Low-smoke asphalt and method for reducing smoke generated during asphalt concrete road surface construction

Abstract

The invention discloses low-smoke asphalt comprising base asphalt, smoke inhibitor SBS and lipophilic type nanometer calcium carbonate, wherein the weight of the smoke inhibitor SBS is 3-4% of that of the base asphalt; and the weight of the lipophilic type nanometer calcium carbonate is 4-5% of that of the base asphalt. The invention also discloses a method for reducing the smoke generated during asphalt concrete road surface construction. The invention can reduce about 28-30% of asphalt smoke under the precondition without reducing the blending temperature and the road surface performance of asphalt mixing materials in the asphalt concrete road surface construction process.

Description

technical field [0001] The invention relates to an environment-friendly pavement application technology, in particular to a low-smoke asphalt and a method for reducing smoke in asphalt concrete pavement construction based on the low-smoke asphalt. Background technique [0002] The asphalt fumes generated during the paving of ordinary asphalt concrete pavement are harmful to human health and the environment. Petroleum asphalt, the main component of asphalt pavement, is a mixture of hydrocarbons and hydrocarbon derivatives with different properties and molecular weights. When the asphalt pavement mixture is mixed and paved at a high temperature of about 170°C, some small molecular organic compounds (liquid and gaseous hydrocarbons) in the asphalt will volatilize and exist in the air in the form of aerosols, forming asphalt Smoke, the asphalt smell we smell at asphalt pavement construction sites. Existing studies have shown that asphalt fumes volatilized under high temperatur...

AI Technical Summary

Problems solved by technology

4) Asphalt fume will also have a certain impact on the atmospheric environment

However, during the mixing and paving process of asphalt pavement mixture, unpleasant asphalt fumes are often produced, especially in urban road pavement construction with poor ventilation conditions and high population density, the fumes generated during paving volatilize The speed is slow, and the smell of asphalt smoke affects the production and life of residents on both sides of the street, and affects the environment; in the construction of asphalt pavement paving in mountainous road tunnels and deep excavation cuts, due to poor ventilation conditions, the paving construction temperature High, the volatilization and diffusion speed of asphalt fume is slow, the concentration is high, the asphalt fume not only smells bad, reduces the construction efficiency, but also endangers the health of construction workers