Quality inspection method for concrete structures, concrete inspection equipment, and manufacturing method for concrete structures

摘要

PROBLEM TO BE SOLVED: To provide a quality inspection method for a concrete structure using a small measuring device that can be used at the time of construction. SOLUTION: In a method for quality inspection of a concrete structure using neutrons emitted from a neutron source 11 as a radiation source, a neutron source using a radioisotope and a thermal neutron 165 arranged adjacent to each other are used. The detection tube 15 for detection is pressed against the surface of the concrete piece 120 to be detected, and the fast neutron 160 emitted from the neutron source collides with the hydrogen atom 150 existing inside the concrete piece to generate energy. The detection tube 15 detects what has been reflected, counts the number, and aggregates the data obtained from the detection tube with a data logger, which is a calculation means, to detect voids in the concrete piece. To do. [Selection diagram] Fig. 1