Laboratory Procedures for Determining the Dispersibility of Clayey Soils,

摘要

In recent years,it has become widely recognized among soils engineers that erodible clays,or dispersive clays as they have come to be known,can cause serious problems when unwittingly used as material in earth structures. The established lack of reliability in the use of conventional index tests for laboratory identification of dispersive clays has led to the development of new tests. This report describes test procedures for four tests:namely,the pinhole test,chemical analyses,the double hydrometer test,and the crumb test,all of which are now used in testing programs to design structures for locations where clay erosion may occur.