Effect of transient creep on compressive strength of geopolymer concrete for elevated temperature exposure

By Z. Pan, J. Sanjayan, F. Collins. 2014

152 citations recorded by the source corpus.

Abstract The strength and transient creep of geopolymer and ordinary Portland cement (OPC)-based material (paste and concrete) were compared at elevated temperatures up to 550 °C. The strength properties were determined using an unstressed hot strength test and unstressed residual strength test for paste and concrete, respectively. At 550 °C, compared with the original strength, the strength of geopolymer was increased by 192% while the strength of OPC paste showed little change. However, after exposure to 550 °C, the residual strength percentage of both geopolymer and OPC concretes was similar. Transient creep data show that geopolymer had little change in transitional thermal creep (TTc) between 250 and 550 °C while OPC paste developed significant TTc in this temperature range. In comparison with OPC concrete, a higher strength loss of geopolymer concrete is thus believed to be due to the absence of TTc to accommodate nonuniform deformation during thermal exposure.

Subfields: Civil and Structural Engineering

View Paper: https://www.semanticscholar.org/paper/9dcbfa6ab189b1aaa646cc3310b0010c791e128c

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In Civil and Structural Engineering

1. I. Luhar
2. Salmabanu Luhar
3. A. Castel
4. D. Nicolaides
5. S. Foster
6. J. Liggat
7. Leung Tang
8. Jason Fung

Citations in the corpus

• Enhanced properties of graphene/fly ash geopolymeric composite cement (2015, background): “[6], geopolymers 44 are inherently fire resistant due their polymeric-silicon-oxygen-aluminum framework.”
• Effect of elevated temperature on alkali-activated geopolymeric binders compared to portland cement-based binders (2016, background): “[20] that showed a fly ash paste exposed to 550 °C had a compressive strength increase of 192% over ambient compressive strengths.”
• Creep and drying shrinkage of a blended slag and low calcium fly ash geopolymer Concrete (2016, background): “[25] recently reported that the free moisture content of geopolymer is similar to that of OPC concrete which is in the order of 5–8 % as can be seen from TGA when heated to about 110 C.”
• Fire Resistance Behaviour of Geopolymer Concrete: An Overview (2021, background): “[107] have accounted for thermo-gravimetric and differential thermal analyses upshots.”