Test Conclusions and Recommendations for Fire Resistance Insulation System
Posted By Claire on December 29, 2012
We understand that, at this stage, a lot of scientific research institutions and experts experimental effort to the fire performance of the wall panels exterior insulation system seminars, experiments, they applied a variety of different approaches, they have come to what conclusion? But also for the construction industry in China What progress? comprehensive experimental results and the type of fire insulation performance of various insulation materials system analysis, the preliminary draw the following conclusions:
1, the fire performance of external thermal insulation system (1) B2 EPS board – thin plaster system has a certain anti-fire to. Set Fire Barrier (also set fire block beam) system, enabling the further advancement of the fireproof safe performance of the system as a whole to reduce the risk of spread of the flame. (2) 20cm of Rockwool Fire Barrier able to meet the demand of the Fire Barrier enough to the flame arrester. (3) B2 grade polyurethane foam board low flame spread thin plaster system, do not set the Fire Barrier. (4) thick safeguarding layer of external wall the outer insulation system flame propagation, the Fire Barrier may not be provided within the system. (5) external thermal insulation system, the outside of the insulation layer such as the presence of the cavity, it is necessary to stop the effective closure to reduce the risk of fire spreading.
2, the effects of the fire performance of construction quality external insulation system insulation fire critical to the performance of the the system protective layer construction quality system.
Thin plaster external wall insulation systems in the October 21, 2008 to stop the contraction polystyrene board – exterior wall of rigid polyurethane foam the Fire Barrier insulation board experiments and March 18, 2009 to stop the contraction polystyrene board insulation system – pick along the experiment during the experiment presents a large area of the protective surface layer instant opened phenomenon, incurred the system internal insulation material exposed in the air and produce rapidly extinguished, increase the risk of system flame propagation. Therefore, the construction process necessary in strict accordance with the relevant norms to stop the construction operation to prevent the strengthening Aboshi lap. Construction best to follow the top-down or bottom-up sequence, in order to ensure convergence site is not within the exterior insulation system there is a big gap, thereby reducing the risk of fire conditions destroyed.
3, the fundamental insulation materials request extinguished performance of insulation materials used in exterior insulation should not be less than the B2 level, and crack request to stop the scene to witness the sampling and testing of products in accordance with the relevant materials specifications. Polyurethane foam, extinguished the performance request Class B2 plus oxygen index ≥ 26%; XPS, EPS, extinguished performance requests Class B2 plus oxygen index ≥ 30%; extinguished request for B2 level performance. Existing consumer technical level that can be reached under the conditions, the initiative of the request to increase the oxygen index of the XPS, to control the performance of the material extinguished, its technical indicators can rule is: the oxygen index of ≥ 26%. Taken in the design and construction of effective structural fire protection measures after large proportion of window fire experiments testing the effectiveness of structural measures, and the separation the extinguishing performance level of insulation materials shall not be less than the B2 level and limit oxygen index of the material, to ensure the building surrounded The retaining structure fireproof safe, a cumbersome and easy new way has general application in our discussion prospects. This experiment is of great significance: the corner of the exterior insulation and finish systems fire experiments and window fire experiments, especially window fire experimental able to mimic the architectural interior, outside fire attack on the building, the model size can cover including fire partition all the system structure, the experimental state can be plenty of repercussions exterior insulation system to practice fire fire resistant, and can be used for the ignition and spread of the overall evaluation of exterior insulation and finish systems. From the the attack probability point of view of the practice fire building, window fire experiment more general sense, the the window the fire experiment should become the focus of future seminars.
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