Friday, January 21, 2011

Concrete terminology - heavy and hard...

What's the difference between hydraulic cement underlayment and gypsum cement underlayment? Not much, based on this terminology database:

Concrete terms

Two separate spec sections for hydraulic vs gypcrete, and not much of a difference, it seems. The way hydraulic cement is defined, it seems that it means "just add water"...wha?

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