Gris Robledo Granite

Gris Robledo Granite is a compact and fine to medium-grained granite that originates from the Robledo region in Albacete, Castile-La Mancha, Spain. The granite showcases a subtle, neutral grey palette with a blend of grey, black, and white speckles. Its appearance is defined by interlocking mineral crystals which contribute significantly to its strength and stability, making it a popular choice for various construction and architectural applications.

Physical and Mechanical Properties:

• Water Absorption: 0.1%
• Density: 2660 kg/m³
• Flexural Strength: 102 kg/cm²
• Compressive Strength: 1381 kg/cm²
• Hardness: Generally high, typical of granites, contributing to its scratch resistance (specific Mohs hardness not listed)
• Porosity: Low, due to its compact nature
• Slip Resistance: Generally good, though it can vary depending on the surface finish

Chemical and Mineral Compositions (% by weight):

While specific percentages may vary slightly, typical chemical composition includes:

• Silica (SiO2): Generally makes up the majority, around 65-75%
• Alumina (Al2O3): Around 10-15%
• Potassium Oxide (K2O): Approximately 3-5%
• Sodium Oxide (Na2O): Roughly 3-5%
• Iron Oxide (Fe2O3): Typically 2-4%
• Calcium Oxide (CaO): About 1-3%
• Magnesium Oxide (MgO): Less than 1%
• Mineral Composition: Mainly consists of quartz, feldspar, and mica, which contribute to its color and durability.

Usage:

• Construction Material: Used in both residential and commercial buildings for flooring, countertops, and wall cladding.
• Monuments and Sculpture: Suitable for outdoor monuments due to its durability.
• Interior Design: Excellent for kitchen countertops, bathroom vanities, and table tops because of its aesthetic appeal and resistance to heat and staining.

Maintenance:

• Cleaning: Regular cleaning with mild, non-acidic detergents is recommended.
• Sealing: Periodic sealing is advised to maintain its appearance and prevent staining, particularly in high-usage areas like kitchens.
• Avoidance of Harsh Chemicals: Use of harsh chemicals and abrasive cleaners should be avoided to prevent damage.

Available Common Surface Finish Options:

• Polished: Provides a glossy, reflective surface that enhances the natural color and patterns.
• Honed: Offers a smooth, matte finish that is less reflective, providing a more subdued appearance.
• Flamed: Involves applying high heat to create a rougher finish, often used for exterior applications.
• Brushed: Imparts a textured finish that provides a slip-resistant surface, ideal for flooring.
• Bush-Hammered: Produces a heavily textured, rugged finish, providing excellent slip resistance and a distinctive aesthetic.

Gris Robledo Granite’s combination of aesthetic versatility, mechanical strength, and low maintenance requirements makes it a highly sought-after material in both modern and traditional architectural projects.

Test Result - Physical and Mechanical Characteristics

• Density: 2,660 kg/m³
• Compressive Strength: 210 MPa
• Flexural Strength (Mechanical): 16.8 MPa
• Water Absorption Coefficient: 0.1%
• Modulus of Elasticity: 0.02%
• Abrasion Resistance: 16 mm
• Impact Resistance: 50 cm