The authors gratefully acknowledge the generous assistance of Aggregate Industries, which provided the concrete truck, laboratory facilities, and concrete materials used in this study. The authors also wish to thank the Sika Corporation for providing the chemical admixtures. We thank the Région Bretagne, the VCCTL Consortium (NIST) and the International Center for Aggregates Research for their financial contribution to this study. We also would like to extend our thanks to Max Peltz for his help during the tests, and to Dr. Nicos Martys (NIST), Dr. Edward Garboczi (NIST), and Prof. David Fowler (University of Texas at Austin) for their fruitful comments.