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http://dx.doi.org/10.7844/kirr.2012.21.3.028

Analysis of Mechanical Properties and Micro structure of Fly Ash Based Alkali-activated Mortar  

Ryu, Gum-Sung (Structural Engineering & Bridges Research Division Infrastructure Research Department, KICT)
Koh, Kyung-Taek (Structural Engineering & Bridges Research Division Infrastructure Research Department, KICT)
Chung, Young-Soo (Dept. of Civil & Environmental Eng. Chung-Ang Univ.)
Publication Information
Resources Recycling / v.21, no.3, 2012 , pp. 28-38 More about this Journal
Abstract
The purpose of this paper is to develop the alkali-activated concrete which uses 100% fly ash as a binder without any cement. The compressive strength of the mortar was examined depending on the chemical change in alkali-activator through SEM and SEM/EDS observations and the XRD analysis. It was found from the test that the higher molar concentration induced the greater effect on the initial strength, and that $Si^{4+}$ and $Al^{3+}$ were eluted relative to the compressive strength of mortar. In addition, it was confirmed that Al and Si were determined to be most influential ingredients on the microstructural development of the mortar, and that the different ingredient of the activator was almost no change in solidity from the XRD analysis.
Keywords
Fly ash; Alkali-activator; Geopolymer; Strength development; Hardening mechanism;
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