doi: 10.7763/IJET.2015.V7.767
Mechanical and Microstructural Characterization of Alkali-Activated Materials Based on Fly Ash and Slag
Maochieh Chi
1
,
Yenchun Liu
2
,
Ran Huang
3
- 1 the Department of Fire Science, WuFeng
- 2 the Graduate School of Opto-Mechatronics and
- 3 the Department of Harbour and River Engineering
Abstract
This study investigates the mechanical andmicrostructural characterization of alkali-activated fly ash/slag(AAFS) mortars with various ratios of fly ash to slag. Theliquid/binder ratios of 0.35, 0.5 and 0.65 are considered for theAAFS mortars. 4% Sodium oxide (Na2O) concentration ofcementitious material weight in mixture and liquid sodiumsilicate with modulus ratio (mass ratio of SiO2 to Na2O) of 1were used as alkaline activators to alkali-activate various flyash/slag ratios. Compressive strength test, water absorption test,drying shrinkage test, scanning electron microscopy (SEM) andX-ray diffraction (XRD) analysis were conducted. Test resultsreveal that both fly ash/slag ratio and the liquid/binder ratio aretwo significant factors influencing the mechanical andmicrostructural characterization of AAFS mortars. Thehydration products of AAFS mortars are mainly amorphousalkaline aluminosilicate and low-crystalline calcium silicatehydrate gel.
Keywords
- Alkali-activated fly ash/slag
- liquid/binderratio
- scanning electron microscopy (SEM)
- X-ray diffraction(XRD)
How to Cite
Maochieh Chi, Yenchun Liu, and Ran Huang, "Mechanical and Microstructural Characterization of Alkali-Activated Materials Based on Fly Ash and Slag," International Journal of Engineering and Technology, vol. 7, no. 1, pp. 59-64, 2015. https://doi.org/ 10.7763/IJET.2015.V7.767
Copyright & License
Copyright © 2015 by the authors. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).