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Changuinola I Dam, is located in district of Changuinola, in the Province of Bocas del Toro, in the western part of Panama. It is the largest roller-compacted concrete arch-gravity dam in the World. ==Technical features== The design of the dam was conducted by Malcolm Dunstan & Associates engineering and construction company.〔Erlendsson G., Cameron-Ellis D., Shaw Q., Dunstan M., The Development of the Design of Changuinola 1 Dam, Roller Compacted Concrete Dams, Symposium, Zaragoza, October 2012〕 The construction of the dam started on October 25, 2007 and its first generator was operational on November 19, 2011. The roller-compacted concrete arch-gravity dam has a maximum height of and length of . The upstream vertical face arch radius is . The induced joints are spaced at intervals, with inducers installed in every second layer after compaction. The downstream face slope varies form 0.5:1 (H:V) in the center and 0.7:1 (H:V) on the flanks. The RCC mix strength requirements were determined by a target direct tensile strength of . The composition of the high-paste RCC mix included: * Portland Cement - 70 kg/m3 * Fly Ash - 145 kg/m3 * Water - 119 kg/m3 * Coarse Aggregate - 1282 kg/m3 * Fine Aggregate - 888 kg/m3 * Retarder - 3.44 kg/m3 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Changuinola Dam」の詳細全文を読む スポンサード リンク
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