Laboratory investigation on the compressibility of Singapore marine clays

Abstract

2The compressibility characteristics of Singapore marine clay in reconstituted and undisturbed states were studied using oedometer, constant rate of strain, Rowe cell and isotropic consolidation tests. The intrinsic compression curve of the reconstituted clay was found to be similar to that proposed by Burland (1990), with some minor deviations at low vertical stresses of less than 100 kPa. The field and laboratory compression behaviors were found to be similar, hence the laboratory curve could be used as a reference for interpreting the field behavior. Factors affecting the measurements of compression index and yield stress were discussed. As the coefficient of lateral earth pressure at the top upper clay was close to one, the compression curves of vertically and horizontally trimmed samples were almost similar. The yield stress was mainly controlled by the strain rate; i.e., the higher strain rate resulted in the higher yield stress. Constrained modulus as derived from cone penetration tests (CPT) and flat dilatometer tests (DMT) were also examined and compared with laboratory test results. The in-situ tests showed the decrease in constrained modulus with depth and generally DMT was found to register a higher modulus values.

The Effects of Hydroxypropyl Methyl Cellulose and Metakaolin on the Properties of Self-Compacting Solidified Soil Based on Abandoned Slurry

“…However, these marginal lands tend to nurture unique species, and research results from reference [ 8 ] indicate that species obtained from marginal lands have high potential as raw materials for the production of solid biofuels. Furthermore, the poor permeability of these engineering sludges renders them difficult to dewater and solidify naturally [ 9 ]. Consequently, the adoption of appropriate treatment methods is crucial not only for environmental protection but also for fostering the healthy and sustainable growth of the engineering industry [ 10 , 11 ].…”

Research-oriented ground investigation projects at Changi, Singapore

“…Details of consolidation tests on Singapore marine clay can be found in the study by Chu et al (2004). One-dimensional consolidation tests on Singapore marine clay were extensively discussed by Bo et al (1998cBo et al ( , 2001bBo et al ( , 2016.…”