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Has anyone ever used Dexpan or similar products? I have a job coming up with a ton of concrete demo very close to other buildings. I am afraid a breaker will disrupt the other buildings. Any feedback about non explosive demo agents (such as Dexpan) would be greatly appreciated.
I have only use Dexpan a couple of times and he worked pretty well. You just got to make sure you follow the recommendations.
We had used it on one project and they didn't follow the directions to well and we had a major blow-out the next morning when everyone arrived to work.
I used BriStar with some success in a similar application, just follow the recommendations from the maufacturer like James said. I think you will be pleased.
Last edited by demobud; 07-20-2007 at 11:26 AM.
Reason: band aids on fingers
Is it a pain in the ass to drill or the holes? Does takes less time to drill the holes than it would to surgically chip it? Also, is the product tempermental?
The BriStar can be tempermental from my one experience, they have different mixes for different temp ranges. I actually had to reorder beacuase of a cold snap. I can't speak for the other brands, I have only used BriStar the one time. Drilling holes versus chipping? The only reason I used BriStar was that I couldn't cause heavy vibrations beacause the room beneath us was a lab running 24/7. If vibration isn't an issue I would try chipping or sawcutting a relief line and then chipping.
Last edited by demobud; 07-22-2007 at 01:13 PM.
Reason: all thumbs
Is it a pain in the ass to drill or the holes? Does takes less time to drill the holes than it would to surgically chip it? Also, is the product tempermental?
Only for the operator
It really depends on the material you're drilling into.
I forgot to ask another question, what are you removing? Is it a slab? retaining walls? You just said concrete.
It is a 12" thick foundation. The previous owner had the previous demo contractor leave the entire foundation to build the new building on top of it. The new owners and engioneers deemed the old foundation not strong enough to hold the new building. As a result, the entire foundation has to come down. It is 12" to 18" thick, 12' to 15' high, and is approximately 500' to 700' long.
So this is a foundation wall? If that is the case, given the length of the wall I would saw cut to isolate the wall from other structures and hammer it out. Have you got any pics of it?
At 12" I would hammer it too. The rule of thumb is 24". Anything less for the most part it is cheaper to hammer. In NYC it's going to cost you close to $70 per hole to drill it. And the problem there is after you spend all the big $$ preparing it there is no guarantee the expanding grout is going to work.
Non Explosive Demolition Agent
You just said concrete.
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