Candi Jogja Black Basalt

Candi Jogja Black Basalt is a unique natural stone quarried from the Merapi Mountain in Central Java, Indonesia. Its dark grey to solid black color, which intensifies when wet, makes it a popular choice for architectural and interior design applications. It features a distinctive porous, vesicular texture with tiny cavity pores, adding to its aesthetic and functional qualities.

Physical and Mechanical Properties:

• Water Absorption: Typically low, but the exact percentage depends on the density and porosity of specific samples.
• Density: Approximately 2.75-2.85 g/cm³. This reflects its solid and robust nature.
• Flexural Strength: Ranges from 8 to 12 MPa, indicating good resistance to bending forces.
• Compressive Strength: Between 160 to 180 MPa, demonstrating its ability to withstand heavy loads.
• Hardness: Generally falls between 6 and 7 on the Mohs scale, indicating good scratch resistance.
• Porosity: The porous nature is characteristic but typically comprises a minimal percentage that does not significantly impact performance.
• Slip Resistance: Offers good slip resistance when finished with a natural or honed surface, making it ideal for flooring and outdoor applications.

Chemical and Mineral Composition (% by weight):

• Silica (SiO2): 45-52% - contributes to the stone's hardness and durability.
• Alumina (Al2O3): 14-18% - aids in the stone's strength and resistance to weathering.
• Iron Oxides (Fe2O3): 8-12% - responsible for the characteristic dark color.
• Magnesium Oxide (MgO): 5-8% - enhances the stone’s toughness.
• Calcium Oxide (CaO): 6-12% - adds to the stone's durability.
• Sodium Oxide (Na2O) and Potassium Oxide (K2O): 2-5% - provide minor influence on the physical properties.
• Titanium Dioxide (TiO2): Approximately 1-2% - contributes slightly to the coloration.
• Other Trace Elements: Miscellaneous amounts of other trace minerals.

Usage:

• Indoor Applications: Flooring, wall cladding, countertops, and decorative elements. The dark color and unique texture make it a sophisticated choice for contemporary designs.
• Outdoor Applications: Paving, pool coping, and exterior wall cladding. It’s particularly valued for its weather resistance and slip-resistant properties.
• Landscaping: Can be used in garden paths, decorative stones, and as an accent in outdoor features.

Maintenance:

• Regular Cleaning: Clean regularly with pH-neutral cleaners to maintain its appearance.
• Sealing: Sealing may be required to enhance stain resistance, especially in high-traffic areas or where the stone is used as a countertop.
• Avoid Abrasives: Avoid using harsh chemicals or abrasive scrubbers to prevent surface damage.

Cutting Sizes (cm):

• Standard tiles: 30x30, 30x60, 60x60, and custom sizes available on request.
• Thickness typically ranges from 1 cm to 3 cm, depending on application requirements.

Available Common Surface Finish Options:

• Honed: A smooth, matte finish that is ideal for interior applications.
• Polished: Gives a glossy surface, although less common due to the stone's natural texture.
• Brushed: Retains some of the natural texture while providing a slightly more structured surface.
• Natural Split: Emphasizes the stone’s inherent roughness and texture, great for exterior applications.
• Sandblasted: A textured finish that enhances slip resistance, suitable for outdoor applications.

Candi Jogja Black Basalt is a versatile and aesthetically appealing material suitable for a variety of architectural projects, from modern minimalist designs to more traditional applications. Always consult with a professional to determine the best finish and size for the specific use to ensure optimal performance and longevity.