I am looking to perform some BET/BJH tests on historic cement samples which have been ground up to a fine powder. Currently, I have used vacuum-oven drying at 105 C but am concerned this may be quite a harsh way of drying the powder. Having read around the literature D-Drying appears to be a relatively well regarded technique, however I am struggling to find an explanation of the method? So far I have found a schematic that looks like a moisture trap but with little other explanation...
Any advice would be appreciated
Alex
You are right to be concerned about vaccuum drying at 105°C as this is likely to destroy any remaining calcium silicate hydrates. D-drying is described well here:
http://www.sciencedirect.com/science/article/pii/S000888460500308X
along with the effect of many other methods on the pore structure.
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