| Summary: | 碩士 === 朝陽科技大學 === 營建工程系碩士班 === 90 === Fly ash and blast furnace slag are two industrial waste materials with pozzolan property, if there can be application to improve geotechnical properties of soils, it contributes to reduce environmental pollution problems. In this study, The Taichung lateritic is improved with slag cement and admixtures with fly ash or water glass. Besides, added admixtures to mix with saturation laterituc soil, to obtain an improved soil specimens with different cement ratio to simulate mixture pile in the place, to manufacture improved soil. Results of the study reveal that the pH value and unit weight of lateritic soil increase with the contain of slag cement and admixtures. Activity decrease with the contain of slag cement and admixtures. Unconfined compression strength and the E50 increase with the contain of slag cement and admixtures, and increase with curing time. The peak strain decrease with the contain of slag cement and admixtures and curing time. When only addition slag cement, which the optimized contain is 20% of dry laterite weight. The addition of 20% fly ash admixtures to the slag cement-laterite, which have good development of strength. The addition of 2%~6% water glass admixes to the slag cement-laterite, it is helpful to the short-term and long-term strength of the improved soil. The unconfined compression strength after curing 14 days can be increase to be 13.65 fold of original lateritic soil.
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