Official SGS Test Report: Flexible Stone Passes Flexibility Test with 200mm Mandrel
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Read the official SGS flexibility test report for our Flexible Stone. Tested under JG/T 311-2011, our material shows zero cracking at a 200mm bending radius, making it perfect for complex Facade Retrofit designs.
1. Report Overview
This article presents the official SGS test report (Report No. GZIN2509001820CM03-1_EN) evaluating the flexibility of our Flexible Stone. Conducted by SGS-CSTC Standards Technical Services Co., Ltd., the test confirms that our 2.5mm thick material can withstand significant bending without structural failure.
This outstanding flexibility is a core advantage in Flexible Stone Engineering, enabling architects and contractors to easily wrap complex geometries, columns, and irregular surfaces during Facade Retrofit and new construction projects.
2. Data Analysis: Why 200mm Mandrel Matters
According to the test results, a 250mm × 50mm × 2.5mm specimen of our Flexible Stone was tested around a 200 mm diameter mandrel. The result showed “No cracking occurred,” achieving a “Pass” conclusion according to the standard’s requirements.
Engineering Value for Facade Retrofit:
- Crack Resistance on Old Walls: During Facade Retrofit, existing walls often have minor cracks or uneven surfaces. The high flexibility of our material absorbs structural stress and thermal expansion, preventing the surface layer from cracking or peeling.
- Complex Geometry Wrapping: Unlike rigid ceramic tiles or natural stone that shatter under bending, Flexible Stone effortlessly bends to fit cylindrical columns, arches, and curved architectural features without the need for cutting or specialized edge treatments.
3. Test Methodology
The SGS evaluation was conducted strictly under the Chinese construction industry standard JG/T 311-2011 (Flexible Facing Tiles for External Walls), Section 6.9.
- Test Standard: JG/T 311-2011 Section 6.9
- Specimen Size: 250mm × 50mm × 2.5mm
- Test Condition: The specimen was bent around a 200 mm diameter mandrel.
- Standard Requirement: According to JG/T 311-2011 Table 2, no cracking shall occur when tested with a 200 mm diameter mandrel.
- Test Result: Pass (No cracking occurred).
Note: The test report explicitly states that it is intended for internal quality control and product research & development. For official bidding or compliance verification, the specific SGS report number (GZIN2509001820CM03-1_EN) should be referenced.
4. FAQ
Q1: What does the “200mm mandrel test” mean for the material?
A: It means that our Flexible Stone can be bent around a cylinder with a 200mm diameter (a bending radius of 100mm) without cracking or breaking. This proves the material’s excellent flexibility and its ability to conform to curved surfaces.
Q2: Can Flexible Stone be used on curved columns or arches?
A: Yes. Because it passes the flexibility test, Flexible Stone is highly suitable for wrapping cylindrical columns, curved walls, and arched facades. It eliminates the need for heavy machinery to cut and shape traditional stone or tiles on-site.
Q3: Why is flexibility critical for Facade Retrofit projects?
A: Old buildings often have uneven surfaces and micro-cracks. Rigid materials tend to fail or detach under slight movements. The flexibility of our Flexible Stone allows it to absorb thermal stress and bridge minor cracks, ensuring the longevity and safety of the Facade Retrofit.
Q4: Is this report valid for other thicknesses?
A: This specific test (Report No. GZIN2509001820CM03-1_EN) was conducted on a 2.5mm thick specimen. For technical data on other thicknesses, please contact our engineering team directly.