Preface
The degree of conformity between this standard and ASTM C 616-03 "Standard Specification for Sandstone" is non-equivalent.
This standard is proposed by the China Building Materials Federation.
This standard is under the control of the National Stone Standardization Technical Committee (SAC/TC 460).
Responsible for the drafting of this standard: Sinoma Intraocular Lens Research Institute (National Stone Quality Supervision and Inspection Center), Beijing Sinoma Intraocular Lens Co., Ltd.
This standard participated in the drafting unit: Global Stone (Dongguan) Co., Ltd.
The main drafters of this standard: Chen Junying, Zhou Junxing, Zhong Wenbo, Zhao Hongjie.
This standard is the first time it has been formulated.
1 Scope
This standard specifies the terms and definitions, classification, grades and markings, requirements, test methods, inspection rules, markings, packaging, transportation and storage of natural sandstone building slabs (hereinafter referred to as slabs) products.
This standard applies to natural sandstone slabs for architectural decoration. Natural sandstone slabs for other purposes can also be used as references
2 Normative references
The clauses in the following documents become the clauses of this standard by reference in this standard. All subsequent revisions (excluding errata) or revisions of dated references are not applicable to this standard, however, parties who have reached an agreement under this standard are encouraged to investigate the possibility of using the latest versions of these documents. The most recent version of an undated reference applies to this standard.
GB/T 191 Pictorial Signs for Packaging, Storage and Transportation
GB/T 1182 Product Geometrical Technical Specification (GPS) Annotation of geometric tolerances, shapes, orientations, positions, and runout tolerances
GB/T 1800.3 Limits and mating basics – Part 3: Numerical tables of standard tolerances and basic deviations
GB/T 1801 Limits and fits Selection of tolerance zones and fits
GB/T 2828.1 Procedures for counting sampling tests Part 1: Batch-by-batch inspection sampling plans retrieved by Receiving Quality Limit (AQL).
GB/T 9966.1 Test methods for natural facing stones – Part 1: Test methods for compressive strength after drying, water saturation and freeze-thaw cycles
GB/T 9966.2 Test methods for natural facing stones – Part 2: Test methods for bending strength of drying and water saturation
GB/T 9966.3 Test methods for natural facing stones Part 3: Test methods for bulk density, true density, true porosity, and water absorption
GB/T 13890 Terminology for natural stone
GB/T 17670 Unified number of natural stones
GB/T 18601-2009 Natural granite building panels
GB/T 19766-2005 Natural marble building panels
The clauses in the following documents become the clauses of this standard by reference in this standard. All subsequent revisions (excluding errata) or revisions of dated references are not applicable to this standard, however, parties who have reached an agreement under this standard are encouraged to investigate the possibility of using the latest versions of these documents. The most recent version of an undated reference applies to this standard.
GB/T 191 Pictorial Signs for Packaging, Storage and Transportation
GB/T 1182 Product Geometrical Technical Specification (GPS) Annotation of geometric tolerances, shapes, orientations, positions, and runout tolerances
GB/T 1800.3 Limits and mating basics – Part 3: Numerical tables of standard tolerances and basic deviations
GB/T 1801 Limits and fits Selection of tolerance zones and fits
GB/T 2828.1 Procedures for counting sampling tests Part 1: Batch-by-batch inspection sampling plans retrieved by Receiving Quality Limit (AQL).
GB/T 9966.1 Test methods for natural facing stones – Part 1: Test methods for compressive strength after drying, water saturation and freeze-thaw cycles
GB/T 9966.2 Test methods for natural facing stones – Part 2: Test methods for bending strength of drying and water saturation
GB/T 9966.3 Test methods for natural facing stones Part 3: Test methods for bulk density, true density, true porosity, and water absorption
GB/T 13890 Terminology for natural stone
GB/T 17670 Unified number of natural stones
GB/T 18601-2009 Natural granite building panels
GB/T 19766-2005 Natural marble building panels
3 Terms and Definitions
The terms and definitions established by GB/T 1182 and GB/T 13890 are applicable to this standard.
4 Product Classification
4.1 Classification
4.1.1 According to the type of mineral composition, it is divided into:
a) Miscellaneous sandstone: quartz content 50%~90%;
b) Quartz sandstone: quartz content greater than 90%;
c) Quartzite: metamorphosed quartz sandstone.
4.1.2 According to the shape, it is divided into:
a) Wool board (MB);
b) Plain Plate (PX);
c) Arc plate (HM);
d) Special-shaped plate (YX).
4.2 Grades
According to the processing and appearance quality, it is divided into:
a) According to the thickness deviation, flatness tolerance, appearance quality, etc., the wool plate is divided into three grades: excellent product (A), first-class product (B) and qualified product (C);
b) According to the specification size deviation, flatness tolerance, angle tolerance and appearance quality, the plate is divided into three grades: excellent product (A), first-class product (B) and qualified product (C);
c) The arc plate is divided into three grades: excellent product (A), first-class product (B) and qualified product (C) according to the specification size deviation, straightness tolerance, line profile tolerance and appearance quality.
4.3 Marking
4.3.1 Name: The name or number specified in GB/T 17670 shall be adopted.
4.3.2 Marking order: name, category, specification size, grade, standard number.
4.3.3 Examples: Examples of 600mm×600mm×20mm, ordinary and high-quality plates processed from Sichuan red sandstone blocks are as follows:
Marking: Sichuan red sandstone (Q5193) PX600×600×20A GB/T 23452-2009
5 Requests
5.1 General Requirements
5.1.1 The rock and mineral structure of natural sandstone building slabs shall conform to the definition of commercial sandstone.
5.1.2 The size series of the specification plate is shown in Table 1, and the specifications and dimensions of the arc plate, special-shaped plate and special requirements of the general type plate shall be determined by the supply and demand parties through negotiation.
The unit is mm
5.1.1 The rock and mineral structure of natural sandstone building slabs shall conform to the definition of commercial sandstone.
5.1.2 The size series of the specification plate is shown in Table 1, and the specifications and dimensions of the arc plate, special-shaped plate and special requirements of the general type plate shall be determined by the supply and demand parties through negotiation.
5.2 Processing Quality
5.2.1 The flatness tolerance and thickness deviation of the wool board shall be in accordance with the provisions of Table 2.
5.2.2 The allowable deviation of the specification and size of the general profile plate shall be in accordance with the provisions of Table 3.
Table 2 Units are millimeters
Table 3 Units are millimeters
5.2.3 The minimum wall thickness of the arc plate shall not be less than 20mm, and the allowable deviation of the specification size is shown in Table 4. The names of each part of the arc plate are shown in Figure 1.
Fig.1. Name of arc plate
Table 4 Units are millimeters
5.2.4 The allowable tolerance of the flatness of the general plate is shown in Table 5.
5.2.5 The allowable tolerance of the straightness and line profile of the arc plate is shown in Table 6.
5.2.6 The allowable tolerance of the angle of the general profile plate is shown in Table 7.
5.2.7 Allowable tolerance of the end face angle of the arc plate: 0.40mm for the excellent product, 0.60mm for the first class, and 0.80mm for the qualified product.
5.2.8 The angle between the front and side of the general board seam plate shall not be greater than 90°.
5.2.9 圆弧板侧面角α（见图5）应不小于90°。
5.2.10 The surface treatment of the plate shall be determined by the supplier and the buyer through negotiation.
Table 5 Units are millimeters
Table 6 Units are millimeters
Table 7 Units are millimeters
5.3 Appearance Quality
5.3.1 The color tone of the same batch of plates should be basically harmonized, and the pattern should be basically the same.
5.3.2 The appearance defects on the front side of the plate shall be in accordance with the provisions of Table 8.
Table 8
5.3.3 The plate is allowed to be bonded and repaired, and the decorative effect of the plate should not be affected after bonding and repairing, nor should the physical properties be reduced.
5.4 Physical Properties
The physical properties of natural sandstone building slabs shall comply with the provisions of Table 9. If the project has special requirements for the physical properties of natural sandstone building slabs and the project, it shall be implemented according to the requirements of the project.
Table 9
6 Test Methods
6.1 Rock Minerals
The test method is carried out according to the test method in Appendix A of GB/T 18601-2009.
6.1 Rock Minerals
The test method is carried out according to the test method in Appendix A of GB/T 18601-2009.
6.2 Processing Quality
6.2.1 Woolen Plates
6.2.1.1 Flatness
The 1000mm steel flat ruler with a flatness tolerance of 0.1mm is naturally attached to the two diagonals at 15mm away from the edge of the plate and the plane to be inspected, and the gap between the ruler surface and the plate surface is measured with a feeler gauge. When the length of the side to be inspected or the length of the diagonal is greater than 1000mm, the steel flat ruler is used to detect along the side length and the diagonal section, and the overlapping position is not less than one-third of the length of the steel flat ruler. The flatness tolerance of the woolly plate is expressed in terms of the measurement of the maximum clearance, and the measured value is accurate to 0.05mm.
6.2.1.2 Thickness
Measure the thickness of the glazing plate with a vernier caliper or a measuring instrument that can meet the accuracy requirements, and measure the midpoint of the 4 sides (see Figure 3). The maximum and minimum values of the deviation between the measured value and the nominal value are used to represent the dimensional deviation of the thickness of the woolly plate, and the measured value is accurate to 0.1mm.
6.2.2 Specifications and dimensions of general type plates
Measure the length, width, and thickness of the plate with vernier calipers or measuring instruments that can meet the requirements of measurement accuracy. The length and width are measured in the three parts of the plate (see Fig. 2), and the thickness is measured at the midpoint of the four sides (see Fig. 3). The maximum and minimum values of the deviation between the measured value and the nominal value are used to express the dimensional deviation of length, width, and thickness, respectively, and the measured value is accurate to 0.1 mm.
Fig.2. Measurement position of plate specification and size
1,2,3 - length measuring line;
1', 2', 3' – width measurement line.
1,2,3,4 – thickness measuring line.
Fig.3. Position of plate thickness measurement
1,2,3 – height and straightness measurement lines;
1', 2', 3' - line profile measurement line.
Fig.4. Measuring position of arc plate
6.2.3 Specifications and dimensions of arc plates
Use vernier calipers or measuring instruments that can meet the requirements of measurement accuracy to measure the chord length, height and maximum and minimum wall thickness of the arc plate. The chord length is measured at both end faces of the arc plate (see Fig. 1), the wall thickness is measured at the end face and side of the arc plate (see Fig. 1), and the height of the arc plate is measured as shown in Fig. 4. The maximum and minimum values of the deviation between the measured value and the nominal value are used to represent the dimensional deviation of chord length, height, and wall thickness, respectively, and the measured value is accurate to 0.1 mm.
6.2.4 Flatness of the general profile
The 1000mm steel flat ruler with a flatness tolerance of 0.1mm is pasted on the two diagonals of 10mm from the edge of the board and the plane to be inspected, and the gap between the ruler surface and the plate surface is measured with a feeler gauge. When the length of the side and diagonal of the inspected surface is greater than 1000mm, the steel flat ruler is used to detect along the perimeter and diagonal section.
The flatness tolerance of the sheet is expressed in terms of the measured value of the maximum clearance, and the measured value is accurate to 0.05 mm.
6.2.5 Arc plates
6.2.5.1 Straightness of arc plate
The 1000mm steel flat ruler with a flatness tolerance of 0.1mm is pasted on the arc surface along the direction of the arc plate bus, and the gap between the ruler surface and the plate surface is measured with a feeler gauge, and the measurement position is shown in Figure 4. When the height of the arc plate to be inspected is greater than 1000mm, it is measured in sections along the bus bar with a steel flat ruler.
The straightness tolerance of the arc plate is expressed in the measured value of the maximum clearance, and the measured value is accurate to 0.05mm.
6.2.5.2 Arc plate line contour
According to the provisions of GB/T 1800.3 and GB/T 1801, the arc die with dimensional accuracy of JS7 (js7) is used to attach to the arc surface to be inspected, and the gap between the die and the arc surface is measured with a feeler gauge, and the measurement position is shown in Figure 4.
The linear profile tolerance of the arc plate is expressed in the measured value of the maximum clearance, and the measured value is accurate to 0.05mm.
6.2.6 Angle of the general profile
It is detected by a 90° steel angle ruler with a perpendicularity tolerance of 0.13mm and an edge length of 500mm ×400mm at the inner corner. Place the short side of the ruler against the short side of the plate, and the long side against the long side of the plate, and measure the maximum gap between the long side of the plate and the long side of the corner ruler with a feeler gauge. Measure the four corners of the plate using the above method.
The angular tolerance of the sheet is expressed as a measurement of the maximum clearance, and the measured value is accurate to 0.05 mm.
6.2.7 Angle of the end face of the arc plate
It is detected by a 90° steel angle ruler with a perpendicularity tolerance of 0.13mm and an edge length of 500mm ×400mm at the inner corner. Place the short side of the corner ruler close to the end face of the arc plate, use the long side of the angle ruler to stick to the edge of the arc plate, and measure the maximum gap between the edge of the arc plate and the long side of the corner ruler with a feeler gauge. Measure the four corners of the arc plate using the above method.
The angular tolerance of the arc plate is expressed in the measured value of the maximum clearance, and the measured value is accurate to 0.05 mm.
6.2.8 Angle between front and side
With a 90° steel angle ruler with a perpendicularity tolerance of 0.13mm and a length of 500mm ×400mm at the inner corner, the short side of the corner ruler is close to the decorative surface, and the long side of the corner ruler is attached to the side, and the position of the gap is observed to determine the size of the angle.
6.2.9 Arc plate α angle
The arc die is attached to the decorative surface of the arc plate and the radial scale extension line on it intersects with the edge of the arc plate, and the small flat ruler is placed on the arc die along the radial scale mark, and the angle between the side of the arc plate and the small flat ruler is measured (see Figure 5).
Fig.5. Side angle measurement
6.3 Appearance Quality
6.3.1 Pattern tones
Place the protocol board and the inspected plate side by side on the ground, and stand 1.5m away from the plate for visual inspection.
6.3.2 缺陷
The length and width of the defect are measured with vernier calipers or measuring instruments that can meet the accuracy requirements, and the measured value is accurate to 0.1mm.
6.4 Physical Properties
6.4.1 Bulk density, water absorption
Test according to the provisions of GB/T 9966.3: When the sample size specified in GB/T 9966.3 cannot be met, a sample with a thickness of 50mm × 50mm × plate should be prepared from a representative plate product, and the rest shall be carried out in accordance with the provisions of GB/T 9966.3.
6.4.2 Compressive strength
According to the provisions of GB/T 9966.1 test
When the specimen size specified in GB/T 9966.1 cannot be satisfied, the method of superimposed bonding is used to achieve the specified specimen size. The adhesive surface should be ground to meet the requirements of the fine surface, and the epoxy adhesive should be used, and the excess adhesive should be extruded by pressure, and the test should be carried out after curing, and the loading should be carried out in the superposition direction. This method should be indicated.
6.4.3 Flexural strength
According to the provisions of GB/T 9966.2 test.
6.4.4 Abrasion resistance
According to the provisions of GB/T 19766-2005 Appendix A.
7 Inspection Rules
7.1 Factory Inspection
7.1.1 Inspection items
Wool board: thickness deviation, flatness deviation, appearance quality;
Ordinary plate: specification size deviation, flatness tolerance, angle tolerance, appearance quality;
Arc plate: specification size deviation, angle tolerance, straightness tolerance, line profile tolerance, appearance quality.
7.1.2 Batching
Plates of the same variety, category, grade, and the same supply batch are considered a batch, or the plates installed in successive parts are a batch.
7.1.3 Sampling
The normal inspection method of one sampling was adopted in GB/T 2828.1, the inspection level was II., and the qualified quality level (AQL value) was taken as 6.5, and the samples were taken according to Table 10.
7.1.4 Judgment
When all the inspection results of a single plate meet the corresponding grade in the technical requirements, the plate is judged to meet the grade.
According to the test results of the sample, if the number of non-conforming products found in the sample is less than or equal to the number of qualified judgments (Ac), the batch is judged to be in line with the grade, and if the number of non-conforming products found in the sample is greater than or equal to the number of non-conforming products (Re), the batch is judged to be non-compliant.
Table 10 Units are blocks
7.2 Type Inspection
7.2.1 Inspection items
All items in Chapter 5 Technical Requirements.
7.2.2 Inspection Conditions
In any of the following cases, a type inspection shall be conducted;
a) The new plant is put into operation;
b) Blocks and production processes have been significantly changed;
c) During normal production, it is carried out once a year.
7.2.3 Assembling Batches
Same as factory inspection.
7.2.4 Sampling
Specification size deviation, flatness tolerance, angle tolerance, straightness tolerance, line profile tolerance, appearance quality sampling with factory inspection;
7.2.5 Verdict
When the test results of bulk density, water absorption, compressive strength, bending strength and wear resistance meet the requirements of 5.4, it is judged that the physical properties of the batch of plates are qualified; if there are two or more that do not meet the requirements of 5.4, it is judged that the batch of plates is unqualified; when one does not meet the requirements of 5.4, the item is re-inspected with a sample of preparation, and when the retest results meet the requirements of 5.4, it is judged that the physical properties of the batch of plates are qualified, otherwise the batch of plates is judged to be unqualified. The judgment of the inspection results of other items is the same as the factory inspection.
8 Marking, Packaging, Transportation and Storage
8.1 Logos
8.1.1 The enterprise name, trademark and mark shall be indicated on the outer packaging box of the plate, and the signs of "upward" and "handle with care" shall be displayed and comply with the provisions of GB/T 191.
8.1.2 The installation sequence number shall be indicated for the plates that require the installation sequence.
8.2 Packaging
8.2.1 Pack according to the variety, category and grade of the plate, and attach the product certificate (including product name, specification, grade, batch number, inspector and date of delivery).
8.2.2 The packaging shall meet the requirements of safe loading, unloading and transportation under normal conditions.
8.3 Carriage
In the process of transporting plates, collisions and tumbling should be avoided.
8.4 Storage
8.4.1 Panels should be stored indoors and covered outdoors.
8.4.2 According to the plate variety, category, grade or engineering installation part of the stacking.
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END