Approximate concrete slump and workability readings can be determined prior to or after placement with the "K-SLUMP" Tester in just 60 seconds.
The 12in length x 3/4in diameter (305x19mm) hollow-tube probe has two groups of side openings through which wet concrete enters to raise a floating plunger to give an estimate of concrete slump. Workability is indicated by an additional simple up-and-down motion of the probe. Readings are reliable when 6in (152mm) or more of concrete surrounds the tester. Instructions and correlation chart included.
Complies with ASTM C1362