Abstract
The coal gangue in this dataset was subjected to a series of processes, including drying, crushing, and milling. Subsequently, the coal gangue powder was subjected to high-temperature calcination in a muffle furnace, with a heating rate of 4 ℃/min. The pozzolanic activity of coal gangue powder was investigated at various calcination temperatures (600 ℃, 700 ℃, 800 ℃, 900 ℃) and different holding times (1h, 2h). Cement mortar specimens containing calcined coal gangue powder were prepared, and their compressive and flexural strengths were tested to evaluate the reactivity of the calcined coal gangue. In addition, the Rapid, Relevant and Reliable (R3) activity test was conducted to test the reactivity. The thermogravimetric analyzer was employed to determine the TG-DTG curves of coal gangue powder. X-ray diffractometer, Fourier infrared spectrometer and scanning electron microscope were utilized to investigate the microstructure of activated coal gangue powder at different temperature ranges. These data can be used for determining the optimal calcination scheme of coal gangue to maximize its potential as a partial cement clinker replacement in cement production, thereby contributing to cost reduction and carbon emission mitigation.