Title
Effect of Sodium Hydroxide Molarity on the Alkali-Activated Fly Ash and Granulated Slag Geopolymer Binders with Water Glass – Part I
Authors
H. H. M. Darweesh
Refractories, Ceramics and Building Materials Department, National Research Centre, Cairo, Egypt.
*Corresponding author E-mail address: hassandarweesh2000@yahoo.com
Article History
Publication details: Received: 07th March 2022; Revised: 25th May 2022; Accepted: 25th May 2022; Published: 06th June 2022
Cite this article
Darweesh H. H. M. Effect of Sodium Hydroxide Molarity on the Alkali-Activated Fly Ash and Granulated Slag Geopolymer Binders with Water Glass – Part I. Nano Prog., 2022, 4(7), 8-13.
Abstract
Physical and mechanical properties of the prepared geopolymers composed from granulated blast furnace slag and pulverized flay ash activated with sodium hydroxide and sodium silicates with different molarities of NaOH were investigated. Results showed that the bulk density, flexural and compressive strength improved and enhanced as the molarity of the activator increased till 10 M NaOH, while the total porosity as well as water absorption of the hardened specimens decreased. With any further increase in the molarity of the activator, all these characters were negatively affected, i.e. the water absorption and total porosity rein creased, whereas the bulk density, flexural and compressive strengths diminished. So, the optimum molarity of the activator is 10 M NaOH.
Keywords
Geopolymer; Activator; Molarity; Water Absorption; Porosity; Strength
