What test measures the resistance of aggregate to freeze-thaw cycles?

The Freeze-Thaw Durability test is specifically designed to assess how well aggregate materials can withstand the stresses of freezing and thawing cycles. This test simulates the conditions that aggregates are likely to experience in environments subject to cold temperatures and moisture. It involves repeated cycles of freezing and thawing while monitoring the physical changes in the aggregates, such as cracking and degradation.

This test is critical for understanding the long-term performance of aggregate in concrete and other construction applications, particularly in regions that experience significant temperature fluctuations. It provides valuable information on the material's durability and helps ensure that the aggregates used in construction will maintain their integrity over time despite environmental changes.

The other options, while important in their own right, do not measure freeze-thaw resistance. The Particle Size Distribution test determines the size range of aggregate particles, the Specific Gravity test assesses the density of the aggregate, and the Atterberg Limits test evaluates the plasticity characteristics of soils. None of these tests provide insights into the freeze-thaw behavior of aggregates.