Strength and stiffness of Hong Kong marine deposits mixed with cement

In this paper, test results of cement treated soft marine deposits (MD) from a Hong Kong coastal site are presented and analysed. The MD was mixed with Portland cement at different cement/soil ratio in dry mass and at different initial water content of the soil. Unconfined compression tests and consolidated undrained triaxial tests were conducted. Stress-strain-strength characteristics of the cement treated MD are investigated. Useful relationships are obtained for peak strength, residual strength, cohesion and friction angle and Young's modulus as related to cement/soil ratio and initial water content. The effectiveness of the cement treatment is investigated. Conclusions are drawn on (a) the specific application of the improvement of Hong Kong marine deposits using cement, (b) the general trends of the stress-strain-strength characteristics of cement treated soft soils and (c) the effectiveness of soil improvement using cement treatment. (A)