1、第三届中国防水技术与市场研讨会 2003 China Waterproofing Technology nearly 20 polymer sheet production lines including EPDM and PVC have been set up with a production capacity increase of 30 million m2. Besides, a roller cutting asphalt shingle line designed in China was put into operation in 2001; a metal sheet (l
2、ead-tin alloy) was successfully produced and has been applied on planted roofs. 1.5 Basically, there is a sufficient supply of main raw materials. Most raw materials including reinforcing mats, PU, acrylic emulsion etc. can rely on domestic supply except APP, APAO and parts of EPDM. 1.6 The manageme
3、nt of design and application techniques has been improved. Codes concerned with roofing and below-grade waterproofing design, material selection, application techniques have 第三届中国防水技术与市场研讨会 2003 China Waterproofing Technology application qualifications of waterproofing contractors have been reviewed
4、 and re-registered, applicators are encouraged to adopt quality guarantee period system. 1.7 International exchanging and cooperation is enhanced. Many advanced new products, new technology and equipment have been imported from the developed countries. 8 American companies and companies from France,
5、 Switzerland and Belgium have entered into the waterproof material market in China playing an active role in promoting the waterproofing technology development. 2. Major problems in the current waterproofing industry of China 2.1 Low-grade and poor products dominate the market affecting the producti
6、on and development of the new advanced waterproof materials. 2.2 There are few types of modified asphalt sheet and polymer sheet, which makes it difficult to form product series. 2.3 Products standards are made by multi-industry departments. The indexes of some standards are too low compared to fore
7、ign standards. 2.4 Waterproof application technology system is badly accessorized for a lack of suppliers of spare parts, accessories and application equipment. 2.5 A lot of small application teams and workers of low professional level pose a threat to projects, often causing leakage. 2.6 Cost budge
8、t for waterproofing projects is too low and pricing is unreasonable, which has a negative effect on their long durability. 3. Measure and policy suggestions 3.1 The development goal and technology guideline for waterproof materials are: making major effort to develop SBS and APP modified asphalt she
9、ets, actively promoting polymer sheets, properly develop environment-friendly waterproof coatings, develop high-grade elastic sealants, and limiting or banning poor and backward products. 3.2 Strengthen management, improve and rectify the market order 3.3 Encourage waterproofing manufacturers to imp
10、rove their scale and professional level, increase product types thus sharpening their comprehensive competitive edge in the market. 3.4 Check the standards of waterproof materials to speed up the step to reach foreign standards. 3.5 Make technology progress through innovations, encourage research an
11、d development of systematic waterproofing technology and put more effort to development of waterproofing application system. 3.6 Improve waterproofing design, application quality and management and provide technique training 第三届中国防水技术与市场研讨会 2003 China Waterproofing Technology & Market 9 for workers
12、3.7 Strengthen quality inspection and supervision: on-site waterproof materials must have product quality certificate and property testing report and must be retested through sampling according to requirements of design and related norms. Those Unqualified waterproofing materials are forbidden to us
13、e in projects. 3.8 Determine a reasonable pricing on unit area of different waterproofing projects and standardize bidding process. Brief Introduction to The Spokesman Li Chenggang, Male, Born in 1932, College Graduate Position: Professor of Architectural Scientific Research Institute of China He wa
14、s sent to study in Architectural Science Institute of Former Soviet Union majoring in waterproofing building technology in 1956. He has been engaged in research on waterproof building materials for a long time. With many awards for his research achievements, he has made important contributions to th
15、e development of waterproof building technology of China. He hosted recovering the roof of the Peoples Grand Conference Hall of Beijing, waterproofing design of Grain Depot of the Central Government etc. and participated in the revising and compiling of Codes of Waterproofing Technique on Below-grade Projects.
