Preparation method of blended cement concrete capable of degrading NOx

A cement concrete and concrete technology, applied in the field of photocatalysis, can solve the problems of weakening the catalytic effect, and achieve the effects of improving the tensile strength and bonding strength, enhancing the bonding effect, and strengthening the bonding.

Active Publication Date: 2014-11-19
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Scholars at home and abroad for nano-TiO 2 In the process of research and development of photocatalytic materials, the problems that need to be broken through mainly come from two aspects: (1) nano-TiO

Method used

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  • Preparation method of blended cement concrete capable of degrading NOx
  • Preparation method of blended cement concrete capable of degrading NOx

Examples

Experimental program
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Effect test

Embodiment 1

[0033] (1) TiO 2 Fully mix with activated carbon at a mass ratio of 1:1 to make nano-TiO 2 The material is not easy to agglomerate and easy to disperse.

[0034] (2) Cement, TiO 2 Mix the mixture prepared in proportion with activated carbon, ethylene-vinyl acetate polymer and dispersant polycarboxylate in a weight ratio of 1:0.03:0.05:0.01, mix the mixture well, and then mix it with appropriate amount of water and sand Synthetic polymer cement mortar.

[0035] (3) When the cement concrete specimen is made into shape, spread the freshly mixed polymer cement mortar on the surface of the cement concrete to form an ultra-thin surface layer of cement-based photocatalytic mortar with a certain thickness, and then form such a combination cement concrete surface. Cover the surface with a plastic film after molding, and let it stand for one to two days and nights at a room temperature of 20°C ± 5°C and a relative humidity greater than 50%, and then remove the mold. Put the intact ...

Embodiment 2

[0038] (1) TiO 2 Fully mix with activated carbon at a mass ratio of 1:1 to make nano-TiO 2 The material is not easy to agglomerate and easy to disperse.

[0039] (2) Cement, TiO 2 Mix the mixture prepared in proportion with activated carbon, ethylene-vinyl acetate polymer and dispersant polycarboxylate in a weight ratio of 1:0.05:0.05:0.01, mix the mixture well, and then mix it with appropriate amount of water and sand Synthetic polymer cement mortar.

[0040] (3) When the cement concrete specimen is made into shape, the freshly mixed polymer cement mortar is spread on the surface of the concrete to form an ultra-thin surface layer of cement-based photocatalytic mortar with a certain thickness, thereby forming such a combination Cement concrete surface. Cover the surface with a plastic film after molding, and let it stand for one to two days and nights at a room temperature of 20°C ± 5°C and a relative humidity greater than 50%, and then remove the mold. Put the intact te...

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Abstract

The invention discloses a preparation method of blended cement concrete capable of degrading NOx. The preparation method comprises the following steps: (1) preparing lower-layer cement concrete; (2) preparing TiO2-blended polymer cement mortar, namely fully mixing titanium dioxide powder with active carbon to obtain a mixture of titanium dioxide powder and active carbon, uniformly mixing cement, the mixture of titanium dioxide powder and active carbon, an ethylene-vinyl acetate polymer and a dispersant, adding water and sand, and mixing to obtain the polymer cement mortar; (3) forming the blended cement concrete capable of degrading NOx. According to the preparation method, the newly stirred polymer cement mortar is spread on the surface layer of the lower-layer cement concrete prepared in the step (1) to form a cement-based photocatalytic mortar ultrathin surface layer, then a combined cement concrete surface layer is formed, and the curing operation is carried out to obtain the cement concrete; a test result shows that the decomposition rate of the blended cement concrete to NOx is more than 40%.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a degradable NO X A method for preparing blended cement concrete. Background technique [0002] With the continuous increase of the number of automobiles, the pollution problem caused by automobile exhaust emissions is becoming more and more serious, and the toxic gas mainly NOx in the pollutants has brought a huge threat to people's health. Therefore, the development of efficient and sustainable NOx degradation Environmentally friendly pavement materials are a key technology for effectively controlling exhaust pollution. [0003] Nano-TiO 2 As a semiconductor photocatalyst, the material shows good prospects in environmental pollution control. Scholars at home and abroad for nano-TiO 2 In the process of research and development of photocatalytic materials, the problems that need to be broken through mainly come from two aspects: (1) nano-TiO 2 The agglomeration phenom...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B22/02C04B22/06C04B24/26
Inventor 秦志斌钱国平赵文秀胡灿坤于颖吴小恋李尧张温庭
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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