, acrylic acid, ascorbic acid and water into the component A, wherein the mass ratio of the water to the component A is 8:1, heating to 70 ℃, and preserving heat for 3 hours to obtain the high-performance water reducing agent.
(4) According to the weight parts, 410 parts of cement, 880 parts of gravel, 170 parts of calcareous sand, 150 parts of water, 70 parts of fly ash and 12 parts of high-performance water reducing agent are weighed for later use.
(5) The cement, the broken stone, the calcareous sand, the water, the fly ash and the high-performance water reducing agent are stirred and mixed to obtain the cement-based water reducing agent, wherein the stirring speed is 150r/min, and the stirring time is 25min.
Example 2
(2) According to the parts by weight, 0.8 part of ethylene glycol monovinyl polyoxyethylene ether, 4.2 parts of isobutyl methacrylate, 3.8 parts of acrylic acid, 1.5 parts of hydrogen peroxide, 1.8 parts of ascorbic acid and 0.1 part of sodium tripolyphosphate are weighed for later use.
(2) Adding prenyl alcohol polyoxyethylene ether, sodium tripolyphosphate and water into a four-neck flask, wherein the mass ratio of the water to the prenyl alcohol polyoxyethylene ether is 15;
(3) Adding isobutyl methacrylate, acrylic acid, ascorbic acid and water into the component A, wherein the mass ratio of the water to the component A is 5:1, heating to 60 ℃, and preserving heat for 2 hours to obtain the high-performance water reducing agent.
(4) Weighing 390 parts of cement, 860 parts of broken stone, 150 parts of calcareous sand, 130 parts of water, 50 parts of fly ash and 10 parts of high-performance water reducing agent for later use.
(5) The cement, the broken stone, the calcareous sand, the water, the fly ash and the high-performance water reducing agent are stirred and mixed to obtain the cement-based water reducing agent, wherein the stirring speed is 150r/min, and the stirring time is 25min.
Example 3
(3) Weighing 1 part of ethylene glycol monovinyl polyoxyethylene ether, 4.5 parts of isobutyl methacrylate, 4 parts of acrylic acid, 1.7 parts of hydrogen peroxide, 2 parts of ascorbic acid and 0.15 part of sodium tripolyphosphate for later use.
(2) Adding isoamylene alcohol polyoxyethylene ether, sodium tripolyphosphate and water into a four-neck flask, wherein the mass ratio of the water to the isoamylene alcohol polyoxyethylene ether is 16;
(3) Adding isobutyl methacrylate, acrylic acid, ascorbic acid and water into the component A, wherein the mass ratio of the water to the component A is 6.5.
(4) Weighing 400 parts of cement, 870 parts of broken stone, 160 parts of calcareous sand, 140 parts of water, 60 parts of fly ash and 11 parts of high-performance water reducing agent for later use.
(5) The cement, the broken stone, the calcareous sand, the water, the fly ash and the high-performance water reducing agent are stirred and mixed to obtain the cement-based water reducing agent, wherein the stirring speed is 150r/min, and the stirring time is 25min.
Test example 1
The concrete obtained in examples 1 to 3 was examined for machine slump, slump after 3 hours, and 28-day compressive strength.
(1) Slump: the test is carried out according to GB/T50080-2016 Standard for Performance test methods of common concrete mixtures,
(2) Compressive strength: according to GB/T50080-2002 common concrete
| Name (R) | Slump out (mm) | Slump after 3h (mm) | Compressive strength (MPa) |
| Example 1 | 255 | 240 | 62.8 |
| Example 2 | 260 | 250 | 61.3 |
| Example 3 | 260 | 255 | 63.4 |
In conclusion, the experimental results show that the concrete prepared by the invention meets the C60 concrete standard, meanwhile, the slump is good, and the slump of the concrete meets the requirement after the test after the simulated transportation for 3 h.
Comparative example 1
The raw materials of the high-performance water reducing agent are adjusted on the basis of the embodiment 3, and specifically comprise the following components: weighing 1 part of prenyl alcohol polyoxyethylene ether, 4.5 parts of carboxyethyl acrylate, 4 parts of acrylic acid, 1.7 parts of hydrogen peroxide, 2 parts of ascorbic acid and 0.15 part of sodium tripolyphosphate.
The detection method was according to test example 1.
| Name (R) | Slump (mm) | Slump after 3h (mm) | Compressive strength (MPa) |
| Comparative example 1 | 230 | 195 | 55.8 |
Experimental results show that the compressive strength of the prepared concrete is reduced and the slump loss of the concrete is fast by adjusting the raw materials of the high-performance water reducing agent.
Comparative example 2
The proportion of the raw materials of the high-performance water reducing agent is adjusted on the basis of the embodiment 3, and the method specifically comprises the following steps: weighing 1 part of ethylene glycol monovinyl polyoxyethylene ether, 3 parts of isobutyl methacrylate, 2.2 parts of acrylic acid, 1.7 parts of hydrogen peroxide, 2 parts of ascorbic acid and 0.15 part of sodium tripolyphosphate for later use.
The detection method was as in test example 1.
| Name (R) | Slump out (mm) | Slump after 3h (mm) | Compressive strength (MPa) |
| Comparative example 2 | 240 | 200 | 57.8 |
Experimental results show that the concrete performance is reduced by adjusting the dosage of the raw material of the high-performance water reducing agent, the high-performance water reducing agent prepared by the method is scientifically matched with the rest components in the raw material of the concrete to prepare the high slump retaining concrete, and the prepared high-performance water reducing agent is poor in adsorption capacity and reduced in dispersity by adjusting the dosage of the raw material of the high-performance water reducing agent.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.
Claims (8)
1. The high slump retaining concrete is characterized by comprising 390-410 parts by weight of cement, 860-880 parts by weight of broken stone, 150-170 parts by weight of calcareous sand, 130-150 parts by weight of water, 50-70 parts by weight of fly ash and 10-12 parts by weight of a high-performance water reducing agent.
2. The high slump concrete of claim 1, wherein the high performance water reducing agent comprises ethylene glycol monovinyl polyoxyethylene ether, isobutyl methacrylate, acrylic acid, hydrogen peroxide, ascorbic acid and sodium tripolyphosphate.
3. The concrete with high slump retaining property as claimed in claim 2, wherein the high performance water reducing agent comprises, by weight, 0.8-1.2 parts of ethylene glycol monoethyl polyoxyethylene ether, 4.2-4.7 parts of isobutyl methacrylate, 3.8-4.2 parts of acrylic acid, 1.5-2 parts of hydrogen peroxide, 1.8-2.2 parts of ascorbic acid and 0.1-0.2 part of sodium tripolyphosphate.
4. The high slump retaining concrete of claim 3, wherein the preparation method of the high performance water reducing agent is as follows:
(1) Adding isoamylene alcohol polyoxyethylene ether, sodium tripolyphosphate and water into a four-neck flask, heating to 40-50 ℃, preserving heat for 5-10min, and dropwise adding hydrogen peroxide after finishing preserving heat to prepare a component A;
(2) Adding isobutyl methacrylate, acrylic acid, ascorbic acid and water into the component A, heating to 60-70 ℃, and preserving heat for 2-3 hours to obtain the high-performance water reducing agent.
5. The high slump retention concrete according to claim 4, wherein in the step (1), the mass ratio of water to the prenyl polyoxyethylene ether is 15-17.
6. The high slump retention concrete according to claim 4, wherein in the step (2), the mass ratio of water to component A is 5-8:1.
7. The high slump retention concrete according to claim 1, wherein the preparation method is that the concrete is prepared by mixing cement, broken stone, calcareous sand, water, fly ash and a high performance water reducing agent with stirring.
8. The concrete of claim 1, wherein the crushed stone has a particle size of 10 to 20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211051241.XA CN115403311A (en) | 2022-08-31 | 2022-08-31 | High slump loss resistant concrete and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211051241.XA CN115403311A (en) | 2022-08-31 | 2022-08-31 | High slump loss resistant concrete and preparation method thereof |
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| CN115403311A true CN115403311A (en) | 2022-11-29 |
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| CN202211051241.XA Pending CN115403311A (en) | 2022-08-31 | 2022-08-31 | High slump loss resistant concrete and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0920544A (en) * | 1995-07-05 | 1997-01-21 | Denki Kagaku Kogyo Kk | Cement composition and cast-in-place lining using the same |
| CN101274829A (en) * | 2008-05-08 | 2008-10-01 | 同济大学 | High-early-strength high-slump-retaining shrinkage-compensating self-compaction C60 concrete |
| CN103553490A (en) * | 2013-10-16 | 2014-02-05 | 北京新奥混凝土集团有限公司 | High-collapse-retentivity concrete, and preparation method and application thereof |
| CN109970926A (en) * | 2019-04-16 | 2019-07-05 | 山东卓星化工有限公司 | A method of polyocarboxy acid type high-thin arch dam water-reducing agent is prepared using ethylene glycol mono-vinyl polyoxyethylene ether ultralow temperature |
| CN114044858A (en) * | 2021-11-29 | 2022-02-15 | 眉山海螺新材料科技有限公司 | Comprehensive polycarboxylic acid water reducing agent and preparation method thereof |
-
2022
- 2022-08-31 CN CN202211051241.XA patent/CN115403311A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0920544A (en) * | 1995-07-05 | 1997-01-21 | Denki Kagaku Kogyo Kk | Cement composition and cast-in-place lining using the same |
| CN101274829A (en) * | 2008-05-08 | 2008-10-01 | 同济大学 | High-early-strength high-slump-retaining shrinkage-compensating self-compaction C60 concrete |
| CN103553490A (en) * | 2013-10-16 | 2014-02-05 | 北京新奥混凝土集团有限公司 | High-collapse-retentivity concrete, and preparation method and application thereof |
| CN109970926A (en) * | 2019-04-16 | 2019-07-05 | 山东卓星化工有限公司 | A method of polyocarboxy acid type high-thin arch dam water-reducing agent is prepared using ethylene glycol mono-vinyl polyoxyethylene ether ultralow temperature |
| CN114044858A (en) * | 2021-11-29 | 2022-02-15 | 眉山海螺新材料科技有限公司 | Comprehensive polycarboxylic acid water reducing agent and preparation method thereof |
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| Title |
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