I want to determine fineness in terms of specific surface area for different materials such s fly ash, OPC and PPC cement using blaine air permeability apparatus. Should I need to determine separate K value for all materials using respective standard samples or using any one of them? My doubt is whether constant K remain same for instrument or it takes different values for different materials.
Please consult the attached reference which may be of help for you to understand the variation in K with respect to reference material.
Thanks for the reference material. Should I need to remove the plunger while performing the tests. I have gone through many videos available on youtube. But there is contradiction about the plunger. In some of the videos plunger is not there during the test, while in some other videos plunger is there on permeability cell. Can you clarify it ?
you may find the following link of video useful
https://www.youtube.com/watch?v=6_w9Vo8fKlI
Similarly ASTM c 204 useful
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