228 / 2022-06-12 17:36:33

Limestone calcined clay cement (LC3) concrete and LC3 concrete structure: research status in Shenzhen University

Limestone Calcined Clay Cement (LC3); LC3 Concrete; Mechanical Performance; Flexural Behavior; Bond Behavior; Energy Saving

To address the inadequacy of traditional supplementary cementitious materials (SCMs), limestone calcined clay cement (LC³) appears to be an excellent alternative. Both kaolinite clay and limestone are abundant worldwide, which ensures an adequate supply. The production of both materials consumes low amounts of energy, and the resulting CO₂ emission is largely reduced compared to conventional cement clinkers. Extensive studies concerning the hydration mechanism and microstructural characteristics of LC³ and the macrostructural mechanical performance of LC³ concrete have been carried out in Shenzhen University. Various LC³ concrete types including natural aggregate concrete, recycled aggregate concrete, seawater sea sand concrete, engineered cementitious composites, and ultra-high performance concrete have been investigated. The flexural behaviors of LC³ (recycled) concrete beams reinforced by CFRP, steel or their hybrid were studied, and the bond behavior between LC³ concrete and CFRP/steel has been investigated. Besides, the stress-strain modelling of LC³ concrete has been performed, and the life cycle design and energy saving analysis of LC³ concrete structure has been conducted.