An evaluation method for the smoke suppression performance of flame-retardant asphalt mixture

Abstract

The invention relates to a method for evaluating smoke suppression performance of flame retardant asphalt mixture, belonging to the field of road engineering. The method comprises the following specific steps of: manufacturing a track test piece of flame retardant asphalt mixture with the standard size of 300 mm*300 mm*50 mm according to the T0703-1993 wheel grinding method in Test Instructions of Road Engineering Asphalt and Asphalt Mixture (JTJ052-2000); after curing the test piece, demoulding to carry out a direct combustion simulation test, and photographing a combustion smoke picture of the test piece; processing the photographed combustion image picture, dividing the picture into a plurality of small grids, and circling combustion smoke in the picture; calculating the area of smoke through a formula according to the processed picture, and evaluating the smoke suppression performance of the flame retardant asphalt mixture according to the area of the smoke. The smoke suppression performance of the flame retardant asphalt mixture is evaluated by using the method; the disadvantages of insufficient test equipment, expensive cost, high operation difficulty and the like are overcome; furthermore, the relevance between the test result and the smoke suppression performance of the flame retardant asphalt mixture is good.

Description

technical field [0001] The invention belongs to the field of road engineering and relates to a method for evaluating the smoke suppression performance of flame-retardant asphalt mixture. Background technique [0002] With the expansion of traffic demand, the proportion of tunnels and underground passages in road construction is gradually increasing. The shortcomings of cement pavement, such as slow open traffic and poor driving comfort, restrict its application in highway tunnels; while asphalt pavement has become the current development trend of road paving due to its advantages such as low noise, good skid resistance, and comfortable driving. However, the tunnel is a relatively closed special structure, and asphalt is a kind of flammable substance, which is easy to cause a fire in the event of a traffic accident. The resulting smoke will permeate the entire tunnel and cannot be dissipated quickly. The smoke contains a small amount of benzene, Volatile substances such as n...

AI Technical Summary

Problems solved by technology

[0011] The first three of the above evaluation methods measure the smoke quality produced by the combustion of flame-retardant asphalt, and the fourth method calculates the smoke density generated by the combustion of flame-retardant asphalt mixture through measurement, and quantitatively analyzes the smoke suppression effect of flame-retardant asphalt. However, the operation of these methods requires relatively sophisticated test equipment, and the test cost is expensive.

For laboratories with limited test conditions, it is very difficult to conduct smoke suppression performance evaluation tests, and the first three can only be tested on flame-retardant asphalt, which cannot simulate the combustion of road asphalt mixture well.

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