Additional Aging Effect after Carbonation Process of Fly Ash Based Eco-Materials

Abstract:

The purpose of this study is to enhance the mechanical strength of specimens containing fly ash from fluidized bed type boiler, which the recycling rate will be eventually increased. Specimens containing fly ash in a certain portion were made and aged for 3, 14, and 21 days. The carbonation process under the super critical condition was performed to enhance the mechanical property of specimens by filling the voids and cracks existing inside cement specimen with CaCO3 reactants. The additional aging effect after the supercritical carbonation process on mechanical strength of specimens was also investigated by comparing the compressive strength with and without 7 day extra aging. Carbonation under the supercritical condition and additional 7 day aging was very effective for enhancement of mechanical strength and compressive strength increased by 44%, which reached up to 88MPa.

• Periodical: Applied Mechanics and Materials (Volume 302)
• Pages: 61-65
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.302.61
• Online since: February 2013
• Authors: Yoo Taek Kim, Jun Young Park
• Keywords: Aging, Carbonation, Eco-Materials, Fly Ash (FA), Supercritical Condition

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