Yeni Sesti Ariningsih, Devi Nuralinah, Eva Arifi
Research on recycled concrete aggregate (RCA) to replace natural coarse aggregate (NCA) is increasing recently, to reduce natural resource exploitation and environmental pollution caused by concrete waste. In order to develop the utilization of recycled aggregate concrete (RAC) in the marine environment, it is necessary to investigate its strength due to the penetration of chloride ions into the concrete. The aim of this study is to observe the effect of chloride diffusion in submerged conditions on compressive strength and modulus of elasticity of concrete using NCA and RCA. The 24 pieces of cylindrical specimens and 6 pieces of prism-shape specimen were made and wet cured for 28 days. The compressive strength test and modulus of elasticity test of concrete cylinders were carried out at the age of 28 days and then being immersed in 4% NaCl solution for 1, 3, and 5 months. In addition, the chloride concentration tests of concrete prism-shaped were carried out with the same concrete cylinders treatments. The result shows that the compressive strength and modulus of elasticity of RAC were lower than those of natural aggregate concrete (NAC). Furthermore, the chloride diffusion into the concrete for exposure up to 5 months, does not significantly affect the deterioration of the mechanical properties of RAC and NAC. © 2023 by authors. All rights reserved.
Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya, Indonesia
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