Topography studies of concrete abraded with ice

Abstract

Topography studies of concrete-ice abrasion were made to proceed in our understanding of the mechanisms of concrete wear by ice on Arctic offshore structures.The effects on various initial surfaces of a B75 normal-weight concrete (smooth, rough, sawn) and on the sawn surface of a LB60 lightweight concrete were studied during concrete-ice abrasion experiments. The degradation of a concrete surface appears mainly as valley formation resulting from air voids opening, or aggregate protrusion and cutting

Photocatalysis of functionalised 3D printed cementitious materials

“…On the other hand, the kurtosis (S ku ) was significantly higher than 3 for the reference specimens, which demonstrated the higher weight of the tails distribution (i.e. steep or sharp tails of valleys and peaks) in the scanned surface area [52,53]. Nonetheless, the kurtosis (S ku ) values for TiO 2 coated series were lower than (but quite close to) 3, which demonstrated a lower distribution sharpness of the tails obtained on the scanned surfaces by adding the nano-TiO 2 particles onto the surface.…”

Case study on the mineralogical and petrophysical analysis of reinforced concrete slabs of a highway viaduct of the S.G.C. Orte-Ravenna

“…2b, d, f and h). In these images, you can see the areas where the heat is most accumulated and emitted to a greater extent (warmer areas); these correspond to the areas where the asphalt layer has been completely removed due to degradation, which can be caused by different factors: atmospheric conditions [55,56]; chemical and physical attacks [57,58]; friction due to the movement of cars [59]. Related to the physical deterioration, the effects of temperature on the structural quality of the concrete slabs (micro-cracking and micro-cracking) were also observed [60,61], because the cyclic variation of the temperature causes granulometric disintegration of the concrete [62].…”