发明授权
US07972436B2 Air management in cementitious mixtures having plasticizer and a clay-activity modifying agent
有权
具有增塑剂和粘土活性改性剂的水泥混合物中的空气管理
- 专利标题: Air management in cementitious mixtures having plasticizer and a clay-activity modifying agent
- 专利标题(中): 具有增塑剂和粘土活性改性剂的水泥混合物中的空气管理
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申请号: US10267631申请日: 2002-07-08
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公开(公告)号: US07972436B2公开(公告)日: 2011-07-05
- 发明人: Chia-Chih Ou , Ara A. Jeknavorian , Christon L. Hill
- 申请人: Chia-Chih Ou , Ara A. Jeknavorian , Christon L. Hill
- 申请人地址: US MD Columbia
- 专利权人: W. R. Grace & Co.-Conn.
- 当前专利权人: W. R. Grace & Co.-Conn.
- 当前专利权人地址: US MD Columbia
- 代理商 Craig K. Leon; Stephan P. Williams
- 主分类号: C04B24/12
- IPC分类号: C04B24/12 ; C04B24/18
摘要:
An exemplary surface active agent admixture composition of the invention comprises (1) a first surface active agent comprising a betaine, an alkyl or aryl or alkylaryl sulfonate, or mixture thereof; and (2) a second surface active agent comprising a nonionic oxyalkylene-containing polymer surfactant. The present invention therefore provides a system for ensuring the presence in a hydratable cementitious composition (when hardened) a sufficient air volume and sufficient air void fineness and consistency. Further exemplary admixture compositions may comprise one or more plasticizers and one or more clay activity-modifying agents. Cementitious compositions and methods for modifying cementitious compositions, which incorporate the above-mentioned surface active agent combination, are also described. The invention provides the ability to adjust and stabilize air void systems in hydratable cementitious compositions, while allowing conventional air entraining agent (AEA) dosage practices to be followed.