This report describes the outline of the concrete works at the construction of the No.3 and No.4 units of Takahama Nuclear Power Station, Kansai Electric Power Company. About 400000 m
3 of concretes containing moderate heat cement, pulverized fuel ash and a naphthalen-based superplasticizer, were placed at the construction. In order to obtain sufficient quality of the structures, various tests for the quality control of the materials and the concrete were conducted. A new-type distributor was introduced to make it easy to place a large volume of concrete.
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