What is the effect of moisture content on aggregates in extreme temperatures?

The effect of moisture content on aggregates, particularly in extreme temperatures, can indeed lead to a decrease in moisture, which in turn can contribute to the brittleness of aggregates. In cold or extreme hot conditions, any existing moisture within the aggregate can either freeze, leading to potential expansion and cracking or evaporate, causing the material to become drier and more brittle. This change in physical properties is critical as it impacts the durability and strength of the aggregate, ultimately affecting the overall performance of the concrete or mix design that utilizes these aggregates.

Understanding this phenomenon is essential for technicians as moisture content must be carefully managed to maintain the integrity and quality of construction materials, especially when exposed to temperature extremes. In contrast, the idea that moisture content is unaffected or causes uniformity does not accurately reflect the realities of aggregate behavior under varying temperature conditions. Furthermore, while increased moisture might temporarily enhance workability in certain situations, in extreme temperatures, the beneficial effects can diminish or reverse, leading to complications.