ABSTRACT
ABSTRACT As recycling of demolit ion concrete discharged from concrete structures, it is very important to take into consideration of not only reuse but also life cycle of concre te structures. In order to reuse over again the recycled concrete that p roduced from recycled aggregate in the past as aggregate for new concrete works , both of new concrete and recycled concrete should be designed to be obtained high quality concrete. To raise the strength of concrete that produced in the near future is directly connected with circulating reuse of demoli t ion concrete as aggregate resources. Key words : Original concrete, Recycled aggregate, Recycled concrete, Freshed concre te , Compress ive strength, Tensi le strength, Flexural s trength, Drying shrinkage, Neutralization, Ability of isolate chloride ion.
