The Complete Recycling of Waste Concrete to Produce Geopolymer Concrete

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4 Scopus citations

Abstract

This paper investigates complete recycling and utilization of waste concrete, both the aggregates and the fines from crushing, to produce new concrete through geopolymerization. Based on previous studies and considering the workability of the new geopolymer concrete (GPC), 25% waste concrete fines (WCF), and 75% class-F fly ash (FA) were used as the geopolymer cement source material, NaOH/Na2SiO3 solution as the alkaline activitor, and the aggregates (both coarse and fine) from waste concrete crushing as the aggregate. The research systematically studied the effect of different factors on the initial setting time and the 7-day unconfined compressive strength (UCS) of the GPC. Based on this study, it can be concluded that waste concrete can be completely recycled and used to produce new geopolymer concrete with required UCS values.

Original languageEnglish (US)
Pages (from-to)103-111
Number of pages9
JournalGeotechnical Special Publication
Volume2016-January
Issue number272 GSP
DOIs
StatePublished - 2016

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology

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