The pulloff test for concrete patch repairs and maintenance

Sealgreen concrete patch repair is a cementitious stainable material design for grouting small hairline cracks, divots created from the removal of wood carpet strips, and small holes in interior concrete floors. Repair to concrete structures often involves breaking out cracked concrete and replacing this and areas of spalling with a mortar or concrete. Looking for dry fast white concrete patch and repair, 10 lb. Pulloff adhesion testing for concrete repairs magazine of concrete. Watch the video to learn why contractors, homeowners, and thousands of satisfied customers choose unique for quick fixes and challenging repairs. Special concrete resurfacers will make a concrete floor look like new. Adhesion of the new patch to the original concrete is generally considered to be an important criterion in. Type b type b repairs generally consist of partial depth milling or chipping to remove deteriorated or delaminated concrete and preparation and placement of the repair. Concrete breakers can be used to remove concrete before patch repairs are carried out but care must be taken to avoid fracturing of remaining concrete.

E74 practices for calibration and verification for forcemeasuring instruments. Permanent solutions to all types of concrete patching including industrial concrete patch applications, repairing and resurfacing needs as well as a versatile product line featuring concrete floor patch, wall, overhead, indoor, outdoor and more patching applications. To patch the crack shown in this article, we used quikrete vinyl concrete patcher, a selfbonding cement mix made specifically for repairing broken, chipped or loose concrete and masonry, as well as filling medium to large cracks. Understanding the repair conditions and choosing the correct product for the job are essential for a longlasting repair. Tensile bond tests are increasing in popularity as a means of measuring this adhesive property, both on site for quality control and in the laboratory for materials evaluation.

Breakers are not ideal for preparation of contact surfaces and large pieces of concrete may be. Concrete pulloff testing is used to confirm the substrate strength prior to the installation of repair materials or as quality assurance for the installation of overlays or fiber wrap. Permanent concrete repairs are possible, well, nearly permanent. Priming of repair areas and placement of patching compound. Pull off test to evaluate the compressive strength of concrete. The technique generally consists of establishing entry and venting ports at close intervals along the cracks, sealing the crack on exposed surfaces, and injecting the. Extensive, detailed illustrations throughout the book guide users in the proper planning and execution of repairs. The successful application of a concrete repair system is often evaluated through pulloff testing.

An additional test method is required to determine the pulloff strength of the patch from the substrate concrete. C1583 c1583m standard test method for tensile strength of concrete. For such inplace quality control qc testing, the inherent risk of misalignment might affect. The quality of concrete repairs is determined by the adhesive strength between the repair material and the substrate. The proceq dy2 family of automated pulloff testers covers the complete range of pulloff applications with unmatched ease of operation and the. Single component, polymer modified fine silica provides smooth finish.

We have proven solutions for all type of concrete repairs, including wall and floor crack repair kits, roadway repair large area concrete repair products, parking lot repair etc. Concrete repair guide tips, tricks, and suggestions for common problems issues found in concrete construction and maintenance. Preparation of all surfaces to receive patching compound. How does our overhead concrete repair material outperform the rest. Concrete patch repair structural engineering general. Concrete repair and repair products the concrete network. Also basement repairs, foundation repairs, parking garage repairs, underground structures. Pulloff adhesion testing for concrete repairs request pdf. Adhesion of the new patch to the original concrete is generally considered to be an important criterion in judging the success of the repair.

Essentially, concrete repair details are standard, chip out the bad stuff, get behind the bars, patch, although agencies and individuals have their nuances, a trend ive seen lately on nysdot projects is to add mesh to vertical repairs. Planning of the maintenance programme aims to even out the expenditure profile as much as possible for obvious reasons of cash flow management. Product description concrete patch repair material for cracks, and holes in concrete. How to prepare your surface and apply vertical concrete mix. Patch repair of concrete ncs national concrete solutions. Concrete fixitall 25 lb fastsetting, nonshrinking gray. Concrete adhesion pulloff test the pulloff adhesion test determines the maximum perpendicular force that a surface area can bear before a temporarily stuck plug of material is detached. Maintenance of concrete structures for durability of rcc members modern concrete is a very durable construction material and, if properly proportioned and many concrete structures, however, were constructed using early concrete technology, and they have already provided well over 50 years of service under harsh conditions. The trick to a longlasting concrete repair lies in bonding the new material to the old material. This test method serves as a means for uniformly preparing and testing coated surfaces, and evaluating and reporting the results. To protect the concrete we generally plaster its surface or cover it with suitable materials as per our need. Concrete repair manual 14 txdot 012019 chapter 1 introduction section 2 using the concrete repair manual section 2 using the concrete repair manual when developing repair or rehabi litation plans, the engineer shoul d specifically include which sections of this manual will be enforced.

Tensile bond testing of concrete repairs springerlink. Repair has a shelf life of 12 months in a dry, unopened package. An evaluation of equipment and procedures for tensile bond testing of concrete repairs by alexander m. Astm c1583 c1583m, standard test method for tensile strength of concrete surfaces and the bond strength or tensile strength of concrete repair and overlay materials by direct tension pulloff method, astm international, west conshohocken, pa, 20. The technique generally consists of establishing entry and venting ports at close intervals along the cracks, sealing the crack on exposed surfaces, and injecting the epoxy under pressure. Spalls are categorized based on severity of damage per the definitions in this section. A concrete crack patch repair kit packed in a 5 gallon mixing bucket and includes epoxy resin, hardener, and aggregate for the strongest possible repairs for patch and resurfacing on concrete.

D2651 guide for preparation of metal surfaces for adhesive bonding. Joints wider than 1 may increase noise and slapping. The areas to be repaired are to be as shown on the drawings or as indicated by the clientconsultant. For thin repairs to small area with a chipped or damaged surface quikrete vinyl concrete patcher should be used. Pulloff testing is the most widely used test method to assess bond strength. Magazine of concrete research, volume 45, issue 164, 1 sep 1993 221229. Concrete repair guidelines concrete repairs can be broken down into four basic types, plus special repairs and planing. A conventional concrete mix to be used as a replacement concrete repair material shall be readymix concrete that meets all the specified salient features for repair material and conforms to astm c94. The results show that the pull off test results in high correlation r2 0.

Astm c1583 c1583m standard test method for tensile. Concrete epoxy patch kits floor ramp concrete patch. Such testing follows astm c 1583, standard test method for tensile strength of concrete surfaces and the bond strength or tensile strength of concrete repair. Quikrete concrete repair products are designed and formulated for specific repair applications. Step 4b stir concrete patching compound using a margin trowel or putty knife. Development of patch test to study behaviour of shallow concrete patch repairs authors. Factors such as location, repair material properties, serviceability and load capacity are just a few to be considered when assessing rehabilitation of concrete structures. Proceedings of the institution of civil engineers structures and buildings. Many people think that the new patching material will. Horizontal repairs thin resurfacer special patch hd 50 pave patch 3000 rapid resin repair sure patch concrete repair mortars 33. References direct tensile pulloff testing astm standard 1583 standard test method for tensile strength of concrete surfaces and the bond strength or tensile strength of concrete repair and overlay materials by direct tension pulloff method icri guideline 210. The key to achieving longlasting repairs is making sure the edges of the repair area are defined and it is cleaned properly prior to filling with repair material.

Best materials specializes in the finest quality concrete repair products. The bond test is used to conduct a pulloff test in accordance with astm c1583, test method for tensile strength of concrete surfaces and the bond strength or tensile strength of concrete repair. This product is a 2part coating that is mixed at a 1. Fully automated pulloff adhesion testers for concrete. Concrete is porous material porosity depends on mix design, so if not protected will start degrading over period of time. Quikrete concrete patching compound use for nonstructural, small aesthetic repairs to concrete. Fast patch concrete repair simply mix with water and trowel. In recent years, the pulloff test method has gained. Average of pulloff strengths of experimental repairs.

Strength of concrete repair and overlay materials by direct tension pulloff. The mode of failure and the pulloff strength provide valuable information about the appropriateness of. Although the sand patch test 14,25 and the profilometric method 44,65 are still popular for evaluating the surface morphology of concrete, tayeh et al. The pulloff test method is one of the tensile test methods commonly used to assess the adhesion between the repair overlay and the existing concrete substrate. Succinct coverage of topics in one and twopage modules provides excellent references for use in presentations. Pull off adhesion testers for concrete strength testing proceq. Concrete patch repair material for small and minor. As long as any remaining product is sealed well and is not all mixed together, it will last just as long.

According to the astm d4541 standard 9, the general pulloff test is performed by fixing, with an adhesive, a loading fixture disk to the surface of the coating. Learn how to repair concrete from demolition to caulking cracks. Bond characterization between concrete substrate and. Nov 14, 2010 steps for patching and repairing concrete. An evaluation of equipment and procedures for tensile. Breakers are not ideal for preparation of contact surfaces and large pieces of concrete may be sheared away, leaving insufficient texture. Natural concrete color perma patch fp f orm and pour 41. Evaluating the bond strength between concrete substrate and repair mortars with. Step 5b spread and texture the concrete patch to match the surrounding concrete. Bond characterization between concrete base and repairing sfrc. Apply it to concrete, mortar, brick, stone and mortarless stack and bond block applications. Its possible to expect a 20 30 year life expectancy from a properly executed repair.

Astm c1583 c1583m, standard test method for tensile strength of concrete surfaces and the bond strength or tensile strength of concrete repair and overlay materials by direct tension pull off method, astm international, west conshohocken, pa, 20. Failure will occur along the weakest plane within the system comprised of the loading fixture, glue, coating system, and substrate, and will be exposed. Repairs to delaminated and scaled areas of existing concrete. Standard test method for evaluating the adhesion pulloff. Although our concrete patch repair material has superior bonding agents, its strength is only as good as its application. Request pdf pulloff adhesion testing for concrete repairs where one. Provide all labor, equipment and materials necessary to complete the following concrete repair work. Field guide to concrete repair application procedures.

The test determines the greatest perpendicular force in tension that a surface area can bear before a plug of material is detached. Tough, weatherresistant vinyl reinforced repair material for concrete, brick and stone. The development and maintenance of a sound band is an essential requirement of a concrete patch repair. Epoxy injection method is used for cracks as narrow as 0. C1583c1583m test method for tensile strength of concrete surfaces and the bond strength or tensile strength of concrete repair and overlay materials by direct tension pulloff method e4 practices for force verification of testing machines. Note this test method is a destructive test and spot repairs are required. Patch repair of concrete ncs recognise that all repair requires an assessment of cause and the extent of damage or defect prior to action being taken. Astm d7234 19 standard test method for pulloff adhesion. Interstate products concrete patch epoxy repair kits are as easy as 1,2,3. Maintenance of concrete structures the constructor. The concrete should be structurally sound 200 psi or greater according to astm d7234, clean astm d4258, and dry less than 5%, astm e1907 or surface dry.

A weak or degraded concrete surface or concrete exhibiting signs of laitance either visible or. In a concrete patch repair, failures can occur at the substrate concrete, at the bond interface, at the overlay, at the epoxy used to bond the disk to the core, or as a combination of these failures modes. For cementbased materials mortar or concrete the pulloff. The steps of concrete repair include investigating the cause behind the defect in concrete, assessing the extent and severity of the damage, evaluating the need for repair work, selecting suitable repair technique and materials, reparation process preparation, application of the repair technique, and, finally, curing the repaired area.

This paper discusses the main issues relevant to tensile bond testing, namely material properties, surface. Concrete patch repair material for small and minor concrete. Ronacrete a guide to application of concrete repair. Repair, evaluation, maintenance, and rehabilitation research program. Founded in 1904 and headquartered in farmington hills, michigan, usa, the american concrete institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensusbased standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete.

Steps for concrete damage repair in reinforced concrete. Method statement for damaged cracked concrete repair of. Click the link below and get directions to your closest sherwinwilliams store. It is recommended that investigation into soundness of pavement be performed before a project and specific repairs are decided upon. C1583 test method for tensile strength of concrete surfaces and the bond strength or tensile strength of concrete repair and overlay materials by direct tension pulloff method d16 terminology for paint, related coatings, materials, and applications.

601 739 564 1372 284 21 599 223 262 1430 1351 528 555 871 1244 1078 50 591 1422 725 289 618 416 272 531 1432 1425 75 1490 1290 101 216 1453 1390 607 928 598 784 584 580 1193