(Continued)
5.Comparison with international standards and foreign standards
Fiber cement board has been developed for 60 years in foreign countries. The product variety is mainly asbestos cement board. The research shows that asbestos fiber dust has a harmful effect on human being exposed to this environment for a long time. The production of asbestos fiber cement products has been banned in the world. At present, organic fiber, cellulose fiber and other inorganic plant fiber are commonly used to replace asbestos fiber to produce non asbestos fiber cement plate. The current foreign standards mainly include international standard ISO8336:2009, EU standard BSEN12467:2012, American Standard ASTMC1186-08, Australian standard AS3991, Japanese standard JISA5430; regional standards include Taiwan standard CNS13777. The relevant current domestic standards are JC / T671-2008 “vinylon fiber reinforced cement board” and JG / T396-2012 “non load bearing fiber reinforced cement board for external wall”.
The index requirements put forward by the current standards of our country have reached and exceeded the level of international standards and foreign advanced national standards.
6.Main problems in fiber cement board / calcium silicate board industry
According to the statistics of CCPA calcium silicate board branch, there are about 90 fiber cement board / calcium silicate cement board manufacturers in China, with nearly 180 production lines and a production capacity of about 750 million m2, mainly distributed in East and South China. In Xinjiang, about 10 production lines have been built rapidly due to the updating of building external insulation system and the improvement of thermal insulation standards in 2010. At present, the industry has the following main problems:
The products made of different raw materials and different curing processes have different application conditions due to their different performance. However, users do not know enough about the characteristics of the products, and misuse and misuse occur from time to time. For example, in the external wall insulation system in Xinjiang, a large number of calcium silicate boards without surface treatment are used as the panel of external wall insulation board, and less than one is used A large number of them fell off.
Most of the production enterprises are concentrated in East China and South China. The regional distribution is uneven, which increases the transportation cost and reduces the profit space of enterprises.
Fiber cement products enterprises mainly produce base plate, and do not carry out deep processing, so that the market competition of ordinary board is fierce. Homogenization promotes vicious competition of enterprises. Low price sales result in low profit or loss in the industry.
The road of differentiated development lacks technical support. At present, many enterprises take the road of making niche products and closely integrating with the market. Special shaped boards, explosion-proof boards, ecological garden boards and decorative boards with special functions have become the growth points of enterprises’ profits. Due to the small production scale of these new products, the development and application of these new products need further guidance.
The identification of asbestos and non asbestos products is not standardized, which leads to confusion. There are asbestos products and non cotton products in the production line, which results in the mixing of asbestos fiber into the production of non cotton products, which has occurred in product testing.
At present, the board is only positioned in building materials, and the competition with similar products (such as gypsum board, wood board, brick and tile, etc.) is fierce.
The standardization work can not be synchronized with new products and new technologies. For new products developed by enterprises, there is no unified product standard as guidance, So the market development is difficult. The design and construction departments have no basis to follow, so that they have doubts about new products.
7.Conclusion
At present, the market application of fiber cement board and calcium silicate board in our country is still confused. It is of great significance for the reasonable selection and application of these two kinds of plates in practical engineering by thoroughly publicizing and implementing the current standards of the two kinds of plates and understanding the performance indexes and respective application scope of the two kinds of plates.
Sinopower Industries Group Limited can supply you high quality fiber cement board /calcium silicate board production line machinery. Welcome to visit our factory and working site.
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Post time: Aug-24-2020