Preventive pavement maintenance method for degrading vehicle exhaust

Abstract

The invention discloses a preventive pavement maintenance method for degrading vehicle exhaust. The preventive pavement maintenance method comprises the following steps: adding asphalt, fibers, a modifier and a titanium dioxide aqueous solution to a fiber-feeding synchronous macadam seal coating vehicle, and paving the materials on the pavement; rolling the fiber asphalt macadam seal coat: after paving, using a pneumatic-tired road roller to roll the pavement, and embedding the aggregate into the asphalt under the action of the road roller, wherein the aggregate coated with the asphalt is up to 1 / 2-2 / 3 of the aggregate height; the asphalt surface between the aggregates is coated with a titanium dioxide thin film exposed to air; at last, finishing the fiber asphalt macadam seal coating. The preventive pavement maintenance method disclosed by the invention is used for spraying the titanium dioxide aqueous solution between the asphalt layer and the aggregate layer to form a layer of titanium dioxide thin film which cannot reduce the skid resistance of the pavement. As titanium dioxide is sprayed between the asphalt layer and the aggregate layer, the exhaust from various vehicles can be degraded well; the economic benefit is high; the preventive pavement maintenance method overcomes the problem that in the prior art, the method of adding the nanometer titanium dioxide to the mixture to be directly mixed and then used for paving the pavement is low in exhaust degrading efficiency.

Description

technical field [0001] The invention belongs to the technical field of asphalt pavement, and in particular relates to a road surface preventive maintenance method for degrading automobile exhaust. Background technique [0002] With the rapid development of science and technology, the number of automobiles is constantly increasing. While automobiles bring great convenience to people's transportation, the exhaust pollutants they produce seriously damage the natural environment on which human beings live. How to improve the environment on which humans live has become an urgent problem to be solved. Photocatalytic degradation of pollutants has gradually become a new topic in the treatment of industrial pollution due to its novelty, low energy consumption, and environmental friendliness. Nano-titanium dioxide is a new type of photocatalyst. Nano titanium dioxide has the characteristics of high activity, good stability, harmless to human body, long duration of action, many times ...

AI Technical Summary

Problems solved by technology

Surface coating for NOx, CO and SO 2 The rate of absorption and decomposition of toxic gases such as that of the direct mixing type is higher than that of the direct mixing type, but studies have shown that coating the surface with titanium dioxide film will reduce the anti-skid performance of the asphalt pavement and endanger driving safety.

Although the direct mixing method is easy to operate, some nano-titanium dioxide is dispersed inside the road surface and cannot be in contact with automobile exhaust, so it cannot fully exert its role in decomposing toxic gases

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