Measurement of the pore pressure parameter C less than unity in saturated sands
Date of Original Version
Two saturated sands, Monterey No. 030 and Enewetak coral, tested undrained under one-dimensional strain loading, were found to have values of the pore pressure parameter C, less than unity. The C parameter for Monterey No. 0/30 sand, determined to be unity at an effective consolidation stress of 86 kPa, decreased with increasing effective consolidation stress and increasing relative density. A similar behavior was observed for the Enewetak coral sand. These trends are similar to those reported by other researchers for the pore pressure parameter B. The decrease in C parameter values for saturated specimens appears to be direct result of increasing skeleton stiffness due to increases in effective stress and density. A theoretical analysis of skeleton stiffness based on porosity and pore pressure response predicts similar trends.
Geotechnical Testing Journal
Veyera, George E., Wayne A. Charlie, Donald O. Doehring, and Marinne E. Hubert. "Measurement of the pore pressure parameter C less than unity in saturated sands." Geotechnical Testing Journal 15, 3 (1992): 223-230. doi:10.1520/gtj10017j.