Differential scanning calorimetry of high-performance concrete with burnt clay shale addition

Abstract

Paper presented to the 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Florida, 14-16 July 2014.Mineral additives are used in concrete primarily due to a positive effect on its mechanical properties. Using the differential scanning calorimetry, it is possible to observe thermophysical changes in concrete samples containing such additives at the microstructural level. In our study high-performance concrete samples with a different mass% of a burnt clay shale addition were prepared. The burnt clay shale is a pozzolana active material which can be used as a partial replacement for the cement binder. The aim of this paper is to investigate the hydration and pozzolanic reaction in a high-performance concrete with the burnt clay shale addition using differential scanning calorimetry (DSC) and thermogravimetry (TG). The investigation was performed in the temperature range from 25 to 1000 °C with a heating rate 5 °C/min in an argon atmosphere.