100-170mm Black Basalt Gabion Cobbles

100–170mm Black Basalt Gabion Cobbles are a coarse graded igneous aggregate produced from crushed basalt rock. The grading range suits standard gabion basket apertures and large scale containment works. The stone is naturally dark grey to black with angular faces.

Basalt has high compressive strength and low water absorption. The angular shape promotes interlock within cages. The large size resists movement under load and flowing water. The material remains stable under freeze thaw conditions.

This product is used in domestic landscaping walls, commercial retaining features, and civil engineering erosion control. Typical uses include river training, slope stabilisation, and boundary structures. It is suitable for permanent exposed applications.

Grading and Classification

This aggregate is supplied within a nominal 100–170mm size range. Oversize and undersize particles may be present within normal quarry tolerances. The grading aligns with common UK gabion and rock armour applications.

Material Composition

Black basalt is an extrusive volcanic rock formed from cooled lava. It contains dense mineral structures that deliver high strength. The stone is chemically inert and non reactive in ground conditions.

Structural Performance

This aggregate provides mass and mechanical stability in containment systems. Its angular profile creates internal friction when placed. The stone performs under static and dynamic loading.

• High compressive strength supports retaining loads.

• Angular faces improve stone to stone interlock.

• Large particle mass resists displacement.

• Dense structure limits crushing under load.

Drainage and Water Interaction

Basalt gabion cobbles allow free water movement through voids. The open structure prevents hydrostatic pressure build up. The stone does not degrade in wet environments.

• Open voids enable rapid drainage.

• Low fines content prevents clogging.

• Hard surface resists water erosion.

• Suitable for permanent water contact.

Durability and Weather Resistance

Basalt is resistant to weathering and abrasion. It maintains integrity in exposed conditions. The colour remains stable over time.

• Low water absorption reduces frost damage.

• Hard mineral composition resists abrasion.

• Stable colour in UV exposure.

• Long service life in external works.

Standards and Compliance

This material is typically supplied in line with BS EN 13450 for aggregates for railway ballast and similar applications where applicable. It is commonly accepted for gabion and erosion control use under UK practice.

Suitability and Usage Limitations

Suitable For

• Gabion basket filling.

• Retaining wall structures.

• River and stream bank protection.

• Slope stabilisation works.

• Landscape feature walls.

Not Suitable For

• Decorative gravel surfacing.

• Bound or resin applications.

• Concrete production.

• Drainage pipe surrounds.

• Pedestrian surface finishes.

Application Suitability Reference

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.