Degradation assessment of recycled aggregates from Construction and Demolition Waste through wet-dry cycles

• Type: Article in International Conference Proceedings Book
• Date: 2019-09

Authors

Castorina Silva Vieira (Author) FEUP; Paulo Miguel P. Pereira (Author) FEUP; Maria de Lurdes Lopes (Author) FEUP

Conference proceedings International

Title: 17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019 - Proceedings

Pages: 1-8

Indexing

Scopus - 3 Citations

Associated Projects

CDW_LongTerm - Valorização de Resíduos de Construção e Demolição em aterros reforçados com geossintéticos. Estudo do comportamento a longo prazo

Other information

Authenticus ID: P-00W-9A4

Abstract (EN): In recent years, several studies and applications of recycled aggregates coming from Construc-tion and Demolition Waste (CDW) have been carried out, but the knowledge related to the long-term behaviour of these alternative materials is still fairly limited. The breakage of CDW particles is commonly pointed out as an issue for the use of these recycled materials. This paper studies the change of the particle size distribution of a recycled aggregate coming from CDW due to degradation agents simulated trough 10 wet-dry cycles under controlled conditions. The effects on particle density, water absorption, shape index, flakiness index, sand equivalent value, Los Angeles abrasion, aggregate crushing value, water-soluble sulphate content are assessed. Wet-Dry cycles have degraded the mixed recycled aggregate, increasing the amount of particles with small di-mensions, however the changes in its mechanical and physical behaviour are not very significant. LA abrasion loss of this recycled aggregate is high making its use on unbound pavement layers difficult.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8