Trowel finish for Air-Entrained Flatwork
Trowel finish for Air-Entrained Flatwork
(OP)
This problem comes up for me a lot. Most clients don't want a broom or float finish on their exposed flatwork. But when the building is subject to freeze-thaw (Unheated garage, barn, etc.) or when the extra R-Value of AE Concrete is desired, there aren't many other options, as far as I know.
Does anyone have a good solution for finishing AE Concrete where no floor coverings will be applied?
Does anyone have a good solution for finishing AE Concrete where no floor coverings will be applied?






RE: Trowel finish for Air-Entrained Flatwork
Attached is an article on this subject.
RE: Trowel finish for Air-Entrained Flatwork
RE: Trowel finish for Air-Entrained Flatwork
One key to controlling the blistering is controlling the bleed rate relative to the finishing process. While there is an environmental component to this, it can be influence by the placement crew / finishers in several ways.....don't add water at the site, maintain a low water cement ratio, delay the finishing until bleed water is gone.
Most blistering is caused when bleed water gets entrapped below the troweling process. If the finishing crew is "drying" the surface and creating a dense surface (as desired) while there is still a lot of bleed water rising in the mix, then problems will result.
RE: Trowel finish for Air-Entrained Flatwork
Ron- I agree- The real question here is whether under controlled circumstances if a 4.5% Air (+/-) concrete mix can be trowels without compromising the integrity of the surface.
RE: Trowel finish for Air-Entrained Flatwork
RE: Trowel finish for Air-Entrained Flatwork
JAE....exactly!