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A comprehensive material testing program for characterizing concrete behaviors under dynamic loads
(2009)
Fly ash-based, ambient-cured geopolymer concretes for a round-robin durability testing program were designed and characterized. Optimum activator composition was determined based on the Chemical composition of the amorphous part of the fly ash. Fly ash content, water content, and grading curves of the aggregates were varied for the concretes. Characterization of the concretes involved flow diameter, air void content, density, compressive strength, and permeability. The workability of the concretes was notably sensitive to changes in the mix-design. The majority of strength development in the concretes occurred within the first 28 days of curing; concrete strengths reached up to 86 MPa after 56 days. Two concretes, both with sufficient workability, but significantly different grading curve, water content, strength and permeability were identified to be suitable for the round-robin testing program.