ASSESSMENT OF UP-SCALABILITY AND REPLICABILITY OF LIFE ECO-SANDFILL SFS VALORISATION SOLUTION
After an initial assessment of barriers and drivers for industrialisation of the proposed solution of recovering reclaimed SFS as secondary aggregate in construction sector, made by the consortium, gathering the perspectives of the foundry and the construction company on technical, economic, logistics, market and regulatory issues, and considering the later experience during the demos, issues raised and results of performance tests, a SWOT analysis was conducted to summarise all the considerations from the consortium for the reclaimed SFS utilisation in the construction and foundry sectors.
According to the SWOT analysis performed and the results at lab-scale, some main conclusions arose regarding technical construction performance, and their impact in their market potential:
ECONOMIC ASSESSMENT (LCC)
A life cycle costing assessment (LCC) has been conducted, following the methodology described in standard ISO 15686-5:2017 “Building and constructed assets - Service life planning - Part 5: Life-cycle costing”. The economic impacts of the LIFE ECO-SANDFILL reclaiming process have been assessed and compared with those of the thermally reclaimed SFS and those of the production of virgin sand. Four main cost categories have been considered: investment costs, manpower costs, energy costs and waste management costs.
The results show that obtaining reclaimed SFS through the LIFE ECO-SANDFILL mechanical process (operating conditions: batch=60 kg, rotation speed = 2235 rpm, residence time = 60 s) has lower costs than thermal reclamation, regardless of the hours spent on reclaiming operation per day. The more time the reclaiming operation is performed per day, the lower the cost per tonne of SFS reclaimed. Thus, costs can drop from almost 60 €/t when spending just 1 hour per day reclaiming SFS, to 10.20 €/t when reclaiming operation runs for 8 h/day.
When comparing costs of SFS reclaimed in the prototype with prices of virgin sand, results vary depending on the sector: