聚苯板外墙外保温施工及质量控制.doc

近年来，随着新材料的不断涌现和人们对建筑物节能要求的不断提高，外墙外保温技术作为一种新的节能技术，无论从节能机理和节能效果来说，都具有相当大的优点，其推广和应用已经成为一种必然趋势。相对于外墙内保温来看，外墙外保温具有以下主要优点：

    1、保护主体结构，延长建筑物的寿命。

    由于保温层置于建筑物围护结构外侧，缓冲了因温度变化导致结构变形产生的应力，避免了雨、雪、冻、融、干、湿循环造成的结构破坏，减少了空气中有害气体和紫外线对围护结构的侵蚀。事实证明，只要墙体和屋面保温隔热材料选材适当，厚度合理，外保温可有效地防止和减少墙体及屋面的温度变形，有效地消除顶层横墙常见的斜裂缝或八字裂缝。因此，外保温既可减少围护结构的温度应力，又对主体结构起保护作用，从而有效地提高了主体结构的耐久性，故比外墙内保温更加科学合理。

    2、结构变形产生的应力层基本消除了"热桥"的影响。

    采用外保温在避免"热桥"方面比内保温更有利，如：内外墙交接处、外墙圈梁、构造柱、框架梁及顶层女儿墙与屋面板交界处周边所产生的"热桥"。经统计，底层房
In recent years, emerging as new materials and people on the continuous improvement of energy saving buildings, exterior insulation technology as a new energy-saving technologies and energy-saving mechanism in terms of energy-saving effect, all have a great advantage The popularization and application has become an inevitable trend. Relative to the inner wall insulation of view, exterior insulation has the following main advantages:

    1, to protect the main structure, to extend the life of the building.

    As the insulation layer placed outside the building envelope, the buffer temperature changes lead to structural deformation due to the stress, avoid rain, snow, freezing, melting, wet and dry cycle caused structural damage and reduce the harmful gases in air and ultraviolet corrosion on the envelope structure. Facts have proved that as long as the wall and roofing insulation material selection of the appropriate thickness and reasonable insulation can effectively prevent and reduce the temperature of wall and roof deformation, effectively eliminating the top horizontal wall of the common character inclined cracks or cracks. Therefore, the outer envelope of insulation can reduce thermal stress, but also protective effects on the main structure, thus effectively improving the durability of the main structure, it is within the external wall insulation is more than reasonable.

    2, deformation of the stress layer structure and basic elimination of the "thermal bridge" effect.

    Use of external insulation to avoid "thermal bridge" more favorable than the internal thermal insulation, such as: internal and external wall junction, external ring beam, structural column, frame and roof beams and top of parapet wall around the junction generated by "thermal bridge." The statistics, the underlying housing