A concrete screed is a long board, often cut from dimensional lumber, which is used by two or more workers to level the surface of wet concrete. A concrete screed levels the surface of flat concrete. Concrete screeds are great for leveling a concrete floor or striking off poured concrete.
Mechanical Wet screeds were prone to high maintenance, especially in connection to drive mechanisms between the engine and exciter. Most concrete screed and screed bar combinations produce irregular vibration along the length of the screed bar. Not only is the concrete screed exposed to highly variable levels of vibration but cream levels vary from spot to spot along the screed bar. The back-to-back triangular construction of the concrete screed is extremely rigid and minimizes variability in the transmission of vibration. Hardware threads are compromised by the concrete screeds and assembling or removing the screed becomes such a problem that crews often don't disassemble for cleaning or transport.
Concrete power screed is the World's Lightest Weight Power concrete screed. After the concrete is dumped into flat-work forms and spread out with shovels or concrete rakes, it's time to use a power screed. Smoothing out wet concrete screeds is hard work and the wider the pour is, the more difficult it will be. Allow a bit of the board to extend past the form at each side for the screed operators to grab. At the same time, each worker will employ a sawing motion, back and forth with the concrete screed board to smooth the wet concrete. When a low area appears, stop screeding and as soon as the void is filled, lift the screed and go back and re-screed that area again.
The movement of the concrete screed back and forth will get small bits of gravel in the concrete to settle downward while moisture and air bubbles will rise to the surface of the wet concrete, making the final product stronger. If you've decided to pour the concrete screed yourself, you will save some money, but be prepared and knowledgeable before you begin. Formed pour area Shovels or concrete pulls. Pouring concrete screed takes a lot of muscle and endurance, as you work against the clock to smooth it before it hardens. When the driver arrives on your property, ask to see the texture of the concrete.
Push the chute back and forth to allow the concrete screeds to reach the edges. Instead of using the shovel in a digging manner, reach out with it and allow it to fall on its backside on the concrete, sinking in slightly and then pull it towards you. With at least one person on each end, position the screed at the highest end of the pour and work downwards. All concrete screeds have a slight slope to allow for drainage.
In a straight forward and backwards motion, push and pull the float across the wet concrete. When the concrete screed is relatively smooth, switch to the finish float to fine tune the surface, with the edge trowel, work it back and forth between the form and the concrete screed to create a clean, rounded edge. Pour concrete screeds during warm days for the best results. If the weather is cold, ask the screed company to add calcium to the mix to assist in drying. In hot weather, have a garden hose ready and lightly sprinkle the concrete screed once it has hardened. Don't soak it you can do this to help "temper" the concrete over the next few days.