Bradshaw Schist

Bradshaw Schist is a distinctive metamorphic rock quarried from the Bradshaw Mountains, specifically the Hassayampa District in Arizona, USA. Known for its appealing aesthetic, this schist exhibits a color palette ranging from grey, dark brown, and bronze to teak, wine, and verdigris, with a characteristic rusted appearance. A particularly notable tone is brown, which often serves as a base or dominant undertone.

Physical and Mechanical Properties:

• Water Absorption:Typically low to moderate, as with most schists, indicating decent resistance to water penetration.
• Density:Approximately 2.7 - 3.0 g/cm³, though this can vary depending on the exact mineral composition.
• Flexural Strength:Typically ranges from 8 to 15 MPa, reflective of its layered structure and inherent fracture tendencies.
• Compressive Strength:Generally ranges between 70 and 150 MPa, similar to other schists, which supports a moderate load-bearing capacity.
• Hardness:On the Mohs scale, typically between 4 and 6, demonstrating a moderate level of scratch resistance.
• Porosity:Generally low, contributing to its water resistance and suitability in various environments.
• Slip Resistance:Rated as moderate to high, making it suitable for both indoor and outdoor applications, especially in slip-prone areas like pool decks and walkways.

Chemical and Mineral Composition:

• Quartz: 25 - 50%
• Mica (Muscovite and Biotite): 20 - 30%
• Feldspar: 20 - 35%
• Chlorite: 5 - 15%
• Garnet: 0 - 5%, depending on specific sample
• Iron Oxides: Contribute to the rusted verdigris appearance, present in small amounts.

Usage:

Interior Applications:

Flooring, wall cladding, kitchen countertops, and decorative elements.

Exterior Applications:

Façades, landscaping elements, garden pathways, and pool surrounds.

Maintenance:

• Regular cleaning with non-abrasive cleaners.
• Periodic sealing recommended to enhance water resistance and longevity, particularly in high-contact areas.

Cutting Sizes (cm):

• Available in a variety of customizable sizes; common cuts include:
• Tiles: 30x30, 60x60
• Slabs: 100x200, 120x240
• Custom size options available based on project needs.

Common Surface Finish Options:

• Polished:Enhances color vibrancy and produces a smooth, reflective surface.

• Honed:Matte finish, offering a muted look that is less prone to scratches.

• Brushed:Creates a textured surface, improving slip resistance.

• Split-faced:Retains natural ruggedness, popular for exterior applications and feature walls.

• Sandblasted:Roughens surface, increasing slip resistance while maintaining aesthetic appeal.

Bradshaw Schist's unique colors and textures make it a versatile choice for both aesthetic and functional construction solutions, offering a blend of natural beauty and reliable performance characteristics.