Testing method of interlayer bonding power of asphalt pavement

Abstract

The invention relates to a testing method of interlayer bonding power of an asphalt pavement. The testing method comprises the following steps: preparing a test piece: bonding a lower-layer cement concrete test piece with upper-layer asphalt concrete through bonding layer oil; (2) mounting the test piece: putting a test piece to be tested into a lower clamp and slowly lowering a pressing head; continually lowering the pressing head so as to tightly stick an upper mold and the lower mold; and tightly fixing the upper and lower clamps with the test piece respectively; (3) starting to test: starting a pressure machine and adjusting the speed; starting to carry out a pulling test to enable a force value and displacement on a display device to be changed; and when the test piece is pulled to be opened and the force value reaching a peak valve, recording. According to the testing method of the interlayer bonding power of the asphalt pavement, a vertical load of the asphalt pavement can be really simulated and bonding power parameters are obtained; and evaluation of bonding performances of an interlayer material is convenient to realize.

Description

technical field [0001] The invention relates to a test fixture for measuring interlayer cohesive force, in particular to a test method for interlayer cohesive force of asphalt pavement. Background technique [0002] The current asphalt pavement design in my country is based on the theory of elastic layered systems. When calculating and analyzing the stress-strain response of the pavement structure, it is assumed that each layer of the asphalt pavement is a continuous elastic body. It is difficult to achieve complete continuity. Under the action of traffic and environmental factors, interlayer damage often occurs due to insufficient interlayer bonding and it is difficult to resist the shear force generated by wheel loads, resulting in various diseases such as shifting, rutting, and wrapping on the road surface. Therefore, improving and strengthening the bonding between asphalt pavements is of great significance for increasing the shear strength of interlayer materials and pre...

AI Technical Summary

Problems solved by technology

[0004] At the current stage, there are many interlayer shear strength test methods used in engineering, but there are many shortcomings, which have a great impact on the test results. The main problems are as follows: ① The working environment of the road surface cannot be truly simulated, that is, the obtained data are not The utilization value is mainly manifested in: vertical load is not considered; ② There is no automatic data collection equipment during the test, and the test accuracy is seriously affected by manual measurement and recording; Situational test results have low accuracy and poor operability

[0005] At present, there is no test method for the evaluation of the adhesion performance of asphalt pavement interlayer materials

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