Leling Concretetest Hammer Factory
Leling Concretetest Hammer Factory

Leling Concretetest Hammer Factory

Leling Concretetest Hammer Factory
Leling Concretetest Hammer Factory

Leling Concretetest Hammer Factory

Leling Concretetest Hammer Factory
Leling Concretetest Hammer Factory

Leling Concretetest Hammer Factory

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ZC3-A Concrete Rebound Tester

WONDERFUL VIDEO

Daily maintenance of rebound tester

Zhonghui Technology

Use method of rebound tester verification device

NEWS CENTER

2019
12-28
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How to use the rebound tester

How to use the rebound tester
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2019
12-28
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Routine maintenance

Rebound method for testing compressive strength of concrete
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2019
12-18
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ZC3-A Concrete Rebound Tester

productdescription:ThisinstrumentisaconcretereboundmeterthatfullycomplieswiththeindustrystandardJGJ/T23-2011"TechnicalRegulationsforTestingtheCompressiveStrengthofConcretebyReboundMethod".Itisusedtodetectthecompressivestrengthofradonintherangeof10-60Mpa.ThenominalenergyofthereboundmeterItis2.207J,andtheindicationsystemisapointerdirect-readingmediumreboundtester.ThetechnicalparametersoftheinstrumentareinaccordancewiththevarioustechnicalspecificationsoftheNationalMetrologicalVerificationRegulationofthePeople'sRepublicofChina"ConcreteReboundTester"(JJG817-2011).TechnicalParameters:●Handlength:20.0±0.2(mm)●Handfriction:0.65±0.15(N)●Sphericalradiusoftheendofthebouncerod:25±1.0(mm)●Rigidityofbouncetensionspring:785.0±30.0(N/m)●Unhookpositionofthebouncehammer:atthescaleline"100"●Workinglengthofbouncetensionspring:61.5.0±0.3(mm)●Theimpactlengthofthehammer:75±0.3●Bouncingpositionofbouncehammer:"0"onthescale●Fixedvalueofsteelanvil:80±2       Performancecharacteristics:Theconcretereboundtesterusesaspringtodrivethehammerandtherestorationforceoftheinstantaneouselasticdeformationgeneratedbyhittingtheconcretesurfacebythehammer,sothatthehammerwilldrivethepointertoreboundandindicatetherebounddistance.Thereboundvalue(theratiooftherebounddistancetothedistancefromthehammertothehammerbeforeimpact,calculatedasapercentage)isusedasoneoftheindicatorsrelatedtothecompressivestrengthofconcretetoestimatethecompressivestrengthofconcrete.Itisaninstrumentfornon-destructivetestingofthecompressivestrengthofconcreteinstructuresorcomponents.Thisinstrumentislight,flexible,inexpensive,doesnotrequirepower,thebuttonisnoteasytofallusingthestretchingprocess,thepointeriseasytoadjustthefriction,anditiseasytograsp.Itisverysuitableforon-siteconstructionsites,plusthecorrespondingreboundgaugeverificationproceduresandreboundmethod.Theformulationandimplementationoftechnicalregulationsfortestingthecompressivestrengthofconcretehaveensureditsdetectionaccuracy,andhavebeenwidelyusedinChina'sconstructionindustry.
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2019
12-18
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Use of rebound tester

1.Holdtheimpactrodagainsttheconcretesurface,andpresstheinstrumentlightlytoreleasethebutton.Whenthepressureisrelaxed,theimpactrodextends,andthehookishungwiththeimpacthammer.2.Maketheinstrumentaxisalwaysperpendiculartotheconcretesurfaceandapplypressureslowlyandevenly.Afterthehammerhitstheimpactbar,thereboundofthehammerwillmovethepointerbacktoacertainposition.Thescoreshowsacertainvalueonthescaleasthereboundvalue. 3.Keeptheinstrumentmovementagainsttheconcretesurfacereadingandrecordthereboundvalue.Iftheconditionsarenotconducivetoreading,pressthebuttontolockthemovementandmovetheinstrumenttotakethereading. 4.Graduallydepressurizetheinstrumentsothattheejectionrodprotrudesfromtheinstrumentuntilthenextuse. MaintenanceofthereboundtesterRoutinemaintenanceshouldbeperformedwhenthereboundtesterhasoneofthefollowingconditions:1.Bouncingmorethan2,000times;2.Whenindoubtaboutthetestvalue;3.Thesteelanvilrateisnotqualified; Routinemaintenancemethodsshouldmeetthefollowingrequirements:1.Unhookthehammer,thenremovethemovement,thenremovethehammer(removethebufferpressurespringinside)andthethreepieces(thehammer,thespringtensionspringandthespringspringseat); 2.Usegasolinetocleanallpartsofthemovement,especiallytheinnerguideandimpactsurfaceofthecenterguiderod,hammerandhammer.Aftercleaning,applyathinlayerofwatchoilorsewingmachineoiltothecenterguidebar,andotherpartsmustnotbeoiled;3.Washtheinnerwallofthecabinet,removethescale,andcheckthatthefrictionofthepointershouldbebetween0.5-0.8N; 4.Donotrotatethezeroingscrewthatispositionedandfastenedonthetailcover;5.Don'tmakeorreplacepartsbyyourself;6.Aftermaintenance,thecalibrationtestshouldbeperformedaccordingtorequirements,andthecalibrationvalueshouldbe80±2.VerificationofthereboundtesterThereboundtestershallbesenttothelegaldepartmentforverificationwhenoneofthefollowingconditionsexists.Aqualifiedreboundtestershallhaveaverificationcertificate:1.Beforethenewreboundtesterisactivated;2.Exceedthevalidityperiodoftheverification(validityperiodishalfayear); 3.Cumulativenumberofbouncesexceeds6,000; 4.Thesteelanvilrateisnotqualifiedafterroutinemaintenance; 5.Sufferingfromsevereimpactorotherdamage.
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2019
12-18
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Rebound method for testing concrete strength

Theinstrument,principleandmethodofreboundconcretefortestingconcretestrength,aswellasthefactorsaffectingthestrengthoftesting,areintroduced,andthemostextensive,simple,andaccuratemethodfordeterminingconcretestrengthisprovidedfornondestructivetesting.Keywords:carbonizationdepth;reboundvalue;compressivestrength;concrete  Therearemanydetectionmethodsforon-sitetestingofconcretestrength,suchascoredrillingmethod,pull-outmethod,indentationmethod,shootingmethod,reboundmethod,ultrasonicmethod,reboundultrasoniccomprehensivemethod,ultrasonicattenuationcomprehensivemethod,raymethodfallingballmethod,etc.Thereboundmethodandultrasonicreboundmethodarethemostwidelyusednon-destructivetestingmethods.Therelationshipcurveestablishedbetweenthecompressivestrengthofconcretetestblocksandtheparametersofnondestructivetesting(ultrasonicsoundvelocityvalue,reboundvalue,pull-outforce,etc.)iscalledthestrengthcurve,whichisthebasisforestimatingtheconcretestrengthofnondestructivetesting.Thestrengthcurveisdividedintothreetypes:unifiedstrengthcurve,regionalstrengthcurveandspecial(calibrated)strengthcurveaccordingtothesourceofthematerial.Themethodofdetectingthecompressivestrengthofordinaryconcretestructuralmembersbyusingareboundinstrument(adirect-actinghammertypeinstrument)isreferredtoasthereboundmethod.Thefollowingfocusesonthereboundmethodfortestingconcretestrength.1Detectionprincipleandcharacteristics1.1Principle  Becausethereisacorrelationbetweenthecompressivestrengthofconcreteanditssurfacehardness,thereboundhammerofthereboundmeterishitbyacertainelasticforceontheconcretesurface,anditsreboundheight(reboundvaluereadbythereboundmeter)Itisproportionaltothehardnessoftheconcretesurface.Therefore,thereboundvalueAccordingtothesurfacehardnessofconcrete,thecompressivestrengthofconcretecanbeestimatedbasedonthesurfacehardness.1.2Features  Thereboundmethodisusedtotestthecompressivestrengthofconcrete.Althoughthedetectionaccuracyisnothigh,theequipmentissimple,easytooperate,quicktotest,andlowintestingcost,anddoesnotdamagethenormaluseofconcrete.Therearemanyfactorsthataffecttheaccuracyofthereboundmethod,suchasoperatingmethods,instrumentperformance,andclimaticconditions.Forthisreason,youmustmasterthecorrectoperationmethod,payattentiontothemaintenanceandcalibrationofthereboundmeter.  "TechnicalSpecificationsforTestingtheCompressiveStrengthofConcretebytheReboundMethod"(JGJ/T23-2001)stipulatesthattheageoftheconcretemeasuredbythereboundmethodis7dto1000d,whichisnotapplicabletothesurfaceandinternalqualitywithobviousdifferencesorinternalexistenceThedetectionofdefectiveconcretecomponentsandconcretemadebyspecialmoldingprocessesgreatlylimitsthedetectionrangeofthereboundmethod.Inaddition,duetothelargestrengthbaseofhigh-strengthconcrete,eveniftherelativeerrorisonly15%,Itsabsoluteerrorwillalsobeverylargeandmakethetestresultmeaningless.
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Add:Laoling City, Shandong Province

Tel:0086-534-6892666
        0086-534-6892777
Fax:0086-534-6892898
Zip Code:253600

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Name: Leling Concretetest Hammer Factory
Deposit Bank: Laoling Branch of China Construction Bank
Account:37001846201050002449

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