Resumen de Construction and demolition waste as raw material in pavements layers
Fernando Artur Nogueira Silva, Marcela Tavares de Araújo Silva, Joao Delgado, António Azevedo, Guilherme Cavalcanti Pereira
The proper management of demolition construction waste from the construction industry is an issue that has gained relevance over the last years in severalresearch centers around the world and, in this context, researches on the potential of using construction and demolition waste to execute pavement layers havebeen stood out. The paper presented results of a research performed to evaluate the characteristics of the material produced by a waste treatment/beneficiation industrial plant. Tests to verify the suitability of the material as pavement subbase material were performed according Brazilian code -grain-size distribution composition, maximum characteristic dimension, shape particle index (SPI), con-taminant percentage and sieving process. The results obtained indicated that the recycled aggregates investigated per-formed well in all the requirements of the reference standards used and only one correction,related to grain size distribu-tion, was performed using a sieving process. It is important to highlight that the tests and analyses must be performed constantly when forming each aggregate batch, since the recycled aggregates are usually quite heterogeneous, with char-acteristics that may vary depending on the type of work, construction materials used or period of the year.
