| Summary: | 碩士 === 大漢技術學院 === 土木工程與環境資源管理研究所 === 102 === ABSTRACT
To achieve sustainable development, nations are actively transforming industrial waste into resources. In Taiwan, copious quantities of marble waste are produced annually. Recycling this waste into usable resources would reduce the amount of refuse and advance the goal of sustainable development. Accordingly, in this study, we explored the use of marble waste sludge in controlled low-strength material (CLSM) by replacing the fine aggregates in CLSM with an equal weight of marble waste. The pipe flow, chloride ion content, and compressive strength of nine CLSM mixtures were tested to examine the influence of marble waste sludge on CLSM characteristics.
The results show that when 30%~90% (by weight) of the fine aggregates in CLSM were replaced with marble waste sludge, the CLSM pipe flow ranged between 20 cm and 22 cm, which complies with construction standards in Taiwan. Increasing the proportion of marble waste sludge decreased CLSM compressive strength. When 90% of fine aggregates were replaced with marble waste, the compressive strengths on Days 1 and 28 were 12 kgf/cm2 and 82 kgf/cm2, respectively, which conform to required specifications. However, the final setting time spans as much as 15 hours, which would require attention in practical applications. The chloride-ion content of CLSM substantially increased when cement accelerators were used; thus, the amount of cement accelerator used should not exceed 4% of cement weight. High proportions of marble waste resulted in decreased chloride-ion content in CLSM, but the amount of binder and coarse aggregates had limited effect on chloride-ion content.
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