Performance of environment-friendly road coating based on porous properties(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2018年01期
- Page:
- 17-24
- Research Field:
- 道路工程
- Publishing date:
Info
- Title:
- Performance of environment-friendly road coating based on porous properties
- Author(s):
- GUO Teng-teng; ZHANG Lian; WANG Chao-hui; WANG Xin-qi; FENG Wei
- 1. School of Highway, Chang’an University, Xi’an 710064, Shaanxi, China; 2. Key Laboratory of Road Structure and Material of Ministry of Communications, Chang’an University, Xi’an 710064, Shaanxi, China; 3. Tianjin Municipal Engineering Design and Research Institute, Tianjin 300051, China
- Keywords:
- road engineering; coating; porous property; cooling; air purification; road performance
- PACS:
- U414
- DOI:
- -
- Abstract:
- In order to reduce pavement temperature, alleviate rutting disease of asphalt pavement and purify the vehicle exhaust to improve the environment of road, road coating with cooling and purification effects, named environment-friendly porous coating (WEPC), was prepared with porous materials as the functional materials. The effects of the functional materials’ dosage on basic performances of WEPC were analyzed. The cooling effect of WEPC road coating under different brushing amount was comprehensively evaluated by indoor and outdoor temperature measuring tests. The contents of various components of vehicle exhaust of WEPC road coating specimen at different intervals were tested by air purification performance box test, and then air purification effects of WEPC coating at different temperatures were comprehensively evaluated. Meanwhile, the pavement performances of WEPC coating were confirmed by surface tectonic depth and pendulum test, abrasion test, rutting test and durability test. And micro-structures of environment-friendly road coating materials with porous properties were analyzed by using the scanning electronic microscopy and infrared spectrum. The results show that WEPC coating has good basic performance when the dosage (mass fraction) of functional material is 20%. WEPC has a good cooling effect, the cooling effect is more significant under a greater amount of brushing, and the highest cooling effect can reach up to 10 ℃. Combined with basic properties of WEPC coating and cooling effect, the optimum brushing amount is recommended to be 0.8 kg/m2. WEPC coating has a certain effect on air purification at different temperatures and the purification effect is better under the heating interval. The purification rates of particulate matters with particle size below 2.5 (PM2.5) and below 10 microns (PM10) can reach up to more than 40%. In addition, the purification rates of carbon oxides, nitrogen oxides, and sulfur dioxides are about 25%. WEPC coating has good road performance in skid resistance, abrasion resistance, high temperature stability and durability, all of which can meet the requirements of the corresponding specifications. The functional material can be stably and evenly dispersed in the coating material, and some new functional groups are appeared in the coating material.
Last Update: 2018-02-06