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Evaluation of the effect of sodium silicate addition to mine backfill, Gelfill – Part 2: Effects of mixing time and curing temperature

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Kermani, M., Hassani, F.P., Aflaki, E., Benzaazoua, M. et Nokken, M. (2015). Evaluation of the effect of sodium silicate addition to mine backfill, Gelfill – Part 2: Effects of mixing time and curing temperature. Journal of Rock Mechanics and Geotechnical Engineering , 7 (6). p. 668-673. doi:10.1016/j.jrmge.2015.09.004 Repéré dans Depositum à https://depositum.uqat.ca/id/eprint/1006

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Résumé

The effects of mixing time and curing temperature on the uniaxial compressive strength (UCS) and microstructure of cemented hydraulic fill (CHF) and sodium silicate-fortified backfill (Gelfill) were investigated in the laboratory. A series of CHF and Gelfill samples was mixed for time periods ranging from 5 min to 60 min and cured at temperatures ranging from 5 �Cto 50 �C for 7 d, 14 d or 28 d. Increasing the mixing time negatively influenced the UCS of Gelfill samples, but did not have a detectable effect on CHF samples. The curing temperature had a strong positive impact on the UCSs of both Gelfill and CHF. An elevated temperature caused rapid UCS development over the first 14 d of curing. Mercury intrusion porosimetry (MIP) indicated that the pore size distribution and total porosity of Gelfill were altered by curing temperature.

Type de document: Article
Informations complémentaires: Licence d'utilisation : CC-BY-NC-ND 4.0
Mots-clés libres: Gelfill; Cemented hydraulic fill (CHF); Sodium silicate; Mercury intrusion porosimetry (MIP); Drainage
Divisions: Mines et eaux souterraines
Date de dépôt: 01 avr. 2020 16:17
Dernière modification: 28 mai 2020 18:08
URI: https://depositum.uqat.ca/id/eprint/1006

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