Role of Reactive Alumina and Reactive Oxide Ratios on Strength Development in Alakaline Activation of Low-Calcium Fly Ash

Singh, G V P B and K V L, Subramaniam (2017) Role of Reactive Alumina and Reactive Oxide Ratios on Strength Development in Alakaline Activation of Low-Calcium Fly Ash. In: 71st RILEM Annual Week & ICACMS, 03-08,September, 2017, Chennai, IIT Madras.

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Abstract

The role of reactive alumina and process varia bles such as sodium content and molarity on alkaline activation of different low calcium fly ashes are explored. Reactive alumina content of a fly ash is the key parameter which dete rmines the maximum compressive strength achieved from the alkaline activati on. The oxide ratios in the activated system, based on the total silica in the system consisting of the re active silica contributed by fly ash and the reactive alumina in fly ash are shown to provide consistent results for achieving the highest strength. A method called XRD-based direct decomposition is used to determine the unreacted glassy content and amorphous reaction product in the system. The strength gain in the system is directly related to a decrease in the unreacted fly ash glassy content and an increase in the reaction product content in the system.

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IITH Creators:
IITH CreatorsORCiD
K V L, Subramaniamhttp://orcid.org/0000-0002-5995-0911
Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Alkaline activation, Reactive Alumina, R eactive Silica, Molarity, Unreacted glassy content, geopolymer
Subjects: Civil Engineering
Divisions: Department of Civil Engineering
Depositing User: Team Library
Date Deposited: 10 Oct 2017 10:01
Last Modified: 10 Oct 2017 10:01
URI: http://raiith.iith.ac.in/id/eprint/3612
Publisher URL:
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