[PRCo] Re: Station square

[Derrick J Brashear]

On Thu, 30 Dec 2004, Harold G. wrote:

> Greetings to all/
>
> Two points.   City of Pgh DPW in the 1960's
> was sold on concrete paved streets.  See Penn
> ave downtown, 7trh street, streets around A Ctr and
> E Lib mall, etc.  I liked them.  made every thing
> look clean.  Thats why 2dAve was in coincrete.

Billboards along the PA Turnpike be damned, if you want it to last, you 
pour concrete, on a proper subbase. (well, if you want it to *really* 
last, you use properly fired bricks, and lay them properly, but Grant St 
shows firing is hard, and laying bricks is a lost art; Besides, things 
aren't as smooth, and people don't like that)

The asphalt over concrete that's been happening a lot lately is probably 
an ok compromise; Do sleazy deep-patching, then just roll asphalt over it. 
Asphalt's rutting, binder is gone? Scrape it off the concrete, recycle it, 
and put it down again.

Of course, the usual paving "machine" (typically just a movable jig on a 
track put down to make it easy to continuously pour) would leave cleaning 
to be done if you actually ran it over girder rail; I'm actually somewhat 
curious how they lay concrete over rail. In the old days the answer was 
almost certainly "by hand".