Aggregates, Fibers and Coupling Agent in Polyester PCby C. Vipulanandan, Univ of Houston, United States,
S. Mebarkia, Univ of Houston, United States,
Abstract: This study investigated the influence of fine aggregate, glass fiber and silane coupling agent on the mechanical and mode I fracture behavior of a polyester polymer concrete (PC). The polymer content was varied between 10% and 18% of the total weight of the composite. Two aggregate systems, blasting sand and crushed sand, with particle sizes in the range of 5 mm to 0.1 mm were included in this study. The glass fiber content was varied up to 6% by weight. The silane was incorporated into the polymer concrete with blasting sand by pretreating the aggregates and fibers. The mechanical and fracture properties of the PC systems were studied at room temperature. The flexural strength and critical stress intensity factor (KIC) of polymer concrete with blasting sand increased with increase in polymer content. Using silane treatment blasting sand resulted in increased flexural strength but a reduction in KIC. The 18% PC with crushed sand had the highest strength and modulus but lowest KIC. Addition of glass fibers enhances the strength and toughness of the PC and silane treatment of glass fibers helps to further enhance these properties.
Subject Headings: Flexural strength | Soil strength | Aggregates | Glass | Fiber reinforced polymer | Blasting effects
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