Bonding Agents & Admixtures | BaseTec

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High quality Bonding Agents & Admixtures products

Concrete additives such as bonding agents, or concrete bonding adhesives, include a choice of different products and materials that can be effectively used to create a strong bond between new and old concrete surfaces. This allows the two concrete surfaces to effectively become one. As a result, concrete bonding agents are an important step in project such as concrete repair, bonding new concrete to old concrete, reinforcing construction joints, or creating a strong bond for a sand-cement repair mortar.

Different Types of Concrete Bonding Agents and Adhesives

Acrylic bonding agents are primarily used to bond fresh concrete with the surface of old concrete. Milky white in colour, acrylic latex bonding agents are usually quickly and easily applied directly to the existing concrete surface by brush, trowel or roller.

Styrene Butadiene (SBR) bondng agents are made up of polymers and co-polymers that are compatible with cementitious compounds and usually contain approximately 55% solid content. SBR bonding agents can be used for bonding fresh concrete to old concrete, as a surface primer and sealer, and as an admixture to provide improved flexiblity and tensile strength, and reduced shrinkage, to concrete and mortar mixes.

Polyvinyl Acetate (PVA) bonding agents are mainly used for providing a strong bond with cement-based mixes when carring out repair works in concrete. Howver, it also has applications in plastering, tiling and carpentry, providing an excellent bond for many common building materials.

Why Do You Need a Concrete Bonding Agent?

By using a bonding agent between different concrete surfaces, it ensures that the finished concrete structure is more structurally sound than if the two areas of placed concrete had no bond between them. As the cement within a concrete mix does not contain any natural bonding agents of its own, simply applying fresh concrete on top of or alongside existing concrete will not create a permanent join between the two surfaces, making them more susceptible to structural issues, as well as more prone to allow water or gas to enter.

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Frequently Asked Questions About Bonding Agents & Admixtures

What is a concrete bonding agent, and what does it do?

A concrete bonding agent is a substance applied to the surface of existing concrete before the placement of new concrete. It helps create a strong bond between the old and new concrete, preventing delamination and enhancing overall structural integrity.

How does a concrete bonding agent work?

Concrete bonding agents work by penetrating the pores of the existing concrete surface and forming a chemical bond with the new concrete. This bond ensures proper adhesion and prevents separation between the old and new concrete layers.

When should I use a concrete bonding agent?

Concrete bonding agents are typically used in situations where new concrete is being applied to an existing concrete surface, such as repairs, overlays, or patching. They are also useful when bonding fresh concrete to cured concrete or other substrates like masonry or metal.

Can concrete bonding agents be used on all types of concrete surfaces?

Concrete bonding agents are suitable for use on most concrete surfaces, including vertical, horizontal, and overhead applications. However, it’s essential to ensure that the surface is clean, structurally sound, and free from contaminants that could inhibit bonding.

Are concrete bonding agents compatible with other concrete additives or admixtures?

Concrete bonding agents are generally compatible with most concrete additives and admixtures. However, it’s advisable to consult the manufacturer’s recommendations and conduct compatibility tests when using multiple products together.

How do I apply a concrete bonding agent?

The application method for concrete bonding agents may vary depending on the product and the specific project requirements. Typically, bonding agents are applied by brushing, spraying, or rolling onto the prepared concrete surface before the application of new concrete.

Do concrete bonding agents affect the curing time of concrete?

Concrete bonding agents generally do not significantly impact the curing time of concrete. However, it’s essential to follow the manufacturer’s recommendations regarding application procedures and curing practices to ensure optimal bond strength and performance.

Can concrete bonding agents be used in cold weather conditions?

Some concrete bonding agents are formulated for use in cold weather conditions, while others may have temperature limitations. It’s essential to check the product label or manufacturer’s instructions for guidance on temperature requirements and application procedures in cold weather.

How long does a concrete bonding agent take to dry before applying new concrete?

The drying time for a concrete bonding agent can vary depending on factors such as temperature, humidity, and surface porosity.

Can concrete bonding agents be used for repairs on vertical surfaces?

Yes, concrete bonding agents are suitable for repairs on vertical surfaces, including walls, columns, and other structural elements. Proper surface preparation and application techniques are essential to ensure adequate bonding and long-lasting repairs.

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