Synergistic Roles of Slag and Silica Fume in Very High-Strength Concrete
- 1 July 1990
- journal article
- Published by ASTM International in Cement, Concrete and Aggregates
- Vol. 12 (1) , 32-37
- https://doi.org/10.1520/cca10386j
Abstract
A very high-strength concrete (W/C = 0.20) containing 10% silica fume, 30% slag replacement for cement, and a high-range water-reducing admixture attained a compressive strength of 94 MPa at 28 days. The microstructural development of this concrete was studied from 1 to 28 days with SEM/EDXA and TEM. The slag used was reactive, with 70% melilite group phases and an index of hydraulicity of 1.2. Microstructural changes occurring in the first 28 days are presented. The factors responsible for promoting strength are also discussed.Keywords
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