Posted on May 12, 1999 at 13:56:47:

There is a lot of discussion in this forum concerning

the Indicizer and the Jenike tester.

An alternative, which is easy to handle (especially the

computer-controlled version RST-01.pc where the test is run and

evaluated by a PC connected to the tester) and provides

results very similar to that of the Jenike tester, is the

ring shear tester RST-01.01. This device was developped in 1993

regarding experience with the Jenike tester and other

testers, and it provides some technical advantages

against ring shear testers (annular shear testers)

used in the past.

For example, the range of application of this ring shear tester

is very large compared to other testers:

You can test typical bulk solids (cement, coal, etc.),

but also very elastic powders (e.g. PE powder) or very

moist materials like moist clay or sewage sludge,

and the tests can be performed at stresses from less

than 500 Pa up to more than 40 kPa. You can test the

flowablility (yield locus), the time consolidation,

the wall friction, the compressibility, and it assists

in attrition tests.

Ring shear testers of this type are used, for example,

by many of the largest chemical or pharmaceutical companies

in europe and in the United States, but also at

research institutes and universities.

More information you will find at http://www.dietmar-schulze.de. ■