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Concrete In Australia : June 2011
6 Concrete in Australia Vol 37 No 2 NEWS An analysis of potential climate change impacts on the deterioration of concrete infrastructure has been released by CSIRO. The report aims to allow engineering designers, asset managers and other professionals to understand the ramifications of a changing climate on concrete infrastructure. It also aims to provide guidance to assist appropriate adaptation responses at the design and maintenance stages. The report’s lead author, CSIRO Climate Adaptation Flagship’s Dr Xiaoming Wang said: “Failure to consider the effects of climate change may compromise the safety of concrete structures but, overcompensating in our efforts to adapt for climate change may unnecessarily increase costs.” Concrete deterioration is caused by a range of physical, mechanical and/ or chemical factors. One of the major threats to the longevity of concrete structures is carbonation, which occurs when atmospheric CO2 penetrates into the structure to expose steel reinforcements to corrosion. Corrosion caused by chloride penetration is another serious threat to concrete durability causing cracking, delamination, or spalling, especially in marine and coastal areas. Chloride-induced and carbonation- induced corrosion of concrete infrastructure are directly affected by environmental factors such as temperature and humidity. Carbonation is also affected by the concentration of CO2 in the atmosphere. All these factors Consider a changing climate in concrete design, report recommends Designers need to consider a changing climate in their predictions of deterioration rates for the nation’s concrete-based infrastructure. Photo: Xiaoming Wang, CSiRo Concrete Institute of Australia Office contact details National and NSW Branch Suite 401, Level 4, 53 Walker Street North Sydney, NSW 2060 PO Box 1227, North Sydney 2059 Phone: 02 9736 2955 Fax: 02 9736 2639 Email: email@example.com firstname.lastname@example.org Web: www.concreteinstitute.com.au Queensland Branch Suite 2, Level 2, 485 Ipswich Road Annersley, QLD 4103 Phone: 07 3892 6668 Fax: 07 3892 5655 Email: email@example.com Victoria Branch 2nd Floor, 1 Hobson Street South Yarra, VIC 3141 Phone: 03 9804 7834 Fax: 03 9827 6346 Email: firstname.lastname@example.org South Australia Branch PO Box 559 Marden, SA 5070 Phone: 08 8362 1922 Fax: 08 8362 1822 Email: email@example.com Western Australia Branch 45 Ventnor Avenue West Perth, WA 6005 Phone: 08 9389 4447 Fax: 08 9389 4451 Email: firstname.lastname@example.org Tasmania Branch 2 Davey Street Hobart, Tas 7000 Phone: 03 6221 3715 Fax: 03 6224 2325 Email: email@example.com