Abstract
The influence of fiber length on tension and flexural behavior of extruded and cast cement composites was examined for PVA(hydrophilic) fibers and polypropylene (hydrophobic) fibers. The fiber matrix interface, fiber surface, and microstructure of the composite cross-section were characterized by SEM. Opposite trends were obtained for the cast and extruded composites with increasing fiber length. For the extruded composites, decreasing fiber length increased flexural and tensile response, whereas for the cast composites increasing the fiber length increased the flexural and tensile response. The differences were found to be a result of differences in fiber matrix bond properties and fiber distribution. The extended composites showed a stronger fiber matrix bond compared to the cast composites.
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