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A kind of expansion fiber anti-crack waterproof agent

A technology of anti-crack waterproofing agent and expanded fiber, which is applied in the field of building materials, can solve the problems of low flexural strength, low anti-seepage level and anti-freezing level, poor anti-cracking durability, etc., and achieves improved flexural strength and good waterproof performance Impermeability function, the effect of improving crack resistance and impermeability

Active Publication Date: 2021-06-11
WEIFANG ASPECT BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The waterproof and anti-cracking agent provided in this invention uses wood fibers to improve the crack resistance and waterproof performance of concrete, but adding wood fibers to concrete will lead to low anti-seepage and frost resistance levels, poor crack resistance durability, and affect its anti-cracking performance. Bending strength

Method used

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  • A kind of expansion fiber anti-crack waterproof agent
  • A kind of expansion fiber anti-crack waterproof agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The expansion fiber anti-crack waterproof agent of this embodiment is composed of the following raw materials in mass percentage: 30% of anti-crack expansion agent, 20% of micropearl powder, 45% of coal gangue, 0.5% of modified basalt fiber, carboxymethyl cellulose Chitosan 2%, sodium sulfate 1.3%, water reducer 1.0%, defoamer 0.2%.

[0041] The preparation method of the modified basalt fiber is as follows:

[0042] (S1) first cleaning the basalt fiber with dilute hydrochloric acid with an HCl content of 10%;

[0043] (S2) Prepare a mixed solution of concentrated sulfuric acid and nitric acid with a mass ratio of 50:1, and place it in an ice bath to cool. When the mixed solution is lower than 5°C, add the cleaned basalt fiber, stir evenly, and react for 10 minutes;

[0044] (S3) adding HNO to the basalt fiber prepared in (S2) 3 For a mixed solution of nitric acid and hydrofluoric acid with a content of 30wt% and a HF content of 20%, the temperature is raised to 50°C, ...

Embodiment 2

[0049] The expansion fiber anti-crack waterproof agent of this embodiment is composed of the following raw materials in mass percentage: 10% of anti-crack expansion agent, 40% of micropearl powder, 42% of coal gangue, 5% of modified basalt fiber, carboxymethyl cellulose Chitosan 0.4%, Potassium Aluminum Sulfate 2%, Water Reducer 0.5%, Defoamer 0.1%.

[0050] The preparation method of the modified basalt fiber is as follows:

[0051] (S1) first cleaning the basalt fiber with dilute hydrochloric acid with an HCl content of 10%;

[0052] (S2) Prepare a mixed solution of concentrated sulfuric acid and nitric acid with a mass ratio of 40:1, and place it in an ice bath to cool. When the mixed solution is lower than 5°C, add the cleaned basalt fiber, stir evenly, and react for 10 minutes;

[0053] (S3) adding HNO to the basalt fiber prepared in (S2) 3 For a mixed solution of nitric acid and hydrofluoric acid with a content of 30wt% and a HF content of 20%, the temperature is raised...

Embodiment 3

[0058] The expansion fiber anti-crack waterproof agent of this embodiment is composed of the following raw materials in mass percentage: 20% of anti-crack expansion agent, 30% of micropearl powder, 42.9% of coal gangue, 3% of modified basalt fiber, carboxymethyl cellulose Chitosan 1.5%, calcium formate 1.6%, calcium nitrate 0.4%, water reducer 0.5%, defoamer 0.1%.

[0059] The preparation method of the modified basalt fiber is as follows:

[0060] (S1) first cleaning the basalt fiber with dilute hydrochloric acid with an HCl content of 10%;

[0061] (S2) Prepare a mixed solution of concentrated sulfuric acid and nitric acid with a mass ratio of 45:1, and place it in an ice bath to cool. When the mixed solution is lower than 5°C, add the cleaned basalt fiber, stir evenly, and react for 10 minutes;

[0062] (S3) adding HNO to the basalt fiber prepared in (S2) 3 For a mixed solution of nitric acid and hydrofluoric acid with a content of 30wt% and a HF content of 20%, the temper...

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Abstract

The invention discloses an anti-crack waterproofing agent for expansion fiber, which is composed of the following raw materials in mass percentage: 10%-30% of anti-crack expansion agent, 20%-40% of microbead powder, 30%-45% of coal gangue, modified Basalt fiber 0.5%~5%, cellulose graft chitosan 0.4%~2%, early strength agent 1%~2%, water reducing agent 0.5%~1.0%, defoamer 0.1%~0.2%, the above raw materials The sum of the mass percentages is 100%. The expansion fiber anti-crack waterproof agent provided by the present invention has double anti-crack and waterproof functions, and the anti-crack expansion agent in the composite material and modified basalt fiber and cellulose grafted chitosan can improve the anti-crack waterproof agent in concrete. Dispersion, which plays a role in superimposing and compensating shrinkage in concrete, effectively avoids microcracks caused by different reasons of different ages of concrete, prevents and inhibits the generation and development of cracks, and can improve the flexural strength, impermeability and anti-permeability of concrete. frozen.

Description

technical field [0001] The invention relates to the field of building materials, in particular, the invention provides an anti-crack and waterproof agent for expanded fibers. Background technique [0002] With the increasing number of construction projects, the problem of concrete shrinkage and cracking has become increasingly prominent, which has seriously affected the durability, bearing capacity and waterproof performance of concrete. There are three main reasons for cracks in concrete structures: one is caused by external loads, and the existence of such cracks is the most common, mainly due to problems such as unreasonable structural design, insufficient safety factor, lack of consideration of the possibility of construction, and insufficient structural rigidity; This kind of crack is caused by the secondary stress of the structure. Due to the discrepancy between the actual working state of the concrete structure and the conventional calculation or the lack of comprehen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/42C04B20/02C04B14/46C04B103/65C04B103/60
CPCC04B20/023C04B40/0039C04B2103/60C04B2103/601C04B2103/65C04B18/082C04B18/12C04B14/4656C04B24/383C04B24/38C04B22/147C04B2103/302C04B24/42C04B22/064C04B22/148C04B22/085C04B24/04
Inventor 邓小龙饶蔚兰覃彩云陈威黎威胡可峰
Owner WEIFANG ASPECT BUILDING MATERIALS
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