Carbonation resistance of calcined clay-ground granulated blast furnace slag alkali-activated mortar

Gomes, Sandrine; Nguyen, Quang Dieu; Li, Wengui; Castel, Arnaud

doi:10.1016/j.conbuildmat.2023.131811

Cited by 18 publications

(1 citation statement)

References 46 publications

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“…It is also considered as the primary mineral for the construction and building industry. − In addition, lime (CaO), mainly from limestone decomposition, is a commonly needed oxide worldwide . They are considered fundamental precursors for numerous industries, especially cement and concrete materials. − Moreover, the calcination process of limestone is the major contributor to total CO 2 emissions in the cement industry, accounting for more than 40% of total CO 2 emissions in the cement industry. − All sectors worldwide face unprecedented challenges in CO 2 emissions and energy consumption issues. − …”

Section: Introductionmentioning

confidence: 99%

New Insight into Energy-Saving Calcination of Limestone: Preparation, Characterization, and Application of Partially Calcined Limestone

Qian,

Qin,

Liu

et al. 2023

ACS Sustainable Chem. Eng.

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This study presents an energy-saving calcination strategy using low temperatures and a controlled heating process for preparing partially calcined limestone. The low temperature and controlled heating ensure the high activity of the porous oxide and significantly reduce CO2 emissions and energy consumption. Reactants and products coexist in partial calcination to form a core–shell structure. Furthermore, the decarbonization of limestone is observed by multiple characterizations and interpreted visually. The prepared partially calcined limestone was used as a precursor for the cementitious materials. The compressive strength of cementitious materials with partially calcined limestone was significantly enhanced because of: (1) the increased activity of calcium oxide and (2) the presence of in situ nuclei. This is further demonstrated by the accelerated reaction heat release from the isothermal calorimetry test and the microstructure analysis. The challenges of partial calcination technology and its expanding applications are also highlighted.

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