Effect and mechanism of coal gangue concrete modification
Aug 02, 2021 1. Introduction. Coal gangue is a type of solid waste produced in the coal mining and washing processes. The global coal mining industry produces approximately 350 million tons of inactive gangue each year, and the accumulated coal gangue in China alone amounts to 6.0 billion tons , , .In Spain, about 2 million tons of coal mine waste were produced in 2009.