抄録
This paper aims to present a study of a shrinkage potential of cement and/or fly ash treated soft clay. The soft clay specimens used in this study were prepared from reconstituted Bangkok clay. The soil-cement mix specimens were prepared with cement/clay-water ratio (C/wc) of 0.2, 0.3 and 0.4 and the liquidity index (LI) of 1.0, 1.3 and 1.6. The fly ashes as wastes from the electricity generating industries were used in this study. The replacement ratios of fly ash to cement were varied from 15 to 60% by weight. The experiments were performed to determine the strength, stiffness and shrinkage potential. The strength and stiffness were determined by the unconfined compressive strength (UCS) and the secant Young’s modulus at 50% of strength (E50). The shrinkage potential was loosely defined based on an image processing technique. Finally, the results of the study could be used to draw a conclusion of optimised fly ash and cement contents for the soft soil improvement.
