Effect of the Combined Using of Fly Ash and Granulated Blast Furnace Slag on Properties of Cementless Alkali-Activated Mortar

Abstract:

This paper examines the effects of the mixture ratio of fly ash/slag, the type of alkaline activators and curing conditions on the workability, compressive strength and microstructure of cementless alkali-activated mortar. The investigation showed that the mixture ratio of fly ash/slag and the type of alkaline activator have significant influence on the workability and strength, whereas the curing temperature has relatively poor effect. An alkali-activated mortar using a binder composed of 50% of fly ash and 50% of granulated blast furnace slag and alkaline activator made of 9M NaOH and sodium silicate in proportion of 1:1 is seen to be able to develop a compressive strength of 65 MPa at age of 28 days even when cured at ambient temperature of 20°C.

• Periodical: Advanced Materials Research (Volumes 287-290)
• Pages: 916-921
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.287-290.916
• Online since: July 2011
• Authors: Kyung Taek Koh, Gum Sung Ryu, Si Hwan Kim, Jang Hwa Lee
• Keywords: Cementless Alkali-Activated Mortar, Compressive Strength, Curing, Fly Ash (FA), Granulated Blast-Furnace Slag, Microstructure, Workability

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