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Self-cleaning high-crack-resistance self-leveling veneer mortar and preparation method

A decorative mortar and high crack resistance technology, which is applied in the field of building materials, can solve the problems of external wall pre-casting restrictions, lower fluidity of pouring mortar, and uneven dispersion, so as to keep the surface clean, good crack resistance, and mechanical strength. good performance

Inactive Publication Date: 2019-08-27
ANHUI UNIVERSITY OF ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the uneven dispersion of ordinary glass fibers in cement-based materials, a relatively large amount is usually required to obtain more obvious crack resistance. At the same time, low dispersion results in exposed fibers on the outer surface, which requires post-processing; In addition, due to the development of modern prefabricated buildings, a large amount of fiber will cause a significant decrease in the fluidity of the pouring mortar, which will bring greater restrictions in the pre-casting process of the exterior wall.
[0003] The research on the self-cleaning and environmental protection characteristics of cement-based materials has been relatively mature, but at present it is mainly based on the addition of anatase titanium dioxide. For example, the domestic Fan Lifeng team developed a self-cleaning high-toughness cement-based composite material and Its preparation method [CN104129951A[P].], but the uniform dispersion of nano-titanium dioxide in cement-based materials is not high, and the self-cleaning efficiency of nano-titanium dioxide is not high

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0026] A kind of self-cleaning high anti-crack self-leveling mortar, its composition and proportion (weight percentage) are: 30% white portland cement, 0.4% glass fiber, 43% white sand, 6% metakaolin, 1% water reducing agent, 1.3% expansion agent, 2% dispersed latex powder, 6% alkali-activated fly ash, 0.3% nano titanium dioxide, 10% water. The obtained self-cleaning high anti-crack self-leveling mortar was tested for performance, and the results are shown in Table 1.

[0027]

Embodiment 2

[0029] A kind of self-cleaning high anti-cracking self-leveling decorative mortar, its composition and proportion (percentage by weight) are: 32% white portland cement, 0.5% glass fiber, 40% white sand, 8% metakaolin, 0.8% water reducing agent, 1.4% expansion agent, 2.5% dispersed latex powder, 5% alkali-activated fly ash, 0.3% nano titanium dioxide, 9.5% water. The obtained self-cleaning high anti-cracking self-leveling mortar was subjected to a performance test, and the results are shown in Table 2.

[0030]

[0031] From the above Examples 1 and 2, it can be found that a self-cleaning, high-crack-resistant, self-leveling decorative mortar proposed by the present invention can be configured with corresponding products according to engineering requirements, and all properties meet or exceed the standard requirements, and High fluidity can be directly applied to the rapid pouring of large-scale exterior walls of prefabricated buildings, especially for projects with self-cle...

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Abstract

The invention discloses a self-cleaning high-crack-resistance self-leveling veneer mortar. The mortar is prepared from, by weight, 25-35% of white cement, 0.5-1.0% of a water reducing agent, 1-2% of an expanding agent, 0.2-0.5% of nano titanium dioxide, 2-6% of alkali activation pulverized fuel ash and 10-13% of water. The sum of the weight percentage of all the raw materials is 100%. The invention further discloses a preparation method of the self-cleaning high-crack-resistance self-leveling veneer mortar. The method comprises the following steps that after the titanium dioxide and the alkaliactivation pulverized fuel ash are mixed and stirred, the mixture, white Portland cement, metakaolin, redispersible emulsion powder and the expanding agent are added into a stirrer according to a proportion, white sand is added for stirring for one minute, and finally fibers are added for stirring for 3-5 minutes. The self-cleaning high-crack-resistance self-leveling veneer mortar has better crack resistance, fluidity and self-cleaning performance and can be widely applied to large-size outer wall face layers of assembly-type buildings, and the social and economic benefits are obvious.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a self-cleaning, high-crack-resistant, self-leveling decorative mortar and a preparation method thereof. Background technique [0002] With the rapid development of the economic level, as an emerging exterior wall facing material for building walls, fiber reinforced cement-based materials (GRC) should receive widespread attention for their high crack resistance. However, due to the uneven dispersion of ordinary glass fibers in cement-based materials, a relatively large amount is usually required to obtain more obvious crack resistance. At the same time, low dispersion results in exposed fibers on the outer surface, which requires post-processing; In addition, due to the development of modern prefabricated buildings, a large amount of fiber will cause a significant decrease in the fluidity of the pouring mortar, resulting in greater restrictions in the pre-casting proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/34
CPCC04B28/04C04B2111/00008C04B2111/343C04B2201/50C04B14/44C04B14/06C04B14/106C04B2103/302C04B2103/0068C04B2103/0057C04B18/08C04B14/305
Inventor 刘开伟叶哲孙道胜王爱国王月明陈东
Owner ANHUI UNIVERSITY OF ARCHITECTURE
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