国内外自密实高性能混凝土研究及应用现状

State of the art on Research and Application of Self compacting Concrete at Home and Abroad

自密实混凝土即拌合物具有很高的流动性而不离析、不泌水，能不经振捣或少振捣而自动流平并充满模型和包裹钢筋的混凝土。不仅可大大降低施工噪声，而且可加快施工速度、保证和提高施工质量。可通过配合比调整其物理、力学性能。对原材料、配合比敏感，对施工要求严格。由于历史短，尚有若干问题需进一步研究。

Self compacting concrete possesses very high fluidity but no segregation and no bleeding.Without vibration,the fresh self compacting concrete can flow to be aut levelling,fill up the moulding board and hold the reinforced bar.With self compacting concrete,the noise pollution can be reduced greatly,progress rate of construction can be quickened,and quality of concrete can be ensured.Physical and chemical properties of self compacting concrete can be regulated by design of mix proportion.Self compacting concrete is sensitive to raw materials and mix proportion,and strict operation process is required.Some problems need to be studied further because of the shorter history of self compacting concrete.