Performance of a High-Calcium Fly Ash in Roller Compacted Concrete


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Title: Performance of a High-Calcium Fly Ash in Roller Compacted Concrete

Author(s): J. Papayianni

Publication: Special Publication

Volume: 132


Appears on pages(s): 367-386

Keywords: calcium; compressive strength; fly ash; modulus of elasticity; roller compacted concrete; tensile strength; trial mixtures; Materials Research

Date: 5/1/1992

The results of a great number of trial mixes for mix design of roller compacted concrete (RCC) are presented. This particular RCC used a local fly ash, rich in lime and sulfates, which does not meet any existing specification. This fly ash's performance in concrete has been studied for some time at the Laboratory of Reinforced Concrete of Aristotle University of Thessaloniki. Recently, this fly ash was used in the construction of a large RCC dam in northern Greece. Measurements of the strength development and the elasticity of RCC mixes showed that the 80 percent (by weight) of the cementitious material could be substituted for this fly ash. Therefore, it was proven that in RCC mixes this fly ash is more effective than in conventional concrete.