Preparation method of sand-mist sealant material with self-healing function

Abstract

The invention provides a method for preparing a sandy mist sealant material with a self-healing function, which solves the problems of insufficient anti-skid performance, easy aging and cracking, lack of repeated self-healing function, poor durability, and inability to rely on natural environment temperature field cycles for current mist sealant materials. Change achieves self-healing problems. The present invention first selects machine-made sand as the fine aggregate of the sand-containing mist seal layer and carries out reasonable gradation design; then, selects shape memory fibers with suitable phase transition temperature for stretching training, endows the fibers with shape memory properties; selects phase transition Thermoplastic granules with suitable temperature are used as additives for the sand mist seal layer, so that they can melt when reaching the appropriate temperature and then seal the cracks; then, weigh an appropriate amount of emulsified asphalt, shape memory fiber, thermoplastic granules, fine aggregate and water to mix evenly to obtain Sand mist sealant material; finally, by testing the mixing uniformity, the mix ratio design of each component of the sand mist sealant is further optimized, so that the mist sealant material has good self-healing performance and anti-skid performance.

Description

technical field [0001] The invention relates to a preparation method of a sand mist-containing sealing layer material with self-healing function, and belongs to the technical field of asphalt pavement preventive maintenance. Background technique [0002] With the rapid development of road construction in our country, the workload of road maintenance is increasing day by day. Many road surfaces have to be rebuilt due to the lack of timely maintenance when early diseases appear, and eventually develop into serious structural damage. This not only prevents the drivers and passengers from getting a comfortable driving experience when driving, but also leads to the evolution of road performance that can be restored at a small cost to expensive re-paving. Studies have shown that early pavement diseases are mostly functional diseases, such as peeling of asphalt film on the aggregate surface, loose aggregates on the pavement surface, micro cracks, water seepage, etc. These diseases ...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a method for preparing a sandy mist sealant material with self-healing function, which solves the problem of insufficient anti-skid performance, easy aging and cracking, lack of repeated self-healing function, poor durability, and inability to rely on natural mist sealant materials. The cyclical change of the ambient temperature field realizes the problem of self-healing, thereby improving the pavement maintenance effect and pavement performance, and improving service quality

[0012] In view of the problems that the current fog seal layer has insufficient anti-skid performance, easy aging and cracking, lack of repeated self-healing function, poor durability, and cannot rely on the cyclical changes in the natural environment temperature field to achieve self-healing, the present invention goes deep into the self-healing of the fog seal layer material The self-healing performance of the fog seal layer material is enhanced from both macro and micro perspectives, and the anti-slip performance of the fog seal layer material is enhanced by adding fine aggregates with reasonable gradation, providing a self-healing material with self-healing properties. A preparation method of a sand-mist sealant material with healing function, so that the road surface cured by the sand-mist sealer has the function of self-healing in the natural environment without significantly reducing the skid resistance of the road surface