Concrete & Infrastructure Session
18 August, Thursday - Kedah Room - 10:45am - 12:30pm

Chair : Warren Green, Vinsi Partners​

An Introduction to Corrosion & Cathodic Protection of Reinforced Concrete Structures

18 August, Thursday - Kedah Room - 10:50am - 11:20am

Bio of Speaker


Full Name :  Calvin R. Pynn
​​Title / Position:  Founder & Senior Specialist
Company name :  AEGIS Technical Systems LLC, Dubai, UAE

Calvin graduated from the Electrical Engineering Technology Program of Ryerson Polytechnical Institute in Toronto Canada in 1977.
He has been a NACE member for 38 years and is a NACE certified ‘Senior Corrosion Technologist’ & ‘Cathodic Protection Specialist’ – and has also been an Instructor in the NACE Cathodic Protection education program for last 12 years.
He has specialized in the application of electrochemical corrosion control systems since 1976 and has worked extensively in the Oil & Gas, Chemical Process, Water Treatment and Civil Engineering industries in Canada and the Middle East.
Calvin held various technical and managerial positions while working for Corrosion Service Co. Ltd for the 1st 24 years of his career – and has been based in Dubai since 1992, where he founded Aegis Technical Systems LLC, focusing principally on extending the durability of reinforced concrete, industrial & marine structures in the Arabian Gulf region.  
An introduction to the fundamentals of corrosion & cathodic protection of reinforced concrete structures.  It walks the reader through the science of corrosion, the principles of corrosion prevention techniques and an overview of cathodic protection including practical methods of application & performance evaluation. 
This paper provides is a useful reference for engineers involved with the application of cathodic protection to reinforced concrete for the first time.

Life Cycle Provisions for Infrastructure Development in the Klang Valley
What is Appropriate?

18 August, Thursday - Kedah Room - 11:25am - 11:55am

Bio of Speaker


Name:  Kribanandan Gurusamy Naidu
Title / Position:  Managing Director
Company:  JTK Consult Sdn Bhd
​​The Author has over thirty years’ experience in consultancy and currently MD at JTK Consult a leading Consultancy practice involved in a range of engineering services including, Structural Design, Condition Audits, Check Consultancy, Risk in construction, Adaptive reuse of Heritage Buildings, Forensic Engineering and Dispute Resolution.  Prior to his current position he was Director of Taywood Engineering in Malaysia & Singapore spanning a 9 year period, where he was at the forefront of the use of innovative technologies in construction and the development of a specialist consultancy service. He has been at the forefront of developing independent forensic investigation approaches to identifying defects in existing structures in concrete, steel and timber.  His innovative and state of the art remedial solutions has provided a basis for cost effective structural renewal on a significant number of structures in Malaysia and in the region. He is a member of the institution of Civil Engineers (MICE) UK and a member of the institution of Engineers Malaysia (MIEM).  He represented Malaysia in the ISO Committee on Design Life of Buildings and was the chair of the local expert panel on Design Life between 2000 and 2005.  He was the founding president of the American Concrete Institute KL chapter. He has published over 40 papers in Conferences and International Journals and is the Author of over 250 Technical Reports. His experience extends to projects in the UK, the Middle East, Singapore, Southern Africa, Indonesia, HK and Australia. 
In recent years concrete specifications for infrastructure developments in the Klang Valley have increasingly included the provisions for achieving life cycle objectives which are rather onerous. The key elements for the life cycle provisions include appropriate design (e.g. concrete quality, cover, detailing etc) and the basic materials and concrete mix design to withstand the external exposure conditions to achieve a minimum 120 year design life. In the concrete specifications used in the Light Rail Transit extension projects currently underway there are often prescriptive requirements to achieve the design life and these include the need for a minimum Grade 55 concrete with w/c ratio of < 0.35 and prescribed triple blend concrete mixes and a cover provision of >30mm. Included also are the provisions for performance targets associated with the Rapid Chloride Permeability Test (RCPT) and Initial Surface Absorption Test (ISAT). As Kuala Lumpur and it’s surrounding suburbs are an urban environment well over 50 km from the sea, the exposure conditions can be classified as moderate to mild and the primary mechanism of deterioration of the concrete structures will be related to carbonation. In the paper a clear argument is made, using design life calculations, to show that the inclusion of inappropriate compliance testing such as RCPT in an urban setting away from marine aerosol exposure is inappropriate. This clearly reduces the possibility of achieving life cycle targets appropriate for the local environment due to the conflicting requirements for carbonation and chloride exposure protection. The need for updating these performance provisions are considered and a more rational approach is suggested.   ​

Webb Dock East Rehabilitation – A Case Study Analysis of a ‘Mega’ Wharf Repair Project in Melbourne, Australia

18 August, Thursday - Kedah Room - 12:00pm - 12:30pm

Bio of Speaker


Name: Nicholas Critchley
Title / Position:  Business Development Manager - Remedial
Company:  Freyssinet Australia
Nicholas Critchley has over 15 years’ experience in the infrastructure asset maintenance, rehabilitation & protection industry. Specializing in concrete and steel structure inspection and investigation, design strategies for refurbishment and protection, bid and project management and business development and strategy.
During his career Nicholas has worked in a variety of fields and positions throughout Australia and China. Following his graduation (Bachelor of Civil Engineering, RMIT, Melbourne, 1999) Nicholas worked his first professional 13 years with Savcor Group companies.  Initially employed as a Project Engineer in Melbourne, Nicholas has since fulfilled Project, Operations, State and Business Development Management roles Melbourne, Brisbane and Guangzhou, China.
For the past 2 years Nicholas has worked as a National Business Development Manager for Freyssinet Australia, based in Melbourne. Freyssinet are the largest specialist remedial contractor in Australia employing over 500 personnel.  Nicholas works as a part of the companies National Remedial Team which was formed in 2014 to support growth in the company’s Remedial Division. The National Remedial Team provides Australia, New Zealand and South East Asia, Business Development and Technical support in the field of Repairs.
This paper will review the complete project life cycle of the ‘mega’ Webb Dock East Rehabilitation project in Melbourne, Victoria. From structure investigations, design and documentation through to the methods and practices implemented during the construction phase. All facets will be critically reviewed and discussed in terms of the durability outcomes achieved.

Incorporating a variety of corrosion issues across a number of key wharf elements the treatments developed and delivered were both innovative and implemented at high quality standards. 

Due to the large scale and short duration of the project, previously suitable methods and practices were often refined to increase productivity, shorten time frames while simultaneously meeting or exceeding the standard of the work required.

A particular focus will be made on challenging technical aspects, as well as the preferred methods that were adopted to achieve requirements. These requirements will also be discussed in the context of applicable warranties, maintenance and achieving the desired design life.

The high pressure mix of project factors described above created a very challenging operating environment. Engineering creativity was needed to ensure that the many interests of the project were not only balanced but exceptional outcomes achieved.