Low-velocity flexural impact response of steel fiber reinforced concrete subjected to freeze-thaw cycles in NaCl solution
Low-velocity flexural impact response of steel fiber reinforced concrete subjected to freeze-thaw cycles in NaCl solution
复制标题
钢纤维混凝土在氯化钠溶液中冻融循环的低速弯曲冲击响应
DOI：
10.1016/j.conbuildmat.2015.09.045
复制
发表时间：
2015-12-30
影响因子：
7.4
通讯作者：
Zhou, Yao
中科院分区：
文献类型：
--
作者：
Zhang, Wuman;Chen, Shuhang;Zhou, Yao
研究了钢纤维混凝土（SFRC）在3.0%NaCl溶液中冻融循环下的弯曲冲击响应。进行冻融循环，然后进行弯曲冲击试验。测定了钢纤维混凝土的失重率和残余应变。结果表明，掺量为1.5%（体积分数）的钢纤维对混凝土在3.0%NaCl溶液中冻融循环后的失重影响不大。随着弯曲冲击次数的增加，底部和侧面的残余应变均增大。对于经历0、100、150、200次冻融循环后的钢纤维混凝土，残余应变与冲击次数的关系可用指数函数拟合，相关系数较好。在3.0%NaCl溶液中冻融循环对初始冲击强度的影响不大。经过250次冻融循环后，钢纤维混凝土的初始冲击强度明显下降。(C)2015爱思唯尔有限公司版权所有。
The flexural impact responses of steel fiber reinforced concrete (SFRC) with freeze-thaw cycles in 3.0% NaCl solution were investigated in this paper. Freeze-thaw cycles were carried out and followed by the flexural impact test. The weight loss and the residual strain of SFRC were measured, respectively. The results show that 1.5% (by volume) steel fibers addition has a little effect on the weight loss of concrete subjected to the freeze-thaw cycles in 3.0% NaCl solution. Both the bottom and side residual strain increase with the increasing of flexural impact test. For SFRC subjected to 0, 100, 150, 200 freeze-thaw cycles, the relationships between the residual strain and the number of impact test can be fitted by exponential functions with a good correlation coefficient. The effect of freeze-thaw cycles in 3.0% NaCl solution on the initial impact strength is slight. However, the initial impact strength decreases obviously after SFRC specimens are subjected to 250 freeze-thaw cycles. (C) 2015 Elsevier Ltd. All rights reserved.