Effect of Portland Cement Content on Compressive Strength and Elastic Modulus of High-calcium Fly Ash Geopolymer Mortar Containing Various Type of Alkali Solution

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Published: Apr 24, 2020
Keywords:
High-Calcium Fly Ash Geopolymer Portland Cement Alkali Solution Types Compressive Strength Modulus of Elasticity

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Khattiya Chompoovong
Sustainable Construction Material and Technology Research Unit, Department of Civil Engineering, Faculty of Engineering and Architecture, Rajamangala University of Technology Isan, Nakhon Ratchasima
Tanakorn Phoo-ngernkham
Sustainable Construction Material and Technology Research Unit, Department of Civil Engineering, Faculty of Engineering and Architecture, Rajamangala University of Technology Isan, Nakhon Ratchasima
Satakhun Detphan
Sustainable Construction Material and Technology Research Unit, Department of Civil Engineering, Faculty of Engineering and Architecture, Rajamangala University of Technology Isan, Nakhon Ratchasima
Chudapak Detphan
Sustainable Construction Material and Technology Research Unit, Department of Civil Engineering, Faculty of Engineering and Architecture, Rajamangala University of Technology Isan, Nakhon Ratchasima
Sakonwan Hanjitsuwan
Program of Civil Technology, Faculty of Industrial Technology, Lampang Rajabhat University, Lampang
Prinya Chindaprasirt
Sustainable Infrastructure Research and Development Center, Department of Civil Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen

Abstract

This article aims to study the effect of alkaline solution types on compressive strength and elastic modulus of high-calcium fly ash (FA) geopolymer containing Portland cement (PC). FA was replaced by PC at the dosages of 0%, 5%, 10%, 15%, and 20% by weight of the binder. Three types of alkaline solutions viz., sodium hydroxide solution (NH), sodium silicate solution (WG), and NH plus WG solution (NHWG) were used as the liquid portion in the mixture. The compressive strength and elastic modulus of highcalcium FA geopolymer mortar were investigated. Test results indicated that the use of PC to replace FA could enhance the compressive strength and elastic modulus of high-calcium FA geopolymer mortar. The compressive strength of high-calcium FA geopolymer mortar depended on the types of source materials and alkali activators. The increase in PC content enhanced the compressive strength and elastic modulus of high-calcium FA geopolymer mortar. Finally, the use of NHWG showed the highest compressive strength of high-calcium FA geopolymer mortar containing PC.

Article Details

Issue
Vol. 30 No. 4 (2020): October-December, 2020
Section
Engineering Research Articles

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