Vol. 3, Issue 1 (2018)
Experimental analysis of mix design method of concrete using fly ash
Author(s): Devender Kumar Beniwal, Sandeep Singh
Abstract: Objective: To analyze and study various mechanical properties of fly ash concrete with that of convention concrete and also to check at what percentage of fly-ash gives better and economic result. Methods: The cubes were being tested for their compressive strength using a compression testing machine as per the mix design. USPV is a recognized non-destructive test which is done to evaluate the quality of given concrete sample. It allows us to assess the condition of the ancient structures as well as maintain the quality of new structures. Fire test is carried out to check how concrete withstands all the different types of loads even with the increase in the temperature. Findings: The compressive strength of concrete will increase up to 25% replacement of fly ash and then will subsequently decrease. The compressive strength also reduces if the cement used is old. The workability of the mix increases with the increase in fly ash content even when the water cement ratio is kept constant. USPV Test analysis shows us that there is a better orientation of concrete mix particles with the increase in fly ash content. The packing of lime-fly-ash concrete cubes was found to be best for the ratio of 60% cement and 20% of lime and fly-ash each. Improvement: The use of fly ash in concrete is not a new practice and though much work has already been done in this field, it is a field of continuing research. Also to study the use of other chemicals as a binder material in fly ash concrete, for e.g. sodium silicate, sodium hydroxide etc. We can also study the effect of the addition of various admixtures in fly ash concrete. And also, study the effect of the addition of rice husk in fly ash concrete.