Wasden Posted May 6, 2013 Report Share Posted May 6, 2013 Is there any other reason for this other than rusting iron within the concrete? Click to Enlarge 74.9 KB Quote Link to comment Share on other sites More sharing options...
Marc Posted May 6, 2013 Report Share Posted May 6, 2013 Poorly applied parging, improperly consolidated pour. Marc Quote Link to comment Share on other sites More sharing options...
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