Aproveitamento do bagaço de cana-de-açúcar para produção de cimento portland de cinzas volantes

Abstract

As a way to recycle the sugarcane bagasse discarded by sugarcane juice sellers, the present work has in view the use of this bagasse in the production of Portland Cement of Cinzas Volantes. Initially, CBCA (sugarcane bagasse ash) was prepared for incorporation in the production of Portland Cement from Ash Volantes. Then, 6 cement samples were produced in accordance with the specifications present in the NP EN 197-1:2017 standard, which had the following designation and composition: A-Standard composed of 100%Clinker; A-6 composed of 94%Clinker and 6%CBCA; A-13 composed of 87%Clinker and 13%CBCA; A-20 composed of 80%Clinker and 20%CBCA; A-27 composed of 73%Clinker and 27%CBCA; A-34 composed of 66%Clinker and 34%CBCA, where 5% of gypsum was added in the clinker composition in order to regulate the setting time. Then, the physical and mechanical properties of Portland Cement and Fly Ash Portland Cement samples produced on a laboratory scale were determined in accordance with cement testing methods defined in the NP EN 196 standard. Demonstrate the weakening of some properties, they are within the acceptable limits according to the NP EN 197-1:2017 standard. Sugarcane bagasse can be used in the form of ash as the main constituent to be incorporated in the production of Portland Cement with Fly Ash, as it was possible to produce cement classified in the 32.5N and 42.5N classes. The incorporation of optimal CBCA was 27%, since the results of mechanical resistance to a composition greater than 27% of CBCA were not satisfactory, and cannot be included in any of the classes of resistance predicted for current cement.