User Manual

Pull-Off LDV

Version 1.0

Copyright © 2015 DRC Srl

Table of Contents

1. About us ............................................................................................................................................... 32. Tools ..................................................................................................................................................... 43. Support ................................................................................................................................................. 54. Registration .......................................................................................................................................... 65. Order ..................................................................................................................................................... 76. Pull-Off - LDV series ............................................................................................................................. 8 6.1 General Safety .............................................................................................................................................................. 9 6.2 Purpose and limits of the method ......................................................................................................................... 10 6.3 Basic information about the tool ............................................................................................................................ 11 6.4 Running the test ........................................................................................................................................................ 157. Standards ........................................................................................................................................... 248. Pull-Off KIT and Accessories ............................................................................................................ 259. Technical Data ................................................................................................................................... 2810. Exploded view drawing ................................................................................................................... 3211. Video ................................................................................................................................................. 3512. Download documents ...................................................................................................................... 36

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1. About us

About us

DRC Srl designs, manufactures and markets equipment for non-destructive testing and investigations in the field of civil engineering since 1978.DRC Srl is diveded into three different divisions:

NDT Products Training Fatique testing Machine

to get more info, visit www.drcitalia.it/en

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2. Tools

Tools

DRC Srl has created a new version of the Pull-Off system, an innovative product due to the inclusion of new and updated components that make it more versatile and flexible.The system performs:

o STANDARD ADHESION test - PULL-OFF: standard UNI EN 1542:2000o SHEAR FORCE test - CNR-DT 200/2004 Instructions for the design, execution and control of static consolidation work employing reinforced composites and fibre

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3. Support

Support

For any trouble or assistance of DRC equipment, contact DRC Srl assistance service writing at assistenza@drcitalia.itFill in RMA Form for any assistance or maintenance of Pull-off and enclose it with the equipment when send it back for repair or maintenance. Send the document first byemail and then enclose the document with equipment.

When you contact the DRC srl for maintenance issue, please use a follows data to identify the unit.

Pull-off type Serial Number Calibration date

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4. Registration

Registration

DRC Srl innovates and updates continually their hardware and software products.It's DRC commitment to provide a continuos and long-term support to its customer and user.

In order to receive information and updates, please register your instrument through the registration area.Receive technical communications and updates regarding exclusively the product purchased and registered.

For information and clarification on this service, feel free to contact our staff at info@drcitalia.it

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5. Order

Order

DRC Srl offers its own range of products directly to the end user in order to maintain and ensure reliable and sure pre and post sales support.To request a quote please fill out the request Form for further information or visit the tool page

The LDV version Pull-Off tool is available in the following configurations:

o Pull-Off - Standard LDV serieso Pull-Off - LDV-T serieso PO-LDV-ST Shear support

for further information visit the page of Accessories

Tools manufactured and marketed by DRC Srl can also be purchased through the network of local dealers. Service and support are equally guaranteed by DRC Srl offices.

DRC Srl has a network of collaborators and authorised distributors for the foreign market.

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6. Pull-Off - LDV series

Pull-Off - LDV series

DRC Srl would like to thank you for choosing the Pull-Off - LDV series system.

The Pull-Off LDV tool produced by DRC is a lightweight and versatile piece of equipment that can be used in the following application fields:measurement of the strength of "adhesion" of a material on its support; measurement of adhesion strength of plaster, plastics, bitumens, composite materials, metals andsimilarly measurement of the strength of small plugs on concrete supports. (for this last application it is necessary to assess the effective intended adhesion forces);measurement of surface resistance of concrete or other materials: adhesion strength is measured directly in the material to be tested.

This user manual is intended to help you get the most out of using the LDV series of DRC Pull-Off systems and earlier versions.To take full advantage of your tool, please read carefully all the instructions given in this user manual.

This manual is available in the following versions:

o Manual in .pdf formato Manual in .html format (web help)

The manual is available in the support section _ Pull-Off download area

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6.1 General Safety

General Safety

To prevent the risk of damaging the equipment or provoking damages to the operator or third parties, carefully read the following general safety standards prior to using theconcrete test hammer. These standards should always be provided with the instrument, so that it may be consulted at any time by the user/operator. The manufacturer willnot assume any responsibility for direct or indirect damages to persons, objects or domestic and non-domestic animals, due to the non-compliance of the safety standardscontained in the present documentation.

The instrument must be used by adequately trained personnel, in order to avoid the improper use of the equipment.

The instrument must be solely used for its destined use for which it was designed

The tampering and modification of the instrument is to be considered as negligent and isolates the manufacturer from any responsibility deriving from the misuse. In such asituation the guarantee for eventual spare parts or calibration verification will immediately cease to exist

Do not perform or carry out any type of test with the instrument on any body part of person/s or animal/s: permanent damage and even grievous bodily harm may be causedby the use of the instrument on certain parts of the human/animal body

Anyone not familiar with the equipment or aware of the warnings given in this manual must not use the LDV Pull-Off. The tool must be used under the supervision of anexperienced person.

Keep the equipment clean. Lubricate the moving parts, especially the extraction rod M16x1

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6.2 Purpose and limits of the method

Purpose and limits of the method

The LDV Pull-Off System and earlier versions is used for the measurement of adhesion force between the coating material and its under support.Measurements can be performed on plaster, exterior coatings and/or fibre-reinforced and composite materials.The tool displays and directly acquires the adhesion strength.

Following the test procedures specified in the reference rulesallows you to obtain correct, accurate and acceptable measurements.

Incorrect positioning of the test plates may interfere with the success of the test.

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6.3 Basic information about the tool

Basic information about the tool

The LDV series Pull-Off tool is made entirely in Italy selecting the best materials, components, and accessories in the market. The tool consists of the following detaileditems:

o EDFX measurement readero SUB D9 measurement reader connectoro M12 measurement reader connectoro Feet - contrast supporto D50 Adhesion plate6. Quick connection ball coupling7. Support handle8. Pre-clamping rotation pin collar9. Traction handle10. M16 traction pin

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LDV Pull-Off Base extensions

11 Support foot extension 12 Contrast plate extension

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LDV Pull-Off with shear test support

13 Spherical anchor plate for shear test14 Couplers for contrast support feet15 Locking handle for contrast support feet16 Wall fixing bolt17 Lower contrast plate18 Lower plate adjustment knob19 Angled supports for plate adjustment

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20 M8 TCEI screw for fixing ball plate to L200 tractionplate

21 L200 fibre anchor plate

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6.4 Running the test

Running the test

Carefully read the instructions before carrying out the adhesion test with the LDV Pull-Off tool.Read the reference standards carefully. Follow closely and correctly the instructions and procedures indicated in the reference standards.

The “Adhesion test” consists of measuring the force required to “tear” a certain portion of material away from its underlying support. This operation is made possible byinitially pasting the test plate (which is round for standard tests and rectangular for shear tests) onto the material to be tested by using an adhesive that guarantees that theplate remains sealed to the support.

The LDV Pull-Off tool, complete with accessories allows you to perform two types of tests:

o a. an adhesion test by using the circular D50 test plateo b. shear test on composite materials

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Standard adhesion test

a. Preparation of test surface:Locate the area where the test is to be done, taking into account that you need perform at least 3-5 tests and calculate the average, in order to obtain a value that isrepresentative of the area.

b. Paste the plate onto the test material making sure that there are no gaps between the test plate and the underlying material. Apply the adhesive or glue evenly and waitlong enough so that the grip and hardening have occurred.During the winter, you need to leave it for a longer period to set. If the glue used is unable to achieve a grip quickly, use external removable supports to keep the test plateadhering to the underlying surface (for tests on vertical surfaces).

c. When the hardening has been achieved, using a circular diaphragm spring D 50 mm, insulate the circular plate from the surrounding material.The cutting/insulation operation must be performed carefully to avoid overheating the material and the underlying support. Heat may damage the adhesive.

f. Connect the EDFX display system to the load cell using the cable supplied together with the tool.g. Place the instrument on the test surface by inserting the ball coupling onto the extraction rod connected to the test plate.

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h. After fitting the coupling to the ball pin, turn the pre-load collar so that you generate a sufficient contrast power not to move the Pull-Off support from its anchoring position.i. Enter the rotation handle inside the seat on the pre-load collar.

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l. Turn on the EDFX force reader, perform a reset, select the desired unit of measure and set the peak reading mode.

m. Turn the traction crank until the test plate is torn away. The maximum force value will be displayed on the EDFX unit (with the cable available, you can connect the loadcell to the DaTa 500 C multifunction system).

n. Record the value in a form noting all the test surrounding conditions (temperature, type of surface,

o. Repeat the test at least 3-5 times for each test station and calculate an average to obtain a final value.

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Standard test - extensions

The LDV Pull-off tool is equipped with mechanical extensions that allow you to perform adhesion tests on covering materials that are larger than standard ones (e.g. tiles).

The test is performed in the same way as the standard test. The pictures below show what the tool looks like with the extensions inserted.

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Shear test

Shear tests are performed on a strip of composite material, subjecting it to traction force in its longitudinal direction. The aim is to provide a distribution of tangential stressesat the interface between the substrate and the reinforcement.As indicated in the CNR document, the test is particularly effective in determining the quality of adhesion.

a. Paste the test plate onto the material to be tested using resins with high performance. The plate must be bonded according to the procedures for laying the underlyingmaterial. The plate may be bonded at the same as the material to be tested is laid or at a later time after selecting the test area.

b. Place the lower contrast plate onto the support using a wall anchor bolt or a resin bar; position the plate with the adjustment knobs so that it is perpendicular to the anchorplate.

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c. Attach the small plate with the ball coupling into the Traction plate using the screws supplied with the tool.

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d. Insert the full LDV Pull-Off support into the housings on the lower contrast plate. Tighten the support feet using the knobs on the supports.e. Using the pre-load collar, exert a pre-load on the material that is sufficient to keep all the support in the test positionf. Insert the traction handle into its seat in the pre-load collar. After connecting the EDFX reader to the cell using the cable supplied with the tool, proceed with the test byturning the crank handle until the plate and material are detached from the underlying support.

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7. Standards

Standards

The LDV series Pull-Off tools comply with the following international standards:

o ISO 4624o BS 1881 part 207o DIN 1048 part 2o ASTM D4541-85o ACI 503-30o EN 1015-12o EN 1348

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8. Pull-Off KIT and Accessories

Pull-Off KIT and Accessories

The LDV series Pull-OFF tool is available in the following configurations:

LDV-S series Pull-Off

o LDV Pull-Off system complete with load cell and displayo Hard transport caseo User manualo Calibration report of load cello Calibration report of Pull-off

** load cells available in 25 and 50 kN versions

Accessories included in tool KIT

o Extensionso No. 5 Traction Plate D50 S20

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LDV - T series Pull-Off

o LDV Pull-Off system complete with load cell and displayo Hard transport caseo User manualo Calibration report of load cello Calibration report of Pull-off

** load cells available in 25 and 50 kN versions

Accessories included in tool KIT

o Extensionso Shear test bracketo No. 5 Traction Plate D50 S20o No. 1 Traction Plate L 200 S 50

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PO-LDV-ST

o Shear test bracketo No. 1 Traction Plate L 200 S 50

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9. Technical Data

Technical Data

LDV series Pull-Off tool is equipped with load cell and display for the measurement of adhesion strength. The measuring range of the force depends on the model:

o LDV - 25 : Measurement range: 0 to 25 kNo Linearity of measurement +/- 0.05%o Hysteresis +/- 0.05%

o LDV - 50 : Measurement range: 0 to 50 kNo Linearity of measurement +/- 0.05%o Hysteresis +/- 0.05%o Accuracy class ISO 376

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Specific dimensions

H = 65 mmH1 = 180 mm

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A = 127 mmB = 312 mmC = 143 mm D = 52 mm

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D1 = 165 mm

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10. Exploded view drawing

Exploded view drawing

The LDV series Pull-Off tool components are displayed below with their codes and order numbers.

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List of componentsPos Code Description Pos Code Description 1 Pre-load collar 16 Spherical traction collet

2 M16x1 traction rod 17 M8x55 TCEI screws to lock cell

3 Upper coupling 18 Main plate

4 Lower coupling 19 Sealing handle

5 Upper protection body 20 M5x16 screws

6 Load cell 21 Traction lever

7 EDFX reader support 22 Foldable traction handle

8 EDFX digital reader 23 M4x20 TCEI screws for support blocks

9 M4x10 TCEI screws for EDFX support 24 Anchor cup for fibre support

10 Extension lock 25 Locking knob for cup

11 Support extension 26 Main plate for shear support

12 M6x12 TCEI screws for fixing extension 27 M8 adjustment handle

13 Tear plate D50 x 20 28 Traction plate L200 x 50 ** (available L 150)

14 Ball pin for coupling and traction 29 Support and adjustment blocks

15 Feet - contrast support 30 M8 anchor bolt

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11. Video

Video

Pull-Off Standard Adhesion Test

Pull-Off - Shear Test

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12. Download documents

Download documents

On the product download page, the following documents are available

Manual Software and Applications Brochure

o Manual in .pdf format o Brochure

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