Evaluating chemical properties and sustainable recycling of waste foundry sand in construction materials
Waste Foundry Sand (WFS) is a byproduct from metal casting processes, often contaminated with heavy metals, acids, and carbon residues. As disposal costs rise, there is growing interest in repurposing WFS as an alternative to traditional aggregates in construction materials such as bricks, tiles,...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Philipps-Universität Marburg
2024
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| Subjects: | |
| Online Access: | PDF Full Text |
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| Summary: | Waste Foundry Sand (WFS) is a byproduct from metal casting processes, often
contaminated with heavy metals, acids, and carbon residues. As disposal costs
rise, there is growing interest in repurposing WFS as an alternative to traditional
aggregates in construction materials such as bricks, tiles, and concrete. However,
concerns about the potential leaching of harmful chemicals into soil and
groundwater pose significant barriers to its widespread use. By reducing the
chemical pollutants, WFS becomes a competitive option for sustainable
construction materials. This study aims to address these concerns by
developing methods to extract WFS from the production cycle before it
exceeds regulatory limits, thereby enhancing its suitability for recycling and
reducing disposal costs. We assessed waste foundry sand (WFS) samples from
various production cycles, following permissible guidelines, by mixing them with
cement in proportions of 1%, 3%, and 5%. Our evaluation focused on their
effectiveness as construction materials. The results indicated that the sample
with 1% cement slightly exceeded the permissible limits for polycyclic aromatic
hydrocarbons (PAHs), whereas the samples with 3% and 5% cement content
complied with all regulatory standards. These findings suggest that WFS,
particularly when combined with higher cement contents, holds promise as a
sustainable construction material. This method not only reduces the need for
extensive treatment and reclamation processes but also presents a cost-effective
and environmentally friendly approach to managing WFS. |
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| Item Description: | Gefördert durch den Open-Access-Publikationsfonds der UB Marburg. |
| DOI: | 10.3389/fbuil.2024.1386511 |