Removing Cement Splatter from Exposed Aggregate

• 

  MS Paint on 14/02/2022 - 15:18

  +6

  Gloves
  Glasses
  Hydrochloric acid
  Scrubbing brush / broom
  Hose
  Pressure washer
  Have fun

  Personally I'd be more concerned about that huge transformer outside your bedroom.

  • 

    Drakesy on 14/02/2022 - 17:14

    When i was in urban infrastructure we had a case like this, although the transformer ended up roughly 1.5m away from the living quarters (builder just built to the plan and didn't look at the proximity to the transformer.)

    Builder ended up knocking down the room and taking a 2x1m chunk out of the area. Still on hot days, having one of these buzzing a couple of meters from my face doesn't sound fun.

    • 

      wau2 on 14/02/2022 - 17:26

      Bedrooms are all at the back of the house. Front room is just a book/entertainment area which doesn’t get used at all. Funnily enough never hear it at all

• 

  AndyC1 on 14/02/2022 - 15:18

  +2

  I have seen water pressure cleaners get this sort of stuff off, but the machines were using a petrol engine. So you will need to hire one.

  Have a look at these and try one:
  https://www.kennards.com.au/cleaning-and-floor-care/pressure…

• 

  Headless on 14/02/2022 - 15:20

  Sounds like you need to claim on the contractors insurance!

• 

  apu on 14/02/2022 - 15:26

  +1

  It looks like it's just residue/silt from the aggregate clean. Try a pressure clean as it doesn't look too stuck on.

• 

  payless69 on 14/02/2022 - 17:02

  Hydrochloric acid,
  Patience,
  Protection,
  Profound eye for detail…..

• 

  Catullus on 14/02/2022 - 19:47

  Yep, if it's cement, then hydrochloric. Not sure of dilution, try 10% first and scrub, then, say 15% and move on up till you get action. Don't worry about a pressure washer. Wear specs, but otherwise no probs, except if you got any cuts.

• 

  yellowfever on 14/02/2022 - 20:35

  Not here to answer the question but that first photo is a terrible job.
  Why wouldnt they/you saw cut the old section and pour a neat and straight new section
  Just looks horrid having to look at that everyday

• 

  Edgecrusher on 15/02/2022 - 21:35

  Hydrochloric acid is the most effective, but least safe option. It used to be used to clean build up on the back of agitator trucks.

  There are other options nowdays, but they probably are t suited to your application (gels etc).

  It will also eat the base concrete as well, be aware of that.
  Get the right Ppe include respiratory, you don’t want to breath it in.

  The greener it is, the easier it will be to get off. If it’s still very green you may have luck with a high pressure pressure washer.

• 

  wau2 on 16/02/2022 - 20:18

  Thanks all, I might try the industrial pressure washer first. Then if it doesn’t work then acid