Strength and Setting Times of Low Calcium Fly Ash-based Geopolymer Mortar

By D. Hardjito, Chua Chung Cheak, C. H. Ing. 2008

268 citations recorded by the source corpus.

Geopolymer is a novel binding material produced from the reaction of fly ash with an alkaline solution. In Geopolymer mortar, Portland cement is not utilized at all. In this research, the influence of various parameters on the short term engineering properties of fresh and hardened low-calcium fly ash-based Geopolymer mortar were studied. Tests were carried out on 50 x 50 x 50mm cube Geopolymer mortar specimens. The test results revealed that as the concentration of alkaline activator increases, the compressive strength of Geopolymer mortar also increases. Specimens cured at temperature of 65 o C for 1 day showed the highest 28 days compressive strength. The mass ratio of activator/fly ash of 0.4 produced the highest 28 days compressive strength for the specimen. The obtained compressive strength was in the range of 1.6MPa – 20MPa.

Subfields: Civil and Structural Engineering

View Paper: https://www.semanticscholar.org/paper/1dd852e2be6d2a91ee5be93195a0a64a53c02966

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

High-Strength Geopolymer Using Fine High-Calcium Fly Ash (2011, background): “For low-calcium (Class F) fly ash, it has been observed that at room temperature, a geopolymer paste may not set on the first day (Hardjito et al. 2008).”
A Review of Recent Developments and Advances in Eco-Friendly Geopolymer Concrete (2020, background): “Unlikely, it was found that for FA-based geopoly er fi ff t in Figure 27 [162,164,165].”
Clean production and properties of geopolymer concrete; A review (2020, methodology): “To examine the microstructure of OPC blended with FA-based geopolymers, two paste mixes that contained OPC as a substitute for 10% and 50% of the total binder were prepared (Adam, 2009; D Hardjito et al., 2005; Hardjito et al., 2008).”
EFFECT OF SODIUM HYDROXIDE CONCENTRATION ON FRESH PROPERTIES AND COMPRESSIVE STRENGTH OF SELF-COMPACTING GEOPOLYMER CONCRETE (2013, background): “[12] have reported that alkaline concentration was proportionate to the compressive strength of geopolymer mortar.”
Effect of Solids-To-Liquids, Na2SiO3-To-NaOH and Curing Temperature on the Palm Oil Boiler Ash (Si + Ca) Geopolymerisation System (2015, background): “The high content of alkaline activator produced excessive OH− that was left in the system, thus weakening the geopolymer structure [17].”