Chemical aspects related to using recycled geopolymers as an aggregate

Research output: Chapter in Book/Report/Conference proceedingConference contribution

54 Downloads (Pure)

Abstract

Geopolymer cements are alternative binders for concrete with low CO2 footprint and distinct chemical composition. They consist of aluminosilicate macromolecules and have a highly alkaline matrix due to the activating solutions used for their production. This paper is based on a study examining the recyclability of fly ash-slag based geopolymer paste as fine recycled concrete aggregate (RCA) in Portland cement and geopolymer mortars. Given the intrinsic structure of geopolymers, leaching of chemical substances from the RCA into the new paste was considered possible. SEM images and elemental mapping of the hardened mortars were used to evaluate the effect of RA. The potential of alkali silica reaction occurrence and the effect of RA extract on the initial setting time of cement were examined.
Original languageEnglish
Title of host publication36th Cement and Concrete Science conference
EditorsGary Perkins
Place of PublicationCardiff
PublisherCementitious Materials Group, Institute of Materials, Minerals and Mining
ISBN (Print)1-86125-175-0, 978-1-86125-175-6
Publication statusPublished - 5 Sep 2016
Event36th Cement and Concrete Science Conference - Welsh Academy of Music and Drama, Cardiff University , Cardiff, UK United Kingdom
Duration: 5 Sep 20166 Oct 2016

Conference

Conference36th Cement and Concrete Science Conference
Abbreviated title36CCS
CountryUK United Kingdom
CityCardiff
Period5/09/166/10/16

Fingerprint

Geopolymers
cement
mortar
Concrete aggregates
Ointments
Mortar
chemical substance
Cements
aluminosilicate
Coal Ash
slag
footprint
fly ash
Aluminosilicates
Alkalies
Portland cement
silica
chemical composition
scanning electron microscopy
Macromolecules

Keywords

  • geopolymer
  • recycled aggregates
  • Scanning electron microscopy (SEM)
  • Elemental analysis
  • alkali aggregate reactions

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Materials Science (miscellaneous)
  • Waste Management and Disposal
  • Building and Construction

Cite this

Chaliasou, N., Heath, A., & Paine, K. (2016). Chemical aspects related to using recycled geopolymers as an aggregate. In G. Perkins (Ed.), 36th Cement and Concrete Science conference [Paper Number 10] Cardiff: Cementitious Materials Group, Institute of Materials, Minerals and Mining.

Chemical aspects related to using recycled geopolymers as an aggregate. / Chaliasou, Napoleana; Heath, Andrew; Paine, Kevin.

36th Cement and Concrete Science conference. ed. / Gary Perkins. Cardiff : Cementitious Materials Group, Institute of Materials, Minerals and Mining, 2016. Paper Number 10.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Chaliasou, N, Heath, A & Paine, K 2016, Chemical aspects related to using recycled geopolymers as an aggregate. in G Perkins (ed.), 36th Cement and Concrete Science conference., Paper Number 10, Cementitious Materials Group, Institute of Materials, Minerals and Mining, Cardiff, 36th Cement and Concrete Science Conference, Cardiff, UK United Kingdom, 5/09/16.
Chaliasou N, Heath A, Paine K. Chemical aspects related to using recycled geopolymers as an aggregate. In Perkins G, editor, 36th Cement and Concrete Science conference. Cardiff: Cementitious Materials Group, Institute of Materials, Minerals and Mining. 2016. Paper Number 10
Chaliasou, Napoleana ; Heath, Andrew ; Paine, Kevin. / Chemical aspects related to using recycled geopolymers as an aggregate. 36th Cement and Concrete Science conference. editor / Gary Perkins. Cardiff : Cementitious Materials Group, Institute of Materials, Minerals and Mining, 2016.
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