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北京饭店新楼工程外饰面的冬季施工,需要一种用于抹灰砂浆不析盐,用于镶贴有连接铁件的预制饰面板的灌浆砂浆不锈蚀铁件的抗冻剂。为此,我们组成了“三结合”试验小组,于某冷库进行了探索试验。根据探索试验结果,决定采用亚硝酸钠作为抹灰和灌浆砂浆抗冻剂,在北京饭店工程进行了较大面积的施工实践,同时在自然条件下作了较系统的抗冻强度对比试验。一、抗冻剂的选择根据有关资料介绍和以前的初步探索,
In the winter construction of the exterior decoration of the Beijing Hotel New Building Project, there is a need for an anti-freezing agent for grouting mortar that does not precipitate salt and is used for grouting mortar affixed with prefabricated veneer panels attached to iron pieces. To this end, we formed a “three-combination” experimental group and conducted exploration experiments in a cold storehouse. According to the results of exploration and experimentation, it was decided to use sodium nitrite as a render and mortar antifreeze, and a large-area construction practice was carried out in the Beijing Hotel Project. At the same time, comparatively systematic freeze resistance strength tests were conducted under natural conditions. I. Selection of antifreeze agents Based on relevant information and previous preliminary explorations,