ABSTRACT

The second author wishes to express his appreciation to the Japan Society of the Promotion of Science for partial financial support for the present study (Research No. 18686045).

REFERENCES

Creep, Shrinkage and Durability Mechanics of Concrete and Concrete Structures – Tanabe et al. (eds) © 2009 Taylor & Francis Group, London, ISBN 978-0-415-48508-1

S. Eppers & C. Mueller Research Institute of the Cement Industry, Dusseldorf, Germany

ABSTRACT: The autogenous shrinkage has become a topic of extensive research as it can lead to cracks in high-performance concrete. Yet there is still no standard method for its measurement. Research activities brought about a large number of different measurement setups. Though some of these setups lead to good repeatability, the comparison of results from different setups often reveals a large scatter. Only in some cases the discrepancies can be attributed to the different criteria applied to determine time-zero. It therefore appears necessary to agree upon the use of standardized measuring apparatuses and a criteria to determine time-zero. A standardized apparatus, called shrinkage cone, is presented herein. It was used to measure the autogenous shrinkage of ultra-high performance concrete. Results were compared to those from prisms and corrugated tubes. Additional restrained ring, needle penetration and heat of hydration tests were performed. The results were analyzed with regard to time-zero.