Performance testing method for broken stone sealing layer and asphalt amount determination method

Abstract

The invention discloses a performance testing method for a broken stone sealing layer. The method comprises the following steps: making the broken stone sealing layers having a same area on a cushionblock, weighing the test piece on the broken stone sealing layer and recording a weight value as m0, wherein the size of the cushion block is smaller than the size of an asphalt mixture rutting plate,and placing the surface of the broken stone sealing layer upward in a wheel track tape of the rutting plate; fixing a positive surface of the broken stone sealing layer at center of the wheel track tape of the rutting plate, carrying out a rutting test, immediately removing the test piece on the broken stone sealing layer after test is finished, weighing the test piece and recording the weight value as m1, placing the surface of the broken stone sealing layer downward to dried fine sands at the temperature of 60 DEG C, performing standing for a while and taking the test piece out, removing superfluous sands and weighing the test piece, and recording the weight value as m2, and using a difference value of m2 and m1 to symptom the asphalt flushing degree of the broken stone sealing layer. The invention also discloses an asphalt amount determination method of the broken stone sealing layer. The method effectively solves the problem of difficult quantitative determination of the asphalt flushing degree of the broken stone sealing layer, the asphalt amount is more accurate, and the test process is simple.

Description

technical field [0001] The invention relates to the field of civil engineering materials, in particular to a method for testing the performance of a gravel seal and a method for determining the amount of asphalt. Background technique [0002] Due to a series of excellent properties such as good waterproof performance, high-strength interlayer cohesion and shear resistance, and good crack resistance, the crushed stone seal is currently widely used in our country. In the case of a certain amount of gravel, too much asphalt will increase the cost on the one hand, and cause serious diseases such as oil flooding on the other hand. If the amount of asphalt is too small, the durability of the gravel seal will be poor. It will cause problems such as falling of gravel. Therefore, the determination of the amount of asphalt in the gravel seal is the key to ensure the quality of the gravel seal. [0003] At present, the determination of the amount of asphalt in the gravel seal is stil...

AI Technical Summary

Problems solved by technology

In addition, when making gravel seals on rut slabs, it is more convenient to make test specimens if emulsified asphalt and other binders with fluidity under normal temperature conditions are selected. The binder is modified asphalt such as rubber asphalt, which has a certain fluidity at high temperature. Then, at room temperature, due to the rapid drop in temperature of the asphalt, the production area of ​​the sealing layer is large, and it is difficult to make a 30cm×30cm gravel sealing layer test piece. High, very low success rate

[0006] From the above discussion, it can be found that the two common test methods used to determine the amount of asphalt in the gravel seal have their own disadvantages, and the universality is not high

However, pure theoretical calculations are not convincing enough. Therefore, there is an urgent need for a simple, accurate, efficient and efficient test method to determine the amount of asphalt in the gravel seal.

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