Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8106769 | Journal of Cleaner Production | 2014 | 10 Pages |
Abstract
This article discusses the findings of a feasibility study on the partial replacement of natural coarse aggregate with a poor quality recycled aggregate from construction and demolition waste in the manufacture of concrete of 30Â MPa strength grade. The mixed recycled aggregate used had a high asphalt and floating material content. Workability, density, compressive and tensile strength, water absorption and sorptivity were studied in a series of concretes containing 25 or 50% of the recycled aggregate with and without floating materials. The results showed that using up to 50% of the recycled aggregate had no adverse effects on fresh concrete workability. Most of the physical and mechanical properties of hardened concrete (strength, density, sorptivity and water absorption) were observed to decline with rising recycled aggregate replacement ratios and floating particle content. Overall, considering the strength and other properties achieved, the concretes containing the mixed recycled aggregates studied were found to be apt for housing construction. The technical, economic and environmental improvements stemming from the potential replacement of natural coarse aggregate with such recycled construction and demolition waste would contributed to the sustainability of the construction industry.
Related Topics
Physical Sciences and Engineering
Energy
Renewable Energy, Sustainability and the Environment
Authors
César Medina, Wenzhong Zhu, Torsten Howind, MarÃa Isabel Sánchez de Rojas, Moisés FrÃas,