Increasing Concrete Durability Against Organic Acid Corrosion with Coal Fly Ash and Bagasse Fly Ash as Cement Replacements

Abstract:

The deterioration of concrete from acid corrosion is a common issue in various industrial and natural environments. To address this problem, coal fly ash and bagasse fly ash were utilized as cement replacements in concrete. This study investigates the effects of these ashes on concrete's ability to withstand organic acid corrosion in depth, including a thorough examination of their chemical compositions, physical properties, and interactions within the concrete matrix. Furthermore, the research involves adjusting the blend proportions to provide exceptional resistance to acid corrosion. The results of the study highlight the significance of coal fly ash and bagasse fly ash in improving concrete's resistance to organic acid corrosion. The use of these materials as cement replacements significantly enhances concrete's resistance to organic acid corrosion, and this improvement becomes more apparent as substitution rates increase. This effect is primarily attributed to increased pozzolanic reactivity, resulting in a reduction in calcium hydroxide concentration within the cement matrix.

• Periodical: Materials Science Forum (Volume 1123)
• Pages: 23-28
• DOI: https://doi.org/10.4028/p-tM8Lwe
• Online since: July 2024
• Authors: Jensak Koschanin*, Phongthorn Julphunthong
• Keywords: Bagasse Fly Ash, Coal Fly Ash, Concrete, Corrosion, Organic Acids

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