ABOUT THE IMPROVEMENT OF US MEASUREMENT TECHNIQUES FOR THE QUALITY CONTROL OF FRESH CONCRETE GERÄTETECHNISCHE FORTSCHRITTE BEI DER QUALITÄTS- SICHERUNG VON FRISCHBETON MIT ULTRASCHALL AMÉLIORATION DES TECHNIQUES DE MESURE ULTRASONIQUES POUR LE CONTRÔLE DE QUALITÉ DU BÉTON FRAIS.

Over the last decade a testing method based on ultrasound was developed at the Institute of Construction Materials of the University of Stuttgart to control the hardening process of cementitious materials by means of non-destructive testing. This paper describes the systematic improvement and re-design of the testing system and the investigation methods.