Epoxy Bonding Agent For Old New Concrete

Flexi bond 540 is a two component 100 solids moisture insensitive epoxy bonding agent.

Epoxy bonding agent for old new concrete.

The bonding agent is applied over the existing surface of the concrete so that the new layer of fresh concrete successfully adheres to the old layer. Once cured the new concrete will simply sit on top as a separate layer. This is also true of floor repairs if concrete is used to fill gaps caused by damage. Just as in the process described above after the bonder has become tacky apply a scratch coat and then apply the repair material.

A bonding agent bonding adhesive needs to be painted onto the existing concrete first to ensure that the fresh concrete will successfully adhere. Epoxy based multipurpose bonding agents for use on concrete steel and other substrates. It has a convenient 2 1 mix ratio by astm c 881 90 types i ii iv and v grade 2 class b and c volume with a viscosity similar to heavyweight oil. The most effective way to ensure that the bonding agent gets into the existing concrete is to apply it directly using a brush or rag.

It has a low to medium viscosity. The two main factors that affect the bonding between old and new concrete are. It contains a special polymeric curing agent that provides the. This will not produce a strong serviceable floor.

The bonding sand cement grouts usually consist of 1 part cement 1 part sand and enough water about 1 2 part to form a creamy consistency. Sealbond concrete epoxy adhesive 215 b is a two component adhesive system specially formulated for structural concrete application and bonding of old to new concrete. Aci 503 details the use and specification of epoxies for bonding fresh to hardened concrete. When compounded the admixture produces a strong bond with minimum shrinkage and flexibility properties.

Epoxy based bonding agents are very popular for such operations. This usually takes only a few minutes. Patches and vertical joints. Then apply the repair material.

Chemco systems epoxy adhesives for bonding new concrete to existing surfaces may be applied and distributed by broom brush roller notched trowel squeegee or spray gun depending upon the nature of the surface the size of the area and the scheduling of the concrete placement. Surface preparation and cleanliness of the existing surface strength and integrity of the old surface. When using a liquid bonding agent paint the bonder onto the existing concrete and allow it to dry until it is tacky. In essence the procedure should be wet to wet as the bonding agent should not be allowed to dry before the fresh concrete topping is placed.

Epoxy resin grouts specially formulated for each application also are on the market.