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In Japan ， approximately 924 miliion tons of coal ash is now ・ produced f め m the匸mal power plants ， and the amount is estimated to execed l L4 million tons in fiscal 2013 ． But ， the uses forconcrete mixture are very limited ， ln this study ， in order to understand the obstructive 飴ctors， we investigated uses of ready mixed concrete using fly ash ， As a result ， we obtained the useful informa し ion fbrdesign ， construction and distribution ofready mixed concrete using fly ash

This paper describes the results of research study on closed recycle of high strength prestressed concrete pole. As the result, the main conclusions are as follows. 1) The quality of recycled coarse aggregate made from used concrete poles corresponds to the recycled aggregate class M. 2) The quality of recycled fine aggregate made from used concrete poles corresponds to the recycled aggregate class L. 3) There is a possibility that recycled aggregate made from used concrete pole can be applied for new concrete pole, if natural aggregate is replaced with a part of recycle aggregate.

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