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Figures 1-3 show the use of ECC for patch repair of a bridge deck in Michigan, US (Li and Lepech, 2004). While the average daily traffic count is relatively low, a large number of 11-axle gravel trucks use this structure, greatly adding to the load magnitude. Over two years of service life, including two winters of Michigan weather conditions with many freeze-thaw cycles, the ECC patch remains in good condition, with microcracks limited to 30 micro-meter. In contrast, the surrounding concrete placed one day earlier, is exhibiting cracking with crack width in the mm range. This is likely one of the very few HPFRCC applications that have been exposed to real weather and service loads and continuously monitored (for over 700 days) for performance.
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