Huik, Yohana Ruth Tania (2024) Pengaruh Diameter Tulangan Pengekang Bambu Terhadap Gaya Tekan Aksial Kolom Beton Bertulang Bambu. Undergraduate thesis, Fakultas Teknik Universitas Merdeka Malang.

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Abstract

Corrosion in reinforcement significantly affects the strength and durability of reinforced concrete structures. When reinforcement bars corrode, their function and bond with the surrounding concrete weaken, leading to structural degradation. Understanding how surface conditions of reinforcement influence corrosion rates and bond strength is essential for improving the performance and longevity of reinforced concrete structures. This study investigates the effect of corroded reinforcement surface conditions on corrosion rates and bond strength in concrete. Cylindrical test specimens (15 cm × 30 cm) were prepared using plain (Ø10 mm) and deformed (D10 mm) reinforcement bars in both corroded and non-corroded conditions, with five specimens for each group. Corrosion was accelerated using a 3.5% sodium chloride (NaCl) solution and the galvanostatic method over five days. Bond strength was tested at 28 days using the pull-out test method (ASTM C1583/C1583- 13), and corrosion rates were measured using the weight loss method (ASTM G31- 72). The results revealed that corroded plain reinforcement exhibited the highest corrosion rate at 26,486.63 mpy, while corroded deformed reinforcement exhibited a lower rate at 22,476.33 mpy. In terms of bond strength, non-corroded deformed reinforcement achieved the highest value of 7.96 MPa, while corroded plain reinforcement recorded the lowest at 5.53 MPa, representing a significant reduction due to corrosion. Reinforcement surface conditions significantly affect corrosion resistance and bond strength. Deformed bars perform better, making proper material and surface treatment essential for reliability.

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