Effect of copper slag addition on mechanical behavior of asphalt mixes containing reclaimed asphalt pavement

A.C. Raposeiras, A. Vargas-Cerón, D. Movilla-Quesada, D. Castro-Fresno

Research output: Contribution to journalArticle

15 Citations (Scopus)
11 Downloads (Pure)

Abstract

Annually, copper production and refining processes of generate large volumes of copper slag, and the disposal of this waste remains a major economic and environmental problem. This annual production causes an increase in the number and volume of landfills, as well as the quantity of slag that backs up landfills, it also produces leachates which contain metals such as Cu, Pb, Hg and SO2. In this research, friction and cohesive qualities of copper slag are exploited, in order to incorporate this slag as aggregate in asphalt mixes containing Reclaimed Asphalt Pavement (RAP). Results demonstrate that the use of copper slag in an addition percentage of 35% is favorable, because flow values increase and stability values decrease. The Marshall Quotient is reduced up to 27%, improving the performance of mixes with RAP and obtaining behavior similar to a traditional mixture. This improvement is also reflected in an 8% increase in the indirect tensile strength, which stands the use of copper slag as a solution in RAP applications with more demanding tensile and fatigue requirements.
Original languageEnglish
Pages (from-to)268-276
Number of pages9
JournalConstruction and Building Materials
Volume119
Early online date18 May 2016
DOIs
Publication statusPublished - 30 Aug 2016
Externally publishedYes

Bibliographical note

NOTICE: this is the author’s version of a work that was accepted for publication in Construction and Building Materials. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Construction and Building Materials, 119, (2016)
DOI: 10.1016/j.conbuildmat.2016.05.081

© 2016, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

Keywords

  • Copper slag
  • Asphalt concrete
  • Reclaimed asphalt pavement
  • Marshall Quotient
  • Indirect tensile strength
  • Resilient modulus

Fingerprint Dive into the research topics of 'Effect of copper slag addition on mechanical behavior of asphalt mixes containing reclaimed asphalt pavement'. Together they form a unique fingerprint.

  • Cite this