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Posted: Fri Oct 04, 2013 1:56 pm
by Benpearce
Hi all. Newbie here.
I have just laid approximately 60 m² of York stone sets. I am looking for some advice around what is the best kind of pitch to use. Most of the builders merchants round here don't seem to understand what it is.
Are there any brands I should be looking out for? If so, what are they, merchants Etc. . .
I am based in West Yorkshire, near Hebden Bridge.
Many thanks in advance
Ben
Posted: Fri Oct 04, 2013 2:18 pm
by Tony McC
Posted: Sun Nov 10, 2013 6:49 pm
by imasleepdontbotherme
Hi, I have been searching for just this topic. I was wondering if you can used the bitumen emulsions to seal inbetween cobble sets insted of the hot melt bitumen.
Many Thanks
Posted: Sun Nov 10, 2013 7:26 pm
by Dave_L
Bitumen emulsion for pitch jointing???? I don't think so!
Posted: Sun Nov 10, 2013 7:32 pm
by msh paving
Definate No MSH 
Posted: Sun Nov 10, 2013 8:54 pm
by Tony McC
The clue is in the name - it's an emulsion, so too liquid for jointing setts.
I'm overseeing the pitch jointing of a sett driveway this week, hopefully, so will be planning to get some good photies to document the procedure.
Posted: Sun Nov 10, 2013 9:44 pm
by imasleepdontbotherme
Hi all, I have never used or even seen the bitumen emulsion.
I have read that it is a mixture of bitumen, water and addetives, when the water evaporates it reverts back to bitumen.
Is this the case or does it still stay soft?
I would have thought that as it was more of a liquid it would penertrate more into the aggragate blow.
Many Thanks
Posted: Mon Nov 11, 2013 8:33 am
by Tony McC
You will have seen bitumen emulsion almost every day, but probably never realised what it was.
The black stripe or 'overbanding' that you see between two lanes of bitmac on the roads? That's a form of bitumen emulsion, but the most common one is the thinner, less viscous form used to paint or prime the edges of bitmac layers before new bitmac is placed against them.
It does revert to a modified form of bitumen as the solvent (water) evaporates, but it's the wrong form for jointing setts. It's either too tacky or too fluid, whereas the modified bitumen for jointing setts has various fillers and modifiers which stiffen it and render it sufficiently inpenetrable so that it holds the setts (or other paviors) fast with a small degree of flexibility.
Posted: Tue Nov 12, 2013 4:50 pm
by DNgroundworks
Ive done a little bit of pitch jointing, i bought 40kg "bitumen slugs" from the builders merchants, seemed to work fine, was this the right stuff Tony?
Just a little advice if you go down the melting of bitumen route, warm the burner up slowly as it spits little bits of hot tar at you otherwise, which are rather uncomfortable, and dont get it to hot, first time i did it a few years ago i set it on fire and it was a nightmare to put it out! Had to fabricate a 10ft bloody pole to lift the lid back on from a safe distance LOL Had a few lads ready with 9" inch hollow block to pin the lid on :p