Published Online: 3 January 2011
Page Count: 5
Geotechnical Engineer, Knight Piesold, Ltd., 1400-750 W. Pender, Vancouver, BC
Fannin, R. Jonathan
P.Eng.Professor of Civil Engineering, Dept. of Civil Engineering, Univ. of British Columbia, Vancouver, BC
(Received 7 July 2008; accepted 9 December 2010)
A new method is described for the reconstitution of cement-treated specimens of sand and silt for laboratory strength tests. Saturation of the slurry mix is attained through boiling the sand fraction at atmospheric pressure, boiling the silt fraction at a pressure that is reduced to a vacuum of 80 kPa, and mechanised blending of cement into the combined soil fractions in a rigid-walled former that is subjected to the same vacuum pressure. Reproducibility of the method is demonstrated from tests on four identical homogeneous specimens that yield a very narrow range in water content, bulk density, and unconfined compression strength. It is further evident in the trend of increasing strength with normalized cement content in those data.
Paper ID: GTJ102012