Carbonation of concretes containing LC³ cements with different supplementary materials

Due to the clinkerization process during Portland cement production, large amounts of CO2 are emitted, increasing effects related climate change (approximately 5-10% global emissions come from production), consequently, seek for alternatives mitigate these high necessary. The use supplementary cementitious materials (SCM) partial replace Portand clinker/cement has been subject different research, including LC3 cements (Limestone Calcined Clay Cements), where up 50% clinker can be replaced, however, industry already used othersupplementary with pozzolanic activities in commercial cements. In this sense, work evaluates performance concretes containing mixtures presence SCM (silica fume, fly ash, sugarcane bagasse ash and açaí stone ash) regarding durability issues by carbonation. results showed that all presented higher carbonation fronts relation reference concrete, cement, due lower availability calcium react penetrates into concrete pores, so adoption curing procedures coatings recommended.