Enhanced concrete water-retaining slurry-improving agent and preparation method thereof

Abstract

The invention relates to the technical field of concrete admixtures, in particular to an enhanced concrete water-retaining slurry-purifying agent and a preparation method thereof, the enhanced concrete water-retaining slurry-purifying agent comprises the following raw materials by weight: 0.5-55 parts of a slurry-purifying component, 0.5-50 parts of an enhancing component, 0.5-15 parts of a water-retaining component, 0.5-5 parts of a leveling component, 0.5-5 parts of a preservative and 0.5-10 parts of a calcium-magnesium complexing agent; wherein the slurry extracting component comprises any one or more of a surfactant, a dispersing agent, organic salt, water reducing agent powder and polyhydric alcohol; the enhancing component comprises any one or more of organic salt and inorganic salt; the water retention component comprises any one or more of polyvinyl alcohol, polyethylene glycol and polyacrylamide. Through the synergistic effect of multiple components, breakthrough is achieved in the three dimensions of slurry extraction, water retention and enhancement, the long-standing technical problems that water retention must be weak and slurry extraction is prone to separation in the industry are solved, and the water-retaining agent is suitable for the scenes of cast-in-place, prefabrication, super high-rise pumping and the like and has remarkable engineering application value.

Description

Technical Field

[0001] This invention relates to the field of concrete admixtures, and in particular to a reinforced concrete water-retaining and slurry-enhancing agent and its preparation method. Background Technology

[0002] As overseas infrastructure projects continue to expand, the growth rate of concrete demand far exceeds that in China. However, due to limitations in transportation and production technology, regions like Asia, Africa, and Latin America can only rely on local resources within a 100 km radius for concrete raw materials. This results in the forced use of large quantities of substandard cement, fly ash, and aggregates. These materials generally suffer from low activity, poor gradation, and high mud content, severely restricting the workability and durability of concrete. Compared to the mature domestic processes where admixtures can be used to meet design strength requirements, overseas projects face far more severe technical challenges. The material defects are prominent: the crushing value and strength index of local sand and gravel are far below the national standard requirements, and the activity of cementitious materials is insufficient, resulting in poor coating of concrete paste and weak bonding at the aggregate interface. Workability control is difficult: When using conventional water-reducing agents, concrete is prone to becoming lean. Even a slight increase in the dosage can cause bleeding, slurry bleeding, bottoming out, or segregation, and the slump loss accelerates rapidly. Insufficient strength development: Due to poor synergistic effect between slurry and aggregate, the 28-day compressive strength is generally lower than the design value, which seriously affects structural safety.

[0003] To address the aforementioned issues, existing slurry enhancers on the market primarily increase the workability of concrete by increasing the slurry content in the concrete system. However, these products suffer from drawbacks such as complex synthesis processes, high environmental risks, or limited functionality. For example, patent CN 119707352A uses urea-assisted cellulose ether grafting modification to prepare a slurry enhancer, which can improve saturation, but requires the use of the toxic and hazardous chemical N,N-methylenebisacrylamide. Furthermore, the synthesis process involves multiple heating reactions, making it cumbersome and posing safety hazards. In addition, this product only enhances slurry quality and cannot compensate for strength loss. Patent CN 118496411A uses a fly ash modification route to synthesize an ultra-high-performance slurry enhancer via mechanochemical methods. However, it relies on high-speed shear emulsification equipment, and the modification process damages the fly ash microsphere structure, leading to waste of active components, high costs, and failure to address the strength enhancement requirement.

[0004] It is evident that existing slurry enhancers cannot simultaneously achieve multiple functions such as slurry thickening, water retention and slump stabilization, and interface enhancement. Furthermore, the synthesis process involves hazardous chemicals, high-energy-consuming equipment, or complex reaction steps, making it difficult to adapt to the rudimentary production conditions of overseas construction sites. Modified raw materials or processes result in high prices for the final product, which also contradicts the low-cost demands of overseas projects.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide an enhanced concrete water-retaining and slurry-enhancing agent, which aims to solve the problems that existing slurry-enhancing agents cannot simultaneously achieve multiple functions such as slurry thickening, water retention and slump stabilization and interface enhancement, and the synthesis process involves hazardous chemicals, high-energy-consuming equipment or complex reaction steps, making it difficult to adapt to the rudimentary production conditions of overseas construction sites.

[0007] In a first aspect, the present invention provides an enhanced concrete water-retaining and slurry-raising agent, comprising the following raw materials in parts by weight: The slurry-enhancing component is 0.5-55 parts, the reinforcing component is 0.5-50 parts, the water-retaining component is 0.5-15 parts, the leveling component is 0.5-5 parts, the preservative is 0.5-5 parts, and the calcium-magnesium complexing agent is 0.5-10 parts. The pulping component comprises the following raw materials in parts by weight: 0.5-40 parts surfactant, 0.5-5 parts dispersant, 0.5-40 parts organic salt, 0.5-20 parts water-reducing agent powder, and 0.5-5 parts polyol; The reinforcing component comprises the following raw materials in parts by weight: 0.5-55 parts of organic salt and 0.5-55 parts of inorganic salt; The water-retaining component comprises the following raw materials in parts by weight: 0.5-25 parts of polyvinyl alcohol, 20-40 parts of polyethylene glycol, and 0.5-50 parts of polyacrylamide.

[0008] After water is added to concrete, cementitious materials such as cement begin to hydrate rapidly. The hydration products are highly correlated with the content and composition of active substances, especially tricalcium silicate (C3S) and tricalcium aluminate (C3A). These two minerals mainly provide early strength to concrete. However, when the sand and gravel materials have a high mud content, the layered silicate minerals in the soil will preferentially adsorb hydration products and water-reducing agents. At the same time, manufactured sand with a high powder content will also adsorb hydration minerals and water-reducing agents due to its particle size, resulting in insufficient concrete paste. Increasing the amount of water to increase the paste volume will lead to lower strength, while increasing the amount of water-reducing agent will increase costs. In concrete admixtures, water-retaining materials are generally high molecular weight compounds, which will reduce the splitting tensile strength of concrete when applied to concrete; while paste-enhancing materials are generally surfactants, especially hydrophilic ones, which will also lead to lower strength and reduce the surface tension of the aqueous solution in the concrete paste, thereby reducing the cohesiveness of the concrete.

[0009] The enhanced concrete water-retaining and slurry-enhancing agent of the present invention comprises a slurry-enhancing component, a reinforcing component, a water-retaining component, a leveling component, a corrosion inhibitor, and a calcium-magnesium complexing agent. The slurry-enhancing component includes surfactants, dispersants, organic salts, water-reducing agent powder, and polyols. The reinforcing component includes organic salts and inorganic salts. The water-retaining component includes polyvinyl alcohol, polyethylene glycol, and polyacrylamide. When the enhanced water-retaining and slurry-enhancing agent of this application is added to concrete, the surfactants preferentially adsorb onto the particle surface due to electrostatic adsorption, thereby enhancing the working performance of the water-reducing agent and increasing the slurry volume. Simultaneously, the water-retaining component hydrolyzes in the slurry solution, releasing colloidal substances, increasing the surface tension of the solution, increasing the viscosity of the slurry, and allowing the slurry to adhere uniformly to the surface of the sand and gravel aggregates, thereby improving workability. The reinforcing components in the slurry enhancer, in synergy with the calcium-magnesium complexing agent, can stimulate dicalcium silicate (C2S) and tetracalcium aluminoferrite (C4AF) in cement and other binders, enabling them to undergo hydration at a lower water-cement ratio and within a shorter time (3 days). This increases the hydration products of the system. Furthermore, the selective complexation of cations by the calcium-magnesium complexing agent in the slurry enhancer ensures continuous and uniform hydration of the system's minerals, thereby leading to a sustained increase in concrete strength. Therefore, this invention achieves breakthroughs in slurry enhancement, water retention, and reinforcement through the synergistic effect of multiple components, solving the long-standing technical problem in the industry of "weak water retention and easy separation of slurry," and has significant engineering application value.

[0010] As a preferred embodiment of this technical solution, in the pulping component of this invention, The surfactant includes any one or more of sodium dodecyl sulfate, sodium dodecyl sulfonate, and triterpenoid saponins; The dispersant includes any one or more of sodium stearate, magnesium stearate, and calcium stearate; The organic salt includes any one or more of urea, sodium formate, and calcium formate; The water-reducing agent powder includes any one or more of polycarboxylate water-reducing agent powder, naphthalene-based water-reducing agent powder, and lignin water-reducing agent powder; The polyols include one or more of polyethylene glycol and calcium glycosides.

[0011] As a preferred embodiment of this technical solution, in the polyol of the present invention, the polyethylene glycol includes any one or more of polyethylene glycol 2000, polyethylene glycol 4000 and polyethylene glycol 6000.

[0012] As a preferred embodiment of this technical solution, in the reinforcing component of the present invention, The organic salt includes any one or more of urea, sodium formate, and calcium formate; The inorganic salt includes any one or more of sodium silicate, sodium sulfate, and sodium carbonate.

[0013] As a preferred embodiment of this technical solution, in the water-retaining component of the present invention, The polyvinyl alcohol includes any one or more of polyvinyl alcohol 1788, polyvinyl alcohol 1799, polyvinyl alcohol 2099 and polyvinyl alcohol 2699; The polyethylene glycol includes any one or more of polyethylene glycol 200, polyethylene glycol 400, polyethylene glycol 600, polyethylene glycol 2000, and polyethylene glycol 4000; The polyacrylamide includes any one or more of cationic, anionic, and nonionic polyacrylamide.

[0014] As a preferred embodiment of this technical solution, the cationic polyacrylamide includes any one or more of the following: 4 million cationic polyacrylamide, 6 million cationic polyacrylamide, and 8 million cationic polyacrylamide. The polyacrylamide anion includes any one or more of polyacrylamide anion 6 million, polyacrylamide anion 8 million, and polyacrylamide anion 12 million; The nonionic polyacrylamide includes any one or more of the following: nonionic polyacrylamide 6 million, nonionic polyacrylamide 8 million, and nonionic polyacrylamide 12 million.

[0015] As a preferred embodiment of this technical solution, the leveling component includes any one or more of carboxymethyl cellulose and hydroxypropyl methyl cellulose.

[0016] As a preferred embodiment of this technical solution, the preservative includes any one or more of sodium benzoate, potassium sorbate, sodium metabisulfite, and sodium thiosulfate.

[0017] As a preferred embodiment of this technical solution, the calcium-magnesium chelating agent includes any one or more of sodium gluconate, sucrose, calcium glycosides, and ATMP.

[0018] Secondly, the present invention also discloses a method for preparing the above-mentioned reinforced concrete water-retaining and slurry-enhancing agent, comprising the following steps: S1. Separately prepare pulping components, reinforcing components, and water-retaining components; S2. Place the slurry-enhancing component, reinforcing component, and water-retaining component in a mixing tank, mix them evenly, add the leveling agent, corrosion inhibitor, and calcium-magnesium complexing agent, and continue to mix evenly to obtain the reinforced concrete water-retaining and slurry-enhancing agent. S3. Sample the finished product for testing and adjust the raw materials according to the test results.

[0019] The reinforced concrete water-retaining and slurry-enhancing agent of this invention, through optimized formula design, innovatively combines three major functions: slurry enhancement, water retention, and reinforcement, solving the problem of single or mutually restrictive performance of traditional admixtures. Specifically, it has the following beneficial effects: 1. The organic and inorganic salts in the reinforcing components of this invention can participate in the concrete hydration process, thereby increasing the content of early cement hydration products, such as ettringite, and improving the early strength of concrete (1-3 days). Furthermore, the complexes produced by these components, when combined with other components, can not only disrupt the inert structure of the slow-hydrating tetracalcium aluminoferrite phase and increase its hydration rate, thus improving early strength, but also stimulate the chemical activity of dicalcium silicate, increasing hydration efficiency and improving the later strength of concrete (28 days). In addition, the reinforcing components can also reduce the porosity of cement paste, increase density, and enhance impermeability and durability. 2. The polyvinyl alcohol, polyethylene glycol, and polyacrylamide in the water-retaining components of this invention hydrolyze in the slurry solution, releasing micelles and forming a polymer network structure, which increases the surface tension of the solution and the viscosity of the slurry. Even if the sand and gravel gradation is poor, it can effectively prevent slurry separation. In addition, by adjusting the ratio of surfactant to polyol, the surface tension is reduced while the friction within the slurry is maintained, which can also ensure the pumpability of concrete and the workability of plastering. 3. The slurry-enhancing components of the present invention include surfactants, dispersants, organic salts, water-reducing agent powders, and polyols. Among them, the surfactants and water-reducing agent powders work synergistically to fully disperse cement particles, increase the slurry content by 20%-30%, and improve the surface appearance (reducing defects such as honeycomb and pitting). 4. The slurry enhancer of the present invention achieves simultaneous improvement in strength and workability through the synergistic effect of reinforcing components and water retention and thickening, solving the problems of traditional slurry enhancers reducing the cohesiveness and strength of concrete, and conventional water-retaining agents weakening the mechanical properties of concrete. 5. The slurry enhancer of the present invention improves hydration efficiency, reduces cement usage, and thus reduces carbon emissions; 6. The slurry enhancer of the present invention reduces quality defects, inhibits segregation and bleeding, and reduces the risk of hollowing and cracking. It is particularly suitable for high-grade concrete, manufactured sand concrete and other systems that are prone to bleeding. In summary, this invention achieves breakthroughs in three dimensions—slurry enhancement, water retention, and reinforcement—through the synergistic effect of multiple components, solving the long-standing technical problem in the industry of "weak water retention and easy separation of slurry." It is applicable to scenarios such as cast-in-place, precast, and ultra-high-rise pumping, and has high strength, high durability, and excellent workability, thus possessing significant engineering application value. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a flowchart illustrating the preparation method of the enhanced concrete water-retaining and slurry-enhancing agent of the present invention. Detailed Implementation

[0022] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0023] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations according to this application. As used herein, the singular form includes the plural form unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this description, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0024] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Example 1 The reinforced concrete water-retaining and slurry-enhancing agent of this embodiment includes the following components by weight: 30 parts of slurry-enhancing component, 50 parts of reinforcing component, 10 parts of water-retaining component, 2 parts of leveling component (carboxymethyl cellulose), 2 parts of preservative (potassium sorbate), and 6 parts of calcium-magnesium complexing agent (calcium saccharide). The pulping component consists of 15 parts sodium dodecyl sulfonate, 5 parts sodium stearate, 35 parts urea, 20 parts polycarboxylate superplasticizer powder, and 5 parts polyethylene glycol 2000. The reinforcing component consists of 45 parts calcium formate and 55 parts sodium silicate; The water-retaining component consists of 20 parts polyvinyl alcohol 1788, 30 parts polyethylene glycol 2000, and 50 parts cationic polyacrylamide 4 million.

[0026] like Figure 1As shown, the preparation method of the enhanced concrete water-retaining and slurry-raising agent in this embodiment includes the following steps: S11: Prepare raw materials, prepare the water-retaining and slurry-enhancing agent material according to the formula ratio, and the material does not contain hazardous chemicals; To prepare slurry-enhancing component A, add 15 parts sodium dodecyl sulfonate, 5 parts sodium stearate, 35 parts urea, 20 parts polycarboxylate superplasticizer powder, and 5 parts polyethylene glycol 2000 to a mixing tank in the specified proportions. After stirring for 10 minutes, mix the materials evenly to prepare slurry-enhancing component A. To prepare reinforcing component B, add 45 parts of calcium formate and 55 parts of sodium silicate to a mixing tank in a certain proportion. After stirring for 10 minutes, stir the materials evenly to prepare reinforcing component B. To prepare water-retaining component C, add 20 parts of polyvinyl alcohol 1788, 30 parts of polyethylene glycol 2000, and 50 parts of cationic polyacrylamide 4 million to a mixing tank in the specified proportions. After stirring for 30 minutes, mix the materials evenly to prepare water-retaining component C. S12: Mix components A, B, and C. Accurately weigh out the pulping component A, reinforcing component B, and water-retaining component C according to the proportions and add them to a 5 cubic meter rapid mixing tank. Start mixing for 30 minutes. Add 2 parts of carboxymethyl cellulose, 2 parts of potassium sorbate, and 6 parts of calcium saccharide to the mixing tank in the previous step and continue mixing for 30 minutes to prepare an enhanced water-retaining pulping agent. S13: Pack the mixed product into 25kg bags with inner bags using a weighing scale and store them in the finished product warehouse for shipment. Before leaving the warehouse, sample the finished products for testing, including filling and packaging testing as well as performance testing of the slurry enhancer, such as appearance, fineness, and concrete effect. Make necessary adjustments based on the test results to ensure product quality.

[0027] Example 2 The reinforced concrete water-retaining and slurry-enhancing agent of this embodiment includes the following components by weight: 40 parts of slurry-enhancing component, 40 parts of reinforcing component, 6 parts of water-retaining component, 2 parts of leveling component (carboxypropyl cellulose), 2 parts of preservative (sodium metabisulfite), and 10 parts of calcium-magnesium complexing agent (sodium gluconate). The pulping component consists of 32 parts sodium dodecyl sulfonate, 5 parts calcium stearate, 34 parts calcium formate, 20 parts naphthalene-based water-reducing agent powder, and 4 parts polyethylene glycol 4000. The reinforcing component consists of 48 parts sodium formate and 42 parts sodium sulfate; The water-retaining component consists of 10 parts polyvinyl alcohol 1799, 10 parts polyvinyl alcohol 2699, 30 parts polyethylene glycol 6000, and 50 parts cationic polyacrylamide 8 million.

[0028] like Figure 1As shown, the preparation method of the enhanced concrete water-retaining and slurry-raising agent in this embodiment includes the following steps: S21: Prepare raw materials, and prepare the water-retaining and slurry-enhancing agent material according to the formula ratio. The material does not contain hazardous chemicals. To prepare slurry-enhancing component A, add 32 parts sodium dodecyl sulfonate, 5 parts calcium stearate, 34 parts calcium formate, 20 parts naphthalene-based water-reducing agent powder, and 4 parts polyethylene glycol 4000 to a mixing tank in the specified proportions. After stirring for 10 minutes, mix the materials evenly to prepare slurry-enhancing component A. To prepare reinforcing component B, add 48 parts of sodium formate and 42 parts of sodium sulfate to a mixing tank in a certain proportion. After stirring for 10 minutes, stir the materials evenly to prepare reinforcing component B. To prepare water-retaining component C, add 10 parts of polyvinyl alcohol 1799, 10 parts of polyethylene glycol 2699, 30 parts of polyethylene glycol 6000, and 50 parts of cationic polyacrylamide 8 million to a mixing tank in the specified proportions. After stirring for 30 minutes, mix the materials evenly to prepare water-retaining component C. S22: Mix components A, B, and C. Accurately weigh out the pulping component A, reinforcing component B, and water-retaining component C according to the proportions and add them to a 5 cubic meter rapid mixing tank. Start mixing for 30 minutes. Add 2 parts of carboxypropyl cellulose, 2 parts of sodium metabisulfite, and 10 parts of sodium gluconate to the mixing tank in the previous step and continue mixing for 30 minutes to prepare an enhanced water-retaining pulping agent. S23: The mixed product is weighed and packed into 25kg bags with inner bags, and stored in the finished product warehouse for shipment. Before leaving the warehouse, samples are taken to test the finished products. The tests include filling and packaging tests as well as tests on the performance of the slurry enhancer, such as appearance, fineness, and concrete effect. The necessary adjustments are made based on the test results to ensure product quality.

[0029] Example 3 The reinforced concrete water-retaining and slurry-enhancing agent of this embodiment includes the following components by weight: 60 parts of slurry-enhancing component, 20 parts of reinforcing component, 5 parts of water-retaining component, 3 parts of leveling component (carboxymethyl cellulose), 2 parts of preservative (sodium thiosulfate), and 10 parts of calcium-magnesium complexing agent (calcium sugar). The pulping component consists of 28 parts triterpenoid saponins, 5 parts magnesium stearate, 32 parts sodium formate, 20 parts lignin water-reducing agent powder, and 2 parts polyethylene glycol 4000. The reinforcing component consists of 26 parts sodium formate and 44 parts sodium sulfate; The water-retaining component consists of 18 parts polyvinyl alcohol 2099, 12 parts polyethylene glycol 2000, 20 parts polyethylene glycol 6000, 10 parts cationic polyacrylamide 4 million, 20 parts anionic polyacrylamide 6 million and 20 parts nonionic polyacrylamide 12 million.

[0030] like Figure 1 As shown, the preparation method of the enhanced concrete water-retaining and slurry-raising agent in this embodiment includes the following steps: S31: Prepare raw materials, and prepare the water-retaining and slurry-enhancing agent material according to the formula ratio. The material does not contain hazardous chemicals. To prepare pulping component A, add 28 parts of triterpenoid saponins, 5 parts of magnesium stearate, 32 parts of sodium formate, 20 parts of lignin water-reducing agent powder, and 2 parts of polyethylene glycol 4000 to a mixing tank in the specified proportions. After stirring for 10 minutes, mix the materials evenly to prepare pulping component A. To prepare reinforcing component B, add 26 parts sodium formate, 20 parts urea, and 44 parts sodium sulfate to a mixing tank in a certain proportion. After stirring for 10 minutes, mix the materials evenly to prepare reinforcing component B. To prepare water-retaining component C, add 18 parts of polyvinyl alcohol 2099, 12 parts of polyethylene glycol 2000, 20 parts of polyethylene glycol 6000, 10 parts of cationic polyacrylamide 4 million, 20 parts of anionic polyacrylamide 6 million, and 20 parts of nonionic polyacrylamide 12 million to a mixing tank in the specified proportions. After stirring for 30 minutes, mix the materials evenly to prepare water-retaining component C. S32: Mix components A, B, and C. Accurately weigh out component A, reinforcing component B, and water-retaining component C according to the proportions and add them to a 5 cubic meter rapid mixing tank. Start mixing for 30 minutes. Add 3 parts of carboxymethyl cellulose, 2 parts of sodium thiosulfate, and 10 parts of calcium saccharide to the mixing tank in the previous step and continue mixing for 30 minutes to prepare an enhanced water-retaining and pulping agent. S33: The mixed product is weighed and packed into 25kg bags with inner bags, and stored in the finished product warehouse for shipment. Before leaving the warehouse, samples are taken to test the finished products. The tests include filling and packaging tests as well as tests on the performance of the slurry enhancer, such as appearance, fineness, and concrete effect. The necessary adjustments are made based on the test results to ensure product quality.

[0031] Example 4 The reinforced concrete water-retaining and slurry-enhancing agent of this embodiment includes the following components by weight: 1 part slurry-enhancing component, 0.5 part reinforcing component, 0.5 part water-retaining component, 0.5 part leveling component (carboxymethyl cellulose), 0.5 part preservative (potassium sorbate), and 0.5 part calcium-magnesium complexing agent (calcium saccharide). The pulping component consists of 1 part sodium dodecyl sulfonate, 0.5 parts sodium stearate, 1 part urea, 1 part polycarboxylate superplasticizer powder, and 0.5 parts polyethylene glycol 2000. The reinforcing component consists of 0.5 parts calcium formate and 1 part sodium silicate; The water-retaining component consists of 0.5 parts polyvinyl alcohol 1788, 20 parts polyethylene glycol 2000, and 1 part cationic polyacrylamide 4 million.

[0032] like Figure 1 As shown, the preparation method of the enhanced concrete water-retaining and slurry-raising agent in this embodiment includes the following steps: S41: Prepare raw materials, and prepare the water-retaining and slurry-enhancing agent material according to the formula ratio. The material does not contain hazardous chemicals. To prepare slurry-enhancing component A, add 1 part sodium dodecyl sulfonate, 0.5 parts sodium stearate, 1 part urea, 1 part polycarboxylate superplasticizer powder, and 0.5 parts polyethylene glycol 2000 to a mixing tank according to the proportion. After stirring for 10 minutes, stir the materials evenly to prepare slurry-enhancing component A. To prepare reinforcing component B, add 0.5 parts of calcium formate and 1 part of sodium silicate to a mixing tank in a certain proportion. After stirring for 10 minutes, stir the materials evenly to prepare reinforcing component B. To prepare water-retaining component C, add 0.5 parts of polyvinyl alcohol 1788, 20 parts of polyethylene glycol 2000, and 1 part of cationic polyacrylamide 4 million to a mixing tank in the specified proportions. After stirring for 30 minutes, mix the materials evenly to prepare water-retaining component C. S42: Mix components A, B, and C. Accurately weigh out the pulping component A, reinforcing component B, and water-retaining component C according to the proportions and add them to a 5 cubic meter rapid mixing tank. Start mixing for 30 minutes. Add 0.5 parts of carboxymethyl cellulose, 0.5 parts of potassium sorbate, and 0.5 parts of calcium saccharide to the mixing tank from the previous step and continue mixing for 30 minutes to prepare an enhanced water-retaining pulping agent. S43: The mixed product is weighed and packed into 25kg bags with inner bags, and stored in the finished product warehouse for shipment. Before leaving the warehouse, samples are taken to test the finished products. The tests include filling and packaging tests as well as tests on the performance of the slurry enhancer, such as appearance, fineness, and concrete effect. The necessary adjustments are made based on the test results to ensure product quality.

[0033] Example 5 The reinforced concrete water-retaining and slurry-enhancing agent of this embodiment includes the following components by weight: 55 parts of slurry-enhancing component, 50 parts of reinforcing component, 15 parts of water-retaining component, 5 parts of leveling component (carboxymethyl cellulose), 5 parts of preservative (potassium sorbate), and 8 parts of calcium-magnesium complexing agent (calcium saccharide). The pulping component consists of 40 parts sodium dodecyl sulfonate, 5 parts sodium stearate, 35 parts urea, 20 parts polycarboxylate superplasticizer powder, and 5 parts polyethylene glycol 2000. The reinforcing component consists of 55 parts calcium formate and 50 parts sodium silicate; The water-retaining component consists of 25 parts polyvinyl alcohol 1788, 30 parts polyethylene glycol 2000, and 50 parts cationic polyacrylamide 4 million.

[0034] like Figure 1 As shown, the preparation method of the enhanced concrete water-retaining and slurry-raising agent in this embodiment includes the following steps: S51: Prepare raw materials, and prepare the water-retaining and slurry-enhancing agent material according to the formula ratio. The material does not contain hazardous chemicals. To prepare slurry-enhancing component A, add 40 parts sodium dodecyl sulfonate, 5 parts sodium stearate, 35 parts urea, 20 parts polycarboxylate superplasticizer powder, and 5 parts polyethylene glycol 2000 to a mixing tank in the specified proportions. After stirring for 10 minutes, mix the materials evenly to prepare slurry-enhancing component A. To prepare reinforcing component B, add 55 parts of calcium formate and 50 parts of sodium silicate to a mixing tank in a certain proportion. After stirring for 10 minutes, stir the materials evenly to prepare reinforcing component B. To prepare water-retaining component C, add 25 parts of polyvinyl alcohol 1788, 30 parts of polyethylene glycol 2000, and 50 parts of cationic polyacrylamide 4 million to a mixing tank in the specified proportions. After stirring for 30 minutes, mix the materials evenly to prepare water-retaining component C. S52: Mix components A, B, and C. Accurately weigh out the pulping component A, reinforcing component B, and water-retaining component C according to the proportions and add them to a 5 cubic meter rapid mixing tank. Start mixing for 30 minutes. Add 5 parts of carboxymethyl cellulose, 5 parts of potassium sorbate, and 8 parts of calcium saccharide to the mixing tank in the previous step and continue mixing for 30 minutes to prepare an enhanced water-retaining pulping agent. S53: The mixed product is weighed and packed into 25kg bags with inner bags, and stored in the finished product warehouse for shipment. Before leaving the warehouse, samples are taken to test the finished products. The tests include filling and packaging tests as well as tests on the performance of the slurry enhancer, such as appearance, fineness, and concrete effect. The necessary adjustments are made based on the test results to ensure product quality.

[0035] Compare with Example 1 Concrete without added concrete improver.

[0036] Compare with Example 2 Concrete with added water-retaining and slurry-enhancing agent A; The composition of concrete water-retaining and slurry-enhancing agent A in this comparative example is as follows: the calcium-magnesium complexing agent in the example is replaced with sodium sulfate, and its actual composition is as follows: 55 parts of slurry-enhancing component, 50 parts of reinforcing component, 15 parts of water-retaining component, 5 parts of leveling component (carboxymethyl cellulose), 5 parts of preservative (potassium sorbate), and 8 parts of sodium sulfate. The pulping component consists of 40 parts sodium dodecyl sulfonate, 5 parts sodium stearate, 35 parts urea, 20 parts polycarboxylate superplasticizer powder, and 5 parts polyethylene glycol 2000. The reinforcing component consists of 55 parts calcium formate and 50 parts sodium silicate; The water-retaining component consists of 25 parts polyvinyl alcohol 1788, 30 parts polyethylene glycol 2000, and 50 parts cationic polyacrylamide 4 million.

[0037] Compare with Example 3 Concrete with added water-retaining and slurry-enhancing agent B; The composition of concrete water-retaining and slurry-enhancing agent B in this comparative example is as follows: sodium dodecyl sulfonate in the slurry-enhancing component of the example is replaced with sodium dodecylbenzene sulfonate. Its actual composition is as follows: 30 parts of slurry-enhancing component, 50 parts of reinforcing component, 10 parts of water-retaining component, 2 parts of leveling component (carboxymethyl cellulose), 2 parts of preservative (potassium sorbate), and 6 parts of calcium-magnesium complexing agent (calcium sugar). The pulping component consists of 15 parts sodium dodecanephenyl sulfonate, 5 parts sodium stearate, 35 parts urea, 20 parts polycarboxylate superplasticizer powder, and 5 parts polyethylene glycol 2000. The reinforcing component consists of 45 parts calcium formate and 55 parts sodium silicate; The water-retaining component consists of 20 parts polyvinyl alcohol 1788, 30 parts polyethylene glycol 2000, and 50 parts cationic polyacrylamide 4 million.

[0038] Test case The workability, slump loss, and compressive strength of concrete from Examples 1-3 (with the addition of the reinforced concrete water-retaining and slurry-enhancing agent prepared according to the present invention) HD-TJA-TJC, Control Example 1 (without concrete slurry-enhancing agent), and Control Examples 2-3 (with the addition of commercially available concrete water-retaining and slurry-enhancing agent) were tested. The concrete slump test method was performed according to the relevant provisions of GB8076-2008 "Concrete Admixtures"; the concrete compressive strength test was performed according to the relevant provisions of GB / T50081-2002 "Standard for Test Methods of Mechanical Properties of Ordinary Concrete". The test mix proportions and test results are shown in Tables 1-4. Table 1. Mix proportions of C30 test concrete

[0039] Table 2 Test data for C30 concrete

[0040] Table 3. Mix proportions of C50 test concrete

[0041] Table 4 Test data for C50 concrete

[0042] As shown in Tables 1-4, compared with the blank group and the concrete with commercially available water-retaining and slurry-enhancing agents, the reinforced concrete slurry-enhancing agents prepared in Examples 1-3 of this invention have rich slurry, and the concrete has improved in terms of encapsulation, fluidity, and workability. The 3-day strength, 7-day strength, and 28-day strength are all increased to varying degrees. This further illustrates that the reinforced water-retaining and slurry-enhancing agent of this invention achieves breakthroughs in the three dimensions of slurry enhancement, water retention, and reinforcement through the synergistic effect of multiple components, solving the long-standing technical problem in the industry of "weak water retention and easy separation of slurry enhancement".

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A reinforced concrete water-retaining and slurry-enhancing agent, characterized in that, The ingredients include the following parts by weight: The slurry-enhancing component is 0.5-55 parts, the reinforcing component is 0.5-50 parts, the water-retaining component is 0.5-15 parts, the leveling component is 0.5-5 parts, the preservative is 0.5-5 parts, and the calcium-magnesium complexing agent is 0.5-10 parts. The pulping component comprises the following raw materials in parts by weight: 0.5-40 parts surfactant, 0.5-5 parts dispersant, 0.5-40 parts organic salt, 0.5-20 parts water-reducing agent powder, and 0.5-5 parts polyol; The reinforcing component comprises the following raw materials in parts by weight: 0.5-55 parts of organic salt and 0.5-55 parts of inorganic salt; The water-retaining component comprises the following raw materials in parts by weight: 0.5-25 parts of polyvinyl alcohol, 20-40 parts of polyethylene glycol, and 0.5-50 parts of polyacrylamide.

2. The reinforced concrete water-retaining and slurry-enhancing agent according to claim 1, characterized in that, In the pulping component The surfactant includes any one or more of sodium dodecyl sulfate, sodium dodecyl sulfonate, and triterpenoid saponins; The dispersant includes any one or more of sodium stearate, magnesium stearate, and calcium stearate; The organic salt includes any one or more of urea, sodium formate, and calcium formate; The water-reducing agent powder includes any one or more of polycarboxylate water-reducing agent powder, naphthalene-based water-reducing agent powder, and lignin water-reducing agent powder; The polyols include one or more of polyethylene glycol and calcium glycosides.

3. The reinforced concrete water-retaining and slurry-enhancing agent according to claim 2, characterized in that, The polyols include polyethylene glycol, which comprises any one or more of polyethylene glycol 2000, polyethylene glycol 4000, and polyethylene glycol 6000.

4. The reinforced concrete water-retaining and slurry-enhancing agent according to claim 1, characterized in that, In the reinforcing component, The organic salt includes any one or more of urea, sodium formate, and calcium formate; The inorganic salt includes any one or more of sodium silicate, sodium sulfate, and sodium carbonate.

5. The reinforced concrete water-retaining and slurry-enhancing agent according to claim 1, characterized in that, In the water-retaining component The polyvinyl alcohol includes any one or more of polyvinyl alcohol 1788, polyvinyl alcohol 1799, polyvinyl alcohol 2099 and polyvinyl alcohol 2699; The polyethylene glycol includes any one or more of polyethylene glycol 200, polyethylene glycol 400, polyethylene glycol 600, polyethylene glycol 2000, and polyethylene glycol 4000; The polyacrylamide includes any one or more of cationic, anionic, and nonionic polyacrylamide.

6. The reinforced concrete water-retaining and slurry-enhancing agent according to claim 5, characterized in that, The cationic polyacrylamide includes any one or more of the following: 4 million cationic polyacrylamide, 6 million cationic polyacrylamide, and 8 million cationic polyacrylamide. The polyacrylamide anion includes any one or more of polyacrylamide anion 6 million, polyacrylamide anion 8 million, and polyacrylamide anion 12 million; The nonionic polyacrylamide includes any one or more of the following: nonionic polyacrylamide 6 million, nonionic polyacrylamide 8 million, and nonionic polyacrylamide 12 million.

7. The reinforced concrete water-retaining and slurry-enhancing agent according to claim 1, characterized in that, The leveling component includes any one or more of carboxymethyl cellulose and hydroxypropyl methyl cellulose.

8. The reinforced concrete water-retaining and slurry-enhancing agent according to claim 1, characterized in that, The preservatives include any one or more of sodium benzoate, potassium sorbate, sodium metabisulfite, and sodium thiosulfate.

9. The reinforced concrete water-retaining and slurry-enhancing agent according to claim 1, characterized in that, The calcium-magnesium chelating agent includes any one or more of sodium gluconate, sucrose, calcium glycosides, and ATMP.

10. A method for preparing the enhanced concrete water-retaining and slurry-enhancing agent according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Separately prepare pulping components, reinforcing components, and water-retaining components; S2. Place the slurry-enhancing component, reinforcing component, and water-retaining component in a mixing tank, mix them evenly, add the leveling agent, corrosion inhibitor, and calcium-magnesium complexing agent, and continue to mix evenly to obtain the reinforced concrete water-retaining and slurry-enhancing agent. S3. Sample the finished product for testing and adjust the raw materials according to the test results.

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