Crushing effects on the durability of rocky aggregates used on road surfaces subjected to winter maintenance and extreme climate conditions

The internal structure of a rock is determined by its empty spaces (pores and cracks), which can evolve over time chemical, physical, or biological processes. In construction, these chemical physical processes, their effects in the final products, known as aggregates, are well known, controlled to estimate quality durability. However, intrinsic properties raw material, rock, processes that affect durability during production aggregates poorly studied considered construction. For this reason, evolution two different types used Spanish roads were analyzed. will be also form, measuring water absorption coefficient using mercury porosimetry fluorescence microscopy. To influence both forms, rocks, subjected combined effect temperature variations salt winter maintenance operations on roads. results obtained show crushing quarry increase materials generate new micro-porosity caused microcracking weak areas such schistosity presence previous cracks. Thus, increasing porosity produced has negative impact when they extreme climate conditions.