聚苯板外墻外保溫施工及質量控制.doc

近年來，隨著新材料的不斷涌現和人們對建筑物節能要求的不斷提高，外墻外保溫技術作為一種新的節能技術，無論從節能機理和節能效果來說，都具有相當大的優點，其推廣和應用已經成為一種必然趨勢。相對于外墻內保溫來看，外墻外保溫具有以下主要優點：

    1、保護主體結構，延長建筑物的壽命。

    由于保溫層置于建筑物圍護結構外側，緩沖了因溫度變化導致結構變形產生的應力，避免了雨、雪、凍、融、干、濕循環造成的結構破壞，減少了空氣中有害氣體和紫外線對圍護結構的侵蝕。事實證明，只要墻體和屋面保溫隔熱材料選材適當，厚度合理，外保溫可有效地防止和減少墻體及屋面的溫度變形，有效地消除頂層橫墻常見的斜裂縫或八字裂縫。因此，外保溫既可減少圍護結構的溫度應力，又對主體結構起保護作用，從而有效地提高了主體結構的耐久性，故比外墻內保溫更加科學合理。

    2、結構變形產生的應力層基本消除了"熱橋"的影響。

    采用外保溫在避免"熱橋"方面比內保溫更有利，如：內外墻交接處、外墻圈梁、構造柱、框架梁及頂層女兒墻與屋面板交界處周邊所產生的"熱橋"。經統計，底層房
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
 

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