"GB8624-2012 building materials and combustion products classification " standard was formally implemented October 1, 2013 , according to the standard increases the calorific value assessment index , but the index is high given , pursuant to the standard requirements, currently only inorganic calorific value of the insulation material can only achieve this requirement, the organic insulation materials present technical level difficult to achieve . Thermal insulation materials at the current index value judgments . A grade material is non-combustible inorganic materials. "Architectural design code for fire protection " provisions , 50 meters above the civil and public buildings must use A grade insulation material. Under this provision can only use inorganic insulation materials , so will I abroad wall insulation system of building energy efficiency , environmental pollution, and staff will have adverse health effects .Wholesale masking tape
Current widespread use of rock wool, glass wool and other inorganic insulation materials production process, the presence of high energy consumption , high pollution during construction , environmental pollution , the construction workers have serious health damage . And such materials can not be the same life with the building , demolition and reconstruction would theoretically over two decades later, construction maintenance costs greatly. Given the serious flaws in the above series of inorganic insulation materials , Professor Huang Maosong recommended for fire protection indicators from 50 meters to 100 meters to relax , that is the height of > 100 m A-class insulation material must be used , height <100 m below grade thermosetting insulation material can be B1 .
Standard Test Methods for Fire Performance GB/T29416-2012 building EIFS interpretation
In B1 or B2 level to achieve the same oxygen index conditions, thermosetting organic insulation materials under real fire conditions GB/T29416-2012 file after promulgation of the organic insulation materials fire performance real fire simulation provides a scientific basis for judgment , and strongly suggests its superior fire safety performance thermoplastic organic insulation materials.Masking tape
In this regard, Professor Huang Maosong suggested that the new standard "architectural design code for fire protection " in the two materials should be clear and distinct difference between the actual fire performance fire protection requirements. The proposed new regulations refer to " Xinjiang building insulation materials for fire protection" that the public through a new file [ 2012 ] No. 69 requirements. That is in the same building height conditions , when using thermosetting insulation materials can be undefended fire buffer zone , which must be used when firebreak thermoplastic insulation materials.
Controversy about the oxygen index
GTB8624-2012 standard insulation materials must reach the B1 level of oxygen index ≥ 30, this requirement is reasonable, there is a dispute . One view is that the existing oxygen index of 28 PU insulation material class B1 as their assessment criteria . Reason is PU insulation material class B1 only oxygen index of 28 is enough. Instead EPS board oxygen index B1 level to reach 32, XPS board oxygen index B1 level to reach 30 , and technically easy to implement, and PU material 30 is technically difficult to achieve , the cost will increase , thus making recommendations B1 level PU oxygen Index 28 to view .Washi tape
For this type of dispute about the oxygen index , Professor Huang Maosong think LOI fire as building insulation materials based on the degree of difficulty is reasonable judgment is correct , is an important means to live as an insulation material to determine combustion properties . Oxygen index of 30 as Class B1 standard GB8624-1997 standard evolved from over, people have become accustomed to accept the insulation material class B2 oxygen index to reach 26, B1 grade insulation material oxygen index to reach 30. Professor Huang Maosong think , if the insulation material class B1 oxygen index to 28 , in a short time is difficult to pass because GB8624-2012 has just issued , holding such a view is reasonable and not legal. PU insulation materials for oxygen index of 30 , from a technical analysis can be achieved . Methods are also present process can be achieved , but the cost will surely be increased. Obviously, this PU insulation material for the B1 level of market competition is detrimental.Sellotape
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