To　solve　problems　of　low　recycling　level　of　urban　construction　and　demolition　(C&D)　waste　and　long　period　of　backfill　construction　for　road　trench,　recycled　fine　aggregate　from　C&D　waste　was　used　in　rapid-hardening　controlled　low　strength　materials　(CLSM).　The　influence　of　four　factors　(including　accelerator　type,　accelerator-to-binder,　water-to-solid　and　binder-to-recycled　fine　aggregate　ratios)　on　workability,　mechanical　properties　and　resistance　to　dry　shrinkage　of　CLSM　was　investigated.　Results　show　that　the　accelerator　has　no　obvious　effect　on　the　flowability　of　CLSM,　however,　reduces　its　bleeding　rate　and　dry　shrinkage　significantly.　There　is　existing　certain　difference　in　the　early　strength　characteristics　of　two　types　of　accelerator.　The　optimal　accelerator-to-binder　value　for　best　early　strength　development　is　40%　and　20%,　respectively,　with　the　4-hour　strength　all　reaching　0.7　MPa.　Additionally,　with　the　accelerator-to-binder　ratio　fixed,　the　early　hour　strength　of　CLSM　is　affected　by　the　amount　of　cementitious　materials　and　the　actual　content　of　free　water.　Increasing　the　water-to-solid　ratio　will　increase　the　flowability,　bleeding　rate　and　resistance　to　dry　shrinkage　of　CLSM,　and　reduce　its　mechanical　properties;　while　increasing　the　binder-to-recycled　fine　aggregate　ratio　will　increase　the　flowability　and　mechanical　properties,　and　reduce　its　bleeding　rate　and　resistance　to　dry　shrinkage.　©　2018,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.