Study on Performance of Low Liquid Limit Silt Stabilized by Lime and Fly-ash

Aiming to the poor stability of low liquid limit silt caused by small pore, poor permeability, adverse structure, tests were carried out in laboratory to get the basic physical and technical parameters of low liquid limit silt. The stability of low liquid limit silt were studied by indoors tests, such as unconfined compression strength test, splitting strength test, compression rebound modulus test, etc. to get best stability and consolidated scheme of low liquid limit silt. The consolidated principles and influencing factors on the stability were analyzed from the view of physical and chemical. The test results indicate that unconfined compression strength of samples increase with the increase of lime and fly-ash. The stability and best consolidated scheme are influenced by fraction content, soil particle grading, plasticity index and so on. The stabilization of low liquid limit silt consolidated by lime and fly-ash are affected obviously by clay content and plasticity index. The stabilization effect is better for low liquid limit silt with big clay content and small plasticity index.