Durability of recycled fine mortars under freeze–thaw cycles

The characterisation of recycled fine mortars under frost action was highlighted in this study. Mortars with three different ratios cement (RC), namely (10%, 30% and 50%) along a reference mortar 0% RC were prepared subjected to freeze–thaw (F–T) cycles without air-entraining agents. After 96 F–T cycles, the specimens did not reveal any macroscopic damage; however, changes noticed at microscopic level. pore diameter increased size rehydrated products decreased, especially case 50% mixes. In experimental study, physical (mass loss dimensional variation) mechanical (flexural strength dynamic elastic modulus) behaviour revealed that critical period structural degradation occurred during first 24 cycles.