Proceq Webinar: Pull-off testing according to standards with Proceq DY-2

Hi there. I might wish to welcomeeverybody to this webinar on pull-off checking out in accordance tostandards with Proceq DY-2. So, let’s appear on the agendafor this webinar. We’re going to begin withpull-off testing fundamentals. Then we will go into theapplications, including a live demo. Then conclude off through sayingsomething concerning the calibration of the instrumentand then we are going to have the conclusion and the Q&A session. Earlier than we , i’d simply liketo introduce myself. My title is Dave Corbett. I’mthe product supervisor for the Proceq DY-2 instrument and someother concrete instruments. And my colleague is Patrick Dorner.He’s going to introduce himself. Hey everyone. I am PatrickDorner and i also need to welcome you to this webinar.So let’s move on to pull-off scan basics. The approach isactually a quite simple. Clearly, you start usingtypically a drill bit or a coring tool and you reduce agroove into the substrate to match the scale of the testdisc. Within the instance which we’re going to preserve coming backto throughout this webinar, the EN1542, for instance, itrecommends roughly 15mm into the substrate.Then youfix the disc to the skin utilizing an proper adhesive. Typically this may also be an epoxy-founded adhesive. Then weconnect the pull-off checking out instrument and we practice aperpendicular drive unless the disc is pulled-off from the surfaceand we report the highest drive required to tug off thedisc. How you calculate the bondstrength can also be very straight forward. The bondstrengthis usually measured in MPa or psi. It can be certainly the failureload or the pull-off drive which can be in newtons,kilonewtons or kilos any empirical process dividedby the pass sectional area of the test disc. So, it is verystraight ahead. And the important thing parameters of thetest are listed right here. To start with, you may have theunits. So, the items where the forces are applied and mentioned.The scale of the experiment disc. And this will vary according tothe type of fabric you are checking out and the application.And we will see this later on.And the cost at which the loadis utilized, that is very fundamental. It’s the mostsignificant element for reaching repeatable outcome. The totaltime of test, together with the load fee, this gives youan thought in regards to the expected pull-off force. And the failuretype, it is very most important when the failure takes position thatwe have got to examine and document where the breakactually took place. The fine example or theeasiest example for this, you’ll discover here, this is anextract from ASTM C 1583, and you’ll discover the common locations where the breaks can take situation. So, it can be in thesubstrate right here, the bond between the coating and thesubstrate, in the coating itself, or, in the worst case, thebreak will take place right here between the test disc and thecoating. Clearly, you can must repair the test here,it means your glue hasn’t set adequately or you’ve usedan incorrect variety of glue. We definitely permit failure moderecording with out instrument. And sincerely now we have threeuser-outlined phases. We just call them right here A, A/Band B.This is honestly for the user himself to outline,but one instance would be right here. Where A would mean a failurein the coating layer. A/B would imply a failure betweenthe coating and the substrate. And B would mean a failure inthe substrate itself. You will see precisely how thisis achieved in a while when Patrick performs the live demonstration. Did you wanna say anything,Patrick? Sure, I need to add that herewe have precisely for the are living demo these three levels, A for thedecoration concrete as a coating layer, A/B as the bond and Bwhat is more or less the substrate, what will be if the concretebreaks..K. Add-ons for thisinstrument are in actual fact the scan discs, the majoraccessories. They usually come in packs of 10 like this.You will find there are all styles and sizes and we’ll seea little bit afterward the place this precise typesare used. With a purpose to accommodate thevarious sizes of scan discs, we have different combinationsof the feet with the Proceq DY-2 scan. You’ll find for the smallertest disc, now we have the regular tripod configuration. Forlarger discs, we can transfer the two-legged configurationor this adapter plate which is constant to the backside of theinstrument to accommodate the most important test discs.That you could seehere, this is what the adapter plate appears like and the way it’sfixed to the backside. Moreover to this, when youare working on a vertical floor or overhead, you at all times have thepossibility that when the experiment is completed, that the instrumentwill crumple. And now we have a fixing accessoryfor this. It is in actual fact a strap with a carabiner and it can be fixedonto the bottom of the instrument in one of the vital screwholes furnished. So, this acts as, basicallyjust to hinder the instrument from falling to the ground inthe case of an overhead scan. So, watching on the most important featuresof the Proceq DY-2 at a look, in actual fact it is a absolutely automatedpull-off scan, we’ll see within the live demonstration, it is veryeasy to setup. And whenever you , it performsthe complete test mechanically.Every single experiment parameterthat you need, in line with the standards, which you could report.We provide software, which additionally files the load expense.And, as one can find, it is rather small and compact,so it can be used on walls and overhead. It is an integratedinstrument. And we’ve a complete rangeof accessories. I wish to add on this,because of this photo we can see in the live demo,you are able to do the settings on the desk, then that you may repair it overhead and then that you could startthe experiment, so there’s no have got to do the settings overhead. Okay. So, moving on toapplications and requirements. You see right here, this is actuallya choice of the various, many, requisites that there arefor pull-off testing.There are most often morestandards for this than any other concrete NDT experiment. Theseare one of the most most important ones. And you’ll be able to see the parameters,the key parameters are normally generally the same.The experiment disc measurement is invariably designated, the weight expense isalways exact with a exact tolerance. And in some circumstances,the total time of test is there. We are going to be looking with moredetail into EN 1542, it’s one of the vital most important standardsused in Europe for repair materials. There may be a similarstandard in the united states, the ASTM C 1583 additionally for restore materials.Andyou have all the requirements like, for illustration, the ASTM D 7522for fiber strengthened polymers. So this is one example, severalexamples of the types of purposes of this instrument.I might additionally like to claim something about checking out onasphalt considering the fact that it can be a request we get sometimes. InEuropean standards, there’s no general for this particulartest. In Switzerland here we do have a regular for it,it’s called SIA 218-three. And it virtually recommendsusing frequently 45mm rectangular disc or a 50mm round disc, but thenwith a speedy load price, so 300 newtons per 2nd. In the us,one of the most DOTs, I believe Kansas and Louisiana i know forcertain, they have got their possess standards for asphalt testing,and AASHTO additionally.They usually by and large take this 6inch core after which do the pull-off checking out, three samplesusing a 50mm or 2 inch disc on this, and that i think Patrickwould like to assert something about the test in Switzerland. Sure, i’ve a piece workforce inSwitzerland out of which there are 20 engineers, theydo quite a few tests, they do exams on the identical subject withsquare test discs and with circular, and their experienceshows that the square test discs supply higher results. Why? Theysay their experience indicates that with the rotation and thevibration of the core drill you’ll carry a bit of the bondand impact the bond. So, that’s the experience andit’s why they are utilising extra square test discs on asphaltthan the circular ones. Okay. And, so, test discselection. Truly it is outlined through the ordinary. This is ourportfolio of experiment discs, so you will see the quite a lot of ones, thetype of material they’re product of.Some of the requisites specifyaluminum or metal. Some of them do not. And hereyou can see a list of central standards the place that you can applythe quite a lot of test discs. This intention list is honestly on ouroperating guidelines. As far as items are involved,we really have three one-of-a-kind units. The onlydifferentiation is on the, maximum force they canapply. So we have now 6 kilo newtons, sixteen kilonewtons and 25kilonewtons units. This table here gives you anidea of the working range and, of course, the maximum loadvaries on the scale of the experiment disc. With a common 15mmdisc, you’ll discover for instance the Proceq DY-206 works within the range0.3 to three.1. We’re mainly asked about whathappens in the range beneath. That is centered on 10% of themaximum load. The instrument is actuallycalibrated from 5% onwards in a manufacturing facility. But of course, itactually begins measuring as soon as any drive is utilized.So which you can certainly use the instrument at reduce stringsthan this, but you may not get this accuracy, the tolerancesthat we warranty from the calibration. However obviously theinstrument can be used under the ten%.We will lookinto one illustration in element, EN 1504-three, to explain a littlemore about this. This is a commonplace actuallydefining the way you carry out repairs on concrete structuresand it’s commonly utilized in Europe. And we’re regularly requested thequestion: why we don’t list this as one of the crucial requisites in ouroperating instructions? On account that many people caught thiswhen they are speakme about testing repairs. The motive wedon’t include this is for the reason that it is no longer truly a pull-offtesting normal.Inside this standard, itactually refers to EN 1542 for checking out the adhesive bond.And that is without a doubt the general that we caught in our operatinginstructions and with which we thoroughly comply. As you willsee, clearly it offers you the sort of characteristicsthat you require. So, the adhesive bond testedaccording to EN 1542, should have these strengthrequirements in step with the class which you expect toachieve.The type of substrate is alsodefined however that is truly defined in an extra ordinary,the EN 1766, but you’ll discover from watching at these bondstrengths that certainly on this case the Proceq DY-206, would besufficient for accomplishing this experiment. We’ve a maximumstrength here of 3.1, so will have to be greater than sufficientfor this. So, now we’re actually gonnamove on to performing a test with a live demo, so i’m going to handover to my colleague. Ok. Earlier than we begin with thelive demo, I want to have a seem on what we haveto do within the place of work as a training, that we have now thecorrect instruments with us, the proper instruments, and theaccessories.Let’s have a appear. To start with,we wish to check what general can we need to comply with, that weknow what disc dimension, scan disc size, we wish to have, whichunit we have got to set on the instrument and which load cost. Secondly, I wish to make surethat i have sufficient battery with me so I verify, k, do i want tohave extra assessments on website online, in particular once I drive somewhereto the construction web page two hours, I wish to ensure Ihave adequate battery with me considering the fact that one full battery loadwill hold 80 exams. For the preparation, which toolsdo i need? Like drilling computer:A coredrillfor round discs, a round noticed for once I havesquare discs.Additionally, now we have noticeable before withthe average, on the whole the normal is 50mm indiameter, but if i’ve one with 20mm, of course I needanother core drill. Then, i’m going to need an adhesive,an epoxy adhesive, and this must be bigger within the bond strengththan the results I assume on scan. Grinding paper is a plus,a hand brush is a plus. And if possible, you could alsobring an industrial vacuum cleaner. Why can we must checkthis earlier than? As we have obvious earlier than, with thestandards, if i would must follow the european standardEN 1348, I would wish a round saw, due to the fact of the50x50 square test discs.Like right here, as we’ve got seen, inSwitzerland some engineers are making use of a circular noticed given that ofthe square disc for Bitumen, OPA layer and also some customersuse Polystyrene rectangular discs. Then you need to use a knife,and that is the only scan disc you could repair with the epoxy,attach it first after which you could possibly cut. Let’s have a look on the average EN 1542. Here we speak about the roundtest disc and that is why we additionally ought to seem whether or not we havethe correct core drill with us? An predominant informationon the core drill is that the interior diameter of the coredrill must be equal or larger than the outer diameter, soI can ensure i’ve the core drilled in a tolerance likeit’s mentioned from the regular plus minusone millimiter, so i am allowed to have 49mm up to51mm.Right here on the proper facet you cansee one image of a drilling computing device with an instrumentguiding the core drill. This can be valuable if youwant to check the 15mm into the substrate. Let’s have a look on an illustration.Why is it so primary to have the proper interior diameter on thecore drill? Here you can find 50mm anddiameter will give you a effect of 3.06 newtons per squaremillimeter. But if you have best 47mm, youwill have a outcome of 3.46 newtons per rectangular millimeter.What can be a difference of 13%. And you’re going to be out oftolerance once we talk about plus minus 1mm, so 49mm would beokay, forty seven would not be.So, let’s go to the reside demowith this example on the normal EN 1542. To begin with, we would coredrill the partial core, and what we’ve got heard beforefor this usual, we will have to drill 50mm into the substrate. And for those who see the images,the upper one, is not excellent to do due to the fact you haveno guiding, so that’s why we don’t do it like this one.What we have now completed is, we did adry drilling with this guiding plate of wooden but, if possible,do it in a wet drill considering that then you’re going to have an effect on less the bond when you consider that of the abrasion. Then, we go on with grinding thesurface of the test object and also of the experiment disc. We can easy the surface withthe hand brush or, like I stated before, an industryvacuum cleaner is a plus. Fixing the scan disc, we use theepoxy adhesive, usually is ready difficult in round 20 minutes.There are some adhesives, epoxy adhesives, with a view to befaster but additionally some slower.Predominant to understand is, I willshow within the are living demo, that you simply flip it a bit of,that you just ensure there aren’t any air bubbles in between thesurfaces. Ok, so just a word about theadhesives that we use. Proceq don’t sincerely supplyadhesives, sincerely they are available in the community, international.The kind of adhesive that you simply use can differ loads with theapplication, so mainly they are on hand in the localmarket. Right here you can find some typicaladhesives, on the left aspect, these are extra typicallyavailable, devcon and araldite, epoxy adhesives. Something likethis could have a bond strength of about 10 to 13 MPa, so it’smore enough for the style of scan we’re doing, we’reexpecting somewhat less than, good around about 2 MPa.Thistype of adhesivetakes a very long time to set, so typicallywe would need to prepare the experiment web page the day earlier than andthen return and perform the test or prepare it early inthe morning and carry out the scan within the evening. Thereare additionally industrial adhesives like this one. Using a powderand a solution. This sets in about 5 minutesand this variety of adhesive is without a doubt utilized by really loads ofour patrons right here in Switzerland on account that you cancarry on with the experiment very speedily. Before we start, i want toexplain anything about the interface. That is the userinterface on the Proceq DY-2. Very simple to make use of. We havean icon for surroundings the measuring unit, for environment the scan discsize, and for surroundings the weight cost.Also you canset a highest drive. Navigating around this menuis also quite simple. We’ve these navigation keyswith an finish to put in. Main is that this secondfunction key, this has some unique services, for example,environment the area of a square test disc. It’s also usedfor surroundings a maximum drive if you wish to have the scan to aparticular force but do not need to proceed to drag-offthe disc. It will also be used for settingan end of experiment standards. Probably we conclude the testwhen the colossal load drops by means of 20%. Now we have had it in thepast, mainly when trying out on elastic substratesand elastic coatings that the scan disc hasn’t pulledcompletely clear. The maximum stroke of ourinstrument is 5mm and we can clearly set this end of testcriteria to 0% after which the instrument will pull the full5mm, so this must make sure a concrete spoil.K, so let’s the livedemo over here. What I want to exhibit you firstis, as we have now acknowledged before, we have this decorationconcrete:what’s in gray color is the design A. Then we havethe bond A/B. And we have this substratein a concrete wreck, mainly utilized in a backyard forwalking areas. Okay. Let’s start. So, first,as we’ve got seen before, I grind the outside to ensure the entire looseparts are long past. I also grind, for higher fixing ofthe adhesive, the scan disc. I clean it up withthe hand brush. After which I begin to repair theadhesive. And that i want to make sure thatI have enough adhesive on the experiment discs, so that Ican repair it on the skin, certainly when it can be a dryconcrete, and it can be scorching. That everything is cleaned up. I repair it, I provide a little ofpressure on it after which I turn it a bit to ensure that Ihave no air bubbles in between. What can happen right here is, ofcourse we possess a table, it must be smooth but youcan see, i can still slide it, so oftentimes you needsome space holders.When that is constant, we will gofurther on to the settings of the instrument, and as I havesaid, here might be our test disc for the test andI don’t repair it right now. First, now we have seen on theEuropean normal EN 1542 that we need to use MPa. So Ikey in right here and say return. Then, like right here, we now have thissecond perform button for the test disc measurement. I do know thatI have keyed in given that of the earlier test with thesquare 40×40, we nonetheless have the 1,600 rectangular millimeter. Theinstrument doesn’t make any change between square andround, you simply key in the proper rectangular millimeter. Going again with the secondfunction button, and then I key in 50. K. And say return. So, subsequent we now have seen on theEuropean standard that we need to have a load cost of zero.05, so Ijust key in zero.05.What else am i able to do right here withthe second operate button like they said? Which you could set herethe MPa, the maximum load. Right here on this I anticipate a resultsomewhere between zero.Eight MPa to 1.5. So, here i can reduceit or i will carry it to the max. I’ve one other choice with thesecond perform button, that I simply key within the eighty%. Themoment you may have 20% reducing from the maximumload, the engine will stop and the test is finished. So, going back, we’ve carried out oursettings, i’m going to play, as you will find it can be still noton the scan disc. I press one time the playbutton after which one can find the settings, whatwe did, and the weight expense is from the ordinary norm zero.05MPa per second, the test disc measurement is diameter50mm, what results into 1,963 square millimeters.I will be able to press an additional timethe button, nothing happens. And now I carry my instrumentto the scan disc board. I fix it manually. Then there isn’t a extra space inbetween the bolt and the instrument bolt, and the momentI have a steady number over here, like right here, zero.09MPa, now i can press return, it is the third time Ipress return and play and begin the scan. As we will see on the screen,the reside chart and our knowledge from the ecu ordinary isthat the test should be less than ninety seconds, here onthe line beneath, you have got the time and on the left aspect you havethe load.So, after approximately 18seconds we got the failure. So, our effect is 1.05MPa, i will be able to raise it. Deliver it here, so that you just cansee this surface due to the fact this was once the outside of experiment.And here you’ll discover the failure happened on thecoating layer, what’s the ornament concrete. So thiswould be a one hundred% failure on the coating layer, not onthe bond and no longer on the substrate. With this information, I pressreturn over right here, i go to the left, right here you can find A.So Ijust key in a hundred% failure on the coating layer, 0% ofcourse on the bond layer. And 0% on the substrate. Going again to this symbol ofdisc, after which I save my file. The second i’ve saved my fileI can take the knowledge and have a seem to categorise mytest effect. Once we see right here, from theEuropean general EN 1542, you’ll discover right here, this lowframed MPa tiers and we had 1.Four, 1.04 MPaas a outcome, so we’d classify it as class R2.This Ican fix and this is kind of one experiment. Okay. This graph that we sawhere, that is virtually the live view, which is in the program,you’ll handiest see this when you’re doing the scan, if youactually connect the instrument to the laptop whilst you are doingthe scan. However this expertise is actuallysaved with the scan all of the time, and that is what it lookslike whilst you down load it onto the computer. So that you actuallysee the load cost curve, you see the factor of the breakand all of the information, so one hundred% failure mode right here. He’llgive some feedback about what you may have defined theseparticular stages as, for example. You’ll be able to additionally see the effectiveload expense, it is not always gonna be the same load as whatyou programmed, it depends on how elastic the substrate is, butthen you see, you get a complete record of the scan. And so, now we’re definitely gonnamove on to calibration of the instrument. We calibrateaccording to EN ISO 7500-1-C, which is an alternativemethod for automatic calibration tactics.And weactually calibrate to classification 1 from 20% to a hundred% of the maximumload. Type 1, basically if you’re speakme about an accuracyof plus minus 1%, to my expertise no pull-offtesting necessities simply name for this accuracy, most of themcall, if it is mentioned in any respect, call for an accuracy of plusminus 2%, which simply could be category 2. However, say wecalibrate anyway to class 1. That is truely what ourcalibration certificate looks like. So, you see, the weight steps from 20% up to a hundred% and you see, the accuracy is inside 1% onall cases. A variety of devices basicallydo the accuracy just on the whole load, so, should you received a 16kilonewton instrument, for example, it could be 2% of 16kilonewtons. However, this commonplace, EN ISO 7500-1,requires the accuracy on the actual measured load. Some standardsrequire it. Whilst you got to ship thisinstrument for calibration, and this is whatever that’sonly executed via external laboratories, shoppers wouldn’tnormally do that thing. But you have this variety ofset-up, you need some form of a reference load cell. It wouldtypically be a traceable reference load cellphone, you needan indicating device to record the forces generatedby the weight phone.And then you definitely need a pc runningthe DY links program to file the forces generated by way of theProceq instrument. The link software is actuallydelivered with the instrument, but that you can additionally download itfree of cost from the Proceq website. It’s under thedownloads part and you’ll to find the application right here. And this isactually what the menu looks like, you could have calibrationverification, calibration adjustment, you can restoration previouscalibrations and we even have an excel template for recordingthe outcome. A normal calibration procedurewould be to verify the present calibration, so you don’t adjustthe instrument at all. You check the calibration as itis. If it can be inside the desired tolerance, you could discontinue, youdon’t must do whatever extra.If it is out of tolerance, youhave to move ahead and participate in a calibration adjustment. And thenfollowing that, it will be ordinary to do a calibrationverification again. The application we providemakes it very handy to do that. That is what the interfacelooks like, so you will have a suite-up at the prime forrecording the ability who carried out the experiment. Serialnumber of the reference load mobile, etc. Very main is totest the sound, for the reason that what this software does, it offers anaudible indication of whilst you will have to record the strengthmeasurement from the reference load cell.The strengthmeasurements from the Proceq DY instrument they’re recorded automaticallyby the program. And we do two complete runs,from 10% to one hundred% after which we enter this understanding inthe calibration certificates template. So, here that you would be able to seesome figures recorded from the reference load phone. And hereyou can see the figures recorded from the Proceq DY instrument. And theexcel template essentially has a calibration certificateworksheet, which does all of the calculations as definedin EN ISO 7500-1.So, essentially, we might belooking for less than 1% from 20% up to one hundred%. And if youare working with a ordinary that best requires a class 2machine, so an accuracy of plus minus 2%, you couldactually permit more errors on this case, if youwished, but that is without a doubt for the user to make a decision. Wecalibrate the category 1. If it can be out of tolerance, we dothe calibration adjustment process. The interface isexactly the identical.But this time we do 20 stepsand from 5%, we do two entire runs, this is what itlooks like right here, so the interface is the same. However this time wehave two whole steps. Once now we have recorded all of thisinformation, we simply press on this button, calibrate Proceq DY-2, andit will do the adjustment for you. And the entire processtakes about 10 minutes to do this adjustment. Following that, you are going to goahead and do a verification again, to be definite. And, last, not on thecalibration, as I mentioned it’s no longer whatever a person would normallydo, it’s almost always laboratories, if you want any moredetailed information on this, you can get in contact with Proceqdirectly, we have now extra precise information. Now we have prepared avideo which sincerely goes through the whole system, soyou can certainly see it being accomplished.So, on a case to casebasis, that you could get in touch with us for those who requirethis information. So, we’re watching at theconclusion now. The Proceq DY-2, as we have now noticeable, itmakes it very convenient to do a test in keeping with the requirements,that’s what the instrument was designed for. All the feedbackwe’ve had would say we have now executed this. It is a fullyautomated test, and also you get a complete file of the scan.So far as accuracy is worried, we exceed the specifications ofthe pull-off trying out requirements, and we calibrate in accordance toEN ISO 7500-1 and the calibration program is included with theinstrument.And furthermore, we’ve got acomplete set of discs and components. And the final word goes tomy colleague. Thank you, Dave. Okay, forcontact to Proceq, above all with regard to this webinar, youcan write an e mail to webinar at proceq.Com when you’ve got some furtherquestions on that, for extra small print, or you could also, we arean international webinar, so if you want some contact fromthe Proceq website online, that you could contact our partners or contactProceq straight on our subsidiaries for more are living demo,product introduction or if you are already on LinkedIn,facebook, or Youtube and Twitter you can additionally follow us on oursocial media networks. So, you can get some morenews and knowledge. Ok. I think now, then, we canmove on to the Q&A session.So, i do know the primary questionalready came in, asking in regards to the adhesives. I will just go rapidly back tothis slide. We had a question about thisindustrial adhesive, what it is without a doubt known as. Andthis certain adhesive is referred to as HBM X60. And it is usedby plenty of our buyers here in Switzerland. But I’msure there are other varieties of adhesive identical. Typicalset-in time, within about 5 minutes. Ok. There may be a query here,that we do not calibrate beneath 20%. If an end user has afailure beneath this quantity, what percent error are you able to anticipate? As you will have visible, we actuallycalibrate from 5% onwards. We assurance this 1% tolerancefrom 20% as much as 100%. Most devices actuallyachieve this already from 5% onwards, however often it canalso be an error round about 2% beneath this 20% worth. K. There is yet another questionhere, it says, when testing fiber bolstered repairmaterials, is there any solution to seize the publish height behaviorof the fabric utilising the DY-link program? The answer tothat is yes. And this is without a doubt, we did not have this a lot withfiber reinforced polymers but we had the hindrance with elasticmaterials right here in Europe that repeatedly, you do not get a cleanbreak, however surely, as you can see,we record the entire load price graph, so, mostly if youdon’t get a smooth destroy right here, you’ll be able to get it started curve-offand that you could additionally see another endeavor afterwards.And if weset this finish of experiment criteria to zero%, it’ll continue pullinguntil we’ve got the full 5mm stroke, so, you are going to recordthis knowledge. There’s another question. Isthere a endorsed procedure to wash the disc after the test? Some of my patrons, theyjust warmth it up. After which they easy it with aknife considering the fact that the epoxy will get elastic. Or some othercustomers use it to convey it right into a fridge after which they justknock with a hammer on it and it’s going to be free, so you canclean it up. After that, when you’re in thelaboratory, you should utilize a grinding computer after which it’scleaned up and you don’t must do the grinding on-siteagain. There’s a query right here alsoabout trying out force of historic concrete and the way deep you shoulddrill. If you are speakme about doinga tensile force scan, I mean, there are actuallysome requirements for this, i know the British standard1881 has a test for tensile strength.When you are drillinginto ancient concrete, I imply, the main factor isactually, i might say, to avert the restore layer,so i’d virtually recommendation, I mean, either use a rebarlocator to determine the depth of any rebar, or, ideally, tomark the mount and then do your test to prevent therebar. I have got to add some thing, like,you may have noticeable the concrete spoil earlier than. It’s manufactured from twolayers, so it can be a round 50mm in measurement. However there are twolayers, and we did drill the 15mm and then it acquired damaged, so, it’salso your experience that you just see on-site is everythingsmooth, which you can follow the typical, okay, yes or no. There is a question here. Do youuse a normal block for exams? Normally we do not drill holesbut rate more a concrete instantly on the substrate andwe scan the bond force between the 2. Once more, it’sa question of whichever regular you’re working to, you realize,repeatedly people do testing on plastic, for illustration, withoutactually doing coring.However you then in reality have tobe careful concerning the measurement of the brick. So, you’d haveto, for calculating the discipline. However a usual test block,the block is always defined with the aid of the typical you are working to.If you are not certain, i’d go together with the 50mm experiment disc. Devcon. Anyone’s requested aboutthe devcon epoxy. Devcon turton, that is actuallya brand name, it can be a kind of epoxy that’s used fairly a lotin the USA. There is one other question.Which normal is utilized in the usa to verify the loading speedof the experiment? We have now proven you at thebeginning, with the ASTM standards. Ok. To my advantage, I imply,one of the crucial widely used, but this is for repair inoverlay substances, is ASTM C 1583. And right here youcan see the defined load expense by means of this usual. However there areothers, I mean, if you’re utilizing this one, for fiber enforcedpolymers, it has without a doubt one-of-a-kind load charges, and many others. -The 80%.-k. Any person requested additionally a query.Can we repeat the that means of the maximum applied load? What this is, is while you, ourinstrument for example can participate in a pull-off testup to 8.1 MPa.It could be that I want to doa scan, I might just need to show that the bond is just right for, forexample, 2 MPa, but then i do not want to do a harmful testand pull it away. So I virtually set a maximum loadof 2 MPa, the instrument will ramp up to 2 MPa after which itwill stop and it will wind go into reverse. So, it will not actuallycontinue except a smash happens, so i will be able to genuinely define a maximumload. This is not the end of testcriteria. -No, it’s the highest.-Yeah. You want to avoid wasting to your checks.What we have mentioned is that the engine load distance is 5mm,the working stroke is 5mm on the engine, and if you havesomething just like the rockwool right here, and it’s not particularly a goodbreak, like on concrete, on concrete it is a flat failureand then it is completed. In case you have this and also you havestill some drive in opposition to, then it can be now not completed.So, when youhave the highest load fee and you recognize when that you can expectthe results, like from 1.5 to 3.5 newton per squaremillimeter, and the maximum load expense is1, you just can key in four.Zero newton per squaremillimeter. So that you may shop time seeing that the full stroke won’tgo 5mm. Anybody’s requested about namingthe experiment on the instrument. I are not able to take into account now, whathappens after we do store, if we will enter a name. You’ll find… In most cases, what i’ve obvious ontest website, you do a image and you then rename the file.Sincerely, the documents are givena date stamp, so, a time stamp. That is when it’s downloaded onthe instrument, however we cannot enter a name for the scan onthe instrument. -So, this one?-ok. There may be a query about themaximum thickness of the overlay. I do not know if this isspecified, I mean, often to test the, if it’s too thick,i guess it might probably turn out to be particularly elastic, in which case, you mayhave some disorders, but I don’t know specificallyof a maximum restrict on the overlay.Anybody is asking if we canshow the download from the instrument to the computer. Sure, we are able to exhibit this. This is absolutely the DY-Linksoftware interface here. To download to the pc, yousimply click on this button here, you see, it comes up, downloadall measurement data from the Proceq DY-2. And that’s it. And this isactually the experiment we just carried out. It has the improper datebecause now we have the flawed setting there, but this is the1.04 MPa.Here you can find the load fee graph and the settingsthat had been carried out via Patrick. And likewise the fault recording. Anybody’s requested about howmany layers we are able to put in for the fault mode recording.If we are able to put in more than 3. The answer is no. I do know thereare multi-layer techniques, for instance, the fiber reinforcedpolymer ordinary in ASTM 5722, this simply additionally definesmultilayer method recording. But there is a limit to how muchwe can show on one of these small display, so we certainly restrained it to 3 phases. Almost always, when you report ondefault, I imply, which you could also take a photograph of the pattern, oreven take the test disc again to the administrative center, but the restrict isactually three in our process. There’s a different query. NowI’m mixing German and English. How thick must be the testplate? One German typical Its citing a minimum of 25mm. Yeah, I imply, like I mentioned,most likely these matters are all going by way of the instructions.I imply,our experiment plate here, that is about 5cm thick, however the testplates will also be distinctive sizes and, as invariably, you shouldcheck the directions. Any individual’s requested if there arestandards for checking out bond strength of present day concreteor non-concrete, some straits present codings. There arestandards, I imply, in most cases, the more requisites that we knoware clearly for checking out on concrete on account that that’s actuallywhat the instrument was once defined for, designed for.Thereare additionally necessities for illustration for testing, pull-off testingpaints and varnishes on metal substrates. So, generallyspeaking, there are a lot of, many, many standards out there. There’s yet another question. From the experience, does thecoring influence the high-quality of the scan? Does the specimenget broken in a percentage? In a percent, i am no longer toosure, however what you will have to make sure you have visible theinstrument before guiding the instrument for the core drill,the easier your instrument is, the extra it’s fixed onthe concrete, the simpler the core drill might be.If youpush it too hard, and you’ve got plenty of abrasion, of courseyou will influence the bond. If I restore a concrete roadwith 15cm thick of latest concrete, can i still use this gadget tocheck the bond between the two layers of concrete? So, we’retalking a few 15cm thick coating. I do not knowof experience of any person doing a test like that. I imply, it’snot rather a coating and it can be absolutely a concrete repair. Anybody’s requested if they can dothe calibration of the instrument in India. Yes, that you can. I imply,the software is on hand. It can be with the instrument.Basically, you just have to in finding any institute there whichactually has a calibrated reference load server, andthen you can do the calibration anywhere you love.You do not ought to send it backto Singapore. There’s a further query. Canthe instrument be used for non-concrete substrates? Sure.We have some consumers who test the bond between the mortarand the condominium insulation external. And this is rockwool. They testit, they usually simply want to make sure that the bond in betweenthese two layers is greater than the substrate.I imply, the sort of, in actual fact,you can use it to test the bond on whatever within the workingrange, it doesn’t have got to be a concrete substrate, you justhave to know the expected failure load, and if that’swithin the range of the instrument, it should be viable to dothe experiment. You’ll see also usually,the asphalt practically the railways on the streets.Itwill also do this scan on bond strength because of theabrasion. And anybody’s genuinely askedabout obstacles of temperature. Quite almost always that is mentionedin the typical EN ISO 1542, basically, you should not do the test below5 degrees if I keep in mind competently. May additionally temperaturehave any result on the adhesive? That is also whatever you haveto soak up consideration. So, as soon as again, you shouldrefer to the specifications you test into. Okay. I feel we’ve got answeredall of the questions. If not, you continue to have some time totype some in. There may be been quite a lot of questions. -ok.-ok. K then. We would wish to saygoodbye and we are going to see you in the subsequent Proceq webinar. Thanks for your attentionand have a fine day. Thanks..

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