Got a heads up for ya Ron. this guy is a member of this forum. No skin off my nose, but I just remembered it.
Lets educate here! What is your way of doing it?
you cant tell the pressure he's using. you cant tell the heat he's using. You cant tell how good the concrete. So I dont think you can or should judge. I've cleaned much and many gum pieces like that and concrete looks fine. I've also hit each piece individually and very carefully and seen damage when it's dry. Unless your the guy with the wand you don't know.
Your right Jon, we do not know. But if your a PM or owner thats suffered the fate of damage it will not get you hired.
If your going to make a gum removal video so the proper methods of removing gum on lower PSI concrete.
Yes you can use 4000 PSI on 8000 psi concrete without damaging it.
The reality is most concrete is sub -standard.
Yup I agree you can't really tell whats going on there. He's holding the wand alot with one hand so I would think the PSI isn't that high. If it hits the surface around 800psi and the water temp is 180 degree's or higher the gum flies away or just melts away on impact. Thats how we do it.