Prediction of the modulus of elasticity of high strength concrete



The prediction of the mechanical characteristics of concrete according to its components’ properties has been of great interest. In the current study, attempts have been made to extract some experimental models to predict the modulus of elasticity of high strength concrete based on some known characteristics of the concrete mix. To do so, 45 mix proportions including 5 different ratios of silica fume, i.e., SF/CM = 0, 5, 10, 15 and 20 percent, 3 water to cementitious materials ratios, i.e., W/CM = 0.24, 0.3 and 0.4, and 3 types of coarse aggregates, i.e., limestone, quartzite and andesite were selected. 540 cylindrical specimens were cast, cured and tested after 7, 28 and 91 days. Regarding different ratios of silica fume and different ratios of W/CM, the relationship of modulus of elasticity of coarse aggregate and concrete at different ages was discussed and some empirical equations were proposed. Special emphasis was paid on two proposed models, the comprehensive model and the simple model. The credibility of the models was verified using some independent experimental data.