Just saw your question. Yes – something we’re actively exploring. Cost of sensors that work reliably across temperature and outdoors (in rain, snow, etc), and battery life (or power availability) are a big factor for long-term wireless monitoring. There are many tradeoffs to ensure accuracy. For example, you don’t want it to appear that the crack moved 0.5mm just because the temperature or humidity changed (unless the crack really moved). This is just one example but there are many other challenges to overcome that balance cost, accuracy, wireless range, complexity, and so forth.
]]>As to rebar coatings, the color I keep seeing on CalTrans projects is purple. As I am sure you know, color as been used as an indicator of many traits, not all of them obvious. Just for fun, I will contact CalTrans and find out what that color denotes, and I will share that here.
Stainless steel rebar? Awesome! Most of our projects are with well-heeled clients, but thus far I have not seen an engineer courageous enough to spec stainless steel. If I ever meet one, I will be sure to send you photos!
Thanks, too, for the link to the article. Very informative!
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