For several decades, the cement industry has been actively seeking alternative raw materials to reduce greenhouse gas emissions and energy consumption. In pursuit of partial replacements for clinker, worldwide research has focused primarily on industrial (fly ash, Si-Mn slag, fired clay-based) and agroforestry (rice husk, sugar cane) waste.
The common denominator in all such waste, its pozzolanicity, determines mechanical performance and durability throughout the service life of the cement produced. In this study, two types of industrial waste (construction and demolition waste and biomass waste) were added separately or jointly in different proportions to Portland clinker to ascertain the effect on the rheological, physical and mechanical properties of the resulting binary and ternary eco cements.
The use of biomass waste and the joint addition of both kind of wastes were observed to yield cements in which the fresh and hardened properties of the new eco-cement were not significantly lower than in conventional binders and these binders could be apt to use in the manufacture of cement-based material (mortar or concrete) with low-carbon footprint.
