红河蒙自改良中膨胀土的路用特性试验研究  

Experimental Study on Road Use Characteristics of Expansive Soil in Honghe Mengzi Improvement

作　　者：李艳林 巫益 许汉华 方芳 Li Yanlin;Wu Yi;Xu Hanhua;Fang Fang(Kunming Prospecting Design Institute of China Nonferrous Metals Industry Co.Ltd.,Kunming,Yunnan 650051;Yunnan Key Laboratory of Geotechnical Engineering and Geohazards,Kunming,Yunnan 650051;Kunming Survey Institute Technology Development Co.Ltd.,Kunming,Yunnan 650051)

机构地区：[1]中国有色金属工业昆明勘察设计研究院有限公司,云南昆明650051 [2]云南省岩土工程与地质灾害重点实验室,云南昆明650051 [3]昆明勘察院科技开发有限公司,云南昆明650051

出　　处：《江西建材》2023年第12期47-49,52,共4页Jiangxi Building Materials

摘　　要：文中以红河蒙自市某工程膨胀土为研究对象,对其进行了素土,石灰、粉煤灰以及水泥改良膨胀土的路用特性试验研究。结果表明,石灰、粉煤灰、水泥三种改良膨胀土的最大干密度均随着掺量的增加而逐渐减小,石灰和水泥改良的膨胀土最佳含水率随着掺量增加而增大,粉煤灰改良的膨胀土最佳含水率则随着掺量增加而减小。三种改良膨胀土的膨胀量均随掺入比的增大而减小,CBR值则与之相反。从改良后减小的膨胀量来看,改良效果由好到差依次是粉煤灰、石灰、水泥;从提高CBR值上看,水泥效果更好,其次是石灰,粉煤灰效果最差。In this paper,the expansive soil of a project in Mengzi City,Honghe was taken as the research object,and the road characteristics of plain soil,lime,fly ash and cement improved expansive soil were studied.The results show that the maximum dry density of lime,fly ash and cement improved expansive soil gradually decreases with the increase of content,the optimal moisture content of lime and cement improved expansive soil increases with the increase of content,and the optimal moisture content of fly ash improved expansive soil decreases with the increase of content.The swelling amount of the three improved expansive soils decreased with the increase of the incorporation ratio,and the CBR value was the opposite.In terms of increasing the CBR value,cement has a better effect,followed by lime,and fly ash has the worsteffect.

关 键 词：膨胀土 最大干密度 最佳含水量 膨胀量 CBR值 

分 类 号：TU47[建筑科学—结构工程]