Video | Business Headlines | Internet | Science | Scientific Ethics | Technology | Search


Concrete Doesn't Always Last Forever (4/8/00)

Concrete Doesn't Always Last Forever (4/8/00)

Researchers have been investigating ways in which concrete can be made more resistant to common types of deterioration.

“To many people, concrete symbolises strength, function and reliability. Yet despite concrete’s image as a permanent material, the last 20 years or so have seen many concrete structures world- wide being repaired to restore their original performance, ” said research leader, Sue Freitag, of Central Laboratories of Opus International Consultants Ltd.

“Much of our infrastructure is close to the sea, so salt-induced corrosion of steel reinforcement is common. It is also the most severe form of concrete deterioration in New Zealand,” said Ms Freitag.

“As well as finding ways to reduce the risk of corrosion, the research also examines the effects of the stone which is used to make concrete and how this effects long-term performance.

“Current information about the behaviour of the raw materials used to make concrete in New Zealand isn’t good enough to confidently predict the likely life of concrete structures at the time they are designed and built.

“Although concrete technology developed overseas can be applied here, we need to find out more about our own local materials,” said Ms Freitag.

Results from the study, which is an investment of the Foundation for Research, Science and Technology, will help New Zealand designers and specifiers select materials that will produce more durable concrete.

“Ultimately this information will tell us if and when repairs are likely to be needed, so the lifetime cost of the structure can be estimated at the design stage,” said Ms Freitag.

For further information:

Sue Freitag, of Central Laboratories of Opus International Consultants Tel 04 587 0600, { HYPERLINK "" }

Madeleine Setchell, Foundation for Research Science and Technology Tel 04 498 7806, Mobile 025 40 60 40

© Scoop Media

Business Headlines | Sci-Tech Headlines


Frog Recruitment: Kiwi Workers Reluctant To Make Business Trips Across The Ditch Despite Trans-Tasman Bubble Opening

When the trans-Tasman travel bubble opens today, many Kiwi companies won't be rushing to buy an air ticket, reluctant to cross the ditch to do business. The latest survey conducted by leading recruitment agency, Frog Recruitment of nearly 1,000 New Zealand ... More>>

Tourism: Employers Welcome Back Working Holidaymakers

Tourism businesses gearing up for the return of Australian visitors from next week will be relieved to learn that they will also have access to an offshore pool of much-needed job candidates, Tourism Industry Aotearoa says. Tourism employers around ... More>>

Commerce Commission: Latest Broadband Report Confirms Improved Performance Of Premium Fibre Plans

The latest report from the Commerce Commission’s Measuring Broadband New Zealand programme shows that the performance of Fibre Max plans has improved substantially. This follows a collaboration between the Commission, its independent testing partner, ... More>>

Air New Zealand: Capital Raise Deferred

Air New Zealand has decided to defer its planned capital raise to later in 2021 allowing more time to assess the impacts of recent developments on the airline’s path to recovery. 'We’ve seen some clearing of COVID-19 clouds recently, with ... More>>

Stats NZ: New Report Shows Impact Of Demands On Land In New Zealand

A new environmental report released today by the Ministry for the Environment and Stats NZ, presents new data on New Zealand’s land cover, soil quality, and land fragmentation. The land cover data in the report, Our land 2021 , provides the most ... More>>


Stats NZ: March Card Spending Rebounds Despite COVID

There was a lift in retail card spending in March following a fall in the lockdown-disrupted February month, Stats NZ said today. Seasonally adjusted retail card spending rose by $53 million (0.9 percent), compared with February 2021. Visit our website to read ... More>>

PwC: Outcome Of Review Into Air New Zealand Gas Turbines Business

Air New Zealand has received the report into its Gas Turbines business from independent external advisers PwC. Air New Zealand Chairman Dame Therese Walsh says the report identified a range of effective controls in the Gas Turbines revenue contracting ... More>>