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MS密封膠耐老化性能差引起的脫粘開裂漏水情況
- 發(fā)布時間 : 2026-3-9 11:51:17
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(Summary description)Customized SILICONE STRUCTURAL SEALANT from China manufacturer refers to the adhesive with high strength, can bear large load, aging resistance, fatigue resistance and corrosion resistance, and has stable performance within the expected life. It is suitable for bearing the bonding of strong structural parts. Non structural adhesive has low strength and poor durability. It can only be used for bonding, sealing and fixing of ordinary and temporary properties, and cannot be used for structural adhesive bonding. NEUTRAL SILICONE WETHERPROOF SEALANT from China manufacturer is a structural adhesive with waterproof function. Silicone glue refers to the adhesive based on silicone rubber. According to different functions, it can be divided into structural adhesive, potting adhesive, sealant, thermal conductive adhesive, flame retardant adhesive and so on.
MS密封膠耐老化性能差引起的脫粘開裂漏水情況
(Summary description)Customized SILICONE STRUCTURAL SEALANT from China manufacturer refers to the adhesive with high strength, can bear large load, aging resistance, fatigue resistance and corrosion resistance, and has stable performance within the expected life. It is suitable for bearing the bonding of strong structural parts. Non structural adhesive has low strength and poor durability. It can only be used for bonding, sealing and fixing of ordinary and temporary properties, and cannot be used for structural adhesive bonding. NEUTRAL SILICONE WETHERPROOF SEALANT from China manufacturer is a structural adhesive with waterproof function. Silicone glue refers to the adhesive based on silicone rubber. According to different functions, it can be divided into structural adhesive, potting adhesive, sealant, thermal conductive adhesive, flame retardant adhesive and so on.
- 發(fā)布時間 : 2026-3-9 11:51:17
- Views:
Information
此次調(diào)研中，其中10個項目MS密封膠有一定程度的老化(MS密封膠非品牌)，MS密封膠硬度增加、彈性下降。部分典型項目具體調(diào)研結(jié)果見表。
以上調(diào)研項目MS密封膠均具有如下情況:MS密封膠整體硬度較高，斷裂伸長率較低。以上情況結(jié)合服役年限，可認為硬度上升明顯，老化現(xiàn)象明顯。
廣州某大廈，建于1998年，幕墻MS密封膠已使用24年，調(diào)研結(jié)果:建筑幕墻頂面MS密封膠的硬度比立面MS密封膠的硬度要更高一些，且頂面MS密封膠的彈性比立面MS密封膠的彈性要差，差異明顯�？赡芘c建筑幕墻頂面受太陽紫外線照射時間更長有較大關(guān)系。
在廣州部分調(diào)研工程中，有5個項目MS密封膠老化情況比較嚴重(MS密封膠非品牌)，MS密封膠硬度偏高，彈性較差。部分項目有出現(xiàn)開裂或脫粘，導(dǎo)致漏水問題，具體調(diào)研結(jié)果如下。
廣州某綜合樓，建于2000年，幕墻已服役22年，玻璃幕墻MS密封膠明顯老化，硬度在6367之間，局部存在因厚度不足造成的開裂情況。采用“啞鈴型試片”測得斷裂伸長率平均值為224%，拉伸強度平均值為2.60MPa，彈性較差，硬度較高。
廣州某大廈，建于2000年，玻璃幕墻和鋁板幕墻已服役22年，調(diào)研結(jié)果:玻璃幕墻耐候密封膠輕微老化，硬度在4858之間。鋁板幕墻耐候密封膠嚴重老化，彈性差，硬度在6175之間，部分出現(xiàn)開裂，導(dǎo)致漏水。
廣州某廣場，建于2003年，鋁板幕墻已服役19年，調(diào)研時發(fā)現(xiàn)耐候密封膠硬度在40左右，彈性良好，但少部分膠縫存在脫粘情況。經(jīng)查看，MS密封膠與基材脫粘位置較整齊，基材表面未粘有密封膠，較大概率是施工時接縫清潔不充分。
總體而言，經(jīng)過多年的服役，大多數(shù)項目的MS密封膠沒有出現(xiàn)老化現(xiàn)象，仍具有優(yōu)異的耐候性能;部分項目MS密封膠存在硬度上升、彈性下降、耐久性能欠佳的情況;也有少部分項目存在因施工問題、MS密封膠耐老化性能差引起的脫粘、開裂、漏水情況。取樣檢測結(jié)果表明，經(jīng)過十幾年、20年甚至25年的服役，優(yōu)質(zhì)的MS密封膠仍具有優(yōu)異的彈性，仍然可以滿足幕墻的耐候性能要求，能夠持續(xù)長久保障幕墻防水和密封。http://www.cs535.com/
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