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混凝土外加剂国家标准已于1986年10月审议通过,并将由国家标准局颁布实施。这次审议通过的共有三个国家标准,即《混凝土外加剂的分类、命名与定义》、《混凝土外加剂匀质性试验方法》和《混凝土外加剂标准》。1.混凝土外加剂分类、命名与定义该标准规定凡符合定义的一种产品归属于标准中的某一类。该标准也适用于砂浆和净浆用外加剂.外加剂的命名是依据其主要功能为原则。具有一种以上功能者,按一种以上功能命名。该标准系参照国际标准(草案)ISO/DIS 7690《混凝土、砂浆及灌注用薄浆——外加剂的定义及分类》制定的。该标准将外加剂按其功能分为四类:改善混凝土拌和物流变性能的外加剂,调节混凝土凝结硬化
The national standards for concrete admixtures were reviewed and passed in October 1986 and will be promulgated and implemented by the National Bureau of Standards. The three national standards adopted in this review and deliberation are “Classification, nomenclature and definition of concrete admixture”, “Test method for homogeneity of concrete admixture” and “Standard for concrete admixture”. 1. Classification, nomenclature and definition of concrete admixtures This standard specifies that a product that meets the definition falls into one of the categories. The standard also applies to additives used in mortars and pastes. The name of the additive is based on the principle of its main function. Those who have more than one function are named after more than one function. The standard is based on the international standard (draft) ISO/DIS 7690 “Concrete, mortar and grout - Admixture definition and classification”. The standard classifies admixtures into four categories according to their functions: admixtures to improve the performance of concrete mixing and regulating the coagulation and hardening of concrete