USE OF REPLACEMENT PARTIAL CEMENT BY ASH CANE-DE-ACÚCAR BAGASSE IN CONCRET: UTILIZAÇÃO DA SUBSTITUIÇÃO PARCIAL DO CIMENTO POR CINZA LEVE DE CANA-DE-AÇÚCAR EM CONCRETOS

• Autor(a) principal: Hojo, Liri Yoko Cruz Prieto
• Data de Publicação: 2015
• Outros Autores: Martins, Carlos Humberto
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Mix Sustentável (Online)
• Texto Completo: https://ojs.sites.ufsc.br/index.php/mixsustentavel/article/view/1135
• topic: Cimento; Bagaço de cana; Concreto; cement; concrete

Fly ash is a waste from the sugarcane bagasse burn process for electric power co-generation. This studywas developed in order to analyze the fly ashes’ pozzolanic potential, by the application of different substitutions percentiles of Portland - starting with 0%, 2,5%, 5%, 7,5% until 10% - in concrete specimens aiming theevaluation of its mechanical strength and microscopically analyze through microscopy electron assays (SEM). Ithas been defined two mix proportions to the specimen with substitutions, one of these with regular cement proportion and other with rich mix proportion. The results has shown that fly ashes has higher pozzolanic activitylevels than the minimum required on the compressive strength tests, the regular mix-proportion specimens withsubstitution up to 7,5% of cement by fly ash showed a 29MPa resistance, similar to the standard (0%), and therewas also a reduction on the cement consumption from 367 kg/m³ to 339kg/m³. The SEM tests showed that thehigher the substitution percentiles the bigger the transitional zone components as the portladite and ettringitewill be in comparison with calcium silicate hydrate, which confers the concrete resistance