Concrete properties of ternary cementitious systems containing fly ash and silica fume

Abstract EN

This research presents the results from laboratory studies on the properties of concrete that contains ternary blends of Portland cement, fly ash, and silica fume.

Selected nine concrete mixtures are prepared with water to cementitious material ratio of 0.

4.

The concrete mixtures were designed to have the same degree of workability and percentage of air content.

The measured properties of fresh concrete include the slump, air content, and unit weight.

The investigated properties of hardened concrete include the compressive strength, tensile strength, dynamic elastic modulus, and static young’s modulus.

The results indicate that concretes made with these systems generally show good fresh and hardened properties since the combination of fly ash and silica fume is somewhat synergistic.

Fly ash appears to compensate for some of the workability problems associated with the use of silica fume, whereas the silica fume appears to compensate for the relatively low early strength of fly ash concrete.