This work aims to study the possibility of using recycled sand to prepare an epoxy resin mortar mechanically resistant and resistant against chloride ions diffusion. Comparative studies were performed on standardized hydraulic mortar and epoxy / standardized sand. The effect of the incorporation of a thinner, methyl octanoate, on the workability, mechanical properties and durability of the epoxy resin mortar is analyzed. It appears from this study that investigated mortars have a workability which is improved with the increase in the percentage of resin and with the addition of thinner. The total substitution of standardized sand by recycled sand alters this property. The resin mortar have a lower porosity than the hydraulic mortar, better mechanical properties and better resistance to chloride ions diffusion regardless of sand nature. The total substitution of standardized sand by recycled sand does not significantly affect the mechanical properties of resin mortars having the same binder percentages (20%). However, it causes a slight decrease in the resistance to chloride ions diffusion attributed to a higher total porosity accessible to water for recycled sand mortar. Similarly, the migration of these ions into mortar decreases with increasing the resin percentage, decrease attributed to the lowering of total porosity. Thinner addition affects the apparent diffusion coefficient.
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