Environment-friendly type flame-proof asphalt mastic stone mixture for tunnel

Abstract

The invention discloses an environment friendly type tunnel flame-proof pitch water chestnut ether broken stone mixed material, which comprises the following steps: counting with the total weight proportion of the pitch mixed material as 0. 3%-0. 5% mineral fiber, 1. 0%-1. 2% organic fire retardant, 5. 5%-6. 0% pitch, 92. 3-93. 2% broken stone; choosing the mineral fiber with the density not less than 2. 5g / cm3 and strength for extension as 3500MPa; choosing the elastic modulus of the mineral fiber as 85GPa, percentage of breaking elongation as 2. 5%, the highest working temperature at 500 deg. c and the length more than 6mm; choosing the organic fire retardant with the density at 1. 2-2. 0g / cm3 and the effective content not less than 70%; setting the fusion temperature of the organic fire retardant not less than 120 deg. c, the moisture percentage less than 5% and the fire point not less than 260 deg. c. This mixed material can prevent burning of tunnel pitch water chestnut ether broken stone mixed material (SMA) pavement effectively, which possesses environmental protection function.

Description

technical field [0001] The invention relates to a material for tunnel asphalt pavement, in particular to a pavement mixed material for solving the problems of flame retardancy and environmental protection, and belongs to the technical field of road asphalt pavement material manufacturing. Background technique [0002] 1. Investigation of tunnel fire accidents [0003] Tunnels are an important part of expressways, and are often the throat of expressways. Due to the relative closure of large tunnels, tunnel fires not only cause serious damage to tunnel facilities and tunnel structures, but also cause road traffic interruptions ranging from a few days to tens of days or even longer, and seriously threaten human life and property safety. , causing incalculable economic losses. Once a fire breaks out in the tunnel, a large amount of smoke and heat are not easy to get rid of. The tunnel is full of smoke, lighting is damaged, visibility is reduced and accompanied by high temperat...