Title:
Effects of Silica Fume on Crack Sensitivity
Author(s):
T. Kanstad, Ø. BjØntegaard, E. J. Sellevold, T. A. Hammer, and P. FidjestØl
Publication:
Concrete International
Volume:
23
Issue:
12
Appears on pages(s):
53-59
Keywords:
crack sensitivity estimations, experimental testing, materials technology, silica fume, young high-performance concrete
DOI:
Date:
12/1/2001
Abstract:
The following materials properties were determined for concretes with different silica fume contents (0, 5, or 10%) to assess their crack sensitivity during the hardening phase: heat, E-modulus and tensile strength development, thermal dilation coefficient, autogenous shrinkage, and creep/relaxation properties. The ratio over time between self-induced stress and the strength were then calculated by FEM-analyses for a variety of external conditions. The overall result is that effects of variation in silica fume content is of minor importance compared to other factors such as cement type, w/b-ratio, structural configuration, degree of insulation, and environmental conditions.