Effect of active components on strength development in alkali-activated low calcium fly ash cements

Bhagath Singh, G V P and K V L, Subramaniam (2019) Effect of active components on strength development in alkali-activated low calcium fly ash cements. Journal of Sustainable Cement-Based Materials. pp. 1-19. ISSN 2165-0373

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Abstract

The compressive strength achieved in alkali-activated low-calcium fly ash depends on the total reactive oxide ratios in the activated system, the reactive alumina content in fly ash and the initial molarity of NaOH. The total reactive silica in the system is the reactive silica contributed by the fly ash and soluble silica from the alkaline solution. A minimum molarity of NaOH is required to ensure complete dissolution of the glassy phase present in fly ash. The maximum compressive strength depends on the amorphous reaction product content formed, which is determined by the reactive alumina content in the fly ash. The highest compressive strength is achieved for the ratio of the total reactive silica to sodium ratio in the activated system equal to 4.72 and lower. More Na is incorporated in the reaction product on increasing the Na2O content relative to the reactive oxides.

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IITH Creators:	IITH Creators ORCiD K V L, Subramaniam http://orcid.org/0000-0002-5995-0911
Item Type:	Article
Subjects:	Civil Engineering
Divisions:	Department of Civil Engineering
Depositing User:	Team Library
Date Deposited:	15 Feb 2019 03:59
Last Modified:	15 Feb 2019 03:59
URI:	http://raiithold.iith.ac.in/id/eprint/4812
Publisher URL:	http://doi.org/10.1080/21650373.2018.1520657
OA policy:	http://www.sherpa.ac.uk/romeo/issn/2165-0373/
Related URLs:	Google Scholar

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