STATISTICAL MODELING TO FORECAST THE STRENGTH OF CONCRETE USING ACCELERATED CURING

Shubham Amritkar, Nishant More

Abstract: It is very much necessary to know the performance of the concrete mix before their actual use on site. The fact that all the required readings of concrete are only obtained after 28 days of curing which becomes a constraint when various grades of concrete are to be used in the same work. Accelerated curing of concrete is a good solution in such cases. IS 9013-1978 gives detailed description as well as guidelines to be adopted during the process of accelerated curing along with an equation to predict the 28 days strength of the concrete. An equation which predicts the achievable strength of concrete under normal curing by using the accelerated curing strength as the dependent parameter is available in the IS code. In this paper we have analyzed the reliability of the equation when additives such as fly ash are used in the mix. At the end it was found that the predicted values largely varied from the actual values obtained from the IS code. In this paper an effort is made to form a new equation by using 3 independent variables such as the fly ash content, water-cement ratio and the accelerated curing strength to obtain fairly reliable results.

Keywords: Statistical modelling, Regression, Strength of concrete, Accelerated curing, fly ash

DOI: https://doi.org/10.15623/ijret.2015.0411018