Flame-retared modified asphalt mixed stock

Abstract

The invention refers to a kind of bituminous mixture, is especially applied to modified bituminous mixture with the effect of combustion-supporting used in the paving of inner road surface of calzada's tunnel and is composed of between 1 and 10 of combustion-supporting asphaltum and between 80 and 95 of mixture of detritus and mineral powder. The combustion-supporting asphaltum includes between 20% and 40% of modified asphalt, between 2% and 30% of halogen combustion adjuvant, between 2% and 4% of phosphorus-containing mineral and between 10% and 20% of smoke-repressing agent and the mixture of detritus and mineral powder is composed of between 60% and 80% of detritus, with the grain size of 4.75mm and 13.2mm, the between 9% and 25% of machine-made sand, with the grain size of between 0.05mm and 4.75mm, and between 7% and 18% of mineral powder. The asphaltum road surface of tunnel paved with it has better high temperature performance, age resistance and temperature sensibility than ordinary asphaltum, improves its intensity and stability and has obvious effect of inflaming retarding and smoke-repressing.

Description

technical field [0001] The invention relates to an asphalt mixture, in particular to a modified asphalt mixture suitable for road surface pavement in a highway tunnel and capable of flame retardant effect. Background technique [0002] With the rapid development of expressways in our country, the number of highway tunnels is also increasing. As a special road section of the highway, the highway tunnel has a length ranging from a few hundred meters to several kilometers. It is assumed that in this special road section, once a car circuit fire occurs, a car cargo fire and a traffic accident ) subversion caused by fire, there will be large smoke, high temperature, difficulty in exhausting smoke, difficulty in evacuation, difficulty in fire fighting and other phenomena, and the consequences are unimaginable. There have been many accidents of this kind in the road circles at home and abroad, and the losses have been heavy. It can be seen that for the fire prevention of highway ...

AI Technical Summary

Problems solved by technology

But it is mainly used on the roof as a waterproof material, not on the road

[0008] Invention patent 92105725.3 also discloses a kind of non-combustible asphalt and linoleum. Its production method is to apply fire-resistant, flame-retardant and temperature-resistant chemicals such as sodium bicarbonate in the asphalt, and a layer of fire-resistant and temperature-resistant coating liquid is applied on the prepared linoleum. , so that it can be effectively fireproof when applied to building materials. However, this kind of asphalt felt is rarely used on tunnel roads

However, among the existing flame retardant technologies, few compare "flame retardant" with "smoke suppression". Moreover, for some polymers, "smoke suppression" is more important than "flame retardant", especially those containing Halogen-based flame retardants are the main source of smoke. Therefore, whether to develop a high-efficiency flame retardant that can both flame-retardant and smoke-suppressing is the main direction and trend of the industry in the future.

Images