Specialty Aggregates

Technical Data

Kafka Specialty Aggregate Technical Data

Commitment to Excellence

There are many factors that play a role in creating the specialty aggregates, natural thin stone veneer, and other products that Kafka Granite manufactures. Our decades of experience in the industry have made it clear to us that architects, designers, stonemasons, and others need high-quality specialty aggregates and masonry units that will hold up under stress and against natural forces. Kafka performs various testing methods on their materials to ensure the product is suited to your project specifications. To further demonstrate our commitment to transparency and quality, all test data is available to our customers.

When you purchase specialty aggregates and other natural stone products from Kafka Granite, you can rest easy knowing the materials you receive will be of the highest quality.

Specific Gravity

Kafka Granite adheres to ASTM material specifications for our stone products. Samples of our specialty aggregates are sent out for a number of tests, including ASTM C127: Standard Test Method for Specific Gravity and Absorption of Coarse Aggregate. This particular assessment determines the density of a given aggregate. This data can help determine whether the crushed stone is appropriate for a specific application.

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ASTM C127 also determines the absorption of a given aggregate. Different absorption levels determine how well a specific type of stone will withstand weathering and structural stress, and, by extension, how a product can be used. It’s essential that the qualities of a stone match the needs of the application. Absorption capacity is particularly important in natural stone products that will be exposed to the elements and undergo the freeze-thaw cycle.

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Mohs Hardness

The Mohs scale of mineral hardness is used to measure the scratch resistance of a material, and also aid in identifying minerals. Measurements range from 1 to 10, with 1 indicating the softest material and 10 the hardest. Depending on what the aggregate is being used for, there may be an industry specification or product standard that states how hard the stone needs to be. For example, an abrasive quality allows harder stone products to stand up to harsh environments, or allows softer stone products to polish more effectively.

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Sieve Analysis

The process of a sieve analysis is used to determine an aggregate’s gradation, or the distribution of stone particles by size, within a given sample. The sieve analysis is especially important to evaluate the performance of aggregates for their intended uses, and can be critical in the strength of the finished product, compaction of the aggregate, or the visual aesthetic. A sieve analysis is also helpful as a measure of quality control and consistency when crushing. Kafka produces a large range of aggregate sizes to meet nearly any size specification.

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Specialty Aggregate Technical Data

American Heritage Granite2.740.9%5.5-6 Test Report
Antique Rose Marble2.790.7%4.5-5 Test Report
Aspen Glitter2.680.7%7 Test Report
Autumn Blend Marble2.821.9%5-5.5 Test Report
Beige Blend Marble2.850.6%4-4.5 Test Report
Birchwood Pebbles2.831.1%5-5.5 Test Report
Black Diamond Granite3.510.5%6-6.5 Test Report
Blue Mahogany Granite2.690.6%7-7.5 Test Report
Botticino Marble2.771.7%3-3.5 Test Report
Buff River Tan Pebbles2.752.0%4.5-5.5 Test Report
Burnt Sienna Marble2.793.0%5 Test Report
Butterscotch Pebbles2.622.6%7-7.5 Test Report
Cajun Spice Granite2.780.8%7-7.5 Test Report
Caramel Quartzite2.582.0%7.5 Test Report
Cherry Creek Pebbles2.771.4%5-6 Test Report
Chocolate Brown Granite2.863.2%3-4 Test Report
Colonial Red Granite2.640.4%7.5 Test Report
Crystal White Quartz2.660.4%7.5 Test Report
Dynamite Orange Granite2.650.7%7-7.5 Test Report
Evergreen Granite2.960.5%3 Test Report
Galaxy Glitter2.760.9%6.5-7 Test Report
Golden Cream Marble2.805.1%3-3.5 Test Report
Gun Metal Marble2.860.4%3.5 Test Report
Imperial Gray Granite2.670.5%7-7.5 Test Report
Jade Granite2.910.7%7 Test Report
Jett Black Granite3.080.4%6.5 Test Report
Mauve Granite2.640.6%7 Test Report
Midnight Blue Granite2.880.4%7-7.5 Test Report
Mint Glitter2.741.6%6.5-7 Test Report
Misty Gray Marble2.880.8%2.5-3 Test Report
Patina Granite2.680.7%7 Test Report
Platinum Granite2.710.5%7 Test Report
Polar White Marble2.780.7%3.5 Test Report
Recycled Copper Slag3.040.3%6.5-7 Test Report
Recycled Mirror
Recycled Porcelain2.461.8%7.5 Test Report
Recycled Smoked Glass
Red Cedar Granite2.602.0%6.5 Test Report
Rosa Glitter2.681.0%7.5 Test Report
Rose Pink Quartz2.650.4%7.5 Test Report
Rustic Granite2.581.5%6.5-7 Test Report
Salt & Pepper Granite2.721.0%6.5-7 Test Report
Sierra Black Granite2.760.6%7-7.5 Test Report
Snow White Granite2.661.1%7-7.5 Test Report
Starlight Black Granite2.940.5%7 Test Report
Sterling Quartz2.690.7%6.5-7 Test Report
Sugar & Spice Granite2.710.7%7-7.5 Test Report
Sunset Pink Granite2.640.6%7-7.5 Test Report
Super White Marble2.750.5%4.5-5 Test Report
Turquoise Marble2.831.6%3-3.5 Test Report
Twilight Black Granite2.940.5%6.5-7 Test Report
Violetta Quartzite2.660.5%7.5 Test Report
Wineberry Granite2.681.5%7 Test Report

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