What is it about?

Investigate the influence of the ring test procedure on shrinkage of shotcrete since ASTM C157 procedure is ill-suited for unconventional placement methods such as shotcrete.

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Why is it important?

Improving the free ring test method is necessary as recent studies have demonstrated the increasing use of free drying shrinkage in combination with restrained shrinkage to evaluate creep and stress relaxation of concrete.


It is recommended that similar geometry be used for both free and restrained shrinkage measurements,

Dr. Bruce Menu
Universite Laval

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This page is a summary of: Studies on the Influence of Drying Shrinkage Test Procedure, Specimen Geometry, and Boundary Conditions on Free Shrinkage, Advances in Materials Science and Engineering, January 2017, Hindawi Publishing Corporation,
DOI: 10.1155/2017/9834159.
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