掺粉煤灰水泥稳定碎石收缩特性研究
Shrinkage Properties of Cement Stabilized Crushed Stones Mixed with Fly-Ash
徐鸥明 1王有贵 2陈俊宇 1牛冬瑜1
作者信息
- 1. 长安大学交通铺面材料教育部工程研究中心,陕西西安710061
- 2. 重庆市智翔铺道技术工程有限公司,重庆400046
- 折叠
摘要
为了评价粉煤灰对水泥稳定碎石收缩性能的影响,通过于缩试验和温缩试验,研究了水泥稳定碎石和不同粉煤灰掺量的水泥粉煤灰稳定碎石混合料收缩特性变化规律.结果表明:水泥粉煤灰稳定碎石与水泥稳定碎石混合料具有相似的干缩和温缩变化规律;粉煤灰掺量为5％ ～ 10％时,水泥粉煤灰稳定碎石的干缩和温缩得到明显改善,从而减小产生收缩裂缝的几率;粉煤灰掺量＞15％时,试件干缩和温缩均显著增大.建议粉煤灰最佳掺量为5％ ～10％.
Abstract
In order to assess the influence of fly-ash on the shrinkage performance of cement fly-ash stabilized aggregate,the variation rule of shrinkage property of cement stabilized aggregate and cement and fly-ash stabilized aggregate with different contents of fly-ash was researched by dry shrinkage test and temperature shrinkage test.The results show:there is similar change law for cement stabilized crushed-stones and cement fly-ash stabilized crushed-stones; the dry shrinkage and temperature shrinkage amount can be improved evidently when the cement stabilized crushed-stones is added by 5％ ～ 10％ fly-ash.Therefore,the risk of shrinkage cracking can be reduced obviously.The mixing amount of fly-ash should not exceed 15％ of the mixtures,otherwise the dry shrinkage and the temperature shrinkage amount will increase remarkably.On the base of the dry shrinkage and the temperature shrinkage amount,the optimal mixing amount of fly-ash should be 5％ ～ 10％.
关键词
道路工程/水泥稳定碎石/粉煤灰/干缩/温缩Key words
road engineering/cement stabilized aggregate/fly-ash/dry shrinkage/temperature shrinkage引用本文复制引用
基金项目
陕西省交通科技项目(07-16K)
中央高校基本科研业务费专项资金资助项目(CHD2009JC003)
出版年
2014
NETL
NSTL
维普
万方数据