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5:18 PM
September 2, 2009
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I am in the concrete cutting and breaking business and have tried Dexpan, Betonamite, Bristar, Demosol and Cracker....nothing has worked to my expectations until I used Sylentmite, purchased from a Canadian distributor.
In the past the job took 24+hrs to complete and in one instance 3 days! I got the job done with Sylentmite in 100 minutes! The product is advertised at 20,000PSI and to work within 90-120 minutes, and I witnessed this myself.
Anyone who is looking for non-explosive demolition agent and wants quick results I would highly recommend Sylentmite, it is the most advanced from all the products I've tried.
Good luck ! hope that helps
Jrockbreaker
Welcome to the forum jonnywag,
Please bring something to the table and not just spam with your own products, tell us why it's better, tell us something.
Hi - At last there is a new solution available - check out SYLENTMITE [removed link]. We have a Major Distribution Centre in New York, also available on the West Coast, and in 9 Countries around the world.
Works similar to the other mentioned products but in a mush faster time period. that's [Removed link]
MERRY CHRISTMAS TO ALL!!
Depending on the finnish requrements, maybe using a concrete crusher could be the best solution! no vibrations, no sound and a quite controlled way to break concrete!
A Brokk 90 or 180 with a Darda CC320-420 crusher is a very fast solution!
I will try to upload a video to our youtube site for you to see! i have a project vere i will use a Brokk 40 with Darda CC260 crusher to break a 23cm (9") thick wall. No need to cut or use noisy hammers.
the CC320 can also be attached to a 1,8-> ton mini excavator.
used dexpan once it worked but the 2+ inch hole was a tough drill, had to hole cut it couldn't find a hammer drill bit big enough,couldnt get a core saw company in there to do it,and they didn't try the smaller hole size, dang air drills are heavy,there was so much rebar in it that it really was a pain. it did bust it thoo
Yeah Bud, they are heavily reinforced. I dread the idea of drilling through all that #11 rebar. Brings back memories of Tenneco. The only differance being alot of horizontal jack leg drilling.
I used Bristar one time to crack some machinery bases on a floor above a 24 hour operation QC lab. The hardest part was drilling past the rebar. As I recall it cracked it enough to use a torch and a bobcat to cut and rake away the debris.
Hey John,
With correct usage, this shouldn`t be a problem. Our DEMOSOL Cracking Agent (Demosol - Cracking Agent | Demolition Agent) product provides up to 19,000 PSI. You would need to drill 1 1/2" - 2" holes, 90-95% of the depth.
Reading these posts has me curious about this stuff. I looked at a project with heavy turbine foundations, where the columns are 7'x8' thick, 30 feet tall. the building stayed and you have no good access other than the overhead crane. wire cutting would work, but as you know is expensive. Would Bristar work on something this massive? I couldn't imagine it would. Anybody out there ever used it on anything this big?
Demosol - Cracking Agent | Demolition Agent
We provide a Non-Explosive Demolition Agent, similar to Dexpan.
Feel free to e-mail me for a great deal, or if you would like to sample the product.
[email]info@demosol.com[/email] 
Thanks,
Ryan
NYC Demo;6417 said:
I am going to test sections before I go balls to the wall.
How did you do the job? did you try Dexpan? i have a quite hard time to belive that it works in heavy reinforcement:rolleyes:
last year we had a bank wault that was a pain in the a** to demolish:ph34r:
The biggest machine we could bring inside was a Brokk 180, and it was a quite small machine for the task.
The concrete hardness was 120 (the hardest available), and it had extreme reinforcement. it was a quite big wault and it took almost 200 Brokk hours to break 
I do not have pics. My concern with hammering is that the vibration and proximity to the adjacent buildings with disturb the buildings. I was think of sawcutting sections and tipping the wall over into the jobsite then breaking it once on the ground. I am going to test sections before I go balls to the wall.
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?
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.
NYC Demo;6352 said:
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? :spinningsmile: You just said concrete.
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.
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?
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.
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.
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