Jurassic stone is a popular marbled limestone that has been used for decades around the world as flooring in both private villas and high-traffic areas such as airports, shopping centers, and administrative complexes. The stone is extracted in northern Bavaria, Germany. To use the natural material as flooring in areas with high visitor traffic, it is necessary to conduct tests on the following parameters of the stone.
🔍Room of the Reichstag building, Berlin, Germany (8 years of operation) Jura Travertin / Jura Rahmweiss vein cut, Jura Gold, Jura Beige
Jurassic stone must be sourced exclusively by those enterprises that can present at least certificates of conducted tests. To establish the quality of Jurassic limestone as a flooring material, numerous tests should be carried out.
Tests for Jurassic stone
Determination of density in dry condition (DIN 52102)
The ratio of the substance of the stone to the voids and the volumes to the voids.
Definition of hygroscopicity (DIN 52103)
A dry stone absorbs water to a depth of 1 cm in 1 minute.
Hygroscopicity is determined by the formula: (weight in wet condition/weight in dry condition) / area of stone contact.
Wear resistance testing using a grinding wheel according to the Böhm method, abrasion testing (DIN 52108)
Wear in volume fractions (cm3) on a 50 cm2 grinding surface.
Bending strength test (DIN 52112)
How much can a stone, which is supported on two points, be bent when a weight is placed in the center of the sample, and how long will it take to break?
Resistance test (DIN 52105)
Pressure should be applied to the stone that is being set on the pressure plate until the stone cracks.
Slip resistance property test (DIN 51130)
According to DIN 51130, the slip resistance property of all types of floor coverings is determined on a "sloped level": the person conducting the test walks in special shoes with a straight posture back and forth on the test floor covering. During this process, the tester leans at an angle from a state of balance until complete loss of balance. Thus, the accepted angle on the surface is marked with a lubricant. The average accepted angle obtained serves as a measure of the slip angle.
The determination of slip properties according to DIN 51130 is carried out in laboratory conditions only for new factory samples of the coating. There is no data on the properties of the tested flooring for everyday use. Since over the past few years, the tests themselves and the methods of conducting them have been improved to monitor the quality of the flooring not only in the laboratory but also at the site of material application.
The angle of inclination (slope) from 3 to 10° (R9)
R9 – should be used in commercial premises, on staircases, in corridors, halls (of train stations), and in guest reception rooms.
🔍Airport lounge Zurich, Switzerland (40 years of operation) Jura Blue, Jura Polar-Blue, Jura Grey.
Average technical characteristics of Jurassic marble
Density in dry condition: about 2.47 g/cm3
Wear resistance: about 14-18 cm3/50 cm2
Bending strength: about 10.1-14.3 N/mm2
Resistance test: about 150 N/mm2
🔍Shopping center Blue Water, Dartford-Kent, England (18 years of operation), Jura Beige, Jura Gold, Jura Travertin / Jura Rahmweiss vein cut
The technical specifications are provided for each layer of Jurassic marble extracted from the supplier's quarry.
The most important tests for assessing the quality of Jurassic stone are the wear resistance test (abrasion resistance) and the bending test. All tests are conducted in laboratory conditions on selected samples for testing, and the data is compared with other data for different types of stone. The interpretation of individual indicators may vary.
🔍King Fahad Medical City Hospital Complex, Riyadh, Saudi Arabia (22 years of operation) Jura Beige
In conclusion, first of all, regarding wear resistance indicators, a visual inspection should also be conducted. This way, a fairly quick result can be obtained covering many characteristics through visual examination and it can be determined which type of stone, under the same conditions, has the best characteristics and can withstand the load for several years.
Jurassic limestone from Germany
JuraLimestone®Jura Cream
🔍JuraLimestone®Jura Travertin
🔍JuraLimestone®Jura Blue
🔍Full catalog of Jurassic limestone from Germany »