WASHED ROCKS is a washed coarse aggregate produced from the highest quality Ordovician Dolomitic Limestone. It is manufactured to specified physical properties and sizes. Because the material is washed, it contains minimal fines and reduced deleterious materials. Pattison WASHED ROCKS reduces the amount of costly additives required to produce concrete. It extends the life expectancy of roads, reduces cracks, freeze/thaw impacts and maintenance costs.
the highest quality requirements including Class 3i and 3ib which can be used
in interstate highway paving, bridge decks and overlays. It is
approved for FAA airport paving, IADOT, MODOT, MNDOT, and NEDOT
It produces the finest aggregate available from one of the
hardest limestone ledges in all of Iowa.
product of years of design, development, innovation, and
the diligent efforts of some of the finest engineers in the
aggregate production industry.
into our aggregate production plant. Small aggregates are loaded
directly from plant to rail car, using a custom designed, state
of the art, loading system.
Washed Rocks - Ordovician Dolomitic Limestone
Washed Rocks
Also known as concrete stone, washed base material, washed stone, D467, D57, D67. Pattison produces Concrete Stone from Ordovician Dolomitic Limestone in our state-of-the-art, jaw/cone crushing plant. Our plant features sophisticated compression crushing technology that reduces fines and increases fractured faces.
Washed Rocks Production
This material is frequently ordered with specific physical properties. Pattison’s quarry offers a variety of ledges that meet these requirements. Material sourced from these ledges is durable, has minimal deleterious materials and performs above requirements on freeze thaw, abrasion, specific gravity and absorption tests.
Washed Rocks Certifications
This product meets Iowa’s highest usage designations as Class 3i and 3iB. It can be used in interstate highway paving, bridge decks and overlays. Pattison’s Washed Rocks is approved for FAA airport paving and other federal projects. It is certified for Department of Transportation work in Iowa, Missouri, Nebraska, Minnesota.
Direct Rail Loadout
With our direct to rail transfer system, WASHED ROCKS products move quickly from production to rail loading with minimal handling, dramatically reducing product degradation, and material handling costs. Here’s what Wikipedia has to say
More about Ordovician Dolomitic Limestone
When it comes to rock, age really matters. Ordovician Dolomitic Limestone is some of the highest quality, hardest and most durable anywhere in Iowa. Ordovocian formations are only found in the northeast portion of Iowa. Pattison’s Clayton, IA quarry site is right in the middle of it.
Concrete Stone Certifications
| Certifications | Sizes | Tech Size | Material Type |
|---|---|---|---|
| IADOT #4 IADOT #3 IADOT #5 | D467 D57 D67 | 1-1/2" x 3/8" 1" x 3/8" 3/4" x 3/8" | Dolomitic Limestone |
| MNDOT 467 MNDOT 67 | D467 D67 | 1-1/2" x 3/8" 3/4" x 3/8" | Dolomitic Limestone |
| MODOT Gradation D | D67 | 3/4" x 3/8" | Dolomitic Limestone |
| NEDOT Class E | D57 | 1" x 3/8" | Dolomitic Limestone |
| FAA D57 FAA D67 | D57 D67 | 1" x 3/8" 3/4" x 3/8" | Dolomitic Limestone |
Concrete Stone Properties
| Property | Value |
|---|---|
| Abrasion | 28% to 35% |
| Absorption | 1.00% to 2.05% |
| Specific Gravity | 2.65 to 2.71 |
| "A" Freeze | 1 to 2 |
| Chert (concrete stone only) | 0.0% to 0.8% |
| Magnesium Sulfate Soundness | 2.0% to 12.9% |
| 14 day reactivity | .02% to .04% |
| 28 day reactivity | .05% to .06% |
| Durability Factor (ASTM 666b) | 102.1% to 103.1% |
| Insoluble Residue | 1.03% |
State of the art Aggregate Plant
Pattison’s newly installed Cone Crusher and production plant is state-of-the-art, producing some of the highest quality Ordovician Dolomitic Limestone Washed Rocks.
Material is separated into various required sizes without inducing fractures, while yielding a refined individual rack shape that is the most desirable for tight compaction and stability. Pattison’s new aggregate plant produces Washed Rocks of exceptional quality.
Logistics second to none
Pattison recently completed its Rail Spur project, extending multiple rail lines directly into our new state-of-the-art aggregate production plant!.
Pattison’s advanced direct to rail loadout system coupled with the Pattison rail spur allows aggregate products to be loaded directly from the production plant on to enclosed rail ore cars for delivery. Eliminating excess handling saves costs, and insures a higher quality product.
Pattison High Quality Aggregates and Proppants
Pattison produces high quality ordovician dolomitic limestone Aggregates and silica proppants. Â Our Clayton IA, quarry contains multiple limestone ledges yielding material with a variety of properties that meet various requirements. Â Our products are certified for use by multiple state Departments of Transportation, and the FAA.
Revetment Stone
Asphalt Stone
Ballast Stone
Concrete Stone
Clean Stone
Fine Aggregate
RoadRock
Proppants
Specialty Products
Contact our Aggregate Sales Team for more information!
Contact our Aggregate Team Now!
Our quarry is located in Clayton, IA. We are one of the only sources of Aggregates and Proppants that can load directly to Rail, Truck or Barge from the same facility! Our logistic & delivery systems out pace our competitors. We’d love to hear from you!
Contact information
Aggregate Team
: (563) 964-0106
: AggInfo@pattisonsand.com
Main Office
701 1st Street
Clayton, IA 52049
: (563) 964-2860
: info@pattisonsand.com
Operations Office
24312 Mississippi Rd., Clayton, IA 52049
Hours of operation
Office Open Monday – Friday: 8am to 4pm
Operating Hours – 24/7