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有人了解岩棉装饰板性能怎样吗

有人了解岩棉装饰板性能怎样吗

浏览：40次 | 提问时间： 06-29 09:49

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你贱的太过耀眼 06-29 09:50

岩棉板是以玄武岩为主要原材料，经高温熔融加工而成的无机纤维板。岩棉板又称山东地平线岩棉保温装饰板。作型建筑类用品有：保温、隔燃、吸声特、点质量轻、导热系数小、吸热、防火特点。岩棉原材料采用天然的火山岩石,是不燃性建筑材料防火材料。岩棉价格已由42元/平方米左右飙升至200多元/平方米。即便如此，市场需求仍然供不应求。

懵哒哒 06-29 09:58

岩棉是由玄武岩等矿物质经高温提炼而成，可用于管道等保温。岩棉自身防火性能好，但是吸水量高，不适用于潮湿环境，即便是在干燥环境中，岩棉也极易捕捉空气中的水份，形成蓄水层，造成岩棉受重脱落。因岩棉极易挥发且具有刺激性，早在几年前岩棉还被国际卫生组织列为二类致癌物质。为解决岩棉的吸水问题，人为在岩棉里添加防水剂，形成憎水岩棉。憎水岩棉对岩棉的吸水起到了一定的控制作用，但是由于岩棉本身质地酥松，大量的绒孔还是会形成积水腔，所以不能从根本上杜绝岩棉吸水。由于憎水剂不喜水、油、胶等液态物质，所以憎水岩棉不适用于胶粘使用，所有岩棉保温的正统做法是铝箔包裹，机械锚固，但是其牢固程度无法保证，只能作为幕墙内衬使用。岩棉的导热系数较低，一般在005以上，综合其易吸水，上墙不牢等问题，很多地区已经禁止岩棉作为普通外墙保温材料的应用，只用于幕墙等带有腔体外围护结构的内衬使用。而不作为单独的外围护层使用。岩棉保温装饰板是2011年以后一些厂家为迎合防火的要求而推出的所谓新产品。由于岩棉保温装饰板的保温层为岩棉，所以注定了其结构必定为三层结构，面材(水泥板或其它)、岩棉、水泥板，连接方式为胶粘。由于憎水岩棉不喜水、胶等特性，所以岩棉保温装饰板所使用岩棉一定为普通岩棉。岩棉本身是多绒孔酥松结构，对胶等粘结物质的粘结效果无法保证，而酥松的结构对保温装饰板的正反面无法起到有效的连接，其拉拔强度无法保证，尤其在外饰面为石材等重饰面的情况下，其有效胶粘及拉拔强度大幅下降，应用危险系数急剧增加。另外由于岩棉的质地酥松，其保温装饰板的板面平整度无法保证。重压下其厚度会缩小，反之则会膨胀。岩棉保温装饰板内侧使用水泥板作为与墙体粘结层，水泥板自身具有高吸水性和高膨胀率。保温装饰板一般都是采取粘锚方式安装，以聚合物砂浆为粘结剂，聚合物砂浆为水化反应，通过缓慢吸收水份达到粘结的效果，而水泥板的高吸水特性会在粘结过程中迅速把聚合物砂浆中的水份吸干，使聚合物砂浆失去粘结效果，另外水泥板吸水后会膨胀变形，即改变了和岩棉的粘结结构也改变了和墙体的粘接结构，使整个岩棉保温装饰板的性能发生变化。水泥板在干燥的过程中会随着水份的流失收缩变形，岩棉保温装饰板的性能结构再次发生变化，而变化会随着环境的改变周而复始，直至脱落。

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