Analysis of Reinforcement Corrosion Potential in Concrete with Partial Cement Substitution Using Pozzolan Ash, Rice Husk Ask, and Coconut Shell Ash

DOI

10.2991/978-94-6463-952-0_12How to use a DOI?

Keywords

corrosion; partial cement substitution; half cell – potential mapping

Abstract

This study aims to compare the corrosion resistance of normal reinforced concrete (TSNOR) with reinforced concrete in which 5% of the cement is partially substituted using pozzolan ash (TSPOZ), rice husk ash (TSRHA), and coconut shell ash (TSCSA). The test specimens were concrete beams with a water-cement ratio of 0,50 a compressive strength of 25 Mpa and dimension of 10×10×30 cm reinforced with a single BjTS 280 steel bar of 10 mm diameter. The concrete variations were tested under two different conditions, immersion in freshwater ground water using natural submersion and immersion in 3,5% NaCl solution using a wet - dry cycle for 54 weeks. Corrosion potential was measured using the half - cell potential mapping method, while concrete pH was measured using the ASTM F710 and ESL (Ex - Situ Leaching) methods. The corrosion phase was determined by analyzing the corrosion potential and pH values using the pourbaix diagram. Based on the results of the corrosion potential values and corrosion phases that occur in each concrete variation, the order of corrosion resistance from highest to lowest of the two immersion media treatment are TSRHA, TSPOZ, TSCSA, and TSNOR. The use of pozzolanic materials has proven to enhance long term corrosion resistance through secondary hydration reactions that produce additional C-S-H. These results indicate that utilizing locally sourced pozzolanic waste materials as partial cement substitutes can be an environmentally friendly alternative to support sustainable construction.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Tharisya Athaya
AU  - Yulia Hayati
AU  - Abdullah Abdullah
PY  - 2025
DA  - 2025/12/26
TI  - Analysis of Reinforcement Corrosion Potential in Concrete with Partial Cement Substitution Using Pozzolan Ash, Rice Husk Ask, and Coconut Shell Ash
BT  - Proceedings of the 6th Aceh International Symposium on Civil Engineering (AISCE 2025)
PB  - Atlantis Press
SP  - 132
EP  - 146
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-952-0_12
DO  - 10.2991/978-94-6463-952-0_12
ID  - Athaya2025
ER  -