Bond breakers are classified as membrane forming and non membrane forming.
Concrete to concrete bond breaker.
In both cases the disadvantages of using bond breakers and curing compounds are related directly to the advantages they offer the low or no stick impervious surface.
This premium grade bondbreaker contains organic compounds that react with the concrete to produce a water impermeable barrier on the surface of the casting slab.
The resultant film retains sufficient moisture in the concrete to ensure full hydration of the cement.
A bond breaker is a material used to prevent adhesion of the newly placed concrete to the substrate.
A bond breaker is a substance applied to concrete surfaces to guarantee that there is permanent bonding between the surfaces.
Bond breakers are applied to the forms prior to concrete placement.
When a bond breaker is needed at a construction joint a curing compound form release agent and the like can act as a bond breaker.
Reactive bond breakers usually contain some type of fatty acid in the form of a stearate.
Bond breakers are similar to anti stick material applied on adjacent metallic and nonmetallic substrates such as concrete and steel used in construction projects.
Essential for optimum strength development.
The thinner the new over pour the closer the expansion joints should be.
Membrane cured concrete is typically harder and exhibits a dust free surface with a reduced incidence of drying shrinkage cracks.
The stearates react with the calcium hydroxide lime of the concrete to produce a crude soap fig.
These compounds permit newly cleanly and easily from a concrete casting bed or one another without detriment to the concrete strength or appearance.
Bond breakers are normally used on tilt up walls and precast segments to ensure the right pieces are cast together.
Bond breakers will allow lifting and moving of precast pieces after stripping them from the form.
The main function of bond breakers is to minimize dynamic loads during lifting or stripping of precast members and permit their complete clean separation from casting slabs or molds.
Dragon design in relief.
The non membrane forming bond breakers can be further categorized into reactive types and non reactive types.
Bond breakers are available in several forms such as.
The film can also act as a bond breaker between initial and subsequent concrete pours.
Using a bond breaker will keep the two slabs of concrete separate and the cracks will not mirror up through the new slab.
Forming on a bond breaker i need to pour a 9 inch thick paving slab atop a structural slab but there is a 3 inch cement stabilized sand bond breaker required between the structural slab and the paving slab.
