Triaxial shear behavior of a cement-treated sandegravel mixture

A number of parameters, e.g. cement content, cement type, relative density, and grain size distribution,can influence the mechanical behaviors of cemented soils. In the present study, a series of conventionaltriaxial compression tests were conducted on a cemented poorly graded sandegravel mixture containing30% gravel and 70% sand in both consolidated drained and undrained conditions. Portland cement usedas the cementing agent was added to the soil at 0%, 1%, 2%, and 3% （dry weight） of sandegravel mixture.Samples were prepared at 70% relative density and tested at confining pressures of 50 kPa, 100 kPa, and150 kPa. Comparison of the results with other studies on well graded gravely sands indicated moredilation or negative pore pressure in poorly graded samples. Undrained failure envelopes determinedusing zero Skempton抯 pore pressure coefficient 餉 ？0？criterion were consistent with the drained ones.Energy absorption potential was higher in drained condition than undrained condition, suggesting thatmore energy was required to induce deformation in cemented soil under drained state. Energy absorptionincreased with increase in cement content under both drained and undrained conditions.
2014 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting byElsevier B.V. All rights reserved.

Triaxial shear behavior of a cement-treated sand–gravel mixture