CaveCreekRay
Well-known member
Lifetime Member
Equipment
L3800 HST, KingKutter box scraper, KingKutter 66" rake, County Pride Subsoiler
More than you want to know but...
Two results from two types of installations...
If you compact tailings in a 2" or greater base, you can get some adhesion between particles if there is enough pressure and there is enough residual tar in the mix, especially on a hot day. This is largely dependent in what type mix was milled, and how it was stored afterwards. Municipalities spray a layer of tar/asphalt goo over the top after rolling it to glue it together and water seal it to prevent undermining of the sub base. Some companies that sell it will add a small amount or asphalt mix as a binder. New asphalt only has about 5% asphalt tar in the mix right out of the factory which acts as a binder to glue the road together. Its the failure of this binder over time that results in water penetration and eventually failure of the base (alligator cracking and then a pothole as the base fails).
If you spread tailings thinly and without pressure (as Ryan appears to be doing), they get contaminated with the dust of the base and don't cling together all that well. What you essentially do is convert asphalt millings into aggregate that is similar to natural aggregate -with one notable exception: Its usually rough and irregular unlike most natural materials that are smooth, resulting in mechanical adhesion. This irregularity means when enough of the material gets laid on a surface, it locks together and is less prone to migration than most natural materials, unless extremely wet to where the sub base gets soft and fails (ruts). Aside from keeping the dust down, this style application (if applied thick enough) will bind with the dirt surface when dry and stay put. Unless crowned, it will still rut when wet in areas of standing water.
(Worked asphalt issues for 17 years in a previous life)
Our town is broke and collects millings from all over the valley. The town spreads it in late Spring and lets cars drive on it for a couple months to compact it and then they over-seal it wit apshalt goo. Makes a crappy bumpy road but its cheap as heck.
Two results from two types of installations...
If you compact tailings in a 2" or greater base, you can get some adhesion between particles if there is enough pressure and there is enough residual tar in the mix, especially on a hot day. This is largely dependent in what type mix was milled, and how it was stored afterwards. Municipalities spray a layer of tar/asphalt goo over the top after rolling it to glue it together and water seal it to prevent undermining of the sub base. Some companies that sell it will add a small amount or asphalt mix as a binder. New asphalt only has about 5% asphalt tar in the mix right out of the factory which acts as a binder to glue the road together. Its the failure of this binder over time that results in water penetration and eventually failure of the base (alligator cracking and then a pothole as the base fails).
If you spread tailings thinly and without pressure (as Ryan appears to be doing), they get contaminated with the dust of the base and don't cling together all that well. What you essentially do is convert asphalt millings into aggregate that is similar to natural aggregate -with one notable exception: Its usually rough and irregular unlike most natural materials that are smooth, resulting in mechanical adhesion. This irregularity means when enough of the material gets laid on a surface, it locks together and is less prone to migration than most natural materials, unless extremely wet to where the sub base gets soft and fails (ruts). Aside from keeping the dust down, this style application (if applied thick enough) will bind with the dirt surface when dry and stay put. Unless crowned, it will still rut when wet in areas of standing water.
(Worked asphalt issues for 17 years in a previous life)
Our town is broke and collects millings from all over the valley. The town spreads it in late Spring and lets cars drive on it for a couple months to compact it and then they over-seal it wit apshalt goo. Makes a crappy bumpy road but its cheap as heck.