Bestimmung der Luftporenkennwerte Frischbeton

Abstract

The present study investigates whether the air void parameters established in fresh concrete with a new Danish measuring device (DBT device) coincide with the parameters measured with the usual method in hardened concrete. To this end the air void parameters were determined on both fresh and hardened concrete in various series of tests and compared. A statistical analysis of the data revealed that, for the assessment of the air void system in fresh concrete with the new device, the spacing factor is suitable. The total air content in fresh concrete should continue to be determined with the usual air void vessel procedure as the result of the DBT device is influenced by the consistency for this parameter. (orig.)Available from TIB Hannover: ZA 4681(640) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman