Design, Production and Placement of Self-Consolidating Concrete

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Design, Production and Placement of Self-Consolidating Concrete


A certain amount of cement paste is required to produce powder type SCC. This
amount largely depends on the granulometric characteristics of the aggregates
used. The amount of cement paste required to produce SCC is usually determined
empirically on the basis of fresh concrete tests, or is assumed on the basis of the
experience gained so far (see e.g. [1-3[3]). Since this situation is not satisfying, a
method to determine the required cement paste volume which is not purely
empirical has been developed, which is termed aggregate-packing test (APT).

Abstract. The paper describes a new approach to determine the volume of the
cement paste required to produce SCC irrespective of the granulometric
characteristics of the aggregate. A test vessel has been designed which enables the
determination of the void ratio of the aggregate and the necessary paste volume.
The method has been applied to various aggregate (crushed quartz porphyry,
crushed muschelkalk, gravel, fluvial sand). SCC mixtures have been designed
according to the new approach, and it turned out that it has a good predictive

potential as the mixture composition is concerned.
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