| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a technique capable of simultaneously attaining, in construction of a dam body including a large-scale dam, reduction of work period, reduction in hydration cooling cost, and reduction in environmental load. <P>SOLUTION: In the construction method of a concrete dam body, zero slump concrete is used as an internal constituting material of the dam body, and RCD construction method is applied. The zero slump concrete has a super hard mixed concrete composition having a water binder ratio of 60-100%, a rough aggregate maximum dimension of 50-200 mm, a unit binder amount of 100-170 kg/m<SP>3</SP>, a unit fine aggregate amount of 600-800 kg/m<SP>3</SP>, and a unit rough aggregate amount of 1400-1700 kg/m<SP>3</SP>, in which blast-furnace slag fine powder with alite content of 1.0 mass% or more is used in an amount of more than 96 to 100 mass% relative to the overall binder, and the zero slump concrete has a property such that the compression strength at a material age of 28 days is 8-30 N/mm<SP>2</SP>. In this case, it is effective to set the lift height per layer in the RCD method to 1.0 m or more. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
