摘要
考虑沥青混合料的低温性能,进行沥青路面下面层混合料AC-20的原材料配合比设计,确定材料级配及最佳油石比,进行不同成型温度下的沥青混合料性能研究,从而确定沥青混合料下面层成型温度。试验结果表明:寒冷地区AC-20的生产配合比最佳沥青用量为4.7%,适用于寒冷地区AC-20沥青混合料的适宜压实温度为140~170℃间,低温界定温度110℃,低于此成型温度的沥青混合料的各项性能下降速度很迅速。
Considering the low temperature performance of asphalt mixture,the raw material ratio design of the underlying layer AC-20 of asphalt pavement is carried out,the material gradation and the best oil-stone ratio are determined,and the performance of asphalt mixture under different forming temperatures is studied to determine The formation temperature of the underlying layer of the asphalt mixture.The test results show that the optimum ratio of production of AC-20 in the cold area is 4.7%.It is suitable for cold region AC-20 asphalt mixture with suitable compaction temperature between 140℃and 170℃,and low temperature for 110℃.The performance of the asphalt mixture below this molding temperature is degraded rapidly.
出处
《建筑技术开发》
2019年第11期74-76,共3页
Building Technology Development
