Study of water intrusion in admixture concrete using neutron backscattering technique

This work aims to study the water infiltration in ordinary concrete with different percentages of super-plasticizer (SP) varied from 0.25% to 1.5% of cement weight. It was performed by measuring thermal neutrons backscattered from the investigated samples. Dynamic measurements were carried out by fixing the sample on a transfer table in front of the neutron beam exit. A slit collimated beam of neutrons emitted from 252Cf was hit on which surface of the sample water did not infiltrate through it and along the flow direction.