Drum-mounted probe exhibits increasing potential to trump cone test for slump
- Published: Friday, 17 August 2012 15:06
- Written by CP Staff
After four years of development and mixer fleet installations in 17 countries (and counting), the drum-mounted IBB Rheological Probe is shaping up as an alternative to conventional slump and spread testing. The device uses principles similar to a rheometer: Movement of an “impeller” within the concrete load at different speeds creates a flow curve that can be used to gauge viscosity and yield stress—the true behavior of fresh concrete. Most importantly, workability can be accurately estimated on a wide range of slump values by using a calibration with the load measured at low drum speed.