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各位代表: 混凝土减水剂又称水泥分散剂,是目前工业发达国家在混凝土和水泥制品生产中普遍应用的一种化学外加剂。由于它掺入新拌混凝土混合物中能使水泥颗粒起扩散作用,把水泥凝聚体中包含的水释放出来,从而改善混凝土的密实度和强度,因而在混凝土和水泥制品生产中应用混凝土减水剂可以提高产品质量,节省水泥和能源,改善工艺和劳动条件。国际上混凝土减水剂的发展已有几十年的历史。1935年,美国研制成功以木质素磺酸盐为主要成分的减水剂。本世纪六十年代初期,日本、西德分别研制成功以β-萘磺酸甲醛缩合物为主要成分
Delegates: Concrete water reducer, also known as cement dispersant, is a chemical admixture commonly used by industrialized countries in the production of concrete and cement products. Since it is incorporated into the fresh concrete mixture, the cement particles can diffuse, and the water contained in the cement aggregate is released to improve the compactness and strength of the concrete. Therefore, the concrete water reducer is used in the production of concrete and cement products. It can improve product quality, save cement and energy, improve process and working conditions. The international development of concrete water-reducing agent has a history of several decades. In 1935, the United States successfully developed a water reducing agent based on lignosulfonate. In the early 1960s, Japan and West Germany successfully developed β-naphthalenesulfonic acid formaldehyde condensates as their main components.