Publikacje w roku 2017

Vol. 31, Zeszyt 4



Breaking tester for examining strength of consolidated starch

International Agrophysics
Rok : 2017
DOI : 10.1515/intag-2016-0043
Volumen : 31
Zeszyt : 2
Strony : 251 - 258
  PDF 1.58 MB
Autorzy: M. Stasiak1, M. Molenda1, M. Bańda1, J. Wiącek1, B. Dobrzański1,2, P. Parafiniuk1

1Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-290 Lublin, Poland
2Department of Pomology, University of Life Sciences, Akademicka 13, 20-950 Lublin, Poland
Streszczenie :

A new method based on the measurement of force required to break by bending a vertical column of consolidated powder was elaborated, and its results were compared with the ones obtained from the Jenike shear test. A new apparatus was built based on a vertical cylindrical chamber divided into two cylinders connected with a horizontal hinge. The apparatus was tested with samples of potato, maize and wheat starches with moisture content of 6, 12 and 17% and with the addition of a lubricant. Results of testing revealed significant differences in measured force required to rotate the upper part of the cylinder away from the lower one. The average force varied from 0.138 N for maize starch to 0.143 N for potato starch, while, for various moisture contents, the measured force varied from 0.135 N for 6% to 0.143 N for 17% mc. The results were compared with the results of a direct shear test.

Słowa kluczowe : starch, powders, flowability, breaking, strength
Język : Angielski