Pratiwi, Alita Dyah Ayu (2023) Pengaruh Panjang Serat Polimer terhadap Kuat Lentur Balok Beton Berserat. Undergraduate thesis, Fakultas Teknik Universitas Merdeka Malang.

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Abstract

The beam is able to withstand compressive strength but is weak against bending strength. Additives for polymer fiber concrete mixtures can improve concrete's weakness in flexural tensile strength. This study used 0.5 cm wide polymer fibers with a fiber length variation of 1 cm; 1.5cm; 2cm; and 2.5 cm. The polymer fiber content was 1.5% of the cement weight, the fiber distribution was ½ Hb (height of the block), the water-cement factor was 0.48, and the test specimen was 15 x 15 x 70 cm. Tests were carried out on concrete aged 28 days with a Hydraulic Concrete Beam Testing Machine with a load capacity of 100 kN. Flexural strength test based on C78M regarding the standard test method for flexural strength of concrete (using simple beam with third-point loading). The addition of polymer fibers with variations in fiber length can increase the value of the flexural strength of the beam. The highest average flexural strength value of fiber concrete blocks is found in the fiber length variation of 2.5 cm, which is 5.19 MPa with a percentage increase of 13.64% compared to fiberless concrete blocks of 4.56 MPa.

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