Concrete bonding adhesive is an essential material used in various construction and repair projects. It plays a crucial role in ensuring that new concrete or mortar bonds effectively to existing concrete surfaces. Without a proper bonding agent, the new layer may not adhere well, leading to cracks or failures over time. In this article, we’ll explore how concrete bonding adhesive is used and why it’s an important component in construction.
1. Surface Preparation
Before applying any concrete adhesive, the surface must be prepared properly. The existing concrete surface should be clean and free of debris, dust, grease, or any other contaminants that might interfere with the adhesive’s ability to bond. Contractors typically use a pressure washer, wire brush, or other cleaning tools to achieve a clean surface.
Once the area is clean, it’s also recommended to roughen the surface slightly to improve adhesion. This allows the adhesive to penetrate more deeply into the concrete and create a stronger bond.
2. Applying the Bonding Adhesive
Once the surface is prepared, the concrete adhesive can be applied. Most bonding adhesives come in a liquid form and can be applied with a brush, roller, or sprayer, depending on the size of the area and the type of project. A generous, even coat should be applied to the existing concrete surface.
It’s important to follow the manufacturer’s instructions for drying time and application techniques. Some concrete adhesives may require you to wait until they become tacky before applying the new layer of concrete, while others may need the new concrete to be added immediately after application. Make sure to double-check these details for optimal results.
3. Adding New Concrete
After applying the bonding adhesive, the next step is to pour or spread the new layer of concrete or mortar. This can involve patching small cracks, resurfacing an entire floor, or creating new additions to an existing structure. The adhesive helps ensure that the new concrete adheres to the old surface seamlessly, creating a durable and long-lasting bond.
Without a proper adhesive, the new concrete might not adhere well, leading to peeling, cracking, or structural weakness. This is especially important for large projects like floors, driveways, or retaining walls, where the stability of the structure is critical.
4. Common Applications
Bonding adhesive is commonly used in a variety of applications, including concrete patching, resurfacing, and repairs. It’s also used in construction projects where new concrete needs to adhere to an old surface, such as when building extensions or adding layers to existing concrete slabs.