Length - 03:49 There are several types of hand floats and darbies that are used throughout the finishing process each serving a specific purpose. Generally speaking these hand floats and darbies come in three types of materials: wood, resin (composite), and magnesium. Darbies work the same way as floats except they cover more surface area because they are much longer. The wood hand float is used around the concrete slab's edge to consolidate aggregate and bring the paste to the edge of the slab. The wood float leaves the surface torn, or open, allowing the bleed water to leave the concrete. It is very critical to leave the surface open so all bleed water escapes before it is sealed. The resin or composite float has properties of both the wood float and the magnesium float; meaning it leaves the surface open but not as torn as the wood float. The magnesium floats are often used with concrete that contains air entraining admixtures. This type of float seals the concrete surface trapping both the air and bleed water.
View All Concrete Tool Videos Find a Concrete Contractor 23 Services in 200 Metros -- U.S. and Canada © 2008 ConcreteNetwork.com None of this site may be reproduced without written permission |
||||||||||||
