Paper Details
F. Papworth and Zheng, T. September, 2009. Perth, WA.
This paper outlines several advanced NDT techniques, i.e. impact echo, impulse response, ultrasonicpulse echo, ground penetrating radar, spectral analysis of surface waves, parallel seismic and crosshole sonic logging. This paper also illustrates what role advanced NDT can play in quality assurance of new structures and in structural condition assessment of existing concrete structures through authors’ projects.
R. Barnes & Papworth, F. 2007 Australasian Corrosion Association Annual Conference.
This paper aims to give an overview of Non-Destructive Test’s used in life assessment of concrete structures and how they have developed in recent years. Covermeters, Linear Polarisation Resistance, Corrosion monitoring, Resistivity and Half Potentials are all examined. The T0 + T1 life assessment technique is then summarised with the view to explain how these Non-Destructive Test’s can be helpful in monitoring how a marine structure is behaving relative to the predicted life. Each Non-Destructive Test is analysed with respect to its effectiveness in giving quantitative information regarding the life assessment of a structure.
Y. Zheng and Papworth, F. Building & Construction, Research & Consultancy (BCRC). Perth, WA.
Advanced Non-Destructive Test (NDT) methods such as radar, impact echo and fibrescope techniques can be used to test and enable safe drilling, coring and rectification of post tensioned structures. Approaches for these specific applications are introduced and discussed in this paper.
F. Papworth and Barnes, R. 2005.
Techniques developed over the last 20years such as Reinforcement Electrical Potentials, Impact Echo and Ground Penetrating Radar are becoming main stream investigation methods while methods such as Linear Polarisation Resistance, Concrete Resistivity, Torrent permeability and initial surface absorption tests (ISAT) are little used. This paper will describe the accuracy, simplicity, cost and applicability of each method to explain why this is so. Digital rebound hammer, Ultrasonic Pulse Velocity, Reinforcement Cover Meters, Reinforcement Electrical Potentials, and Ground Penetrating Radar have improved markedly with the development of digitalisation. New instruments will be described to show how these well known methods have improved due to digitisation. Additionally the limitations of various methods used for different applications will be explored including:
- Ground Penetrating Radar, Impact Echo, Reinforcement Cover Meters and Reinforcement
- Electrical Potentials when measuring prestressing duct and rebar location and integrity
- Internal defect identification using Impact Echo and Ultrasonic Pulse Velocity
- Strength measurement using Ultrasonic Pulse Velocity and Digital rebound hammer with and without correlation tests to the mix
- Concrete quality assessment using Ultrasonic Pulse Velocity, Torrent permeability and Sorptivity Tests
The overview presented will be useful to those not expert in testing to determine what method to employ in different circumstances. Whilst including some theory the paper will also explore some of the practicalities of employing different methods of NDT.
F. Papworth., Drowne, R.D. and Doyle, V.J. 1981. Journal of Petrolium Technology.
The planning and inspection procedures used on Total Oil Marine Ltd's MPC-01 (Manifold Compression Platform) minamize time spent offshore and ensure that the retrived infomation accuratly describes the structures condition. Procedures include preparing a detailed field specification; visual photographic, and nondestructive inspection techniques, and a report designed for easy access to detailed information.