198 posts
324 posts
TimePosted
05/05/2009 09:11:49
Michael Clark
says
Re: Gypsum Dehydration
Gypsum dehydration is necessary for it to become an effective set moderating agent. Gypsum itself is insolouble and therefore cannot moderate the setting of the C3A in cement clinker. For that to happen soluble sulphate must be present. Dehydration of gypsum to hemihydrate renders it soluble.
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