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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%.
Lyophilization or freeze drying is a process in which. water is frozen, followed by its removal from the. sample, initially by sublimation (primary drying) and. then by desorption (secondary drying). Freeze-. drying is a process of drying in which water is. sublimed from the product after it is frozen [1].