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The Concrete Quality Control in EDP Hydroelectric Schemes

机译：EDP​​水电方案中混凝土质量控制

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EDP has contributed in a decisive way to the development of hydropower in Portugal due to investment in the construction of new hydroelectric schemes, and the repowering and refurbishment of existing hydropower plants. Currently, EDP has three new hydroelectric schemes under construction, which include the erection of five dams: Baixo Sabor (upstream and downstream), Ribeiradio, Ermida and Foz Tua. As the owner of these hydroelectric schemes, EDP has played a key role in the specifications of concrete and the quality control of the materials used in the construction of these dams. In this context, EDP selects the most appropriate type of concrete according to the type of dam and its rate of construction, and is also responsible for prescribing the concrete mixes used in these kinds of projects. The mixtures are developed with regard to special concrete properties, which are defined by performance-based specifications for durability, in order to achieve the 100 years working life currently required by standardization for these structures. Besides, with the purpose of defining a proper mixture for each application there are other issues which have to be considered, such as the methods used for mixing, placing, compacting and finishing the concrete. Moreover, in order to satisfy both Portuguese and European standards, EDP has defined very specific requirements for all the products used in concrete production. Therefore, the tender documents include specifications for aggregate production, cement and fly ash, admixtures, and water quality for concrete batching. This paper refers not only to the quality control system of the concrete used in dam construction, and its responsibility, but also to the studies developed by EDP in order to select the most appropriate materials for each situation.
机译：由于投资建设新的水力发电计划以及对现有水力发电厂进行翻新和改造，EDP对葡萄牙的水电发展做出了决定性的贡献。目前，EDP正在建设三个新的水电计划，其中包括五个水坝的建造：Baixo Sabor（上游和下游），Ribeiradio，Ermida和Foz Tua。作为这些水力发电计划的所有者，EDP在混凝土规范和这些大坝建设中使用的材料的质量控制方面发挥了关键作用。在这种情况下，EDP根据大坝的类型及其建造速度选择最合适的混凝土类型，并负责开列这些项目中使用的混凝土配合料。这些混合物是针对特殊的混凝土性能而开发的，这些性能由基于性能的耐用性规范定义，以实现这些结构标准化目前所需的100年工作寿命。此外，为了为每种应用定义合适的混合物，还必须考虑其他问题，例如用于混合，放置，压实和整理混凝土的方法。此外，为了满足葡萄牙和欧洲的标准，EDP对混凝土生产中使用的所有产品都定义了非常具体的要求。因此，招标文件包括骨料生产，水泥和粉煤灰，外加剂和混凝土配料水质的规范。本文不仅涉及大坝建设中所用混凝土的质量控制体系及其职责，还涉及EDP开展的研究，以针对每种情况选择最合适的材料。

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