Avaliação de resíduos da construção civil na composição de materiais para reforço de subleito de pavimentos

Abstract

Building industry is one of the sectors that most generates waste and consumes non-renewable raw materials. Seeking a sustainable solution for this issue, it is proposed the use of construction and demolition waste (RCD) in flexible pavement layers, in order to replace natural materials by RCD. This work was developed based on granulometry, compaction and Californian Bearing Ratio laboratory tests in order to find acceptable values according to paving standards and recycled aggregates. Tests were carried out with soil-RCD mixtures of different proportions, in which analyzes physical characteristics and penetration resistance. From the tests, it was verified that the soil and RCD studied presented poorly graded and uniform physical characteristics, obtaining a bad CBR value. Thus, after analyzing the results, the assessed materials proved to be unsuitable for pavement subgrades reinforcement. For future work, it is recommended to use higher levels of RCD and tests of: abrasion resistance, absorption and characterization of mechanical behavior: simple compressive strength, traction resistance by diametral compression and resilience module.