The unconfined yield strength can be measured at one pressure or at many pressures to create what is called a flow function. The flow function presents the material’s gain in strength as more pressure is applied to it.<\/p>\n
For most powders and granular materials, the longer the material is exposed to pressure, the higher the unconfined yield strength becomes. Therefore, for powders and granular material that\u00a0are stored for any length of time, it is essential to study the effects of pressure over time. This is called time unconfined yield strength. In addition, a time flow function can be created. With the EPT, time tests are easy and inexpensive to perform. Time cells consist of sample cells and weights that allow a material to be subjected to various pressures over long periods of time.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0In addition to pressure, temperature and humidity can affect a material’s strength over time. The EPT time cells are designed so that they can be easily placed in ovens and humidity chambers to study their effects on materials in storage situations. Time is the\u00a0unmeasured parameter in flow property tests. The reason? Analysis cells for many flow measurement cells are very expensive and do not include the means of applying pressure over long periods.<\/p>\n
The EVOLUTION<\/a> Powder\u00a0Tester measures the unconfined yield strength and time unconfined yield strength for less than the cost of having 3 or 4 samples tested by independent laboratories.<\/p>\n Time Consolidation:<\/p>\n Sample cells can be stored under load at Measurement Results:<\/p>\n \u00b7 Unconfined Yield Strength Flow Factor (ff) Classification:<\/p>\n \u00b7 Non-Flowing (ff < 1) \n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n The Fast and Affordable Powder Flow Instrument Easy to\u00a0understand powder flow analysis Sim <\/p>\n","protected":false},"author":1,"featured_media":1513090,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[19,17,18,20,7,15,22,12,13,11,26,4,14,23,25,16,24,29,27,28,30,5,10,6,9,8,31,21],"_links":{"self":[{"href":"https:\/\/www.bihec.com\/mercury\/wp-json\/wp\/v2\/posts\/1510201"}],"collection":[{"href":"https:\/\/www.bihec.com\/mercury\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bihec.com\/mercury\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bihec.com\/mercury\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bihec.com\/mercury\/wp-json\/wp\/v2\/comments?post=1510201"}],"version-history":[{"count":1,"href":"https:\/\/www.bihec.com\/mercury\/wp-json\/wp\/v2\/posts\/1510201\/revisions"}],"predecessor-version":[{"id":1513097,"href":"https:\/\/www.bihec.com\/mercury\/wp-json\/wp\/v2\/posts\/1510201\/revisions\/1513097"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bihec.com\/mercury\/wp-json\/wp\/v2\/media\/1513090"}],"wp:attachment":[{"href":"https:\/\/www.bihec.com\/mercury\/wp-json\/wp\/v2\/media?parent=1510201"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bihec.com\/mercury\/wp-json\/wp\/v2\/categories?post=1510201"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bihec.com\/mercury\/wp-json\/wp\/v2\/tags?post=1510201"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nambient or climate controlled conditions
\nto measure the effects of humidity,
\ntemperature and pressure on the
\nmaterial’s flow.<\/p>\n
\n\u00b7 Flow Function
\n\u00b7 Compressibility
\n\u00b7 Time, Humidity, Temperature Effects
\n\u00b7 Bulk Density<\/p>\n
\n\u00b7 Very Cohesive (1 < ff < 2)
\n\u00b7 Cohesive ( 2 < ff < 4)
\n\u00b7 Easy Flowing (4 < ff < 10)
\n\u00b7 Free Flowing (ff > 10)<\/p>\n