Utilização de resíduo de construção civil como alternativa para solo em aterros

Abstract

Civil Construction has a great part in the Brazilian economy. However, it is also responsible for a great part of the waste generated. There are laws that rule the disposal of Construction and Demolition Waste (C&DW), demanding that the materials be trialed, reused and recycled, thus avoiding its final disposal into landfills. Research proves the efficiency of C&DW used in mortar, concrete, bricks, grout, and pavements, to name a few. Besides, the use of Recycled Aggregates (RA) in Civil Construction is standardized in Brazil and several other countries. In the global scenario, Holland, Denmark, Germany and Switzerland are great examples in reusing and recycling C&DW. This study aimed to evaluate if the Ceramic C&DW has the minimum conditions to be used as an alternative material for foundation embankments. For the analysis, the collection and characterization of the material, and then a numerical simulation of an embankment were carried out. The results were compared with other numerical simulations carried out with a local soil or rock dust for the embankment. From such comparison, there was not a significant difference observed in the maximum absolute vertical displacement, indicating that for geotechnical purpose, all three materials are suitable for application as embankments. From a literature review, it has been concluded that the RA presents benefits when incorporated into the soil for planting, because it works as a conditioner for water holding for the plants. Lastly, it has been verified that, besides the good performance of the material in the previous analyses, there is also the possibility of an economic advantage in using RA, since there are no costs for C&DW disposal and purchase of a filling material.