阅读说明：本技术 一种高弹丙烯酸盐灌浆材料及其制备方法与应用 (High-elasticity acrylate grouting material and preparation method and application thereof ) 是由 曾娟娟 韦代东 张文超 于 2021-07-30 设计创作，主要内容包括：本发明属于化学灌浆技术领域,公开了一种高弹丙烯酸盐灌浆材料及其制备方法与应用。所述的A组份由以下按质量份数计的原料制备而成：丙烯酸34.8-39份,碱性物质9.6-15.7份,交联剂1.0-1.7份,促进剂0.6-1.6份,蒸馏水A 42.7-54份；所述的B组份由以下按质量份数计的原料制备而成：引发剂0.6-1.6份,蒸馏水B 98.4-99.4份。本发明制备的高弹丙烯酸盐灌浆材料断裂伸长率高达900％,遇水膨胀率≥60％,不仅可以代替进口产品应用于变形缝的渗漏水治理和修复,也可应用于帷幕灌浆和渗漏水堵截。(The invention belongs to the technical field of chemical grouting, and discloses a high-elasticity acrylate grouting material, and a preparation method and application thereof. The component A is prepared from the following raw materials in parts by weight: 34.8-39 parts of acrylic acid, 9.6-15.7 parts of alkaline substance, 1.0-1.7 parts of cross-linking agent, 0.6-1.6 parts of accelerator and 42.7-54 parts of distilled water A; the component B is prepared from the following raw materials in parts by weight: 0.6-1.6 parts of initiator and 98.4-99.4 parts of distilled water B. The high-elasticity acrylate grouting material prepared by the invention has the elongation at break of up to 900 percent and the water-swelling rate of more than or equal to 60 percent, can be applied to the treatment and repair of water leakage of deformation joints instead of imported products, and can also be applied to curtain grouting and water leakage blocking.)

1. A high-elastic acrylate grouting material is characterized in that: the high-elasticity acrylate grouting material consists of a component A and a component B in a volume ratio of 1: 1; the component A is prepared from the following raw materials in parts by weight: 34.8-39 parts of acrylic acid, 9.6-15.7 parts of alkaline substance, 1.0-1.7 parts of cross-linking agent, 0.6-1.6 parts of accelerator and 42.7-54 parts of distilled water A; the component B is prepared from the following raw materials in parts by weight: 0.6-1.6 parts of initiator and 98.4-99.4 parts of distilled water B; the alkaline substance is magnesium oxide or magnesium hydroxide; the cross-linking agent is a water-soluble aziridine cross-linking agent; the accelerant is at least one of diethanolamine and triethanolamine; the initiator is at least one of potassium persulfate, sodium persulfate and ammonium persulfate.

2. The high-elasticity acrylate grouting material as claimed in claim 1, characterized in that: the aziridine crosslinking agent is at least one of trimethylolpropane-tris [3- (2-methylaziridinyl) ] propionate, trimethylolpropane-tris (3-aziridinyl) propionate, and pentaerythritol-tris (3-aziridinyl) propionate).

3. The high-elasticity acrylate grouting material as claimed in claim 1, characterized in that: the aziridine crosslinking agent is a commercially available aziridine crosslinking agent XR-100.

4. The high-elasticity acrylate grouting material as claimed in claim 1, characterized in that: the accelerant is triethanolamine.

5. The high-elasticity acrylate grouting material as claimed in claim 1, characterized in that: the initiator is sodium persulfate.

6. The method for preparing a high-elasticity acrylate grouting material according to claim 1, characterized in that: the method comprises the following steps:

(1) uniformly mixing acrylic acid and distilled water A, adding alkaline substances in batches under the stirring condition, controlling the temperature of a reaction system to be not more than 50 ℃ by adopting cooling water, and reacting for 30min after all the alkaline substances are added to obtain a magnesium acrylate solution; adding a cross-linking agent and an accelerant into the magnesium acrylate solution, and uniformly mixing to obtain a component A;

(2) dissolving an initiator in distilled water B, and uniformly mixing to obtain a component B;

(3) and uniformly mixing the component A and the component B according to the volume ratio of 1:1 to prepare the high-elasticity acrylate grouting material.

7. The use of the high-resilience acrylate grouting material according to claim 1 in the field of water leakage control and repair of deformation joints.

Technical Field

The invention belongs to the technical field of chemical grouting, and particularly relates to a high-elasticity acrylate grouting material, and a preparation method and application thereof.

Background

The acrylate grouting material has the advantages of low initial viscosity of slurry, good grouting performance, adjustable gel time, good elasticity of gel, water absorption expansion and the like, and is widely used for curtain grouting, water leakage blocking and water leakage treatment and repair of deformation joints. For these different applications, there are a variety of acrylate grouting materials products abroad, differing primarily in the elongation at break and water-swell index of the gel, such as the GELACRYL series of acrylate products from denneff, germany: gelacryl type elongation at break is 50%, and water-swelling rate is 50%; the Gelacryl Superflex type elongation at break is 300%, and the water-swelling rate is 150%. The elongation at break index of products in foreign countries can reach more than 700 percent, and the product has very good effects of treating and repairing the water leakage of deformation joints. The elongation at break index of the domestic acrylate grouting material product can only reach about 200% at most at present, and the difference is large compared with foreign products, so that the domestic acrylate grouting material product is blocked from being applied to the treatment and repair of water leakage of deformation joints, and when the project is in demand, imported products are generally adopted, but the imported products are high in price, and the construction cost of the project is greatly increased.

Disclosure of Invention

In order to overcome the defects and shortcomings in the prior art, the invention aims to provide the high-elasticity acrylate grouting material, the high-elasticity acrylate grouting material has the elongation at break of 900 percent and the water swelling rate of not less than 60 percent, is excellent in bonding with concrete, meets the requirements of the industrial standard JC/T2037-2010 acrylate grouting material, can replace imported products to be applied to treatment and repair of leakage water of deformation joints, and can also be applied to curtain grouting and water leakage blocking.

The invention also aims to provide a preparation method of the high-elasticity acrylate grouting material.

The invention also aims to provide application of the high-elasticity acrylate grouting material.

The purpose of the invention is realized by the following technical scheme:

a high-elasticity acrylate grouting material is composed of a component A and a component B in a volume ratio of 1: 1; the component A is prepared from the following raw materials in parts by weight: 34.8-39 parts of acrylic acid, 9.6-15.7 parts of alkaline substance, 1.0-1.7 parts of cross-linking agent, 0.6-1.6 parts of accelerator and 42.7-54 parts of distilled water A; the component B is prepared from the following raw materials in parts by weight: 0.6-1.6 parts of initiator and 98.4-99.4 parts of distilled water B; the alkaline substance is magnesium oxide or magnesium hydroxide; the cross-linking agent is a water-soluble aziridine cross-linking agent; the accelerant is at least one of diethanolamine and triethanolamine; the initiator is at least one of potassium persulfate, sodium persulfate and ammonium persulfate.

Preferably, the aziridine crosslinking agent is at least one of trimethylolpropane-tris [3- (2-methylaziridinyl) ] propionate, trimethylolpropane-tris (3-aziridinyl) propionate, and pentaerythritol-tris (3-aziridinyl) propionate).

Preferably, the aziridine crosslinking agent is a commercially available aziridine crosslinking agent XR-100.

Preferably, the accelerator is triethanolamine.

Preferably, the initiator is sodium persulfate.

The preparation method of the high-elasticity acrylate grouting material comprises the following steps:

(1) uniformly mixing acrylic acid and distilled water A, adding alkaline substances in batches under the stirring condition, controlling the temperature of a reaction system to be not more than 50 ℃ by adopting cooling water, and reacting for 30min after all the alkaline substances are added to obtain a magnesium acrylate solution; adding a cross-linking agent and an accelerant into the magnesium acrylate solution, and uniformly mixing to obtain a component A;

(2) dissolving an initiator in distilled water B, and uniformly mixing to obtain a component B;

(3) and uniformly mixing the component A and the component B according to the volume ratio of 1:1 to prepare the high-elasticity acrylate grouting material.

The high-elasticity acrylate grouting material is applied to the field of water leakage treatment and repair of deformation joints.

Compared with the prior art, the invention has the following advantages and effects:

the elongation at break of the high-elasticity acrylate grouting material prepared by the invention reaches up to 900 percent, is far higher than that of the current domestic acrylate grouting material, and exceeds the highest index of the elongation at break of the imported product; the high-elasticity acrylate grouting material prepared by the invention has a water swelling rate of more than or equal to 60 percent, is excellent in bonding with concrete, meets the requirements of an industrial standard JC/T2037-2010 acrylate grouting material, can replace imported products to be applied to treatment and repair of water leakage of deformation joints, and can also be applied to curtain grouting and water leakage blocking.

Drawings

FIG. 1 is a graph of gel water-swell rate over time.

Detailed Description

The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.

Example 1

(1) Uniformly mixing 34.8g of acrylic acid and 54g of distilled water; under the condition of stirring, adding 9.6g of magnesium oxide in batches, controlling the temperature of a reaction system to be not more than 50 ℃ by adopting cooling water, and reacting for 30min after all the magnesium oxide is added to obtain a magnesium acrylate solution; adding 1.7g of aziridine cross-linking agent XR-100 and 0.6g of triethanolamine into the magnesium acrylate solution, and uniformly mixing to obtain a component A;

(2) dissolving 1.6g of sodium persulfate in 98.4g of distilled water, and uniformly mixing to obtain a component B;

(3) when the high-elasticity acrylate grouting material is used, the component A and the component B are uniformly mixed according to the volume ratio of 1:1 to prepare the high-elasticity acrylate grouting material.

Example 2

(1) Mixing 37g of acrylic acid and 50.5g of distilled water uniformly; under the condition of stirring, adding 10.2g of magnesium oxide in batches, controlling the temperature of a reaction system to be not more than 50 ℃ by adopting cooling water, and reacting for 30min after all the magnesium oxide is added to obtain a magnesium acrylate solution; adding 1.3g of aziridine cross-linking agent XR-100 and 1.0g of triethanolamine into the magnesium acrylate solution, and uniformly mixing to obtain a component A;

(2) dissolving 1.0g of sodium persulfate in 99g of distilled water, and uniformly mixing to obtain a component B;

(3) when the high-elasticity acrylate grouting material is used, the component A and the component B are uniformly mixed according to the volume ratio of 1:1 to prepare the high-elasticity acrylate grouting material.

Example 3

(1) Mixing 39g acrylic acid and 42.7g distilled water; under the condition of stirring, adding 15.7g of magnesium hydroxide in batches, controlling the temperature of a reaction system to be not more than 50 ℃ by adopting cooling water, and reacting for 30min after all the magnesium hydroxide is added to obtain a magnesium acrylate solution; adding 1.0g of aziridine crosslinking agent XR-100 and 1.6g of triethanolamine into the magnesium acrylate solution, and uniformly mixing to obtain a component A;

(2) dissolving 0.6g of sodium persulfate in 99.4g of distilled water, and uniformly mixing to obtain a component B;

(3) when the high-elasticity acrylate grouting material is used, the component A and the component B are uniformly mixed according to the volume ratio of 1:1 to prepare the high-elasticity acrylate grouting material.

Comparative example 1

(1) Mixing 39g acrylic acid and 42.7g distilled water; under the condition of stirring, adding 15.7g of magnesium hydroxide in batches, controlling the temperature of a reaction system to be not more than 50 ℃ by adopting cooling water, and reacting for 30min after all the magnesium hydroxide is added to obtain a magnesium acrylate solution; adding 1.0g of diethylene glycol diacrylate and 1.6g of triethanolamine into the magnesium acrylate solution, and uniformly mixing to obtain a component A;

(2) dissolving 0.6g of sodium persulfate in 99.4g of distilled water, and uniformly mixing to obtain a component B;

(3) when the acrylate grouting material is used, the component A and the component B are uniformly mixed according to the volume ratio of 1:1 to prepare the acrylate grouting material.

Comparative example 2

The acrylic acid salt grouting material product produced by a commercial tin-free Bin king chemical plant is prepared into slurry according to the product specification: adding 1.6g of accelerator into 98.4g of main agent, and uniformly mixing to obtain a component A; dissolving 1.6g of initiator in 98.4g of distilled water, and uniformly mixing to obtain a component B; when the acrylate grouting material is used, the component A and the component B are uniformly mixed according to the volume ratio of 1:1 to prepare the acrylate grouting material.

Comparative example 3

Acrylate chemical injection slurry variaotite, imported from germany, the slurry being formulated according to product specifications: 2.0g A₂Adding 98g A₁Mixing uniformly to obtain a component A; dissolving the 1.0g B material in 99g of distilled water, and uniformly mixing to obtain a component B; when the acrylate grouting material is used, the component A and the component B are uniformly mixed according to the volume ratio of 1:1 to prepare the acrylate grouting material.

Effects of the embodiment

The initial viscosity, density, pH value, gel time, compressive strength of sand consolidation body and extrusion damage resistance ratio drop of the slurry of the acrylate grouting material prepared in the examples 1-3 and the comparative examples 1-3 are tested according to JC/T1041-2007, and the test results are shown in Table 1; gel Water-swell Rate testing was performed with reference to JC/T1041-2007, where the gel Water-swell rate as a function of time is shown in FIG. 1. The gel elongation at break test method is as follows: preparing an organic silica gel mould with the size of a cavity of 100mm 20mm 10mm and a standard mortar block with the size of 30mm 20mm 10mm, putting the two mortar blocks into the cavity of the organic silica gel mould, forming a cavity of 40mm 20mm 10mm in the middle, casting an acrylate grouting material into the cavity, covering the gel with a preservative film to prevent the moisture in the gel from evaporating, demoulding the gel together with the mortar block after 1d, and then performing a tensile test by using a WDW3020 micro-control electronic universal testing machine, wherein the tensile speed is 500mm/min, and the elongation when the gel breaks or debonds from the standard mortar block is the elongation at break.

TABLE 1 Properties of high-elastic acrylate grouting materials

As can be seen from the data in Table 1, the high-elasticity acrylate grouting material, the domestic acrylate grouting material and the imported acrylate grouting material prepared by the invention have no obvious difference in initial viscosity, density, gel time and pH value; the gel strength and the extrusion damage resistance ratio of the high-elasticity acrylate grouting material are equivalent to those of imported products, and are obviously higher than those of domestic acrylate grouting materials; the elongation at break of the high-elastic acrylate grouting material is more than or equal to 800 percent and can reach 900 percent at most, and the elongation at break is obviously higher than that of imported products and is far higher than that of domestic acrylate grouting materials. The cross-linking agent diethylene glycol diacrylate adopted in the comparative example 1 is an environment-friendly cross-linking agent commonly used in domestic acrylate grouting materials, and as can be seen from the table 1, the initial viscosity, the slurry density, the pH value, the gelation time, the compressive strength of a sand consolidation body and the extrusion damage resistance ratio drop of the acrylate grouting material in the comparative example 1 are not obviously different from those of imported products, but the elongation at break is far lower than that of the imported products. In addition, the water-swelling rate of the domestic acrylate grouting material is stabilized after about 7 days, and the grouting material can slightly shrink after being soaked, which is caused by the fact that unreacted substances in the gel are dissolved in water. The high resilience acrylate grouting material of the present invention is similar to imported products in that the water-swellable flow rate of the gel increases over time within 1 month.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.