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A method for surface anti-seepage enhancement treatment of fair-faced concrete components

A technology of fair-faced concrete and enhancement treatment, applied in the field of construction engineering, can solve the problems of reducing the anti-penetration ability and strength of fair-faced concrete components, affecting the service life, etc., and achieves the effects of not easily delaminated and falling off, improving the service life, and improving the anti-penetration ability.

Active Publication Date: 2021-03-23
湖北正茂新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the existing technology, a certain amount of gas will be introduced during the concrete mixing process, and the added water will evaporate to generate water vapor, so there are many tiny pores dispersed inside and on the surface of the fair-faced concrete components, and the existence of tiny pores will reduce the penetration resistance of the fair-faced concrete components capacity and strength, thereby affecting service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In the present embodiment, the specific steps of the surface anti-seepage enhancement treatment method of fair-faced concrete members are as follows:

[0031] The first step is to prepare inorganic silica sol, specifically:

[0032] (1) Using water glass solution as raw material, dilute the water glass solution and perform ion exchange to obtain high-purity silicic acid solution, that is, silica sol.

[0033] In the present embodiment, the water glass solution adopts the industrial grade water glass solution with a mass concentration of 27.6%. In fact, the water glass solution with a mass concentration of 20% to 40% sold on the market can be used as a raw material; The water glass solution is diluted to a dilute solution with a mass concentration of 2% to 6%.

[0034] In this embodiment, the specific implementation process of ion exchange is: make the dilute solution pass through the strongly acidic H-type cation exchange resin at a preset flow rate, and the Na in the ...

Embodiment 2

[0047] This embodiment is a comparative test. The strength and impermeability tests of three groups of fair-faced concrete members without silica sol spraying were carried out. The strengths at 28 days were 47.3 MPa, 49.1 MPa, and 53.1 MPa respectively. According to the impermeability design requirement P8, the maximum impervious pressure was 0.8 MPa. Three groups of fair-faced concrete members sprayed with silica sol were tested for strength, and the strengths at 28 days were 53.4MPa, 52.6MPa, and 56.0MPa, respectively, and the maximum impermeable pressure could reach 1.0MPa. After spraying silica sol, the anti-penetration ability of fair-faced concrete components increased by 25%, and the strength of 28 days can be increased by up to 13%.

[0048] The present invention utilizes the characteristics of tiny silica sol particles and strong penetrating power to coat the special silica sol on the surface of fair-faced concrete components, and the silica sol particles penetrate in...

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Abstract

The invention discloses a surface seepage preventing strengthening treatment method for fair-faced concrete members. The method comprises the following steps: step 1, preparing inorganic silica sol: 1.1, diluting a water glass solution, and performing ion exchange to obtain a silicic acid solution; 1.2, adding a pH regulator to the silicic acid solution to adjust pH of the silicic acid solution to9.0-11.0, crystallizing the silicic acid solution, and performing concentration and purification sequentially to obtain mother liquor; 1.3, mixing the mother liquor with water in a mass ratio of 1:(0.5-4), adding a dispersant, a surfactant and an anti-cracking agent, and performing mixing to obtain the inorganic silica sol; step 2, coating surfaces of the fair-faced concrete members with the inorganic silica sol prepared in the step 1 to perform seepage preventing strengthening treatment on the fair-faced concrete members. Seepage preventing capacity and strength of the fair-faced concrete members can be improved obviously and stably, the service life of the members is prolonged, and the method is simple and practical and suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, and in particular relates to a surface anti-seepage enhancement treatment method of fair-faced concrete components. Background technique [0002] Fair-faced concrete, also known as decorative concrete, is formed by one-time cast-in-place technology, and no external decoration is required after the formwork is removed, and the natural surface of the concrete is directly used as the finish. Under the existing technology, a certain amount of gas will be introduced during the concrete mixing process, and the added water will evaporate to generate water vapor, so there are many tiny pores dispersed inside and on the surface of the fair-faced concrete components, and the existence of tiny pores will reduce the penetration resistance of the fair-faced concrete components capacity and strength, thereby affecting service life. Contents of the invention [0003] The purpose of this inve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/68
CPCC04B41/5016C04B41/68C04B41/5015C04B41/4869C04B41/46C04B41/483
Inventor 管正兵罗欣柳鹏
Owner 湖北正茂新材料科技股份有限公司