I have a long concrete driveway that has dirt, mold, mildew, algae, or whatever other crap has built up in the small grooves the builder styled into the cement. With the rain, it gets slippery and I'm worried my boy will take a horrible tumble as he's running around faster than he should. Has anyone used chlorine or another chemical or other suggestions for cleaning something like this? Thank you.
Pat, You could try MURIATIC ACID Available from Handyman or Lee Plaza, It is what we use for Cleaning our Concrete. you can get Deck Scrubbers from Handyman for the Scrubbing Just Mix it with Water , Scrub and then Rinse off After. Obviously it may well be a Trial and Error thing Until you find the Right Dilution. Best of Luck But for your reference my friend. http://www.wikihow.com/Acid-Wash-Concrete
I take a good scoop of calcium hypochloride (for my pool) in water and spray. Carful so you don't get it where you don't want.
Pat , a mixture of muriatic acid and water should work, I used it on the clay pavers at my pizza place when they got moldy. Use about 1/5th gallon of acid to 1 gallon of water. Hose the area first with water and work the solution in with a hard stubbly brush (available at city hardware, white bristles and blue plastic). Do about a 10ft by 10 ft area then rinse it off. Continue until done, should work great.. Good luck. I can come help you if needed..09082117077
my vote is pressure washer...dont bother to buy the small cheap model..takes far too long.. Hire someone with a 'commercial type' to do your driveway/sidewalks/rocks...Miguel Chlorine,acid is not so good for anything living...
I use a pressure washer on mine. If I were living there I would pay someone else to use a pressure washer while I had a beer.
