Modified asphalt concrete for purifying air

Abstract

The invention discloses modified asphalt concrete for purifying air, which comprises traditional asphalt concrete and tourmaline, wherein the use quantity of the tourmaline is 10-40% of the mass of asphalt in the traditional asphalt concrete, and the tourmaline is tourmaline powder and / or tourmaline anion powder. The modified asphalt concrete has remarkable air purifying effect and can effectively purify NOX (Nitrogen Oxide and Nitrogen Dioxide), HC (Hydrocarbon Compounds), CO (Carbon Monoxide) and other harmful gases exhausted by automobiles. Meanwhile, the modified asphalt concrete has certain effect of absorbing greenhouse gas CO2 (Carbon Dioxide) and can obviously improve road surrounding environment. The modified asphalt concrete has the advantages of excellent pavement performance, simple construction technology and nontoxic and harmless raw materials and has great social benefits in the aspects of improving the application quality of asphalt pavement and protecting the environment.

Description

technical field [0001] The invention belongs to the technical field of road materials, and in particular relates to a modified asphalt concrete for air purification. Background technique [0002] With the rapid increase of the number of automobiles, the environmental pollution caused by automobile exhaust is becoming more and more serious, and the environment around the road is constantly deteriorating. The main harmful components of automobile exhaust are NO X , HC compounds, CO, SO 2 , particles, etc., according to statistical calculations, the average daily emission of nitrogen oxides per 1,000 vehicles reaches 50-100kg, especially in some big cities, more than 40% of NO in air pollutants X , More than 80% of CO and more than 70% of HC compounds are caused by automobile exhaust. Therefore, the control of environmental pollution caused by automobile exhaust is of great significance to improving the quality of road use and protecting the environment. [0003] For the pur...

AI Technical Summary

Problems solved by technology

[0003] For the purification of automobile exhaust, in the field of roads, the technology of coating a layer of air-purifying materials on the surface of asphalt concrete roads is currently the main technology. The coating is mainly added to the carrier with TiO 2 Although the main exhaust gas decomposition catalyst can achieve certain effects, there are still many problems: (1) Due to the low concentration of pollutants in the air environment in practical applications, the carrier is coated with powdered TiO 2 The effective area is small, the contact time is short, and the light intensity is difficult to guarantee; (2) due to the low quantum yield of the catalyst itself, the rate of photocatalytic degradation is slow, and many harmful intermediate products will be produced, and the purification effect is not obvious; (3) ) Poor service durability, affecting the performance of asphalt pavement, and slowing down the service life of asphalt pavement; (4) Low reuse rate, non-recyclable, non-recyclable, poor sustainability; (6) Increase the road construction process, causing construction inconvenience and increasing construction costs

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