Performance of Concrete Incorporating Condensed Silica Fume and Superplasticizers

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Title: Performance of Concrete Incorporating Condensed Silica Fume and Superplasticizers

Author(s): Per A. Jahren

Publication: Special Publication

Volume: 91

Issue:

Appears on pages(s): 865-892

Keywords: admixtures; bending; compressive strength; concretes; performance; plasticizers; silica.

Date: 2/1/1986

Abstract:
This paper reports results from an on-going research program on the use of condensed silica fume and superplasticizers in concrete. The program is being performed at different laboratories andvariations caused by the local conditions are reported. The major objective of the research program has been to establish influence charts for variable dosage rates of mineral and chemical admixtures under conditions which are as close to the field conditions as possible. The relative increases in compressive and bending strengths of concrete for various dosage rates of condensed silica fume and superplasticizer are presented. It is concluded that important admixtures such as silica fume and superplasticizers do not influence strength at a constant or linear ratio; the influence is more complex and is governed by the variables involved.