Many finishers have learned the hard way that power troweling air-entrained, normal-weight concrete is extremely risky. Purposely entrained air delays bleeding and increases the possibility of ...

An curved arrow pointing right. This hovercraft-like machine is used to smooth over concrete during construction. The HDX780 riding trowel was developed by Allen Engineering and is used for large ...

Power or machine floating with either blades ... should always be used for exterior slabs. Also, do not trowel air-entrained concrete exposed to winter conditions and to deicing chemicals because ...