Influence of sodium hydroxide concentration on mechanical parameters of fly ash-based geopolymer

Author(s): Natalia Paszek, Marcin Górski
Paper category: Proceedings
Book title: SynerCrete’18: Interdisciplinary Approaches for Cement-based Materials and Structural Concrete: Synergizing Expertise and Bridging Scales of Space and Time Vol. 1 & 2
Editor(s): Miguel Azenha, Dirk Schlicke, Farid Benboudjema, Agnieszka Jędrzejewska
ISBN: 978-2-35158-202-2
e-ISBN: 978-2-35158-203-9
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 461-466
Total Pages: 6
Language : English

Abstract: Geopolymer is considered to be the new alternative to the ordinary Portland cement concrete. Some of its characteristics surpass OPC concrete parameters. Additionally, it should be emphasised that geopolymer is an environmentally friendly material since it is based mainly on wastes and the CO2 emission during its production is limited because of lack of the cement in the composition. Geopolymer parameters can be influenced by many factors. In the paper, the influence of NaOH concentration on the compressive and flexural strength of fly-ash based geopolymer is considered. Tests were carried out on right rectangular prism samples made from five mixtures containing fly ash, sodium silicate and sodium hydroxide of varying concentrations: 6, 8, 10, 12 and 14 mol/L. Compressive and flexural strength tests were performed after 7 days. Tests showed that compressive strength generally increases with the increase of NaOH concentration. No obvious dependence between flexural strength and NaOH concentration was found.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00