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General Information
    • ISSN: 1793-8236 (Online)
    • Abbreviated Title Int. J. Eng. Technol.
    • Frequency:  Quarterly 
    • DOI: 10.7763/IJET
    • Executive Editor: Ms.Yoyo Y. Zhou
    • Abstracting/ Indexing: Chemical Abstracts Services (CAS) EBSCO, Google Scholar, Ulrich Periodicals Directory, Crossref, ProQuest, Index CopernicusEI (INSPEC, IET).
    • E-mail: ijet@vip.163.com
Editor-in-chief
Prof. T. Hikmet Karakoc
Anadolu University, Faculty of Aeronautics and Astronautics, Turkey

IJET 2015 Vol.7(1): 59-64 ISSN: 1793-8236
DOI: 10.7763/IJET.2015.V7.767

Mechanical and Microstructural Characterization of Alkali-Activated Materials Based on Fly Ash and Slag

Maochieh Chi, Yenchun Liu, and Ran Huang
Abstract—This study investigates the mechanical and microstructural characterization of alkali-activated fly ash/slag (AAFS) mortars with various ratios of fly ash to slag. The liquid/binder ratios of 0.35, 0.5 and 0.65 are considered for the AAFS mortars. 4% Sodium oxide (Na2O) concentration of cementitious material weight in mixture and liquid sodium silicate with modulus ratio (mass ratio of SiO2 to Na2O) of 1 were used as alkaline activators to alkali-activate various fly ash/slag ratios. Compressive strength test, water absorption test, drying shrinkage test, scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis were conducted. Test results reveal that both fly ash/slag ratio and the liquid/binder ratio are two significant factors influencing the mechanical and microstructural characterization of AAFS mortars. The hydration products of AAFS mortars are mainly amorphous alkaline aluminosilicate and low-crystalline calcium silicate hydrate gel.

Index Terms—Alkali-activated fly ash/slag, liquid/binder ratio, scanning electron microscopy (SEM), X-ray diffraction (XRD).

Maochieh Chi is with the Department of Fire Science, WuFeng University, Chiayi County, 621 Taiwan (e-mail: jackchi@wfu.edu.tw). Yenchun Liu is with the Graduate School of Opto-Mechatronics and Materials, WuFeng University, Chiayi County, 621 Taiwan (e-mail: blliu@wfu.edu.tw).
Ran Huang is with the Department of Harbour and River Engineering, National Taiwan Ocean University, Keelung, 200 Taiwan (e-mail: ranhuang@mail.ntou.edu.tw).

[PDF]

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.

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