文献类型：期刊文献

英文题名：The damping property of recycled aggregate concrete

作者：Liang, Chaofeng[1];Liu, Tiejun[2];Xiao, Jianzhuang[3];Zou, Dujian[2];Yang, Qiuwei[1]

机构：[1]Shaoxing Univ, Dept Civil Engn, Shaoxing 312000, Peoples R China;[2]Harbin Inst Technol, Shenzhen Grad Sch, Shenzhen 518055, Peoples R China;[3]Tongji Univ, Dept Struct Engn, Shanghai 200092, Peoples R China

年份：2016

卷号：102

起止页码：834

外文期刊名：CONSTRUCTION AND BUILDING MATERIALS

收录：SCI-EXPANDED(收录号：WOS:000367635900089)、、EI(收录号：20154801630309)、Scopus(收录号：2-s2.0-84948432381)、WOS

基金：The authors would like to gratefully acknowledge the financial supports from the National Natural Science Foundation of China (51422804, 51308340, 51308322), Program for New Century Excellent Talents in University under Grant NCET-13-0171 and Zhejiang Provincial Natural Science Foundation of China (Y1110184).

语种：英文

外文关键词：Recycled aggregate concrete (RAC); Recycled coarse aggregate (RCA); Loss tangent; Damping ratio; Damping mechanism; Beam

外文摘要：Damping property is one of the intrinsic dynamic characteristics of a material. Currently, open studies on the damping property of recycled aggregate concrete (RAC) are very limited. This paper investigates the effect of replacement percentage and size of recycled coarse aggregate (RCA) on the damping property of RAC. Three-point dynamic bending test of beams and free vibration damping test were respectively conducted to study the loss tangent of RAC in elastic stage and the damping ratio of a RAC cantilever beam in inelastic stage. The results show that either an increase in replacement ratio or a decrease in RCA size leads to an increase in the loss tangent and damping ratio. Compared with natural aggregate concrete (NAC), the improvement in damping property of RAC may be induced by a number of factors such as the sliding among the old and new interfacial transition zones (ITZs), the propagation of micro-cracks, the friction within micro-cracks and macro-cracks, the compression and expansion of air in voids existed in old mortar. It is concluded that the replacement percentage and the RCA size have a significant influence on the damping property of RAC. (C) 2015 Elsevier Ltd. All rights reserved.