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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%.
Freeze-drying, or lyophilization, is like âsuspended animationâ for food. In this process, fresh or cooked food is rapidly frozen and placed in a vacuum. The finished product is substantially lighter and more compact, making it a great option of lightweight backpackers. Virtually any food item and ingredient can be freeze-dried. To do this however, specialized equipment is required, making it a costly option.