This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, etc. of rubber speed reduction ridges. This standard applies to devices installed at the entrances of highways, urban roads and related places (such as schools, residential areas, etc.), with the main material being rubber and having the function of slowing down vehicles. GA/T 487-2004 Rubber Speed ​​Reduction Ridges GA/T487-2004 Standard download decompression password: www.bzxz.net

This standard is proposed and managed by the Technical Committee for Road Traffic Management Standardization of the Ministry of Public Security. This standard is drafted by the Traffic Management Science Research Institute of the Ministry of Public Security. The main drafters of this standard are: Li Aimin, Yu Chunjun, Wu Yunqiang, Zhang Jun. GA/T487-2004
1 Scope
Speed ​​reduction barriers
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, etc. of rubber speed reduction ridges. GA/T 487-2004
This standard applies to devices installed at the exits of highways, urban roads and related places (such as schools, residential areas, etc.), with the main material being rubber and having the function of slowing down vehicle speed.
2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For all dated referenced documents, 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 un-dated referenced documents, the latest version shall apply to this standard. GB/T528--1998 Determination of tensile stress-strain properties of vulcanized rubber or thermoplastic rubber GB/T529—1999 Determination of tear strength of vulcanized rubber or thermoplastic rubber GB/T531—1999 Test method for indentation hardness of rubber pocket hardness meter GB/T1681—1991 Determination of rebound resilience of vulcanized rubber GB/T 16891998
Determination of wear resistance of vulcanized rubber
GB/T3512—2001
Hot air accelerated aging and heat resistance test of vulcanized rubber or thermoplastic rubber GB/T3978 Standard illuminant and lighting observation conditions GB/T9868 General rules for rubber to obtain test temperatures above or below normal temperature 3 Requirements
3.1 Composition and general requirements
3.1.1 Composition
The rubber reducer consists of yellow and black alternating rubber reducer units. 3.1.2 General requirements
The rubber deceleration ridge should be integrally formed, and the outer surface should have stripes to increase adhesion. Each deceleration ridge unit should have retroreflective material facing the direction of vehicle travel for easy identification at night. The surface should be free of pores, no obvious scratches or missing materials, and the color should be uniform and without flash. The name of the production unit should be pressed on the surface of the rubber deceleration ridge. If connected to the ground by bolts, the bolt holes should be countersunk. The deceleration units should be connected in a reliable manner.
The cross-section of the deceleration ridge unit in the width and height direction should be approximately trapezoidal or arc-shaped. Its width dimension should be within the range of (300mm±5mm) to (400mm±5mm), and its height dimension should be within the range of (25mm±2mm) to (70mm±2mm). The ratio of the height to width dimension of the rubber deceleration ridge used on highways and urban roads should not be greater than 0.7. 3.2 Pressure resistance
Test according to the requirements of 4.2. After the test, the rubber deceleration ridge should not have any damage or cracking. 3.3 Physical properties
3.3.1 Elongation at break
The elongation at break of the rubber deceleration ridge surface material shall not be less than 200%, and the elongation at break of the rubber deceleration ridge surface material used on highways and urban roads shall not be less than 250%.
3.3.2 Tensile strength
The tensile strength of the rubber deceleration ridge surface material shall not be less than 6.0MPa, and the tensile strength of the rubber deceleration ridge surface material used on highways and urban roads shall not be less than 8.5MPa.
3.3.3 Shore A hardness
The Shore A hardness of the rubber deceleration barrier surface material shall be in the range of 65 to 85. 3.3.4 Tear strength
The tear strength of the rubber deceleration ridge surface material shall not be less than 20kN/m. 3.3.5 Wear loss
The wear loss of the rubber deceleration ridge surface material shall not be greater than 0.8cm2/1.61km. 3.3.6 Impact elasticity
The impact elasticity of the rubber deceleration surface material shall not be less than 20%. 3.4 Retroreflective performance
The retroreflective performance of the rubber deceleration barrier unit facing the direction of vehicle travel shall not be lower than the requirements specified in Table 1. Table 1 Luminous intensity coefficient
Observation angle α
3.5 Climate and environmental adaptability
Human incidence angle β
(Human incidence angle β0°)
±20°
Luminous intensity coefficient/(mcd·Ix-1)
After undergoing various environmental tests, the rubber deceleration barrier shall not have discoloration, cracks, peeling, warping, etc., and its elongation at break and tensile strength shall still meet the requirements of 3.3.
3.6 Solvent resistance
After wiping the rubber deceleration ridge with No. 93 gasoline, there should be no obvious signs of dissolution and damage. After wiping the rubber deceleration ridge with No. 0 diesel, there should be no obvious signs of dissolution and damage. After wiping the rubber deceleration ridge with SAE5W-30 lubricating oil, there should be no obvious signs of dissolution and damage. 4 Test method
4.1 Composition and general requirements
Visually inspect the appearance of the rubber deceleration barrier, and measure the relevant dimensions with a measuring tool with a measuring accuracy of not less than 1mm. 4.2 Pressure resistance test
A two-axle vehicle with a vehicle weight of 20t passes through a rubber deceleration barrier fixed on the road surface at a speed of 40km/h. After the test, visually inspect the sample and it should meet the requirements of 3.2.
4.3 Physical property test
4.3.1 Elongation at break
According to the requirements of GB/T528-1998 for type 1 dumbbell-shaped specimens, the elongation at break of the rubber deceleration ridge surface material shall meet the requirements of 3.3.1.
4.3.2 Tensile strength
According to the requirements of GB/T528--1998 for type 1 dumbbell-shaped specimens, the tensile strength of the rubber deceleration barrier surface material shall meet the requirements of 3.3.2.
4.3.3 Shore A hardness
According to the test method specified in GB/T531--1999, the Shore A hardness of the rubber deceleration ridge surface material shall meet the requirements of 3.3.3.
4.3.4 Tear Strength
GA/T 487--2004
According to the requirements of GB/T529-1999 for right-angled specimens, the tear strength of the surface material of the rubber deceleration barrier shall meet the requirements of 3.3.4.
4.3.5 Abrasion Loss
According to the test method specified in GB1689--1998, the abrasion loss of the surface material of the rubber deceleration ridge shall meet the requirements of 3.3.5. 4.3.6 Impact Elasticity
According to the test method specified in GB/T1681-1991, the impact elasticity of the surface material of the rubber deceleration barrier shall meet the requirements of 3.3.6.
4.4 Retroreflective Performance Test
4.4.1 Test Conditions: The test is carried out in a dark room. See Figure 1 for the test principle. The light source adopts the standard illuminant A light source specified in GB/T3978. The aperture angle of the sample reference center to the light source should not be greater than 0.2°. The non-uniformity of the vertical illumination of the sample illuminated area should not be greater than 5%. The light detector is an illuminance meter calibrated by the spectral light efficiency curve and is installed directly above the light source. The aperture angle of the sample reference center to the light detector should not be greater than 0.2°. The light detector should be able to move freely up and down to ensure that the observation angle changes from 0.2° to 1.0° or more.
The distance from the front surface of the light detector to the sample surface should not be less than 15m. The deceleration unit sample is installed on a rotatable sample holder according to the use state. When it rotates along the second axis, the sample can obtain the incident angle 阝; when it rotates along the first axis, the sample can obtain the incident angle β. 4.4.2 Measurement process:
Place the light detector at the reference center of the sample, facing the light source, and measure the illumination value E1 perpendicular to the sample surface. -Clamp the sample, set the observation angle β to 0.2°0.33°, the incident angle β2 to 0°, ±20°, ±5° and other geometric conditions, measure the illumination value E of the reflected light, and calculate its luminous intensity I. The luminous intensity coefficient of the sample can be calculated according to the following formula: R= I/E+ =Ed/El
Where:
R——luminous intensity coefficient of the sample, in candela per lux (cd·Ix-1); I—luminous intensity of the sample, in candela (cd); E1——vertical illuminance of the sample at the reference center, in lux (Ix); E,—reflected light illumination measured by the photodetector under different observation angles and incident angles, in lux (1x); the distance between the reference center of the sample and the center of the photodetector surface, in meters (m). d
B2 Second axis
Light detector
Figure 1 Schematic diagram of luminous intensity coefficient test
GA/T 487--2004
4.5 Climate environment adaptability test
4.5.1 High temperature test
4.5.1.1 Test equipment
The test equipment shall meet the requirements of GB9868. 4.5.1.2 Test method
Put the rubber deceleration ridge and material samples in an environment of 55℃ ± 2℃ for 8h. After the test, visually inspect the samples and test their physical properties. They shall meet the requirements of 3.5.
4.5.2 Low temperature test
4.5.2.1 Test equipment
The test equipment shall meet the requirements of GB9868. 4.5.2.2 Test method
Put the rubber deceleration ridge and material samples in an environment of -40℃ ± 2℃ for 8h. After the test, visually inspect the samples and test their physical properties. They shall meet the requirements of 3.5.
4.5.3 Heat air aging test
4.5.3.1 Test equipment
The test equipment shall meet the requirements of GB9868. 4.5.3.2 Test method
Place the rubber deceleration ridge and material samples in the aging test chamber for 168h, and test the hot air accelerated aging and heat resistance of vulcanized rubber or thermoplastic rubber according to GB/T3512-2001. The test temperature is 60℃±3℃. After the test, it should meet the requirements of 3.5. 4.5.4 Salt spray corrosion test www.bzxz.net
4.5.4.1 Test equipment
The test equipment should meet the requirements of GB9868. 4.5.4.2 Test method
Place the rubber deceleration ridge and material samples in the salt spray corrosion test chamber, with the test surface at 30° to the vertical direction, the mass percentage concentration of the salt solution is 5%±1%, the temperature in the test chamber is maintained at 35℃±2℃, and spray for 15min every 45min within 96h. After the test, rinse the sediment on the surface of the sample with running water, rinse with distilled water, and then place it at room temperature to dry naturally for 2h. The sample should meet the requirements of 3.5.
4.6 Solvent resistance test
Wipe the rubber speed reduction barrier sample with the solvent specified in 3.6 for 5 minutes. After the test, it should meet the requirements of 3.6. 5 Inspection rules
5.1 Inspection classification
The inspection of rubber speed reduction ridge is divided into type inspection and factory inspection. 5.2 Type inspection
Type inspection should be carried out in any of the following situations: a) Trial type identification of new products or old products transferred to factory production; after formal production, if there are major changes in structure, materials, and processes, it may affect product performance; b) 1
c) During formal production, inspection is carried out once every 2 years; d) The results of the final inspection are significantly different from those of the last type inspection. Carry out type inspection according to the provisions of Table 2. If all the inspection results meet the requirements of this standard, the product is judged to be a qualified product. If one item does not meet the requirements of this standard, the product is judged to be unqualified. 5.3 Factory inspection
Factory inspection is carried out by the manufacturer according to Table 2. 4
6 Marking
6.1 Product marking
The product should have a clear and durable manufacturer’s name or logo. 6.2
Packaging marking
GA/T 487—2004
The product name, manufacturer’s name, address or logo, trademark, product standard number, quantity, etc. should be indicated on the outer packaging box. Table 2 Inspection items
Packaging, transportation and storage
Inspection items
Composition and general requirements
Pressure resistance
Physical properties
Retroreflective performance
Adaptability to climate and environment
Solvent resistance
Technical requirements clauses
Test method clauses
Type inspection
Factory inspection
Each set of products shall be properly packaged in accordance with the requirements of transportation and storage to prevent product damage. The packaging box shall contain instruction manual, product inspection certificate, packing list, etc.
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