This standard specifies the terms and definitions, classification and marking, technical requirements, test methods, inspection rules, marks, labels and as well as packaging, transport and storage of mineral wool decorating and acoustic ceilings.
This standard is applicable to mineral wool acoustic ceilings by wet process; it is also applicable to mineral wool acoustic ceilings by dry process.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to, or revisions of, any of these publications do not apply. Parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest edition of the normative document referred to applies.
GB 191” Packaging-Pictorial Marking for Handling of Goods”
GB/T 4132-1996 "Definitions of Terms Relating to Thermal Insulating Materials"
GB/T 5480.1 "Test Methods for Mineral Wool and Its Products—Part 1: General Principles"
GB/T 5464-1999” Non-combustibility Test Method of Building Materials”
GB 6566-2001" Limit of Radionuclides in Building Materials"
GB 8624-1997" Classification for Burning Behavior of Building Materials and Products"
GB/T 8625-1988" Test Method of Difficult-Flammability for Building Materials"
GB/T 8626-1988" Test Method of Flammability for Building Materials"
GB/T 8627-1999 “Test Method for Density of Smoke from the Burning or Decomposition of Building Materials”
GB/T 10294-1988 "Thermal Insulation-Determination of Steady-state Thermal Resistance and Related Properties-Guarded Hot Plate Apparatus"
GB/T 10295-1988 "Thermal Insulation-Determination of Steady-state Thermal Resistance and Related Properties-Heat Flow Meter Apparatus"
GB/T 17657-1999 "Test Methods of Evaluating the Properties of Wood-based Panels and Surface Decorated Wood-based Panels"
GB 18580-2001 ”Indoor Decorating and Refurbishing Materials—Limit of Formaldehyde Emission of Wood-based Panels and Finishing Products”
GBJ 47-1983 ”Acoustics-sound-abserbin Coefficient Measurement by Method of Reverberation Room”
GBJ 88-1985” Code for Measurement of Sound-absorbing Coefficient and Specific Acoustic Impedance of Standing-wave Meter”
HJBZ 25-1998” Asbestos Free Building Materials”
3 Terms and Definitions
The following terms and definitions as well as those defined in GB/T 4132 are applicable to this standard.
3.1 Sound absorption coefficient
The ratio between absorbed and transmitted sound energy flux and incident sound power flux under given frequency and conditions.
3.2 Noise reduction coefficient
The average value of measured sound absorption coefficients under 250Hz, 500Hz, 1000Hz and 2000Hz.
3.3 Right angle deviation
The degree of deviating right angle on two adjacent sides; it is expressed by the ratio of the maximum gap and side length between L-square and board.
