The material for recycled sub-bases are drawn from crushed aggregates, such as concrete, hardcore, ballast and road planings that are removed from older sites and then recycled. Used for a wide range of applications, recycled aggregates are often a cost effective and environmentally friendly alternative to aggregates.
Made from crushed concrete and other recyclable materials, Type 1 SHW Clause 803 (Formerly DOT Type 1) ranges in size from 63 mm down to dust. When compacted, the mix of solid to fines minimises voids and provides exceptional load-bearing qualities.
Type 1 sub-base is ideal for highly trafficked areas and is most commonly used for car parks, footpaths, driveways, hard standings and building sub-bases.
Using a mix of recycled aggregate, Type 1 Graded is a 50mm, evenly graded material used as a sub-base for haul roads, hard standings and pathways. Although it does not meet the specification for highways works, it is a good alternative for areas that are not highly trafficked.
Granular fill is available in a variety of sizes, which are used as general fill or as capping materials in large-scale ground works and civil engineering projects. Soils and Stone can supply two different graded granular fills: 6F4 and 6F5. These materials typically contain crushed concrete, recycled asphalt and possibly crushed brick.
6F1/6F4 (formerly 6F1 Recycled) is a finer capping layer that is used in the same way as 6F5 but with a finer grading. 6F4 is generally 31.5mm to dust.
6F2/6F5 Recycled is a coarse-graded material ranging from 125mm to dust. 6F2/6F5 is typically used for piling mats, haul roads and temporary hard-standings, such as car parks.
Formerly known as Type 1 X, Type 3 usies a mix of clean, recycled aggregate. It is generally 40mm open-graded with reduced (not zero) fines, making it ideal for drainage. Type 3 is used as a sub-base material when constructing permeable services where drainage is an issue, such as hard standings, pathways, sports pitches and equestrian arenas.
Composed of clean crushed concrete and mortar, our oversized crushed concrete ranges from 125mm to 10mm and has been screened to remove the fines.
Used mainly as a sub-base or drainage layer, this is a cost effective alternative to primary limestone or granite when laying down haul roads, building paths or patio sub-bases, or drainage layers. Oversized crushed concrete is also perfect for wet conditions on site.
Road planings (also known tarmac scalpings or road scalpings) are waste products from roads that have been resurfaced. This is not a graded material and therefore may have variations in size.
Road planings will compact down and are ideal for hard standing areas, haul roads and for building sub-bases and tracks. The material has a high fines content and is not suitable for drainage.
Type 4 is a recycled aggregate that contains between 50–100% of asphalt, and can be mixed with crushed rock or crushed concrete. Type 4 is fully recycled and is well graded. Where available, Type 4 can be used as an alternative to Type 1 SHW Clause 803 (Formerly DOT Type 1).
A 70mm to 30mm screened granite, our recycled track ballast has been washed and screened to remove any lasting debris.
Recycled track ballast can be used to fill voids in the ground and is a great sub-base material. For path construction, it should be covered by a well-graded aggregate to create a smoother surface.
IBA Aggregate is a secondary aggregate and is the ash left after municipal waste has been incinerated. However, it’s not really a powdery ash, as it contains glass, brick, rubble, sand, grit, metal, stone, concrete, ceramics and fused clinker, as well as ash and slag.
Once the large objects (stones, metals and bricks) are screened out, some of the remaining ‘ash’ can be processed into a recycled aggregate.
Why use IBA Aggregate?
IBA Aggregate can be used as a road sub-base material and for specialist bulk fill. Compliant to European and UK Standards and elements of the Highways Agency Specification of Highways Works (SHW 600/800).