Effect on Mechanical Properties of Concrete by Partial Replacement of Fly Ash and Silica Fume
Journal Title: International Journal of engineering Research and Applications - Year 2017, Vol 7, Issue 9
Abstract
In the present study the effect of addition of fly ash and silica fume with different proportions in concrete on mechanical properties has been studied. In this study 8 different mixes were prepared, in which mixes of fly ash and silica fume at different ranges ( CM, 0FA30SF, 5FA25SF, 10FA20SF, 15FA15SF, 20FA10SF, 25FA5SF, 30FA0SF ) are replaced by weight of cement and strength properties are determined for 7 days and 28 days of curing. The replacement of silica fume at 30% by wt. of cement gives higher values of compressive strength and split tensile strength. Lower values were observed when fly ash replacement by weight of cement in concrete gets increased. Mix with 15% FA 15% SF and 5% FA 25% SF was found to increase the compressive strength and split tensile strength when increase in the fly ash replacement by weight of cement result in the decrease in compressive strength at 7 days and 28 days of curing. Mix with30% FA has lower strength.. At 28 days, mix with 20%FA10%SF, 25%FA5%SF and 30%FA0%SF result in decrease in strength as compared to the normal mix. Flexural strength of concrete with replacement by fly ash and silica fume by weight of cement in different proportions were found increases for 7 days of curing and for 28 days its goes decreasing. Mixes with proportions of 0%FA30%SF, 10%FA20SF and 30%FA have higher values of strength as compared to normal mix after 7 days of curing. At 28 days mixes with very lower values of split tensile strength as compared to normal mix are 20%FA10%SF and 25%FA5%SF.
Authors and Affiliations
Dr. Sanjeev Kumar Gupta, Salvant Raj, Malkiyat Singh
Keywords
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- EP ID EP392127
- DOI 10.9790/9622-0709020106.
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