QUANTIFICATION OF WATER PENETRATION INTO CONCRETE THROUGH CRACKS BY NEUTRON RADIOGRAPHY
Improving the durability of concrete structures is one of the way for contributing tosustainable development of society,and it has also become a crucial issue from anenvironmental viewpoint. It is well known that moisture behaviour in reinforced concrete islinked to phenomena such as cement hydration,volume change and cracking caused bydrying shrinkage,rebar corrosion,and water leakage that affect the durability of concrete. Inthis research,neutron radiography was applied to visualize and quantify the water penetrationinto concrete through cracks. The radiographs were obtained by the TNRF (Thermal NeutronRadiography Facility) installed at a research reactor,JRR-3M,in the Japan Atomic EnergyAgency (JAEA). It is clearly confirmed that TNR can make visible the water behaviourin/near the horizontal/vertical crack and can quantify the rate of diffusion and concentrationdistribution of moisture with high spatial and time resolution. By making a detailed analysis itis observed that water penetrates through the crack immediately after pouring and itsmigration speed and distribution depends on the moisture condition in the concrete.
neutron radiography non-destructive technique crack moisture absorption
Manabu Kanematsu Ippei Maruyama Takafumi Noguchi Hiroshi likura Naoko Tuchiya
Graduate School of Science and Technology,Tokyo University of Science,Japan Graduate school of Environmental Studies,Nagoya University,Japan Graduate School of Engineering,The University of Tokyo,Japan Japan Atomic Energy Agency,Japan
国际会议
The International Conference on Durability of Concrete Structures(2008年混凝土结构耐久性国际学术会议)
杭州
英文
274-282
2008-11-01（万方平台首次上网日期，不代表论文的发表时间）