Pump truck lets concrete loose over building

[billrt]

Hi Guys. I have posted this also on another site to be honest.
Just looking for help. Last year I bid on a job to remove mortar blasted all over a section of a building . 100 feet by 4 stories to be cleaned .the building is 12 + stories big money building . Lots of people traffic a real nightmare.
Now a year later I get the ok . I put a lift to work I am using nmd-80
7 hours later I am making no headway the mortar will not break up .
Any suggestions on something different to use. I have used it 3x1 2x1 and straight. I have used pressure and hot water. I do not want to damage the limestone . Any help is a great help
Thanks
Bill Regan
Regan and Son Power Washing
914 443 9758

[Scott Stone]

I I think I can safely say that you are out of luck, and probably should not be doing this. The building owners made their decision by being indecisive. My thought is that your best bet would be to chip it off with a hammer drill on the hammer function. There might be other options, but I do not know what they are.

[weaselcossey]

Call eacochem, see what they suggest. That's their product, right?

Try this stuff: Concrete Restoration & Cleaning I've never used it, andd who knows what will happen to the limestone.

This stuff is supposedly safe on paint, brass, glass, etc:
Cement Remover

Drastic times call for drastic measures, good luck.

[Beth n Rod]

If it is not removed within 30 days cure time, you cannot remove it by conventional means. It will need to be blasted off.

Rod!~

[Joe Ortiz]

Cant remember his name but hes a new guy on here.But hes been in the concrete bizz for a while. hes on a few other posts here.good luck.m best bet is a chisel and hammer too.

[Paul Kassander]

This is a product used to clean concrete trucks that is supposed to work on some thicker build up. Kleen Krete: Construction: Progressive Solutions Corporation

[Palmetto Home and Deck]

Originally Posted by Paul Kassander

This is a product used to clean concrete trucks that is supposed to work on some thicker build up. Kleen Krete: Construction: Progressive Solutions Corporation

Paul beat me to it, but this might work. I use to use it to clean concrete buckets of dried concrete build up back when I was in bridge construction.
Call your local concrete company to see what they have. Most concrete companies sell supplies such as this to contractors as well as having it for their own use.

What you are up against right now is well beyond this, but one trick I used when ever we accidentally got concrete spatters on some of our equipment and didn't discover it until after it had dried was to spray some WD-40 on it and let soak a while. It doesn't dissolve the concrete, but it seams to penetrate it enough to loosen the bond between it and what ever it was own so you can scrape it off easily with a plastic putty knife without harming the paint or glass. I use it now on new home clean up when I find concrete spatters on windows and vinyl siding etc.