Valuation of foundry sand in the construction sector.

The purpose of this work is to find out the possibility of valorizing the green foundry sand from the foundry of EPE-ALFE, Tiaret, Algeria in construction. Mortars which are based on this sand were made and their mechanical behavior was evaluated. The first results showed that the strengths of these mortars represent approximately 74% to 80% of the resistance of the control mortar based on quarry sand from Guelta, Algeria, so, the mixture of 30 to 50% of quarry sand with the Foundry green molding sand increases this interval and gives an ordinary mortar with compressive strengths varying between 25 and 30 MPa which allows an extended use of this sand meeting the 206.1 standard of concrete. This solution represents an economic choice in construction which makes it possible to recycle around 50% of the quantity of foundry sand for any concrete production and it will help with the elimination of waste and the rapid release of storage areas at the level of foundries as well meet the requirements of the quality assurance plan.