BAIJIAN - Third party testing organization
This part of Scope JT/T 646 specifies the technical requirements and testing methods for acoustic materials for highway sound barriers. This section is applicable to the design、 manufacturing、 and product testing of acoustic materials for highway sound screens. The following normative references are essential for the application of this document. For dated reference documents、 only the version of issue 8 applies to this document. For referenced documents without 8 dates、 the new version (including all modification orders) applies to this document. GB/T 1036 Plastics - Determination of linear expansion coefficient between 30C and 30 "C - Quartz dilatometer method - Determination of tensile properties of GB/T 1040.1 composites - Part 1: General principles - GB/T 1041 Determination of compressive properties of plastics - GB/T 1633 Thermoplastics Vicat softening temperature (VST) GB/T 2410 Determination of Transparent Plastics - Determination of Transmittance and Haze - GB/T 8624 Classification of Burning Performance of Building Materials and Products - GB/T 8626 Flammability Test Method for Building Materials - GB/T 9341; Determination of Bending Properties of Plastics GB/T 14153-1993 General Rules for Drop Hammer Impact Testing of Rigid Plastics CB/T 15227 Test Methods for Airtightness、 Watertightness、 and Wind Pressure Resistance of Building Curtain Walls GB/T 18226-2015 Technical Conditions for Corrosion Protection of Steel Members in Highway Traffic Engineering GB/T 19889 Acoustics - Measurement of sound insulation in buildings and building components - Part 3: Laboratory measurements of airborne sound insulation in building components - GB/T 20247 Acoustic reverberation room sound absorption measurement - CB 50003 Code for design of masonry structures - CB/T 50129 Standard 3 for basic mechanical properties of masonry - Terms and definitions: The following terms and definitions apply to this document. 3.1 Masonry structure refers to a structure composed of bricks and mortar、 with walls and columns serving as the main load-bearing components of a building. It is a collective term for brick face、 block face、 and stone masonry structures. [GB/T50003-2011、 Definition 2.1.1] 3.2 Noise Reduction Coefficient (NRC) The average value of the sound absorption coefficient measured at 250Hz. 00Hz、 100r. 200Hz、 rounded to two decimal places、 with the last digit taken as 0 or 5. [GB/T 3947-1996、 definition 12.43]
Baijian is committed to providing convenient and efficient testing services for enterprises and individuals、 simplifying testing processes、 improving the efficiency of testing services、 using Internet plus testing e-commerce to provide customers with diversified choices、 fundamentally reducing testing costs、 improving time efficiency、 breaking industry limitations and bottlenecks、 and creating an innovative testing platform in the industry. If you need it、 please contact 1850176337
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific、 fair、 and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsinspection and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered、 meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing、 with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle、 low cost、 and attentive service 7. Possess authoritative qualifications such as CMA、 CNAS、 CAL、 etc 8. The testing report is authoritative and effective、 and is generally used in China