Sand stabilization material

Abstract

The invention relates to a sand stabilization material and a preparation method thereof, the sand stabilization material comprises the following components in parts by weight: 40 to 60 parts of self-crosslinking type emulsion, 30 to 65 parts of water, 0.02 to 0.03 part of defoaming agent, 0.03 to 0.05 part of sorbitol and 0.03 to 0.05 part of carboxymethyl cellulose, and the total part number of the self-crosslinking type emulsion and the water is 100. The method comprises the following steps: adding water and a self-crosslinking emulsion into a reaction kettle, and starting stirring at a stirring speed of 500 r / min; the stirring speed is reduced, carboxymethyl cellulose is added into the reaction kettle until the carboxymethyl cellulose is completely dissolved, the stirring speed is 350 r / min, and the adding speed of the carboxymethyl cellulose is not larger than 1 kg / min; adding sorbitol into the reaction kettle, and stirring until the sorbitol is completely dissolved; and adding a defoaming agent into the reaction kettle, and stirring until bubbles completely disappear. The material can permeate into concrete to activate cement hydration reaction, so that the water tightness and strength of the concrete are improved, and the compression resistance and wear resistance of the concrete are improved.

Description

Technical Field

[0001] This invention relates to the field of substrate protection materials technology, and in particular to a sand-fixing material and its preparation method. Background Technology

[0002] The surface of cement products such as concrete, exterior walls, and bridges is prone to forming a loose layer due to imbalance of water-cement ratio, insufficient curing, or carbonation. In addition, poor construction of concrete floors and walls can also cause the surface to be not wear-resistant and have low strength, resulting in phenomena such as sanding and peeling, or weathering after long-term use, affecting the service life of the material and the adhesion performance with later materials.

[0003] In recent years, various interface treatment agents have emerged to improve the physical strength of substrates. Their fundamental purpose is to improve the adhesion of smooth substrates and strengthen the hardness of loose substrates. However, existing treatment agents cannot strengthen the deep layers of the substrate, and there is still a risk of peeling off the substrate surface after treatment. Summary of the Invention

[0004] In view of the shortcomings of the above-mentioned prior art, this application provides a sand-fixing material and its preparation method, which can penetrate into the interior of concrete, activate the cement hydration reaction, thereby improving the water tightness and strength of concrete, and improving the compressive strength and wear resistance of concrete, and has strong practicality.

[0005] To achieve the above objectives, the present invention employs the following techniques: A sand-fixing material, characterized in that it comprises the following components: The composition comprises a self-crosslinking emulsion, water, defoamer, sorbitol, and carboxymethyl cellulose, wherein the components by weight are: 40-60 parts self-crosslinking emulsion, 30-65 parts water, 0.02-0.03 parts defoamer, 0.03-0.05 parts sorbitol, and 0.03-0.05 parts carboxymethyl cellulose, and the total weight of the self-crosslinking emulsion and water is 100.

[0006] Specifically, the self-crosslinking emulsion is a styrene-acrylic copolymer emulsion with a pH of 10.5±1 and a Tg of 9±2 at 25℃.

[0007] Specifically, the defoamer is an organosilicone defoamer.

[0008] Specifically, the sorbitol content is 70% liquid sorbitol.

[0009] Specifically, the viscosity of carboxymethyl cellulose is 20,000 mPa·s to 30,000 mPa·s.

[0010] A method for preparing a sand-fixing material includes the following steps: S01. Add water and self-crosslinking emulsion to the reactor and start stirring at a speed of 500 rpm. S02. Reduce the stirring speed and add carboxymethyl cellulose to the reactor until the carboxymethyl cellulose is completely dissolved. The stirring speed is 350 rpm and the addition rate of carboxymethyl cellulose is no more than 1 kg / min. S03. Add sorbitol to the reaction vessel and stir until it is completely dissolved; S04. Add defoamer to the reaction vessel and stir until the bubbles completely disappear.

[0011] The beneficial effects of this invention are as follows: It can penetrate into the interior of concrete, activate the cement hydration reaction, and thus improve the water tightness and strength of concrete, as well as its compressive strength and abrasion resistance. It is also easy to use, as it can be directly sprayed or rolled onto the concrete surface without affecting the existing substrate. Furthermore, it reduces sanding on concrete and cement surfaces, improves their surface strength, and provides high strength and waterproofing. When applied to the interface treatment of porous substrates, the unique active ingredients in the material give it extremely strong permeability, accelerating its penetration into the substrate through capillary channels and microcracks. After crystallization, it forms a seamless whole with the substrate. Simultaneously, the macromolecules in the system form a continuous film that adheres to the substrate surface, improving the hydrophobicity of the substrate surface, thereby achieving a dual reinforcement and protection effect, and exhibiting excellent adhesion and bonding strength. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the implementation methods of the present invention will be described in detail below. However, the embodiments described in the present invention are only some embodiments of the present invention, and not all embodiments.

[0013] Example 1 One aspect of this application provides a sand-fixing material, characterized in that it comprises the following components: The composition comprises a self-crosslinking emulsion, water, defoamer, sorbitol, and carboxymethyl cellulose, wherein the components by weight are: 40-60 parts self-crosslinking emulsion, 30-65 parts water, 0.02-0.03 parts defoamer, 0.03-0.05 parts sorbitol, and 0.03-0.05 parts carboxymethyl cellulose, and the total weight of the self-crosslinking emulsion and water is 100.

[0014] Specifically, the self-crosslinking emulsion is a styrene-acrylic copolymer emulsion with a pH of 10.5±1 and a Tg of 9±2 at 25℃. The defoamer is an organosilicon defoamer, the sorbitol is 70% liquid sorbitol, and the carboxymethyl cellulose has a viscosity of 20000 mpa.s to 30000 mpa.s.

[0015] Specifically, the composition is as follows: emulsion: 35 parts, water: 65 parts, defoamer: 0.02 parts, sorbitol: 0.03 parts, carboxymethyl cellulose: 0.03 parts.

[0016] Another aspect of this application provides a method for preparing a sand-fixing material, comprising the following steps: S01. Add 65 parts of water and 35 parts of self-crosslinking emulsion to the reactor and start stirring at a speed of 500 rpm. S02. Reduce the stirring speed to 350 rpm, add 0.03 parts of carboxymethyl cellulose to the reactor until the carboxymethyl cellulose is completely dissolved, and the addition rate of carboxymethyl cellulose is no more than 1 kg / min. S03. Add 0.03 parts of sorbitol to the reaction vessel and stir until it is completely dissolved; S04. Add 0.02 parts of defoamer to the reaction vessel and stir until the bubbles completely disappear.

[0017] Example 2 One aspect of this example provides a sand-fixing material comprising the following components in parts by weight: Emulsion: 40 parts, water: 60 parts, defoamer: 0.02 parts, sorbitol: 0.03 parts, carboxymethyl cellulose: 0.03 parts.

[0018] Another aspect of this example provides a method for preparing a sand-fixing material, comprising the following steps: S01. Add 60 parts of water and 40 parts of self-crosslinking emulsion to the reactor and start stirring at a speed of 500 rpm. S02. Reduce the stirring speed to 350 rpm, add 0.03 parts of carboxymethyl cellulose to the reactor until the carboxymethyl cellulose is completely dissolved, and the addition rate of carboxymethyl cellulose is no more than 1 kg / min. S03. Add 0.03 parts of sorbitol to the reaction vessel and stir until it is completely dissolved; S04. Add 0.02 parts of defoamer to the reaction vessel and stir until the bubbles completely disappear.

[0019] Example 3 One aspect of this example provides a sand-fixing material comprising the following components in parts by weight: Emulsion: 50 parts, water: 50 parts, defoamer: 0.02 parts, sorbitol: 0.03 parts, carboxymethyl cellulose: 0.03 parts.

[0020] Another aspect of this example provides a method for preparing a sand-fixing material, comprising the following steps: S01. Add 50 parts of water and 50 parts of self-crosslinking emulsion to the reactor and start stirring at a speed of 500 rpm. S02. Reduce the stirring speed to 350 rpm, add 0.03 parts of carboxymethyl cellulose to the reactor until the carboxymethyl cellulose is completely dissolved, and the addition rate of carboxymethyl cellulose is no more than 1 kg / min. S03. Add 0.03 parts of sorbitol to the reaction vessel and stir until it is completely dissolved; S04. Add 0.02 parts of defoamer to the reaction vessel and stir until the bubbles completely disappear.

[0021] Example 4 One aspect of this example provides a sand-fixing material comprising the following components in parts by weight: Emulsion: 60 parts, water: 40 parts, defoamer: 0.02 parts, sorbitol: 0.03 parts, carboxymethyl cellulose: 0.03 parts.

[0022] Another aspect of this example provides a method for preparing a sand-fixing material, comprising the following steps: S01. Add 40 parts of water and 60 parts of self-crosslinking emulsion to the reactor and start stirring at a speed of 500 rpm. S02. Reduce the stirring speed to 350 rpm, add 0.03 parts of carboxymethyl cellulose to the reactor until the carboxymethyl cellulose is completely dissolved, and the addition rate of carboxymethyl cellulose is no more than 1 kg / min. S03. Add 0.03 parts of sorbitol to the reaction vessel and stir until it is completely dissolved; S04. Add 0.02 parts of defoamer to the reaction vessel and stir until the bubbles completely disappear.

[0023] Example 5 One aspect of this example provides a sand-fixing material comprising the following components in parts by weight: Emulsion: 60 parts, water: 40 parts, defoamer: 0.02 parts, sorbitol: 0.05 parts, carboxymethyl cellulose: 0.05 parts.

[0024] Another aspect of this example provides a method for preparing a sand-fixing material, comprising the following steps: S01. Add 40 parts of water and 60 parts of self-crosslinking emulsion to the reactor and start stirring at a speed of 500 rpm. S02. Reduce the stirring speed to 350 rpm, add 0.05 parts of carboxymethyl cellulose to the reactor until the carboxymethyl cellulose is completely dissolved, and the addition rate of carboxymethyl cellulose is no more than 1 kg / min. S03. Add 0.05 parts of sorbitol to the reaction vessel and stir until it is completely dissolved; S04. Add 0.02 parts of defoamer to the reaction vessel and stir until the bubbles completely disappear.

[0025] Example 6 Emulsion: 50 parts, water: 50 parts, defoamer: 0.025 parts, sorbitol: 0.03 parts, carboxymethyl cellulose: 0.03 parts.

[0026] Another aspect of this example provides a method for preparing a sand-fixing material, comprising the following steps: S01. Add 50 parts of water and 50 parts of self-crosslinking emulsion to the reactor and start stirring at a speed of 500 rpm. S02. Reduce the stirring speed to 350 rpm, add 0.03 parts of carboxymethyl cellulose to the reactor until the carboxymethyl cellulose is completely dissolved, and the addition rate of carboxymethyl cellulose is no more than 1 kg / min. S03. Add 0.03 parts of sorbitol to the reaction vessel and stir until it is completely dissolved; S04. Add 0.025 parts of defoamer to the reaction vessel and stir until the bubbles completely disappear.

[0027] Example 7 Emulsion: 40 parts, water: 60 parts, defoamer: 0.03 parts, sorbitol: 0.04 parts, carboxymethyl cellulose: 0.04 parts.

[0028] Another aspect of this example provides a method for preparing a sand-fixing material, comprising the following steps: S01. Add 40 parts of water and 60 parts of self-crosslinking emulsion to the reactor and start stirring at a speed of 500 rpm. S02. Reduce the stirring speed to 350 rpm, add 0.04 parts of carboxymethyl cellulose to the reactor until the carboxymethyl cellulose is completely dissolved, and the addition rate of carboxymethyl cellulose is no more than 1 kg / min. S03. Add 0.04 parts of sorbitol to the reaction vessel and stir until it is completely dissolved; S04. Add 0.03 parts of defoamer to the reaction vessel and stir until the bubbles completely disappear.

[0029] Example 8 Emulsion: 60 parts, water: 40 parts, defoamer: 0.02 parts, sorbitol: 0.045 parts, carboxymethyl cellulose: 0.035 parts.

[0030] Another aspect of this example provides a method for preparing a sand-fixing material, comprising the following steps: S01. Add 40 parts of water and 60 parts of self-crosslinking emulsion to the reactor and start stirring at a speed of 500 rpm. S02. Reduce the stirring speed to 350 rpm, add 0.035 parts of carboxymethyl cellulose to the reactor until the carboxymethyl cellulose is completely dissolved, and the addition rate of carboxymethyl cellulose is no more than 1 kg / min. S03. Add 0.035 parts of sorbitol to the reaction vessel and stir until it is completely dissolved; S04. Add 0.02 parts of defoamer to the reaction vessel and stir until the bubbles completely disappear.

[0031] Example 9 Emulsion: 60 parts, water: 40 parts, defoamer: 0.02 parts, sorbitol: 0.035 parts, carboxymethyl cellulose: 0.04 parts.

[0032] Another aspect of this example provides a method for preparing a sand-fixing material, comprising the following steps: S01. Add 40 parts of water and 60 parts of self-crosslinking emulsion to the reactor and start stirring at a speed of 500 rpm. S02. Reduce the stirring speed to 350 rpm, add 0.04 parts of carboxymethyl cellulose to the reactor until the carboxymethyl cellulose is completely dissolved, and the addition rate of carboxymethyl cellulose is no more than 1 kg / min. S03. Add 0.055 parts of sorbitol to the reaction vessel and stir until it is completely dissolved; S04. Add 0.02 parts of defoamer to the reaction vessel and stir until the bubbles completely disappear.

[0033] Comparative Example 1 One aspect of this comparative example provides a sand-fixing material comprising the following components in parts by weight: Emulsion: 60 parts, water: 40 parts, defoamer: 0.02 parts, sorbitol: 0.05 parts, carboxymethyl cellulose: 0.03 parts.

[0034] Another aspect of this comparative example provides a method for preparing a sand-fixing material, comprising the following steps: S01. Add 40 parts of water and 60 parts of self-crosslinking emulsion to the reactor and start stirring at a speed of 500 rpm. S02. Reduce the stirring speed to 350 rpm, add 0.03 parts of carboxymethyl cellulose to the reactor until the carboxymethyl cellulose is completely dissolved, and the addition rate of carboxymethyl cellulose is no more than 1 kg / min. S03. Add 0.05 parts of sorbitol to the reaction vessel and stir until it is completely dissolved; S04. Add 0.02 parts of defoamer to the reaction vessel and stir until the bubbles completely disappear.

[0035] Comparative Example 2 One aspect of this comparative example provides a sand-fixing material comprising the following components in parts by weight: Emulsion: 70 parts, water: 30 parts, defoamer: 0.02 parts, sorbitol: 0.05 parts, carboxymethyl cellulose: 0.05 parts.

[0036] Another aspect of this comparative example provides a method for preparing a sand-fixing material, comprising the following steps: S01. Add 30 parts of water and 70 parts of self-crosslinking emulsion to the reactor and start stirring at a speed of 500 rpm. S02. Reduce the stirring speed to 350 rpm, add 0.05 parts of carboxymethyl cellulose to the reactor until the carboxymethyl cellulose is completely dissolved, and the addition rate of carboxymethyl cellulose is no more than 1 kg / min. S03. Add 0.05 parts of sorbitol to the reaction vessel and stir until it is completely dissolved; S04. Add 0.02 parts of defoamer to the reaction vessel and stir until the bubbles completely disappear.

[0037] Comparative experiment The tensile bond strength of the sand-fixing material was tested according to the DI type standard requirements in JC / T 907-2018 "Concrete Interface Treatment Agents", with a material-cement-standard sand ratio of 1:1:1. The tensile bond strength test was conducted according to Clause 5.6 of JC / T907-2018 "Concrete Interface Treatment Agents". The penetration performance test was conducted according to Clause 5.7 of JC / T902-2002 "Organic Silicone Waterproofing Agents for Building Surfaces".

[0038] The test results are shown in the table below: As shown in the table above, the performance of sand-fixing materials far surpasses that of ordinary interface treatment agents, especially in terms of heat resistance and penetration. This demonstrates that while conventional interface treatment agents can increase the bonding force between the base layer and the surface layer, effectively prevent hollowing and peeling, and reduce cracking and detachment of the ground base layer, sand-fixing materials are not limited to the functions of interface agents. They can penetrate into the concrete, activate the cement hydration reaction, and thus improve the water tightness and strength of the concrete, as well as the compressive strength and wear resistance of cement mortar concrete. Their performance characteristics far exceed those of interface agents.

[0039] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and variations.

Claims

1. A sand-fixing material, characterized in that, Includes the following components: Self-crosslinking emulsion, water, defoamer, sorbitol, carboxymethyl cellulose, wherein each component is in parts by weight as follows: The mixture consists of 40-60 parts of self-crosslinking emulsion, 30-65 parts of water, 0.02-0.03 parts of defoamer, 0.03-0.05 parts of sorbitol, and 0.03-0.05 parts of carboxymethyl cellulose, with the total amount of self-crosslinking emulsion and water being 100.

2. The sand-fixing material according to claim 1, characterized in that, The self-crosslinking emulsion is a styrene-acrylic copolymer emulsion with a pH of 10.5±1 and a Tg of 9±2 at 25℃.

3. The sand-fixing material according to claim 1, characterized in that, The defoamer is an organosilicone defoamer.

4. The sand-fixing material according to claim 1, characterized in that, The sorbitol is 70% liquid sorbitol.

5. The sand-fixing material according to claim 1, characterized in that, The viscosity of the carboxymethyl cellulose is 20,000 mPa·s to 30,000 mPa·s.

6. A method for preparing a sand-fixing material as described in any one of claims 1-5, characterized in that, Includes the following steps: S01. Add water and self-crosslinking emulsion to the reactor and start stirring; S02. Reduce the stirring speed and add carboxymethyl cellulose to the reactor until the carboxymethyl cellulose is completely dissolved. S03. Add sorbitol to the reaction vessel and stir until it is completely dissolved; S04. Add defoamer to the reaction vessel and stir until the bubbles completely disappear.

7. The method for preparing sand-fixing material according to claim 6, characterized in that, The stirring speed in S1 is 500 rpm.

8. The method for preparing sand-fixing material according to claim 6, characterized in that, The stirring speed in S2 is 350 rpm, and the addition speed of carboxymethyl cellulose is no more than 1 kg / min.

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