CN111635161A - Polycarboxylic acid high-performance water reducer for coarse aggregate with high water absorption rate, and preparation and application thereof - Google Patents
Polycarboxylic acid high-performance water reducer for coarse aggregate with high water absorption rate, and preparation and application thereof Download PDFInfo
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- CN111635161A CN111635161A CN202010431570.1A CN202010431570A CN111635161A CN 111635161 A CN111635161 A CN 111635161A CN 202010431570 A CN202010431570 A CN 202010431570A CN 111635161 A CN111635161 A CN 111635161A
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- polycarboxylic acid
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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
- 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
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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
- 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
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- Ceramic Engineering (AREA)
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- Structural Engineering (AREA)
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the field of building material additives, and particularly relates to a polycarboxylic acid high-performance water reducing agent for coarse aggregate concrete with high water absorption rate, and preparation and application thereof. The water reducing agent comprises: polycarboxylic acid superplasticizer I: 4.00-40.00%, polycarboxylic acid superplasticizer II: 1.00-20.00%, defoaming agent: 0.01% -1.00%, air entraining agent: 0.00% -1.00%, retarder: 0.05-10.00%, bleeding inhibitor: 0.10% -2.00%, adsorption inhibitor: 0.00% -2.00% and water: 26.00-68.00%. The polycarboxylic acid high-performance water reducing agent has the characteristics of low air entraining and high water reducing performance, improves the uniformity of concrete, can inhibit post-bleeding, has low shrinkage rate and good slump retaining capacity and the like, and can be suitable for preparing coarse aggregate high-performance concrete with high water absorption rate.
Description
Technical Field
The invention belongs to the field of building material additives, and particularly relates to a polycarboxylic acid high-performance water reducing agent for coarse aggregate concrete with high water absorption rate, and preparation and application thereof.
Background
In recent years, with the popularization and application of high-performance concrete, polycarboxylic acid water reducing agents have become the only water reducing agents capable of improving the performance of concrete. Compared with the traditional water reducing agent, the new-generation polycarboxylate water reducing agent has the excellent performances of low mixing amount, high water reducing rate, good slump retaining property and the like.
Under some special geological structure environments, the material source of the high-quality coarse aggregate is very limited, and the coarse aggregate which can meet the national standard requirement is high in price and difficult to supply and cannot meet the field use requirement. Particularly in the African continent, common coarse aggregates can meet indexes such as gradation, crushing value and the like in the national standard GB/T14685-2011, but the water absorption rate is usually between 2% and 5%, and the requirement that the national standard is less than 2% is not met. When the aggregate with high water absorption is used for preparing concrete, under the condition of certain water consumption, the slump of the prepared concrete is smaller than that of common aggregate concrete, and the loss of fluidity is large over time, so that the requirement of pumping construction is difficult to meet; secondly, water absorbed by the coarse aggregate with high water absorption rate is easy to release water in the holes under high-strength vibration, so that water marks and even sand lines are easy to appear on the surface of the concrete; thirdly, compared with common aggregate concrete, the use of the coarse aggregate with high water absorption rate can increase the porosity in the concrete, thereby increasing the drying shrinkage rate; fourthly, the formed and hardened concrete has more internal defects, and corrosive ions are easy to permeate, thereby seriously influencing the service life of the concrete in the marine environment.
For aggregate concrete with high water absorption, domestic and foreign researches mainly focus on lightweight aggregate and recycled aggregate with high water absorption, such as pre-wetting to make the aggregate reach saturation surface dryness or selecting waterproof polymer for pretreatment. The patent CN103145363A provides a polycarboxylate superplasticizer for recycled aggregate concrete, and the prepared polycarboxylate superplasticizer has high water reducing rate and good dispersibility, and can be well suitable for recycled aggregate concrete; the patent CN103172298A discloses a special high-efficiency water reducing agent for recycled aggregate concrete, which can obviously improve the working performance of the recycled aggregate concrete, reduce the time loss of the working performance and improve the mechanical strength to a certain extent. The appearance and the drying shrinkage rate characteristics of concrete are not noted in the above patents, and the mixing amount of the water reducing agent is high. For natural aggregates with high water absorption, only a few documents suggest that sandstone has high water absorption, application performance of sandstone has not been researched, and a special water reducing agent has not been developed.
Disclosure of Invention
The invention aims to provide a polycarboxylic acid high-performance water reducing agent for coarse aggregates with high water absorption, and preparation and application thereof.
The technical scheme of the invention is as follows:
a polycarboxylic acid high-performance water reducing agent for coarse aggregates with high water absorption rate is prepared from the following substances in percentage by weight:
polycarboxylic acid superplasticizer I: 4.00% -40.00%;
polycarboxylic acid superplasticizer II: 1.00 to 20.00 percent
Defoaming agent: 0.01 to 1.00 percent;
air entraining agent: 0.00% -1.00%;
retarder: 0.05 percent to 10.00 percent;
bleeding inhibitors: 0.10 to 2.00 percent
Adsorption inhibitor: 0.00 to 2.00 percent
Water: 26.00-68.00%;
wherein:
the weight average molecular weight of the polycarboxylic acid superplasticizer I is 10000-120000;
the weight average molecular weight of the polycarboxylic acid superplasticizer II is 10000-120000;
the defoaming agent is a slow release defoaming agent;
the air entraining agent is sodium lauryl sulfate monoester;
the retarder is one or two of sodium gluconate and white sugar;
the bleeding inhibitor is 2-acrylamide-2-methylpropanesulfonic acid-N, N-dimethylacrylamide;
the adsorption inhibitor is polyvinyl alcohol.
The air entraining agent comprises: 0.00-1.00%, protection includes 0.00%, air entraining agent is not added, and 0.03-1.00% is further preferable.
The adsorption inhibitor described above: 0.00% to 2.00%, and the protection includes 0.00% and no adsorption inhibitor is added, and more preferably 0.02% to 2.00%.
The polycarboxylic acid superplasticizer (I) is a polycarboxylic acid superplasticizer containing the following structural general formula:
wherein R is1Represents hydrogen, methyl or a COOM group, R2Represents hydrogen, methyl or CH2COOM group, M represents hydrogen, monovalent metal, divalent metal, ammonium group or organic amine group; r3Represents hydrogen or methyl; r4O represents an oxyalkylene group of 2 to 8 carbon atoms; r5Represents hydrogen or alkyl of 1 to 6 carbon atoms; n and m are any integers not equal to zero; q represents the number of methylene groups and is an integer of 0 to 2; k represents an average molar number of addition of the oxyalkylene group and is an arbitrary number of 1 to 180;
the polycarboxylic acid superplasticizer (II) is obtained by copolymerizing 5-92% of monomer A, 8-95% of monomer B and 0-30% of monomer C by mass percent, wherein the monomer A has a structure of a general formula (1):
wherein R is6Represents hydrogen, methyl or a-COOM group, R7Represents hydrogen, methyl or-CH2COOM group, M represents hydrogen, monovalent metal, divalent metal, ammonium group or organic amine group; r8O represents an oxyalkylene group of 2 to 8 carbon atoms; r9Represents hydrogen or alkyl of 1 to 6 carbon atoms; x represents the number of methylene groups and is an integer of 0-2; y represents the average molar number of addition of the oxyalkylene group and is any number of 1 to 180, and in the copolymer, the monomer A is one, two or more of the monomers are mixed for use;
monomer B has the structure of formula (2):
wherein R is10Represents hydrogen, methyl or a COOM group, R11Represents hydrogen, methyl or CH2A COOM group, M represents hydrogen, a monovalent metal, a divalent metal, an ammonium group or an organic amine group; in the copolymer, the monomersB is one, two or more of the components used in a mixed way;
the monomer C is hydroxyethyl acrylate, methacrylate, acrylonitrile, unsaturated sulfonic acid or salt thereof, acrylamide, hydroxymethyl acrylamide, vinyl ester or vinyl aromatic compound. In the copolymer, the monomer C is used in combination of one, two or more thereof.
The slow-release antifoaming agent is a compound represented by the general structural formula (3):
wherein: r12Represents HOOC-CH ═ CH-, HOOC-CH-CH-; w represents-COO-, -CONHCH2CH2O-；R13O represents an oxyalkylene group of 2 to 8 carbon atoms; r14Represents an alkyl group of 1 to 6 carbon atoms, and Z is any integer of 1 to 120.
The bleeding inhibitor is 2-acrylamide-2-methylpropanesulfonic acid-N, N-dimethylacrylamide.
The adsorption inhibitor is polyvinyl alcohol, the polymerization degree is 300, and the alcoholysis degree is 87% -89%.
Preferably, the polycarboxylic acid high-performance water reducing agent comprises the following components: 30 parts by weight of polycarboxylic acid superplasticizer I, 20 parts by weight of polycarboxylic acid superplasticizer II, 4 parts by weight of retarder, 0.22 part by weight of defoaming agent, 0.2 part by weight of air-entraining agent, 0.5 part by weight of bleeding inhibitor, 0.5 part by weight of adsorption inhibitor and 44.58 parts by weight of water; or the composition comprises the following components: 33 parts of polycarboxylic acid superplasticizer I, 12 parts of polycarboxylic acid superplasticizer II, 5 parts of retarder, 0.17 part of defoaming agent, 0.05 part of air-entraining agent, 1 part of bleeding inhibitor, 0.5 part of adsorption inhibitor and 48.78 parts of water.
The water reducing agent composition has a solid content of 20-40% and a water reducing rate of 10-28%.
The using and mixing amount of the polycarboxylic acid high-performance water reducing agent is 0.6-2.0% of the mass of the total cementing material in the concrete.
The application of the polycarboxylic acid high-performance water reducing agent can be suitable for preparing high-performance concrete with coarse aggregates with high water absorption.
The invention further helps solve the problems of bleeding and ineffective adsorption consumption of polycarboxylic acid when the polycarboxylic acid encounters high water absorption aggregate by utilizing the bleeding inhibitor and the adsorption inhibitor.
The coarse aggregate with high water absorption rate is easy to adsorb water molecules and high molecular polymers due to more pore structures, so that the amount of a polycarboxylic acid water reducing agent for dispersing cement can be reduced, and two polycarboxylic acid superplasticizers used in the method can respectively play roles in dispersing cement particles and maintaining the dispersing capacity; the main purpose of compounding the defoaming agent and the air entraining agent is to adjust the working performance of concrete, eliminate large bubbles caused by the introduction of a polycarboxylic acid superplasticizer and generate closed and independent micro bubbles; the retarder is selected mainly to control the setting time of the concrete; the addition of the bleeding inhibitor can effectively lock water, prevent the porous coarse aggregate from releasing water in a pore structure during construction vibration to cause a bleeding phenomenon, and contribute to improving the workability retention capacity of concrete; the-OH structure contained in the polyvinyl alcohol serving as the adsorption inhibitor is easy to adsorb on the surface of particles, and can form competitive adsorption with the polycarboxylic acid superplasticizer, so that the polycarboxylic acid superplasticizer is effectively prevented from being adsorbed into pores, and the useless consumption of the polycarboxylic acid superplasticizer is reduced. When the product is used for preparing high-performance concrete with coarse aggregate with high water absorption, the fresh concrete with good construction performance can be obtained, and the requirements on the appearance quality, the shrinkage rate and the strength of the concrete are met.
Detailed Description
In order to better understand the present invention, the following examples are further provided to illustrate the content of the present invention, but the content of the present invention is not limited to the following examples.
Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
Example 1
Weighing water 45.43kg, placing in a reaction kettle, adding sodium gluconate 4.00kg under stirring, and sequentially adding PCE-1-1 (polycarboxylic acid superplasticizer I, with specific structure of 40%) 30.00kg with solid content after completely dissolving
Example 2
Weighing 45.40kg of water, placing the water in a reaction kettle, adding 4.00kg of sodium gluconate under stirring, and sequentially adding 30.00kg of PCE-1-2 (polycarboxylic acid superplasticizer I, with specific structure as follows) with 40% of solid content after the sodium gluconate is completely dissolved
) 20.00kg of PCE-2-2 (polycarboxylic acid superplasticizer II, wherein the monomer A is isopentenol polyoxyethylene ether, the polyoxyethylene number is 55, the monomer B is maleic acid, and the monomer C is hydroxyethyl acrylate) with 40% of solid content, then 0.10kg of slow-release defoaming agent D1 and 0.50kg of bleeding inhibitor are added, and the mixture is continuously stirred uniformly to obtain the polycarboxylic acid high-performance water reducing agent composition, which is recorded as LWAC-2.
Example 3
Weighing 44.58kg of water, placing the water into a reaction kettle, adding 4.00kg of sodium gluconate under stirring, sequentially adding 30.00kg of PCE-1-1 with 40% solid content and 20.00kg of PCE-2-1 with 40% solid content after the sodium gluconate is completely dissolved, adding 0.20kg of air entraining agent, 0.22kg of defoaming agent D1, 0.50kg of bleeding inhibitor and 0.5kg of adsorption inhibitor, and continuously stirring uniformly to obtain the polycarboxylic acid high-performance water reducing agent composition, which is recorded as LWAC-3.
Example 4
Weighing 48.75kg of water, placing the water into a reaction kettle, sequentially adding 3.00kg of sodium gluconate and 2.00kg of white sugar under stirring, after completely dissolving, sequentially adding 33.00kg of PCE-1-2 with 40% of solid content and 12.00kg of PCE-2-2 with 40% of solid content, then adding 0.06kg of air entraining agent, 0.19kg of defoaming agent D1, 1.00kg of bleeding inhibitor and 0.5kg of adsorption inhibitor, and continuously stirring uniformly to obtain the polycarboxylic acid high-performance water reducing agent composition, which is marked as LWAC-4.
Example 5
Weighing 48.78kg of water, placing the water into a reaction kettle, sequentially adding 3.00kg of sodium gluconate and 2.00kg of white sugar under stirring, sequentially adding 33.00kg of PCE-1-1 with 40% of solid content and 12.00kg of PCE-2-1 with 40% of solid content after completely dissolving, then adding 0.05kg of air entraining agent Y2, 0.17kg of defoaming agent D1, 1.00kg of water bleeding inhibitor and 1.5kg of adsorption inhibitor, and continuously stirring uniformly to obtain the polycarboxylic acid high-performance water reducing agent composition, which is marked as LWAC-5.
Comparative example 1
Weighing 45kg of water, placing the water into a reaction kettle, sequentially adding 5.00kg of sodium gluconate under the stirring state, sequentially adding 30.00kg of PCE-3-1 (a commercially available water-reducing polycarboxylic acid superplasticizer) with 40% of solid content and 20.00kg of PCE-3-2 (a commercially available slump-retaining polycarboxylic acid superplasticizer) with 40% of solid content after complete dissolution, and continuously stirring uniformly to obtain the polycarboxylic acid high-performance water reducing agent composition, which is marked as PC-1.
The polycarboxylic acid high-performance water reducing agent compositions LWAC-1-LWAC-5 in the above examples, the polycarboxylic acid high-performance water reducing agent composition PC-1 in the comparative example and the polycarboxylic acid high-performance water reducing agent composition PC-2 in the market prefabricated part are blended into concrete according to the mixing proportion of the coarse aggregate concrete with high water absorption, the slump and the fluidity of the fresh concrete within 1 hour, the initial volume weight, the compression strength and the shrinkage ratio within 28d are tested, and the appearance condition after demoulding is observed by barreling and molding (70L). The cement used in the test is CMP.O.42.5, class I fly ash, natural river sand with fineness modulus of 2.7, crushed stone with 5-20mm (the water absorption of large stone is 5.03%, the water absorption of small stone is 3.46%), and C40 concrete with the mixing ratio: c: F: S: G: W: 357: 63: 738: 978: 164, wherein the ratio of large stones to small stones is 4: 1. The application performance test was carried out using the mix proportion of the coarse aggregate concrete with high water absorption, and the results are shown in table 1.
TABLE 1 application performance test results of various water reducers in coarse aggregate concrete with high water absorption
The polycarboxylate superplasticizer composition contains various hydrophilic groups, and the copolymerization proportion of small molecular groups is higher and the molecular structure is uniform, so that the product has higher water reducing rate; the water reducing agent contains ester bond molecules, and can be gradually hydrolyzed in an alkaline environment, so that the water reducing agent can be continuously adsorbed with cement in a period of time, and the slump loss of concrete can be reduced; meanwhile, the water reducing agent contains functional groups capable of reducing the surface tension of a concrete pore solution, and can reduce the negative pressure of a capillary tube so as to reduce the shrinkage stress of concrete.
From the test results it can be seen that: the polycarboxylate superplasticizer composition disclosed by the invention has good initial dispersing capacity and good slump retaining capacity, the prepared fresh concrete is good in workability and wrapping property, and the appearance of the concrete can be improved to a certain extent; compared with comparative example 1, the polycarboxylate superplasticizer composition disclosed by the invention has the advantages that the initial fluidity is not greatly different, the slump retention capacity is greatly improved, the concrete state is greatly improved, and the appearance of the concrete can be obviously improved through the blending of the bubble regulator in different proportions; compared with the prefabricated member polycarboxylate superplasticizer composition, the polycarboxylate superplasticizer composition has better initial fluidity and slump retention, and because the concrete using the commercial product has larger initial air bubbles, the wrapping property of fresh concrete is poor although the volume weight is low, slight bleeding also occurs during tamping, the appearance of hardened concrete is not good too much, the bleeding inhibitor in the composition well inhibits the release of water in the pores of the coarse aggregate with large water absorption, the absorption inhibitor effectively reduces the consumption of the polycarboxylate superplasticizer, and the working retention time of the concrete is prolonged. Therefore, the polycarboxylate superplasticizer of the invention can ensure that fresh concrete has good working performance and can meet the requirements on the appearance quality, shrinkage and strength of the concrete.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the concept of the present invention, and these modifications and decorations should also be regarded as being within the protection scope of the present invention.
Claims (9)
1. A polycarboxylic acid high-performance water reducing agent for coarse aggregates with high water absorption is characterized in that: the composite material consists of the following substances in percentage by weight:
polycarboxylic acid superplasticizer I: 4.00% -40.00%;
polycarboxylic acid superplasticizer II: 1.00% -20.00%;
defoaming agent: 0.01 to 1.00 percent;
air entraining agent: 0.00% -1.00%;
retarder: 0.05 percent to 10.00 percent;
bleeding inhibitors: 0.10% -2.00%;
adsorption inhibitor: 0.00% -2.00%;
water: 26.00-68.00%;
wherein:
the weight average molecular weight of the polycarboxylic acid superplasticizer I is 10000-120000;
the weight average molecular weight of the polycarboxylic acid superplasticizer II is 10000-120000;
the defoaming agent is a slow release defoaming agent;
the air entraining agent is sodium lauryl sulfate monoester salt;
the retarder is one or two of sodium gluconate and white sugar;
the bleeding inhibitor is 2-acrylamide-2-methylpropanesulfonic acid-N, N-dimethylacrylamide;
the adsorption inhibitor is polyvinyl alcohol.
2. The polycarboxylic acid-based high performance water reducing agent for coarse aggregates with high water absorption according to claim 1, characterized in that: the polycarboxylic acid superplasticizer I is a polycarboxylic acid superplasticizer containing the following structural general formula:
wherein R is1Represents hydrogen, methyl or a COOM group, R2Represents hydrogen, methyl or CH2COOM group, M represents hydrogen, monovalent metal, divalent metal, ammonium group or organic amine group; r3Represents hydrogen or methyl; r4O represents an oxyalkylene group of 2 to 8 carbon atoms; r5Represents hydrogen or alkyl of 1 to 6 carbon atoms; n and m are any integers not equal to zero; q represents the number of methylene groups and is an integer of 0 to 2; k represents an average molar number of addition of the oxyalkylene group and is an arbitrary number of 1 to 180.
3. The polycarboxylic acid-based high performance water reducing agent for coarse aggregates with high water absorption according to claim 1, characterized in that: the polycarboxylic acid superplasticizer II is obtained by copolymerizing 5-92% of monomer A, 8-95% of monomer B and 0-30% of monomer C by mass percent, wherein the monomer A has a structure of a general formula (1):
wherein R is6Represents hydrogen, methyl or a-COOM group, R7Represents hydrogen, methyl or-CH2COOM group, M represents hydrogen, monovalent metal, divalent metal, ammonium group or organic amine group; r8O represents an oxyalkylene group of 2 to 8 carbon atoms; r9Represents hydrogen or alkyl of 1 to 6 carbon atoms; x represents the number of methylene groups and is an integer of 0-2; y represents the average molar number of addition of the oxyalkylene group and is any number of 1 to 180, and in the copolymer, the monomer A is one, two or more of the monomers are mixed for use;
monomer B has the structure of formula (2):
wherein R is10Represents hydrogen, methyl or a COOM group, R11Represents hydrogen, methyl or CH2A COOM group, M represents hydrogen, a monovalent metal, a divalent metal, an ammonium group or an organic amine group; in the copolymer, the monomer B is one, two or more of the monomers;
the monomer C is acrylate, methacrylate, acrylonitrile, unsaturated sulfonic acid or salt thereof, acrylamide, hydroxymethyl acrylamide, vinyl ester and vinyl aromatic compound; in the copolymer, the monomer C is used in combination of one, two or more thereof.
4. The polycarboxylic acid-based high performance water reducing agent for coarse aggregates with high water absorption according to claim 1, characterized in that: the slow-release antifoaming agent is a compound represented by the general structural formula (3):
wherein: r12Represents HOOC-CH ═ CH-or HOOC-CH-; w represents-COO-or-CONHCH2CH2O-；R13O represents an oxyalkylene group of 2 to 8 carbon atoms; r14Represents an alkyl group of 1 to 6 carbon atoms, and Z is any integer of 1 to 120.
5. The polycarboxylic acid-based high performance water reducing agent for coarse aggregates with high water absorption according to claim 1, characterized in that: the polymerization degree of the polyvinyl alcohol is 300, and the alcoholysis degree of the polyvinyl alcohol is 87% -89%.
6. The polycarboxylic acid-based high performance water reducing agent for coarse aggregates with high water absorption according to claim 1, characterized in that: the using and mixing amount of the polycarboxylate superplasticizer is 0.6-2.0% of the mass of the total cementing material in the concrete.
7. The polycarboxylic acid-based high performance water reducing agent for coarse aggregates with high water absorption according to claim 1, characterized in that: the solid content of the water reducing agent is 20-40%.
8. The method for preparing the polycarboxylic acid-based high-performance water reducing agent for coarse aggregates with high water absorption according to claim 1, characterized in that: the method comprises the following steps: weighing water, placing the water in a reaction kettle, adding sodium gluconate under a stirring state, sequentially adding a polycarboxylic acid superplasticizer I and a polycarboxylic acid superplasticizer II after the sodium gluconate is completely dissolved, adding a slow-release antifoaming agent and a bleeding inhibitor, and continuously stirring uniformly to obtain the polycarboxylic acid high-performance water reducing agent for the coarse aggregate with high water absorption.
9. The use of the polycarboxylic acid-based high-performance water reducer for coarse aggregates with high water absorption according to claim 1 for preparing high-performance concrete with coarse aggregates with high water absorption.
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| CN102718430A (en) * | 2012-06-29 | 2012-10-10 | 山东华伟银凯建材科技股份有限公司 | Mud content inhibitor for concrete doped with polycarboxylic acid type water reducer and preparation method and application method of mud content inhibitor |
| CN103664052A (en) * | 2013-11-29 | 2014-03-26 | 上海三瑞高分子材料有限公司 | Polycarboxylate superplasticizer for machine-made sand concrete |
| CN106746839A (en) * | 2016-12-22 | 2017-05-31 | 上海三瑞高分子材料股份有限公司 | A kind of polycarboxylate high performance water-reducing agent composition and application thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102718430A (en) * | 2012-06-29 | 2012-10-10 | 山东华伟银凯建材科技股份有限公司 | Mud content inhibitor for concrete doped with polycarboxylic acid type water reducer and preparation method and application method of mud content inhibitor |
| CN103664052A (en) * | 2013-11-29 | 2014-03-26 | 上海三瑞高分子材料有限公司 | Polycarboxylate superplasticizer for machine-made sand concrete |
| CN106746839A (en) * | 2016-12-22 | 2017-05-31 | 上海三瑞高分子材料股份有限公司 | A kind of polycarboxylate high performance water-reducing agent composition and application thereof |
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Application publication date: 20200908 |