二灰稳定碎石收缩特性  

Study on the shrinkage performance of lime-fly ash stabilized crushed stone

作　　者：刘亚敏[1] 韩森[1] 程贤鹏 闫亚鹏[1] 

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064 [2]武汉市政工程设计研究院有限责任公司,湖北武汉430023

出　　处：《广西大学学报（自然科学版）》2012年第1期124-127,共4页Journal of Guangxi University（Natural Science Edition）

基　　金：国家西部交通建设科技项目(200731822301-8);陕西省交通建设集团科技项目(KY08-01)

摘　　要：为了深入研究各种因素对二灰稳定碎石混合料收缩特性的影响,对不同级配、不同二灰含量和不同龄期的二灰稳定碎石材料进行了温缩系数和干缩系数的测试,结果表明,具有骨架密实结构的二灰稳定碎石材料拥有较好的抗收缩特性;当级配一定时,混合料的温缩、干缩系数随着二灰含量的增大而增大;当二灰含量一定时,混合料的温缩系数随龄期的增加而不断增大;方差分析结果表明,对于温缩系数,龄期和二灰含量均为显著影响因素,且后者的影响更为显著;对于干缩系数,级配类型和二灰含量为显著影响因素,且前者的影响更为显著。In order to study the effect of several factors on the shrinkage performance of lime-fly ash stabilized crushed stone, temperature shrinkage coefficients and dry shrinkage coefficients of the mixtures with different gradations, lime and fly contents and ages were measured. The results indicate that the mixture with a stone-on-stone contact has a better shrinkage-resistance performance. For the same gradation, both dry shrinkage coefficient and temperature coefficient become improved with the increase of lime-fly content and when the lime-fly content is the same, temperature shrinkage coefficient increases with age. Results of analysis of variance show that for the temperature shrinkage coefficient, both the effect of age and lime and fly content are important, but the latter is more important than the former. For the dry shrinkage coefficient, both gradation and lime and fly content are important factors, but the former is more important than the latter.

关 键 词：道路工程 半刚性基层 二灰稳定碎石 干缩 温缩 

分 类 号：U416.2[交通运输工程—道路与铁道工程]