粉煤灰改良Q3黄土填料变形特性试验研究  

Experimental Research on the Deformation Property of Q3 Loess Filler Improved by Fly Ash

作　　者：杨晓松[1] 党进谦[2] 杨瑶[1] 徐镕 杨保存[1] Yang Xiaosong;Dang Jinqian;Yang Yao;Xu Rong;Yang;Baocun(College of Water Conservancy and Construction Engineering, Tarim University, Alar, Xinjiang 843300;College of Water Conservancy and Construction Engineering,Northwest A j F University, Yangling, Shannxi 712100)

机构地区：[1]塔里木大学水利与建筑工程学院,新疆阿拉尔843300 [2]西北农林科技大学水利与建筑工程学院,陕西杨凌712100

出　　处：《塔里木大学学报》2018年第1期118-123,共6页Journal of Tarim University

基　　金：国家自然科学基金项目(51641903;51168042;51668055);塔里木大学校长基金项目(TDZKQNZD201505;TDZKQN201511)

摘　　要：为研究粉煤灰改良Q3黄土填料变形特性的效果,进行了不同粉煤灰掺量和养护龄期条件下改良Q3黄土填料的室内压缩与湿陷变形试验。试验结果表明:适量添加粉煤灰能够很好的改良Q3黄土填料的变形特性;粉煤灰改良Q3黄土填料的压缩系数随着粉煤灰掺量和养护龄期的增加而逐渐减小;粉煤灰掺量小于15%时,湿陷系数随着粉煤灰掺量的增加而减小;粉煤灰掺量大于15%时,湿陷系数随着粉煤灰掺量的增加而增加;15%粉煤灰掺量改良Q3黄土填料的湿陷系数随着养护龄期的延长而逐渐减小。试验条件下,粉煤灰改良Q3黄土填料的最优掺量为15%。To investigate on the effect of Q3 loess filler＇s deformation properties improved by fly ash,indoor compression and collapsibility tests are carried out on Q3 loess filler improved by fly ash. The tests consider different fly ash content and curing period. Experimental results indicate that Q3 loess filler＇s deformation properties can be improved well by adding a proper amount of fly ash. The Q3 loess filler＇s coefficients of compressibility improved by fly ash decrease with the increase of fly ash content and curing period. The coefficients of collapsibility decrease with the fly ash content＇s increase when the fly ash content is less than 15% and increase with the fly ash content＇s increase when the fly ash content is more than 15%. In addition,the coefficients of collapsibility decrease with the extending of curing period when the fly ash content is 15%. Under the test conditions,the optimum dosage of fly ash in Q3 loess filler is15%.

关 键 词：粉煤灰 黄土 掺量 龄期 压缩系数 湿陷系数 

分 类 号：TV3[水利工程—水工结构工程] TV6