Study on the Road Performance of Modified Asphalt Mixture with Activated Coal Gangue Powder/Water Magnesite Fiber Composite
Asphalt pavement is directly exposed to the natural environment and subjected to the combined action of environmental and vehicle loads.Optimizing the material composition of asphalt mixture to improve the service life of asphalt pavement is an important research direction in the field of highway traffic.Coal gangue is the waste material selected during coal mining and washing,and is one of the largest industrial solid waste emissions in China.The large-scale accumulation of coal gangue will have a great impact on land and the environment.At present,there are few research results at home and abroad on the modification of asphalt mixture with coal gangue powder as filler.Based on the previ-ous research,this study conducted research on the road performance of modified asphalt mixture with activated coal gangue powder/water mag-nesite fiber composite to achieve the dual effects of waste utilization and improvement of asphalt pavement road performance.The research re-sults show that the use of coal gangue powder as a substitute for mineral powder can improve the high-temperature stability of asphalt mixture,but has a certain degree of weakening on its low-temperature anti-cracking performance.The addition of water magnesite fiber improves and enhances the low-temperature anti-cracking performance of asphalt mixture.The composite addition of activated coal gangue powder and water magnesite fiber can improve the water stability of asphalt mixture.The research results will provide theoretical and experimental basis for impro-ving the utilization rate of coal gangue and water magnesite fiber in road engineering and optimizing the road performance of asphalt mixture.
国家科技期刊平台
NSTL
万方数据
