| Summary: | 博士 === 國立成功大學 === 資源工程學系碩博士班 === 101 === The waste tires can be added to concrete to form a composite material, known as “Rubcrete”. However, addition of rubber crumbs leads to degradation in the physical properties of the concrete. In this study, by treating the tire crumbs with Polyacrylamide (PAM) and Polyvinylalcohol (PVA), we have improved the properties of the rubberized mortar, “Rubcrete”. Specifically, the compressive and flexural strengths of the specimen at 56 days were improved up to 14~20% and 18~27%, respectively. The anti-corrosion property of this new rubberized mortar was dramatically superior to that of the original mortar, and the test cycles were increased from 1 to 5 in the anti-corrosion test. The addition of rubber also turned the crack from fragility crack to ductility crack. To examine the impacts of PAM and PVA modification on the microscopic level, the specimens with and without PAM and PVA modification, were observed with SEM. Experimental results showed that PAM and PVA treatment of rubber crumbs is an effective means to improve the mechanical properties of the rubberized mortar and lends itself to possible commercial applications.
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