木质素磺酸钙改良紫色土力学性能试验研究  

Experimental Study on the Mechanical Properties of Calcium Lignosulfonate Modified Purple Soil

作　　者：向杨 鲍安红[1] 罗书伟[1] 薛乐 XIANG Yang;BAO Anhong;LUO Shuwei;XUE Le(College of Engineering and Technology,Southwest University,Chongqing 400716,China)

机构地区：[1]西南大学工程技术学院,重庆400716

出　　处：《人民黄河》2018年第12期106-109,共4页Yellow River

摘　　要：针对紫色土抗侵蚀性差、遇水容易崩解破坏造成严重水土流失等问题,采用木质素磺酸钙对重庆市紫色土进行改良。通过直剪试验、无侧限抗压强度试验、湿化崩解试验对改良土进行研究,结果表明:木质素磺酸钙能够改善紫色土力学性能,随着掺量的增加,改良土抗剪强度、无侧限抗压强度均呈现先增大后减小的趋势;木质素磺酸钙掺量为5.0%时,各项指标达到最优,崩解特性得到显著改善;当掺量超过5.0%时,改良土不崩解,因此建议木质素磺酸钙掺量为5.0%。Be directed against the poor resistance to erosion of purple soil, and problems such as severe soil erosion caused by the easy disin-tegration and destruction of water, this study adopted calcium lignosulfonate to improve the purple soil in Chongqing. The improved soil wasstudied by direct shear test, non-lateral compressive strength test and wet disintegrating test. The results show that calcium lignosulfonate canimprove the mechanical properties of purple soil. With the increase of the dosage, the shear strength of the improved soil and the compressivestrength of the non-lateral limit show the tendency of increasing first and then decreasing. When the amount of calcium lignin sulfonate is5.0%, the indexes are optimal and the disintegrating characteristics are improved significantly. When the dosage exceeds 5.0%, the modifiedsoil does not disintegrate, so it is suggested that the calcium content of lignin sulfonate is 5.0%.

关 键 词：水土保持 紫色土 木质素磺酸钙 力学性能 

分 类 号：S157.2[农业科学—土壤学]