Title: Bond Effects in High-Strength Silica Fume Concretes

Author(s): A. Godman and A. Bentur

Publication: Materials Journal

Volume: 86

Issue: 5

Appears on pages(s): 440-449

Keywords: bond (paste to aggregate); compressive strength; high-strength concretes; microstructure; silica fume; water-cement ratio; Materials Research

DOI: 10.14359/2014

Date: 9/1/1989

Abstract:
Strengthening effects in high-strength silica fume concretes were evaluated in terms of "water-reducing effect" associated with the reduction in water requirement in the silica fume system and in terms of an "inherent effect" that reflects the increase in strength of the silica fume concrete over a similar water-cement ratio concrete without silica fume. The inherent effect was found to be as important as the water-reducing effect, and it is suggested that its origin is in the improved aggregate-matrix bond. This enhanced bonding is associated with the formation of a dense microstructure in the transition zone of the silica fume concrete.