Method for evaluating low-temperature performance and fatigue performance of crack filling adhesive for asphalt pavement

Abstract

The invention belongs to the technical field of preventive maintenance of highway asphalt pavements and particularly relates to a method for evaluating the low-temperature performance and the fatigue performance of a crack filling adhesive for an asphalt pavement. The method comprises the following steps of (1) carrying out low-temperature drawing test; (2) carrying out indirect tensile fatigue test; and (3) carrying out evaluation on the low-temperature drawing test and the indirect tensile fatigue test. The low-temperature drawing test is used for simulating the cracking resistance of the pavement repaired by the crack filling adhesive under the tension action of an external force under the most unfavorable low-temperature condition; and the indirect tensile fatigue test is used for simulating the anti-fatigue performance of the pavement repaired by the crack filling adhesive under the action of an external load. The method for evaluating the low-temperature performance and the fatigue performance of the crack filling adhesive for the asphalt pavement is closer to the actual pavement crack repairing condition and is capable of quantitatively and quickly judging the low-temperature performance and the fatigue performance after cracks of the asphalt pavement are repaired with the crack filling adhesive.

Description

technical field [0001] The invention belongs to the technical field of preventive maintenance of highway asphalt pavement, and in particular relates to a method for evaluating the low temperature and fatigue performance of a joint filling glue used for asphalt pavement. Background technique [0002] More than 90% of the highways in our country use asphalt concrete pavement. With the wide use of asphalt pavement structure in my country's high-grade highways, various early diseases of asphalt pavement gradually appear, such as cracks, ruts, potholes, etc. Among them, cracks are the most common and most important disease of asphalt pavement. [0003] The appearance of cracks makes the road surface rainwater seep into the pavement structure through the cracks, causing the cracks to expand and cause secondary damage, which seriously weakens the smoothness and bearing capacity of the road, and eventually leads to serious damage to the road, affecting driving comfort and even endan...

AI Technical Summary

Problems solved by technology

The performance of the joint glue material directly affects the crack filling effect. The joint filling material with good performance can maintain the cracks on the pavement for several years after the crack is repaired. The joint filling material with poor performance will experience a winter and summer after the crack is repaired. Serious damage will occur, resulting in a situation of replenishment every year, wasting manpower and material resources

[0006] At present, the low-temperature tensile method is used to evaluate the low-temperature and anti-fatigue performance of joint glue. This method uses cement modules for testing, which is inconsistent with the actual asphalt pavement, and it takes a long time for a test. The test results can be obtained by observing the joint Judging the performance of glue and joint cracking is subjective to a certain extent. Therefore, it is necessary to find a test method that can better simulate the repair of asphalt pavement cracks, and at the same time is convenient, quick, and quantitative. performance evaluation

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