水泥稳定碎石抗离析评价方法研究  

Segregation Resistance Evaluation Method of Cement Stabilized Macadam

作　　者：王明军 翟新明 邸文锦 翟健梁 关博文[2] 熊锐[2] WANG Mingjun;ZHAI Xinming;DI Wenjin;ZHAI Jianliang;GUAN Bowen;XIONG Rui(Qinghai Guoluo Highway Engineering Construction Co.,Ltd.,Xining,810021,China;School of Materials Science and Engineering,Chang’an University,Xi’an 710061,China)

机构地区：[1]青海省果洛公路工程建设有限公司,西宁810021 [2]长安大学材料科学与工程学院,西安710061

出　　处：《硅酸盐通报》2023年第7期2645-2655,共11页Bulletin of the Chinese Ceramic Society

基　　金：青海省重点研发与转化计划(2023-SF-124);中国博士后基金(2019M653520)。

摘　　要：针对现有的水泥稳定碎石离析评价方法难以精准评价混合料离析的情况,本文通过室内离析试验定量分析5种不同级配水泥稳定碎石混合料的抗离析性能,并引入形状离析系数L与筛分离析系数Seg,定量划分水泥稳定碎石混合料的离析程度。结果表明:与水泥剂量4%(均为质量分数)相比,水泥剂量5%的混合料抗离析性能大幅度提升,且水泥剂量5%和水泥剂量6%的混合料抗离析能力相差不大,因此更推荐5%的水泥剂量;当混合料的4.75 mm通过率为35%和40%时,混合料内部能形成强有力的力链结构,抵抗集料在下落过程中的离散趋势,且水泥剂量为5%和6%混合料的离析等级总保持在无离析和轻微离析状态,表现出优异的水泥稳定碎石抗离析性能。In view of the difficulty of segregation evaluation methods of the existing cement stabilized macadam to accurately evaluate the situation of mixture segregation,the segregation resistance of five kinds of cement stabilized macadam mixture with different levels was quantitatively analyzed by indoor segregation test,and the shape segregation coefficient L and sieve segregation coefficient Seg were introduced to quantitatively classify the segregation degree of cement stabilized macadam mixture.The results show that compared to 4%(all are mass fraction)cement content,the segregation resistance of mixture with 5%cement content is significantly improved,and the segregation resistance of mixture with 5%and 6%cement content is not significantly different.Therefore,5%cement content is more recommended.When the 4.75 mm pass percentage of mixture is 35%and 40%,a strong force chain structure is formed inside the mixture to resist the discrete trend of aggregate in the falling process,and the segregation grade of the mixture with 5%and 6%cement content remains in a state of no unsegregation and minor segregation,which demonstrates excellent segregation resistance of cement stabilized macadam.

关 键 词：水泥稳定碎石 室内离析试验 抗离析性能 形状离析系数 筛分离析系数 离析等级 

分 类 号：U414[交通运输工程—道路与铁道工程]