Commonly called bugholes, surface air voids are small, regular or irregular cavities, usually less than 5/8 inch in diameter, caused by entrapment of air bubbles in the surface of formed concrete.

How to Vibrate Concrete. 1. Deposit concrete with a maximum lift thickness of about 20 in. Make lifts as level as possible and do not use the vibrator to move concrete horizontally.

Air-entrainment and recycled brick aggregate in concrete enhances freeze-thaw performance, providing a durable alternative ...

TRB hosted a webinar on Tuesday, October 26, 2021 from 1:00-2:30 PM Eastern that investigated requirements for the air-void system parameters of concrete used in highway pavements and structures.

Large concrete floors found within high-rises contain a grid of steel beams, or rebar, for support, and weigh a significant amount. Using voids to reduce the amount of concrete decreases the ...

Microspheres are unlike air bubbles that can be easily popped or destroyed, and the 1%-by-volume admixture is up to 30% stronger than air-entrained concrete, which uses between 4% to 7% air.