Use of mine tailings as raw material in concrete and mortar mix proportioning

Tikou Belem, Bruno Bussière, Yasser Chtaini, Kumar Chandra Rohit

In the proceedings of: GEO2010 Calgary: 63rd Canadian Geotechnical Conference & 6th Canadian Permafrost Conference

Session: W1-B

ABSTRACT: In this preliminary study, three composite mixtures (1 concrete CC, 1 mortar CM and 1 mortar-like paste backfill MPB) and two standard/control mixtures (1 concrete C and 1 mortar M) were prepared. Composite mixtures contain sulphide tailings as a substitute for sand (fine or coarse). All mixtures had the same ratio w/c = 0.5 and a slump of about 20 cm. Nevertheless, it was observed that the cement has been over-proportioned. The results show that: UCSC > UCSM > UCSCM > UCSCC > UCSMPB.

RÉSUMÉ: Dans cette étude préliminaire, 3 mélanges composites (1 béton BC, 1 mortier MC, et 1 remblai en pâte-mortier RPM) et 2 mélanges standards (1 béton B et 1 mortier M) ont été formulés. Les mélanges composites contiennent des résidus miniers sulfureux comme substitut au sable (fin ou grossier). Tous les mélanges ont été préparés avec un même ratio w/c = 0.5 et un affaissement d'environ 20 cm. Malgré cela, il a été observé que le ciment a été sur-dosé. Les résultats montrent que : UCSB > UCSM > UCSMC > UCSBC > UCSRPM. 1 INTRODUCTION

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