Microscale sedimentary transport phenomena reveal the origin of delamination in an industrial floor

This paper describes the occurrence of mass-transport sedimentation phenomena observed at microscale in a recently constructed industrial floor of ∼3000 m 2 suffering from delamination over a large part of its area. These phenomena (e.g., slumping, debris sliding) occurring on the delamination surface, together with collapsed air voids and a pronounced segregation and layering, indicate that the delamination formed in an early, semiplastic state of the concrete when it was still not set, and was initiated by the (combined) compacting and finishing process.