Materials – Top Grade Site Management (2024)

FAQs

What is the difference between 6aa and 21AA? ›

21A Gravel is made up of small particles and makes a great base for patio and paver bases. 6A Crushed Concrete is a clean crushed concrete which is often used as a base for driveways or walkways. It can also be used in muddy areas.

23A Road Gravel

Has a higher clay content than 22A, and is typically used to build up and maintain road shoulders.

“Type 17” Gravel Borrow City and State Spec is not a recycled product but instead a mixture of bank sand and (drain rock) and is excellent for use as a structural, compactable fill material for residential or other construction uses.

Class 6A material is a selected and well-graded granular fill, that is used in highway construction.

21A Limestone is a base material that is roughly 3/4" down to fines. The crushed stone and fines interlock and compact well together. This type of gravel base is used mainly as a base material underneath patios, walkways, sidewalks, driveways, under pavers, flagstone and steppers, walls, or even for a gravel driveway.

It primarily consists of crushed stone, typically a clean aggregate with a single size of 125mm. However, it can sometimes include small amounts of smaller materials. It serves as starter layer and is applied as the first layer or layers of fill above the existing ground level or any ground that has been improved.

ABC Stands for Aggregate Base Coarse. This gravel is used as a hard pack sub-base compaction material for a variety of applications, most common applications we see are for base material for pavers, segmental retaining walls, or concrete slabs. It is made up of a mix of crushed stone, topsoil and dust.

#2, #3 or #23 Stone

– Larger construction aggregate that is most often used and the base material for all types of excavation projects. Product is primarily 3” to 1” size crushed stone with minimal smaller materials. Ideal for projects starting on dirt that will finish with a thicker stone pad.

In contrast to A gravel, the rocks in B gravel only have to pass through a 150 mm sieve, which means this gravel is a lot coarser in texture. Both A and B gravel include not just stone, but also things like clay and sand, in their mixes, which affects which applications they are best for.

Aggregate is a landscaping term that's used to describe coarse to medium grain material. The most common types of aggregate that are used in landscaping include: crushed stone, gravel, sand, and fill. Varying in material and stone size, each type can have its own purpose when it comes to landscaping projects.

What is the difference between Class 2 and Class 5 gravel? ›

Class 5 is great for driveways, parking lots and road construction projects. It's also a good base for concrete patios or driveways. This limestone product is tan to light gray in color and is ¾" on the top size down to dust. Class 2 is great for driveways, parking lots and road construction.

It's commonly used as a sub-base material for sports pitches, ensuring that the ground remains stable and water drains away efficiently. It's also perfect for permeable paving and Sustainable Drainage Systems (SuDS). Other typical uses include equestrian arenas, driveways, paths, patios and tennis courts.

Type 7 Aggregate. 1007.4. 1 Type 7 aggregate for base shall consist of crushed stone, sand and gravel, or reclaimed asphalt or concrete.

AASHTO has created standards for guiding different aggregate specifications, including sizes and gradation requirements, in concrete mix design. AASHTO #10 is a grade of crushed stone dust valued for its cleanliness and resistance to compaction.

22A (Stabilized Gravel)

Good for starting a new driveway and parking lots. Works well for filling pot holes in gravel driveways. 21AA can be used to top a driveway already established with the 22A.

About 22A Gravel

A compactable mixture of 1-inch natural crushed stone, sand, and clay--most commonly used as a base or stabilizing layer for roads and gravel driveways.

A general fill and sub base aggregate, 6C aggregate is washed and well-graded. Used as a medium for drainage for large pipework, trenches and general landscaping works. CONFORMS TO: Class 6C specification within Series 600 of the SHW (Specification for Highway Works)