For a floor that will be hard-troweled, if the concrete bleeds too much and delays finishing, switching to air-entrained concrete is recommended.

For a floor that will be hard-troweled, if the concrete bleeds too much and delays finishing, switching to air-entrained concrete is recommended.

• A. True
• B. False
• C. Not recommended
• D. It depends

Answer: (B)

Bleed control is crucial when you plan a hard-troweled floor because surface bleed creates laitance and can delay achieving a tight, dense finish. Air-entrained concrete adds microscopic air voids to improve freeze–thaw resistance and workability, but it does not address the bleed problem in a way that helps a hard-troweled surface. In fact, the additional surface voids can compromise the density and smoothness of the final top layer, making finishing harder and often producing a less desirable surface appearance. So switching to air-entrained concrete is not a recommended fix for excessive bleed. Instead, use anti-bleed admixtures, adjust the mix to lower the water content or slump, or align finishing timing with the bleed rate to achieve the desired hard-troweled finish.

Bleed control is crucial when you plan a hard-troweled floor because surface bleed creates laitance and can delay achieving a tight, dense finish. Air-entrained concrete adds microscopic air voids to improve freeze–thaw resistance and workability, but it does not address the bleed problem in a way that helps a hard-troweled surface. In fact, the additional surface voids can compromise the density and smoothness of the final top layer, making finishing harder and often producing a less desirable surface appearance. So switching to air-entrained concrete is not a recommended fix for excessive bleed. Instead, use anti-bleed admixtures, adjust the mix to lower the water content or slump, or align finishing timing with the bleed rate to achieve the desired hard-troweled finish.