ABSTRACT
Brazil still has a low cement consumption (260 kg / inhab./year) when compared to the world average (553 kg / inhab./year), coupled with the country's high housing and infrastructure deficit and the expectation of population growth, points to a resumption of production growth in the medium / long term, increasing between 60% and 120% in 2050 compared to 2014 (in the low and high demand variants, respectively), however, the cement industry is adversely affected by about 5% of the world's CO2 emissions. Brazil is currently one of the world references in reducing the amount of clinker in cement. Therefore, different mineral additions are used to replace clinker in cement production, and several studies have been developed to further increase the use of these additions. , which represents the industry's main alternative and challenge in mitigating its emissions. Blast furnace slag and fly ash are already being used for this purpose, however, they are not sufficiently available to meet current market demand. Research looks for mineral additions that are in abundance all over the planet. The calcined clay and limestone filer were efficient when used simultaneously, giving rise to a new cement, LC³. This research proposes to analyze the percentage of substitution and relation between the additions that provides better compressive strength with greater sustainability of the LC³ cements. Mortars were made of cements with different levels of clinker replacement by mineral additions. The results indicate the technical viability of the good performance obtained by the LC³ cement, capable of replacing up to 45% of the clinker quantity, with substitution ratios of 2: 1 and 3: 1 (calcined clay: limestone.
Keywords
LC3; calcined clay; limestone filer; Performance index; sustainability
