A Method for Evaluation of Shape Memory Performance of Sand-Mist Sealant Material

Abstract

The invention provides a method for evaluating the shape memory performance of a sand mist seal layer material, which belongs to the technical field of asphalt pavement materials, and solves the problem that the shape memory performance evaluation method of the current shape memory performance evaluation method is difficult to measure the shape fixation rate and recovery of the slurry material such as a sand mist seal layer. Rate index, the lack of methods to evaluate the shape memory performance of sand-mist sealant materials. In the present invention, the shape-memory short fibers and thermoplastic particles whose phase transition temperature matches the highest temperature field on the road surface are firstly selected, and the shape-memory function of the short fibers is given to the short fibers through pre-deformation; then, sand mist-containing sealing materials with different content of shape-memory fibers are prepared The test piece was cured; secondly, the triaxial dynamic creep test was carried out to obtain the deformation amount of different cycles, and the shape memory index was defined as the evaluation index; finally, the optimal dosage of shape memory short fiber was determined by comparing the shape memory index . Improve the mix ratio design of the sand mist sealant material to meet the self-healing performance requirements of the sand mist sealant material on the asphalt pavement.

Description

technical field

[0001] The invention relates to an evaluation method for the shape memory performance of a sand mist-containing sealing layer material, which belongs to the technical field of asphalt pavement materials. Background technique

[0002] In recent years, with the continuous development of science and technology and the continuous progress of human society, people have higher and higher requirements for materials, and various new materials have emerged. Shape memory materials are one of them, as a typical representative of new materials , shape memory materials have broad application prospects. With the deepening of research work, shape memory polymers have been widely used in daily life, medical technology, aerospace and civil engineering and many other fields by virtue of their excellent shape memory effect, such as packaging, heat shrinkable hose, auto Adjustable appliances and foams, microsystems, biomedical devices, space expandable structures, etc. In addi...