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Re: [greenyes] Question


Susan,
Having been through the process of getting glass included in the spec's for
highway materials for the state of NM I may be able to help. Essentially,
glass becomes a component of conventional basecourse which displaces some
portion of other aggregates.
In traditional base course.....various gradations of material are blended to
produce a final product....a portion of which is "fines" which create the
dust. Crushed glass will generally not displace the "fines" portion of base
course, more commonly it will replace a 3/8" minus rock, obviously depending
on the gradation of glass being produced.

In short, I would say that glass will have no impact on dust generation from
base course. I would guess that even if WYDOT was willing to use the finer
glass produced from a crushing operation to supplant the "fines" portion of
the mix, dust problems will remain.

If you would like a copy of the new NMDOT spec let me know.....
Justin

----- Original Message -----
From: "Wayne Turner" <WAYNET@no.address>
To: <greenyes@no.address>; <susankramer@no.address>
Sent: Tuesday, May 18, 2004 8:25 AM
Subject: Re: [greenyes] Question


> Susan,
>
> Your question might best be answered by your state Transportation
> Department that can either approve or disapprove materials destined for
> use in building roads and highways. There are certain performance
> requirements that the materials have to meet before they can be
> approved. I suppose it is possible that in an area beset by frequent
> droughts that dust generation is a factor in deciding the
> appropriateness of a road material.
>
> Wayne
>
> >>> Susan Kramer <susankramer@no.address> 05/18/04 09:48AM >>>
> Dear GRRN:
> When I have a question I can not resolve, asking the listserve usually
> provides an answer.
> Here in Wyoming we are experiencing another year of drought.
> Today's question: Would using recycled glass for road base decrease
> the
> amount ot dust that is generated by driving?
> Susan Kramer
> Pinedale Wyoming
>
>
>
>
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