从40MPa迈向100MPa:混凝土的材料技术评价

在北美，１００ ＭＰａ 的高强混凝土已成功地用在高层建筑中。目前，它正向东南亚推广。最近，香港已批准使用１００ ＭＰａ 混凝土。对４０ ＭＰａ 混凝土材料技术的评定表明，这种混凝土由于水泥基体中缺陷、孔洞以及各种低强度微观粒子而使其强度受到了限制。采用超塑化剂以及掺入硅粉可以弥补这些缺陷， 从而达到高强的目的。对这两种材料的比较表明，可以采用新技术使混凝土施工技术有良好的转变

From 40 MPa to 100 MPa:Materials Appreciation for Concrete

High strength concretes of around 100 MPa have successfully been implemented for high rise structures on North America but the focus for further applications is changing to S.E. Asia. Approval has been recently granted for utilizing Grade 100 concrete in Hong Kong. A microstructure appreciation of Grade 40 concrete suggests that its strength is limited by flaws, voids and low strength micro-variations in the cement matrix structure and by weak transition zones between the aggregate and matrix. Use of superplasticizer and in corporation of microsilica is remedying these deficiencies and enabling higher strength to be achieved. A comparison of high strength concrete with normal concrete indicates that a new technology is available which could potentially lead to a transformation of concrete construction.