Correlation between Actual and Estimated W/C Ratio of Fresh Concrete

The quality of cement-based material is most important parameter in construction industries. To decide whether the quality of concrete is good enough or not, it is the first most priority to determine the water cement ratio of concrete. To determine the water cement ratio of fresh concrete in less time, a new method named as “Electrical Resistivity” by wenner’s array and the same method is adopted in this work. A total number of three mixtures were designed and prepared with varying water cement ratio (0.4,0.5 &0.6) with replacement of 25% of fly ash according to IS 456-2000 code recommendations and experiments were conducted on these mixtures for determination of actual and accurate water cement ratio instantaneously. The fresh mixtures with different w/c ratio may have very similar (porosities) or overall water content.