Characterisation and Life Cycle Assessment of Pervious Concrete with Recycled Concrete Aggregates

Crystals

AntonioE. Polisseni¹  ThaísM. Oliveira¹  Ricardo Mateus²  ElisabeteR. Teixeira²  Cláudia Jacinto²  AdilsonC. Paula Junior²  FabioM. Brum³ 

[1] Department of Civil Construction, Faculty of Engineering, Federal University of Juiz de Fora, 36036-900 Juiz de Fora, Brazil;Department of Civil Engineering, Institute for Sustainability and Innovation in Structural Engineering (ISISE), University of Minho, 4800-058 Guimarães, Portugal;Infrastructure Office (ProInfra), Federal University of Juiz de Fora, 36036-900 Juiz de Fora, Brazil;

关键词: pervious concrete;    recycled concrete aggregate;    construction and demolition waste;    permeability;    mechanical properties;    environmental assessment;   

DOI  :  10.3390/cryst11020209

来源: DOAJ

【 摘 要 】

The search for environmental preservation and conservation of natural resources gives rise to new concepts and viable technical solutions on the path to sustainable development. In this context, this study's main objective is to analyse the influence of recycled concrete aggregates (RCAs) on the development of pervious concrete, whose use as a floor covering represents an excellent device to mitigate the urban soil sealing phenomena. For this, mechanical and hydraulic tests were carried out, in addition to microstructural analyses and the assessment of its environmental performance. The results obtained were compared to reference studies also involving the incorporation of recycled aggregates. A pilot-scale case study was conducted, involving a parking space lined with pervious concrete moulded "in situ". In laboratory tests, permeability coefficients and mechanical strengths compatible with the literature and above the normative limit for light traffic were found. The case study demonstrated higher permeability than in the laboratory, but the flexural strength was lower, being indicated only for pedestrian traffic. The environmental assessment showed that the RCA represents a positive contribution to the environmental performance of pervious concrete. Still, attention should be given to the recycled aggregate transport distance between the concrete plant and the RCA treatment plant.

【 授权许可】

Unknown