What does the "Soundness Test" evaluate in aggregates?

The Soundness Test evaluates the resilience of aggregates under freeze-thaw conditions. This test helps determine how well aggregates can withstand the effects of temperature changes that cause them to expand and contract. When aggregates go through cycles of freezing and thawing, they can be subject to physical changes like scaling, cracking, or breaking down, which can impact the durability of the concrete they are used in.

Assessing the soundness of aggregates is crucial for ensuring the longevity and integrity of concrete structures, as aggregates that fail this test can lead to premature deterioration. By identifying aggregates that can survive these severe environmental conditions, construction professionals can make informed choices about which materials will perform better in various climates and applications.