MATEC Web Conf.
Volume 195, 2018The 4th International Conference on Rehabilitation and Maintenance in Civil Engineering (ICRMCE 2018)
|Number of page(s)||8|
|Published online||22 August 2018|
Microstructure and mechanical properties of FA/GGBS-based geopolymer
Department of Civil and Environmental Engineering, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, Japan
* Corresponding author: email@example.com
This study presents the microstructure and mechanical properties of geopolymer paste made from low-calcium fly ash (FA) and ground granulated blast-furnace slag (GGBS) through alkalination. The use of GGBS and FA is not only for sustainable construction but also for reducing the emission of CO2 due to the use of Portland cement. Different replacement ratios of GGBS to FA were used to determine the effect of GGBS presented to the compressive strength of geopolymer specimens. The alkaline activator solution used is a combination of sodium hydroxide (NaOH) 14 M and sodium silicate (Na2SiO3). A compressive strength test on cylindrical specimens (50 mm x 100 mm) at the ages of 7, 14, and 28 days was carried out. The results showed that the compressive strength increased with the increase of GGBS in the mixes (up to 100 MPa). Moreover, SEM-EDS, XRD, and TG-DTA characterization methods were conducted to investigate the microstructure, phase composition, and thermal stability of the geopolymer specimens respectively.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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