红黏土吸水增重及其对崩解试验的影响  

Water Absorption of Red Clay and its Influence on the Slaking Test

作　　者：张炳晖[1] 谢艳华 刘磊 刘宝臣[1] 曾庆建 肖适德 ZHANG Binghui;XIE Yanhua;LIU Lei;LIU Baochen;ZENG Qingjian;XIAO Shide(College of Civil Engineering and Architecture,Guilin University of Technology,Guilin 541004;Guilin University of Aerospace Technology,Guilin 541004;Guangxi Polytechnic of Construction,Nanning 53000;China Railway 24th Bureau Group Co.Ltd.,Shanghai 200071)

机构地区：[1]桂林理工大学土木与建筑工程学院,广西桂林541004 [2]桂林航天工业学院,广西桂林541004 [3]广西建设职业技术学院,南宁530007 [4]中铁二十四局集团有限公司,上海200071

出　　处：《土工基础》2020年第6期732-735,共4页Soil Engineering and Foundation

基　　金：国家自然科学基金(11562007);桂科能基金(16-J-21-6)。

摘　　要：红黏土湿化崩解过程中存在吸水增重现象,这会影响土体崩解量的测量及计算。为研究红黏土的吸水增重作用,在不同水温下对不同含水率红黏土试样进行吸水试验。试验结果表明,吸水作用会影响崩解量的测量结果,低含水率的试样会出现"负崩解量",使测量得到的崩解平均速率相对实际情况偏低。吸水速率及总吸水量与水温呈正相关、与土体含水率呈负相关;当试样的含水率达到18%时,吸水作用对于红黏土崩解的影响基本消失。During the red clay slaking,the weight increase during the water absorption will affect the accurate measurement the soil slaking property.In order to study the effect of water absorption and weight increase on the slaking of the red clay,water absorption tests were conducted under different water temperatures.The experimental results show that the water absorption will affect the slaking measurement results,and the samples with low water content will have negative slaking.The water absorption will result in a low average slaking rate.The water absorption of the red clay sample is affected by the moisture content of the soil and the water temperature.The water absorption rate and the total water absorption increase with the increase of temperature;The water absorption rate and the total water absorption increase with the decrease of soil moisture content;When the moisture content of the sample reaches 18%,the influence of water absorption on the slaking of the red clay could not be measured.

关 键 词：红黏土 吸水作用 崩解量 

分 类 号：TU411[建筑科学—岩土工程]