This blog is dedicated to my good friend and concrete colleague Elaine Toogood. She recently inspired me to ‘get off my horse and write my blog.’ This came about through a discussion on sandpaper of all things.
"80 grit? 120 grit or indeed True Grit?" That was the question.
Of course we weren’t discussing the thespian talents of John Wayne or even listening to Glen Campbell... because the usual focus was on Visual Concrete of course. The subject in Elaine's holster was if sandpaper was a good idea to use for cleaning concrete surfaces…
We never got round to having that shoot out before, during or even after Eco Build. So in the spirit of sharing and, as John Wayne once said, “Tomorrow hopes we have learned something from yesterday.” here's what I think:
Ok, so if you want to find your True Grit for dry or wet cleaning concrete then Diamonds are a concrete’s best friend. Flexible Nickel encrusted Diamond hand...
I came across this today giving me an abrupt and sharp reminder of just how sensitive polished concrete floors are when they are young. By ‘young’ I would suggest up to two weeks.
I intend to blog a whole section on polished concrete flooring because frankly the subject needs and deserves it. In the meantime here’s a couple of images of what I would term as differential curing. The first has happened on the day of finishing and the second image has occurred after the floor has been covered.
Power trowel blades if left immobile for any small amount of time at all on the surface will make these marks. I’ve seen it many times and done it once myself. Never again.
The curing line is from a non-breathable type covering or protection sheet that has given rise to a disparity in curing evenness. I’m still trying to get to the bottom of a ‘perfect’ curing system but not found one yet. Please share information if you have any!
If possible my advice is to air cure for 2 weeks...