PROCEQ GPR LIVE 3

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BCRC's consultants have been involved in the use and development of Non Destructive Testing (NDT) for over 30 years. Frank Papworth commenced his involvement with NDT in 1978 when he managed one of the UK government sponsored programmes in 'Concrete in the Oceans' to assess the performance of marine structures. It included some of the first assessments of NDT's for corrosion measurements including electrical potentials, linear polarisations and resistivity measurements on concrete. Other research projects included these tests and NDT for quality of concrete including Ultrasonic Pulse Velocity (UPV) and Gamma Ray Backscatter. Since 2002 BCRC’s Frank Papworth has focused on seeking out the world best practice in NDT of reinforced concrete structures and, through his company PCTE. this has led to the introduction of many new techniques in Australia.

Non-Destructive Testing (NDT)
BCRC have been at the forefront of introducing new NDT methods to Australia for over 30 years. In the early 80's Frank Papworth bought to Australia the corrosion assessment techniques he had helped research and develop in the UK. These included electrical potential measurements, concrete resistivity measurement. In the mid-80's he was able to bring to Australia the first electrical potential wheel, an instrument he masterminded in the UK for rapid scanning of the corrosion risk. Over the last 10 years he has introduced a broad range of methods including Olsons instruments geotechnical methods, the MIRA 48 transmitter receiver UPE 'body scanner' for concrete.

BCRC today have a wide range of NDT methods at their disposal. Ultrasonic Pulse Echo (UPE), Impact Echo (IE), Impulse Response (IR), Cross Hole Sonic Logging (CHSL) and Ground Penetrating Radar (GPR) are advanced Non-Destructive Test (NDT) methods for evaluation of concrete structures. In each case, stress waves or electromagnetic waves are introduced into the concrete and reflected waves or structure responses are measured. These methods have seen rapid development and acceptance in many countries in Europe, North America and Singapore. All are now used in Australia but not commonly. Use has sometimes been stimulated by legislation requiring assessment of structures at regular intervals. Other advanced techniques such as Spectral Analysis of Surface Waves (SASW) and Interferometric Radar are having less impact in Australia because they have specific application where the market has yet to appreciate the benefits. Added to these there are a wide range of commonly used NDT's in Australia such as Rebound Hammer, UPV, Humidity Probes, Temperature and Maturity, Electrical Potentials, Polarisation Resistance and Pulsed Eddy Current Covermeter. For the last 5 years there is a new focus on development of monitoring systems. Strain and displacement gauges have been used for many years but today emphasis is on corrosion monitoring and systems that can be used for remote monitoring.