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SMA tarmac

blumeeni

Registered User
yep sure are and yep sure is
wondered when you'd raise your ugly ed

say summin sensible then
 
P

Pablo2

Guest
blumeeni said:
So glad you liked it and there's plenty more of it if you want.
Boring bl4hbl4h . You can do better than this surely?
 
B

bishbosh

Guest
On the subject

http://www.slambikers.co.uk/index.php?option=com_content&task=view&id=87&Itemid=70

Here's an extract from Sargent Allen of Derbyshire Constabulary.

"SMA is a kind of cake mix within the tar and it's all laid on the road surface in one go which means that all the stones have a coating of the binder material which is oil based. "When you skid a car over that, one of the by products of friction is heat and we believed that that heat was melting the binder which was lubricating the patch between the tyre and the road and that's what was extending the skidding distance."

So SMA is a wet road until the oil coat has worn away - eek! :bang:
 

ericonblackbird

Registered User
So SMA is a wet road until the oil coat has worn away - eek!
yep but I have noticed one 'interesting' thing on my daily commute it doesn't melt like the old cr.p that is at either end of a stretch that I go over. Needed my waterproof (tar proof?) boots last week.
 

blumeeni

Registered User
I've noticed the same thing but don't be fooled when it's hot the binding agent gets all waxy
 

blumeeni

Registered User
They say it can remain slippery for up to two years until traffic has worn in the surface
but we on our bikes take a different line through a corner than that of a car
so chances are even on a surface which has been down a good while we'll be powering out of a corner on shit that's still not worn in
 
P

Pablo2

Guest
dayglow said:
bed time reading ...know your subject stuff
Excellent!

It appears that the industry is very much digging it's heels in...reading http://www.surfacefriction.org.nz/downloads/PDFs/session%202/2%20%20HALE%20S%20-%20It%20was%20the%20roads%20fault%20...%20FP.pdf in particular.

The fact that a conference has been convened purely for this topic is good news, but this is what it has to say about those who should attend :

dayglow said:
This conference is of interest to all who deal with highway and runway management and maintenance.
It will be of particular interest to:
  • Asset Managers
  • Safety Engineers
  • Road Controlling Authority Engineers
  • Airport Infrastructure Engineers
  • Maintenance Contractors
  • Consultants
  • Crash Investigators
  • Surface Friction Experts
  • Researchers
No motoring organisations of any hue!!

More important if dull reading at http://www.dft.gov.uk/stellent/groups/dft_rdsafety/documents/page/dft_rdsafety_031312.pdf addresses the question as to whether safety and road accident reduction is on the agenda for local authorities. The answer (on page 24) isn't that encouraging....I think it would go under the heading of "sort of".

I suspect what will happen is that these SMA surfaces will be coated with some temporary surface that has better grip and will wear away as time goes by.

Cheers...P
 

ericonblackbird

Registered User
Did you know that this subject had been raised in parliament with 'the biking' Secretary of State Ladyman being questioned.............nice on message replies!

http://www.publications.parliament.uk/cgi-bin/newhtml_hl?DB=semsimple&STEMMER=en&WORDS=stone%20mastic&ALL=&ANY=&PHRASE=%22stone%20mastic%20%22&CATEGORIES=&SIMPLE=%22stone%20mastic%22&SPEAKER=&COLOUR=Red&STYLE=s&ANCHOR=muscat_highlighter_first_match&URL=/pa/cm200506/cmhansrd/cm060214/text/60214w23.htm#muscat_highlighter_first_match
Oh and another time and this contains the wonderful exchange
Bill Wiggin: To ask the Secretary of State for Transport what recent research his Department has undertaken on the coefficient of friction of stone mastic asphalt with regard to motorbikes. [30867]
Dr. Ladyman: No specific research has been undertaken on the coefficient of friction of stone mastic asphalt with regard to motorbikes. Development of the UK standards for the measurement of road surface friction has been based on research that is applicable to motorised vehicles in general.
http://www.publications.parliament.uk/cgi-bin/newhtml_hl?DB=semsimple&STEMMER=en&WORDS=stone%20mastic&ALL=&ANY=&PHRASE=%22stone%20mastic%20%22&CATEGORIES=&SIMPLE=%22stone%20mastic%22&SPEAKER=&COLOUR=Red&STYLE=s&ANCHOR=muscat_highlighter_first_match&URL=/pa/cm200506/cmhansrd/cm051122/text/51122w21.htm#muscat_highlighter_first_match
 

blumeeni

Registered User
and another vicim

Stan and me got a m8 who we ride with now n then he had an off last Sunday on the same corner,same time of year as me

he's a quick good rider

his tyres let go mid corner for no apparent reason he wasn't going too fast,he didn't do nuffin to cause it they just let go just like mine did

he slid down the road till he hit the corner apex of the kerb he and the bike were catapulted over a hedge and into the field

he was lucky he got away with a bust toe and a bit of gravel rash plus some bruises

the bikes a right off and he only got 3rd party cover

this road surface is now about 3yrs old

they still got slippery road signs up and it's still slippery
but it looks lol

it's called SM fukcing A wot a surprize eh
 

Smix

Fcuk Up Fairy
Poor bloke - at least he is ok. Is there no come back through anyone ref replacing the bike?? At the end of the day, if there are slippery road signs up then surely they know there is an issue?? As it is known that the surface isn't tested for bikes and laid anyway, surely there is something he can do? Is it worth him fighting for any kind of compensation from people that decided to lay surface or manufacturers??? ? Am I just being naive and silly??!!! h1d1ng2
 

blumeeni

Registered User
yo smix

we're hoping there's gonna be some recourse against the council but I'm not gonna hold my breath

will keep you posted as things unfold
 

mick the knife

Registered User
Smix said:
Poor bloke - at least he is ok. Is there no come back through anyone ref replacing the bike?? At the end of the day, if there are slippery road signs up then surely they know there is an issue?? As it is known that the surface isn't tested for bikes and laid anyway, surely there is something he can do? Is it worth him fighting for any kind of compensation from people that decided to lay surface or manufacturers??? ? Am I just being naive and silly??!!! h1d1ng2[/QUOTe)

How can anyone be naive, or who gives a monkeys, when they`ve got an arse like that:lick:
 

silverfox.xx

quocunque jeceris stabit
Smix said:
Poor bloke - at least he is ok. Is there no come back through anyone ref replacing the bike?? At the end of the day, if there are slippery road signs up then surely they know there is an issue?? As it is known that the surface isn't tested for bikes and laid anyway, surely there is something he can do? Is it worth him fighting for any kind of compensation from people that decided to lay surface or manufacturers??? ? Am I just being naive and silly??!!! h1d1ng2
Humm, slippery roadsigns depict a car skidding, perhaps that's misleading, and the sign should be a motorbike mangled. So your point about there being a skid sign/car does not clarify that a bike could be bent.... Not hitting on you my lovely, but a point that its misleading to bikers....

Blu perhaps you should support your friends claim on the council for incorrect signage...:dunno:
 

Smix

Fcuk Up Fairy
silverfox.xx said:
Humm, slippery roadsigns depict a car skidding, perhaps that's misleading, and the sign should be a motorbike mangled. So your point about there being a skid sign/car does not clarify that a bike could be bent.... Not hitting on you my lovely, but a point that its misleading to bikers....

Blu perhaps you should support your friends claim on the council for incorrect signage...:dunno:

My point is not that they put up signs showing skidding cars, but that a known slippery (and untested for motorbikes) surface is laid, and then slippery surface signs are put up as a matter of course. this must mean they know they are laying an unsafe surface? Therefore the responsibility lies with those laying the surface? Putting up signs to cove an unsafe surface surely isn't the way do proceed??? c7u8 c7u8
 

silverfox.xx

quocunque jeceris stabit
Smix said:
My point is not that they put up signs showing skidding cars, but that a known slippery (and untested for motorbikes) surface is laid, and then slippery surface signs are put up as a matter of course. this must mean they know they are laying an unsafe surface? Therefore the responsibility lies with those laying the surface? Putting up signs to cove an unsafe surface surely isn't the way do proceed??? c7u8 c7u8
Agree, but its like, they put 'slippery when wet signs' in every shop entrance when its raining, cus they don't want to dry the floor....
However the car sign 'slippery surface' does not really cover the potential 'death' for bikers... as you say 'untested for motorbikes'.
 
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