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Neutron diffraction studies on strain evaluation of rebar in reinforced concrete
The neutron diffraction technique was applied to measure strain distributions in a rebar in a reinforced concrete. At first, absorption coefficients of several kinds of concretes with different compounding ratio of water, cement and aggregate were measured, and it was confirmed that the absorption coefficient of concrete was affected by the amounts of water and aggregate. In addition, it was also clarified by measuring strain change of the rebar under tensile loading that accuracy of the strain measurement in the rebar in the reinforced concrete was not affected by the neutron absorption by the concrete. Secondly, size of anchorage zone was evaluated by measuring strain distributions in the rebar under pull-out loading. The length of anchorage zone measured by neutron diffraction was shorter than that measured by strain gauges. Moreover, detailed strain distributions in the rebar around cracks in the concrete were measured under tensile loading, and it was confirmed that the bond condition between rebar and concrete around cracks could be evaluated using the neutron diffraction technique.
Neutron diffraction studies on strain evaluation of rebar in reinforced concrete
The neutron diffraction technique was applied to measure strain distributions in a rebar in a reinforced concrete. At first, absorption coefficients of several kinds of concretes with different compounding ratio of water, cement and aggregate were measured, and it was confirmed that the absorption coefficient of concrete was affected by the amounts of water and aggregate. In addition, it was also clarified by measuring strain change of the rebar under tensile loading that accuracy of the strain measurement in the rebar in the reinforced concrete was not affected by the neutron absorption by the concrete. Secondly, size of anchorage zone was evaluated by measuring strain distributions in the rebar under pull-out loading. The length of anchorage zone measured by neutron diffraction was shorter than that measured by strain gauges. Moreover, detailed strain distributions in the rebar around cracks in the concrete were measured under tensile loading, and it was confirmed that the bond condition between rebar and concrete around cracks could be evaluated using the neutron diffraction technique.
Neutron diffraction studies on strain evaluation of rebar in reinforced concrete
Neutronenbeugungs-Untersuchungen von Dehnungen an Armierungen in Stahlbeton
Suzuki, Hiroshi (author) / Kanematsu, Manabu (author) / Kusunoki, Koichi (author)
2008
8 Seiten, 9 Bilder, 1 Tabelle, 8 Quellen
Conference paper
Storage medium
English