What is aggregate subbase?
Aggregate subbase is usually the lowest layer in the pavement structure, as shown in the typical cross sections of the contract plans.
What is class II aggregate base?
Class II Base is a crushed and graded blend of aggregates designed to compact tightly with the proper equipment. It provides an excellent base to concrete pavers and asphalt or can be used alone as a driveway or pathway.
What is the difference between base and subbase?
Base may consist of unbound materials, such as gravel or crushed stone, or stabilized materials, such as asphalt-, cement- or lime-treated materials. The subbase course is typically a granular borrow that is placed between the base and subgrade. It can be constructed as either a treated or untreated layer.
How do I compact aggregate base course?
Compact each layer of aggregate base to at least 95 percent of the maximum unit weight at a moisture content no greater than optimum for aggregate base under concrete pavement. Shape the finished surface and the layer thickness to within ±½ inch of the crown and grade shown on the plans.
What’s the best sub base for a patio?
‘ The most common granular aggregate sub-base is DoT (Department of Transport) Type 1 and Type 3 Limestone. They are both crushed stone: Type 1 has a maximum permitted top size of 63mm, graded down to dust; and Type 3 is an open-graded 40mm unbound mixture with a reduced amount of fines.
Can you use aggregate as sub base?
A sub base is an aggregate or aggregate mix that forms a sound, load-bearing base layer for applications such as the construction of roads, paths and pavements. A sub base aggregate can also be used as a base for patios and artificial grass.
What is Type 2 sub base used for?
Type 2 compacts nicely to form a sound free-draining base for paths, walkways, tracks, patios and driveways. It can also be used to fill pot holes or as a backfill material.
What material is sub-base?
The subbase is the layer of aggregate material that lies immediately below the pavement and usually consists of crushed aggregate or gravel or recycled materials (see Section 6C-1 – Pavement Systems for more information).
What material is used for subbase?
Sub-base material is produced by crushing either limestone or granite rock. The sub-base is designed to evenly spread the load on traffic bearing areas such as pavements and roads. Made up of a load-bearing layer of aggregate, the sub-base is laid on the sub-grade layer below.
How do you compact gravel without a compactor?
How to Compact Pavers without a Plate Compactor
- Step 1: protective clothing.
- Step 2: prepare the substrate.
- Step 3: create a layer of frost protection.
- Step 4: Build the base course.
- Step 5: Apply a layer of sand.
- Step 6: clean the vibrating plate.
- Step 1: Choose the right pavers.
Should you wet type 1 before compacting?
Yes it will be fine, compact it in 50mm layers wetting it before compacting, it will goes as hard as concrete.