Use of fibers of the mescope and açaí as a component of sandasphalt for paving in the city of Manaus / AM

Abstract

The importance of natural fibers as additives or reinforcements for polymer products has increased significantly in recent decades, due to factors such as the high price of synthetic fibers and the increasing search for low-cost materials from renewable sources. In addition, they must possess good mechanical and thermal properties, and that do not cause environmental damages. Thus, the objective of this work is to study the use of acaí mesocarp and core fibers as a component of sand blasting with sands of construction and demolition waste for paving in the city of Manaus-AM. Thermogravimetric analyzes and mechanical tests (DNIT 136 / 2010ME and ASTM D4123 / AASHTO TP-31-96) were performed as well as the characterization of the fibers and sand-asphalt mixtures. By means of this research, a higher aggregate-binder interaction was obtained by the thick coating of the mineral aggregate surfaces, due to the absorption of higher levels of 50/70 petroleum asphalt cement. Composites reinforced with natural açaí fiber presented good mechanical properties. Therefore, açaí fibers, available at zero cost, can be applied as reinforcement of cementitious matrices, providing a good mechanical performance and reducing the cost of the final product, due to the value of the fibers only to be processed. Manual and inserted in a social context.