Method for preparing rubber powder-supported pavement automobile exhaust degrading composite

Abstract

The invention relates to a method for preparing a rubber powder-supported pavement automobile exhaust degrading composite, which is a method for compounding rubber powder, titanium oxide powder having a photocatalysis function and a coupling agent. Due to a characteristic of huge specific surface area, the rubber powder can be used to absorb and carry the titanium oxide powder to a maximum degreeand fully absorb and collect automobile exhaust over pavements. Therefore, the method has the advantages that: the photocatalysis function of the titanium oxide is effectively protected and fully used and the efficiency of the pavement automobile exhaust degradation of the titanium oxide is improved; meanwhile, due to the high elasticity of the rubber powder and the action of the coupling agent, corresponding products have high wheel rolling resistance and rain washing resistance and the service life of the photocatalysis is prolonged. The composite can be used on surfaces of traffic facilities needing automobile exhaust degradation, such as asphalt concrete and cement concrete pavements, tunnels and culverts.

Description

technical field [0001] The invention relates to a preparation method of a rubber powder-loaded road vehicle tail gas degradation composite material, which belongs to the field of road traffic environment treatment. Background technique [0002] Due to the high-rise buildings on both sides of the urban roads and the low horizontal velocity of the air, a large amount of vehicle exhaust gathers in the space above the urban roads, which is difficult to dilute or degrade, posing a threat to the health of pedestrians and surrounding residents. Although the country has promulgated the relevant vehicle exhaust emission standards, at present, with the rapid increase in the number of vehicles, the large amount of vehicle exhaust pollution is further deteriorating the urban air quality. [0003] The accumulation of automobile exhaust in the urban road environment, on the one hand, seriously endangers the health of citizens, and on the other hand, it also provides the best opportunity f...

AI Technical Summary

Problems solved by technology

Among them, the "spraying method" is characterized in that the titanium dioxide and the binder are fully mixed and then sprayed on the road surface, and the titanium dioxide is still in a coated state, which is not conducive to photocatalytic degradation; while the "spraying method" although the binder is first applied to the road surface , and then spread the titanium dioxide powder on the surface of the binder, resulting in a significant improvement in the degradation effect, but the "spreading method" not only has less mass of titanium dioxide dispersed in the "unit area" of the road surface, but also, because the powder and the binder belong to the surface bonding, it is firmly Low density, easy to waste

[0007] 2. Although the automobile exhaust above the urban road is gathered near the surface of the road, most of the exhaust cannot be gathered near the titanium dioxide powder and cannot fully contact and react with the catalyst, resulting in low catalytic degradation efficiency of the road catalyst