阅读说明：本技术 一种混凝土防水抗裂剂及其制备方法 (Concrete waterproof anti-cracking agent and preparation method thereof ) 是由 杨井英 于 2020-12-22 设计创作，主要内容包括：本发明公开了一种混凝土防水抗裂剂,其特征在于,由如下按重量份计的各组分制成：多孔β-环糊精交联聚合物纳米纤维3-6份、铝土矿粉10-15份、含磺酸基的纤维材料4-7份、明矾石20-30份、高炉矿渣8-12份、松香基超支化聚酯2-4份、磺酸盐改性2-氨基腺嘌呤核苷5-10份、纳米硼纤维3-5份、表面亲水性猪毛纤维2-5份。本发明还提供了一种所述混凝土防水抗裂剂的制备方法。本发明公开的混凝土防水抗裂剂防水抗裂效果显著,掺量少,能有效改善混凝土的综合性能,环保性好。(The invention discloses a concrete waterproof anti-cracking agent which is characterized by being prepared from the following components in parts by weight: 3-6 parts of porous beta-cyclodextrin cross-linked polymer nano fiber, 10-15 parts of bauxite powder, 4-7 parts of a fiber material containing sulfonic groups, 20-30 parts of alunite, 8-12 parts of blast furnace slag, 2-4 parts of rosin-based hyperbranched polyester, 5-10 parts of sulfonate modified 2-amino adenine nucleoside, 3-5 parts of nano boron fiber and 2-5 parts of surface hydrophilic pig hair fiber. The invention also provides a preparation method of the concrete waterproof anti-cracking agent. The concrete waterproof anti-cracking agent disclosed by the invention has the advantages of obvious waterproof anti-cracking effect, small mixing amount, capability of effectively improving the comprehensive performance of concrete and good environmental friendliness.)

1. The concrete waterproof anti-cracking agent is characterized by being prepared from the following components in parts by weight: 3-6 parts of porous beta-cyclodextrin cross-linked polymer nano fiber, 10-15 parts of bauxite powder, 4-7 parts of a fiber material containing sulfonic groups, 20-30 parts of alunite, 8-12 parts of blast furnace slag, 2-4 parts of rosin-based hyperbranched polyester, 5-10 parts of sulfonate modified 2-amino adenine nucleoside, 3-5 parts of nano boron fiber and 2-5 parts of surface hydrophilic pig hair fiber.

2. The waterproof and anti-cracking agent for concrete as claimed in claim 1, wherein the bauxite powder has a particle size of 1000-1300 mesh; the particle size of the alunite is 900-1200 meshes; the particle size of the blast furnace slag is 1000-1200 meshes.

3. The concrete waterproof anti-cracking agent as claimed in claim 1, wherein the nano boron fiber has a diameter of 200-500nm and an aspect ratio of (10-15): 1.

4. The waterproof and anti-cracking agent for concrete according to claim 1, wherein the preparation method of the sulfonate modified 2-amino adenosine comprises the following steps: adding 2-amino adenine and 3-chloro-2-hydroxy propanesulfonic acid into an organic solvent, stirring and reacting for 3-5 hours at 55-70 ℃, then performing rotary evaporation to remove the solvent, adding the crude product into water, then adding aluminum hydroxide into the water, adjusting the pH value to 6-8, and then performing rotary evaporation to remove the water to obtain the sulfonate modified 2-amino adenine nucleoside.

5. The waterproof and anti-cracking agent for concrete according to claim 4, wherein the molar ratio of the 2-amino adenine, the 3-chloro-2-hydroxypropanesulfonic acid and the organic solvent is 1:4 (15-25).

6. The waterproof and crack-resistant agent for concrete according to claim 4, wherein the organic solvent is at least one of N, N-dimethylformamide, N-dimethylacetamide and N-methylpyrrolidone.

7. The concrete waterproof anti-cracking agent according to claim 4, wherein the mass ratio of the crude product to water is 1 (3-5).

8. A method for preparing the concrete waterproof anti-cracking agent according to any one of claims 1 to 7, which is characterized by comprising the following steps: the components are uniformly mixed according to the parts by weight, milled and sieved by a 200-mesh and 300-mesh sieve, and then added into a stirrer together to be fully and uniformly stirred to form a concrete waterproof anti-cracking agent product, and then bagged.

Technical Field

The invention relates to the technical field of building materials, in particular to a concrete waterproof anti-cracking agent and a preparation method thereof.

Background

With the rapid development of economy, the construction industry of China is also rapidly developed, and the use amount of concrete is greatly increased. The concrete is called concrete for short, and is a general name of engineering composite materials formed by cementing aggregates into a whole by using cementing materials. The concrete is one of the most important civil engineering materials in the present generation, has the characteristics of rich raw materials, low price and simple production process, simultaneously, the hardened concrete has the characteristics of high compressive strength, good durability, wide strength grade range and the like, and is widely applied to building engineering projects.

The concrete belongs to hydraulic materials, and in the process of preparation, hardening and use, gaps are formed in the concrete and the concrete is dehydrated and dried, so that the concrete has adverse effects of cracking, permeation, reinforcement corrosion, prestress loss and the like. In order to overcome the above-mentioned disadvantages of concrete, a certain amount of functional additives, such as water-proofing agent, expanding agent, anti-cracking agent, etc., are usually added to the concrete, and the expanding components in such additives can compensate the shrinkage of the concrete, thereby achieving the purpose of preventing the concrete from drying and cracking. The expansion component in the admixture provided by the prior art is usually expansion clinker calcined at high temperature of 1200-1420 ℃, and the calcination of the expansion clinker not only needs to consume huge energy, but also can cause serious influence on the environmental quality. In addition, the waterproof anti-cracking agent for the concrete on the market has single function and large mixing amount, and has certain negative influence on the comprehensive performance of the concrete.

For example, the Chinese patent with application number 201110219088.2 discloses a high-efficiency concrete composite admixture, which mainly comprises: 75 to 90 percent of beta-sodium sulfonate formaldehyde condensate; 4 to 15 percent of sodium sulfate; 5 percent of pine cigarettes; 1% -2% of magnesium powder; 0.5 to 3.5 percent of alkylbenzene sulfonate; 1 to 2 percent of triethanolamine; 0.5 to 3.5 percent of silicone; 0.5 to 1.0 percent of calcium chloride. The high-efficiency concrete composite additive has good effects of improving the frost resistance, the impermeability and the corrosion resistance of concrete, and has the characteristics of higher water reducing rate and segregation resistance. However, the use of the β -based sodium sulfonate formaldehyde condensate leads to poor environmental protection; because the synergistic effect among the components is poor, the mixing amount of the concrete is large, and the promotion effect on the waterproof and anti-permeability performance and the mechanical strength of the concrete needs to be further improved.

Therefore, the concrete waterproof anti-cracking agent with obvious waterproof anti-cracking effect and less mixing amount can be developed, the comprehensive performance of concrete can be effectively improved, the environmental protection property is good, the concrete waterproof anti-cracking agent meets the market demand, and the concrete waterproof anti-cracking agent has wide market value and application prospect and plays a very important role in promoting the development of the building material industry.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides the concrete waterproof anti-cracking agent which has obvious waterproof anti-cracking effect, small mixing amount, effective improvement on the comprehensive performance of concrete and good environmental protection. Meanwhile, the invention also provides a preparation method of the concrete waterproof anti-cracking agent, and the preparation method is simple and easy to implement, convenient to operate and control, free of special equipment, high in production efficiency and finished product qualification rate, and suitable for continuous large-scale production.

In order to achieve the aim, the invention adopts the technical scheme that the concrete waterproof anti-cracking agent is characterized by being prepared from the following components in parts by weight: 3-6 parts of porous beta-cyclodextrin cross-linked polymer nano fiber, 10-15 parts of bauxite powder, 4-7 parts of a fiber material containing sulfonic groups, 20-30 parts of alunite, 8-12 parts of blast furnace slag, 2-4 parts of rosin-based hyperbranched polyester, 5-10 parts of sulfonate modified 2-amino adenine nucleoside, 3-5 parts of nano boron fiber and 2-5 parts of surface hydrophilic pig hair fiber.

Preferably, the porous beta-cyclodextrin cross-linked polymer nanofiber is prepared by the preparation method of beta-CDNFs in chinese patent application No. 202010119377.4 in example 1.

Preferably, the particle size of the bauxite powder is 1000-1300 meshes; the particle size of the alunite is 900-1200 meshes; the particle size of the blast furnace slag is 1000-1200 meshes.

Preferably, the diameter of the nano boron fiber is 200-500nm, and the length-diameter ratio is (10-15): 1.

Preferably, the fiber material containing sulfonic acid groups is the fiber material containing sulfonic acid groups prepared according to the preparation method of acrylic fibers containing sulfonic acid groups in the Chinese patent application No. 200910065345.4, example 1.

Preferably, the preparation method of the rosin-based hyperbranched polyester is described in chinese patent application No. 201210246784.7, example 3; the preparation method of the surface hydrophilic pig hair fiber is referred to Chinese patent application No. 201710130395.0, namely patent example 1.

Preferably, the preparation method of the sulfonate modified 2-amino adenine nucleoside comprises the following steps: adding 2-amino adenine and 3-chloro-2-hydroxy propanesulfonic acid into an organic solvent, stirring and reacting for 3-5 hours at 55-70 ℃, then performing rotary evaporation to remove the solvent, adding the crude product into water, then adding aluminum hydroxide into the water, adjusting the pH value to 6-8, and then performing rotary evaporation to remove the water to obtain the sulfonate modified 2-amino adenine nucleoside.

Preferably, the molar ratio of the 2-amino adenine to the 3-chloro-2-hydroxy propanesulfonic acid to the organic solvent is 1:4 (15-25).

Preferably, the organic solvent is at least one of N, N-dimethylformamide, N-dimethylacetamide and N-methylpyrrolidone.

Preferably, the mass ratio of the crude product to the water is 1 (3-5).

Another object of the present invention is to provide a method for preparing the concrete waterproof anti-cracking agent, which is characterized by comprising the following steps: the components are uniformly mixed according to the parts by weight, milled and sieved by a 200-mesh and 300-mesh sieve, and then added into a stirrer together to be fully and uniformly stirred to form a concrete waterproof anti-cracking agent product, and then bagged.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:

1) the preparation method of the concrete waterproof anti-cracking agent provided by the invention is simple and easy to implement, convenient to operate and control, free of special equipment, high in production efficiency and finished product qualification rate, and suitable for continuous large-scale production.

2) The concrete waterproof anti-cracking agent provided by the invention overcomes the defects that the waterproof anti-cracking agent in the prior art is generally calcined at a high temperature of 1200-1420 ℃, and the calcined expanded clinker not only needs to consume huge energy, but also can cause serious influence on the environmental quality; the waterproof anti-cracking agent for the concrete on the market has the defects of single function, large mixing amount and certain negative influence on the comprehensive performance of the concrete; through the synergistic effect of the components, the prepared concrete waterproof anti-cracking agent has obvious waterproof anti-cracking effect and less mixing amount, can effectively improve the comprehensive performance of concrete, and has good environmental protection property.

3) The concrete waterproof anti-cracking agent provided by the invention has the beneficial effects that the added porous beta-cyclodextrin cross-linked polymer nano-fiber, alunite and bauxite powder have synergistic effect, and the beneficial properties of organic and inorganic expansion components are combined, so that the concrete waterproof anti-cracking agent can compensate the generated shrinkage stress through hydration expansion of the concrete waterproof anti-cracking agent while keeping water and resisting dry cracking, and can obviously improve the anti-cracking performance of concrete under the condition of low mixing amount.

4) The concrete waterproof anti-cracking agent provided by the invention has the synergistic effect of the porous beta-cyclodextrin cross-linked polymer nano-fiber, the nano-boron fiber, the surface hydrophilic pig hair fiber and the fiber material containing sulfonic acid group, so that a firm fiber support system can be formed, microcracks are filled, and the anti-permeability and waterproof effects of concrete are improved. The surface hydrophilic pig hair fiber and the hydrophilic group on the surface of the fiber material containing the sulfonic group enable the expansion particles to be dispersed in the concrete, so that the effects of dispersion strengthening, plasticity improvement and stability improvement are achieved, the expansion component is promoted to be uniformly dispersed in the concrete, the bonding force between the expansion component and other components is improved, the mechanical property of the expansion component is improved, the uniformity of a base material is not damaged, and the long-term effect can be kept. The introduction of the sulfonic group can also play a role in reducing water and playing an important role in maintaining slump; because the concrete has negative charges and is adsorbed on the surface of cement particles, the early-stage dispersing capacity of the cement particles is improved and the comprehensive performance of the concrete is improved due to the action of electrostatic repulsion. The hydrophilic surface pig hair fiber has rich material source and can lower cost effectively.

5) The added blast furnace slag can effectively reduce the consumption of cement in the concrete, thereby reducing the reaction hydration heat in the concrete, reducing the internal heat insulation temperature and concrete cracks of the concrete and improving the compactness of the concrete; the addition of the rosin-based hyperbranched polyester and the sulfonate modified 2-amino adenine nucleoside can strengthen the effect, further improve the comprehensive performance, and ensure that the concrete has excellent compressive strength, frost resistance and shrinkage resistance.

Detailed Description

In order to make the technical solutions of the present invention better understood and make the above features, objects, and advantages of the present invention more comprehensible, the present invention is further described with reference to the following examples. The examples are intended to illustrate the invention only and are not intended to limit the scope of the invention.

The porous beta-cyclodextrin cross-linked polymer nanofiber in the following embodiment of the invention is the porous beta-cyclodextrin cross-linked polymer nanofiber prepared by the preparation method of beta-CDNFs in Chinese patent application No. 202010119377.4 in patent embodiment 1; the fiber material containing sulfonic groups is prepared by the preparation method of acrylic fibers containing sulfonic groups in the Chinese patent application No. 200910065345.4 in the embodiment 1; the preparation method of the rosin-based hyperbranched polyester is disclosed in Chinese patent application No. 201210246784.7, namely, example 3; the preparation method of the surface hydrophilic pig hair fiber is disclosed in the Chinese patent application No. 201710130395.0, example 1; the other raw materials used were all purchased commercially.

Example 1

The concrete waterproof anti-cracking agent is characterized by being prepared from the following components in parts by weight: 3 parts of porous beta-cyclodextrin cross-linked polymer nano fiber, 10 parts of bauxite powder, 4 parts of a fiber material containing sulfonic groups, 20 parts of alunite, 8 parts of blast furnace slag, 2 parts of rosin-based hyperbranched polyester, 5 parts of sulfonate-modified 2-amino adenine nucleoside, 3 parts of nano boron fiber and 2 parts of surface hydrophilic pig hair fiber.

The particle size of the bauxite powder is 1000 meshes; the particle size of the alunite is 900 meshes; the grain size of the blast furnace slag is 1000 meshes; the diameter of the nano boron fiber is 200nm, and the length-diameter ratio is 10: 1.

The preparation method of the sulfonate modified 2-amino adenine nucleoside comprises the following steps: adding 2-amino adenine and 3-chloro-2-hydroxy propanesulfonic acid into an organic solvent, stirring and reacting for 3 hours at 55 ℃, then performing rotary evaporation to remove the solvent, adding the crude product into water, then adding aluminum hydroxide, adjusting the pH value to 6, and then performing rotary evaporation to remove water to obtain sulfonate modified 2-amino adenine nucleoside; the molar ratio of the 2-aminoadenine to the 3-chloro-2-hydroxypropanesulfonic acid to the organic solvent is 1:4: 15; the organic solvent is N, N-dimethylformamide; the mass ratio of the crude product to the water is 1:3.

The preparation method of the concrete waterproof anti-cracking agent is characterized by comprising the following steps: the components are uniformly mixed according to the parts by weight, ground and sieved by a 200-mesh sieve, then added into a stirrer together and fully stirred uniformly to form a concrete waterproof anti-cracking agent product, and then bagged.

Example 2

The concrete waterproof anti-cracking agent is characterized by being prepared from the following components in parts by weight: 4 parts of porous beta-cyclodextrin cross-linked polymer nano fiber, 12 parts of bauxite powder, 5 parts of fiber material containing sulfonic groups, 22 parts of alunite, 9 parts of blast furnace slag, 2.5 parts of rosin-based hyperbranched polyester, 6 parts of sulfonate modified 2-amino adenine nucleoside, 3.5 parts of nano boron fiber and 3 parts of surface hydrophilic pig hair fiber.

The particle size of the bauxite powder is 1100 meshes; the particle size of the alunite is 1000 meshes; the grain size of the blast furnace slag is 1050 meshes; the diameter of the nano boron fiber is 300nm, and the length-diameter ratio is 12: 1.

The preparation method of the sulfonate modified 2-amino adenine nucleoside comprises the following steps: adding 2-amino adenine and 3-chloro-2-hydroxy propanesulfonic acid into an organic solvent, stirring and reacting for 3.5 hours at the temperature of 60 ℃, then carrying out rotary evaporation to remove the solvent, adding the crude product into water, then adding aluminum hydroxide into the water, adjusting the pH value to 6.5, and then carrying out rotary evaporation to remove the water to obtain the sulfonate modified 2-amino adenine nucleoside.

The molar ratio of the 2-aminoadenine, the 3-chloro-2-hydroxypropanesulfonic acid and the organic solvent is 1:4: 18; the organic solvent is N, N-dimethylacetamide; the mass ratio of the crude product to the water is 1: 3.5.

The preparation method of the concrete waterproof anti-cracking agent is characterized by comprising the following steps: the components are uniformly mixed according to the parts by weight, ground and sieved by a 230-mesh sieve, then added into a stirrer together and fully stirred uniformly to form a concrete waterproof anti-cracking agent product, and then bagged.

Example 3

The concrete waterproof anti-cracking agent is characterized by being prepared from the following components in parts by weight: 4.5 parts of porous beta-cyclodextrin cross-linked polymer nano fiber, 13 parts of bauxite powder, 5.5 parts of a fiber material containing sulfonic groups, 25 parts of alunite, 10 parts of blast furnace slag, 3 parts of rosin-based hyperbranched polyester, 7.5 parts of sulfonate modified 2-amino adenine nucleoside, 4 parts of nano boron fiber and 3.5 parts of surface hydrophilic pig hair fiber.

The particle size of the bauxite powder is 1150 meshes; the particle size of the alunite is 1100 meshes; the grain size of the blast furnace slag is 1100 meshes; the diameter of the nano boron fiber is 350nm, and the length-diameter ratio is 13: 1.

The preparation method of the sulfonate modified 2-amino adenine nucleoside comprises the following steps: adding 2-amino adenine and 3-chloro-2-hydroxy propanesulfonic acid into an organic solvent, stirring and reacting for 4 hours at 67 ℃, then performing rotary evaporation to remove the solvent, adding the crude product into water, adding aluminum hydroxide into the water, adjusting the pH value to 7, and then performing rotary evaporation to remove water to obtain the sulfonate modified 2-amino adenine nucleoside.

The molar ratio of the 2-aminoadenine to the 3-chloro-2-hydroxypropanesulfonic acid to the organic solvent is 1:4: 20; the organic solvent is N-methyl pyrrolidone; the mass ratio of the crude product to the water is 1:4.

The preparation method of the concrete waterproof anti-cracking agent is characterized by comprising the following steps: the components are uniformly mixed according to the parts by weight, ground and sieved by a 250-mesh sieve, and then added into a stirrer together to be fully and uniformly stirred to form a concrete waterproof anti-cracking agent product, and the concrete waterproof anti-cracking agent product is bagged.

Example 4

The concrete waterproof anti-cracking agent is characterized by being prepared from the following components in parts by weight: 5.5 parts of porous beta-cyclodextrin cross-linked polymer nano fiber, 14 parts of bauxite powder, 6.5 parts of a fiber material containing sulfonic groups, 28 parts of alunite, 11 parts of blast furnace slag, 3.5 parts of rosin-based hyperbranched polyester, 9 parts of sulfonate modified 2-amino adenine nucleoside, 4.5 parts of nano boron fiber and 4.5 parts of surface hydrophilic pig hair fiber.

The particle size of the bauxite powder is 1250 meshes; the particle size of the alunite is 1150 meshes; the grain size of the blast furnace slag is 1150 meshes; the diameter of the nano boron fiber is 450nm, and the length-diameter ratio is 14: 1.

The preparation method of the sulfonate modified 2-amino adenine nucleoside comprises the following steps: adding 2-aminoadenine and 3-chloro-2-hydroxypropanesulfonic acid into an organic solvent, stirring and reacting for 4.5 hours at 68 ℃, then performing rotary evaporation to remove the solvent, adding the crude product into water, adding aluminum hydroxide into the water, adjusting the pH value to 7.5, and then performing rotary evaporation to remove water to obtain sulfonate modified 2-aminoadenine nucleoside; the molar ratio of the 2-aminoadenine, the 3-chloro-2-hydroxypropanesulfonic acid and the organic solvent is 1:4: 24; the organic solvent is formed by mixing N, N-dimethylformamide, N-dimethylacetamide and N-methylpyrrolidone according to a mass ratio of 1:3: 5; the mass ratio of the crude product to the water is 1: 4.5.

The preparation method of the concrete waterproof anti-cracking agent is characterized by comprising the following steps: the components are uniformly mixed according to the parts by weight, ground and sieved by a 280-mesh sieve, and then added into a stirrer together to be fully and uniformly stirred to form a concrete waterproof anti-cracking agent product, and the concrete waterproof anti-cracking agent product is bagged.

Example 5

The concrete waterproof anti-cracking agent is characterized by being prepared from the following components in parts by weight: 6 parts of porous beta-cyclodextrin cross-linked polymer nano fiber, 15 parts of bauxite powder, 7 parts of a fiber material containing sulfonic groups, 30 parts of alunite, 12 parts of blast furnace slag, 4 parts of rosin-based hyperbranched polyester, 10 parts of sulfonate modified 2-amino adenine nucleoside, 5 parts of nano boron fiber and 5 parts of surface hydrophilic pig hair fiber.

The particle size of the bauxite powder is 1300 meshes; the particle size of the alunite is 1200 meshes; the particle size of the blast furnace slag is 1200 meshes; the diameter of the nano boron fiber is 500nm, and the length-diameter ratio is 15: 1.

The preparation method of the sulfonate modified 2-amino adenine nucleoside comprises the following steps: adding 2-amino adenine and 3-chloro-2-hydroxy propanesulfonic acid into an organic solvent, stirring and reacting for 5 hours at 70 ℃, then performing rotary evaporation to remove the solvent, adding the crude product into water, then adding aluminum hydroxide, adjusting the pH value to 8, and then performing rotary evaporation to remove water to obtain sulfonate modified 2-amino adenine nucleoside; the molar ratio of the 2-aminoadenine, the 3-chloro-2-hydroxypropanesulfonic acid and the organic solvent is 1:4: 25; the organic solvent is N, N-dimethylformamide; the mass ratio of the crude product to the water is 1: 5.

The preparation method of the concrete waterproof anti-cracking agent is characterized by comprising the following steps: the components are uniformly mixed according to the parts by weight, ground and sieved by a 300-mesh sieve, then added into a stirrer together and fully stirred uniformly to form a concrete waterproof anti-cracking agent product, and then bagged.

Comparative example 1

The present example provides a concrete waterproof crack-resistant agent, the formulation and preparation method of which are substantially the same as those of example 1, except that the porous beta-cyclodextrin crosslinked polymer nanofibers are not added.

Comparative example 2

This example provides a concrete water-proofing crack-resistant agent, the formulation and preparation method of which are substantially the same as those of example 1, except that no sulfonate-modified 2-aminoadenine nucleoside is added.

Comparative example 3

This example provides a concrete water-proofing crack-resistant agent, whose formulation and preparation method are substantially the same as those of example 1, except that surface hydrophilic pig hair fibers and fiber materials containing sulfonic acid groups are not added.

Comparative example 4

The formula and the preparation method of the concrete waterproof anti-cracking agent are basically the same as those of the concrete waterproof anti-cracking agent in example 1, except that bauxite powder and rosin-based hyperbranched polyester are not added.

Comparative example 5

The present example provides a concrete waterproof crack-resistant agent, the formulation and preparation method of which are substantially the same as those of example 1, except that blast furnace slag and nano boron fiber are not added.

The concrete waterproof crack-resistant agents obtained in the above examples 1 to 5 and comparative examples 1 to 5 were subjected to performance tests, the test results are shown in table 1, and the test methods are as follows:

mixing the concrete waterproof anti-cracking agent of each example into common concrete for performance test, wherein the mixing amount of the concrete anti-cracking agent is 2%, and the common concrete is prepared by mixing cement, water, stones and sand according to the mass ratio of 1:3:18: 12; the control group is common concrete without adding a concrete waterproof anti-cracking agent. The concrete compression strength and bending strength tests are carried out according to GB/T50081-2002 standard of common concrete mechanical property test method, and the size of a test piece is the standard size specified in the standard; the early crack resistance performance test is carried out according to appendix A in T/CECS10001-2017 crack-resistant and impervious composite material used in concrete.

TABLE 1

As can be seen from table 1, the concrete waterproof crack resistant agent disclosed in the embodiment of the present invention has more excellent crack resistance and mechanical strength than the concrete waterproof crack resistant agent in the comparative example, which is a result of the synergistic effect of the components.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.