Open AccessEffect of various commercial of Na2SiO3 on compressive strength of Fly ash-based alkaline activated mortar
Author(s) -
Otman M. M. Elbasir,
M.J.A. Mijarsh,
Megat Azmi Megat Johari,
Mohamed O. M. Mashri,
Rahmi Karolina,
Zainal Arifin Ahmad
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/801/1/012078
Subject(s) - fly ash , mortar , compressive strength , fourier transform infrared spectroscopy , molar ratio , microstructure , materials science , nuclear chemistry , chemistry , composite material , chemical engineering , catalysis , organic chemistry , engineering
This study aimed to assesses the effect of various commercial Na 2 SiO 3 on the compressive strength (CS) of alkaline activated fly ash mortar (AAFM). The three mixture of alkaline activated mortar (AAM) C1, C2 and C3 were prepared from the source material of fly ash and alkaline activator solution (AAS). The initial AAS was comprised of NaOH (10M) and various grade of Na 2 SiO 3 . The various grades of Na2SiO3 were characterized by their SiO 2 /Na 2 O molar ratio of 2.0, 2.2, and 3.3, respectively. The sample from each mixture was characterized based on the CS and microstructure changes using useful tools of XRD and FTIR analysis. The results obtained indicated that the highest CS achieved among the three mixtures were 48.23MPa of mixture C2 prepared with SiO 2 /Na 2 O molar ratio of 2.2. This was mainly due to higher binder formation (N-A-S-H gel type) and a higher rate of reaction of the main source material. This result is in line with XRD and FTIR analysis results finding.