In order to guarantee the quality and safety of construction projects in Beijing, promote energy conservation and environmental protection in the construction industry, popularize the application of energy-saving, land-saving, water-saving and environmental friendly building materials and encourage the development of new building materials and their application, The BMCC and the Commission of Urban Planning, having consulted with opinions from a wide variety of social sources and being approved by relevant experts, issued the fifth list of building materials and construction technologies prohibited and restricted for use. In addition to the building materials in the first four lists of prohibited and restricted materials, another 26 kinds of products are prohibited for use, for example, multifunctional composite cement (with 2 or more functions) expanding agent, light weight ductile cast iron scaffold coupler (perpendicular coupler whose weight is lower than 1.10kg per set, swivel and butt-joint coupler whose weight is lower than 1.25kg per set), non-water-saving devices, etc.; 43 kinds of building materials and construction technologies are prohibited for use, such as the field mixed mortar, thermal insulation materials which are granular heat insulators made of a mixture of polyphenyl granule, vitrification granule, etc. and cementing materials, clay, shale porcelain granule, building products made of clay and shale porcelain granule, the thermosoling construction technique for water-proof coiled materials. Substitutes for some above-mentioned materials are also published on the list.
The performance and quality of construction materials are not only vital to the safety and function of construction projects, environmental protection and resource conservation, but also have a bearing on the dwellers’ health, convenience, vital interests and the development of the economy and the society. With the ongoing acceleration in Beijing’s urbanization process, new requirements are put forward for building materials used in residential and public buildings. Some building materials and manufacturing techniques are prohibited and restricted for use due to factors like poor quality and performance, backward techniques, resource wasting, damages to the environment and public health, failures to reach the standard required and hidden safety hazard. For example, concrete admixtures such as the multifunctional composite cement expanding agent, calcium oxide cement expansive materials and high alkali cement expansive materials, are prohibited for use because of their instability in quality, backward production technique and a high content of alkali which affects the quality of cement materials. Clay brick is prohibited to be produced due to the fact that its production destroys fields and pollutes the environment, and therefore violates the country’s industrial policy. Non-water-saving equipments are prohibited for use for its waste of water resources. Besides, light weight ductile cast iron scaffold coupler is prohibited for use because it affects construction safety; some cheap and substandard architectural coating, waterproof material and heating equipments are prohibited for use due to their poor performance.
Among the 43 kinds of building materials and construction technologies to be prohibited, the construction techniques of field concrete, field mix mortar and the thermosoling construction technique for water-proof coiled materials are prohibited for use in projects at the central area of the city, new construction projects, projects in the municipal economic and technological development zone, and part of non-hypaethral construction projects where air is badly circulated; powder accelerators are prohibited for use in urban planning areas and all important projects, because powder accelerator is rich in alkali, easy to rebound, which causes the spraying of concrete and huge amount of dusts, bring about pollution to the environment and harms to the health of on-site construction workers. The granular mixture of thermal insulators such as polyphenyl granule, vitrification granule, etc. and cement materials are prohibited for use in external wall thermal insulation engineering because the 65% energy saving requirement cannot be met when the heating paste are solely applied; solid brick is prohibited for use in parts above the construction base (including temporary constructions, bounding walls) , because its production process cannot meet resourceconservation requirements and walls made of solid bricks have poor performance in terms of thermal insulation. Moreover, some wall materials, waterproof materials, architectural gluing, drainage pipes and fittings, road materials, municipal engineering materials, heating equipments are listed as materials which shall not be applied in designated construction projects, construction areas and certain periods of time specially specified.
Work units/companies, which are found, by the Construction Committee at municipality/district/county-level, to be purchasing or using prohibited or restricted building materials, will be required to rectify their practices. Meanwhile they will get a notice of circulated criticism and be punished according to the dynamic enterprise qualification management measures on related construction projects issued by the BMCC; names of suppliers will be published in the credit information system of construction project materials suppliers by the BMCC if these suppliers are found to provide prohibited or restrictive building materials.