Estimating concrete strength using a modified maturity model

The maturity concept has been widely used for decades as a proper approach for estimating the in situ strength of concrete at different ages and at different curing temperatures. Various maturity models and equations have been developed and proposed in the last three decades to be used in estimating the strength of concrete cured at different temperatures. Most of the developed models estimate the strength of concrete at early ages reasonably well, but fail to estimate the strength at later ages with the same accuracy. In this paper a general review of the development of the maturity concept is presented, showing the drawbacks of the present models. A modified maturity model is presented and validated using collected experimental data available in the literature. The model shows that a better estimation of concrete strength at later ages is achievable.