Invention Grant
US08685156B2 Modifying clay activity and slump retention in cementitious compositions
有权
改善水泥组合物中的粘土活性和坍落度保留
- Patent Title: Modifying clay activity and slump retention in cementitious compositions
- Patent Title (中): 改善水泥组合物中的粘土活性和坍落度保留
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Application No.: US12997723Application Date: 2009-07-10
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Publication No.: US08685156B2Publication Date: 2014-04-01
- Inventor: Hideo Koyata , Shuqiang Zhang , Byong-wa Chun
- Applicant: Hideo Koyata , Shuqiang Zhang , Byong-wa Chun
- Applicant Address: US MD Columbia
- Assignee: W. R. Grace & Co.-Conn.
- Current Assignee: W. R. Grace & Co.-Conn.
- Current Assignee Address: US MD Columbia
- Agent Craig K. Leon
- Priority: JP2008-181296 20080711
- International Application: PCT/JP2009/062931 WO 20090710
- International Announcement: WO2010/005117 WO 20100114
- Main IPC: C04B24/04
- IPC: C04B24/04 ; C04B24/12
Abstract:
The present invention relates to the use of polycationic compound in combination with a hydroxycarboxylic acid or salt thereof to enhance slump retention in cements and concretes having clay-bearing aggregates, wherein the clay otherwise absorbs or diminishes the dosage efficiency of polycarboxylate superplasticizers.
Public/Granted literature
- US20110088599A1 SLUMP RETAINING ADMIXTURE FOR MODIFYING CLAY ACTIVITY IN CONCRETE Public/Granted day:2011-04-21
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