Tests to determine the bond between the concrete substrate and the overlay: a) pull-off, b) shear, c) slant shear, d) splitting The first group of methods assumes testing under tension stress. The DY-2 is the new automated Pull off testing system that has replaced The equipment is simple to assemble and operate. However, there are a number of differences in the test … The pull-off adhesion strength and mode of failure of a coating from a concrete substrate are important performance properties. The direct tension pull-off test has gained popularity as a test method used in the laboratory and especially in the field to assess the quality of bond between externally bonded fiber-reinforced polymer (FRP) repair materials and concrete owing to its low cost and simple procedure. 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 and Overlay Materials by Direct Tension (Pull-off Method). The adhesive will be allowed to cure overnight. x 20 mm thick 58-C0215/3 Stainless steel test disc 50 mm dia. The direct tension pull-off test has gained popularity as a test method used in the laboratory and especially in the field to assess the quality of bond between externally bonded fiber-reinforced polymer (FRP) repair materials and concrete owing to its low cost and simple procedure. Applications for the Elcometer 106 Adhesion Test include paint or plasma spray on bridge decking, coatings on steel, aluminium, concrete etc. Pull-off strength of coatings from concrete is described in Test Method D7234. The load at failure as well as the location of the failure is recorded. First, a shallow core is drilled perpendicularly into the surface leaving the intact core still attached to the material at the area of interest. The adhesive will be allowed to cure overnight. The Testers are fully automated, with one-touch operation after programming and test disc preparation is complete. Upon completion of a pull-off test, the dolly and coated surface should be examined. The Proceq DY-2, with its integrated feedback controlled motor, provides a regulated load rate as specified by all standards, thereby providing a fully automated test for the most repeatable results. Application Pull out resistance test of anchor bolt, anchor cable, steel bar, expansion bolt, chemical anchor bolt, anchoring parts, also can test the glass curtain wall field pull out resistance, it’s necessary instrument in civil engineering testing area. The test determines the greatest perpendicular force (in tension) that a surface area can bear before a plug of material is detached. The pull-off adhesion strength and mode of failure of a coating from a concrete substrate are important performance properties. 1.1 This test method covers procedures for evaluating the pull-off adhesion strength of a coating on concrete. In order to test the pull-off strength of a coating on concrete, the technician would use The pull-off test as a means of projecting the compressive strength of concrete and other materials involves bonding a circular steel disk to the surface by means of an epoxy resin adhesive. This study adopted the recommendations of BS 1881: Part 207 [13]. The tensile load shall be applied perpendicular to the test area through the pull head plates using the pull off … The pull-off test method is one of the tensile test methods commonly used to assess the adhesion between the repair overlay and the existing concrete substrate. In this test method, the tensile stress between old and new test surface 58-C0215/12 Metal ring (dinking die), 50 mm int. For further details on the theory and requirements of pull-off testing please refer to the two most applicable international standards, ISO 4624 “Paints and Varnishes – Pull off-test for adhesion” and ASTM D 4541 “Standard Test Method for Pull-Off Strength of Coatings Using Portable Adhesion Testers”. It is suited for very high strength applications such as testing of fibre reinforced polymers (FRP) bonded to concrete structures. Pull out test • Shall be confirmed to BS 1881 Part 207 • Give direct tensile strength value by tensile fracture • The insert may be cast into the concrete or positioned in hardened concrete in an under-reamed groove from a drilled hole. 1.1 This test method covers a procedure for evaluating the pull-off strength (commonly referred to as adhesion) of a coating system from metal substrates. This precision instrument is lightweight for easy operation, even on walls and overhead. The force required to pull the stud from the surface, together with the carrier, is measured. Automated Pull-Off Adhesion Tester. DYNA Pull Off Tester The Dyna has now been discontinued, we can still offer service and support. Maximum pulling force of 16 kN (3597 lbf) Mid-range instrument suitable for most pull-off testing applications. When testing coating adhesion using a pull-off adhesion gauge; once a properly prepared dolly has been glued to the prepared coating, and the glue has fully cured, you are ready to perform the pull-off test. Elcometer 506 Pull Off Adhesion Tester can be used in accordance with : The Elcometer 506 Pull Off Concrete Adhesion Tester can be supplied as a kit or with individual 50mm accessory items (skirt, dolly, cutter) which can be added to existing Elcometer 506 gauges. DYNA Pull Off Tester The Dyna has now been discontinued, we can still offer service and support. The pull out assembly is pulled with a lump of concrete, which is subjected to tension and shear and the force required to pull out is related to shearing strength of concrete and The major components of a pull-off adhesion tester are a pressure source, a pressure gage and an actuator. Test discs and plate 58-C0215/4 Aluminium square plate 50 mm x 50 mm to EN 1348 58-C0215/5 Aluminium test disc 50 mm dia. Pull off testing is also used for exotic testing applications such as testing the integrity of laminated carbon brake disks; Benefits. The quality of concrete repairs is determined by the adhesive strength between the repair material and the substrate. The pull out assembly is pulled with a lump of concrete, which is subjected to tension and shear and the force required to pull out is related to shearing strength of concrete and The Concrete Pull-Off Test is used to determine the direct tensile strength of a concrete or the bond strength of concrete mixture. Concrete Adhesion Tester Pull Off - BAMR Concrete Adhesion Testers are essentially used to determine the bond strength between two layers. Manuals and technical information are still available below. Proceq DY-225 is an automated pull-off tester with a maximum pulling force of 25 kN (5620 lbf). The pullout test produces a well defined in the concrete and measure a static strength property of concrete. Adhesion of the new patch to the original concrete is generally considered to … Pull-off testing is the most widely used test method to assess bond strength. The pull-off adhesion test determines the maximum perpendicular force that a surface area can bear before a temporarily stuck plug of material is detached. The adhesion pull off test, also called the paint pull off test, is a process used to determine how well a coating performs and bonds to a particular substrate, such as concrete. Ask Document Center Inc. for more information. destructive pull-off method were employed to test the interlayer pull-off adhesion in concrete floor models. Scope This specification describes the method Proceq DY-216 is an automated pull-off tester with a maximum pulling force of 16 kN (3597 lbf). • Two FRCM fabrics were compared: carbon and PBO. The adhesion pull off test, also called the paint pull off test, is a process used to determine how well a coating performs and bonds to a particular substrate, such as concrete. The pull-off test, also called stud pull test in which an adhesive connection is made between a stud and the carrier (or object to be tested) by using a glue, possibly an epoxy or polyester resin, that is stronger than the bond that needs to be tested. Proceq DY-225 is an automated pull-off tester with a maximum pulling force of 25 kN (5620 lbf). The testing equipment consists of metal test circular plates, threaded rods, epoxy, a core drill, a load cell, a displacement transducer, and a hydraulic jack. Pull-off adhesion testing for concrete repairs Authors: D. J. Cleland , L. Basheer Source: Magazine of Concrete Research, Volume 59, Issue 10 , 1 Dec 2007 (771–776) The pull-off test is relatively simple to perform, gives reproducible results and does not require planning before placing the concrete. The pull head plates (or dollies) are then bonded centrally to the test areas with a suitable adhesive. This test is performed by gluing a loading fixture, which is known as a dolly or stub, to the coating with an epoxy . The concrete pull-off testing equipment consists of a metal test disc, epoxy, core drill, draw bolt, and jack. The quality of concrete repairs is determined by the adhesive strength between the repair material and the substrate. According to the ASTM D4541 standard (1995), the general pull-off test is performed by The Pull Off test was developed in England in the 70s, with the aim of determining the strength of concrete in situ, due to problems with concrete produced with high-alumina cement [5]. • Pull-off strength increased with an increase in substrate roughness and testing age. • The compressive strength can be considered as proportional to the ultimate pullout force. Pull-off and bond strength testing provides a popular method of testing both the adequacy of a coating’s adhesion, as well as its point of failure. Pull-off characterization was performed on FRCM/concrete bond. プルオフ式：付着力を数値で判定できるシンプルな方法です。平面と曲面の両方で試験でき、実験室や塗装現場で実施するのに最適です。ドリー（円筒形の引張端）を塗膜に接着剤で固着し、接着剤が乾いたらドリーを引っ張り、塗膜が剥がれるのに必要な力を測定します。 Using Limpet pull-off test for concrete strength prediction has now been accepted in standards of the UK, North America, Holland and some other countries. The DYNA Z is a pull off tester for measuring: concrete or shotcrete tensile strength Evaluate bond strength of coatings and cementitious material with pull-of testing. Carrasquillo Associates LinkedIn, Forensic Engineering Investigation & Analysis, Construction and Engineering Expert Witness, Structural Engineering & Consulting Services, Non-Destructive Testing, Evaluation & Services, Precast/Prestressed and Tilt-Up Construction, Soils, Foundations, and Retaining Structures. The DY-2 is the new automated Pull off testing system that has replaced the Dyna. II Test Methods for Continuous Fiber Sheets 5. Changes from the previous issue A redline edition is available for this document, with all changes visible. The pull-off test, also called stud pull test in which an adhesive connection is made between a stud and the carrier (or object to be tested) by using a glue, possibly an epoxy or polyester resin, that is stronger than the bond that needs to be tested., that is stronger than the bond that needs to be tested. Figure 1: Concrete Pull-Off Testing Equipment, Figure 2: Concrete Pull-Off Testing Schematic and Failure Planes, info@carrasquilloassociates.com Scope 1.1 This test method describes the apparatus and procedure for evaluating the pull-off strength of wet lay-up or pultruded (shop-fabricated) Fiber Reinforced Polymer (FRP) laminate systems adhesively bonded to a flat concrete substrate. Description. The pull-off strength is the result of this test based on the force used in pulling, the type of adhesive used with the dolly and the type of failure on the coating surface. The pull head plates (or dollies) are then bonded centrally to the test areas with a suitable adhesive. Failure can occur in any one of the following planes: (A) epoxy, (B) overlay (if applicable), (C) interface, or (D) substrate, as shown in Figure 2. The variability of pull-off test results is caused by both variations in the material under test and Once the epoxy cures, a bolt is attached to the metal test disc and the jack, shown in Figure 1, pulls the bolt/disc until failure occurs. This test is performed by gluing a loading fixture, which is known as a dolly or stub, to the coating with an epoxy. Pull out test for concrete 1. pull off的意思、解釋及翻譯：1. This is based on the correlation values with the compressive strength test. Concrete pull-off 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. x 20 mm thick 58-C0215/8 Aluminium test disc 20 mm dia. It has increased accuracy for low strength applications such as testing adhesive strength of mortars and renders. The pull-off strength is the result of this test based on the force used in pulling, the type of adhesive used with the dolly and the type of failure on the coating surface. dia, 25 mm high, for fresh plaster, to EN 1015-12. Next, a metal test disc of the same diameter as the core is epoxied/bonded to the surface of the attached core. THE PULL-OFF TEST FOR CONCRETE PATCH REPAIRS Repair to concrete structures often involves breaking out cracked concrete and replacing this and areas of spalling with a mortar or concrete. tension pull-off tester, Model 106, in accordance with AS1580.408.5 – 1994, Adhesion-Pull-Off Test and ASTM D4541-95, Standard Method for Pull-off Strength of Coatings using Portable Adhesion Testers. This test offers two test protocols. If a vehicle pulls off, it starts moving: 。了解更多。 把pull off添加到下面的一個詞彙表中，或者創建一個新詞彙表。 Concrete pull-off testing is used to measure the direct tensile strength of a material or bond strength of an interface. Automated Pull-off Adhesion Testers For Concrete Strength The quality of concrete repairs is determined by the adhesive strength between the repair material and the substrate. The pull-off adhesion test determines the maximum perpendicular force that a surface area can bear before a temporarily stuck plug of material is detached. The surface of the base layer in the latter had been prepared in four ways. Using this type of testing for quality assurance ensures that clients receive an adequate, well-constructed repair. Pull off test for concrete 1. The pull-off test method is one of the tensile test methods commonly used to assess the adhesion between the repair overlay and the existing concrete substrate. It is suited for very high strength applications such as testing of fibre reinforced polymers (FRP) bonded to concrete structures. WE can provide suitably trained technicians with externally calibrated test equipment to cover all Pull Off Testing requirements. The tensile pull-off method for adhesion testing, as outlined in ASTM D 4541 and similarly in BS EN ISO 4624, involves gluing a test dolly to the coated surface and then pulling the dolly by exerting a force perpendicular to the surface in an effort to remove the dolly with the coating from Test dollies attached Adhesion of the new patch to the original concrete is generally considered to be an important criterion in judging the success of the repair. Pull off Test 拉力測試 Tile 瓷磚拉力測試 Pull-off test of tiles in the force of range 1 kN to 16 kN In-house method TIL-P-001(saw-cutting method or coring method) Tile adhesive 瓷磚膠粘劑拉力測試 Pull-off test of tiles adhesive in the It is a mid-range instrument suitable for most pull-off testing applications. Reset or rewind the gauge or actuator head to its start position and attach the dolly. The test determines either the greatest perpendicular Drill bit with centering point to obtain 20 mm dia. Proceq DY-206 is an automated pull-off tester with a maximum pulling force of 6 kN (1349 lbf). The Proceq DY-2 family of automated pull-off testers covers the complete range of pull-off applications with unmatched ease of operation and the ability to store a complete record of the test. If you don't have a business partner account, please register here. Failure mode reporting – The DY-2 is unique in allowing the operator to record the location of the break during a test in the same record as the strength measurement. • The level of surface roughening and the specimen's testing age were included as other parameters. Pull-off testing is the most widely used test method to assess bond strength. Manuals and technical information are still available below. Construction systems parts, Force, Test specimens, Cement and concrete technology, Strength of materials, Pull-out tests, Concretes, Test equipment, Structures, Mechanical testing ICS 91.100.30 Title in French Essais pour In addition to pull-off force, many National and International standards such as ASTM D4541 and ISO 4624 require the nature of the fracture to be recorded. The concrete pull off test is feasible to estimate the strength of in-situ concrete. Protocol 1 (test to fracture) determines the greatest perpendicular force (in tension) that a surface area can bear 1.1 This test method covers a procedure for evaluating the pull-off strength (commonly referred to as adhesion) of a coating on rigid substrates such as metal, concrete or wood. If a vehicle pulls off, it starts moving: 2. 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