Durability of Fly Ash Concrete in the Marine Environmentby S. K. Lee, Florida Atlantic Univ, United States,
D. V. Reddy, Florida Atlantic Univ, United States,
W. H. Hartt, Florida Atlantic Univ, United States,
M. Arockiasamy, Florida Atlantic Univ, United States,
Abstract: This paper presents the experimental investigation of durability of air-entrained fly ash concrete in the marine environment. The findings indicate that the deterioration rate of durability parameters, such as compressive strength, weight loss, and dynamic modulus of elasticity, due to 450 wetting and drying cycles exposure (accelerated durability testing), was inversely proportional to the amount of fly ash replacement. On the other hand, tensile strength properties, such as modulus of rupture and fracture toughness, were independent of fly ash replacement, but increased with the period of accelerated testing. Based on acoustic emission (AE) measurements, unstable crack propagation was found to start at 93-97% maximum load during the fracture toughness tests.
Subject Headings: Fly ash | Ultimate strength | Cracking | Material tests | Seas and oceans | Cyclic strength | Toughness
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