Underground Construction and Concrete

For details on upcoming Concrete Institute of Australia events, please see the CIA website:  www.concreteinstitute.com.au  or contact the QLD Branch Office on (07) 3892-6668 or qld@concreteinstitute.com.au.

Event Sponsors

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When

Tuesday, 18 July 2017
5:00 PM - 8:00 PM

Where

TAFE Restaurant
Level 2 - Block C 66 Ernest Street, South Brisbane QLD 4101

Overview

Placing concrete underground creates a unique set of circumstances for all parties involved; from the designer, the producer, the applicator/placer, the contractor and the tester - all need to change their usual way of doing things to meet the demanding needs of creating concrete structures underground. The seminar will focus on all aspects of both producing and using shotcrete underground, with a special emphasis on critical role of the nozzleman and the influence he has on the quality of the concrete. In recent years, 3 road tunnels in SEQ have been a major source of construction activity but how will they stand the test of time when subjected to the aggressive environment of years of exposure to exhaust fumes and contaminated ground waters?  An exciting insight will be provided into how the performance of concrete can be modelled in such aggressive conditions, thereby providing the client with a valuable life cycle assessment of the asset.  The seminar will provide a valuable insight into recent innovations in reinforcement for underground structures.

Prices

CIA Members $75.00 CIA Student Members $20.00 CIA Retired Members $20.00 Non-members $98.00

Presenters

Mr. Des Vlietstra
Technical Consultant - Elasto Plastic Concrete Pty Ltd

Mr. Paul Sandeford
Principal Engineer - GHD Pty Ltd

Mr. Brad Boardman
Business Development Manager - Bekaert Maccaferri

Topics

Mr Des Vlietstra, Technical Consultant - Elasto Plastic Concrete Pty Ltd
Aspects of producing, placing and testing quality shotcrete
In his capacity as a a Certified EFNARC Nozzleman Examiner, Des will explore all aspects of shotcrete - both from a materials perspective as well as the importance of the competence of the nozzleman. Aspects such as material choices, aggregate gradings, admixture usage and production/placing techniques for shotcrete will be explored along with the sometimes difficult means by which concrete can be tested for compliance when sprayed underground - often many hundreds of meters from the surface. Des will also provide an insight into a selection of case studies where shotcrete has delivered results.

Mr Paul Sandeford, Principal Engineer - GHD Pty Ltd
Carbonation Modelling in Road Tunnel Linings
Paul's extensive knowledge of the mechanisms of corrosion of steel in concrete is highly regarded by the concrete industry in Australia and this knowledge was recently brought to the fore in providing Brisbane City Council and the consortium building the latest of Brisbane's tunnels - Legacy Way - with a valuable insight into the future.  Exhaust gases emitted by all types of vehicles - both now and in the future - will ingress into the concrete lining of the tunnel as well as other reinforced concrete elements within the tunnel and the impact of this ingress needed to be taken into account when designing concrete mixes for Legacy Way.  Paul will cover the way in which carbonation can impact corrosion thresholds of steel in concrete and will highlight how modelling processes were used to assess the degree of protection afforded to embedded steel in reinforced concrete elements within the tunnel.

Brad Boardman, Area Sales Manager Oceania - Bekaert Maccaferri
Reinforcement options in underground construction
Reinforcement options - both ferrous and non-ferrous - for designers of reinforced concrete structures underground have evolved massively over the past few years and continue to develop. Brad will cover these options and discuss how each can provide the designer and contractor with the ability to design and build unique reinforced concrete structures underground. With road tunnels going deeper and longer - particularly in Europe - the ability to build efficient and safe tunnels in concrete are stretching the reinforcing envelope.

Program

4.30 pm Registration Commences - Tea and coffee will be served
 
5.00 pm Welcome & Introduction
 
5.05 pm Commencement of Speaker Presentations
 
7.00 pm Question time to panel of Speakers
 Light refreshments served after conclusion of event
8.00 pm Seminar closes
 

Communication Devices

 
Please note that audio and video recording or taking photographs is prohibited during this event without express approval from the Concrete Institute of Australia.

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