Johanson quality control tester

Jenike and Johanson quality control tester The test apparatus consists of a sample container, which has a small cylindrical section above a converging conical section, mounted on a frame (Figure 1.29). Three different containers, all of the same height but of... 

Figure 1.29 Jenike and Johanson Quality Control Tester (JJQC) (Jenike and Johanson Inc).

This tester is designed for cohesive materials so a limit is placed on the maximum particle size of powder used in the tester. Tests can be conducted at both ambient temperature and humidity or under conditions created in an environmental chamber. Tests conducted with the Jenike and Johanson Quality Control Tester (JJQC) have been compared with results obtained from a conventional Jenike shear cell tester using cohesive titanium dioxide, laundry detergent, baking soda and table salt. A plot of the failure pressure obtained from the JJQC tester and the Jenike shear cell tester strength showed that the JJQC test values are significantly lower at high consolidation pressures but were comparable to the Jenike values at low consolidation pressures (Ploof Carson 1994). 

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