Appraisement method for asphalt mixture hydrosphere steadiness test

Abstract

The invention discloses a water stability testing and evaluation method of a bituminous mixture, comprising the following steps: (1) a plurality of fashioned cylindrical test pieces of the bituminous mixture are prepared; (2) the test pieces are separated into two uniform groups that have the same average void ratio; (3) diametric compression experiment of a first test piece group is directly implemented, thus measuring the diametric compression intensity and computing the average value TS0; (4) a second test piece group is repeatedly rinsed for 50 times under the action of alternate positive and negative pressure, and then the diametric compression experiment is implemented, thus measuring the diametric compression intensity and computing the average value TS1; and (5) the ratio TSR between the two average diametric compression values is taken as an evaluating indicator. The water stability testing and evaluation method of the bituminous mixture combines the hydrodynamic pressure, and the aerodynamic force and the environmental temperature that are generated under the coupled conditions of driving and the surroundings into the experiments, consequently, the experimental environment conditions is closer to the actual road conditions, the experimental result has better correlation with the actual application effect, and the method is more reliable and effective.

Description

Technical field [0001] The invention belongs to the technical field of road engineering material design and construction control, and relates to an asphalt mixture water stability test evaluation method, and test detection analysis on a construction site. Background technique [0002] In the design and construction control of road engineering materials, the water stability design and evaluation of asphalt mixture is a very important and indispensable item to evaluate the ability of the pavement to resist natural rainfall and other external water erosion. At present, the water stability evaluation generally adopts test methods based on freeze-thaw cycles, such as the Lottoman Test, Tunnicliff & Root Test, and Modified Lottoman Test in the United States. my country draws on the characteristics of the American method, and also proposes the freeze-thaw splitting test using the freeze-thaw cycle method. [0003] The process and characteristics of the so-called freeze-thaw cycle are as...

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a water-air stability test and evaluation method of asphalt mixture that can simulate the dynamic effects of driving and environment, so as to overcome the defect that the existing freeze-thaw cycle evaluation method is inconsistent with the actual road surface conditions, The hydrodynamic pressure, aerodynamic force and ambient temperature generated under the coupling conditions of driving and environment are included in the test, so that the test environment conditions are closer to the actual road conditions, and the test results have a better correlation with the actual application effect. The method is also more reliable and effective

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