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Dalian Granite

Dalian GraniteDalian GraniteDalian Granite
Dalian Granite

Granite

China

About

Item Details

Material Type:
Granite
Origin:
China (Liaoning Province)
Recommended Usage:
kitchen and bathroom countertop, wash basins, building stone, ornamental stone, stairs, interior, exterior wall and floor applications, mosaic, water-jet pattern, wall panels, table tops, balustrades, columns, wall and pool copings, pool pavers, fireplaces, window sills
Additional Names:
Dalian White Granite, Dalian Sea Wave Granite, in China stone market:大连花岗岩 (Dàlián Huāgāngyán)
Finished Surface:
Polished,Flamed,Bush Hammered,Tumbled,Brushed,Honed,Split,Machine Cut,Natural Surface,Sandblasted,Acid Washing,Combed,Leathered,Water Jet,Chiseled,Pickling

Testing

Water Absorption:
0.15 - 0.45 % by weight
Density:
2680 - 2710 kg/m³
Flexural Strength:
13 - 17 MPa
Compressive Strength:
150 - 190 MPa

Description

Dalian Granite is a natural granite quarried in Liaoning Province, China, particularly associated with the Dalian region. It features a classic light-grey to white background heavily interspersed with dark black, charcoal and grey mineral grains. Its coarse-grained crystalline structure and irregular distribution of light and dark minerals create a distinctive speckled, cloudy and mottled appearance.

General Characteristics

  • Base Color: Light grey to white
  • Secondary Colors: Black, charcoal and medium grey
  • Pattern: Speckled, mottled and irregular
  • Grain: Coarse-grained
  • Texture: Crystalline and granular
  • Appearance: Classic, natural and highly textured
  • Variation: Medium
  • Recommended Finishes: Polished, honed, flamed, bush-hammered, sandblasted, brushed and machine-cut

Texture

Dalian Granite has a coarse-grained crystalline texture characteristic of many granitic rocks. Individual mineral grains can be visible across the surface, creating a naturally granular appearance. The uneven distribution of dark and light minerals gives the material a slightly cloudy or mottled visual effect, while the coarse grain provides additional depth under different lighting conditions.

Pattern & Mineral Structure

The stone is dominated by a light grey to white matrix with contrasting dark mineral grains. Light grey and white minerals form the background. Black and charcoal grains provide strong contrast. Medium-grey minerals create intermediate tonal transitions. Mineral grains are distributed irregularly rather than forming continuous veins. Large surfaces display a naturally speckled and granular appearance. Unlike strongly veined marble, Dalian Granite has a consistent crystalline pattern without major flowing veins, making it suitable for projects requiring a traditional granite aesthetic.

Physical & Mechanical Properties

The following values are indicative ranges for comparable Liaoning Chinese granites and should not be treated as certified laboratory results for every Dalian Granite quarry block.

  • Apparent Density: 2,680–2,710 kg/m³
  • Water Absorption: 0.15–0.45% by weight
  • Open Porosity: 0.2–1.5%
  • Compressive Strength: 150–190 MPa
  • Flexural Strength: 13–17 MPa
  • Mohs Hardness: Approx. 6–7
  • Abrasion Resistance: High
  • Freeze-Thaw ResistanceGenerally suitable, subject to project-specific testing

Actual performance should be confirmed through laboratory testing of representative samples from the selected quarry.

Mineral Composition - Mineral, Approx. % by Weight

  • Plagioclase Feldspar: 35–50%
  • Quartz: 20–30%
  • K-Feldspar: 10–20%
  • Biotite: 5–12%
  • Hornblende / Amphibole: 2–8%
  • Other Accessory Minerals: <3%

The precise mineral proportions depend on the geological formation and quarry location.

Chemical Composition - Chemical Component, Approx. % by Weight

  • SiO₂: 60–72%
  • Al₂O₃: 13–18%
  • Fe₂O₃ + FeO: 1–5%
  • CaO: 2–6%
  • Na₂O: 3–5%
  • K₂O: 2–5%
  • MgO0.5–3%
  • TiO₂: 0.1–1%
  • Other Oxides: <2%

These values are indicative and should be replaced with certified chemical analysis when available.

Recommended Applications

Dalian Granite is suitable for a wide range of interior and exterior applications:

Building façades, Exterior wall cladding, Interior wall cladding, Flooring, Exterior paving, Sidewalks, Steps and staircases, Window sills, Door thresholds, Countertops, Kitchen islands, Bathroom vanities, Fireplace surrounds, Columns, Plinths, Landscaping, Garden walls, Monumental works, Memorials, Tombstones, Cemetery applications, Commercial and public buildings, Hotel and hospitality projects.

Its high hardness and resistance to abrasion make it particularly suitable for high-traffic flooring, paving and exterior applications.

Maintenance

Dalian Granite is a durable and relatively low-maintenance natural stone.

  • Clean regularly with a pH-neutral stone cleaner.
  • Avoid prolonged exposure to strong acids or aggressive chemicals.
  • Avoid abrasive powders that can affect polished surfaces.
  • Wipe spills promptly on countertops.
  • Apply a suitable penetrating sealer where required.
  • Periodically inspect the sealer, particularly in kitchens and bathrooms.
  • Outdoor surfaces should be cleaned periodically to remove dirt, algae and environmental deposits.
  • For polished surfaces, use non-abrasive cleaning materials.

FAQ

Can Dalian Granite be used in a steam room? How does moisture and heat affect the tile surface?

Dalian Granite can be used in a steam room, but there are several important considerations to ensure its suitability and longevity in such an environment. Granite is a natural stone renowned for its durability and resistance to heat, making it generally a good choice for areas exposed to high temperatures. However, the combination of moisture and heat in a steam room can have specific impacts on the surface. 1. **Moisture Resistance**: Granite is less porous compared to other natural stones, which makes it relatively resistant to moisture. Nonetheless, its porosity can vary, and some granites may absorb water over time if not properly sealed. To protect granite in a steam room, it is essential to apply a high-quality, penetrating sealer that can prevent water absorption and reduce the risk of staining. 2. **Heat Resistance**: Granite can handle high temperatures without sustaining damage, which is why it’s commonly used for kitchen countertops. The heat in a steam room should not adversely affect the granite itself. 3. **Thermal Expansion**: Variations in temperature can cause expansion and contraction in materials. While granite is quite stable, in extreme cases, temperature fluctuations could potentially lead to cracking if the tile was not installed with appropriate expansion joints. 4. **Surface Appearance and Maintenance**: Constant exposure to heat and moisture can affect the appearance of the granite surface over time. It may become dull without regular cleaning and maintenance. Regularly wiping down surfaces and re-applying sealant as needed will help maintain its appearance. 5. **Slip Resistance**: Polished granite can become slippery when wet, posing a risk in environments like steam rooms. Honed or textured finishes might be more suitable to provide additional slip resistance. Overall, if proper precautions are taken concerning sealing, installation, and maintenance, Dalian Granite can be a functional and aesthetically pleasing choice for a steam room. Consider consulting with a professional installer or supplier to ensure all specific needs and concerns are addressed before installation.

Can I use Dalian Granite as a fireplace hearth? Is it resistant to heat?

Yes, Dalian Granite can generally be used as a fireplace hearth. Granite is a popular material for hearths because it is heat-resistant and can handle the high temperatures produced by a fireplace. Additionally, granite is durable and scratch-resistant, which makes it a practical choice for areas subject to heat and foot traffic. However, make sure to verify that the specific type of Dalian Granite you have is suitable for use near high temperatures. While granite is typically heat-resistant, some variations might have differing properties due to their unique mineral compositions. Consulting with the supplier or a professional installer will help ensure that your particular type of granite is appropriate for use as a fireplace hearth.

Is 3cm thick Dalian Granite durable enough for use as walkway pavers?

Yes, 3cm thick Dalian Granite can be a suitable choice for walkway pavers. Granite is known for its durability, strength, and resistance to weathering and wear, making it a popular choice for outdoor applications like walkways, driveways, and patios. A thickness of 3cm (approximately 1.18 inches) should provide adequate strength for pedestrian traffic. However, its important to ensure that the substrate or base is properly prepared to support the granite and prevent shifting or cracking over time. Additionally, proper sealing can help maintain the appearance and longevity of the granite by protecting it from stains and moisture.

Can honed finish surface Dalian Granite be used for pool coping?

Yes, honed finish Dalian Granite can be used for pool coping. Granite is known for its durability, resistance to weathering, and aesthetic appeal, making it a suitable choice for outdoor applications such as pool coping. A honed finish provides a smooth, matte surface, which can enhance grip and reduce the risk of slipping, important considerations for pool areas. However, its essential to ensure proper sealing and maintenance to prevent water absorption and potential staining. Always consult with a professional to ensure the suitability of the specific granite and finish for your pool environment, considering factors like local climate and usage.

How can I repair the scratched surface of the Dalian Granite countertop?

Repairing a scratched Dalian Granite countertop involves a few steps. Here’s a guide to help you address minor to moderate scratches: 1. **Evaluate the Scratch:** - Determine the depth and severity of the scratches. Surface scratches can often be repaired at home, but deeper scratches might require professional assistance. 2. **Clean the Countertop:** - Thoroughly clean the area with a mild dish soap and warm water. This will remove any dirt and debris, preventing further scratching during the repair process. Dry the surface with a soft cloth. 3. **Identifying the Type of Polish:** - If you know whether your granite is sealed with a specific polish, it will be helpful for applying the correct substance during the repair. 4. **Use a Stone Cleaner:** - Clean the scratched area with a specialized stone cleaner to remove oils or residue that soap might not cleanse away. 5. **Buffing with Stone Polish:** - For minor scratches, apply a small amount of stone polish or granite polishing powder to the scratched area. Use a soft cloth or a buffing pad. Rub gently in a circular motion. - If polishing powder is used, dampen the surface slightly, sprinkle the powder, and buff with a damp cloth or pad. 6. **Use of Sanding Pads:** - For moderate scratches, you might need to use a diamond polishing sanding pad, ranging from 100 to 600 grit for larger scratches. - Start with the finest grit that is appropriate for the scratch, buffing lightly in a circular pattern. Gradually move to a finer grit to blend the scratch. Keep the pad damp to avoid overheating the stone. 7. **Rinse and Dry:** - After buffing, rinse the area with clean water to remove any residue from polishing compounds or sanding bits. Dry the area thoroughly. 8. **Apply Granite Sealer:** - Reapply a granite sealer to the repaired area. Apply according to the directions on the sealers packaging. Allow it to soak in and dry completely, as this will help protect the surface and restore shine. 9. **Professional Refinishing (if needed):** - If the scratches are not eliminated or if there is a risk of damaging the surface further, consider consulting or hiring a professional. They will have specialized tools and compounds to restore the surface effectively. Remember to always test products and methods in an inconspicuous area before applying them to ensure compatibility and avoid further damage. Regular maintenance and care will help minimize scratches in the future.

Do fruit juices stain the surface of Dalian Granite kitchen countertop?

Dalian Granite is known for being a durable and relatively stain-resistant material commonly used for kitchen countertops. However, like all natural stones, it is porous to some degree and can be susceptible to staining if not properly sealed and maintained. Fruit juices, especially those that are acidic or have strong pigments, like grape, cranberry, or beet juice, can potentially stain granite surfaces if left to sit for extended periods. To minimize the risk of staining: 1. **Seal the Granite**: Ensure that your granite countertop is properly sealed. A high-quality sealant will provide a protective barrier against spills and stains. Reseal the countertop as recommended by the manufacturer or installer. 2. **Clean Spills Promptly**: Wipe up spills immediately to prevent them from soaking into the stone. Use a mild detergent and warm water to clean the surface. 3. **Use Cutting Boards and Coasters**: Prevent direct contact with acidic or pigmented substances by using cutting boards for food preparation and coasters for glasses. 4. **Regular Maintenance**: Keep your countertop clean and inspect it regularly for any damage to the sealant. By taking these precautions, you can help maintain the appearance and integrity of your Dalian Granite countertop and reduce the risk of staining from fruit juices or other substances.

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