Some standard content:
ICS13.220.50
People's Republic of China Public Security Industry Standard GA160—2004
Replaces GA160—1997
Non-combustible inorganic compound board
Non-combustible inorganic compound board2004-03-29 Issued
Ministry of Public Security of the People's Republic of China
Implementation on 2004-10-01
GA 160—2004
2 Normative References
Terms and Definitions
4 Requirements
4.1 Classification
4.2 Appearance Quality
4. 3 Dimensions and dimensional deviations
4.4 Physical and mechanical properties
4.5 Combustion performance
4.6 Fire resistance
5 Test methods
5.1 Dimensions and dimensional deviations
5.2 Physical and mechanical properties
5.3 Combustion energy
6 Inspection rules
6.1 Inspection classification
6.2 Batching and sampling
6.3 Inspection result judgment principles
6.4 Re-inspection
7 Marking, labeling and storage
4.4, 4.5. Chapter 6 and 7.1 of this standard are mandatory. The rest are optional. This standard shall replace GA160-1997 "General Technical Conditions for Non-combustible Inorganic Composite Panels" from the date of implementation. 160-2004
The main differences between this standard and GA160-1997 are as follows: the requirements for heat shrinkage, moisture absorption sag and combustion performance of composite (sandwich) materials in GA160-1997 are cancelled. The requirements for size deviation of plates with density greater than 1.50≤/cm+, the requirements for bending strength of plates with density greater than 1.75/cm and the requirements for anti-halogenation of glass magnesium plates are added. The index and test method of moisture absorption deformation rate are adjusted.
The combustion performance of this standard is mainly based on GE8624-1997 Classification Method for Combustion Performance of Building Materials. The reference of physical and mechanical properties adopts 1S()/TR 1896:1991 "Non-combustible fiber-reinforced calcium silicate board or cement board for thermal insulation and fire protection", CNS13778A3357 "Test method for fiber-reinforced cement board", CNS13777A2266 "Fiber-reinforced cement board". This standard is proposed by the Fire Department of the Ministry of Public Security.
This standard is under the jurisdiction of the Seventh Technical Committee of the National Fire Standard Promotion Technical Committee. The drafting units of this standard are the Sichuan Fire Science Research Institute of the Ministry of Public Security and Guangzhou Yayuan Environmental Protection Materials Co., Ltd. The main drafters of this standard are Pu Aiping, Li Feng, Cheng Gang, and Ma Fu. 1
1 Fan Yuan
Non-combustible inorganic composite board
GA 160-2D04
This standard specifies the definition, classification, requirements, test methods, inspection rules, marking, labeling and storage requirements of non-combustible inorganic composite boards. This standard is applicable to non-combustible fiber reinforced cement board, non-combustible fiber reinforced calcium silicate board, glass magnesium board or other non-combustible fiber reinforced inorganic composite board.
2 Normative reference documents
The provisions of the following documents become the provisions of this standard through reference in this standard. For all referenced documents with a notified date, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version shall apply to this standard. GB/T5464 Test method for non-combustibility of building materials (idt ISO1182:1990) GB/T7019-1997 Test method for fiber cement products GB8624-1997 Classification method for combustion performance of building materials GB/T10294 Determination of steady-state thermal resistance and related properties of thermal insulation materials - Guarded hot plate method (e9V ISO/DIS8302.1986) JC275-90 Determination of thermal conductivity of aerated concrete 3 Terms and definitions
The following terms and definitions apply to this standard. 3.1
Non-combustible inorganic composite board
Composite board that uses inorganic materials as cementitious materials and adds a variety of modified substances, reinforced with fibers, and can meet the requirements of non-combustibility (milk: fiber reinforced cement board, calcium silicate board, glass magnesium board or other inorganic composite board). 3.2
Glass fibre & magnesium cement board is a magnesium cement material with stable performance, which is made of magnesium oxide (MgO), magnesium fluoride (MgCl) and water (Hz0) ternary system, modified by modification agent, and is made of Zhongcheng or alkali-free glass fiber mesh as reinforcement material and lightweight material as filler. 4 Requirements
4.1 Classification
It is divided into 7 categories according to density. Its categories and basic physical and mechanical properties are shown in Table 1. Table 1 Category and basic physical and mechanical properties
Name Wen Mi Kang
/(g/cma)
1. 50-p1. 75
1. 25~2p1. 50
3 mm plate thickness e
Dry flexural strength/MPu
7 mm plate thickness e
.12 mm
12 mm plate thickness e
Thermal conductivity/
GA 160—2004
Nominal density
p/(g/em)
1. 00≤1. 25
0. 75≤p≤1. 00
0. 5≤50. 75
4.2 Appearance quality
3 mms Plate thickness e
妻1(continued)
Dry bending strength/MPa
7 mm< Plate thickness e
12 tnm
12 mmc Plate thickness e
At least one surface of the plate is flat and should not have defects such as cracks, delamination, corner cavities, cavities, and depressions. 4.3 Dimensions and dimensional deviations
4.3.1 Dimensions
The length of the plate should not exceed 3 000 mm, the width should not exceed 1 250 mm, and the thickness should be less than 70 mm. 4.3.2 Dimension deviation
When the density of the plate is 1.5g/cm, the allowable value of the dimensional deviation should meet the requirements of Table 2. Thermal conductivity/
Wm-IK-1
.0.20
When the board density is more than 1.50/cm, the length and width dimension deviation shall not exceed ±5 mm, and the thickness shall not exceed ±15% of the nominal thickness and shall not exceed ±3 mm at most. The difference between the maximum and minimum thickness measured for the same plate shall not exceed ±15% of the nominal thickness, and the maximum shall not exceed 2.5 mm
Table 2 Allowable values of dimensional deviation
Length/nmm
>2 000
Length, width/mm
Allowable values of edge straightness and diagonal difference 4.3.3
Dimension deviation
1. Not exceeding ±10% of the nominal thickness, and the maximum shall not exceed ±2.5 mm2. The difference between the maximum and minimum thickness measured for the same material shall not exceed ±10% of the nominal thickness, and the maximum shall not exceed 2 mm
The allowable values of edge straightness and diagonal difference shall comply with the provisions of Table 3. Table 3 Permissible values of edge straightness and diagonal difference Item
Edge flatness
Difference of diagonal
Density p(g/cm=)≤1, 5
≤0.2%, the maximum distance between the plate and the reference edge does not exceed 3mm
When the length is ≤2 000 mm, the difference of the diagonal does not exceed 3 mmWhen the length is >2 000 mm, the difference of the diagonal does not exceed 5 mmPhysical and mechanical properties
Physical and mechanical properties shall comply with the provisions of Table 4
Density e(g/cm)>1. 5
≤0. 3%, the maximum distance between the plate and the reference edge does not exceed 5mm
When the length is ≤2 000 mm, the difference of the diagonal does not exceed 5 mmWhen the length is >2 000 mm, the difference of the diagonal does not exceed 7 mmTable 4 Physical and mechanical properties
density/(g/cnr)
Dry flexural strength/MP
Flexural strength in water-absorbed state/MPa
Deviation does not exceed ±10% of nominal density
Meet the specified value in Table 1
Meet 50% of the specified value in Table 1
Thermal conductivity/W·m-1.k1
Moisture absorption deformation rate/camel
Anti-halogen reversion
Note 1, anti-halogen reversion is only applicable to glass magnesium flat panels (continued)
Conform to the specified values in Table 1
No water droplets, no moisture reversion
Note 2, density and thermal conductivity are not mandatory requirements. 4.5 Combustion performance
The combustion performance shall comply with the provisions of GB8624-1997A grade. 4.6 Fire resistance
GA 160-2004
When non-combustible inorganic composite panels are used in building structures or cables with fire resistance requirements, fire resistance tests shall be carried out in accordance with relevant regulations. Its fire resistance shall meet the requirements of relevant building design fire protection specifications. 5 Test methods
5.1 Dimensions and dimensional deviations
5.1.1 Measuring tools
a) Steel tape measure with an accuracy of 1 mm;
b) Measuring tools with an accuracy of no more than 0.1 mm.
5.1.2 Measurement of length and width
Each dimension shall be measured twice with a steel tape measure at the midpoint of the plate edge and at a distance of 25 mm from both sides, with an accuracy of 1 mm. Local defects visible to the naked eye shall be avoided during measurement. The average value of the three measurement results shall meet the requirements of Table 2. 5.1.3 Thickness measurementwww.bzxz.net
On each side of the plate, measure the thickness at 8 points with a vernier caliper according to the measurement positions shown in Figure 1. The average value of the 8 measurement results shall meet the requirements of Table 2.
5.1.4 Straightness measurement
Figure 1 Thickness measurement
Place the four sides of the plate on a reference line longer than the plate, and use a vernier caliper to measure the maximum distance between the plate edge and the reference line edge, accurate to 0.1mm. This distance and its ratio to the side length should meet the requirements of the table. 5.1.5 Diagonal length measurement
Use a steel tape measure to measure the diagonal length of the plate, accurate to 1mm. The difference between the two diagonal lengths should meet the requirements of Table 3. 5.2 Physical and mechanical properties
5.2.1 Preparation of test pieces
Physical and mechanical properties Test pieces should be cut at a distance of not less than 200mm from the plate. Among them, the cutting positions of the dry bending strength and water-saturated bending strength test pieces are shown in Figure 2. 3
GA 160—2004
5. 2, 2 Density
Measured according to the provisions of GB/T7019.
5.2.3 Dry bending strength
Figure 2 Cutting position of bending strength test piece
When the thickness of the test piece e≤20mm, cut 2 test pieces from each board according to the position shown by the solid line in Figure 2a); when e>20mm, cut 4 test pieces from each board according to the position shown by the solid line in Figure 2h). The test piece dimensions are shown in Table 5. The test piece is placed in an oven at a temperature of 100℃105℃ until the mass change rate of two consecutive weighings with an interval of 2h does not exceed ±1%. Put the dried specimens into the dryer, cool to tem-perature, and no longer limit water. Test and calculate the bending strength of the specimens according to the provisions of 9.3.4 and 9.4.2 of GB/T7019--1997. Take the results of 4 tests for 2 specimens and the average value of 8 test results for 1 specimen as the dry bending strength of the specimen. Table 5 Bending strength specimen size
Span between support points=40
Deformation strength in water saturated state
Specimen size
3e (minimum not less than 100)
Unit is change
Distance between support points
When the specimen thickness e-≤20mm, cut 2 specimens from each board at the position shown by the dotted line in Figure 2a>; when e>20tn, cut 4 specimens from each board at the position shown by the dotted line in Figure 2b). The specimen size is shown in Table 5. After the specimen is placed in water above 5℃ for more than 21h, take it out and wipe off the water droplets on the surface with a wool, and immediately test and calculate the bending strength of the specimen according to the provisions of 9.3.4 and 9.4.2 in GB/T7019-1997. Take 4 test results for 2 specimens, and take the average of 8 test results for 4 specimens as the bending strength in the water-saturated state. 5.2.5 Thermal conductivity
The thermal conductivity is tested at a temperature of 20℃±5℃. Calcium silicate board and plate with a thickness of e20mm are tested according to the method specified in GB/T10294, and plate with a thickness of e>20mm is tested according to the method specified in JC.275. 5.2.6 Hygroscopic deformation rate
Two specimens of 300mm×300mm are cut according to the requirements of 5.2.1, and four reference points are determined on the surface of the specimen as shown in Figure 3, and the reference points are 250mm apart in sequence. Immerse the specimen in water at a temperature not lower than 5℃~-35℃ for more than 24 hours, take out the specimen, and accurately measure the distance between 1-2.2~3, 3-4 and 4-1. Then put the specimen in an arch box at 60℃±3℃ and take it out after drying for 24 hours. After cooling to room temperature, accurately measure the distance between 1-2, 2-3, 3-4 and 4-1. The test accuracy is 0.02mm. Calculate the moisture absorption deformation rate according to formula (1):
Where:
Moisture absorption deformation rate, %,
Ll-the distance of the reference point after moisture absorption, in millimeters (mm) F
The distance of the reference point after drying, in meters (tim). Take the average of the eight groups of data as the moisture absorption deformation rate of the sample.
5.2.7 Anti-halogenation
Moisture absorption deformation test piece
GA 160—2004
Cut a 150mm×150mm sample randomly from each of the three plates of a set of samples, put it in a constant temperature and humidity box with a relative humidity of 90% to 95% and a temperature of 40℃+2℃ for 24 hours, then take it out and observe whether there are water drops or moisture. 5.3 Combustion performance
Determine the average temperature rise in the furnace, the average continuous burning time, and the average quality loss rate according to the provisions of GB/T 5161. 6 Inspection rules
6.1 Inspection classification
The inspection of non-combustible inorganic composite boards is divided into factory inspection and type inspection. 6.1.1 Factory inspection
Each batch of products should be inspected before leaving the factory. The appearance quality, dimensional deviation, edge straightness deviation, diagonal difference, density, flexural strength in the ten-phase state, flexural strength in the water-saturated state, and moisture absorption deformation rate specified in this standard are factory inspection items. If necessary, additional inspection days may be added according to product characteristics and intended use or contractual provisions. 6.1.2 Type inspection
6. 1. 2. 1
50 sheets.
When any of the following circumstances occurs, the number of products sampled during type inspection and product finalization identification shall not be less than the trial finalization identification of new products put into production or old products transferred to the factory; b)
After formal production, the formula, process, and raw materials of the product have changed significantly c)
6. 1.2. 2
When the product is stopped for more than one year and then resumes production; when there is a significant difference between the factory inspection and the last type inspection; after two years of normal production:
When the national quality supervision agency or fire supervision department makes an inspection request. The scope of type inspection includes all the items specified in Chapter 4 of this standard. 6.2 Batching and sampling 6.2.1 Non-combustible inorganic composite boards are divided into 150 sheets as a batch, and less than 150 sheets are also a batch. Three sheets are randomly selected from each batch as a group of samples. Three groups should be selected, of which two groups are used for re-inspection. 6.2.2 Factory inspection, appearance quality and dimensional deviation All three sheets of a group of samples should be inspected, and one sheet is inserted from it. Test pieces are cut according to the requirements of Chapter 5 for density, bending strength in the state, bending strength in the state of water absorption saturation, and deformation rate of absorption. 6.2.3 Type inspection In addition to the sampling inspection according to the requirements of 6.2.2, two sheets should be selected from a group of samples. Test pieces are cut according to the requirements of Chapter 5 for physical and mechanical properties and combustion performance tests. 6.3 Inspection result judgment The qualified batch of type inspection and factory inspection products shall be judged according to the judgment number specified in Table 6. The batch shall be qualified when the number of single unqualified items and the total number of unqualified items do not exceed the regulations in Table 6.
Table 6 Number of qualified batches
Appearance quality
Dimension deviation
Edge straightness
Difference between diagonals
Dry state strength
Water absorption saturated state strength
Thermal conductivity
Moisture absorption change rate
Anti-halogen regeneration
Combustion performance
6.4 Re-inspection
Number of samples
1(average value)
Factory inspection
Type inspection
6.4.1 For products judged as unqualified batches, two groups of re-inspected samples from the same batch can be used to re-inspect the unqualified items. If both groups of samples are qualified in the re-inspection, the batch is judged to be qualified.
6.4.2 For batches that are judged as unqualified due to appearance quality and dimensional deviation during factory inspection, remote inspection of the batch of products is allowed, and the plates that pass the inspection are still considered qualified products.
7 Marking, labeling and storage
7.1 The product marking should indicate the production name, address, product name, density, model specification, combustion performance level, implementation standard number, production date, batch number, etc.
7.2 Each batch of products should be accompanied by a certificate of conformity and instructions. 7.3 Products should be stacked flat and stored in a ventilated and dry place to avoid collapse and rain. 7.4 Products should be protected from rain during transportation and should be protected from damage during handling.
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