This study was conducted to determine some physical and mechanical properties of high-strength flowable mortar reinforced with\r\ndifferent percentages of palm fiber (0, 0.2, 0.4, 0.6, 0.8, 1.0, 1.2, 1.4, and 1.6% as volumetric fractions). The density, compressive\r\nstrength, flexural strength, and toughness index were tested to determine the mechanical properties of this mortar. Test results\r\nillustrate that the inclusion of this fiber reduces the density of mortar. The use of 0.6% of palm fiber increases the compressive\r\nstrength and flexural strength by about 15.1%, and 16%, respectively; besides, the toughness index (I5) of the high-strength\r\nflowable mortar has been significantly enhanced by the use of 1% and more of palm fiber.
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