Influence of Ultra-Fine Particle-Type on Properties of Very High-Strength Concrete

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Title: Influence of Ultra-Fine Particle-Type on Properties of Very High-Strength Concrete

Author(s): S. Rols, M. Mbessa, J. Ambroise, and J. Pera

Publication: Special Publication

Volume: 186

Issue:

Appears on pages(s): 671-686

Keywords: mineral admixtures; shrinkage; strength; superplasticizers; workability

Date: 5/1/1999

Abstract:
Very-high strength concrete (>100 MPa) has been developed using different types of ultra-fine particles: silica fume, ground granulated blast furnace slag, metakaolin, and cristobalite. The effect of the type of ultra-fine particle on some engineering properties of concrete has been investigated: compressive strength, loss of workability and plastic shrinkage. The highest level of strength (120 MPa) was obtained using either 20% slag, or 10% metakaolin, in addition to cement. The workability was maintained for one hour when slag or cristobalite were presenting the mixture. The tests undertaken on plastic shrinkage pointed out that very-high strength concrete developed high plastic shrinkage, specially when pozzolans were used. The use of slag does not affect the plastic shrinkage.