Preparation method of blended cement concrete capable of degrading NOx

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...

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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 2 The agglomeration phenomenon of the material itself greatly weakens its catalytic effect; (2) How to introduce pavement materials to make it exert a sustained and efficient catalytic degradation effect

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