Surface treatment on recycled coarse aggregates with nanomaterials

Hongru Zhang, Yuxi Zhao*, Tao Meng, Surendra P Shah

*Corresponding author for this work

Research output: Contribution to journalArticle

28 Scopus citations

Abstract

Surface treatment, using two slurries containing nanomaterials, was applied to recycled aggregate (RA). Experimental studies were conducted (1) to compare properties of RA before and after the surface treatment; and (2) to examine the modification effects of the surface treatment with nanomaterials on the microstructure and macroproperties of recycled aggregate concrete (RAC). The nanoindentation technique was used to achieve elastic modulus of different interface transition zones (ITZs) and old and new mortars in RAC. Test results show that both nanoslurries enhanced new ITZs between the old and new cement mortars. Although they did not work on old ITZs between the virgin aggregate and the old cement mortar, old mortars were surface strengthened. It is also proved that properties of both RA and RAC on the macroscale were improved by the surface treatment using nanomaterials.

Original languageEnglish (US)
Article number04015094
JournalJournal of Materials in Civil Engineering
Volume28
Issue number2
DOIs
StatePublished - Feb 1 2016

Keywords

  • Concrete aggregates
  • Interfaces
  • Nanotechnology
  • Recycling

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)
  • Mechanics of Materials

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