This paper aims to quantitatively examine the effect of sodium chloride (NaCl) on the frost-induced mechanical deterioration of mortar. After the freeze thaw cycles (FTCs), the mechanical properties of sealed specimens (70 × 30 × 5 mm) saturated with NaCl solutions were investigated. As found, the specimens with a lower water-to-cement ratio (W/C) show no clear reductions in their flexural strength and elastic modulus, while those with a higher W/C degrade gradually with increasing numbers of FTCs, even for specimens exposed to high NaCl concentrations. The connectivity of the specimens increased significantly with increasing numbers of FTCs for the pure frost damage case, whereas this variation was minimal for the case of frost damage incurred with higher NaCl concentrations. For the specimens exposed to higher NaCl concentrations, the destructive salt crystallization pressure under freezing was the main contributor to the salt frost damage and was largely attributed to the reversible formation of Friedel's salt.

本文旨在定量研究氯化钠（NaCl）对霜冻引起的砂浆机械劣化的影响。冻融循环（FTC）后，研究了用NaCl溶液饱和的密封试样（70×30×5 mm）的机械性能。如发现的那样，水灰比（W / C）较低的试样的抗弯强度和弹性模量没有明显降低，而W / C较高的试样甚至随着FTC数量的增加而逐渐降解。暴露于高浓度的氯化钠中。在纯霜冻情况下，样品的连通性随FTC数量的增加而显着增加，而在NaCl浓度较高的霜冻情况下，这种变化最小。对于暴露于较高NaCl浓度的样品，