Float pans, also known as float disk, are circular attachment to the power trowel bottom which will be clipped on the trowel blades. Floats are used for the initial step of polishing of the fresh concrete. These disk are widely because it can be a good tool for the transition from wet concrete to dry concrete while floating, it can also give a flatter appearance of the floor and it can increase the productivity during floating.
So how do you attach the float pan? Float pans have a clip angles for the purposes of attaching it to the blades. For the attachment, lay the pan flat to a surface, turn on the power trowel and use a slow rotation for the blades to engage with the float pans. Once the pans are clipped to the blades, it can now be use for floating.
How to use the float pans? Float pan bottoms can be of two types, the flat and the slightly curved. The slighty curved float pan clearance from the slab is very little, an inch to the edges of the float pan and the inside curve can vary from 3 to 4 inches.During the floating, always start the floating perpendicular to the screeding direction and manuever the trowel perpendicular to the previous direction. Floating, considering both the direction, creates a more flat and leveled finish compared to focusing on one direction and make the changes in the level after the floating which takes time.
Another would be, consider the speed and the number of passes during the floating. Technically, the number of passes depends on the concrete slump, the admixtures, the weather as well as the desired finish of the slab. Usually, it takes 4 or more passes to get the desired finish. While with the power trowel speed for floating, always consider using the minimum speed during the start so you can control the direction and movement of the power trowel. Directly using the maximum speed of the power trowel may cause to damage the fresh concrete which takes more time and more works to be done.
The float pan sizes varies and are sized to fit the power trowel. The diameter can range from 24 to 48 inches and have a gauge from 10 to 12.
For the beginners, it is best to use the flat float pan as using the slightly curved float pan can create a wavy finish if used unsupervised and with little to no experience. Once, you have adjusted and know how to control the power trowel, slightly curved float pan can be used.
Float pans are important because it lessens the bumps and voids on the finished concrete slab, to compact the concrete and aggregates and adjust the imperfections of the finished slab.