round concrete slab pouring

Round concrete slab is often used for special purposes, such as storage tanks, grain bin, etc. For small area construction, you only need to set a right formwork, leveling work can be done by hand. But for large area round concrete slab construction, you need not only the right support formwork, but also the right equipment.

battery-roller-screed-for-round-concrete-slab

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Concrete Circle Formwork

Small area – the best small area formwork is butt plastic formwork. You can plan the position of the circular slab on the ground, and then use the plastic template to fix it on the planned ground. This plastic form is very flexible and can be easily jointed. This type formwork is suitable for small area and small thickness concrete slab.

You can calculate the length of the template you need by following the formula: 2*r*3.14 (r is the radius of the circular slab)

plastic-formwork

Large area – large circular concrete slabs are mostly made of wooden formwork. Because large area formwork bending requirements are not very high, so you can plan the position of the construction on the ground, and then follow the general method to set up the formwork. You can also use a modular formwork to cut the circle into a polygon with as many sides as possible.

wooden formwork for circle concrete slab

How To Pour

For small round concrete slabs, you can spread the concrete by hand. The following video explains the specific construction method:

For large areas, the best solution is to use concrete roller screed.

You can also use hiking machinery’s pivot kit, which includes a pre-embedded part buried in concrete and a 360-degree rotary connector.

pivot kit for concrete roller screed

It is fixed at the center of the round concrete slab before leveling. The internal threaded embedment at the bottom remains permanently in the concrete after construction, and the rotary joint at the top can be reused.

The roller screed sweeps over the concrete circular slab as evenly as the hands of a clock. During construction, the concrete pouring edge is always near the roller screed.

Other type screed machines are not easy to control the length of the interface. If it is a slab with a large area that will easily cause cold joint. Battery roller screed can switch the rotation direction at will. You can switch construction in both directions to avoid cold joint altogether.

The joint above the pivot kit is fixed to the screw and the height can be adjusted as needed. When you need a horizontal concrete slab, adjust the roller tube to a horizontal state. If you want a concrete slab with a funnel or a cone shape you can turn the joint up or down.

Conclusion

Through this article I’m sure you have already known how to pour round concrete slab. Small slabs just need to set a right formwork. In addition to setting formwork for a large area circle concrete slab, it is also necessary to select suitable construction equipment.