Aggregates
JTC operates three quarries on the Island, producing sand, gravel and all grades of crushed rock at Dereneneach Quarry on the String Road near Shiskine.
We have several grades of stone, sand and gravel in stock at all times and can also produce special grades to order, for large quantities.
We have a wide range of quarry materials available for uplift or delivery:
Angular Crushed Chips – 10mm, 20mm & mixed
Chips are ideal for garden landscaping, decorative driveways, car parking areas, drainage, and mixing concrete.
Gravel / Pebbles – 10mm, 20mm, 30mm & 50mm
Clean Stone – 50mm
Fine materials have been removed from our clean stone and it is therefore suitable for use in wet conditions, such as drainage works.
Gabion & Armour Stone
Type 1 Hardcore
Type 1 is a mix of crushed stone from 40mm down to dust which creates a compact aggregate with excellent load bearing qualities.
Concrete Sand, Building Sand & Concrete Mix
We can supply concrete sand for concrete mix and block paving base, and building sand for mortar and floor screeds.
Cobbles – Large & Medium
Concrete
Our concrete plant and mixes are BSI Quality Assured as accredited by UKAS.
This means that we a hold BSI Kite mark License for our concrete production and that we fully comply with BSEN 206-1 and BS8500.
We supply sustainable concrete mixes as standard, this can save up to 130 kg/of CO2 per m3 depending on the mix design.
Sustainable concrete mixes also reduce the risk of thermal cracking and increase the durability, especially in coastal locations.
Our engineer, Adrian Cannon, has a qualification in Concrete Technology and can assist with any special requirements.
