Concrete material having function of purifying gas-solid pollutants and preparation method thereof

A concrete and pollutant technology, applied in chemical instruments and methods, separation methods, other chemical processes, etc., can solve the problems of unfavorable popularization and application, high cost, short photocatalytic life of road surface, etc., and achieve improved photocatalytic efficiency and low cost , the effect of enhancing the photocatalytic performance

Active Publication Date: 2013-01-02
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to alleviate air pollution, people began to apply photocatalytic materials on roads extending in all directions, which played a certain role in local air purification. Mixed use, etc., the photocatalytic life of the pavement built by these methods is relatively short, and the cost of the latter is too high, which is not conducive to popularization and application

Method used

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  • Concrete material having function of purifying gas-solid pollutants and preparation method thereof
  • Concrete material having function of purifying gas-solid pollutants and preparation method thereof
  • Concrete material having function of purifying gas-solid pollutants and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Select river sand with a fineness modulus of 2.6 and dry it for later use; select 400-grade shale ceramsite loaded with photocatalytic materials (that is, the following aggregates with photocatalytic properties, or coarse aggregate-loaded photocatalytic materials, or photocatalytic aggregates, or coarse aggregates loaded with photocatalysts), placed in water for 24 hours to make it saturated with water, and then placed in a freezing environment to freeze, so that the pores on the surface and the adsorbed water on the surface freeze to obtain Pretreated photocatalytic aggregates, ready for use; using water as the medium, ultrasonically disperse Degussa P25 (photocatalyst TiO 2 5g / m 2 ), this mixture is named A, and it is reserved; the raw materials are weighed according to the following content: 32.5 ordinary Portland cement 260 kg / m 3 , silica fume 29kg / m 3 , sand rate 45% (coarse aggregate ceramsite in sand rate 255kg / m 3 ), effective water 155kg / m 3 , water reduce...

Embodiment 2

[0056] Select machine-made sand with a fineness modulus of 2.9 and dry it for later use; select 600-grade clay ceramsite loaded with photocatalytic materials, place it in water for 24 hours to make it saturated, and then freeze it in a freezing environment to make its surface porosity and the adsorbed water on the surface is frozen, and the photocatalytic aggregate is pretreated for use; using water as the medium, ultrasonically disperse Hombikat UV100 (ie TiO 2 14g / m 2 ), this mixture is named B, and it is reserved; the raw materials are weighed according to the following content: 32.5 ordinary Portland cement 280.5 kg / m 3 , fly ash 49.5 kg / m 3 , sand rate 30%, water 180kg / m 3 , superplasticizer 2.64kg / m 3 (Naphthalene-based water reducer, powder, water reducing rate 25%), spare; the above raw materials (ie, ordinary Portland cement, fly ash, pretreated photocatalytic aggregate, machine-made sand, water, water reducer) mixed Fill it into the test mold after stirring, and ...

Embodiment 3

[0060] Select ceramic sand with a fineness modulus of 3.4, place it in water for 24 hours to make it saturated, and set aside; select 800-grade fly ash ceramsite loaded with photocatalytic materials, place it in water for 24 hours to make it saturated, and then place Freeze in a freezing environment to freeze the pores on the surface and the adsorbed water on the surface to obtain pretreated photocatalytic aggregates for use; use water as the medium to ultrasonically disperse Anatase, and name this mixture C for use; weigh it according to the following content Raw materials: 32.5 ordinary Portland cement 330 kg / m 3 , silica fume 11 kg / m 3 , fly ash 99 kg / m 3 , sand rate 35%, effective water 200 kg / m 3 , water reducer 4.4 kg / m 3 (Melamine-based water-reducing agent, powder, water-reducing rate 25%), spare; the above-mentioned raw materials (ie, ordinary Portland cement, silica fume, fly ash, pretreated photocatalytic aggregates, ceramic sand, effective water, Water reducer)...

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Abstract

The invention belongs to the technical field of functional concrete, and relates to a concrete material having a function of purifying gas-solid pollutants. The concrete material is characterized by being prepared from the components of cement, fine aggregate, coarse aggregate, water, water reducing agent, photocatalyst, an alkali solution and retarder, wherein the cement is 260-530 kg/m<3>, the silica fume content is 0-10 wt% of the cement content, the fly ash content is 0-25 wt% of the cement content, and the slag content is 0-40 wt% of the cement content; the coarse aggregate is 255-850 kg/m<3>, and the sand ratio is 30-45%; the water is 155-220 kg/m<3>; the mixing amount of the water reducing agent accounts for 0.5-1.2% of the total weight of the cement; the photocatalyst is 5-25 g/m<2>; the retarder content accounts for 0.01-1.0% of the weight of the cement to be removed on the surface layer of the concrete; the photocatalyst is put into the alkali solution to prepare a mixture; and the concentration of the photocatalyst is 1-5 g/L. The concrete material prepared by the method has a function of purifying gas-solid pollutants.

Description

[0001] technical field [0002] The invention belongs to the technical field of functional concrete, and in particular relates to a concrete material with the function of purifying gas-solid pollutants and a preparation method thereof. Background technique [0003] In recent years, my country's economic development has advanced by leaps and bounds, but the accompanying environmental pollution problems have also become increasingly serious. As an important part of environmental pollution, air pollution has caused extremely serious impacts on people's life and health. Air pollutants are mainly NO x , SO x , CO, hydrocarbons, and suspended solid particles, among which NO from vehicle exhaust x , PM exceeds 85% of the total amount of such pollution in the atmosphere, and CO and hydrocarbons exceed 70% of the total amount of such pollution in the atmosphere. [0004] In order to alleviate air pollution, people began to apply photocatalytic materials on roads extending in all ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/30B01J20/22B01J20/26B01J20/30B01D53/86B01D53/04
Inventor 王发洲董跃杨露张运华付军
Owner WUHAN UNIV OF TECH
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