Polymer-based concrete sand regulator and method for preparing the same

Abstract

The present application relates to the technical field of building materials, and particularly relates to a polymer concrete sand regulator and a preparation method thereof. The polymer concrete sand regulator comprises 40-70 parts of polyurethane emulsion, 3-5 parts of polyvinyl alcohol, 1-3 parts of polycarboxylic acid cellulose, 3-8 parts of calcium silicate, 1-4 parts of limestone powder and 40-80 parts of water. The preparation method comprises the following steps: adding the polycarboxylic acid cellulose, the calcium silicate and the limestone powder into water, uniformly stirring to obtain a mixed solution; then adding the polyvinyl alcohol into the mixed solution, heating to 95-98 DEG C, cooling to room temperature after the polyvinyl alcohol is completely dissolved to obtain an intermediate solution; and then adding the polyurethane emulsion into the intermediate solution, uniformly mixing to obtain the polymer concrete sand regulator. The present application can reduce the sand rate of concrete and enhance the compressive strength of concrete, so that the amount of sand in the concrete can be reduced.

Description

Technical Field

[0001] This invention relates to the technical field of building materials, and in particular to a polymer-based concrete aggregate modifier and its preparation method. Background Technology

[0002] Concrete is a widely used basic building material in the current construction industry, primarily used to construct the main structure of buildings. In related technologies, concrete uses cement as a binder, sand and gravel as aggregates, and is mixed with water, admixtures, and additives in a specific ratio. Sand is generally used as the fine aggregate, while gravel is used as the coarse aggregate. The sand and binder paste form mortar, which fills the pores between the gravel and coats the surface of the gravel, reducing friction between them and thus improving the fluidity of the concrete. In addition, mortar can improve the cohesiveness and water retention of concrete, and after the concrete has set, it can also increase its strength.

[0003] Because natural sand resources are finite and are decreasing with the development of the construction industry, although more and more construction companies are using manufactured sand to replace natural sand, manufactured sand often contains stone powder, meaning it cannot completely replace natural sand. Therefore, it is necessary to reduce the amount of sand used in concrete while still ensuring that the concrete has high compressive strength, in order to conserve natural sand resources. Summary of the Invention

[0004] In order to reduce the amount of sand in concrete and maintain the compressive strength of concrete, this application provides a polymer-based concrete aggregate modifier and its preparation method.

[0005] In a first aspect, this application provides a polymer-based concrete aggregate modifier, employing the following technical solution:

[0006] A polymer-based concrete aggregate modifier comprises the following components in parts by weight: 40-70 parts polyurethane emulsion, 3-5 parts polyvinyl alcohol, 1-3 parts polycarboxylate cellulose, 3-8 parts calcium silicate, 1-4 parts limestone powder, and 40-80 parts water.

[0007] By adopting the above technical solution, polyvinyl alcohol dissolved in water in concrete can improve the cohesiveness of mortar. Polyurethane emulsion not only forms a stable polymer film with water in concrete but also improves the fluidity of mortar. Therefore, under the synergistic effect of polyvinyl alcohol and polyurethane emulsion, the lubricity and coating effect of mortar can be improved. Even with a reduced amount of mortar coating on the surface of the stones, it can still achieve the effects of reducing friction between stones and improving the fluidity and cohesiveness of concrete. Furthermore, since this application also incorporates polycarboxylic acid cellulose, calcium silicate, and limestone powder, calcium silicate can react with calcium hydroxide in concrete to generate water-insoluble tricalcium silicate. Tricalcium silicate can fill the pores between stones, reducing the porosity of concrete. Limestone powder, mainly composed of carbonates, can not only fill the tiny pores between stones but also increase the adhesion of mortar, forming a tight bond between sand and stones, thus improving the compressive strength of concrete. Polycarboxylic acid cellulose can reduce bleeding in concrete, thereby reducing the problem of water separation in concrete due to a reduced sand ratio. Therefore, by combining the above five components, this application can reduce the sand ratio of concrete while enhancing the compressive strength of concrete, thereby reducing the amount of sand used in concrete.

[0008] In one specific implementation, the solid content of the polyurethane emulsion is 10%-20%.

[0009] By adopting the above technical solution, since polyurethane emulsions also have viscosity, when the solid content of the polyurethane emulsion is too high, it will not only lead to excessive viscosity and reduced fluidity of the mortar, thus reducing the workability and workability of the concrete, but it will also make it difficult to disperse polycarboxylate cellulose, calcium silicate, and limestone powder in the polyurethane emulsion. Under the above component ratio, selecting a polyurethane emulsion with a solid content of 10%-20% can make the concrete have better workability and workability.

[0010] In one specific feasible implementation, the calcium silicate and limestone powder are both 800-1000 mesh.

[0011] By adopting the above technical solution, calcium silicate and limestone powder with particle size within the above range can not only be well dispersed in polyurethane emulsion with a solid content of 10%-20%, but also fill the tiny pores between the stones, reducing the porosity of the concrete.

[0012] In one specific implementation, the polymeric concrete aggregate modifier further includes 5-10 parts by weight of polyvinyl alcohol ester.

[0013] By adopting the above technical solution, polyvinyl alcohol ester can form tiny, stable polymer bubbles with the moisture in concrete. These tiny polymer bubbles can improve the lubricity of mortar. After the concrete solidifies, the polymer bubbles act as air cushions in the concrete, thereby giving the concrete good compressive strength.

[0014] In one specific implementation, the polyvinyl alcohol ester is polyethylene glycol diacrylate.

[0015] By adopting the above technical solution, polyethylene glycol diacrylate can not only form stable small bubbles, but also has a certain degree of elasticity, which helps to reduce the formation of micro-cracks in concrete under pressure, thereby improving the durability of concrete.

[0016] In one specific implementation, the polymer-based concrete aggregate modifier further includes 1-3 parts by weight of latex.

[0017] By adopting the above technical solution, when polymer-based concrete aggregate modifiers are applied to alkaline concrete, polyvinyl alcohol can react with alkaline cement, causing polyvinyl alcohol to lose its viscosity, thereby reducing the cohesiveness of the mortar. Therefore, this application adds latex, which can still enhance the cohesiveness of the mortar in alkaline concrete, so that the polymer-based concrete aggregate modifier of this application can also play a good role in alkaline concrete.

[0018] In one specific implementation, the latex is a liquid carboxylated styrene-butadiene latex with a solid content of 30%-50%.

[0019] By adopting the above technical solution, carboxylated styrene-butadiene latex and polyurethane emulsion have good compatibility. In alkaline concrete, it can improve the cohesiveness of mortar. Carboxylated styrene-butadiene latex also has anti-foaming properties, which helps to promote the rupture of unstable large air bubbles in mortar, thereby forming more stable small air bubbles, improving the lubricity of mortar and the compressive strength of concrete.

[0020] Secondly, this application provides a method for preparing a polymer-based concrete aggregate modifier, employing the following technical solution:

[0021] A method for preparing a polymer-based concrete aggregate modifier includes the following steps:

[0022] Polycarboxylic acid cellulose, calcium silicate and limestone powder are added to water and stirred evenly to obtain a mixture.

[0023] Then add polyvinyl alcohol to the mixture, heat to 95-98℃, and after the polyvinyl alcohol is completely dissolved, cool to room temperature to obtain the intermediate liquid;

[0024] Then, the polyurethane emulsion is added to the intermediate liquid and mixed evenly to obtain a polymer-based concrete aggregate modifier.

[0025] By adopting the above technical solution, the components are evenly dispersed, which also helps the polyvinyl alcohol and polyurethane emulsion to be compatible, thereby improving the uniformity of the sand and gravel conditioner.

[0026] In one specific feasible implementation, polyvinyl ester and polyvinyl alcohol are added to the mixture simultaneously.

[0027] In one specific feasible implementation, the latex and polyurethane emulsion are added to the intermediate liquid simultaneously.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. This application uses five components—polyurethane emulsion, polyvinyl alcohol, polycarboxylic acid cellulose, silicate, and limestone powder—to work together to reduce the sand ratio in concrete while enhancing its compressive strength, thereby reducing the amount of sand used in the concrete.

[0030] 2. This application also incorporates polyvinyl alcohol ester, which can form tiny, stable polymer bubbles with moisture in concrete, thereby improving the lubricity of the mortar and the compressive strength of the concrete;

[0031] 3. This application also incorporates latex, which can still enhance the cohesiveness of mortar in alkaline concrete, enabling the polymer-based concrete aggregate modifier of this application to also achieve good results in alkaline concrete. Detailed Implementation

[0032] The present application will be further described in detail below with reference to the embodiments.

[0033] Example

[0034] Example 1

[0035] This embodiment provides a polymer-based concrete aggregate conditioner, comprising the following components: 55 kg of polyurethane emulsion with a solid content of 15%, 4 kg of polyvinyl alcohol with brand name gtu-5e3, 2 kg of JS-CMC polycarboxylate cellulose, 5.5 kg of calcium silicate with a mesh size of 800-1000, 2.5 kg of limestone powder with a mesh size of 800-1000, and 60 kg of water.

[0036] This embodiment also provides a method for preparing a polymer-based concrete aggregate modifier, comprising the following steps:

[0037] Following the above proportions, polycarboxylic acid cellulose, calcium silicate, and limestone powder are added to water under stirring until homogeneous, yielding a mixture. Polyvinyl alcohol is then added to the mixture, heated to 96°C, maintained at this temperature with continuous stirring, and allowed to cool naturally to room temperature after the polyvinyl alcohol is completely dissolved, yielding an intermediate liquid. Polyurethane emulsion is then added to the intermediate liquid and stirred until homogeneous, resulting in a polymer-based concrete aggregate modifier.

[0038] Example 2

[0039] This embodiment provides a polymer-based concrete aggregate conditioner. The difference between this embodiment and Embodiment 1 is that the polymer-based concrete aggregate conditioner includes the following components: 40 kg of polyurethane emulsion with a solid content of 15%, 3 kg of polyvinyl alcohol with brand name gtu-5e3, 1 kg of JS-CMC polycarboxylate cellulose, 3 kg of 800-1000 mesh calcium silicate, 1 kg of 800-1000 mesh limestone powder, and 40 kg of water.

[0040] Example 3

[0041] This embodiment provides a polymer-based concrete aggregate conditioner. The difference between this embodiment and Embodiment 1 is that the polymer-based concrete aggregate conditioner includes the following components: 70 kg of polyurethane emulsion with a solid content of 15%, 5 kg of polyvinyl alcohol with brand name gtu-5e3, 3 kg of JS-CMC polycarboxylate cellulose, 8 kg of 800-1000 mesh calcium silicate, 4 kg of 800-1000 mesh limestone powder, and 80 kg of water.

[0042] Example 4

[0043] This embodiment provides a polymer-based concrete aggregate modifier. The difference between this embodiment and Embodiment 1 is that an equal amount of polyurethane emulsion with a solid content of 10% is used to replace the polyurethane emulsion with a solid content of 15%.

[0044] Example 5

[0045] This embodiment provides a polymer-based concrete aggregate modifier. The difference between this embodiment and Embodiment 1 is that an equal amount of polyurethane emulsion with a solid content of 20% is used to replace the polyurethane emulsion with a solid content of 15%.

[0046] Example 6

[0047] This embodiment provides a polymer-based concrete aggregate modifier. The difference between this embodiment and Embodiment 1 is that the polymer-based concrete aggregate modifier further includes 7.5 kg of polyethylene glycol diacrylate. This embodiment also provides a method for preparing the polymer-based concrete aggregate modifier, comprising the following steps:

[0048] Following the above proportions, polycarboxylate cellulose, calcium silicate, and limestone powder are added to water under stirring until homogeneous, yielding a mixture. Polyethylene glycol diacrylate and polyvinyl alcohol are then added to the mixture, heated to 96°C, maintained at this temperature with continuous stirring, until the polyethylene glycol diacrylate and polyvinyl alcohol are completely dissolved. The mixture is then allowed to cool naturally to room temperature, yielding an intermediate solution. Polyurethane emulsion is then added to the intermediate solution and stirred until homogeneous, resulting in a polymer-based concrete aggregate modifier.

[0049] Example 7

[0050] This embodiment provides a polymer-based concrete aggregate modifier. The difference between this embodiment and Embodiment 6 is that the polymer-based concrete aggregate modifier also includes 5 kg of polyethylene glycol diacrylate.

[0051] Example 8

[0052] This embodiment provides a polymer-based concrete aggregate conditioner. The difference between this embodiment and Embodiment 6 is that the polymer-based concrete aggregate conditioner also includes 10 kg of polyethylene glycol diacrylate.

[0053] Example 9

[0054] This embodiment provides a polymer-based concrete aggregate conditioner. The difference between this embodiment and Embodiment 1 is that the polymer-based concrete aggregate conditioner also includes 2 kg of liquid carboxylated styrene-butadiene latex with a solid content of 40%.

[0055] This embodiment also provides a method for preparing a polymer-based concrete aggregate modifier, comprising the following steps:

[0056] Following the above proportions, polycarboxylic acid cellulose, calcium silicate, and limestone powder are added to water under stirring until homogeneous, yielding a mixture. Polyvinyl alcohol is then added to the mixture, heated to 96°C, maintained at this temperature with continuous stirring, and allowed to cool naturally to room temperature after complete dissolution, yielding an intermediate solution. Liquid carboxylated styrene-butadiene latex and polyurethane emulsion are then added to the intermediate solution and stirred until homogeneous, resulting in a polymer-based concrete aggregate modifier.

[0057] Example 10

[0058] This embodiment provides a polymer-based concrete aggregate conditioner. The difference between this embodiment and Embodiment 9 is that the polymer-based concrete aggregate conditioner also includes 1 kg of liquid carboxylated styrene-butadiene latex with a solid content of 40%.

[0059] Example 11

[0060] This embodiment provides a polymer-based concrete aggregate conditioner. The difference between this embodiment and Embodiment 9 is that the polymer-based concrete aggregate conditioner also includes 3 kg of liquid carboxylated styrene-butadiene latex with a solid content of 40%.

[0061] Example 12

[0062] This embodiment provides a polymer-based concrete aggregate conditioner. The difference between this embodiment and Embodiment 1 is that the polymer-based concrete aggregate conditioner also includes 2 kg of liquid carboxylated styrene-butadiene latex with a solid content of 30%.

[0063] Example 13

[0064] This embodiment provides a polymer-based concrete aggregate conditioner. The difference between this embodiment and Embodiment 1 is that the polymer-based concrete aggregate conditioner also includes 2 kg of liquid carboxylated styrene-butadiene latex with a solid content of 50%.

[0065] Example 14

[0066] This embodiment provides a polymer-based concrete aggregate modifier. The difference between this embodiment and Embodiment 6 is that an equal amount of polyvinyl alcohol cinnamate is used to replace polyethylene glycol diacrylate.

[0067] Example 15

[0068] This embodiment provides a polymer-based concrete aggregate modifier. The difference between this embodiment and Embodiment 9 is that an equal amount of natural latex with a solid content of 40% is used to replace liquid carboxylated styrene-butadiene latex with a solid content of 40%.

[0069] Example 16

[0070] This embodiment provides a polymer-based concrete aggregate conditioner. The difference between this embodiment and Embodiment 6 is that the polymer-based concrete aggregate conditioner also includes 2 kg of liquid carboxylated styrene-butadiene latex with a solid content of 40%.

[0071] This embodiment also provides a method for preparing a polymer-based concrete aggregate modifier, comprising the following steps:

[0072] Following the above proportions, polycarboxylic acid cellulose, calcium silicate, and limestone powder are added to water under stirring until homogeneous, yielding a mixture. Polyethylene glycol diacrylate and polyvinyl alcohol are then added to the mixture, heated to 96°C, maintained at this temperature with continuous stirring, until the polyethylene glycol diacrylate and polyvinyl alcohol are completely dissolved. The mixture is then allowed to cool naturally to room temperature, yielding an intermediate solution. Liquid carboxylated styrene-butadiene latex and polyurethane emulsion are then added to the intermediate solution and stirred until homogeneous, resulting in a polymer-based concrete aggregate modifier.

[0073] Comparative Example

[0074] Comparative Example 1

[0075] This comparative example provides a sand and gravel conditioner comprising the following components: 4 kg of polyvinyl alcohol (GTU-5E3), 2 kg of JS-CMC polycarboxylate cellulose, 5.5 kg of 800-1000 mesh calcium silicate, 2.5 kg of 800-1000 mesh limestone powder, and 60 kg of water.

[0076] This comparative example also provides a method for preparing a sand and gravel conditioner, comprising the following steps:

[0077] Following the above proportions, polycarboxylic acid cellulose, calcium silicate, and limestone powder are added to water under stirring. The mixture is stirred continuously until homogeneous, yielding a final solution. Polyvinyl alcohol is then added to the solution, heated to 96°C, kept at this temperature, and continuously stirred until the polyvinyl alcohol is completely dissolved. The solution is then allowed to cool naturally to room temperature, yielding the sand and gravel conditioner.

[0078] Comparative Example 2

[0079] This comparative example provides a sand and gravel conditioner comprising the following components: 55 kg of polyurethane emulsion with a solid content of 15%, 2 kg of JS-CMC polycarboxylate cellulose, 5.5 kg of 800-1000 mesh calcium silicate, 2.5 kg of 800-1000 mesh limestone powder, and 60 kg of water.

[0080] This comparative example also provides a method for preparing a sand and gravel conditioner, comprising the following steps:

[0081] Following the above proportions, polycarboxylate cellulose, calcium silicate, and limestone powder are added to water while stirring. The mixture is stirred continuously until homogeneous, yielding a final product. Then, polyurethane emulsion is added to the final product and stirred until homogeneous, resulting in a sand and gravel modifier.

[0082] Comparative Example 3

[0083] This comparative example provides a sand and gravel conditioner comprising the following components: 55 kg of polyurethane emulsion with a solid content of 15%, 4 kg of polyvinyl alcohol of grade GTU-5E3, 5.5 kg of calcium silicate of 800-1000 mesh, 2.5 kg of limestone powder of 800-1000 mesh, and 60 kg of water.

[0084] This comparative example also provides a method for preparing a sand and gravel conditioner, comprising the following steps:

[0085] Following the above proportions, calcium silicate and limestone powder are added to water under stirring until homogeneous, yielding a mixture. Polyvinyl alcohol is then added to the mixture, heated to 96°C, kept at this temperature with continuous stirring, and allowed to cool naturally to room temperature after the polyvinyl alcohol is completely dissolved, yielding an intermediate solution. Polyurethane emulsion is then added to the intermediate solution and stirred until homogeneous, yielding the sand and gravel conditioner.

[0086] Comparative Example 4

[0087] This comparative example provides a sand and gravel conditioner comprising the following components: 55 kg of polyurethane emulsion with a solid content of 15%, 4 kg of polyvinyl alcohol of grade GTU-5E3, 2 kg of JS-CMC polycarboxylate cellulose, 2.5 kg of limestone powder of 800-1000 mesh, and 60 kg of water.

[0088] This comparative example also provides a method for preparing a sand and gravel conditioner, comprising the following steps:

[0089] Following the above proportions, polycarboxylate cellulose and limestone powder are added to water under stirring until homogeneous, yielding a mixture. Polyvinyl alcohol is then added to the mixture, heated to 96°C, maintained at this temperature with continuous stirring, and allowed to cool naturally to room temperature after complete dissolution, yielding an intermediate solution. Polyurethane emulsion is then added to the intermediate solution and stirred until homogeneous, resulting in a sand and gravel modifier.

[0090] Comparative Example 5

[0091] This comparative example provides a sand and gravel conditioner comprising the following components: 55 kg of polyurethane emulsion with a solid content of 15%, 4 kg of polyvinyl alcohol of grade GTU-5E3, 2 kg of JS-CMC polycarboxylate cellulose, 5.5 kg of calcium silicate of 800-1000 mesh, and 60 kg of water.

[0092] This comparative example also provides a method for preparing a sand and gravel conditioner, comprising the following steps:

[0093] Following the above proportions, polycarboxylic acid cellulose and calcium silicate are added to water under stirring until homogeneous, yielding a mixture. Polyvinyl alcohol is then added to the mixture, heated to 96°C, kept at this temperature with continuous stirring, and allowed to cool naturally to room temperature after the polyvinyl alcohol is completely dissolved, yielding an intermediate liquid. Polyurethane emulsion is then added to the intermediate liquid and stirred until homogeneous, resulting in a polymer-based concrete aggregate modifier.

[0094] Application examples

[0095] Application Example 1

[0096] This application example provides a concrete with the following raw material composition: 220 kg of cement, 100 kg of fly ash, 200 kg of water, 600 kg of sand, 900 kg of gravel, and 1 kg of the sand and gravel modifier from Example 1.

[0097] Application Example 2-16

[0098] Application Examples 2-16 all provide a type of concrete. The difference between Application Examples 2-16 and Example 1 is that the sand and gravel modifier of Example 1 is replaced with an equal amount of the sand and gravel modifier of Example 2-16 in turn.

[0099] Application Comparative Example 1

[0100] Comparative Example 1 provides a concrete with the following raw material composition: 220 kg of cement, 100 kg of fly ash, 200 kg of water, 800 kg of sand, 900 kg of gravel, and 1 kg of the sand and gravel modifier from Comparative Example 1.

[0101] Application Comparative Examples 2-5

[0102] Comparative Examples 2-5 all provide a type of concrete. The difference between Comparative Examples 2-5 and Example 1 is that the sand and gravel modifier of Comparative Example 1 is replaced with an equal amount of the sand and gravel modifier of Comparative Examples 2-5 in turn.

[0103] Performance testing

[0104] The sand ratio of concrete in Application Examples 1-16 and Comparative Examples 1-5 was calculated, and the compressive strength of the concrete was tested. The results are shown in Table 1.

[0105] Table 1

[0106] Group Sand ratio / % 28-day compressive strength Application Example 1 40 57.7 Application Example 2 40 57.1 Application Example 3 40 57.8 Application Example 4 40 57.2 Application Example 5 40 58.3 Application Example 6 40 59.8 Application Example 7 40 59.2 Application Example 8 40 60.1 Application Example 9 40 60.9 Application Example 10 40 60.6 Application Example 11 40 60.4 Application Example 12 40 59.6 Application Example 13 40 61.1 Application Example 14 40 59.2 Application Example 15 40 60.2 Application Example 16 40 63.9 Application Comparative Example 1 47.1 51.6 Application Comparative Example 2 47.1 53.4 Application Comparative Example 3 47.1 55.6 Application Comparative Example 4 47.1 54.5 Application Comparative Example 5 47.1 55.6

[0107] Combining Application Example 1 and Comparative Examples 1-5 with Table 1, it can be seen that, compared with the concrete in Application Example 1, the concrete in Comparative Examples 1-5 has a higher sand ratio but lower compressive strength. This indicates that the sand and gravel modifier in Example 1 of this application can reduce the sand ratio of concrete and increase its strength.

[0108] As can be seen from Application Examples 1-16 and Table 1, the concrete in Application Examples 1-16 all exhibited high compressive strength under the same sand ratio. Furthermore, the concrete with added polyethylene glycol diacrylate, polyvinyl alcohol cinnamate, liquid carboxylated styrene-butadiene latex, or natural latex showed even higher compressive strength. This indicates that adding sand modifiers such as polyethylene glycol diacrylate, polyvinyl alcohol cinnamate, liquid carboxylated styrene-butadiene latex, or natural latex can further reduce the sand ratio of concrete and improve its strength.

[0109] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A polymer-based concrete sand regulator, characterized by, The polyurethane emulsion, the polyvinyl alcohol, the polycarboxylic cellulose, the calcium silicate, the limestone powder and the water are mixed to obtain the polymeric concrete sand regulator. The solid content of the polyurethane emulsion is 10%-20%. The polymeric concrete sand regulator further comprises 5-10 parts by weight of polyvinyl alcohol acid ester. The polyvinyl alcohol acid ester is polyethylene glycol diacrylate. The polymeric concrete sand regulator further comprises 1-3 parts by weight of latex. The latex is liquid carboxyl styrene-butadiene latex with a solid content of 30%-50%.

2. The polymer-based concrete sand regulator according to claim 1, characterized in that: The fineness of the calcium silicate and the limestone powder is 800-1000 mesh.

3. A method for producing the polymer-based concrete sand regulator as claimed in claim 1 or 2, characterized by, The method comprises the following steps: The polycarboxylic cellulose, the calcium silicate and the limestone powder are added into water and stirred to obtain a mixture; The polyvinyl alcohol is added into the mixture and heated to 95-98℃, and then cooled to room temperature to obtain an intermediate liquid; The polyurethane emulsion is added into the intermediate liquid and stirred to obtain the polymeric concrete sand regulator.

4. The method of claim 3, wherein the polymer-based concrete sand regulator is prepared by the steps of: a) mixing the polymer-based concrete sand regulator with water to form a mixture; b) adding the mixture to the concrete; and c) curing the concrete. The polyvinyl alcohol acid ester and the polyvinyl alcohol are synchronously added into the mixture.

5. The method of claim 4, wherein the polymer-based concrete sand regulator is prepared by the steps of: a) mixing the polymer-based concrete sand regulator with water to form a mixture; b) adding the mixture to the concrete; and c) curing the concrete. The latex and the polyurethane emulsion are synchronously added into the intermediate liquid.