Use of waste gypsum to replace natural gypsum as set retarders in
Waste Manag 2009 May29 5 16759 doi 10 1016 j wasman 2008 11 014 Epub 2009 Jan 7 Use of waste gypsum to replace natural gypsum as set retarders in portland cement Chandara C 1 Azizli KA Ahmad ZA Sakai E Author information 1 School of Materials amp Mineral Resources Engineering Universiti Sains nbsp
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