This is also true of floor repairs if concrete is used to fill gaps caused by damage.
Epoxy bonding agent for old new concrete.
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.
Flexi bond 540 is a two component 100 solids moisture insensitive epoxy bonding agent.
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.
The two main factors that affect the bonding between old and new concrete are.
Then apply the repair material.
Application of flexi bond 540 to wet or dry properly prepared substrates assures tenacious adhesion of new toppings patching compounds and tile bedding mortars when used in accordance with instructions.
Once cured the new concrete will simply sit on top as a separate layer.
A bonding agent bonding adhesive needs to be painted onto the existing concrete first to ensure that the fresh concrete will successfully adhere.
This will not produce a strong serviceable floor.
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.
Epoxy based bonding agents are very popular for such operations.
When using a liquid bonding agent paint the bonder onto the existing concrete and allow it to dry until it is tacky.
Aci 503 details the use and specification of epoxies for bonding fresh to hardened 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.
It is recommended that bonding agent is applied prior to casting the fresh concrete.
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.
This usually takes only a few minutes.
Epoxy resin grouts specially formulated for each application also are on the market.
Patches and vertical joints.
Epoxy fresh concrete to hardened concrete adhesive 2007 is a two component 100 solids epoxy resin system designed to bond new concrete to old and other materials to concrete.
When compounded the admixture produces a strong bond with minimum shrinkage and flexibility properties.
It contains a special polymeric curing agent that provides the.
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.
Just as in the process described above after the bonder has become tacky apply a scratch coat and 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.
