Commercial Construction & Contracting Resources

Construction Aggregate: 4 Common Stone Grades and Their Best Uses

Posted by Eric Park on December 8, 2017

Whether you’re trying to lay a strong base or to stop the powerful force of erosion, construction aggregate is an essential tool. It’s being blasted, as we speak, from a stone quarry near you.

Without proper support, your construction project is sure to crumble. Decay often begins deep down where you can’t see it. Different grades of stone aggregate serve many purposes, each of them essential to a quality job that’ll stand the test of time.

Here are 4 common “flavors” of construction aggregate. (OK, so we don’t recommend tasting the rock. Please, don’t take a bite unless you want a chipped tooth.)

Using Different Stone Grades to Solidify Your Project

Here are the most common coarse and fine stone flavors we use (as uniformly recognized by the Ohio Department of Transportation). They’re each ideal for specific purposes.

1. A Flat, Smooth Base

You’ll want the following grades to achieve the proper strength and grade:

#57

Park Enterprise Construction crushed stone

Size: 1.5”-1.0”

Consistency: Clean

Purpose: A common bed for underground pipe utilities. It’s easy to rake and adjust by hand, and perfect for protection and support. It’s also used as a top layer to spruce up an all-stone parking lot, or as a flat, sturdy base for laying concrete.

 

#304

Park Enterprise Construction crushed stone

Size: 1.5” stone-fine grains

Consistency: Stone and dust

Purpose: You can’t have a sturdy driving surface without proper support beneath. Its dusty nature makes it ideal for compaction and laying a strong foundation. An experienced contractor digging a utility trench through a driving surface will first lay #57 around the pipe and then a

layer of #304 aggregate to support the new pavement above. #304 is also the most popular product used in road and parking lot base construction.

 

#411

Park Enterprise Construction crushed stone

Size: 1.0” stone-fine grains

Consistency: Stone and dust

Purpose: This looks a lot like #304. But, a shade smaller, this grade of stone is even easier to maneuver. Your contractor can use it for fine grade or to fill or to build a berm beside an asphalt or concrete surface.

 

#8

Park #8 1.jpg

Size: .375” and less

Consistency: Clean

Purpose: Used to fine grade under a concrete surface and also in the production of concrete and asphalt. It’s a great top dressing for stone driveways.

 

2. Some Extra Stability

The ground beneath a commercial asphalt parking lot, for instance, must support both the driving surface and the vehicles using it. An experienced contractor will proof a dirt foundation for stability by driving a fully loaded dump truck over it. Weak areas will allow depressions or begin pumping up mud from beneath.

An experienced contractor will dig down a few feet and install these larger stones as an anchor.

 

#1

Size: 3.5”-1.5”

Consistency: Clean

Purpose: Base and bridging soft areas.

 

#2

Size: 2.5”-1.5”

Consistency: Clean

Purpose: Base and bridging soft areas. Some municipalities will mandate bases of #1s and #2s when installing streets and roads.

 

#4

Size: 1.5”-.75”

Consistency: Clean

Purpose: Base and sometimes a filter in leech beds.

 

3. Extra Muscle

Water erosion can be a devastating force. Sometimes you need some muscle to stand, like a bodyguard, between the threat your property or project. You’ll see these at bridge abutments and culverts, as well as along the shorelines of waterways.

Meet your tough guys:

Riprap.jpg

A Rip Rap

Size: 24”-18”

Consistency: Clean

Purpose: To stop water washout or prevent it.

 

B Rip Rap

Size: 18”-12”

Consistency: Clean

Purpose: To stop water washout or prevent it.

 

C Rip Rap

Size: 12”-6”

Consistency: Clean

Purpose: To stop water washout or prevent it.

 

D Rip Rap

Size: 6”-3”

Consistency: Clean

Purpose: To stop water washout or prevent it.

 

4. The Sustainable Option

While rock formations excavated for crushed stone are among the most abundant natural resources on the planet, recycling old road material is an economical and sustainable option. Using this product also prevents old concrete and asphalt from being dumped in unwanted areas or needlessly filling valuable landfill space.

You can squeeze every last bit of value out of your driving surface - even after it’s been ripped up by the milling process.

 

Crushed Asphalt

Park Enterprise Construction crushed stone

Size: 1.0”-fine grains

Consistency: Clean

Purpose: An attractive top dressing for stone parking lots and driveways. It’s an excellent dust suppressant, and can also be to make new asphalt pavement.

 

Crushed Concrete

Park Enterprise Construction crushed stone

Size: 1.5”-fine grains

Consistency: Stone and dust

Purpose: A cheaper alternative to #304, it achieves great compaction to form a solid foundation. It’s widely used where limestone is not available.

 

Flavors of Construction Aggregate and their Best Uses

Beneath all solid buildings and roads are different grades of construction aggregate keeping them in place. Each grade, whether it’s the size of a boulder or a grain of sand, carries its weight and more.

Let’s find the right grades for you.

 

Contact Us Here To Talk More 

Topics: foundation stone, stone mix, construction aggregate, crushed stone, construction stone

Written by Eric Park