严寒地区路面面层沥青混合料配合比及路用性能试验研究

Study on Asphalt Mixture Mixing Ratio and Application Performance Test for Pavement in Severe Cold Area

以综合性能较好的SMA-16沥青混合料为研究对象,根据相关材料及严寒地区气候特点对沥青混合料配合比进行设计,并对其路用性能展开研究,以有效延长沥青路面使用寿命,节约养护维修费用。根据研究结果,提出关键筛孔4.75 mm通过率在25%~30%之间,0.075 mm筛孔通过率控制在8%以上;适当增加级配中细集料的含量,降低粗集料的含量的建议,可有效提高严寒地区沥青路面的路用性能,延长路面使用寿命。

The SMA-16 asphalt mixture with good overall performance is studied in this paper, the mixing ratio of asphalt mixture is designed based on relevant material and climate characteristics in severe cold area, and study it application performance, so to effectively prolong service life of asphalt pavement and save maintenance cost. According to study results, this paper suggests passing ratio by sieve 4. 75mm be 25% ？ 30%,and passing ratio by sieve 0. 075 mm be above 8% . This paper also suggests increasing content of fine aggregate in gradation and reduce coarse aggregate and this may effectively upgrade pavement performance of asphalt pavement in severe cold area and prolong service life of pavement.