1 General Provisions
1.0.1 This code was formulated for purpose of preventing and controlling the indoor environmental pollution produced by building materials and decorative materials in civil building engineering, guaranteeing the public health, protecting the public interest and achieving advanced technology, economy and rationality.
1.0.2 This code is applicable to the indoor environmental pollution control of the constructed, extended and reconstructed civil building engineering, but it is not applicable to the indoor environmental pollution control of industrial production building engineering, storage building engineering, structures, and the one having special purification and sanitation requirements or the indoor environmental pollution control produced by non-building decoration after the civil building engineering is put into service.
1.0.3 The indoor environmental pollutants under control in this code are radon (hereinafter referred to as "Rn-222"), formaldehyde, ammonia, benzene and total volatile organic compounds (called as "TVOC" for short).
1.0.4 Civil building engineering are divided into the following two categories in accordance with the various requirements for control of indoor environmental pollution:
1 Category I civil building engineering: residential buildings, hospitals, buildings for the aged, kindergartens, and classrooms, etc.
2 Category II civil building engineering: office buildings, shops, hotels, public places of entertainment, bookstores, libraries, exhibition buildings, gymnasia, waiting room of public transit means, dining rooms, barbershops and other civil building engineering.
1.0.5 The building materials and decorative materials selected for civil building engineering must meet the relevant regulations of this code.
1.0.6 In addition to those specified in this code, the indoor environmental pollution control of civil building engineering still shall meet those specified in the relevant current standards of the State.
2 Terms and Symbols
2.1 Terms
2.1.1 Civil building engineering
It is the general term of the structure engineering and decoration engineering of the constructed, extended and reconstructed civil buildings.
2.1.2 Environmental test chamber
It is the equipment used for testing the pollutant release amount of building materials and decorative materials by simulating the indoor environment.
2.1.3 Radon exhalation rate from the surface
It is the radioactivity of radon exhaled from unit area of soil or material surface in unit time.
2.1.4 Internal exposure index (IRa)
It is the quotient obtained by dividing the radioactive specific activity of natural radionuclide radium-226 in building materials by the limit value 200 of specific activity.
2.1.5 External exposure index (Iγ)
It is the sum of the quotient values obtained by respectively dividing the radioactive specific activity of natural radionuclides radium-226, thorium-232 and kalium-40 in building materials by the limit values of specific activity: 370, 260 and 4,200.
2.1.6 Radon concentration
It is the radioactivity of radon in unit volume of air.
2.1.7 Wood-based panels
They are the boards manufactured by machining and separating the vegetable fibre (as the raw material) into different shapes of unit materials, assembling these unit materials, adding adhesives and pressing, including veneer board, fibreboard and particle board, etc.
2.1.8 Decorated wood-based panels
They are boards made with the wood-based panels as the base material, through finishing or coating the compound finishing material as the surface layer.
2.1.9 Water-based coatings
They are coatings using water as the diluent.
