For what it's worth, I also just had my first flat of the summer from a shard of the dark glassy material that is covering my neighborhood's streets. Now that they have swept up the excess it's not too bad. I just wish they would swept during the temporary street parking ban. I watched the sweepers pass around many parked cars, leaving large areas on the edges of the pavement unswept - right where we ride. On Aug 9, 2011 11:50 AM, "Michael Lemberger" <[email protected]> wrote: > Hi All, > > The city's page on the subject is here: > > <http://www.cityofmadison.com/streets/maintenance/repair.cfm> > > They state that the aggregate gets swept after the tar material has cured, and it would appear that this has happened on many of the streets I ride in the Westmoreland and Tokay neighborhoods. > > I think they are using boiler slag as an aggregate: > > <http://www.fhwa.dot.gov/pavement/recycling/recwslag.cfm> > > "When molten boiler slag comes into contact with water, it immediately fragments becoming coarse, angular, glassy particles. WBBS is a porous, glassy granular particle that is primarily regarded as a single-sized coarse to medium sand." > > So yes, that sounds like it would be sharper than pea gravel. I had my first flat of the year after riding on newly-sealed streets on my commute. I suspect that the problem will go away when most of the loose material is gone, but my solution was to switch to tires with a puncture-resistant kevlar or aramid belt. Works like a charm. > > Though we may not like this stuff, it seems like it significantly increases the life span of asphalt-paved roads at a fraction of what it would cost (in money or material) to repave them. Overall a positive, I'd say. > > Michael > > >> Can anyone comment about this [below email from Ald. Lisa Subeck]? Anyone had a similar experience? Heard other complaints? Know if a new material is being used? >> >> I had an email about a problem in Fitchburg forwarded to me this AM, so Steve Arnold may be familiar with this, but is Madison also using something sharp and pointy as aggregate? > > > _______________________________________________ > Bikies mailing list > [email protected] > http://lists.danenet.org/listinfo.cgi/bikies-danenet.org
_______________________________________________ Bikies mailing list [email protected] http://lists.danenet.org/listinfo.cgi/bikies-danenet.org
