To answer this question, we need to define a bond breaker and examine how. For wet concrete applications all excess or standing water must be displaced and concrete must then dry. Dayton superior j6 sure lift bond breaker water base 55 gal. The secret to fixing wide concrete cracks is to undercut the sides of the crack to give it an inverted v shape. Deckofoam concrete construction products manufacturer.
Characteristics advantages easy application by brush or sprayer non hazardous, non toxic non staining does not interfere with concrete placements can be used as mould release agent as well product information. While its use is not required, his checklist has been prepared to provide the field inspector with t a summary of easytoread stepbystep requirements relative to the proper construction of pavement patching section 442 of the standard specifications. This is also true of floor repairs, if concrete is used to fill gaps caused by damage. They also protect the patch from damage caused by deflection under traffic. Distribute the concrete evenly to avoid the need of excessive shoveling. A bond breaker should always be used between concrete pavement and cement treated base. Clean lift 2020 premium reactive waterbased tiltup cure bond breaker a chemically reactive water. Proper profile should follow the standard established.
Figure 1019 shows the dowel bar assembly used for dbr with a joint reformer, endcaps, and chairs. The cement within a concrete mix doesnt contain any natural bonding agents so when fresh concrete is added on top of an existing layer of concrete, the two wont join together. Once the panels were in place, the crew went to town pouring the new concrete onto the taxiway lanes, finishing paving in four days. We are also one of the largest private label epoxy manufacturers in the united states and some of the most respected companies throughout the world have come to rely on atc. Tds thick concrete repair large hole patching product deep. When mixed, its creamy consistency provides an excellent concrete wash, parging material for concrete walls, precast concrete elements, castinplace concrete, or existing concrete or block. Materials and procedures for rapid repair of partialdepth. Polystyrene or polyethylene joint bond breakers are placed flush with the pavement surface, between the new nonflexible concrete and the adjacent slab to reduce the risk of compressionrelated failure. It also serves as a sealant bondbreaker and provides a costeffective alternative as an expansion joint in all concrete paving projects. The nonmembrane forming bond breakers can be further categorized into reactive types and nonreactive types. Acid test with a strong reaction at the crack in the concrete surface. Easylift e is applied to the concrete casting slab to efficiently prevent the bonding of subsequent concrete pours. Suitable substrates oncrete, masonry, metal and wood substrates. Bond breakers and their effective use concrete construction.
It is used to bond two layers of concrete together, and also acts as a moisture vapour barrier between the two layers. This helps the repair material to key into the crack, creating a mechanical bond in addition to the chemical bond between the patch material and the concrete. Deckofoam expansion joint filler is a flexible, lightweight, nonstaining, polyethylene, closedcell expansion joint filler. Su c h bond breakers and their effective use guidelines to prevent stuck panels and aggravation liftslab. Our bond breakers are formulated to leave no residue, stain, or discoloration, and contain no diesel, kerosene, waxes, or silicones. No matter what your epoxy needs are, from concrete floor repair, concrete wall repair, epoxy coating. Once cured, the new concrete will simply sit on top as a separate layer. Acid stain reaction will bond breaker inhibit reaction question. The reason for this is that if a pools concrete deck pushes against the copping or bond beam, and there is not a flexible material between the two, the pressure may cause damage. Bond breakers are applied on surfaces that will be eventually joined together since once the concrete is poured, they will be inseparable.
Uses sika bondbreaker w is used for matchcast, tiltup and tiltslab constructions. Types of bond breakers early attempts at bond bre a k i n g i n vo l v ed the use of heavy sodiumbased greases on concrete molds. When it does, you either have to patch it or replace it. Mold configurations generally dictated the need for a stripping lubricant as well as a bond bre a k e r. Deformed bars used in trg joints and lane ties need not be coated with a bond breaker. How to use deep patch is thick concrete repair product for patching large holes in concrete surfaces. Builders tips on how to prevent and repair spalled concrete bandaid over concrete crack, representing concrete crack repairs. Technical data sheet sec section 2 dayton superior. Most substrates only require priming if testing indicates a need or where sealant will be subjected to water immersion after cure.
Aci cement and concrete terminology dayton superior bond breakers. Concrete is a very utilitarian construction material used to create highways, bridge. Bond breakers used in tiltwall construction, however, are specifically. Sure lift j6 is a special formula of propriety ingredients designed to provide clean, easy lifting of tilt panels. Bond breakers eliminate cracking of concrete slabs, due to temperature and moisture variation, and help avoid shrinkage cracks in certain. Specchems industryleading tiltup bond breaker products are chemically reactive and specifically engineered to provide clean and easy lift of tiltup panels. Joint walls must be sound, clean, frostfree, and free of oil and grease. A bond breaker is a material used to prevent adhesion of the newly placed concrete to the substrate. It is a chemicalresistant, ultraviolet stable, nonabsorbent, low density, costeffective, compressible foam that offers an extended service life in both interior and exterior applications. Concrete form release slip form coating, a nasa technology spinoff company 2003. Surecretes thick cement filler is a single component, just add water cement based chemical patching compound system providing a patch that goes from 1\ 8 \0. Roughen the substrate to ensure that there will be a mechanical bond between the patch material and the parent concrete.
Prior to concrete placement, the inspector should confirm that the epoxy on grout has properly set. Fixing acid stains tips on staining concrete the concrete. A bonding agent bonding adhesive needs to be painted onto the existing concrete first to ensure that the fresh concrete will successfully adhere. The new wont adhere to the old without the help of a bonding adhesive. 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. Any concrete must be sufficiently cured to have sufficient hydration, approximately 7 to 14 days depending on temperatures and humidity. Quickdrying reactive vocotc compliant, solventbased bond breaker. The stearates react with the calcium hydroxide lime of the concrete to produce a crude soap fig. Product name tds sds sell sheet esp all shield wb modified silanesiloxane concrete protectant aqua shine high solids, waterbased acrylic sealer berry clean raspberry scented solventcleanerdegreaser bio strip wb concentrate biodegradable, waterbased form release concentrate bio strip wb 100% biodegradable, waterbased form release agent clean lift. Top n bond by sakrete is a polymer modified repair mortar used for patching, repairing and resurfacing cracked or chipped concrete surfaces. Additionally, more bond breaker may be required to get the desired parting affect. Tds thick concrete repair large hole patching product.
Bond breakers form oils and releases surface primers concrete repair and restoration. Because of its excellent bond and freezethaw resistance, meadow patch smoothgrade may be used for interior andor exterior applications. Clean lift 2020 premium reactive waterbased tiltup curebond breaker a chemically reactive water. Griffin concrete repair concrete patching and sealing. Install bond breaker tape or backer rod to prevent bond at base of joint. Used in joint sealing applications to ensure sealant only adheres to two faces of the joint. Sakrete premixed concrete patch can be used directly from the container. Specifications detailed provisions section 03300 castln. Tiltup wall panels will be cast on the floor slab, and the contractor is concerned the bond breaker will inhibit stain reaction. Use for concrete repairs from a featheredge up to 12 inch 1. Bond breakers use and application guide dayton superior. Dec 27, 2018 the secret to fixing wide concrete cracks is to undercut the sides of the crack to give it an inverted v shape. Bond breakers used in tiltwall construction, however, are specifically formulated for that purpose and the chemistry involved with these bond breakers is different than that of other bond breakers. Portland cement concrete works well in mass and provides great compressive strength but not bond.
Polyethylene tape for isolating sealants from concrete and joint fillers. There have been several instances across texas where excessive cracking and premature failures occurred when a concrete slab was placed directly on cement treated base. The bond breaker allows for 2sided rather than 3sided adhesion, which permits much greater elasticity of the sealant. Then, if you want to patch the concrete, apply a thin layer of cement paint, pour a wellmixed concrete patch into the holes, and wipe the surface with a wooden float. The bond breaker maybe polyethylene strip or tape which will not bond to the sealant.
There is nothing in basic portland cement that will act as a bonding agent. Bond breakers are used over concrete surfaces to eliminate or reduce the cracking of slabs due to temperature and moisture fluctuations. Any concrete must be sufficiently cured to have sufficient hydration, approximately 7 14 days depending on temperatures and humidity. Dowel bar retrofit procedures pavement interactive. Joint reformer and endcaps allow movement for the slab to expand into without bearing on the patch or bar. Easylift fd is applied to the concrete casting slab to efficiently prevent the bonding of subsequent concrete pours. Bond breakers also avoid shrinkage cracks on tiltup walls. No system should be placed upon concrete that is flaking, spalling, or has hibernating spalling.
Concrete is marvelous stuff but in time it will deteriorate. Feb 10, 2012 top n bond by sakrete is a polymer modified repair mortar used for patching, repairing and resurfacing cracked or chipped concrete surfaces. A cure and bondbreaker in tiltup, lift slab and precast concrete construction. If used for formwork then the residue must be washed off.
The bond breaker should have a scored top strip as shown in figure 2. Quikrete answers questions from contractors about concrete. Concrete and masonry c substrates must be at least 28 days old. Placing concrete place concrete into the repair area from readymix truck or other mobile batch vehicles. Sure lift j6 is a reactive and membrane forming bond breaker for use in tilt wall construction. A bond breaker is the layer of separator substance applied in different forms between adjoining solid surfaces. Bond breakers and how theyre used the balance small business.
We have a project where the owner would like to install a stained concrete floor in the lobby of an office. Bond breakers are critical components required for tiltup construction techniques, and are cost effective and time saving for large structures. Smooth unsightly surface defects, minor cracks, and holes. Assuming that it is structurally sound the least expensive alternative is to patch it. Form aid is a permanent, environmentally friendly concrete form release coating that will increase the life of concrete forms while providing a longlasting nonstick surface.
The bond breaker allows the patch and the old concrete to move independently. The purpose of the bond breaker was to eliminate stress and subsequent cracking in the overlay that would result from the restraint of the existing concrete. Adheres tightly to sides of properly prepared cracks and joints to help keep out moisture, reducing pavement breakup caused by freezethaw action. Polyethylene tape for isolating sealant and eliminating adhesion to filler boards. Reactive bond breakers usually contain some type of fatty acid in the form of a stearate. The two basic causes for this pressure to occur is that the concrete deck expands, due to heat from the sun. Conlift bond breaker water based construction product parchem. They reason that greater strength and slab densities are achieved via higher cement content. Davis company true bond epoxy, epoxies, concrete floor. Concrete over concrete is a common application for most construction jobs. This premiumgrade bondbreaker contains organic compounds that react with the concrete to produce a water impermeable barrier on the surface of the casting slab. Dayton superior j6 sure lift bond breaker solvent base.
Sakrete top n bond concrete patcher is a polymer modified sand cement repair mortar requiring only the addition of clean potable water. This is usually accomplished by obtaining a properly mixed sample, observing the set and the time required to reach set. A fastsetting concrete repair material for horizontal and vertical applications. Curing compound residues and any other foreign matter must be thoroughly removed.
Easylift e atlas easylift e is a highperformance, chemically reactive, waterbased cure and bondbreaker for tiltup and precast construction. It is used to ensure that there is no adhesive molecular bond between the surfaces. Although good in principle, it is difficult to place bond breaker tape in the bottoms of the grooves such that the tape will not move during application of the sealant. J6 has a fugitive dye for ease of visual inspection during application. Deckofoam is supplied with a convenient, prescored removable strip to provide a uniform sealing reservoir in the joint. For refinishing, patching and general repairs to concretemasonry. Adhesives technology corporation atc is a leading manufacturer of construction and industry related adhesives in epoxies, urethanes, acrylics, ester blends and polyureas. Bond breakers are applied to the forms prior to concrete placement. Sikaflex1a is an elastomeric joint sealant adhesive. Sep 20, 2019 then, if you want to patch the concrete, apply a thin layer of cement paint, pour a wellmixed concrete patch into the holes, and wipe the surface with a wooden float.