RESPONSE OF COCONUT FIBER CONCRETE CONTAINING RICE HUSK ASH AS A CEMENT SUBSTITUTE TO SALT ATTACK EXPOSURE

Josef Hadipramana

Abstract


Many recent studies related to environmentally friendly concrete utilizing organic materials are considered as major breakthroughs. However, research related to corrosive environments is still limited. In this study, the resistance to salt-attack on coconut fiber (CF) concrete as reinforcement and rice husk ash (RHA) as a cement substitute was carried out. 3 variations of coconut fiber 0.3%, 0.5%, and 1% of the concrete weight were used. While 1% RHA was used to replace some of the cement. All concrete specimens were soaked in sea salt water until 90 days old. The results showed a decrease in compressive strength based on age when immersed in salt solution. The largest decrease in concrete strength occurred in the 1% variation with a percentage decrease of 30.58%. Visually, it was found that there was a change in color in the test specimen to yellowish and there was erosion damage on the concrete surface. The greatest damage occurred in the 0.1% variation, while in the 0.3% variation there was no significant physical change. The results showed that the greater the fiber composition, the lower the durability against salt attack. The use of coconut fiber with a variation of 0.3% has the greatest durability.


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References


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DOI: https://doi.org/10.3059/insis.v0i0.29487

DOI (PDF): https://doi.org/10.3059/insis.v0i0.29487.g15062

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