Concrete Technical Group

Concrete Corrosion and Durability Q&A

The NSW Branch’s invited a panel of experts for an evening discussion of Concrete Corrosion and Durability. Each panellist has a career of experience in the protection of concrete structures and we had a great chance for them to give their firm opinion to your questions. During the registration process, we invited our attendees to...

Cathodic Protection of Concrete Structures Q&A Webinar

The ACA NSW Branch hosted a unique Q&A webinar session on cathodic protection of steel-reinforced concrete structures, featuring six industry-leading guest speakers. Our guest panel discuss impressed current, hybrid, and sacrificial CP systems as well as some related topics submitted by the audience.

The Importance of Concrete Surface Preparation

The third and final of the ACA and ACRA series of joint webinar presentations on Silicosis and its prevention. Adequate surface preparation is the key to successful concrete repair and concrete protection projects. Inadequate surface preparation often leads to the failure of the repair or coating necessitating further re-work, incurring added expense, facility operational downtime and compromised integrity of the remediation and protection works.

Dust Control in Construction

The second in a series of joint webinar presentations on Silicosis and its prevention, presented by ACRA and The ACA. The presentation gives the audience a view of how much dust normal operations of drilling, cutting and grinding concrete generate. It then covers the engineering controls available to manage dust emission and how you use these in conjunction with PPE to ensure operators/supervisors remain well below the required Silica dust levels.

Steel reinforcement corrosion in concrete | Warren Green; Vinsi Partners

Organic Corrosion Inhibitors | Jessi Jackson Meyer; MCI

Organic Corrosion Inhibitors - Presentation by Jessi Jackson Meyer. This video is taken from the 2017 Brian Cherry Symposium.

New Zealand Experiences with Concrete Service Life Prediction Models: A Brief History

N. LeeOpus Research, Petone, New Zealand SUMMARY: As an island nation, much of New Zealand’s infrastructure and many of our metropolitan areas are in close proximity to the sea and reinforcement corrosion due to chloride ingress has long been presumed to present the primary threat to the longevity of reinforced concrete structures. This paper presents...

Modelling Durability of Reinforced Concrete Structures

R.E. Melchers Centre for Infrastructure Performance and Reliability,The University of Newcastle, Australia SUMMARY:  Management of reinforced concrete assets increasingly relies on analytical models to predict the time to reinforcement corrosion, particularly to serious, damaging corrosion. Increasingly it is found that predictions by existing models for the onset of chloride-induced reinforcement corrosion do not compare well...

Concrete Road Bridges | Barry Wright; NZTA

Speaking as a "low tech client" Barry Wright takes us though the process of identification and remediation of bridges in New Zealand.

Organic corrosion inhibitors – new build and existing structures performance

Corrosion of embedded steel is a leading cause of deterioration in reinforced concrete structures.

Brian Cherry Paper Series

Over the next few weeks we will be publishing a series of digital papers collated from the 2017 Brian Cherry Forum. These papers are free to read for ACA members. Our first paper is "Up to Date Overview of Aspects of Steel Reinforcement Corrosion in Concrete" by Warren Green, Frank Collins and Maria Forsyth.

Predicting long-term durability of steel reinforced concrete with calcium nitrite corrosion inhibitor

N. S. Berke1, M. C. Hicks2 1Tourney Consulting Group, Kalamazoo, Michigan, USA 2Grace Construction Products, Cambridge, Massachusetts, USA Summary: Steel reinforced concrete is one of the most durable and cost-effective construction materials, but it can suffer in high chloride environments from corrosion due to chloride-induced breakdown of the normal passive layers protecting the steel. One...

NZTA Experiences with the Protection and Repair of Concrete Road Bridges

This post is taken from an original paper presented at  Brian Cherry International Concrete Symposium 2017. Author:Barry Wright New Zealand Transport Authority A summary of New Zealand Transport Agency (NZTA) experiences with corrosion of concrete road bridges on the NZ state highway network.  In summary it covers research findings together with specific examples of corrosion...

Is Surface Preparation for Concrete Repairs a Fad?

BE PREPARED – Is Surface Preparation for Concrete Repairs a Fad? Hamid Khan – Product Segment Manager, Parchem Prior to the commencement of concrete repairs, the fundamental thing to consider is surface preparation. The amelioration of damaged concrete structures involves many elements, from engineers, applicators and even legal counsel. This paper details the primary value...

Holiday Detection on Coated Steel and Concrete Structure

I’m often asked questions about holiday testing or, as the Europeans call it,porosity testing. Of course, pinholes in a newly applied coating can leave the substrate exposed to the environment and vulnerable to corrosion. It is the coating inspector’s job to detect and document these defects. [wppdf id=’2417′]