Performance evaluation of response surface methodology optimization of the mechanical performance in self-curing concrete

The capacity of self-curing (SC) concrete to increase sustainability and building efficiency by reducing the need for external curing methods has drawn much interest. Superabsorbent polymer (SAP) materials, when used as an admixture in concrete, act as internal curing aids, air-entraining agents, and regulate autogenous shrinkage. The study explored the effect of silanized nanotitania (SNT) combined with SAP on the properties of concrete, where 0–1% of SNT/SAP composite was added by the weight of cement and utilized in concrete. A laboratory testing program gathered experimental data for response surface methodology to develop mathematical models and strength predictions for optimal mix ratios of silane, NT, and SAP. The study explored the effects of SNT/SAP composite dosage rates on self-curing concrete. Higher SNT/SAP concentration levels produced increased densities in fresh and hardened concrete. The mathematical models developed for predicting the properties of SNT/SAP-modified concrete were substantial, with experimental validation showing improved accuracy and errors of fewer than 6%. The ideal SNT/SAP concentration noted was 0.75 % of the mass of the cement added to the concrete.