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Posted: Sun May 24, 2015 11:04 pm
by neatcon
Hi all I was locked out there for a while, I am just wondering do any of you have problems when laying Stone mastic asphalt with the water and dust from concrete paths/edging etc staining the finished product. I have tried everything to eliminate this power washing the roller covering the patches etc, I have it down to a minimum, its as if the water is boiling on the material and leaving like a rusty stain.
Posted: Mon May 25, 2015 10:03 am
by tarmal & Co
Yes I know what you mean about staining. I too keep my roller as clean as I can change my water in tank before laying. Hose the finished layer off. But the odd bit of staining seems to happen like a dust on top. I had one customer moan a little, I explained it will wear off I went back and checked a couple of months later it was gone. New Sma/bitmac seems to attract dirt. I too would like to know if any one has any ideas.
Posted: Fri May 29, 2015 10:36 am
by Dave_L
Roller stains on a hardstone SMA can sometimes be due to limestone filler dust used, it is quite prevalent from one particular quarry I use but they warn you of this.
Looks unsightly but given time, sunlight and use they soon disappear.
Posted: Fri May 29, 2015 10:37 pm
by neatcon
Some of the stains are from water and will wash out if hosed immediately, it seems that the water is boiling on the SMA there is a product currently being used on a runway in Dublin airport that totally eliminates any staining, I will get the name of from the cube in my local quarry, only heard of this product recently.
Posted: Sat May 30, 2015 10:42 am
by Dave_L
No doubt a runway product will be very expensive!!
Posted: Sat May 30, 2015 10:02 pm
by neatcon
I think it was €3000 per 1000ltr cube, not sure of the ratio to water but wil ask the questions and the ingredients might help out a few here.. I tried a plumbing product once that keeps the heating system clean, it did work but the complete driveway had a dull look about it when finished but no staining and that was SMA from a limestone plant.
Posted: Sun May 31, 2015 3:36 pm
by tarmal & Co
Yeah the cemex plant I go to told me yesterday that they do add limestone dust as fillers to their sma out of there chimney air filter system to get rid of it.
Posted: Sun May 31, 2015 4:50 pm
by Dave_L
I've found only using a pure hardstone SMA (no limestonne filler dust) is the only way to a completely clean surface.
Posted: Sat Jun 13, 2015 9:34 pm
by neatcon
Bituslip is the product that was used in Dublin airport to prevent staining etc, it is a release agent for trucks but it was used on the rollers in the water to stop staining and to keep the surface clean.
https://www.google.ie/url?sa=....w35jkZA