ASTM C61Full Name ASTM C61 – Standard Specification for Gypsum Keene’s CementScope This specification covers various grades of anhydrous calcined gypsum known as gypsum Keene’s cement, designed for use in the base and finish coats of gypsum plaster.Keywords anhydrous gypsum; gypsum; gypsum Keene’s cement; gypsum plaster; Keene’s cement; plasterResourcesASTM International Website: ASTM C61 Need more info? Please submit the following form. We will contact you within one business day. How did you hear about us? Please select an option from the listSearch EngineOnline AdsClient RelationshipReferralOther