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Combined influence of sulphate and temperature on the saturated hydraulic conductivity of hardened cemented paste backfill
Abstract This paper presents an experimental study that focuses on the investigation of the coupled effects of temperature and sulphate on the permeability of hardened cemented paste backfill (CPB). Hydraulic conductivity tests and a microstructural analysis are conducted on mature CPBs prepared with various amounts of sulphate (0, 5000, 15,000, and 25,000ppm) and cured at various temperatures (2°C, 20°C, 35°C, and 50°C). Important findings and valuable results are gained. It is found that the coupled effects of sulphate and temperature can lead to decrease (i.e. improvement of the environmental performance of CPBs) or increase of the hydraulic conductivity of CPBs. There is competition between the permeability decreasing and increasing factors. The dominant influencing factors depend on the curing temperature and initial sulphate content.
Combined influence of sulphate and temperature on the saturated hydraulic conductivity of hardened cemented paste backfill
Abstract This paper presents an experimental study that focuses on the investigation of the coupled effects of temperature and sulphate on the permeability of hardened cemented paste backfill (CPB). Hydraulic conductivity tests and a microstructural analysis are conducted on mature CPBs prepared with various amounts of sulphate (0, 5000, 15,000, and 25,000ppm) and cured at various temperatures (2°C, 20°C, 35°C, and 50°C). Important findings and valuable results are gained. It is found that the coupled effects of sulphate and temperature can lead to decrease (i.e. improvement of the environmental performance of CPBs) or increase of the hydraulic conductivity of CPBs. There is competition between the permeability decreasing and increasing factors. The dominant influencing factors depend on the curing temperature and initial sulphate content.
Combined influence of sulphate and temperature on the saturated hydraulic conductivity of hardened cemented paste backfill
Pokharel, M. (author) / Fall, M. (author)
Cement and Concrete Composites ; 38 ; 21-28
2013-03-22
8 pages
Article (Journal)
Electronic Resource
English
Saturated hydraulic conductivity of cemented paste backfill
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