# Keynote: American Concrete Institute, Philadelphia – 3D Printing in Concrete and the Fast Arrival of New Construction Methodologies
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I drove my family crazy with the lead-up to this keynote.   It would take a lot of hard work. My keynote would require a solid foundation, and my message would take some time to settle. (They told me to stop it with the concrete jokes soon enough.) This was the first time this organization had a keynote speaker to open their conference, and it was obvious that there was some concern about bringing in an outsider to launch the event! That changed fast — feedback had me hitting a huge home run, with subsequent coverage in American Concrete Magazine and elsewhere. In this shot, I’m talking about how quickly the concept of 3D printing with concrete is becoming a reality.  

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Source: https://jimcarroll.com/2016/10/american-concrete-institute-philadelphia/