100-200mm Blue Pennant Gabion Stone

100-200mm Blue Pennant Gabion Stone is a naturally quarried sandstone from Wales. It is produced to a coarse grading suitable for gabion containment systems. The stone is angular to sub-angular with a blue grey colour.

The material provides mass and interlock within gabion baskets. Its angular faces resist movement under load. The open void structure allows water to pass freely through the fill.

Typical uses include domestic retaining walls, commercial boundary structures, and civil engineering erosion control. It is commonly specified for highways, waterways, and coastal works and widely used where structural performance, durability, and drainage are required, rather than decorative appearance.

Material Classification and Origin

Blue Pennant is a Carboniferous sandstone known for strength and durability. It is supplied as a primary aggregate. The grading range supports structural stability in gabion systems.

Key characteristics include:

• Natural blue-grey colour variation

• Layered bedding planes

• Dense sandstone matrix

• Proven durability in UK conditions

Particle Size and Grading

This product is graded between 100mm and 200mm. Oversize and undersize are controlled at source. The grading suits standard gabion mesh apertures.

Why 100-200mm Is Used for Gabions

The 100-200mm size range is selected for:

• Retaining walls and load-bearing gabions

• Civil engineering and infrastructure works

• Erosion control and slope stabilisation

Larger stones provide:

• Greater mass per cubic metre

• Reduced internal movement

• Improved resistance to soil and water forces

Structural Performance

The stone performs as a gravity fill within containment systems. Its weight provides resistance to overturning. Angular faces improve internal friction.

• High particle mass increases wall stability.

• Angular shape limits internal settlement.

• Consistent size supports uniform load distribution.

• Hard sandstone resists crushing under load.

Drainage and Water Interaction

The coarse grading creates large voids. Water flows freely through the structure. Hydrostatic pressure is reduced behind walls.

• Free draining structure reduces retained water.

• Low fines content prevents clogging.

• Open matrix supports rapid dissipation.

• Suitable for permeable wall construction.

Durability and Weather Resistance

Blue Pennant sandstone is resistant to weathering. It performs well in exposed environments. The stone maintains integrity under freeze thaw cycles.

• Low water absorption limits frost damage.

• Hard surface resists abrasion.

• Suitable for marine and fluvial exposure.

• Maintains form over long service life.

Visual and Finish Characteristics

The stone has a blue grey to dark grey appearance. Colour variation occurs between faces. The finish is naturally rough.

• Natural colour variation suits landscape structures.

• Rough faces provide visual texture.

• Weathers to a consistent tone over time.

• Commonly used where appearance matters.

Suitability and Usage Limitations

Suitable For

• Gabion retaining walls

• Riverbank protection

• Coastal erosion control

• Highway embankments

• Boundary and landscape walls

Not Suitable For

• Concrete mixing

• Bound surfacing layers

• Decorative gravel use

• Fine drainage layers

• Pipe bedding applications

Application Suitability Reference

Behaviour Inside Gabion Baskets

When confined within wire baskets, Blue Pennant stone behaves as a gravity-based retaining system.

• Angular faces generate strong interlock

• High stone-to-stone friction resists rotation

• Stable voids allow continuous drainage

• Weight distributes loads evenly through the structure

This makes it suitable for walls where both strength and permeability are required.

Installation Considerations

• Compatible with 75×75mm and 100×100mm gabion mesh

• Bedding plane orientation affects face appearance

• Mechanical handling recommended for large projects

• Visual sorting advised for exposed faces

Engineer approval is recommended for walls exceeding standard residential heights.

Coverage & Quantity Guide

• Approx. 1.6–1.8 tonnes per cubic metre

• Quantity varies with basket size and packing method

• Allow 10% extra for face selection and wastage

Durability & Service Life

Blue Pennant sandstone has a long history of use in UK civil engineering. When installed in galvanised gabion baskets, the stone itself has an effectively unlimited lifespan; system longevity is governed by basket specification and environment.

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.