Department of Geotechnics and Transportation, School of Civil Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia.
Centre of Tropical Geoengineering (GEOTROPIK), School of Civil Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia.
Environ Sci Pollut Res Int. 2021 Oct;28(40):57308-57320. doi: 10.1007/s11356-021-14718-4. Epub 2021 Jun 4.
Proposals have been made by several researchers to conduct the sequestration of carbon dioxide (CO) through calcium and magnesium-rich materials. From these materials, ground granulated blast furnace slag (GGBS) containing 5% magnesium and 45% calcium is seen to be a good candidate and is available to sequester CO. This study intends to ascertain the ability to absorb CO, sequester it, and increase treated kaolin strength with different content of GGBS under various carbonation periods with varying CO pressure. The impacts of carbonated GGBS on the mechanical attributes of soil were examined by conducting the unconfined compressive strength (UCS) test, and microstructure analysis was conducted to identify the changes in the structure and Crestline phase. Stationary carbonation in a triaxial test with pure CO was conducted to accelerate the carbonation process. The outcome indicates that the strength rises as the carbonation period rises. Likewise, UCS rises as the CO pressure rises from 100 to 200 kPa. It could be concluded that augmentation of the strength is because of carbonated calcium and magnesium products which stuff the soil voids. Changes occur on the microstructure level due to carbonation as well.
一些研究人员提出了通过富含钙和镁的材料来进行二氧化碳（CO）捕集的建议。在这些材料中，含有 5%镁和 45%钙的磨细粒化高炉矿渣（GGBS）被认为是一种很好的候选材料，可以用来捕集 CO。本研究旨在确定在不同的碳酸化期和不同的 CO 压力下，用不同含量的 GGBS 吸收 CO、将其封存以及提高处理后的高岭土强度的能力。通过进行无侧限抗压强度（UCS）试验，研究了碳酸化 GGBS 对土壤力学性质的影响，并进行了微观结构分析，以确定结构和 Crestline 相的变化。在三轴试验中用纯 CO 进行固定碳酸化以加速碳酸化过程。结果表明，随着碳酸化期的增加，强度增加。同样，当 CO 压力从 100kPa 增加到 200kPa 时，UCS 也会增加。可以得出结论，强度的增加是由于碳酸化钙和镁产物填充了土壤空隙。由于碳酸化，微观结构水平也会发生变化。
