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Seems Like a Step Backward to Me

Seems Like a Step Backward to Me

RE: Seems Like a Step Backward to Me

Makes perfect sense - cold in-place recyling.  Chewing up the damaged upper layers, adding bitumen and cement, recompacting to form a stronger base - then chip seal - used extensively in Australia, my mum's area of Indiana, etc.  Good sense.

RE: Seems Like a Step Backward to Me

Jed
Not sure of the ADT, nor the condition of the subbase....but if the exist. material is a good thickness and AC content of old ACP: if it is reclaimed and regraded/ compacted during the hot season.....the R.A.P.(reclaimed asphalt conc pavt.)will grade out nicely and "resemble" tight graded new ACP mat over time.

The major problem we have seen with using only RAP on a rdwy not having adequate drainage is potholing out.

Have seen "rejuvinator" products used...with limited success to assist in old dried out pavements that have been reclaimed....but always placing a new ACP mat over the top.

 

RE: Seems Like a Step Backward to Me

Excellent method.  Have used it numerous times here in Florida to reclaim base material.  We grind and mix the existing asphalt in with the existing base, inject asphalt emulsion (and sometimes cement if material is clayey or overly wet), compact and add asphalt layer(s) on top.  If no cement in mix, priming not required.

Very cost effective.  Very fast, except in urban/suburban areas where you have to work around manhole covers/inlets.

RE: Seems Like a Step Backward to Me

The counties mentioned in the article aren't reclaiming the old road to use as subbase, they are converting paved roads to granular roads.

I've heard that for ADT's below 150, paving often isn't cost-effective.

     "...students of traffic are beginning to realize the false economy of mechanically controlled traffic, and hand work by trained officers will again prevail." - Wm. Phelps Eno, ca. 1928

RE: Seems Like a Step Backward to Me

But they'd be better off to do a double chip seal - where my mum lives in IN, when I was a kid, a lot of the roads were gravel - they were okay - but there was only one lane - down the road centreline (okay, not much traffic) - then they started chip sealing.  This is fine (as the Aussies know) but, yes, you do get some chipped windshields, but the roads are good.  I'd suggest the chip seal over leaving the gravel only.

RE: Seems Like a Step Backward to Me

These gravel roads would have been a treat where I grew up.  We just had mud roads.

RE: Seems Like a Step Backward to Me

Mud roads? We would have been ecstatic to have mud roads! Our roads were made of wet peat!

http://www.youtube.com/watch?v=Xe1a1wHxTyo

     "...students of traffic are beginning to realize the false economy of mechanically controlled traffic, and hand work by trained officers will again prevail." - Wm. Phelps Eno, ca. 1928

RE: Seems Like a Step Backward to Me

(OP)
Aye, you were lucky!
My favorite Monty Python skit of all times.   

RE: Seems Like a Step Backward to Me

Did anyone else but me notice the irony of the top poster's name versus the thread topic?

:)

Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East - http://www.campbellcivil.com

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