Photocatalytic modified aggregate for self-cleaning concrete and preparation method thereof

A self-cleaning, concrete technology, applied in the direction of chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of not being able to continuously and effectively exert the photocatalytic self-cleaning function, and not having self-cleaning functional properties , to achieve the effect of improving self-cleaning performance and increasing contribution

Inactive Publication Date: 2020-02-28
黄贺明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, in the preparation of self-cleaning concrete, photocatalysts are generally mixed with cement or sprayed on the surface of the concrete. During the conversion process, the photocatalyst is further hydrated to form a package on the photocatalyst, as well as the friction loss of the surface coating, concrete carbonization, and acid corrosion. Due to the loss of concrete slurry mixed with photocatalyst on the surface due to other reasons, the aggregate without photocatalytic effect is exposed, and the photocatalytic self-cleaning function cannot be continuously and effectively exerted.
[0004] The proportion of aggre

Method used

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  • Photocatalytic modified aggregate for self-cleaning concrete and preparation method thereof
  • Photocatalytic modified aggregate for self-cleaning concrete and preparation method thereof

Examples

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Effect test

Embodiment 1

[0025] A photocatalytically modified aggregate for self-cleaning concrete, which is soaked in the cleaned and treated aggregate whose surface pH value is not lower than 10 The self-cleaning photocatalytic suspension slurry formed by water-retarding agent, retarding water reducer, water and thickener; the average thickness of the prepared photocatalytic modified aggregate surface slurry wrapping is not less than 100um and not more than 800um, and the wrapping area is not less than 100um. less than 95%.

[0026] Wherein, the particle diameter of the aggregate is not less than 2.35 mm, and may be non-porous aggregates such as river sand, machine-made sand, quartz sand, and stones. The mass ratio of cement, microsilica powder, nano titanium dioxide, microbead powder, quartz stone powder, dispersant, retarding water reducer, water, and thickener in the self-cleaning photocatalytic suspension slurry is 1:0.05 :0.05:0.10:0.05:0.0003:0.005:0.25:0.0001. The silicon dioxide content of...

Embodiment 2

[0044] This embodiment is the same as that of Embodiment 1 except for the composition in parts by weight of the self-cleaning photocatalytic suspension slurry. The mass ratio of cement, microsilica powder, nano titanium dioxide, microbead powder, quartz stone powder, dispersant, retarding water reducer, water, and thickener in the self-cleaning photocatalytic suspension slurry is 1:0.15 :0.10:0.20:0.15:0.006:0.02:0.4:0.0003.

Embodiment 3

[0046] This embodiment is the same as that of Embodiment 1 except for the composition in parts by weight of the self-cleaning photocatalytic suspension slurry. The mass ratio of cement, microsilica powder, nano titanium dioxide, microbead powder, quartz stone powder, dispersant, retarding water reducing agent, water and thickener in the self-cleaning photocatalytic suspension slurry is 1:1 :0.075:0.15:0.10:0.0045:0.0125:0.325:0.0002.

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Abstract

The invention relates to the technical field of aggregate for building concrete, and discloses a photocatalytic modified aggregate for self-cleaning concrete and a preparation method thereof. The photocatalytic modified aggregate is prepared by soaking washed aggregate in self-cleaning photocatalytic suspension slurry, which is prepared from silica fume, nano titanium dioxide, cement, bead powder,quartz stone powder, a dispersant, a retarding type water reducer, water, and a thickening agent. The photocatalytic suspension slurry modifies the natural mineral aggregate in concrete; the developed modified concrete aggregate has a photocatalytic function, the contribution of the aggregate to the photocatalytic function of the concrete is largely improved in the later stage, and the self cleaning function is continuously and effectively improved.

Description

technical field [0001] The invention relates to the technical field of aggregates for building concrete, in particular to a photocatalytically modified aggregate for self-cleaning concrete and a preparation method thereof. Background technique [0002] With the rapid development of society, the rapid development of industry and automobiles has caused the global nitrogen oxide and sulfide emissions to increase year by year, and the global environmental air pollution has become more and more serious, seriously affecting the normal life and health of human beings. How to effectively purify and solve air pollutants has become a research hotspot at home and abroad. Among them, photocatalytic technology can use solar energy to directly oxidize and reduce pollutants such as nitrogen oxides in the air into non-toxic substances. This technology has the characteristics of low preparation cost and low pollution. It is currently recognized as one of the best means of self-cleaning. [...

Claims

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Application Information

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IPC IPC(8): C04B20/02C04B20/10B01J21/08
CPCB01J21/08B01J35/004C04B20/02C04B20/023C04B20/1077C04B20/1066C04B20/1018C04B20/1033C04B20/1048
Inventor 刘福财肖敏汪鹏飞黎浩黄贺明
Owner 黄贺明
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