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Test results indicate that salt has a significant effect on the low temperature performance of asphalt binders; Freezeâthaw is a main influencing factor when the percentage of salt is less than 3%, and the erosion effect of salt accelerates the failure of asphalt mixtures when the percentage of salt is more than 3%.
The process of which freeze-thaw or physical weathering takes place is rather simple. Firstly, water would get into cracks on a rock or hard material, and overnight, it woulâ¦d freeze. Secondly, because when water freezes, it expands, it therefore forces itself further into the rock; the crack is made larger.