Cracking the Concrete Codes (AS 3600 & AS 5100)


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There are a number of changes that designers and specifiers will need to become familiar with, with respect to both design and construction methods, and in concrete materials technology. The webinar will cover a number of specific alterations in the Standards and the necessary practical design and specification considerations, with the principle objective of clarifying and imparting knowledge with regards to the updates. 

Webinar Topics:

  • Shear and Torsion Design
There has been debate in Australia for a number of years that the shear and torsion provisions in our codes has not been satisfactory. Revisions for shear and torsion therefore have been looked at to more closely align with international standards. Professor Michael Collins provided an insight to this when he presented in Australia in 2014.

This session will look at changes that impact both the bridge standard AS5100 and the concrete structures standard, AS 3600, include updates in compression shear theory, the interaction of shear and torsion together, and look at clarifying requirements for detailing of flexural reinforcement for shear and torsion.
  • Steel Fibre Reinforcement Design
There has been significant change in both AS 5100 and AS 3600 to steel fibre reinforcement design requirements. Provision for SFRC is now contained within a separate chapter, by itself, in both of these standards.
The SFRC design provision in the now released AS 5100.5 is slightly different to what will be found in AS3600, as the theory was based on preliminary information. This session will look at the SFRC design requirements and the improvements to be included in the revised concrete structures code AS3600. Further, there will also be an update in serviceability crack control in AS 3600.
  • Durability Design
AS3600 Concrete Structures has had a rigourous review of the durability information provided in this standard.  This comes on the back of a number of changes that were made to AS5100, along with the introduction of a number of durability documents by the Institute, including Z7/04 Good Practice in Design, Construction and Concrete Supply.
This session will look at the differences in these codes and Standards, and aim to explain how they can be applied in practice. There will also be an opportunity to discuss and compare these differences.


Professor Stephen Foster - UNSW                                             
Professor Stephen Foster is Head of the School of Civil and Environmental Engineering at UNSW, has over 30 years’ experience within the concrete industry and concrete materials field, and has published widely in the civil engineering field. Stephen has particular research interest in bringing new and advanced materials technologies to the engineering of structures. His interests are in the use of high and ultra-high performance concretes, fibre-reinforced concretes and geopolymer concretes and in use of carbon fibre technologies for strengthening and repair of structures and structural systems

Stephen was awarded Honorary Membership of the Concrete Institute of Australia, 2015 in recognition of outstanding contribution to the development and use of concrete in Australia. He is also a prominent member of the Standards Australia committee BD002 that is responsible for the revision and amendments to AS3600 Concrete Structures, and has been particularly involved with the developments for design for shear and torsion, as well as the new provisions for steel fibre reinforced concrete.

Tony Thomas - Chief Engineer – Concrete, Boral Concrete (Retired)                           
Tony has contributed more than 40 years of outstanding service to the concrete industry within Australia. His work in the concrete industry has touched a diverse range of areas including research, construction, advocacy and education, through his many work roles and industry memberships. His knowledge in the concrete area has improved design mixes driving improvement in strength, sustainability and durability performance.

Tony has been a representative on BD002 for AS3600 and BD010 for AS1379. He has also been a very active contributor on the Concrete Institute of Australia’s Durability committee, and was chief author of the Z7/04 Durability document “Good Practice Through Design, Concrete Supply, and Construction”. Tony spent the majority of his working career with Boral and recently retired after holding the position of Chief Engineer at Boral Concrete since 2003.  Tony’s contribution to the industry was recognised in 2017 where he was made an Honorary Member of the Concrete Institute of Australia.