Drying Shrinkage of Slag Blended Fly Ash Geopolymer Concrete Cured at Room Temperature

By P. Deb, P. Nath, P. Sarker. 2015

172 citations recorded by the source corpus.

Abstract Recent studies have shown that blending of ground granulated blast furnace slag (GGBFS) with low-calcium fly ash can have significant effects on the setting and early strength development of geopolymers cured at room temperature. This paper presents the shrinkage behaviour of geopolymer concrete mixtures in which class F fly ash was replaced with 10% or 20% GGBFS and the sodium silicate to sodium hydroxide (SS/SH) ratio was either 1.5 or 2.5. Shrinkage of 4 geopolymer and 1 ordinary Portland cement (OPC) concrete mixtures cured at room temperature were studied. Comparisons are made between the shrinkage behaviours of geopolymer concretes with different mixture proportions and those of the OPC concrete. It was found that shrinkage decreased with the increase of slag content and decrease of SS/SH ratio in geopolymer concrete cured at room temperature. The shrinkage of geopolymer concrete up to the age of 180 days was found to be comparable to that of OPC concrete of similar compressive strength. Thus, shrinkage of geopolymer concrete could be reduced to values within the limit recommended in the Australian Standards for normal OPC concrete.

Subfields: Civil and Structural Engineering

View Paper: https://www.semanticscholar.org/paper/e9e8f6cae066959d624a8ae1f510d37a5bbb6729

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Civil and Structural Engineering

Citations in the corpus

Workability and mechanical properties of alkali-activated fly ash-slag concrete cured at ambient temperature (2018, background): “5 the viscosity of AAFS mixture tends to increase resulting in a lower workability [2,3,45].”
Prediction of Compressive Strength of Geopolymer Concrete Using Entirely Steel Slag Aggregates: Novel Hybrid Artificial Intelligence Approaches (2019, methodology): “As an example, ground granulated blast-furnace slag (GGBFS) was blended with fly ash to fabricate GPC [14].”
Clean production and properties of geopolymer concrete; A review (2020, background): “Another study of 20% FA-based– and GGBS-based GeoPC with sodium silicate to sodium hydroxide (SS/SH) ratio revealed that shrinkage reduced with the rise of slag content and reduction in SS/SH ratio in GeoPC cured at room temperature, leading it to be comparable to that of normal concrete of similar ”