What is the significance of the air void content in asphalt mixtures?

What is the significance of the air void content in asphalt mixtures?

Step 1: Understand what air void content means. It refers to the small spaces or bubbles in the asphalt mixture that are filled with air.
Step 2: Recognize that air voids are important for the performance of asphalt. They help with flexibility and prevent cracking.
Step 3: Learn that if the air void content is too high, it can weaken the asphalt, making it more likely to break or fail.
Step 4: Understand that if the air void content is too low, it can trap moisture, leading to damage from freeze-thaw cycles.
Step 5: Conclude that maintaining the right amount of air voids is crucial for the durability and longevity of asphalt surfaces.

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