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RECYCLING OF FOUNDRY SAND WASTES IN SELF-COMPACTING MORTARS: USE AS FINE AGGRGATES

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RECYCLING OF FOUNDRY SAND WASTES IN

SELF-COMPACTING MORTARS: USE AS FINE AGGREGATES

Authors

Brahim Safi, Ghania Sebki, Kahina Chahour, Amrane Belaid

Publication date

2017

Journal

International Multidisciplinary Scientific GeoConference: SGEM

Volume

17

Pages

177-184

Publisher

Surveying Geology & Mining Ecology Management (SGEM)

Description

The foundry sand wastes (FSW) are likely to constitute as raw material for the manufacture of cement mortars or concretes at a low cost. For this reason, present work has main objective to use the foundry sand wastes in self-compacting mortar as a fine aggregate (by a partial sand substitution). An experimental tests were carried out to evaluate fresh (slump test) and hardened (bulk density, compressive and flexural strength and elastic modulus) properties of SCMs based on FSW. The Natural Sand (NS) is substituted by FSW at dosages (0%, 10%, 30% and 50% wt.). The results show that fluidity was slightly decreased and was corrected by addition a few quantity of superplasticizer. However, the measurements of mechanical properties show that compressive strength of mortars has been significantly improved at short and long term. It follows that it is possible to use this waste type up to 30% of FWS as sand without …

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