Method for testing deicing effect of rubber grain bituminous pavement

Abstract

The invention discloses a method for testing a deicing effect of a rubber grain bituminous pavement. The dynamic function of a tire to an ice layer can be simulated well; a testing instrument is simple and convenient and low in cost; the time that a steel ball falls down repeatedly can be shortened; a maximum crack length is adopted as the key factor of evaluation indexes; and the measuring working amount is small. The method needs no assistance of an oil jacks or an electric system, and can be used for testing the deicing effect in indoor rubber grain pitch mixing material design.

Description

technical field [0001] The invention relates to a method for testing the deicing effect of road surfaces, in particular to a method for testing the deicing effect of rubber particle asphalt pavement. Background technique [0002] There are two types of deicing methods for asphalt pavement at home and abroad: active and passive. Active deicing methods mainly include adding elastic material pavement technology, adding saline pavement technology and thermal ice and snow melting technology. Passive deicing includes common methods such as spraying deicing agent, mechanical deicing, and manual deicing. The invention aims at the active deicing technology of asphalt pavement with elastic material added. The common deicing pavement filled with elastic materials at home and abroad is rubber particle asphalt pavement. The evaluation methods for the deicing effect of this kind of pavement mainly include the following types: ice layer bond strength test, static load test, imitation rutt...

AI Technical Summary

Problems solved by technology

The common deicing pavement filled with elastic materials at home and abroad is rubber particle asphalt pavement. The evaluation methods for the deicing effect of this kind of pavement mainly include the following types: ice layer bond strength test, static load test, imitation rutting test, etc., among which ice The layer bond strength test can quantitatively obtain the bond strength between the ice layer and the specimen as an index to evaluate the deicing performance, and its load action mode is also in line with the failure mode of the ice layer, but it has the following shortcomings: ① test The operation is more complicated, and it is inconvenient to implement on site; ②The test takes a long time; ③The existence of non-woven fabric changes the mechanical properties of the ice layer, which cannot reflect the real situation

The static load test adopts the static load method, which to a certain extent simulates the compressive stress state exerted by the wheel load on the ice layer on the road surface, but in fact, the ice layer on the road surface bears the dynamic and repeated action of the vehicle load. Therefore, This method is poor in simulating the actual situation

The imitation rutting test can well simulate the force condition of the ice layer under the repeated rolling action of the wheels, and the operation is simple, and the test results are intuitive. Large areas and short cracks are bound to be time-consuming, and are greatly affected by subjective factors

In addition, the value of the influence factor used for crack area conversion is also open to discussion

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