Mechanical properties of copper slag reinforced concrete under dynamic compression
Mechanical properties of copper slag reinforced concrete under dynamic compression
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DOI：
10.1016/j.conbuildmat.2009.12.001
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发表时间：
2010-06
影响因子：
7.4
通讯作者：
Wei Wu;Weide Zhang;G. Ma
中科院分区：
文献类型：
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作者：
Wei Wu;Weide Zhang;G. Ma
利用直径为50 mm的分离式霍普金森压杆系统(SHPB)研究了铜渣混凝土的动态力学性能。采用扫描电子显微镜对不同掺量的铜渣代砂混凝土和中国证监会混凝土的微观结构进行了研究。与对照混凝土相比，当铜渣取代量达到20%时，CSRC的动态抗压强度普遍提高，超过20%后强度有所下降。随着铜渣代砂掺量的增加，混凝土中的孔洞、微裂缝和毛细通道的含量明显高于对照混凝土，这主要是由于混凝土中水分过多而导致混凝土质量劣化的结果。
The dynamic mechanical properties of copper slag reinforced concrete (CSRC) were studied using a 50-mm-diameter split Hopkinson pressure bar (SHPB) system. The microstructures of control concrete and CSRC with various contents of copper slag as replacement of sand were investigated by Scanning Electron Microscope (SEM). The dynamic compressive strength of CSRC was generally improved with substitutional amounts of copper slag up to 20%, compared with the control concrete, beyond which the strength reduced. With the increasing content of copper slag as replacement of sand, there appeared to be higher content of voids, microcracks and capillary channels in CSRC than that in control concrete, which was mainly attributed to the presence of excess water and it resulted in deterioration of concrete quality.