EFFECT OF MAXIMUM AGGREGATE SIZE IN AIR-ENTRAINED ECO-SCC

摘要：

This paper evaluates an extreme type of SCC, which has very little powder content compared to other SCC, and therefore high water-binder ratio. Such a ratio leads to very low plastic viscosity, which acts the opposite of stability in fresh concrete. Investigations cover the effect of different maximum aggregate sizes on rheology and some hardened concrete properties. Measurements are taken on fresh concrete properties with a co-axial cylinders viscometer, and compressive strength and drying shrinkage are tested. For comparison,measurements are also taken on air-entrained mixes. The resulting mixes revealed self-compacting properties for the smaller aggregate size, and air entrainment was beneficial in revealing self-compacting properties up to the midsize aggregates. The differing aggregate sizes had here no effect on compressive strengths or shrinkage strain.

作者: Florian V.Mueller Olafur H.Wallevik

作者单位: ICI Rheocenter, Reykjavik University, Innovation Center Iceland

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: 664-673

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）