Per: iully da silva amaral pereira (uenf), José Alexandre Tostes Linhares Júnior (uenf), Renan Dias Couto (uenf), Larissa Mendonça Osorio Fonseca (uenf), Juliana Fadini Natalli (uenf), Afonso Rangel Garcez Azevedo (uenf), Sergio Neves Monteiro (ime)
Abstract:
The growing demand for inputs in construction and the inadequate management of agro-industrial waste has resulted in a significant environmental impact, considering that construction is among the most polluting sectors in the world, and agricultural waste directly affects the ecosystem. Lignocellulosic fibers from these wastes become an alternative for reinforcement in cementitious matrices. However, these fibers are hydrophilic, reducing adhesion between the fiber-matrix. To mitigate this characteristic, treatments were carried out to enable its incorporation into these matrices. Açaí and coconut fibers, treated with tannic acid, were analyzed in coating mortars. The mixture proportion was: 1;1;6;1.4 (cement; lime; sand; water), with addition of 3% fibers in relation to the mass of cement treated with 5% concentration of tannic acid, in addition to reference mortar (0%). Workability, penetration index, mass density and entrained air content were evaluated. The analyzes indicated a reduction in fluidity in mortars reinforced with fibers and lower density, which is considered favorable, since mortars with this aspect result in lighter structures. Therefore, mortars incorporated with açaí and coconut fibers have application potential, requiring additional studies of other parameters.