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裝配式建筑MS密封膠的外墻防水設計與材料應用
- 發(fā)布時間 : 2024-9-6 16:43:02
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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.
裝配式建筑MS密封膠的外墻防水設計與材料應用
(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 : 2024-9-6 16:43:02
- Views:
外墻水平接縫的防水,宜在內外側設置兩道材料防水,并加一道結構防水。外墻板內高外低的企口構造,可防止外側的防水材料遭到破壞時水進入室內;由此形成的空腔,也有利于滲入的水流向垂直處的排水口,外墻垂直接縫的防水宜采用兩道密封,在中間設置空腔,并每隔3一4層設計排水口,如圖3所示。即在墻的室內側與室外側均設計密封材料作防水。外側防水是耐候性密封,主要作用是防止紫外線、雨雪等氣候因素的影響。內側防水是二道防水,阻隔突破一道密封的外界水汽與內側發(fā)生交換,同時也可防止室內由于裝修等原因造成的水流入接縫,造成漏水。內側防水由于不直接暴露,受到保護,其耐久性更好。
目前常用的建筑MS密封膠有硅酮(SR)MS密封膠、聚氨(PU)MS密封膠和硅烷改性(如MS)MS密封膠等,基本結構如圖4所示。硅酮(SR)MS密封膠以線性聚硅氧烷為主原料,固化過程中與交聯(lián)劑反應形成網狀的S i-O-S i骨架結構,因而先天具有優(yōu)異的耐候性,是玻璃幕墻密封的首選材料;缺點是表面不可涂飾、易污染基材,影響工程美觀度,同時常規(guī)硅酮(SR)MS密封膠對預制混凝土的粘接不佳,時間長界面易開裂導致漏水。聚氨酷(PU)MS密封膠以聚氨酷預聚體為主要成分制成,其主鏈以C-O和N-C為主,具有表面可涂飾、對基材無污染、與混凝土粘結良好等特點;缺點是耐老化性能相對較差,固化易起泡,而基于甲苯二異氰酸醋(TDI,毒性大)體系的低模量產品,含有游離異氰酸醋(-NCO)和苯類溶劑,對環(huán)境及人體危害較大。硅烷改性(如MS)MS密封膠以端硅烷封端聚醚為基礎樹脂制備,主鏈由C-O, C-C和S i-O-S i鍵組成,具有極低VOC(揮發(fā)性有機化合物)、無增塑劑遷移、固化不產生氣泡、表面可涂飾、對基材無污染腐蝕等特點,不足的是耐老化和耐光性性能雖優(yōu)但不及SRMS密封膠,需要通過添加助劑來提升相應性能,同時大部分的硅烷改性聚合物生產技術被國外少數(shù)幾家公司掌握,聚合物材料價格偏高。http://www.ruilingxiang.cn/
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