Title: New Mineral Admixtures for High-Strength Concrete

Author(s): A. M. Rosenberg and J. M. Gaidis

Publication: Concrete International

Volume: 11

Issue: 4

Appears on pages(s): 31-36

Keywords: aggregates; bleeding (concretes); bonding; calorimeters; chlorides; drying shrinkage; ettringite; high-strength concretes; mineral admixtures; permeability; porosity; silica fume; water-reducing agents; x-ray diffraction; Materials Research

DOI:

Date: 4/1/1989

Abstract:
During research leading to the development of a new concrete admixture, insight was obtained on how silica fume enhances the strength of concrete. Silica fume does not densify concrete in the usual sense; it enhances the paste-aggregate bond, which is generally the weakest part of concrete. This comes about by a reduction in the amount of bleed water produced. Chemical and physical evidence is shown to prove these conclusions.