The use of calcium sulfo-aluminate cement as an alternative to Portland Cement for the recycling of municipal solid waste incineration bottom ash in mortar
| Autor: | Marc Antoun, Frédéric Becquart, Georges Aouad, Najib Gerges |
|---|---|
| Přispěvatelé: | Ecole nationale supérieure Mines-Télécom Lille Douai (IMT Lille Douai), Institut Mines-Télécom [Paris] (IMT) |
| Rok vydání: | 2020 |
| Předmět: |
Environmental Engineering
Aluminate 0211 other engineering and technologies Incineration 02 engineering and technology 010501 environmental sciences Solid Waste Coal Ash 01 natural sciences law.invention [SPI]Engineering Sciences [physics] chemistry.chemical_compound law 021105 building & construction Recycling Porosity 0105 earth and related environmental sciences Cement Waste management Construction Materials Pollution 6. Clean water Portland cement Compressive strength chemistry Bottom ash Environmental science Calcium Cementitious Mortar |
| Zdroj: | Waste Management and Research Waste Management and Research, 2020, 38 (8), pp.868-875. ⟨10.1177/0734242X20925170⟩ |
| ISSN: | 1096-3669 0734-242X |
| DOI: | 10.1177/0734242x20925170 |
| Popis: | Municipal solid waste incineration generates large quantities of bottom ash that should be recycled. Current use of municipal solid waste incineration bottom ash (MSWI-BA) in cementitious materials is mostly in Ordinary Portland Cement (OPC). This paper considers using MSWI-BA as sand substitution in Calcium Sulfoaluminate Cement (CSA) as an alternative to OPC. A comparison between OPC and CSA mortars containing 0–2 mm MSWI-BA is conducted. The MSWI-BA used was treated to remove the ferrous and non-ferrous metals in order to obtain a better mineral fraction. Different percentages (0%, 25%, 50%, 75%, and 100%) of standard sand were substituted by MSWI-BA based on equivalent volume. Experimental results showed that the compressive strength and porosity of the CSA mortars were superior to OPC after substitution at 1, 7, 28, and 90 days. The compressive strength of OPC mortars with 25% substitution decreased by 40% compared to 11% for CSA mortars at 90 days. This is due to the difference in pH between the two cement pastes as OPC in contact with the MSWI-BA leads to a reaction with the aluminum content which releases hydrogen gas, increases the porosity, and decreases the compressive strength. © The Author(s) 2020. |
| Databáze: | OpenAIRE |
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