掺稻壳灰乳化沥青冷再生混合料性能研究

为了研究稻壳灰是否能够作为填料在乳化沥青冷再生混合料中使用，将不同掺量的稻壳灰和矿粉加入混合料中分别作为试验组和对照组.采用间接拉伸试验、低温劈裂试验、高温车辙试验和冻融劈裂试验分别测试了混合料的力学性能、低温性能、高温性能和水稳定性，采用电镜扫描和EDX能谱分析得到了稻壳灰的微观结构和主要元素成分.研究结果表明，稻壳...

Study on Performance of Emulsified Asphalt Cold Recycled Mixture Mixed with Rice Husk Ash

In order to study whether the rice husk ash can be used as filler in cold recycled emulsified asphalt mixture, different amounts of rice husk ash and mineral powder were added into the mixture as experimental group and control group. The mechanical properties, low-temperature properties, high-temperature properties, and water stability of the mixture were tested by indirect tensile test, low-temperature splitting test, high-temperature rutting test, and freeze-thaw splitting test, respectively. The microstructure and main elements of rice husk ash were ob? tained by scanning electron microscope and EDX energy spectrum analysis. The results show that rice husk ash has a larger specific surface area, higher porosity, and amorphous silica content. Compared with mineral powder, rice husk ash can improve its high-temperature and mechanical properties when added into the cold regenerated mixture. In or? der to meet the requirements of low-temperature performance and water stability, the percentage of rice husk ash as a filler should not exceed 3% of aggregate and other filler mass sum. The conclusion is that it is feasible to add rice husk ash into cold recycled emulsified asphalt mixture as the road base in arid and non-cold regions.