Mix Design Procedure for Alkali-Activated Slag Concrete Using Particle Packing Theory
Publication: Journal of Materials in Civil Engineering
Volume 30, Issue 6
Abstract
This paper presents a methodology for designing mix proportions for a targeted compressive strength of alkali-activated slag concrete (AASC) using particle packing theory. Very little information is available on a complete methodology in designing the AASC mix. Ground granulated blast-furnace slag is activated with sodium silicate–based and sodium hydroxide–based alkaline activator solution. Sodium hydroxide concentration, binder content, and the alkaline solution:binder ratio are taken as variables. The aggregates are proportioned using particle packing theory, resulting in fewer voids and a dense concrete mix which hinders the ability of external aggressive chemicals to migrate into the concrete. Results show that the sodium hydroxide concentration and alkaline solution:binder ratio are the most influential parameters on compressive strength and workability of AASC. This paper presents a mix design procedure for AASC with a detailed example.
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Acknowledgments
The authors are thankful for the support from all the faculty members of Civil Engineering Department, National Institute of Technology Warangal, India.
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©2018 American Society of Civil Engineers.
History
Received: Jan 11, 2017
Accepted: Nov 29, 2017
Published online: Apr 12, 2018
Published in print: Jun 1, 2018
Discussion open until: Sep 12, 2018
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