一、聚合物抹面砂漿穆递、水泥類膩子的防裂性，重點在原材料的選擇上又蝌，選用優(yōu)質(zhì)的原材料经禽、充分認識和了解各種原輔材料性質(zhì)與作用機理，科學(xué)配方笑诫，選用功能性強的铝矢、性能穩(wěn)定可靠的優(yōu)質(zhì)產(chǎn)品，能較好地預(yù)防裂縫的產(chǎn)生咽行。

1跪消、 The crack resistance of polymer plastering mortar and cement putty focuses on the selection of raw materials. High quality raw materials are selected, and the properties and mechanisms of various raw and auxiliary materials are fully understood. Scientific formulas are used, and high-quality products with strong functionality, stable and reliable performance are selected to effectively prevent the occurrence of cracks.

二、建筑設(shè)計特別是外墻保溫構(gòu)造設(shè)計上應(yīng)嚴(yán)謹(jǐn)差讼，應(yīng)充分考慮地基沉降准魁、抗震、抗風(fēng)壓赫斥、應(yīng)力釋放卤竭、環(huán)境影響等問題。

2硼婿、 Architectural design, especially the exterior wall insulation structure design, should be rigorous and fully consider issues such as foundation settlement, earthquake resistance, wind pressure resistance, stress release, and environmental impact.

三锌半、施工工藝上，為避免抹面砂漿寇漫、外墻膩子產(chǎn)生較大的干縮力刊殉，每次刮抹均應(yīng)宜薄不宜厚，抹面砂漿每次刮抹不超過2.5MM層厚州胳，外墻膩子每次刮抹不超過1MM層厚记焊。

3逸月、 In terms of construction technology, in order to avoid significant drying shrinkage caused by plastering mortar and exterior wall putty, each scraping should be thin rather than thick. The plastering mortar should not exceed a layer thickness of 2.5mm each time, and the exterior wall putty should not exceed a layer thickness of 1mm each time.

四、外墻保溫層的設(shè)計與施工均未考慮到保溫層內(nèi)應(yīng)力的釋放問題遍膜，整個墻面從上至下幾層碗硬、幾十層樓高一氣呵成，沒有設(shè)計伸縮縫瓢颅，一旦產(chǎn)生較大的應(yīng)力恩尾，整個保溫層乃抹面砂漿、外墻膩子惜索、涂料層就會不可避免產(chǎn)生裂縫特笋。

4、 The design and construction of the external wall insulation layer did not take into account the issue of stress release inside the insulation layer. The entire wall is several floors from top to bottom, dozens of floors high, and there are no expansion joints designed. Once significant stress is generated, cracks will inevitably occur in the entire insulation layer, including the plastering mortar, external wall putty, and coating layer.

五铡碧、干混抹面砂漿嗦休、外墻膩子或常用水泥中不宜過量、過多使用聚乙烯醇類愧蔬、乳膠類等封閉性很強的膠粘劑首捶，此類膠粘劑能迅速成膜和封閉水泥微孔，并加劇水泥產(chǎn)生干縮力茴夯，形成“硬殼”現(xiàn)象按冷，與基層形成較大的強度差，即面層強度大大超過基層強度屁茁，容易造成龜裂芳乎、空鼓、脫落组伐。此外捍睡，水泥砂漿微孔一旦被完全封閉，這不僅會影響水泥充分水化硕帖、而且會使水泥砂漿喪失“自由呼吸”和自養(yǎng)護功能唧取，墻體中不良成份不能隨水份通過微細孔淅出，墻體使用壽命就會較差划提。

5枫弟、 Excessive use of strong sealing adhesives such as polyvinyl alcohol and latex should not be used in dry mix mortar, exterior wall putty, or commonly used cement. These adhesives can quickly form a film and seal cement micropores, exacerbate the drying shrinkage force of cement, form a "hard shell" phenomenon, and form a significant strength difference with the base layer. That is, the strength of the surface layer greatly exceeds the strength of the base layer, which is prone to cracking, hollowing, and peeling. In addition, once the micropores of cement mortar are completely sealed, it will not only affect the full hydration of cement, but also cause the cement mortar to lose its "free breathing" and self curing function. Poor components in the wall cannot be separated with water through the micro pores, and the service life of the wall will be poor.

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