Estudo da viabilidade do caroço do dendê moído aplicado como substituição parcial ao agregado natural na argamassa

Abstract

This work verifies the viability and performance of the mortar with partial replacement of natural sand by the milled palm, through the evaluations of the following properties: consistency index, density and air content incorporated in the fresh state, and absorption of water by capillarity , axial compressive strength and flexural tensile strength in the hardened state. The trace used as reference has the following components: cement, sand and water, while the other traces have partial replacement with: 5%, 15% and 30% of ground palm oil. All traces, references and substitutions were made in mass and volume, with variable / fixed water / cement factor, respectively. As for the consistency index, it was observed that with the increase of the substitution content it was necessary to increase the water / cement factor so that the mortar presented an adequate consistency for the mass traces. The density of the mortar decreased with the increase in the content of the partial substitutions, while the incorporated air content was larger the higher the percentage of partial replacement, the interrupted ratio in the partial replacement of 30%. For the absorption of water by capillarity, in both traces, it was verified that the reference traces and partial replacement with 5% of ground palm oil, presented the same classification next to the specific norm. Regarding the mechanical behavior, the results were considered satisfactory for the traits with 5%, 15% and 30% of partial replacement. Thus, it can be stated that the use of palm oil in the mortar is feasible and that the traces, with 5% and 15% partial replacement, presented satisfactory results in both fresh and hardened mortar states. However, the mortar with 15% partial replacement, in volume, is presented as the best option among the technical, economic and environmental aspects.