Abstract
The feasibility of incorporating fly ash and metakaolin (MK) in producing modern-day concrete of enhanced mechanical performance was studied to evaluate the application of such concrete at a mass scale. Research was carried out via partial substitution of cement with MK and fly ash and the effect on flexural strength (FS), compressive strength (CS) and split tensile strength (STS) of Mix 30 concrete was investigated, while maintaining the same water–cement ratio of 0.45 as in normal concrete. To find the optimum proportion of replacement for best performance, the amount of cement in concrete was replaced with 5, 10, 15, and 20% each of (MK) and fly ash by weight. The results show that replacing cement improves concrete’s CS, FS, and STS, with the highest results achieved when cement was substituted with 5% fly ash and 10% MK in concrete. MK was found to be most effective at a level of 10% for all percentages of fly ash and cement in the mix. The study of long-term performance and durability of concrete for ensuring long-lasting effects and mass applications is highly recommended for future research on the subject.
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Singh, S.K., Singh, M., Goyal, R. (2022). Effect of Adding Fly Ash and Metakaolin on Mechanical Properties of Concrete. In: Gupta, A.K., Shukla, S.K., Azamathulla, H. (eds) Advances in Construction Materials and Sustainable Environment. Lecture Notes in Civil Engineering, vol 196. Springer, Singapore. https://doi.org/10.1007/978-981-16-6557-8_85
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