Optimizing Mixtures for Mass Concreting in Hot Weather Conditions

Abstract This research focuses on optimizing concrete compositions for the construction of massive structures in hot climates. The study analyses the effects of mineral and chemical additives on heat generation, concrete hardening processes, and reducing the risk of thermal cracking due to temperature gradients. The selection of cement types and the formulation of complex additives are designed to maintain the workability of concrete mixtures while minimizing heat generation during hydration. These objectives are achieved through calorimetric analysis and temperature monitoring of cement system hardening. A highly workable concrete mixture with a compressive strength exceeding 50 MPa was developed and tested during the concreting of a massive pile cap. Recommendations are also given on limiting the size of massive structures in which the proposed compositions can be used without additional technical solutions for cooling. A separate issue is raised regarding the possibility of increasing the permissible temperature gradients >20°C in reinforced massive structures, which requires further research.