AARoads Forum

National Boards => General Highway Talk => Topic started by: Brian556 on August 16, 2019, 12:50:12 AM

Title: Workers Putting Down Plastic? When Building Road Base
Post by: Brian556 on August 16, 2019, 12:50:12 AM
US 70 Valliant, OK. In GSV, you can see workers rolling out plastic or some other rollable material. it is being placed between layers of the road base. Anybody know exactly what material it is or the reason for using it? I've never seen this before

https://www.google.com/maps/@34.0152291,-95.1595262,3a,15y,76.19h,85.43t/data=!3m6!1e1!3m4!1s8SKmPpfcnH0emfvLQ1cQxw!2e0!7i13312!8i6656 (https://www.google.com/maps/@34.0152291,-95.1595262,3a,15y,76.19h,85.43t/data=!3m6!1e1!3m4!1s8SKmPpfcnH0emfvLQ1cQxw!2e0!7i13312!8i6656)
Title: Re: Workers Putting Down Plastic? When Building Road Base
Post by: Bitmapped on August 16, 2019, 01:50:22 AM
It looks like it might be a geotextile to assist with stabilizing and draining the base.
Title: Re: Workers Putting Down Plastic? When Building Road Base
Post by: silverback1065 on August 16, 2019, 06:12:20 AM
Ya likely geogrid. In Indiana it's called "subgrade treatment type 2"
Title: Re: Workers Putting Down Plastic? When Building Road Base
Post by: Road Hog on August 17, 2019, 11:39:54 PM
Iíve seen this proposed as a way to keep cracks in the base from propagating to the road surface, but Iíve never seen it myself actually used in practice.
Title: Re: Workers Putting Down Plastic? When Building Road Base
Post by: cpzilliacus on August 20, 2019, 07:52:54 PM
I saw the contractors working for WVDOT/DOH installing some sort of black plastic after the subgrade was ready but before the rebar was placed (and obviously before concrete was poured) on ADHS Corridor H between Dominion Virginia Power's Mount Storm Generating Station in Grant County and the current western terminus of eastern Corridor H near WV-32 at Davis.

Map here (https://www.google.com/maps/dir/39.2093149,-79.273805/39.1389369,-79.4592427/@39.1761847,-79.4054461,12z/data=!4m2!4m1!3e0).