摘要
为了探讨多功能高模量改性沥青混合料的最佳级配范围,通过集料压碎值试验和混合料试验分析粗细集料骨架和填充作用,在其基础上合成5种不同级配和不同细集料含量的混合料,以路用性能为检验评价指标,对多功能高模量改性沥青混合料粗细集料的最佳含量开展试验研究。结果表明:0.6~2.36mm细集料在混合料中起到受力和填充作用,使用多功能高模量改性沥青,可有效提升沥青胶浆内黏聚力、刚度和软化点,进而增强混合料整体路用性能。当0.6~2.36mm的细集料含量占30%~60%,0.6mm以下填料含量占20%~30%,2.36mm以上粗集料含量占20%~40%,多功能高模量改性沥青混合料的动稳定度达到1万(次/mm)以上、冻融劈裂强度比达到88%以上,表现出较好的高温稳定性和水稳定性。
In order to explore the optimal grading range of multi-functional high modulus modified asphalt mix⁃ture,the aggregate crushing value test and mixture test were conducted to analyze the skeleton and filling effect of coarse and fine aggregates.Based on this,five different gradations and different fine aggregate contents of the mix⁃ture were synthesized.Using road performance as the inspection and evaluation index,experimental research was conducted on the optimal content of coarse and fine aggregates in multi-functional high modulus modified asphalt mixture.The results indicate that the fine aggregate of 0.6~2.36mm plays a role in bearing and filling the mix⁃ture.The use of multifunctional high modulus modified asphalt can effectively enhance the cohesion,stiffness,and softening point of asphalt slurry,thereby enhancing the overall road performance of the mixture.When the fine ag⁃gregate content of 0.6~2.36mm accounts for 30%~60%,the filler content below 0.6mm accounts for 20%~30%,and the coarse aggregate content above 2.36mm accounts for 20%~40%,the dynamic stability of multi-functional high modulus modified asphalt mixture reaches over 10000 times/mm,and the freeze-thaw splitting strength ratio reaches over 88%,exhibiting good high-temperature stability and water stability.
作者
徐峰
陈亚雄
XU Feng;CHEN Ya-xiong(Jiaxing Yonghong Construction Engineering Co.,Ltd.,Jiaxing 314003,China;Zhejiang Zhixin Testing Technology Co.,Ltd.,Jiaxing 314003,China)
出处
《浙江交通职业技术学院学报》
CAS
2023年第4期19-23,共5页
Journal of Zhejiang Institute of Communications
关键词
多功能改性剂
高模量沥青混合料
骨架与填充作用
级配设计
高温稳定性
水稳定性
multifunctional modifier
high modulus asphalt mixture
skeleton and filling effect
gradation design
high temperature stability
water stability
