Preparation and Characterization of an Eco-Friendly Binder from Alkali-Activated Aluminosilicate Solid Industrial Wastes Containing CKD and GGBS
Publication: Journal of Materials in Civil Engineering
Volume 30, Issue 6
Abstract
This work aims to prepare an eco-friendly binder from alkali-activated aluminosilicate solid industrial wastes. Eco-friendly binders provide a solution to the present ecological problem of producing non-portland-cement binders. Cement kiln dust (CKD) and ground granulated blast-furnace slag (GGBS) by-products were used to prepare the binder from alkali-activated GGBS-CKD mixed with . The characteristics of the prepared binder were studied using different techniques such as FTIR, DTA/TGA, XRD, and SEM. The compressive strength and bulk density of alkali-activated GGBS-CKD binders increased with increasing CKD contents up to 20% mass (Mix D2), then decreased with the increase of CKD contents from 30 to 50% mass. The chemically combined water and combined slag content of activated GGBS-CKD increased with increasing CKD content up to 50% mass (Mix D4). Mix D2 (20% mass of CKD) is the optimum mix composition. (CH) and containing CKD disintegrated the aluminosilicate matrix of GGBS. CH acts as a ion source to accelerate the pozzolanic activity to form rigid spheres of the compact massive matrix of (N, C)–A–S–H gel having low porosity. In addition, CKD has higher alkali and content, which makes CKD an excellent activator to enhance the dissolution of GGBS to release silicate, aluminate, and/or aluminosilicate species and improve the alkali-activated network gel matrix formation.
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Acknowledgments
The authors extend their sincere appreciation to the Deanship of Scientific Research at the Al Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, Kingdom of Saudi Arabia, for its funding of this research through Research Group Project No. 351216.
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Journal of Materials in Civil Engineering
Volume 30 • Issue 6 • June 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: May 4, 2017
Accepted: Nov 21, 2017
Published online: Mar 28, 2018
Published in print: Jun 1, 2018
Discussion open until: Aug 28, 2018
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