| Autor: |
Dias, Eduardo A.P., Azevedo, Adriano G.S., Savastano Junior, Holmer, Borges, Paulo H.R. |
| Zdroj: |
Carbon Capture Science & Technology; September 2024, Vol. 12 Issue: 1 |
| Abstrakt: |
Accelerated carbonation of Ca- and Mg-rich solid wastes is a transformative method to control CO2emissions and eliminate waste and by-products, such as basic oxygen furnace slag (BOFS). This technology is considered a feasible method to limit volumetric instability and bring economic and environmental value to BOFS aggregates. This study evaluated the effect of pre-treatment carbonation conditions (temperature, moisture conditions and CO2pressure) of BOFS subsequently used as aggregates for alkali-activated mortars. The mechanical, physical and microstructural properties of alkali-activated mortars containing 100 % BOFS aggregates carbonated from different conditions were assessed. The results showed that the carbonation process of BOFS aggregates is mainly influenced by its moist conditions, followed by the CO2pressure. In general, carbonated BOFS aggregates present after the pre-treatment a rougher surface characterized by a higher specific surface area, which improves the bonding between the matrix and aggregate, with consequent improvements in the mechanical properties of the alkali-activated mortars. |
| Databáze: |
Supplemental Index |
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