摘要
通过对水泥稳定类与石灰粉煤灰稳定类路面基层材料掺入不同比例的钢渣集料以进行室内干缩和温缩试验,研究了钢渣对无机结合料稳定基层材料抗裂性能的影响。集料的钢渣-碎石比为0∶100、25∶75、50∶50、75∶25、100∶0。研究结果表明,掺入钢渣使水泥稳定类材料压实所需最佳含水率上升,但对二灰稳定类影响不显著。随着钢渣在集料中比例由0增至100%,水泥稳定类和二灰稳定类材料的总干缩系数分别最多减少40.0%与32.2%,掺入钢渣可提高材料的抗干缩性能。另一方面,随着钢渣在集料中比例由0增至100%,水泥稳定类和二灰稳定类材料的平均温缩系数分别最多增加23.6%与32.3%,掺钢渣的基层材料施工时应注意控制温差,避免温缩开裂。
Experiment of dry shrinkage and temperature shrinkage is conducted on cement stabilized pavement base material and lime-fly ash stabilized pavement material, using aggregate of different crushed stone-steel slag proportion, to study resistance of material to cracking. Crushed stone-steel slag ratios discussed in this paper are 0： 100, 25 ： 75, 50 ：50, 75 ： 25, and 100 ： 0. Results indicate that compaction needed optimal water content rises by steel slag addition significantly, but the same effect is not found in lime-fly ash stabilized material. With ration of steel slag in aggregate rises from 0% to 100%, total dry shrinkage coefficient of cement stabilized material and lime-fly ash stabilized material decreases 40.0% and 32.2% at most. Steel slag addition in aggregate increases resistance of material to water loss cracking. To another aspect, with ration of steel slag in aggregate rises from 0% to 100%, average temperature shrin kage coefficient of cement stabilized material and lime-fly ash stabilized material rises 23.6% and 32.3% at most.Temperature range in construction site should be paid attention to restrict, for prevention of temperature shrinkage induced cracking.
出处
《公路》
北大核心
2012年第12期186-191,共6页
Highway
基金
湖南省交通运输厅2009年度科技进步与创新项目
项目编号200914
长湘高速公路资源节约型和环境友好型科技示范工程项目
项目编号CXKJSF0202
关键词
路面基层
无机结合料
钢渣
干缩
温缩
pavement base
inorganic binder
steel slag
dry shrinkage
temperature shrinkage
