Per: Gercyr Baptista Junior (instituto federal do espírito santo), Leila celin nascimento (Instituto Federal do Espírito Santo), Gustavo de Castro Xavier (Universidade estadual norte fluminence), Afonso Rangel Garcez de Azevedo (UNIVERSIDADE ESTADUAL NORTE FLUMINENsE), Carlos Maurício Fontes Vieira (UNIVERSIDADE ESTADUAL NORTE FLUMINENSE)
Abstract:
The demand for raw materials and the consequent reduction of natural resources have demonstrated the need for new approaches to building materials. The option that has become viable is the use of waste in cementitious materials, through incorporation, substitution or addition. In this sense, the present work aims to evaluate the potential of using biomass ash - BBA for the production of mortars. BBA was characterized by laser particle size, XRF, XRD, and SEM. The mortars were produced with CPV ARI Portland cement and quarry sand in a 1:3 pattern, with cement replacement percentages of 5%, 10% and 15% and fine aggregate substitution in 2%, 4% and 6%. The results at 28 days in the hardened state show that, considering the tensile strength in flexural, it is possible to reduce cement consumption by up to 15%. On the other hand, the compressive strength, considering the partial replacement of cement by BBA, presented the best percentage among those studied in the mortar with 10% replacement. In the mortar that was partially replaced the aggregate, there was a reduction in compressive strength when compared to the reference mortar. The dynamic modulus of elasticity was not significantly affected.