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- W4288032620 abstract "Systematic study of the evolution of the uniaxial compressive strength (UCS) of cemented paste backfill (CPB) is presented using various mine site hypersaline water and synthetic brines. 5 and 9 wt% binder CPB were hydrated up to 56 days. CPB prepared with 1/3 hypersaline water reached the benchmark of 1 MPa at 14 and 7 days respectively for 5 and 9 wt% binder, while 2/3 and 85 % hypersaline water CPB showed improvement compared with both tap and hypersaline water. Synthetic brines replicating mine site water composition were prepared and showed similar enhanced mechanical performance (<7 days of hydration to reach benchmark). SEM-EDX probe of micro-morphology showed that cationic (Na+ and Mg2+) and anionic (Cl- and SO42-) concentrations at optimal performance produced distinct calcium silicate hydrate and ettringite formations, which combine to facilitate observed mechanical performance enhancement. Findings demonstrate systematic mixing water utilisation for CPB preparation can contribute to improved underground mine scheduling." @default.
- W4288032620 created "2022-07-27" @default.
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- W4288032620 date "2022-09-01" @default.
- W4288032620 modified "2023-09-26" @default.
- W4288032620 title "Cemented paste backfill compressive strength enhancement via systematic water chemistry optimisation" @default.
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- W4288032620 doi "https://doi.org/10.1016/j.conbuildmat.2022.128499" @default.
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