高延性纤维增强水泥基复合材料(ECC) 最早由美国密歇根大学Li教授于20世纪90年代设计提出,近年来在工业与民用建筑建领域中得到了较为广泛的应用。长江科学院提出了适用于水工建筑的水泥基复合材料(HECC)概念。根据不同水工结构功能要求,HECC应具有按需设计的拌和物性能和成型方法、中等强度、低弹性模量、按需设计的延伸率、较强的热稳定性、高耐久性、可控的裂缝宽度以及较为宽泛的原材料选择。在此基础上,提出了HECC在堆石坝新型坝基廊道、面板堆石坝新型防渗面板、堆石坝新型心墙结构、拱坝基础约束区抗震防裂结构等水工结构中的应用构想。同时,展望了HECC未来拟研究的方向。研究成果对于提高水工结构的安全性、经济性和耐久性有参考价值。
Abstract
Engineered Cementitious Composite (ECC) was first designed and proposed by Professor Li of the University of Michigan in the 1990s, and has been widely used in industrial and civil construction in recent years. Changjiang River Scientific Research Institute proposed the concept of Hydraulic Engineered Cementitious Composites (HECC) which is suitable for hydraulic construction.According to the functional requirements of different hydraulic structures, HECC should have the properties of mixtures and molding methods designed on demand, medium strength,low elastic modulus,elongation designed on demand,strong thermal stability,high durability,controllable crack widths and a wider choice of raw materials. On this basis, HECC is proposed to be applied in hydraulic structures such as the new dam foundation gallery of rockfill dams, the new anti-seepage face slabs of face-rockfill dams, the new core wall structures of rockfill dams, and the anti-seismic and anti-cracking structures of the foundation constraint area of arch dams. In addition, the future research direction of HECC is prospected.
关键词
HECC /
中等强度 /
可控裂缝宽度 /
高耐久性 /
水工结构
Key words
HECC /
medium strength /
controllable crack width /
high durability /
hydraulic structure
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参考文献
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基金
国家自然科学基金项目(52179122,U2040222,52109147);湖北省自然科学基金项目(2022CFD026)
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