Test device and test method for asphalt rotational shear creep and repeated creep recovery

Abstract

The invention belongs to the field of asphalt mechanical performance tests and particularly relates to a test device and a test method for asphalt rotational shear creep and repeated creep recovery. The device comprises a test platform, a test specimen, a temperature control system, a loading system and a computer control system. The computer control system automatically controls maintenance temperature and creep test temperature of the test specimen through the temperature control system. Simultaneously, the computer control system further controls the loading system to complete asphalt rotational shear creep and repeated creep recovery of the asphalt test specimen. The device is applicable to testing creep and repeated creep recovery performance of asphalt cements such as common asphalt, SBS (styrene butadiene styrene block copolymer) modified asphalt, rubber asphalt and other polymer modified asphalt under rotational shear and temperature-control environments.

Description

technical field [0001] The invention belongs to the field of asphalt mechanical performance testing, in particular to the test and measurement of asphalt creep and repeated creep recovery performance. Background technique [0002] The viscoelastic mechanical properties of asphalt materials are closely related to their pavement performance. Among them, the shear creep properties of asphalt materials under shear load can be used to evaluate the rutting resistance (permanent deformation resistance) of asphalt pavement. Shear creep and repeated shear creep recovery tests have become one of the important methods to study the viscoelastic behavior of asphalt materials. Existing creep testing machines are mainly for metal or special non-metallic materials, and the loading method is axial tension or compression. At the same time, general creep testing machines lack temperature control measures and cannot be directly used for shear creep of asphalt materials. performance test. [0...

AI Technical Summary

Problems solved by technology

Since DSR is a high-end imported device, it is difficult to modify it; in addition, the torque range of DSR is generally small (not exceeding 150N mm), and its application range is greatly limited

In view of the lack of special test equipment for asphalt rotational shear creep and repeated creep recovery performance tests in the prior art, the present invention provides a kind of equipment with good performance under the conditions of automatic repeated rotational shear loading, load holding, unloading and automatic temperature control. Economical and Applicable Asphalt Rotary Shear Repeated Creep Recovery Test Device and Method

Images