What Is The Purpose Of A Bull Float?

Do you need to float concrete?

Floating has to be done on virtually every concrete job after concrete is poured and leveled.

(Leveling is usually accomplished with a screed.) When done properly, floating pushes the aggregate down into the concrete and encourages moisture to rise, helping the concrete dry and creating a smoother surface..

What happens if you dont float concrete?

If the concrete isn’t kept moist for a few days it may crack. The problem is that the surface will dry out while the bottom is still wet causing tension, which basically tears the concrete apart.

When should I brush my concrete?

When it comes to brooming, timing is critical—brush too early and the surface will be weak, brush too late and there won’t be enough texture. It must be done while the slab is still soft, but after the bleed water has dissipated. Depending on the weather, this can take anywhere from 20 minutes to 4 hours.

Can you finish concrete without a bull float?

Fresnos are used for troweling slabs that do not require a hard trowel surface. A Fresnos will speed up the troweling process. Fresnos should not be used as bull floats. Troweling can also be accomplished by machine.

What defects can be caused by bull floating 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.

When should I start bull floating concrete?

Darbying or bull floating should be done immediately after “screeding”, or after the concrete has been tamped if tamping was done. This process should be finished before excess moisture or bleedwater appear on the surface.

What does troweling concrete do?

Purpose: Used after floating to produce a smooth, hard, dense slab surface. … Putting a long handle on the trowel allows finishers to trowel the concrete without walking out onto the slab.

Why does magnesium float on concrete?

Magnesium smooths the surface of fresh concrete and opens the pores for proper evaporation, all without pulling the surface like a wood or resin tool. Most magnesium floats are extruded or cast. … Molten magnesium can be cast into any shape desired.

Is a bull float necessary?

Once the screeding is complete, our team uses something called a “bull float.” While the name sounds kind of funny, finishing your concrete with this tool is extremely important. It helps the “cream” rise to the top of the concrete surface, creating a strong, beautiful finish!

What is the difference between a trowel and a float?

A float has a thicker base than a trowel and is usually made of plastic, sponge, rubber, wood or magnesium – a lightweight pale grey metal. It’s used to even up the surface on plaster or concrete, make it firmer and give whatever texture is required.

What is the difference between a Fresno and a bull float?

A fresno is a large, long-handled trowel that looks similar to a bull float, except the blade is made of tempered or “blue” steel. … In fact, most manufacturers refer to a fresno as a fresno trowel. Just like a steel trowel, only use a fresno after the surface has been floated with a wood or magnesium float.