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Test Studies on Performances of TGP total gradation concrete

Engineering Sciences 2005年第4期 32-38页

作者： Dai Huichao~(1,2)(1. Hohai University, Nanjing 210098 2. China Yangtze Three Gorges Project Development Corporation, Yichang, 443002)

The Three Gorges Project （TGP） is the largest water conservancy and hydropower complex in the world, with a concrete consumption of 28 million m3in total. For such a significant world-attracting project, first rate quality concrete is needed. Various mechanical and deformation performances of hydraulic mass concrete are determined conventionally by the wet screening method to make small specimens and the test results of the small standard specimens are taken to represent the properties of the mass concrete. However, the quantity of the coarse aggregate after wet screening would be reduced by 30% or so and the gel materials would increase by 20% or so, thus causing significant differences between the properties of the small concrete specimen and that of the total gradation concrete. To well understand the performances of the total gradation concrete of TGP dam, test studies have been performed on the total gradation concrete, including compressive strength, split tensile strength, elastic modulus, ultimate tension, dry shrinkage, self volume deformation, creep, seepage prevention, and so on, and comparison made with the small standard specimens to find out the relationship between them, which have provided scientific ground for the design, operation and safety verification of the TGP dam.

关键词： Three Gorges Project hydraulic mass concrete total gradation concrete performance tests

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