6F5 Capping (Recycled 6F5)

Recycled 6F5 crushed concrete is a sustainable recycled capping aggregate typically produced from crushed concrete, brick, and asphalt. It conforms to the 6F5 grading under SHW Series 600 for earthworks and capping layers.

The material provides bulk, mass, and load spreading rather than tight interlock. It works by reducing stress on the subgrade and creating a stable working platform during early construction stages.

Recycled 6F5 is not a finished surface material. It is designed for load distribution, not surface tolerance. It is commonly used on domestic driveways, commercial yards, and civil engineering projects. Typical uses include capping layers, haul roads, and temporary access over poor ground conditions.

Grading and Classification

Recycled 6F5 is defined as a wide graded capping material. It contains large particles and a higher fines content than Type 1.

• SHW Series 600 recognised capping grade.

• Broad particle size distribution supports load spread.

• Recycled origin allows variable composition.

Specification Control and Acceptance

Recycled 6F5 is supplied in accordance with recognised UK earthworks classifications; however, final acceptance depends on project-specific requirements.

• Use is subject to contract specification and works information.

• Material suitability may require approval by the project engineer or client.

• Source consistency and grading tolerance vary with recycled supply.

Final suitability is determined by the intended structural role within the ground build-up.

Material Composition and Source

This aggregate is manufactured from recycled construction and demolition waste. Source materials influence particle shape and fines proportion.

• Crushed concrete provides bulk strength.

• Brick and asphalt add grading variability.

• Recycled fines improve ground binding.

Compaction Behaviour

6F5 compacts under heavy plant to form a dense capping layer. Moisture content strongly affects compaction performance.

• Requires mechanical compaction for stability.

• Fines bind when correctly conditioned.

• Over wet material reduces bearing capacity.

Load Distribution Performance

The primary function of 6F5 is to spread imposed loads across weak subgrades. It protects underlying soils from deformation.

• High thickness improves load dispersion.

• Large particles resist punching failure.

• Reduces subgrade rutting under traffic.

Drainage Characteristics

Recycled 6F5 is not a free draining aggregate. Fines content limits water movement through the layer.

• Restricted permeability compared to Type 1.

• Suitable where drainage is not critical.

• Requires separation from drainage layers.

Separation and Interface Control

Where fines content is high or subgrade conditions are weak, a separation geotextile may be used to prevent migration of fines between layers and to maintain layer performance.

Typical Layer Thickness

6F5 is placed in thicker layers than sub base materials. Thickness depends on ground conditions and loading.

• Commonly laid 150–600 mm thick.

• Increased depth for very soft ground.

• Used below structural sub base layers.

Recycled 6F5 is typically used at sub-formation level and is normally overlaid with a structural sub-base such as MOT Type 1 or equivalent prior to surfacing.

Differences Compared to Other Aggregates

Recycled 6F5 differs from other common UK aggregates in grading and function.

• Coarser than Type 1 sub base.

• Higher fines than 6F2 capping.

• Designed for load spread, not finish tolerance.

Suitability and Usage Limitations

Suitable For

• Capping layers over weak subgrades.

• Temporary haul roads and access tracks.

• Ground improvement beneath pavements.

• Working platforms for construction plant.

• Bulk fill where compaction is required.

Not Suitable For

• Final wearing surfaces.

• Drainage layers or soakaways.

• Thin applications requiring tight tolerance.

• Decorative or exposed finishes.

• Areas requiring certified permeability.

Final performance depends on ground conditions and specification requirements.

Application Suitability Reference

Supply and Delivery

Recycled 6F5 is typically supplied loose by tipper vehicle and sold by weight.

• Supplied in bulk for mechanical placement.

• Appearance and composition may vary between loads.

• Coverage depends on layer thickness and compaction method.

Trade Supermarket - UK Supply and Hire Platform

Trade Supermarket is a UK-based platform supplying plant hire, aggregates, and building materials for a wide range of project types nationwide. Products and services are structured in line with recognised UK classifications and standard supply and hire practices.

What Sets Trade Supermarket Apart

• Unified Platform Structure: Hire services, aggregates, and building materials are all managed through one unified system instead of separate suppliers.

• Classification-Led Organisation: Products are shown using standard UK grades, categories, and typical use-cases to help buyers choose accurately.

• Defined Supply Scope: The platform focuses on supplying materials and equipment in a clear, straightforward way, without adding design or installation services.

• Use-Case Neutral Positioning: Products are suitable for home, commercial, and large-scale projects without assuming a specific type of customer.

• Consistent Operational Standards: All product categories follow clear, uniform processes to ensure a steady and reliable experience every time.

Supply and Delivery Responsibility

• Material Variation: Aggregates are natural or recycled materials and variation in colour, shape, and composition can occur between sources and deliveries.

• Quantity and Coverage: Materials are supplied by weight or volume as ordered. Coverage, yield, and performance are influenced by application method and ground conditions.

• Delivery and Site Access: Delivery requires suitable access for the selected vehicle type. Clear access, adequate space, and stable ground conditions must be available at the delivery location.

• Offloading Conditions: Materials are offloaded at ground level only. Placement, spreading, or installation services are not included as part of supply.

• Returns and Surplus Material: Bulk aggregates are non-returnable once delivered. Customers should ensure quantities are calculated accurately before placing an order.

• Supply Scope: Supply is limited to the provision of materials only. Product selection, suitability assessment, and installation remain the responsibility of the buyer or appointed contractor.