A float compacts the concrete surface, giving it a smooth look. Putting a smooth, durable finish on concrete is a skill you can only master with the proper set of tools and practice. We’ll show you the tools and how to use them for each step of the concrete finishing process.
What float should I use for concrete?
What’s available: The most common floats for decorative concrete work are made of magnesium, aluminum, or wood. Less common float materials include stainless steel, rubber, and laminated wood or canvas resin. Bull floats have a long handle that you push or pull across large areas of concrete.
How long do you wait to float concrete?
Allow all of the water to disappear before you do anything else. This can take 20 minutes or 4 hours depending on the temperature, humidity and how hard the wind is blowing. After the bleed water is all gone you can get out your steel finishing trowel and put on the final touches.
How many times do you float concrete?
Push the bull float in one direction only across the concrete, keeping its front edge slightly above the surface by raising or lowering the handle. Two or three times is enough. Don’t overwork the concrete or you’ll weaken it by drawing too much sand and cement to the surface.
What is the difference between a float and a trowel?
STEEL TROWELS. Purpose: Used after floating to produce a smooth, hard, dense slab surface. What’s available: Steel trowels look similar to hand floats, except the blades are thinner and the handles are open rather than closed. The key difference among tools is the type of steel used for the blade.
Can you finish concrete without a bull float?
You do not need to wait for bleed water to evaporate on the first pass of the Bull Float or Darbie. On some slabs all that may be required is one pass of the bull float; however on most slabs additional finishing will be required.
When should you Powerfloat?
When to power float concrete
Among the best power trowel finishing techniques, before using it, we recommend stepping on the concrete when it has started to dry. Your surface is ready to power float when your footprint is ¼” deep or a bit less and it doesn’t bleed much water.
What may occur if a slab is floated too soon?
More often, premature finishing or improper first (bull floating) or second floating results in trapping rising bleed water and air below the top surface of the concrete (Image 2). When this occurs, the resulting weak or soft zone below the surface causes the top surface of the concrete to flake or scale off.
Can you just bull float concrete?
A bull float is used to level and smooth freshly poured concrete. Concrete used for visible projects, such as driveways, patios and sidewalks, often requires finishing.
Can you smooth out concrete after it dries?
Can You Smooth Concrete After It Dries? It is possible to smooth concrete after it dries, but in many cases, it requires a fresh layer of concrete over the top of the dried surface. This can allow you to keep the surface smooth and even, even though the concrete is completely dry.
How do you edge concrete after it dries?
These are the 4 steps in how to smooth concrete after it dries:
Remove all imperfections on the surface.Vacuum up all debris and apply the adherent.Apply a new layer of concrete.Sand the surface and wash the concrete.Apply a layer of vitrifier to protect the concrete.
Can I pour concrete over 2 days?
How long you have until you must take into account other considerations for concrete to self-bond; about two hours maximum. After that, it’s way beyond ‘begun’ to set. Your previous pour should have left some rebar sticking out, if you knew it was going to take multiple days pours.
How soon can you walk on concrete after it’s poured?
After 24 hours, you can walk on your newly poured concrete, but avoid dragging your feet, ‘doing the twist’, or allowing your pets to walk on it as their claws can scuff the concrete.
Can you over work concrete?
Overworking the concrete.
Concrete that is overworked can become dry and cracked. Concrete that is overworked before the bleed water has risen to the surface can trap that extra water within the mix, resulting in future problems with scaling.
When should you power trowel concrete?
When Should You Power Trowel Concrete
While standing, the footprints should be between one eighth to one-fourth of an inch. The worker should be able to walk firmly on the concrete without sticking concrete on their boots. When these conditions are met, concrete is ready to be power troweled.
