Pait, Wahyuni Necitas (2023) Pengaruh Distribusi Serat Polimer terhadap Kuat Lentur Balok Beton Berserat. Undergraduate thesis, Fakultas Teknik Universitas Merdeka Malang.

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Abstract

Making fibrous concrete beams is useful for overcoming the problem of concrete being unable to withstand tensile strength (flexural strength). Research on fibrous concrete beams using polyethylene polymer gauze fibers. The aim of this study was to determine the effect of polymer fiber distribution on the flexural strength of fibrous concrete beams. The research was a test of 15 beams measuring 15 × 15 × 70 cm. The size of the polymer fiber is 15 × 5 mm with a constant fiber content of 1.5% by weight of cement. The quality of the planned concrete is f'c 30 MPa. Variation of fiber distribution was carried out based on beam height (Hb). At a height of 1⁄4 Hb, 1⁄2 Hb, 3⁄4 Hb, and Hb. Flexural strength testing was carried out at the age of 28 days, using a Hydraulic Concrete Beam Testing tool with a capacity of 100 kN. The test is based on the ASTM C-78/C78M standard concerning the standard test method for flexural strength of concrete (using simple beam with third-point loading). The test results for the flexural strength of fiberless concrete beams and the distribution of polymer fibers 1⁄4 Hb, 1/2 Hb, 3/4 Hb, and Hb are 4.56 Mpa, 4.86 Mpa, 5.16 Mpa, 4.77 Mpa, and 5.04. Distribution of polymer fiber 1⁄2 Hb is the best flexural strength compared to 1⁄4 Hb, 3⁄4 Hb and Hb. With an increase of 12.99% from fiber-free concrete beam.

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