纳米二氧化硅与橡胶粉复合改性沥青的抗紫外光老化性能

Resistance to Ultraviolet Aging of Nano-SiO and Rubber Powder Compound Modified Asphalt.

作者信息

Qian Guoping, Yang Changdong, Huang Haidong, Gong Xiangbing, Yu Huanan

机构信息

State Engineering Laboratory of Highway Maintenance Technology, Changsha University of Science and Technology, Changsha 410114, China.

出版信息

Materials (Basel). 2020 Nov 10;13(22):5067. doi: 10.3390/ma13225067.

DOI:10.3390/ma13225067

PMID:33182752

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7698000/

Abstract

Ultraviolet (UV) aging degrades the life span of asphalt pavement, nanomaterials used as modifiers exhibit good shielding function on UV light, but generally degrade the low-temperature property of asphalt, a compound modification was found to be a solution. In this study, nano-SiO and rubber powder were blended together with base asphalt to prepare compound modified asphalt. Compound modified asphalt with different blending dosages were subjected to UV light via a self-made UV aging simulation chamber. Basic performance tests and rheological tests were conducted including the UV aging influence. An optimum compound ratio was finally recommended based on the goal to remove the adverse effect of nano-SiO on the thermal cracking. Results show that the anti-UV aging property of asphalt is improved obviously due to the blocking function of nano-SiO and carbon black in rubber powder, and the enhancing effect of nano-SiO is found to be the most significant.

摘要

紫外线（UV）老化会缩短沥青路面的使用寿命，用作改性剂的纳米材料对紫外线具有良好的屏蔽作用，但通常会降低沥青的低温性能，复合改性被认为是一种解决方案。在本研究中，将纳米二氧化硅（nano-SiO）和橡胶粉与基质沥青混合，制备复合改性沥青。通过自制的紫外线老化模拟箱对不同掺量的复合改性沥青进行紫外线照射。进行了包括紫外线老化影响的基本性能试验和流变试验。最终基于消除纳米二氧化硅对热裂化的不利影响这一目标，推荐了最佳复合比例。结果表明，由于纳米二氧化硅和橡胶粉中炭黑的阻隔作用，沥青的抗紫外线老化性能明显提高，且纳米二氧化硅的增强效果最为显著。