Engineering Properties of Geopolymer Aggregate Concrete

Gunasekara, C, Setunge, S, Law, D, Willis, N and Burt, T 2018, 'Engineering Properties of Geopolymer Aggregate Concrete', Journal of Materials in Civil Engineering, vol. 30, no. 11, pp. 1-11.


Document type: Journal Article
Collection: Journal Articles

Title Engineering Properties of Geopolymer Aggregate Concrete
Author(s) Gunasekara, C
Setunge, S
Law, D
Willis, N
Burt, T
Year 2018
Journal name Journal of Materials in Civil Engineering
Volume number 30
Issue number 11
Start page 1
End page 11
Total pages 11
Publisher American Society of Civil Engineers
Abstract This paper reports a novel methodology to manufacture geopolymer coarse aggregate (GPA) using low calcium fly ash. The developed methodology is outlined together with a systematic experimental study undertaken to examine a viable manufacturing process for GPA production and the consideration of key mechanical properties and durability characteristics of GPA concrete up to 90days. GPA with a dry compressive strength in excess of 50MPa can be manufactured using a solid cylindrical mould with compression applied using a cylindrical piston. The key mechanical properties investigated for GPA concrete demonstrate a good correlation with the compressive strength to conventional crushed aggregate concrete. Concrete with mean compressive strength up to 37MPa can be produced using the innovative GPA concrete. The GPA concrete demonstrates low water and air permeability indicating that the material is a high-quality concrete with a dense pore structure. Overall, GPA investigated in this research shows potential as a lightweight coarse aggregate in portland cement concrete, with the significant additional benefit of addressing and reducing the environmental impact of fly ash from coal fired power generation.
Subject Construction Materials
Keyword(s) Fly ash
Geopolymer
Compressive strength
Aggregate
Mechanical properties
Permeation characteristics
DOI - identifier 10.1061/(ASCE)MT.1943-5533.0002501
Copyright notice © 2018 American Society of Civil Engineers
ISSN 0899-1561
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