Correlations between mechanical properties of low calcium fly ash geopolymer concretes

Gunasekara, M, Setunge, S and Law, D 2017, 'Correlations between mechanical properties of low calcium fly ash geopolymer concretes', Journal of Materials in Civil Engineering, vol. 29, no. 9, 04017111, pp. 1-9.


Document type: Journal Article
Collection: Journal Articles

Title Correlations between mechanical properties of low calcium fly ash geopolymer concretes
Author(s) Gunasekara, M
Setunge, S
Law, D
Year 2017
Journal name Journal of Materials in Civil Engineering
Volume number 29
Issue number 9
Article Number 04017111
Start page 1
End page 9
Total pages 9
Publisher American Society of Civil Engineers
Abstract This paper reports the correlation between existing standards for concrete and the major mechanical properties of geopolymer concrete produced from a range of low-calcium, Class F fly ashes. The data were collected at set points over a 1-year period and include four different sources of fly ash used in the manufacturing of geopolymer concrete. New relationships between mechanical properties and compressive strength were derived using statistical regression analysis. The applicability of current relationships of portland cement (PC) concrete as specified in Australian standards and American Concrete Institute codes for geopolymer concrete have been critically examined. The results indicated that the flexural strength of geopolymer concrete is higher than those predicted using current design equations for PC concrete with a similar compressive strength. However, the splitting tensile strength of geopolymer concrete is comparable to that predicted using the current design equation for PC concrete with similar compressive strength. It was also observed that the ACI 363 R equation significantly overestimates the splitting tensile strength of geopolymer concrete. Similarly, AS 3600 overvalues the elastic modulus of geopolymer concrete. Both of these overestimations may be critical when compressive strength is below 40 MPa.
Subject Construction Materials
Keyword(s) Geopolymer
Fly ash
Compressive strength
Mechanical properties
Correlation
DOI - identifier 10.1061/(ASCE)MT.1943-5533.0001916
Copyright notice © 2017 American Society of Civil Engineers
ISSN 1943-5533
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 6 times in Thomson Reuters Web of Science Article | Citations
Altmetric details:
Access Statistics: 105 Abstract Views  -  Detailed Statistics
Created: Wed, 03 May 2017, 08:06:00 EST by Catalyst Administrator
© 2014 RMIT Research Repository • Powered by Fez SoftwareContact us