Call For Paper Volume:4 Issue:10 Oct'2017 |

Strength Characterisation In Fly Ash With Recycled Concrete Aggregate

Publication Date : 28/02/2015



Author(s) :

A.N .Dabhade , Dr. S.R.Chaudhari , Dr. A.R.Gajbhiye.


Volume/Issue :
Volume 2
,
Issue 2
(02 - 2015)



Abstract :

In this experimental work, an approach has been made to determine the feasibility of recycled aggregate in the concrete. For that purpose two water cement ratios are chosen for making concrete mix of same characteristic strength. Again, to determine the effect of recycled aggregate on the strength, the percentage of the recycled is adjusted with 10%, 20%, 30%, 50% and 100%. It was found that with addition of recycled aggregate the concrete strength and workability decrease, to improve the strength and the workability, the flyash is added at the rate of 10% and 20% as replacement of PPC. The compressive strength of concrete is determined, after curing periods of 7, 28 and 90 days. To establish an empirical relationship between the strength of concrete and four variable parameters (i.e. percentage of RCA, percentage of flyash, curing age and water-cement ratio), two modeling methods were used namely to develop the mathematical model by Multi-linear Regression Method and to develop the Neural Network model by Artificial Neural Networking Method. The test results show that 90 days strength of mix RAC20+F10 is almost nearly greater or equal to strength of NAC based concrete. The compressive strength of 90 days, of the above mix was found to be 3.92% more than the natural aggregate based concrete on average. On the other hand, when water cement ratio is decreased, the 90 days compressive strength was found to be 2.97% for 7% decrement in water-cement ratio.


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Strength Characterisation In Fly Ash With Recycled Concrete Aggregate

February 24, 2015