| Summary: | 碩士 === 國立中山大學 === 海洋環境及工程學系研究所 === 103 === General cementitious repair materials will added the epoxy or acrylic resin to increase material cohesiveness. And added aluminum powder or iron powder as a bulking agent of slurry (or add a commercially available expansion agent) to reduce the amount of shrinkage. In this study, we hopes to replace the use of silica fume to increase cohesiveness and using the expanding features of basic oxygen furnace slag to make the slurry reaches zero shrinkage or micro-expansion goals.
The results from the study found that silica fume can effectively enhance bond strength, although it will make the workability of the slurry lower, but by the use of water-reducing agent can improve this problem. Comparing with commercially available expansion agent and basic oxygen furnace slag of the experiment results, basic oxygen furnace slag has lower expantion rate, about 21 days only significant change, but expansion agent has significant expansion in 14 days or so. At about 28 days, expansion agent can reach the goal of micro-expantion, but basic oxygen furnace slag just only near the zero shrinkage. But on the strength of performance, basic oxygen furnace slag are more outperformed than expansion agent on compressive strength and bond strength .
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