Experimental Analysis on Shear Strength Characteristics of Sand-Gravel Mixtures
XUE Yadong,LIU Zhongqiang and HUANG Hongwei
DOI:10.3969/j.issn.1674-4764.2012.06.013
Received ,Revised , Accepted , Available online July 01, 2015
Volume ,2012,Pages 75-79
- Abstract
The effect of gravel content and shape on shear strength of sand-gravel mixtures was investigated through a series of direct shear tests under different stress states (σ = 50,100,150 and 200 kPa) in laboratory. Mixtures were made up of sand with rounded and angular gravels, respectively. The gavel contents of 20%, 40%, 60% and 80% were used in sample preparation. The results indicate that the dilatancy and shear strength of sand-gravel mixture increase with increasing gravel content and irregular degree of gravel shape. The gravel content has a more visible effect on the shear strength rather than that of the gavel shape. The minimum void ratio of the mixture is a characteristic parameter to investigate the relationship between gravel content & shape and the shear strength of sand-gravel mixture.