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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 vs. Freeze Drying. Lyophilization and Freeze Drying are synonymous. Freeze Drying is a water removal process typically used to preserve perishable materials, to extend shelf life or make the material more convenient for transport. Freeze-drying works by freezing the material, then reducing the pressure and adding heat to allow the frozen water in the material to sublimate.