Gladysita, Gladysita (2024) Pengaruh Laju Korosi Dan Lama Rendaman Baja Tulangan Yang Terkorosi Terhadap Kuat Momen Lentur Balok Beton Bertulang. Undergraduate thesis, Fakultas Teknik Sipil Universitas Merdeka Malang.

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Abstract

Reinforced concrete consists of concrete and reinforcing steel. Concrete has compressive strength and steel reinforcement has tensile strength. Corroded steel
reinforcement can because a decrease in the quality of the steel. The factors of corrosion are high concentrations of sodium chloride, electrolytes and soaking time. The research aims to determine the effect of corrosion rate and soaking time of corroded reinforcing steel on the bending moment strength of reinforced concrete beams.In this research, 12 reinforced concrete beams were made measuring 15 cm
x 15 cm x 65 cm with a total of 4ø8 flexural reinforcement and shear reinforcement at the supports ø6-50mm and the ground ø6-100mm. The blocks were soaked in a corrosive solvent (NaCL 3.5%) for 1, 3 and 5 days using the galvanostatic method. Bending moment strength testing based on ASTM C78/C78M using the Hydraulic Concrete Beam Testing Machine. Corrosion rate testing is based on ASTM G31-72 concerning Laboratory Corrosion Testing of Metals.
The highest result of the bending moment strength test was 4.58 KNm on aconcrete beam with 1 days soaking time and the lowest result was 4.10 KNm with a soaking time of 5 days. The highest corrosion rate test result was 10776,220 mpy
on the beam with a soaking time of 1 day and the lowest corrosion rate test result was 3208,263 mpy with a soaking time of 5 days. The longer soak beam is immersed
in the corrosive solution, the bending moment of the beam will decrease.

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