酸碱度值对土体液、塑限的影响  

EFFECTS OF PH VALUE ON LIQUID LIMIT AND PLASTIC LIMIT OF SOIL

作　　者：师林[1] 朱大勇[1] 陈龙飞[1] 

机构地区：[1]合肥工业大学土木与水利工程学院,合肥230009

出　　处：《工业建筑》2011年第7期70-73,共4页Industrial Construction

基　　金：国家自然科学基金面上项目(40772172);国家973计划项目(2008CB425801);国家"十一五"科技支撑计划项目专题(2006BAC04B05);安徽省人才开发基金(2008Z015)

摘　　要：采用室内浸泡方法,研究污染土的液、塑限以及塑性指数随酸碱度值的变化规律。用不同酸碱度值的盐酸和氢氧化钠溶液浸泡土样,测定浸泡前、后土样的液、塑限值,总结其变化规律。试验表明:随着酸碱度值的增大,液限和塑性指数逐渐增大而塑限呈现两端大中间小;在酸碱度值一定的情况下,随着浸泡时间的增长,土样有液限值逐渐减小、塑限值逐渐增大的趋势。最后,对上述变化的原因进行分析。By using the method of soaking in laboratory,the change laws between the liquid limit,plastic limit and plasticity index of the polluted soil and the pH value were studied.The values of the liquid limit and plastic limit of the soil samples were measured before and after soaking in the hydrochloric acid and sodium hydroxide solution with respective pH value.Then,the change laws indicate that,with the pH value increasing,the liquid limit and the plasticity index increase while the plastic limit presents that both ends are big and the middle is small;when fixing the pH value,the liquid limit is increasing proportional to the time of soaking,while the plastic limit is diminishing.Finally,the reasons causing these change laws were analyzed.

关 键 词：污染土 酸碱度值 液限 塑限 塑性指数 

分 类 号：TU411[建筑科学—岩土工程]