Monitoring of the ultrasonic P-wave velocity in early-age concrete using Smart AggregatesCédric Dumoulin, Grigoris Karaiskos, Jérôme Carette, Stéphanie Staquet and Arnaud DeraemaekerMATEC Web of Conferences, 1 (2012) 01001DOI: https://doi.org/10.1051/matecconf/20120101001