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Effect of the Sodium Silicate Modulus and Slag Content on Fresh and Hardened Properties of Alkali-Activated Fly Ash/Slag
Open AccessArticle

Effect of Ordinary Portland Cement and Water Glass on the Properties of Alkali Activated Fly Ash Concrete

Faculty of Civil Engineering and Architecture, Kaunas University of Technology, Studentų g. 48, Kaunas 51367, Lithuania
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Minerals 2020, 10(1), 40; https://doi.org/10.3390/min10010040
Received: 11 November 2019 / Revised: 23 December 2019 / Accepted: 24 December 2019 / Published: 31 December 2019
(This article belongs to the Special Issue Alkali Activated Materials: Advances, Innovations, Future Trends)
This research presents the influence of ordinary Portland cement (OPC) and/or water glass addition on fly ash alkali-activated mortar and concrete. The results show that fly ash (FA) concrete activated with a NaOH solution and water glass mixture had better resistance to freeze and thaw, carbonation, alkali-silica reaction (ASR) and developed higher compressive strength and static elastic modulus compared with the FA concrete activated only with an NaOH solution. The addition of OPC contributes to the development of a denser microstructure of alkali activated concrete (AAC) samples. In the presence of water glass and OPC, the compressive strength (52.60 MPa) of the samples increased more than two times as compared with the reference sample (21.36 MPa) without OPC and water glass. The combination of OPC and water glass showed the increased strength and enhanced durability of AAC. The samples were more resistant to freeze and thaw, ASR, and carbonation. View Full-Text
Keywords: alkali-activated concrete; fly ash; durability; compressive strength; ordinary Portland cement; industrial waste alkali-activated concrete; fly ash; durability; compressive strength; ordinary Portland cement; industrial waste
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Bocullo, V.; Vaičiukynienė, D.; Gečys, R.; Daukšys, M. Effect of Ordinary Portland Cement and Water Glass on the Properties of Alkali Activated Fly Ash Concrete. Minerals 2020, 10, 40.

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