高强混凝土用减水剂—麦地150

• 作 者: 董瑞新
• 出 处: 建筑技术
• 发表日期: 1978年04期
• 关键词: 减水剂 减水作用 磺酸盐 烷基 表面活性 高强混凝土 芳香基 外加剂 木质素 表面张力

一、特征麦地系烷基芳香基磺酸盐,它的特征是较木质素系的水泥减水剂具有更大的水泥减水性,同时不会使表面张力(所谓表面活性)降低,因而对于混凝土的加气量极少。毒气很小,使用安全。它的缓凝性也很小,即使多量掺加也不会发生不硬化现象。具有耐热性。由于它不含有氯化钙等有害物质,故不会使预应力钢筋生锈。二、作用麦地150的主要成分是阴离子表面活性剂的烷基芳香基磺酸盐。一般的外加剂依靠以下两个效应起着减水作用。

I. Characteristics Wheat is an alkyl aryl sulfonate, which is characterized by a greater water-reducing effect of cement than a lignin-based cement water-reducing agent, and does not reduce surface tension (so-called surface activity). The amount of concrete added is very small. The gas is small and safe to use. Its retardation is also very small, and even if it is mixed in a large amount, no hardening phenomenon will occur. With heat resistance. Since it does not contain harmful substances such as calcium chloride, it does not rust the prestressed steel bars. Second, the main component of the role of wheat 150 is an anionic surfactant alkyl aryl sulfonate. General admixtures rely on the following two effects for water reduction.