摘要
新型橡胶粉和抗车辙剂改性沥青混合料路面高低温性能稳定,为优化其级配设计并提高路用性能,采用均匀设计法和正交设计法分别确定粗细集料关键粒径的筛孔通过率,对试验数据进行回归分析,通过综合粗细集料级配优化结果确定混合料集料总体最优级配,并通过分析优化级配下的高低温性能指标验证级配的适用性.试验结果表明,混合料嵌挤形成最优骨架结构时,粗集料最大含量占65%;能显著影响混合料高低温性能的因素是粗集料4.75 mm筛孔通过率、2.36 mm细集料筛孔通过率及油石比;建议混合料关键粒径16~13.2、13.2~9.5、9.5~4.75、4.75~2.36、2.36~0.3、0.3~0.075 mm的筛孔通过率分别为95%、67%、32%、20%、13.5%、5%,并给出建议的油石比为4.7%,最后给出了优化级配范围.
New type of rubber powder and anti-rutting agent modified asphalt mixture pavement high and low temperature performance is stable;for optimizing the gradation design and raising the road performance, using the uniform design method and the orthogonal design method, respectively, to determine the thickness of aggregate key size screen hole pass rate, and regression analysis of experimental data, through the comprehensive weight aggregate gradation optimization results the overall optimal mixture aggregate gradation is determined;and through the analysis of optimized distribution of high and low temperature performance indicators, the applicability of the grading is verified. The test results show that the embedded squeeze to form the optimal mixture skeleton structure, content of coarse aggregate maximum is 65%;significantly influence factors of the high and low temperature performance of mixture is coarse aggregate screen hole pass rate of 4.75 mm, 2.36 mm pass rate and the ratio of fine aggregate sieve hole;key recommendations mixture size from 16 mm to 13.2 mm and 13.2 mm to 13.2 mm, 9.5 mm to 4.75 mm, 4.75 mm to 2.36 mm, 2.36 mm to 0.3 mm and 0.3 mm to 0.075 mm mesh passing rate are 95%, 67%, 32%, 67%, 13.5%, 5%;and the suggesting oil-stone ratio is 4.7%. Finally, the optimal gradation scope is also given.
作者
马峰
张耀
傅珍
冯乔
MA Feng;ZHANG Yao;FU Zhen;FENG Qiao(School of Highway, Changfan University, Xi'an 710064, China;School of Materials Science and Engineering, Chang'an University, Xi'an 710064, China)
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2019年第8期687-693,702,共8页
Engineering Journal of Wuhan University
基金
国家自然科学基金项目(编号:51108038,51408051)
陕西省科技项目(编号:2013kjxx-94)
关键词
沥青混合料
复合改性
均匀设计
正交设计
级配优化
asphalt mixture
composite modification
uniform design
orthogonal design
graded optimization
