Concrete　industry　has　come　to　the　stage　of　reconsidering　the　effective　way　of　using　natural　quality　aggregates　as　well　as　the　technology　for　reusing　demolished　concrete　as　aggregates.　The　annual　cement　output　has　reached　730　million　tons　in　China　and　around　4　billion　tons　of　concrete　was　fabricated　last　year,　which　equals　a　need　for　about　3　billion　tons　of　aggregates.　This　paper　discusses　the　possibility　of　repeated　reuse　of　crushed　concrete　as　recycled　aggregate　and　introduces　the　preliminary　results　of　tests.　Different　proportions　of　recycled　aggregates　were　used　to　replaced　natural　aggregate,　the　workability　of　fresh　concrete　and　properties　of　hardened　concrete　were　studied　and　compared　with　reference　concretes.　Recycled　aggregates　from　original　high　strength　concrete　could　be　used　to　make　relative　high　strength　concrete,　recycled　aggregate　from　crushed　low　strength　concrete　could　only　be　used　to　make　lower　strength　concrete.　A　digital　camera　was　employed　to　take　the　pictures　of　broken　surfaces　of　concrete　specimens.　Test　results　showed　that　crushed　concrete　can　be　used　as　recycled　aggregate　to　make　new　concrete,　but　the　reuse　of　concrete　as　recycled　aggregate　is　influenced　by　the　quality　of　the　original　concrete.