The culture stone's standard for stone veneer suppliers

JC / T 2087-2011 Building Decoration Art imitation natural surface stone
1 Scope
This standard specifies the terms and definitions of architectural decoration art stone with imitation natural surface, classification, naming and marking requirements, test methods, inspection rules, signs, packaging, transport and storage.
This standard applies to the cast molding finishes decorative material as the main raw material of Portland cement, lightweight aggregates.

2 normative references
The terms of the following documents by the standard reference in the provisions of this standard. Dated reference documents, all subsequent amendments (excluding corrections) or a modified version not apply to this standard. However, the latest versions of these files can be used to encourage the parties to reach an agreement by the standard whether. Those who are not dated reference documents, the latest versions apply to this standard.
GB / T 191 Packaging - Pictorial marking
GB / T 9966.1 natural decorative stone test methods - Part 1: dry, water-saturated, compression strength after freeze-thaw cycle test method
GB / T 9966.2 natural decorative stone test methods - Part 2: dry, water-saturated bending strength test method
GB / T 9966.3 natural decorative stone test methods - Part 3: bulk density, true density and true porosity, water absorption test methods
GB / T 18601 natural granite building block
GB / T 16259 color building materials artificial climate accelerated color aging test method
JC 830.1 of hanging decorative stone and its metal pendant, Part 1: dry hanging decorative stone

3 Requirements
3.1 Appearance Requirements
The culture stone's appearance should be consistent with the requirements in Table 1:
Table 1
Project requirements
The pore diameter of not more than 2mm, per square centimeter of ≤ 2
The defect length no more than 15mm, width not exceeding 15mm or area of not more than 180mm2 single block finishes ≤ 2
Crack is not allowed
Surface in accordance with the requirements of the boilerplate, looking overly basic natural background natural color, no noticeable fading (brush test available), a large area of the overall tone, without breaking
Bottom surface of the bottom of a rough surface or a groove
3.2 dimensional tolerances
3.2.1 Cultural Stone Specifications Dimensions tolerances shall comply with the provisions of Table 2.
Table 2 Unit: mm
Project Index
Sheet length ≤ 300 300 ~ 600 ≥ 600
Length ± 5.0 ± 10.0 negotiated by both parties to determine
Width ± 4.0 ± 7.0
3.2.2 the corner angle tolerance of ± 5 °.
3.2.3 paste culture surface irregular stone, size deviation negotiated by the supply and demand sides.
3.3 Performance Requirements
Culture stone performance indicators should be consistent with the requirements in Table 3
Table 3
Project Index
Indoor outdoor
Bulk density, kg / m? ≤ 1000 ≤ 1700
Water Absorption,% - ≤ 6 (to do waterproofing treatment)
Compression strength, MPa - ≥ 15
Flexural strength, Mpa - ≥ 4
Frost resistance,% - ≥ 80
Resistance to artificial weathering - The appearance of quality, the color did not change

4 test methods
4.1 Appearance
GB/T18601 standard test method cf standard samples and visual methods.
4.2 size deviation (rules apply to products)
4.2.1 products length and width: directly with a ruler to measure the length and width of the product.
4.2.2 Angle: 90 degrees or 135 degrees Sruare direct measurement of the the product interior angles angle.
4.3 Performance Requirements
4.3.1 The bulk density, water absorption
70mm cube specimens made in accordance with the sample material ratio, according to GB / T 9966.3 Standard Test Method.
4.3.2 compressive strength
70mm cube specimens made in accordance with the sample material ratio, as required under GB/T9966.1 test methods.
4.3.3 flexural strength
They made 200mm * 100mm * actual thickness rectangular specimen in accordance with the ratio of sample raw, the required test methods by GB/T9966.2.
4.3.4 frost resistance
350mm * 100mm * 30 rectangular specimens made in accordance with the sample material ratio, according to the provisions of the JC 830.1 test methods.
4.3.5 Resistance to artificial weathering
Ratio in accordance with the samples of raw materials made 200mm * 100mm * 20 rectangular specimens according to the provisions of GB / T 16259.

5 Inspection Rules
5.1 factory inspection--for stone veneer suppliers
Each batch of product should factory inspection, factory inspection items: appearance, size and angle of deviation.
5.2 The type of inspection
When should the following type test. Chapter III performance requirements of the type inspection items as standard technical indicators.
- stone veneer suppliers New long put into operation:
- Raw materials, processes are major changes, that may affect product quality;
- Discontinued for more than six months to resume production;
- Normal production, once every year;
- National quality supervision departments when requested.
5.3 Sampling and determination
Sampling and determination method are shown in Table 4.
Table 4: Block
Volume range of the number of samples the acceptance number (Ac) failed to determine the number (Re)
≤ 25 5 0 1
26-50812
51-901323
91-1502034
151-2803256
281-5005078
500-1200801011
1201-320012514 15
≥ 3201 200 21 22

6 signs, packaging, transportation, storage
6.1 logo
Should be marked with the product name on the product packaging, registered trademarks, model specifications, implementation of standards, quantity, batch number or date of manufacture, manufacturing plant name and address, packaging and storing signs to be "up" and "handle with care "sign and comply with the provisions of the GB/T191.
6.2 Packaging
The products varieties were packaging with product certification. Using carton packaging, enclosing the gasket. Can also be packaged according to the requirements of users. When the packaging (due to the special nature of culture stone shape, carton number allowed error of ± 3%), and there is leakage, the supplier should promptly notify the number of discrepancies.
6.3 Transportation
Transportation to do with light, light up. Means of transport should be clean, hygienic, non-polluting. Transport process should be moisture proof, anti-rain heap of high-level shall not exceed six layers, to prevent crushing.
6.4 Storage
Storage environment should be clean, dry, moisture-proof facilities. The product should be classified storage, clearly marked, gently, the stockpile should not be too high, and no more than five-layer stack layer, to prevent damage to the products and facilities.