废弃混凝土制全再生细骨料中试工艺研究  

Pilot-scale process research of recycled total-fine aggregate from waste concrete

作　　者：杨医博[1,2] 苏延 李之吉 陈前谱 陈百曦 郭文瑛[1] 王恒昌[1] YANG Yibo;SU Yan a;LI Zhiji;CHEN Qianpu;CHEN Baixi;GUO Wenying;WANG Hengchang(School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,China;State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]华南理工大学土木与交通学院,广东广州510640 [2]华南理工大学华南理工大学亚热带建筑科学国家重点实验室,广东广州510640

出　　处：《混凝土》2020年第10期80-84,共5页Concrete

基　　金：广东省公益研究与能力建设专项资金资助项目(2014B020216001)。

摘　　要：针对废弃混凝土制备全再生细骨料中试研究需求,进行中试设备选型、中试生产线的设计以及工艺优选研究。优选出PE-250×400颚式破碎机进行一次粗破碎,振动给料机、圆振动筛、PCX-8040高效细碎机循环制砂的中试设备和工艺,并制备出性能满足GB/T 25176—2010《混凝土和砂浆用再生细骨料》要求的全再生细骨料。全再生细骨料优良的颗粒级配、较高的表观密度、较低的压碎指标和吸水率,使得其能够全取代河砂用于制备混凝土。In order to meet the pilot-scale research requirements of recycled total-fine aggregate from waste concrete,equipment selection,process research and the production line design were completed.PE-250×400 jaw crusher was used for single rough crushing.Circular vibration screen,vibration feeder and PCX-8040 hammer crusher were used for cyclic sand making.By using optimal pilot-scale process,recycled total-fine aggregate with properties meeting the requirements of"Recycled fine aggregate for concrete and mortar"was prepared.The fine grain composition,high apparent density,low crushing index and low water absorption make recycled total-fine aggregate able to completely replace river sand for preparing concrete.

关 键 词：废弃混凝土 全再生细骨料 再生细骨料 中试设备 工艺研究 

分 类 号：TU528.041[建筑科学—建筑技术科学]