What is Primary shingle?
Primary shingles are graded stone taken from natural deposits in the ground, sea or rivers. It can also be made from crushed quarry won material. It comes in many different grades but most commonly in 4-10mm (known as pea shingle), 10-20mm, or 20-40mm.
What are shingles used for?
Shingle is used for road and pathway surfacing, pipe bedding, as a fill material, and in some drainage applications. It is often mixed to make concrete. Some aggregates are used on driveways or in landscaping to provide a decorative finish.
What is the bulk density of shingles?
4-10mm = 1.39 tonne per m3 loose or 1.46 tonne compacted.
10-20mm = 1.42 tonne per m3 loose or 1.55 tonne per m3 compacted.
20/40mm – 1.36 tonne per m3 loose or 1.47 tonne per m3 compacted.