Control of concrete cover depth of reinforced concrete structures for durability

Author(s): G. Nganga, M.G. Alexander, H. Beushausen
Paper category: Conference
Book title: Concrete Repair, Rehabilitation and Retrofitting III (ICCRRR)
Editor(s): M.G. Alexander, H.-D. Beushausen, F. Dehn, P. Moyo
Print ISBN: 978-0-415-89952-9
Publisher: Taylor & Francis Group
Pages: 154 – 155
Total Pages: 2
Language: English

The durability index-based performance approach in South Africa requires verification of concrete cover properties, its penetrability (using durability indices) and depth. This paper provides a summary of data analysis done on cover depth readings of in-situ structures (bridges) and precast elements (median barriers) from a large scale project in which these specifications were implemented. The assessment of cover depth for a structural element is based on the average of scanned areas. The limit value provided in specifications is 40 mm and it was observed that the average cover depth readings from the bridges and precast median barriers comply with this value. However, no value is provided on permissible proportion below the minimum (30 mm) and above the maximum (55 mm). The variability for in-situ structures was observed to be considerably higher than that of precast elements which indicates that specified cover depths with low variability can be obtained on structures when appropriate quality control is implemented.

Online publication: 2014
Publication Type: abstract_only
Public price (Euros): 0.00