有机质含量对水泥土强度影响的室内定量研究

Laboratory study quantitatively on effect of organic content on strength of cement-mixed clays

采用对盐城泻湖相软土掺入不同含量的有机质作为试料土,进行了大量的水泥加固室内试验。对试验结果进行了分析,提出了不同有机质含量软土水泥加固后的室内无侧限抗压强度的预测公式,同时建立了不同有机质含量的试料土经水泥加固后的室内强度比与有机质含量之间的定量关系,该定量关系式可以有效地对有机质含量在5.5%～17.5%的水泥加固后的无侧限抗压强度进行定量的预测。

A quantitative way to predict the unconfined compressive strength of cement-mixed clays with a given organic content is proposed. The Yancheng lagoonal soft clays were used as an original clay to form cement-mixed clays through mixing with powder cement or slurry cement and organic matters. A series of tests were performed on the cement-mixed clays with various organic contents. A quantitative relationship is proposed between the strength ratio of the strength with a given organic content of y to the experimental strength with an organic content of y＂ and the organic contents of y and y＇. The quantitative expression proposed can be effectively to predict quantitatively the effect of organic content on the unconfined compressive strength of cement-mixed clays within the organic contents of 5.5 %-17.5 %.