Environment-friendly warm-mixing flame-retardant composite modifier for asphalt pavement

Abstract

The invention relates to an environment-friendly warm-mixing flame-retardant composite modifier for a tunnel pavement. The environment-friendly warm-mixing flame-retardant composite modifier is characterized by being prepared from the following raw materials in percentage by weight: 30-33% of APP, 7-9% of PER, 8-10% of MH, 2-4% of Sb2O3, 38-43% of zeolite, 3-5% of nano TiO2 and 3-5% of tourmaline powder, wherein the total mass ratio of the raw materials is 100%. The added amount of the composite modifier provided by the invention in the mixture is 15-16% of the asphalt mass; the additive materials are different in technical characteristics and functions, and a comprehensive modification effect can be realized on the asphalt mixture; the composite modifier can realize flame retardance and reduce the construction temperature, also can absorb heavy metals in the air and water and reduce the concentration of automobile exhaust, and is particularly suitable for the construction of the tunnel asphalt pavement.

Description

Technical field [0001] The invention belongs to the field of new materials for asphalt pavement, and specifically relates to an environmentally friendly warm-mix flame-retardant composite modifier for asphalt pavement. The environmentally-friendly warm-mix flame-retardant composite modifier is used to be added to tunnel asphalt mixture. Background technique [0002] my country's highways gradually extend from the plains and hilly areas to the mountains and hills, resulting in a large number of tunnels and tunnel groups. The traditional hydraulic concrete pavement in the tunnel has high rigidity, poor anti-skid performance, poor driving comfort, and unnatural connection with the road outside the tunnel. It has been gradually replaced by asphalt pavement. However, due to the closed and long space in the tunnel, the probability of traffic accidents is high. Once a fire occurs on the asphalt pavement, a large amount of toxic smoke will be produced, and the smoke inside the tunnel is ...

AI Technical Summary

Problems solved by technology

The traditional hydraulic concrete pavement in the tunnel has high rigidity, poor anti-skid performance, poor driving comfort, and unnatural connection with the pavement outside the tunnel. It has been gradually replaced by asphalt pavement

However, due to the long and closed space in the tunnel, the probability of traffic accidents is high. Once a fire occurs on the asphalt pavement, a large amount of toxic smoke will be generated, and the smoke inside the tunnel is not easy to discharge, which will easily increase the severity of the accident; The higher the temperature during the construction process, the more exhaust gas and dust will be released, the worse the environment inside the tunnel, and the greater the impact on the construction quality and the health of construction workers; at the same time, the pollution caused by vehicle exhaust emissions continues to intensify. Especially, the poor air condition

As a kind of modifier, flame retardant is often used in tunnel asphalt pavement to improve the above situation. Although there are many types of modifiers used in tunnel asphalt pavement, they also have certain flame retardant effect, but the flame retardant effect is often in general. , high production temperature conditions, complex adding process, single modification function, etc., there are few solutions with better comprehensive effects

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