THE EFFECT OF CURING TEMPERATURE ON THE PHYSICAL PROPERTIES OF HYDRUALIC BACKFILL AND GELFILL

World Mining Congress
This paper presents and compares the physical properties of Gelfill and cemented hydraulic fill (CHF) obtained by lab experiments. Gelfill has an alkali activator such as sodium silicate in its materials in addition to primary materials of cemented mine backfill which are deslimed tailings, water and binders. The CHF and Gelfill samples with various mixture designs were cast and cured for 28 days. Initially, the influence of sodium silicate concentration on the mechanical properties of samples was evaluated using the unconfined compressive strength (UCS) test. Consequently, the effect of curing temperature on CHF and Gelfill samples cured in various curing temperatures ranging from 5–50 °C was studied using the UCS test. Microstructure of selected samples was studied wirth the mercury intrusion porosimetry (MIP) technique.
Keywords: Temperature; sodium silicate; Strength; Binder; Binders; Tests; test; Mechanical; Materials; Slags;
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