一、概述掺外加剂是混凝土冬期施工的一种行之有效的方法,它具有节约能源、施工设备简单、操作方便、综合造价低等优点,是目前施工单位常采用的方法。在混凝土冬期施工中用得较多的是防冻剂、阻锈剂和早强剂。目前在“三北”地区不同程度的应用中,收到了明显的效果。但由于外加剂的品种繁多,厂家生产条件不一,在尚无统一标准和技术规程的情况下,冬期施工混凝土外加剂的掺用尤其应持积极又 I. Overview Admixture admixtures are an effective method for winter concrete construction. It has the advantages of energy conservation, simple construction equipment, convenient operation, and low overall cost. It is a method commonly used by construction units. In the winter construction of concrete is more commonly used antifreeze, rust inhibitor and early strength agent. At present, in the application of different degrees in the “Three North” region, obvious results have been received. However, due to the wide variety of admixtures, manufacturers have different production conditions. In the absence of uniform standards and technical regulations, the admixture of concrete admixtures for winter construction should be particularly active.