Total replacement of recycled aggregate and treated wastewater: concrete recycling in extremis

  • Mayanin Gisela Ramírez-Tenjhay National Autonomous University of Mexico
  • Alba Beatriz Vázquez-González National Autonomous University of Mexico
  • José Manuel Gómez-Soberón Polytechnic University of Catalonia
  • Francisca Guadalupe Cabrera-Covarrubias Polytechnic University of Catalonia
Keywords: recycled aggregates, recycled concrete, sustainable materials, treated wastewater

Abstract

Million tons of construction and demolition waste (CDW) are generated every year around the world, and most of them are not adequately disposed, generating significant pollution on water, soil and air. Additionally, the use of freshwater in industrial processes, such as the production of cement, concrete manufacturing and curing for newly-built structures; has damaged the health of our freshwater ecosystems, reducing their volume and hindering their natural cycle of renovation. Therefore, the incorporation of recycled aggregate (RA) and treated wastewater (TW) as substitutes for the usual aggregates (UA) and freshwater, could generate significant environmental benefits. In this research, a comparative analysis of the experimental results of the properties of fresh and hardened concrete with different replacement percentage of UA for RA, is presented; and as an innovation the use TW. The results show that, regardless of the replacement percentage and use of treated wastewater, a concrete with RA and TW (recycled concrete in extremis, CRiE) had a satisfactory and acceptable or equivalent performance, not differing significantly from the performance of conventional concrete (CC), confirming that the use of RA for concrete building is feasible.

DOI: http://dx.doi.org/10.5755/j01.sace.15.2.15464

Author Biographies

Mayanin Gisela Ramírez-Tenjhay, National Autonomous University of Mexico

MSc student

Civil and Geomatic Engineering Division

Faculty of Engineering

Alba Beatriz Vázquez-González, National Autonomous University of Mexico

Full time professor

Civil and Geomatic Engineering Division

Faculty of Engineering

 

José Manuel Gómez-Soberón, Polytechnic University of Catalonia

Full time professor

Department of Architectural Technology II

Polytechnic University of Catalonia

Francisca Guadalupe Cabrera-Covarrubias, Polytechnic University of Catalonia

PhD student

Barcelona School of Civil Engineering

Published
2016-10-04
Section
Articles