How to treat floor amour joints with epoxy flooring

We all know that the finished effect of epoxy flooring is seamless. Therefore, when constructing epoxy flooring, it is necessary to deal with some expansion joints on the concrete floor. No matter how good the quality of the materials used to construct the epoxy floor coating is, after one year, it will experience thermal expansion and contraction. If the original concrete floor cracks, the epoxy floor layer attached to the upper layer will also crack. Therefore, it is even more necessary to handle the expansion joints properly. To avoid project quality disputes. Because we often decorate large areas of workshop floors, our company has accumulated a lot of construction experience, so we also have some methods on how to deal with expansion joints. Today we list these construction plans for your reference.

1. Fill the expansion joints with epoxy resin mortar material, and then carry out construction according to the original plan we designed for the customer. However, this method cannot guarantee that the floor coating at or near the expansion joint will not crack and peel. Because the epoxy mortar material is inelastic and cannot resist the stress when concrete shrinks and cracks, cracking on the ground cannot be avoided in the end.

2. After the epoxy floor is completed, use a cutting machine to cut a 2-5mm wide expansion joint at the original expansion joint position, then clean up the debris in the joint, and then use an elastic material (such as polyurethane elastic glue) to seal the expansion joint. The seams are filled. During this process, care should be taken to avoid contamination of the outside of the seams with glue. Finally apply the epoxy midcoat and topcoat. The filling of elastic glue needs to be to a certain depth, otherwise the elastic glue may not be firmly attached to the concrete and may detach. Compared with the first method, the second treatment method is that because the elastic glue disperses the stress caused by the shrinkage of the concrete, the possibility of cracking of the coating on the expansion joints is greatly reduced. The overall color of the ground is consistent, but due to the coating on the elastic glue It is still rigid. When the concrete shrinks more severely, the floor coating (middle coat and topcoat) on the elastic glue may crack, but the cracks will not be large.

3. When constructing the floor, try to keep the expansion joints first, cover them immediately, and record the location. Then after the floor painting is completed, cut the expansion joints neatly and make sure the width is above 5mm. It is best to modify them. Make it into a trapezoid shape with a wide top and narrow bottom, then clean the dust and debris in the seam, stick tape on both sides of the seam, use polyurethane elastic glue to fill the gap until it is straight, and remove the tape when the elastic glue is half dry. The third method is often used in electronics factories and pharmaceutical factories that have high requirements for cleanliness and aesthetics. It can basically avoid the cracking of the floor coating at the expansion joints and make the floor more beautiful. Disadvantages of this method: Because the polyurethane elastic material has relatively few colors, it is difficult to achieve the same color as the overall floor coating.
4. Local expansion joints on the ground are often paved with fiberglass cloth to enhance crack resistance. The construction method is: first fill the expansion joints flat with epoxy clay pot slurry material, then apply primer material, and then paste it. Apply 1-2 layers of glass fiber cloth with a width of about 10mm, and then roll-coat the middle coating material, top coating, etc.

This method can not only ensure that the overall color of the ground is consistent, but also resist cracking caused by concrete shrinkage. However, if the design thickness of the floor coating is too thin, it is difficult to operate, and the ground where the application is applied is prone to be higher than other places. Therefore, at least epoxy floors above 2MM will adopt this solution.

Note: The parameters provided in this document are for reference only and are not mandatory. Due to differences in technical characteristics between different brands and models of laser levelers, please consult the manufacturer for a suitable solution before actual operation. This reference document assumes no responsibility for any issues arising from failure to follow the manufacturer's instructions.

Thanks to all the friends who support and trust Shandong Vanse Machinery Technology Co., Ltd.

If you want to know more about Shandong Vanse Machinery Technology Co., Ltd. or have any questions, please feel free to contact us:
• Tel: +86-13639422395
• Email: sales@vanse.cc
• Website: www.vansemac.com