Wednesday, August 6, 2008

MRR2: Halcrow said the cracks was due to DEF

Halcrow's senior consultant (bridge engineering) Roger Buckby said the primary cause of the cracks was the delayed ettringite formation (DEF)




Collepardi said: in the absence of any of these elements (as shown in the diagram above), DEF-related deterioration cannot occur.

Below is the DEF crack pattern:








Below is the crack pattern on Pier 28:








How can this be due to DEF?

4 comments:

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