AN EXPERIMENTAL STUDY CONCERNING THE EFFECTS OF NON PLASTIC FINE AND PHYSICAL PARAMETERS ON THE LIQUEFACTION RESISTANCE

For sand mixed with non-plastic fine, the void ratio related to sand grains ( ) plays a more important role in comparison with the total void ratio, where soil liquefaction resistance will be improved due to increase in FC at the constant . In spite of this fact, the recent works indicate that is unable to show perfectly the role of the non-plastic fines that are in voids between sand grains. For this reason, an equivalent void ratio has been defined that takes into account the non-plastic fine participation ratio in the soil bearing skeleton. In the present work, the generality of the expression of is verified. For this, a set of static undrained triaxial tests were performed. The results of tests indicate that, the undrained behavior of a given sand mixed with different percentages of non-plastic fine can be described by . But if the grading curves of sand change, we can not find a logic retention between and undrained resistance of soil, unless the physical and mechanical characteristics of soil are well introduced in expression of .

کلیدواژه ها:

Liquefaction Resistance ، Silty Sand ، Equivalent Void Ratio ، Static Triaxial Test