Prediction of Moment Strength of Steel Reinforcement Concrete Bar in NaCl Environment

International Journal of Civil Engineering

© 2022 by SSRG - IJCE Journal

Volume 9 Issue 11

Year of Publication : 2022

Authors : Suparjo, Yuli Panca Asmara

10.14445/23488352/IJCE-V9I11P107

How to Cite?

Suparjo, Yuli Panca Asmara, "Prediction of Moment Strength of Steel Reinforcement Concrete Bar in NaCl Environment," SSRG International Journal of Civil Engineering, vol. 9,  no. 11, pp. 50-55, 2022. Crossref, https://doi.org/10.14445/23488352/IJCE-V9I11P107

Abstract:

Designing concrete infrastructure in seawater conditions is a challenge for engineers. Seawater contains aggressive chemicals such as chlorine ions and CO2 gas, influencing steel-reinforced concrete (RC) strength. The strength of RC reduces gradually as the effect of steel corrosion. Corrosion on reinforcing steel bars continuously increases over a specific time before the collapse. Factors influencing the corrosion rate are concrete porosity, the concentration of chlorine ions, and the humidity of the concrete. This research studies the remaining moment strength of rebar as effects of chlorine ion concentration, temperature, pH, and dissolved oxygen. The moment strength of concretes is determined mathematically using mathematics models referred to as ACI 318-14 standard. The models calculate corrosion based on references and model software predictions. The research was to study empirical corrosion rate models for NaCl solutions representing seawater conditions. Investigation parameters determining the rate of corrosion on reinforcement steel in NaCl solution can be used to predict the service life of concrete structures.

Keywords:

Corrosion rate, Carbon steel, Rebar, Seawater environment.

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