ADMIXTURES FOR ULTRA-HIGH STRENGTH (UHS) SELF-CONSOLIDATING CONCRETE (SCC)

摘要：

While the early development of polycarboxylate ethers (PCE) was driven by a general need for higher concrete strength, the latest admixture technology has pushed the limits for ultra high strength concrete (UHSC) to new heights. Triggered by very high land prices in big cities,architects strive to maximize usable space, reducing concrete column diameters and enlarging concrete beam spans to create spacious interiors. Such desire requires highly workable, ultra high strength concrete. Recent applications reach compressive strengths of up to 150 MPa and more. Apart from the very low water/binder ratio of such concrete and the resulting need for extremely strong water reducing performance, admixtures specialized for this application need to address additional problems of UHSC when made as SCC, such as pump ability, concrete thixotropy, and shrinkage. This paper will discuss the performance of new admixtures developed to address these problems encountered when producing and placing UHS-SCC.

作者: Dr.Jan Kiuegge Akira Ohta Sven Asmus

作者单位: BASF Construction Chemicals Asia Pacific, Shanghai, China BASF Construction Chemicals Asia Pacific, Chigasaki, Japan

会议类型: 国际会议

会议名称: 第二届自密实混凝土设计、性能及应用技术国际研讨会(2nd International Symposium on Design,Performance and Use of Self-Consolidating Concrete SCC2009-China)

会议地点: 长沙

会议语种:英文

页码: 194-200

在线出版日期: 2009-06-05（万方平台首次上网日期，不代表论文的发表时间）