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丁基防水嵌縫膠材料的選擇及工藝流程的確定
用于鋼結(jié)構(gòu)橋梁的丁基防水嵌縫膠
- 發(fā)布時(shí)間 : 2025-1-15 12:49:57
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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.
用于鋼結(jié)構(gòu)橋梁的丁基防水嵌縫膠
(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(shí)間 : 2025-1-15 12:49:57
- Views:
目前用于鋼橋梁的丁基防水嵌縫膠主要包含兩種:一種是用于鋼結(jié)構(gòu)橋面防水粘接層的丁基防水嵌縫膠;另一種是用于鋼索以及鋼橋局部密封的丁基防水嵌縫膠;鋼結(jié)構(gòu)橋面鋪裝丁基防水嵌縫膠橋梁為各種車輛行駛提供了承重和耐久的橋面,而橋面鋪裝直接關(guān)系到整座橋的安危和長(zhǎng)期使用壽命,橋梁長(zhǎng)期使用性和安全性的保障是與科學(xué)合理的橋面鋪裝體系息息相關(guān)的。鋼橋面鋪裝是在鋼橋面板上刷一層防水粘接層,確定鋪裝層和鋼橋面板有良好的粘接及防水性,然后鋪裝單層或多層的其他材料,最后形成鋪裝層。橋面鋪裝的好壞主要取決于防水粘接層,形成整體橋面鋪裝裝置的關(guān)鍵是防水粘接層的防水性和粘接性。若鋼橋面板防水粘接層的防水處理不當(dāng),雨水就會(huì)通過鋪裝層滲透到鋼橋面板,不僅會(huì)使粘接層膠的粘接失效,而且還會(huì)浸蝕橋面板和橋梁結(jié)構(gòu)材料,從而造成鋼橋梁的銹蝕。因此防水粘接性能的好壞對(duì)鋼橋耐久性及安全性有著直接影響。目前防水粘接層所用到的材料可分為4類:甲基丙烯酸醋防水材料、環(huán)氧樹脂材料、環(huán)氧瀝青材料及溶劑型粘接劑材料。上述防水材料中用的最多最廣的丁基防水嵌縫膠是丙烯酸丁基防水嵌縫膠和環(huán)氧樹脂丁基防水嵌縫膠。為了更直觀地看到丁基防水嵌縫膠在鋼橋的鋪裝,如圖1、圖2所示。
丙烯酸防腐底漆、甲基丙烯酸甲醋(MMA)防水膜和丙烯酸丁基防水嵌縫膠三種物質(zhì)組成了甲基丙烯酸醋防水體系材料。施工時(shí)將丙烯酸丁基防水嵌縫膠直接噴涂在MMA防水膜上,固化后形成一個(gè)封閉的整體體系,從而達(dá)到防水效果。溶液型丙烯酸醋丁基防水嵌縫膠是甲基丙烯酸醋防水材料體系中常用的丁基防水嵌縫膠,其可分為兩種:一種是將聚合物直接溶解稀釋配成一定比例的丁基防水嵌縫膠溶液,可進(jìn)行手工涂抹也可以進(jìn)行噴涂的方式進(jìn)行涂膠;另一種是以丙烯酸醋為原料進(jìn)行溶液聚合反應(yīng)制成的丁基防水嵌縫膠,然后直接使用。根據(jù)聚合物反應(yīng)的單體組分不同,可將溶液型丙烯酸醋丁基防水嵌縫膠分為單組分、雙組份和多組分膠粘劑3種類型。單組分丁基防水嵌縫膠常使用是氰基丙烯酸醋類的單體,根據(jù)官能團(tuán)不同可有氰基丙烯酸甲醋,氰基丙烯酸乙醋 ,氰基丙烯酸丙醋,氰基丙烯酸丁醋,氰基丙烯酸環(huán)己醋和氰基丙烯酸異戊醋等。隨著官能團(tuán)分子量的增加,合成的膠的韌性、耐濕性就越好,但粘接強(qiáng)度發(fā)反而下降。http://www.www.sunsage.net/
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