Public test guide

Shrinkage properties of concrete aggregate

Assesses the contribution an aggregate may make to drying shrinkage in a controlled concrete or mortar specimen.

Plain-language explanation

What the test tells you.

The project specification controls the exact method and acceptance requirement.

A specified mixture containing the aggregate is cast and its length change is measured after controlled curing and drying.

Aggregate, specified binder and mix equipment, moulds, curing environment and length comparator.

Length change associated with the aggregate under the specified test conditions.

Supports selection of aggregate where concrete shrinkage and cracking risk are important.

Typical test sequence

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