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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Influence of Mineral Admixtures on the Autogenous Shrinkage and Porosity of High-Strength Concrete
Author(s): M. S. Konsta-Gdoutos, J. K. Dattatreya, and S. P. Shah
Publication: Special Publication
Appears on pages(s): 227-238
Keywords: autogenous shrinkage; durability; high performance concrete; porosity
Abstract:This paper illustrates the effect of silica fume, ultra fine fly ash and ground gran- ulated blast furnace slag on the compressive strength, shrinkage and the development of pore structure of high performance concrete. Shrinkage measurements were carried out using a modified version of ASTM C-341, as proposed by Tarawa and Mirawaya. The experimental data obtained demonstrates how the material composition, the water to binder ratio, and the distribution of pore volume influence strength, autogenous, drying and total shrinkage. High strength mixtures containing ultra fine fly ash, silica fume and ordinary Portland cement exhibited an increased drying shrinkage rate, when compared with the slag mixture. By using a 10% replacement of UFFA, a large improvement with respect to autogenous shrinkage, relative to a 10% silica fume replacement in high strength concrete occurs, without any noticeable effect on compressive strength. The pore structure of the matrix paste at early ages of hydration appears to have a strong effect on autogenous shrinkage.
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