EVALUATION OF BOND PERFORMANCE OF REINFORCED CONCRETE USING HOT-DIP GALVANIZED REBAR BY NEUTRON DIFFRACTION
EVALUATION OF BOND PERFORMANCE OF REINFORCED CONCRETE USING HOT-DIP GALVANIZED REBAR BY NEUTRON DIFFRACTION
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通过中子衍射评价热镀锌钢筋钢筋混凝土的粘结性能
DOI：
10.3130/aijs.86.1026
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
M. Kanematsu
中科院分区：
文献类型：
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作者：
Kensuke Kobayashi;H. Suzuki;Yuhei Nishio;M. Kanematsu
在压、拉、弯剪三种应力场作用下，对热镀锌钢筋与钢筋混凝土（RC）试件的粘结性能进行了评价。在MLF、J-PARC中，利用TAKUMI中子衍射仪，对钢筋与混凝土之间的粘结应力进行了非接触、非破坏性的评估。结果表明，与普通钢筋相比，热镀锌钢筋在混凝土中的轴向应力分布在各种应力场下均表现出相似的趋势。因此，热镀锌钢筋的粘结性能与普通钢筋相当。钢筋混凝土的结构性能是通过钢筋与混凝土之间的粘结应力来实现的。以往的研究认为，钢筋锈蚀会导致钢筋与混凝土粘结性能的降低。为了提高钢筋的耐腐蚀性能，热镀锌钢筋作为钢筋混凝土防腐技术之一得到了发展和应用。热镀锌钢筋是指在钢筋表面镀上一层薄的热镀锌层。另一方面，目前尚不清楚镀锌层在钢筋与混凝土之间的粘结是否受拉，采用衍射法测量了沿着钢筋埋入混凝土的剪切应力分布。中子衍射法测量完全无损非接触衍射渗透率评价应力深度的实验研究在工程衍射仪上进行，
An evaluation of bond performance of the reinforced concrete (RC) specimen with hot-dip galvanized rebar was carried out in three types of stress field: compressive, tensile, and bending and shearing. The bond stress between rebar and concrete was evaluated with non-destructive and non-contact method by neutron diffraction using TAKUMI, in MLF, J-PARC. As a result, compared with ordinary rebar, axial stress distribution on hot-dip galvanized rebar embedded in concrete showed a similar tendency in any types of stress field. In conclusion, it was confirmed that the bond performance of hot-dip galvanized rebar is equivalent to that of ordinary rebar. Reinforced concrete (RC) exerts its structural performance due to the bond stress between rebar and concrete. According to the past research, rebar corrosion is thought to lead to a decrease in bond performance of RC. In order to improve corrosion resistance of rebar, hot-dip galvanized rebar has been developed and put into practical use as one of RC anticorrosion technologies. Hot-dip galvanized rebar is a rebar coated with a thin hot-dip galvanized layer on the surface. On the other hand, it is not clear whether the galvanized in The bond between rebar concrete tensile, shearing measuring the stress distribution along the rebar embedded in concrete using diffraction method. The neutron diffraction for measuring complete non-destructive non-contact diffraction permeability evaluate stress deep of experiments in this study conducted at engineering diffractometer, in