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一、概述“高效能减水剂”在欧美国家也是属于新兴的化学外加剂,国际上还没有明确的术语和定义。 最早使用高效能减水剂的国家是日本和西德。欧洲各国在西德影响下,也开始使用高效能减水剂制造流化混凝土。北美使用高效能减水剂的时间较晚,它在西德和日本的影响下,首先用在高强混凝土中制造预制混凝土构件。1978年在加拿大召开第
I. Overview “High-efficiency water-reducing agent” is also an emerging chemical admixture in Europe and the United States. There are no clear terms and definitions in the world. The earliest countries that used high performance water reducers were Japan and West Germany. Under the influence of West Germany, European countries also began to use high-efficiency water-reducing agents to make fluidized concrete. The use of high-performance water-reducing agents in North America is relatively late. Under the influence of West Germany and Japan, it was first used to manufacture precast concrete components in high-strength concrete. 1978 held in Canada