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Concrete crack resistance reinforcing additive and preparation method thereof

An additive and concrete technology, applied in the field of construction, can solve the problems of easy cracks, high brittleness, and low bending strength of concrete, and achieve high tensile strength and compressive strength, which is conducive to industrial production, crack resistance and impermeability good performance

Active Publication Date: 2018-10-23
广东龙腾建材科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the characteristics of its own structure, concrete materials often leak during use, especially for those underground and underwater structural projects, which seriously affects and restricts the application of concrete materials.
At the same time, concrete has low flexural strength and high brittleness, and is prone to cracks or even breaks during use, which seriously affects the service life and safety of buildings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A concrete anti-crack strengthening additive, comprising the following raw materials in parts by weight: 16 parts of chitosan, 15 parts of sodium 4-cumene sulfonate, 12 parts of 2-mercaptobenzothiazole, methyl dihydrojasmonate 6 parts, 11 parts of p-nitrosoxylidine, 7 parts of isooctyl acetate.

[0026] A preparation method of a concrete anti-crack strengthening additive, the specific steps are: (1) adding p-nitrosoxylidine, chitosan and methyl dihydrojasmonate into a reaction kettle, and adding 20 parts of 85% Ethanol solution, under nitrogen protection, placed at -70°C and stirred for 2 hours; (2) Mix 2-mercaptobenzothiazole and isooctyl acetate, add 2 times the weight of the mixture in 75% ethanol solution, and mix evenly; Liquid one; (3) Add the mixed solution dropwise to the reaction kettle of step (1), and the rate of addition is 100 drops / min; (4) The reaction kettle is warmed up to -5°C, and 4-sodium cumenesulfonate is added, Stir and react for 1 hour; (5) cont...

Embodiment 2

[0028] A concrete anti-crack strengthening additive, comprising the following raw materials in parts by weight: 32 parts of chitosan, 22 parts of sodium 4-cumene sulfonate, 19 parts of 2-mercaptobenzothiazole, methyl dihydrojasmonate 17 parts, 17 parts of p-nitrosoxylidine, and 15 parts of isooctyl acetate.

[0029] A preparation method of a concrete anti-crack strengthening additive, the specific steps are: (1) adding p-nitrosoxylidine, chitosan and methyl dihydrojasmonate into a reaction kettle, and adding 35 parts of 85% Ethanol solution, under nitrogen protection, placed at -70°C and stirred for 3 hours; (2) Mix 2-mercaptobenzothiazole and isooctyl acetate, add 4 times the weight of the mixture in 75% ethanol solution, and mix uniformly; Liquid one; (3) Add the mixed solution dropwise to the reaction kettle of step (1), and the rate of addition is 200 drops / min; (4) The reaction kettle is warmed up to -5°C, adding 4-sodium cumene sulfonate, Stir and react for 3 hours; (5)...

Embodiment 3

[0031] A concrete anti-crack strengthening additive, comprising the following raw materials in parts by weight: 25 parts of chitosan, 17 parts of sodium 4-cumene sulfonate, 15 parts of 2-mercaptobenzothiazole, methyl dihydrojasmonate 11 parts, 13 parts of p-nitrosoxylidine, and 11 parts of isooctyl acetate.

[0032] A preparation method of a concrete anti-crack strengthening additive, the specific steps are: (1) adding p-nitrosoxylidine, chitosan and methyl dihydrojasmonate into a reaction kettle, and adding 25 parts of 85% Ethanol solution, under nitrogen protection, placed at -70°C and stirred for 2.5 hours. (2) Mix 2-mercaptobenzothiazole and isooctyl acetate, add 2.4 times the weight of the mixture in 75% ethanol solution, and mix evenly; a mixed solution 1 is obtained. (3) Add the mixed solution dropwise to the reaction kettle of step (1) at a rate of 150 drops / min. (4) Heat the reaction kettle to -5°C, add sodium 4-cumene sulfonate, and stir for 2 hours. (5) Continue ...

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Abstract

The invention discloses a concrete crack resistance reinforcing additive and a preparation method thereof. The concrete crack resistance reinforcing additive is prepared from the following raw materials in parts by weight: 16-32 parts of chitosan, 15-22 parts of sodium 4-propan-2-ylbenzenesulfonate, 12-19 parts of 2-mercaptobenzothiazole, 6-17 parts of methyl dihydrojasmonate, 11-17 parts of N,N-Dimethyl-4-nitrosoaniline and 7-15 parts of isooctyl acetate. The concrete crack resistance reinforcing additive has the advantages that an unexpected synergistic effect is achieved through compoundingof the raw materials, the crack resistance and the impermeability are good, the waterproof protection period is long, the bending strength, the tensile strength and the compressive strength are high,and therefore the application range is widened, and the popularization value is high. The preparation method has the advantages that a preparation process is easy to realize, and industrial production is facilitated.

Description

technical field [0001] The invention relates to the field of construction, in particular to a concrete anti-crack reinforcement additive and a preparation method thereof. Background technique [0002] Concrete, referred to as "concrete" for short, usually refers to using cement as the cementitious material, sand and stone as the aggregate, mixed with water in a certain proportion, and mixed. Concrete has the characteristics of rich raw materials, low price and simple production process, which makes it widely used. It is not only used in various civil engineering, but also in shipbuilding, machinery industry, marine development, geothermal engineering, etc. Concrete is also an important material . However, due to the characteristics of its own structure, concrete materials often leak during use, especially for those underground and underwater structural projects, which seriously affects and restricts the application of concrete materials. At the same time, concrete has low ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38
CPCC04B40/0039C04B24/38C04B24/20C04B24/16C04B24/045
Inventor 周冲爱
Owner 广东龙腾建材科技有限公司