A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Cementitious backfill with high sulfur content: Physical, chemical, and mineralogical characterization
Use of cemented backfill in underground mining is common practice. The major economical benefits include increased recovery of ore and a reduction in the volume of waste requiring surface disposal. This paper presents new studies into the behavior of cemented backfill, namely, the chemical and mineralogical changes (weathering) with time that affect the mechanical strength of the fill. The weathering mechanism typically consists of sulfate attack. This process can occur rapidly during curing and depends on the binding agents used. The reaction involves dissolution of hydrated calcium phases followed by formation of expansive phases resulting in the degradation of the backfill's mechanical properties. The use of fly ash, which is resistant to sulfate attack, generally reduces any strength deterioration. These phenomena are illustrated with a case study that demonstrates the influence of these alterations on the long-term mechanical properties of a cemented paste backfill sampled in situ.
Cementitious backfill with high sulfur content: Physical, chemical, and mineralogical characterization
Use of cemented backfill in underground mining is common practice. The major economical benefits include increased recovery of ore and a reduction in the volume of waste requiring surface disposal. This paper presents new studies into the behavior of cemented backfill, namely, the chemical and mineralogical changes (weathering) with time that affect the mechanical strength of the fill. The weathering mechanism typically consists of sulfate attack. This process can occur rapidly during curing and depends on the binding agents used. The reaction involves dissolution of hydrated calcium phases followed by formation of expansive phases resulting in the degradation of the backfill's mechanical properties. The use of fly ash, which is resistant to sulfate attack, generally reduces any strength deterioration. These phenomena are illustrated with a case study that demonstrates the influence of these alterations on the long-term mechanical properties of a cemented paste backfill sampled in situ.
Cementitious backfill with high sulfur content: Physical, chemical, and mineralogical characterization
Benzaazoua, M. (author) / Ouellet, J. (author) / Servant, S. (author) / Newman, P. (author) / Verburg, R. (author)
Cement and Concrete Research ; 29 ; 719-725
1999
7 Seiten, 14 Quellen
Article (Journal)
English
| British Library Online Contents | 1999
Cementitious Backfill: The Swiss View
| British Library Conference Proceedings | 1998
FIELD TRIALS OF CEMENTITIOUS BACKFILL
| British Library Online Contents | 2000
Studies of high water and quick setting (HWQS) cementitious mine backfill
| British Library Conference Proceedings | 1999