摘要
在粘性土中,液限或塑限都和塑性指数呈较好的线性关系,这符合土质学原理。但是当IP<10以后,这种线性关系消失了。随着塑性指数的减小,塑限不仅没有减小,反而逐渐增大,液限的变化也有类似的情况,出现了塑限反常现象。从假塑性现象、液塑限试验方法、粒径组成及矿物成分和交换离子成分等几方面分析液塑限反常现象的原因,从而进一步探讨粉土的定名方法。
Based on the theory of rock and soil engineering, there is a good linear relationship between liquid limit or plastic limit and plasticity index in the clay. But when I_p 〈 10, with the decrease of plasticity index, the liquid limit and the plastic limit increase abnormally. The causes of the abnormal phenomenon for the liquidplastic limit are analyzed with regard to the pseudoplastic phenomena, the test process of liquid limit and the plastic limit water content, the grain-size distribution, the compositions of mineral and the ion exchange, and accordingly, the naming method of silt is further discussed.
关键词
低液限粉土
液塑限
土工试验
塑性指数
假塑性现象
low liquid limit silt
liquid-plastic limit
soil test
plasticity index
pseudoplastic phenomena
