黄河冲(淤)积粉质二灰土的配合比研究  

Mixture ratio of Yellow River silty soil stabilized with lime-fly ash

作　　者：姚占勇[1] 艾贻中 商庆森[1] 李法增 杨光 

机构地区：[1]山东大学土建与水利学院,济南250061 [2]山东高速集团,济南250061

出　　处：《岩土力学》2008年第7期1943-1948,共6页Rock and Soil Mechanics

基　　金：山东省交通科技基金资助(No2002A107)

摘　　要：试验研究了黄河冲(淤)积粉质二灰土的配合比问题。分析了黄河冲(淤)积粉质二灰土的强度标准龄期;研究了土质、二灰比、二灰含量对二灰土强度的影响规律;提出了黄河冲(淤)积粉质二灰土配合比设计的新思路。研究认为,对于黄河冲(淤)积粉质二灰土,应以21d无侧限抗压强度作为配合比设计的依据;黄河冲(淤)积平原区土质适宜的二灰比为1:3,适宜的二灰含量在32%～40%之间;土中<0.005mm颗粒含量、土的有机质含量,以及二灰土的粗细颗粒比Cf值对黄河冲(淤)积粉质二灰土的强度具有重要影响,且呈现规律性变化;当土中<0.005mm颗粒含量在17%～27%之间时,黄河冲(淤)积粉质二灰土可获得较高的强度。Through the experiment, the mixture ratio of Yellow River alleviation （silting） soil stabilized by lime-fly ash is studied. The standard age of strength of Yellow River alleviation （silting） soil stabilized by lime-fly ash is analyzed. The influence law of soil and lime-fly ash ratio and content to the strength of lime-fly ash soil is studied; and the new idea about mix design of Yellow River alleviation （silting） soil stabilized by lime-fly ash is put forward. Research thought that the mix design should be based on the 21 d unconfined compression test of Yellow River alleviation （silting） soil stabilized by lime-fly ash, is put forward. The most suitable lime-fly ash ratio of Yellow River alluvial plain soil is 1 ： 3, and the most suitable lime-fly ash content is between 30 % and 40 %. The grain content of 〈0.005 rmn and organic matter content and thickness ratio can influence the strength of Yellow River alleviation （silting） soil stabilized by lime-fly ash obviously; and the interrelation among them is regular. When the grain content of 〈0.005 mm is between 17 % and 27 %, the Yellow River alleviation （silting） soil stabilized by lime-fly ash can obtain higher strength.

关 键 词：黄河 粉粒 二灰土 强度 

分 类 号：TU447[建筑科学—岩土工程]