[3M08-11] Shielding Material

[3M08] Nondestructive Determination of Water Content in Concrete Using Am-Be Neutron Source – Experimental Verification -

*Yoshihiro Miyaji¹, Isao Murata¹, Huminobu Sato¹, Singo Tamaki¹, Sachie Kusaka¹ (1. Osaka Univ.)

Keywords:nondestructive determination technique, water content, neutron source, gold foil, concrete

A new nondestructive measurement technique was developed to evaluate the amount of water in concrete. A concrete wall is irradiated with fast neutrons to activate a gold foil set on the concrete. By evaluating in advance the relation of the gold activity and water content by calculations, we can determine the water content in the concrete, the water content of which is not known. In this study, to validate the present technique experiments were performed with simple concretes made from only cement and water. The water contents are different among them. It was confirmed from the experiments that water content could be estimated by the present nondestructive measurement technique even for simple system only with cement and water.