Coupled Behavior of Cemented Paste Backfill at Early Ages

摘要: Once cemented paste backfill (CPB) is poured into a mine stope, it subjected to strong coupled thermal (T), hydraulic (H), mechanical (M) and chemical (C) processes. A laboratory investigation performed understand the THMC behavior of CPB at early ages. An experimental setup developed study CPB. The testing monitoring are conducted in undrained conditions, with without pressure application, take consideration two types tailings (artificial natural). evolutions total pressure, pore suction, temperature electrical conductivity monitored for period 7 days. Also, samples tested or analyzed regards their shear strength properties, conductivity, physical microstructural characteristics 1, 3 obtained results show that properties strongly due several mechanisms, such as curing stress, heat hydration, self-desiccation fluid chemistry. presented this paper will provide better understanding ages thus contribute designing structures.