膨胀剂对水泥稳定碎石干缩性能的影响  

Influence of Expansion Agent on the Dry Shrinkage Performance of Cement-stabilized Macadam

作　　者：范安俊[1] 黄晓明[1] 赵永利[1] 

机构地区：[1]东南大学交通学院,江苏南京210096

出　　处：《公路工程》2009年第6期26-29,共4页Highway Engineering

基　　金：交通部西部交通建设科技资助项目(200631800099.1)

摘　　要：为减小水泥稳定碎石基层材料收缩变形量,增强其抗裂能力,提出采用向水泥稳定碎石材料中掺加适量膨胀剂,通过膨胀剂的微膨胀来减小材料的收缩变形。试验结果表明,通过添加膨胀剂可以在养生期内使试件出现膨胀变形,从而有效的补偿试件在干燥环境中的收缩变形;当掺加的膨胀剂剂量适当时,混合料在干燥环境和潮湿环境中变形量都较小,具有很好的体积稳定性和抗折强度。In order to decrease the shrinkage of cement-stabilized macadam, it is proposed that appropriate expansion agent was added to cement - stabilized aggregate, its close-grained degree could be improved and its shrinkage could be decreased when the micro-expansion of expansion agent came into being. Test result show that adding expansion agent can make specimens expand during curing period, which compensates the dry shrinkage deformation effectively in dry environment; when appropriate expansion agent is added to cement stabilized macadam, the deformation of mixture in dry and humid environment is small, and the mixture characterizes with very good dimensional stability and bending strength.

关 键 词：水泥稳定碎石 膨胀剂 干缩 

分 类 号：U416.21[交通运输工程—道路与铁道工程]