GB/T 14908-1994 Residential concrete interior wall panels and partition panels GB/T14908-94
Some standard content:
Engineering Construction Standard Full Text Information System
UDC691.32：69.022.4
National Standard of the People's Republic of China
GB/T14908—94
Internal and partition concrete panel in residence
Published on December 30, 1993
Implemented on October 1, 1994
State Bureau of Technical Supervision
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National Standard of the People's Republic of China
Internal and partition concrete panel in residence residence1 Subject content and scope of application
GB/T14908-94
This standard specifies the modulus series, function and quality, quality inspection standards of concrete interior wall panels for general residences and the reference modulus, function and quality, quality inspection standards of concrete partition panels for general residences. This standard applies to precast concrete interior wall panels and precast concrete partition panels in general civil residences built according to the principle of modulus coordination. This standard has guiding significance for the following situations
In the national standard atlas and the standard atlas of various regions and enterprises, the marked dimensions must comply with this standard, and the actual dimensions should take into account the joints and tolerances.
2 Reference standards
4 Code for construction and acceptance of concrete structure engineering
GB50204
GBJ2 Coordinated unified standard for building modulus
Code for design of concrete structures
Code for fire protection design of buildings
GBJ100
GBJ107
GBJ321
Code for fire protection design of high-rise buildings
Code for measurement of building sound insulation
Coordinated standard for building modulus of residence
Concrete strength inspection standard
Quality inspection and assessment standard for precast concrete components Residential sound insulation standard
Technical specification for assessment of concrete compressive strength by rebound method CECS03
Technical provisions for testing concrete strength by core drilling method 3 Terminology
3.1 Interior wall panels: general residential indoor precast concrete load-bearing wall panels. 3.2 Partition board: general residential indoor prefabricated concrete non-load-bearing wall board. 4 Product classification
××-×, partition board GQBX×-X
4.1 Product number: interior wall board NQB
board length hoisting model
Product marking example:
NQB48-6
span size
installation model
State Technical Supervision Bureau approved board length hoisting model on 1993-12-30
implemented on 1994-10-01
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GQB75-3
actual size
hoisting model
4.2 The axis modulus mark size of the interior wall board is as follows (length adopts 3M series, height adopts 1M series). The length of the axis is: 24002700, 3000, 3300, 3600, 3900, 42001, 4500, 4800, 5100mm. The floor height is: 2700, 2800mm
Note: 1) The axis length refers to the mark size 4200, 4500. The distance between the two ends of the inner wall panel and the positioning axis is an integer multiple of 1/2M, and its length is the nXM modular size (n is a positive integer). The height of the inner wall panel is the modular floor height minus the floor thickness and structural dimensions. 4.3 The thickness modulus size of the inner wall panel is as follows (using the 1/5M series): 1202, 140, 160, 1802mm. Note: 2) Thickness modulus reference size 120,180. 4.4 The length of the partition board is the axis modulus mark size minus the distance from its two ends to the axis (using the 3M series). The minimum axis size is: 1200mm.
The maximum axis size is: 3900mm.
The basic modulus is the interpolation value from the minimum modulus to the maximum modulus, that is, 12M+nM (n is a positive integer), and the maximum n is 27. When the actual size of the production component is non-modularized to meet the requirements of the building function, the actual size shall prevail. 4.5 The height mark size of the partition board is the thickness and structural size of the floor height minus the supporting slab (using the 1M series). The floor height is: 2700, 2800mm.
4.6 The thickness modulus size of the partition board is as follows (using the 1/10M series). The thickness modulus is: 50, 60, 70mm.
4.7 The specification series of the interior wall board is shown in Table 1.
Board marking size
Axis length
End opening width
Internal opening width
Inner wall board specification series reference table
Note: b The allowed size should meet the requirements of transportation and installation. 5 Technical conditions
5.1 Functional requirements
10001500
10001500
1100180011002100
5.1.1 As a component of the wall of a house, the inner wall board should meet the requirements of the ultimate state of bearing capacity and the limit state of normal use specified in the design specifications and regulations.
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5.1.2 Structural cracks are not allowed in the inner wall board during the manufacturing and construction stages (including demoulding, lifting, transportation, and installation processes). 5.1.3
Edge structure of interior wall panels:
Should ensure the formation of reliable joints (horizontal joints and vertical joints), which can transfer shear stress and normal stress, and rely on joint connection to make the house structure have reliable integrity;
Should meet the reliable support conditions of the structure during use: c.
Should be convenient for construction and installation, and provide good operating conditions for the grouting process; under the shrinkage condition of the grouting concrete, its function of transferring shear stress and normal stress should not be reduced. The air sound insulation level of the interior wall panels as partition walls should not be lower than level 2 (that is, the sound insulation index is greater than or equal to 45dB). The fire resistance level of the interior wall panels should not be lower than 1.5h (not less than 2.5h for high-rise buildings) of non-combustible bodies, and their design structure should meet the requirements of GBJ16. 5.1.5
Interior wall panels must meet the requirements of the design cracking level of earthquake fortification areas. 5.1.6
Interior wall panels and partition panels must meet durability requirements 5.1.7
Meet the life span required by design and use: be able to resist damage and demolition that affect structural safety or use functions. b.
5.2 Quality requirements for interior wall panels and partition panels (hereinafter referred to as wall panels) 5.2.1 Concrete quality of wall panels:
a. The concrete strength grade of wall panels must meet the design requirements, and the concrete strength grade of solid load-bearing interior wall panels and hollow load-bearing interior wall panels should not be less than C20;
b. The concrete quality of wall panels should comply with the relevant provisions of GB50204; c. The concrete strength grade of wall panels is determined according to the standard value of compressive strength, and the compressive strength test method and evaluation standard should comply with the provisions of item a in Section 6.1.1;
d. The concrete strength grade of wall panels when leaving the factory must meet the design requirements. When there are no special requirements in the design, it should reach 75% of the standard value of concrete compressive strength.
5.2.2 Quality of steel mesh, frame and embedded parts of wall panelsa.
The materials and processing quality of steel mesh, frame and embedded parts shall comply with the relevant provisions of GB50204; the steel bar laying position in the wall panel shall be accurate and meet the requirements of the steel bar protection layer. b.
5.2.3 Specification and dimensional accuracy of wall panels
The specification and dimensional accuracy of wall panels shall be based on the allowable deviation value of the wall panel specifications. If there are no special requirements in the design, the specifications and dimensions of the wall panels shall be in accordance with the provisions of Table 2. Table 2 Wallboard Specifications Dimension Accuracy Standards and Inspection Methods Item
Wall Thickness (Hollow Panel)
Lateral Bending
Surface Flatness
Allowable Deviation
Qualified Products
L/1000
Inspection Method
Measure any part parallel to the height of the wallboard with a steel ruler Select one end and the middle, and measure with a steel ruler
Measure both ends with a steel ruler
At the maximum lateral bending, use the wire drawing method and measure with a feeler gauge or steel ruler Use a 2m ruler and a shape feeler gauge to measure the maximum gap between the ruler and the board surface W.bzsoso.coD Engineering Construction Standard Full Text Information System
Embedded parts reinforcing bars
Center displacement
Flatness with concrete surface
Embedded parts bolts
Center position
Offset
Center position offset
Exposure length
Reserved holes
Reserved holes
Reinforcement protection layer thickness
Diagonal difference
Wall panel surface and appearance quality
Allowable deviation
Qualified products
+10,-5
+10,-5
L/1000
Table 2 continued
Testing method
Measure the center line in both vertical and horizontal directions with a steel ruler, and take the maximum value for testing with a flat ruler and a steel ruler
Measure the center line in both vertical and horizontal directions with a steel ruler, and take the maximum value for measurement with a steel ruler
Measure the center line in both vertical and horizontal directions with a steel ruler, and take the larger value for measurement with a steel ruler or use a steel bar protection layer measuring instrument to measure the two diagonals with a steel ruler
Check with a 2m ruler and a feeler gauge
The concrete should be vibrated densely, and there should be no honeycombs, roughness or cracks that affect the structural performance of the wall panels; the quality standards for concrete honeycombs, local roughness, holes, cracks on the wall panel surface and defects in the wall panel appearance should be in accordance with the requirements of Table 3. Table 3
Quality standards and inspection methods for the surface and appearance of wall panels Item
Any part
Main stress-bearing part
Secondary part
Pockmarks, peeling, bubbling, peeling
Surface hollowing, sanding, corner loss
Cracks at the ring
Corner cracks at the door and window openings
Untidy appearance
Surface cleanliness
Quality requirements
Not allowed||tt| |Not allowed
Not allowed
The total area shall not exceed 1% of the wall panel area, and each place shall not exceed 10000mm2/m2
The total area shall not exceed 2% of the wall panel area (and not more than 20000mm2/m2)
Not allowed
Not allowed
Should not have
There should be no signs of pollution
When there is no special requirement in the design, the weight of the wall panel shall be based on the dry density of concrete. 5.3 Structural performance of wall panels
Test method
After visual inspection, use a steel ruler to measure its average length and width, and calculate its area
Visual inspection, use a steel ruler to measure its area
Visual inspection, use a magnifying glass when necessary
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5.3.1 The design and construction of wall panels shall meet GBJ10. 5.3.2 The data required for the structural performance inspection of wall panels shall be indicated by the design unit in the design drawings. 6 Inspection methods and inspection rules
6.1 Inspection methods
6.1.1 Inspection of concrete compressive strength
The method for evaluating the concrete compressive strength of concrete interior wall panels and partition panels is to load the concrete cube specimens after molding. When the specimen is not representative or there is no specimen, the non-destructive method is used to test the compressive strength of concrete. The specimen can also be drilled directly from the concrete slab and the compressive strength test is carried out in accordance with relevant regulations. The concrete compressive strength test, detection and assessment methods shall be in accordance with the relevant provisions of GB50204 and GBJ107; b.
When testing the compressive strength of concrete by non-destructive methods, the provisions of JGJ23 shall be followed; when testing the main compressive strength of concrete by drilling method, the provisions of CECS03 shall be followed. The inspection methods for the binding and welding quality of steel mesh and skeleton shall comply with the provisions of GBJ321. The lifting eye bars must be made of whole steel. 6.1.2
Test of structural performance of wall panels
The structural performance test mainly includes the inspection of the strength, rigidity and crack width of the panels; b.bZxz.net
The structural performance test of interior wall panels shall be carried out in accordance with the relevant provisions of GBJ321 or design requirements, and comply with the terms of this standard: When the interior wall panels are under the specified conditions of use, the vertical static load capacity test is generally not carried out during product inspection. The strength quality of the product is controlled by the concrete strength of the demoulding, pool and factory c.
: d. If the interior wall panels do not meet the use conditions specified in the design, necessary structural performance tests shall be carried out, and the vertical load test method shall be carried out in accordance with 6.1.3.
6.1.4 Test method for vertical load of interior wall panels
Before the test, an appearance inspection should be carried out and the provisions of 5.2.4 of this standard should be met. The original defects and cracks should be marked on the surface of the wall panels:
b. All loading equipment, instruments and meters should be calibrated or corrected;c. The support method and load arrangement are as follows:
Schematic diagram of loading of load-bearing interior wall panels
1—Load-bearing frame beam; 2—Upper beam; 3—Sensor; 4—Jack; 5—Lower beam; 6—Load-bearing frame; 7—Test instrument; 8—Test board 9—Load-bearing platform d. Loading should be carried out in stages. Within the standard load, each level should take 20% of the standard load. When exceeding the standard load, each level of load should take 10% of the standard load. When approaching the calculated failure load, each level of load should take 5% of the standard load until failure. e: After each level of load is applied, it should last for 15-20 minutes; when the standard load is reached, it should last for 30 minutes. During each duration, the deformation and cracks should be carefully observed and the crack width and whether the steel bars are slipping should be marked, and the test records should be filled in according to the format of Table 4. f. The test parameters and test indicators required for the structural performance test shall be indicated on the design drawings. Table 4 Concrete wall panel structural performance test record sheet No.:
Commissioning unit:
Production date:
External dimensions
Number of main reinforcement
And specifications
Loading diagram, instrument location and number
Concrete cube
Volume compressive strength
Displacement of each measuring point, mm
Wall panel name and model:
Test date:
Loading equipment
Wall panel deadweight
Number of times Time Cumulative readings at each level Difference Cumulative readings Cumulative difference
Conclusion:
Responsible person:
Measured deformation
Verification:
Standard load
6.1.5 The sound insulation measurement method of wall panels shall comply with the relevant provisions of GBJ11 and GBJ75. 6.1.6
For the weight inspection of wall panels, if there is no special requirement, the inspection of concrete dry capacity shall be used as the standard. Inspection method for the dimensional accuracy and appearance quality of wall panels Deformation
Inspection index
Bearing capacity
Crack conditions and damage characteristics
Maximum crack width
Record:
The inspection standards and methods for the dimensional accuracy and appearance quality of wall panels shall be in accordance with the provisions in Table 2 and Table 3; the evaluation method for the dimensional accuracy and appearance quality of wall panels shall be in accordance with GBJ321, and the test results shall be recorded in the table in Appendix A. Inspection rules
Factory inspection
The appearance quality of wall panels shall be inspected item by item, and the inspection results shall be filled in Table 2; the product certificate in Appendix B shall be submitted for inspection.
Type inspection should generally be carried out in the following cases: when new wall panels or old products are updated;
After normal production, if there are major changes in the structure, raw materials, and production process that may affect product performance, when the product is stopped for a long time and resumed;
When the factory inspection results are significantly different from the last type inspection; when the national quality supervision agency proposes a type inspection requirement. 6.2.3 Judgment rules
6.2.3.1 The specification and dimensional accuracy of the wall panels shall comply with the requirements of Table 2, and the dimensional deviation greater than the allowable deviation shall be considered as unqualified products. 6.2.3.2 The surface and appearance quality of the wall panels shall comply with the quality requirements of Table 3. Engineering Construction Standard Full Text Information System
7 Marking, factory certificate, storage and transportation 7.1 Marking
Each wall panel shall be numbered according to the design requirements after demoulding, including product specifications, models, strength, appearance, production date and inspection stamp. Each wall panel leaving the factory must be marked with the factory name or factory logo, project name, wall panel model, production date and the word (qualified) in a conspicuous position.
7.2 Wall panels must be accompanied by a factory certificate, i.e., a wall panel certificate of conformity, see Appendix B. 7.3 Storage
7.3.1 The storage site for wall panels should be a solid natural floor, and must be manually leveled and compacted to achieve sufficient strength, and have drainage measures. Wall panels should be leveled with wooden pads.
7.3.2 Wall panels should be stacked vertically in fixed racks according to the force to ensure stability under external force. The lifting rings should be facing upwards and the markings should be facing outwards. Wooden blocks should be used to separate the upper panels of the wall panels. 7.3.3 When stacking, they should be classified and stacked according to model and type. 7.3.4 No more than 10 partition panels produced by laminated flat molds should be stacked at a time. 7.4 Transportation
7.4.1. The concrete strength of the wall panels during transportation must reach 75% of the standard value of concrete compressive strength if there is no special design requirement. 7.4.2 The support position and method of the wall panels on the transport vehicle should not cause damage to the wall panels due to overstress of the concrete, and there should be special support devices to ensure that the wall panels do not loosen or slip, and to ensure the quality and safety of transportation. 7.4.3. The wall panels must have special hoists or clamping devices during transportation and installation. W.bzsoso.coI Engineering Construction Standard Full Text Information System
Production unit:
Project number
Wall thickness hollow slab
Surface flatness
Lateral bending
±5±5±3±24L/1000
Foreman:
Pre-prepared parts
Embedded bolts
Appendix A
Inspection record
(reference part)
Center displacement
Reinforcement protective layer
Difference of diagonal
10L/1000||t t||Team leader:
Main
Stress-bearing
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Production unit:
Project name:
Wallboard name and model
Additional instructions:
Production date
Appendix B
Product certificate
(reference)
Concrete
Strength grade
Xiao Chen's actual strength
This standard is proposed by the Ministry of Construction of the People's Republic of China. Type
No.:
Mechanical properties
Structural properties
Seal of the inspection department of the manufacturer
This standard is under the jurisdiction of the China Building Standard Design Institute, the technical unit responsible for the standard of building structure components of the Ministry of Construction. This standard was drafted by China Building Standard Design Institute and Beijing Institute of Building Engineering. The main drafters of this standard are Liu Kun, Huang Ji, Bai Changju, Ye Dawei and Han Quan. This standard is entrusted to China Building Standard Design Institute for interpretation.
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