Pore water density in a saturated bentonite

This paper reports the average pore water density (rho(wp)) measured on a Japanese bentonite, which was compacted to a dry density (rho(d)) range from 0 center dot 3 to 1 center dot 8 Mg/m(3) and saturated under a water pressure of 2 center dot 7 MPa. It was found that rho(wp) monotonically increased from similar to 1 center dot 0 Mg/m(3) at rho(d) of 0 center dot 3 Mg/m(3) to similar to 1 center dot 23 Mg/m(3) at rho(d) of 1 center dot 8 Mg/m(3). A review of the available literature revealed that the methodology of accurately measuring rho(wp) in a full range of water content (w) is not available. An upper boundary of rho(wp) for montmorillonite was drawn, and proportions of water at different swelling states were estimated.