Journal
INTERNATIONAL JOURNAL OF MINING RECLAMATION AND ENVIRONMENT
Volume 27, Issue 4, Pages 231-256Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/17480930.2012.680754
Keywords
cemented paste backfill; apparent yield stress; binder content; zeta potential; pore fluid chemistry
Funding
- NSERC
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The effect of specimen composition on the apparent yield stress of cemented paste backfill (CPB) is studied using a Brookfield rotational viscometer with vane geometry. The factors that are assessed include binder type and content, selected chemical admixtures (superplasticizers) and pore fluid chemistry (e.g. ionic concentration and pH). The difficulties associated with performing viscosity measurements on high solids content mixtures are addressed. Additionally, the zeta potential of the mine tailings is measured using an electroacoustic spectrometer. The data indicates that particle packing, electrostatic forces and hydration of the cement affect the flow behaviour of CPB.
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