CoatingsPro Magazine Supplements

Concrete Dec 2017

CoatingsPro offers an in-depth look at coatings based on case studies, successful business operation, new products, industry news, and the safe and profitable use of coatings and equipment.

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COATINGSPRO CONCRETE COVERED 2017 7 Elcometer Limited Edge Lane, Manchester M43 6BU. England +44 (0) 161 371 6000 +44 (0) 161 371 6010 - fax Measuring the Dry Film Thickness of Coatings on Concrete non-destructively Until recently there has only been one non-destructive option for measuring the dry film thickness ofcoatings on concrete and therefore the only means of verifying results was to perform the destructive test that was being avoided in the first place. Unfortunately this situation can lead to a confidence issue with the results being achieved unless samples of known thickness can be generated and then measured. Whilst this has always been possible it has not always been easy, until now. An ultrasonic coatings-on-concrete gauge together with an innovative Coating Calibration Mould (CCM) is now available so that the calibration of the coating material can be more easily determined non-destructively. e calibration of an ultrasonic thickness gauge is the process of providing enough information to the gauge to enable it to calculate the speed of sound in the material which is to be measured. e ultrasonic gauge determines the thickness of a coating by measuring the time of flight of a pulse of ultrasound energy and calculating the distance travelled using the speed of sound or velocity specific to the coating material. is generally involves being able to measure a sample of the applied coating and using the measured thickness of the sample to calculate the speed of sound. e problem of producing a sample of coating that can be mechanically measured without destroying an applied coating has been solved by the introduction of the CCM. e CCM is a metal mould into which a sample of the coating to be applied can be poured. Once the coating has cured, a non-destructive digital or mechanical coating thickness gauge can be used to measure the thickness of the sample reliably. is value can then be used to adjust the ultrasonic gauge allowing it to calculate the speed of sound in the coating. In this way the gauge will be calibrated for the material to be tested. e benefit of using a digital dry film thickness gauge in this calibration process is that the verification of the DFT gauge can be done using certified foils. Certified foils provide traceability for the verification of the DFT gauge across its range of operation and therefore the traceability is extended to the calibration of the ultrasonic coatings-on-concrete thickness gauge. Traceability is important in the calibration of a gauge, instilling confidence in the user and enabling them to report their findings to the client with increased certainty and an increased level of credibility. e Elcometer 500 Concrete Coating ickness Gauge along with the innovative Coating Calibration Mould, data management capabilities and increased measurement range has broadened the scope and increased the confidence in non-destructive measurement of coatings on concrete. For more information visit our website: Fig 1. Coating Calibration Mould Fig 2. Measuring the coating sample thickness in the CCM Company Profile: Elcometer Limited SPONSORED CONTENT

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