A laboratory experimental study was carried out on two Indian fly ashes to investigate their compressive strength and flexural behaviors as cement-stabilized and fiber-reinforced base course materials. The cement content was chosen to comply with the criteria specified by the Electric Power Research Institute. The fiber reinforcement was in the form of randomly oriented polymeric fibers. Unconfined compression tests and flexure tests were conducted on specimens stabilized with cement alone and with both cement and fibers. The experimental program included the determination of the chemical composition of the raw fly ashes, and scanning electron microscopy and x-ray diffraction tests of the raw and stabilized fly ashes. The study showed that, in general, the fiber inclusions improved the performance of the cement-stabilized fly ash specimens.
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