Effect of carbide slag as a supplementary calcium source on the mechanical properties, hydration characteristics, and sustainability of low-clinker limestone calcined clay cement (LC3)
Source abstract
Abstract
To overcome the strength degradation caused by the clinker dilution effect in low-clinker limestone calcined clay cement (LC3) systems, this study systematically investigates the influence of carbide slag (CS) and its carbonated product on the hydration, microstructure, and sustainability of low-clinker LC3. The results showed that CS addition effectively compensates for the alkalinity deficiency, while the nano-scale CaCO 3 on the carbonated CS surface significantly accelerates hydration kinetics. The compressive strength of LC3-20 at 28d significantly increased from 25.7 MPa to 39.2 MPa with CS addition, successfully offsetting the strength loss induced by the clinker reduction. Microstructural characterization confirms that CS promotes carboaluminate precipitation and refines the pore structure, resulting in a 15.66% reduction in total porosity of LC3-20 system. Furthermore, LC3-20 with CS addition achieves a 79.76% reduction in CO 2 emissions compared to conventional cement. This study aims to achieve a balance between the mechanical performance and carbon emission in low-carbon cement.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Concrete and Cement Materials Research · Magnesium Oxide Properties and Applications · Concrete Properties and Behavior
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (37)
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