Test device and test method for evaluating water resistance performance of aggregate surface pitch

Abstract

The invention discloses a test device and a method for evaluating a water resistance performance of an aggregate surface pitch. The test device comprises an environment box, a computer, a water reservoir located in the environment box, a lifting device, a first basket, a second basket, a first weighting device and a second weighting device, wherein the first weighting device is used for weighting the weight of the first basket; the second weighting device is used for weighting the weight of the second basket; the water reservoir is fixed at the bottom of the environment box; the first basket and the second basket are both fixed at the top of the environment box through the lifting device; the first basket and the second basket are located above the water reservoir; the first weighting device and the second weighting device are both connected with the computer. The device and the method can realize the evaluation on the water resistance performance of the aggregate surface pitch.

Description

technical field [0001] The invention relates to a test device and method, in particular to a test device and method for evaluating the water-resistance performance of an asphalt film on the aggregate surface. Background technique [0002] Asphalt pavement has the advantages of comfortable driving and good performance, which can ensure the car to run quickly and with low noise. Moreover, asphalt pavement has the advantages of fast construction, fast open traffic, convenient maintenance, and recyclability, so it is widely used all over the world. . In recent years, as some high-grade asphalt roads have suffered serious water damage, this damage situation has gradually attracted the attention of researchers from various countries. At present, there are still some deficiencies in tests such as the freeze-thaw splitting test for testing the water damage resistance of asphalt pavement, and cannot be used to determine the role of the water resistance of the asphalt film on the agg...

AI Technical Summary

Problems solved by technology

The mechanism of water damage to asphalt pavement is related to two processes. First, water can penetrate into asphalt to reduce the adhesion of asphalt, which leads to a decrease in the strength and stiffness of asphalt mixture. Second, water can enter the asphalt film and aggregates. Between materials, the mutual bonding between asphalt and aggregate is blocked. Since the surface of aggregate has a stronger adsorption force for water than asphalt, the contact between asphalt and aggregate surface is reduced, and the asphalt peels off from the surface of aggregate, and the asphalt mixture The strength gradually decreases, and under the combined action of the traffic load, the water damage is obviously aggravated, resulting in rutting, looseness, potholes and local structural damage on the asphalt concrete pavement. However, the existing tests for testing the water damage resistance of the asphalt pavement are all The role of water resistance of asphalt film on the surface of aggregates in the water damage resistance of asphalt mixture has not been considered, so it is necessary to design a device and method that can realize the evaluation of water resistance of asphalt film on the surface of aggregates

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