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一、混凝土外加剂的概况 1980年在挪威召开的国际“混凝土生产及质量控制”第六次会议上通过了一个混凝土外加剂的国际标准,在这个标准中给外加剂下了定义:“在混凝土、砂浆或净浆拌和时、拌和前或额外拌和工序中掺入的,掺量小于或等于水泥重量5％(特殊情况除外)的,并能对混凝土、砂浆或净浆的正常性能按要求改性的一种产品”。在混凝土中掺入外加剂是提高混凝土强度和改善混凝土各种性能的有效而简便的方
I. Overview of concrete admixtures At the sixth meeting of the International “Concrete Production and Quality Control” held in Norway in 1980, an international standard for concrete admixtures was adopted, in which the admixture was defined: “In concrete , when the mortar or slurry is mixed, before the mixing or in the additional mixing process, the amount is less than or equal to 5% of the cement weight (except in special cases), and the normal performance of the concrete, mortar or paste can be changed as required. A product of sex." Adding admixtures to concrete is an effective and simple way to increase concrete strength and improve various properties of concrete.