Proceedings of the Deep Mixing 2015 Conference, (DFI)
Soil Cement Tensile Strength and Modulus as a Function of Unconfined Compressive Strength
Dominic Parmantier, P.E., Condon-Johnson & Associates, Inc., United States; Jason Page, P.E., Southwest Contracting Ltd., Canada
In the past, the designers of DSM have analyzed various failure modes and then specified a minimum unconfined compressive strength (UCS) for the soil-cement. The specified minimum UCS reflected the compressive stress in the soil-cement under design loads and an appropriate factor of safety. With the increased use of finite element analysis for the design of DSM applications where allowable strain as well as stress are considered, there is a growing trend for designers to specify a modulus and occasionally a tensile strength for the soil-cement in addition to the UCS. This paper compares the relationship of modulus and tensile strength to UCS for soil-cement from a recent DSM project with unique testing requirements. These results are compared to published data. The case is made that designers should utilize published relationships to characterize the required strength and stiffness by a single acceptance criterion: UCS.
|article #2106; publication #1013 (DM-2015)|