Self-cleaned cement based composite material with high toughness and preparation method of self-cleaned cement based composite material

A composite material and self-cleaning technology, applied in the field of building materials, can solve the problems of easy accumulation of dirt on the surface of materials, no self-cleaning function, environmental pollution, etc., achieve good self-cleaning function, significant social and economic benefits, and improve oxidation degradation efficiency Effect

Inactive Publication Date: 2014-11-05
杭州赛奇丝科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two materials have good tensile and crack resistance properties, but do not have self-cleaning function. The surface of the material is easy to accumulate dirt and is difficult to clean, causing environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The self-cleaning high-toughness cement-based composite material of the present invention has a matrix material component and a mass ratio of:

[0019] Cement: water: fine aggregate: fly ash: silica fume: granulated blast furnace slag: metakaolin: water reducer = 1:0.581:0.799:1.200:0.120:0.050:0.120:0.012.

[0020] The content of the self-cleaning component nano-titanium dioxide is 4.76% of the total mass of the substrate.

[0021] The proportion uses PVA short fibers, the fiber length is 8.0mm, and the fiber accounts for 1.19% of the volume of the matrix.

[0022] The preparation method of the self-cleaning high-toughness cement-based composite material provided by the present invention is as follows:

[0023] The specific steps are: add cement, fine aggregate, fly ash, silica fume, granulated blast furnace slag, metakaolin and nano-titanium dioxide into the mixer according to the above ratio, stir for 3 minutes to disperse evenly, and make dry powder; After mixing ...

Embodiment 2

[0026] The self-cleaning high-toughness cement-based composite material of the present invention has a matrix material component and a mass ratio of:

[0027] Cement: water: fine aggregate: fly ash: silica fume: granulated blast furnace slag: metakaolin: water reducer = 1: 0.566: 0.799: 1.147: 0.110: 0.060: 0.130: 0.013.

[0028] The content of the self-cleaning component nano-titanium dioxide is 7.41% of the total mass of the substrate.

[0029] This proportion uses PVA short fiber, the fiber length is 12.0mm, and the fiber accounts for 1.8% of the volume of the matrix.

[0030] The preparation method of the self-cleaning high-toughness cement-based composite material provided by the present invention is as follows:

[0031] The specific steps are: add cement, fine aggregate, fly ash, silica fume, granulated blast furnace slag, metakaolin and nano-titanium dioxide into the mixer according to the above ratio, stir for 4 minutes to disperse evenly, and make dry powder; After ...

Embodiment 3

[0034] The self-cleaning high-toughness cement-based composite material of the present invention has a matrix material component and a mass ratio of:

[0035] Cement: water: fine aggregate: fly ash: silica fume: granulated blast furnace slag: metakaolin: water reducer = 1: 0.665: 0.736: 1.147: 0.110: 0.088: 0.179: 0.011.

[0036] The content of the self-cleaning component nano-titanium dioxide is 9.8% of the total mass of the substrate.

[0037] This proportion uses PVA short fiber, the fiber length is 18.0mm, and the fiber accounts for 2.4% of the volume of the matrix.

[0038] The preparation method of the self-cleaning high-toughness cement-based composite material provided by the present invention is as follows:

[0039] The specific steps are: add cement, fine aggregate, fly ash, silica fume, granulated blast furnace slag, metakaolin and nano-titanium dioxide into the mixer according to the above ratio, stir for 5 minutes to disperse evenly, and make dry powder; After m...

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Abstract

The invention provides a self-cleaned cement based composite material with high toughness. The preparation method comprises the following steps: adding cement, fine aggregates, coal ash, silicon ash, pelletized blast furnace slags, metakaolin and nano titanium dioxide into a stirrer, and stirring to prepare dry powder; then, adding water and a water reducing agent to prepare slurry; finally, adding a certain amount of short fibers to finally obtain the self-cleaned cement based composite material with high toughness. The self-cleaned cement based composite material not only has good anti-tension and anti-crack characteristics, but also has the self-cleaning function. The self-cleaned cement based composite material can be widely applied to the fields of house building, road and bridge projects, national defense construction and the like and is remarkable in social and economical benefits.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a self-cleaning high-toughness cement-based composite material and a preparation method thereof. technical background [0002] With the development of society, people require building materials not only to have good tensile and crack resistance properties, but also to have functions such as self-cleaning and environmental protection. It is generally believed that the use of fiber reinforced technology is an effective and feasible method to improve the tensile and crack resistance properties of cement-based composites. The team of Professor Victor Li from the University of Michigan used polyvinyl alcohol fiber reinforced technology to obtain high-toughness cementitious composites for the first time [Li VC.On engineered cementitious composites (ECC)[J], J.Adv.Concr.Technol .2003, 1(3):201-230]. Domestically, the team of Professor Xu Shihong also developed a high-toug...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B22/06
CPCY02A30/30
Inventor 范立峰王激扬丁德坤
Owner 杭州赛奇丝科技有限公司
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