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一般的水中混凝土在施工中由于受到环境水的扰动、稀释和浸渍,使水泥大量流失,混凝土各种颗粒分离,使混凝土的品质降低,水质污染。上海建材学院在西德开发的水中抗分离混凝土(简称SC混凝土)的基础上研制出SC混凝土的配方并对性能进行了测试。配制SC混凝土的技术关键是在普通混凝土中掺加水中抗分离剂,以增加混凝土的粘稠性。最常用的是纤维素类(简称CA)。这种水溶性纤维素具有界面活性,会引入粗大的气泡而增加混凝土的含气量,所以应加入适量消
The general underwater concrete suffers from the disturbance, dilution and impregnation of the environmental water during the construction, so that a large amount of cement is lost, and various concrete particles are separated, so that the quality of the concrete is reduced and the water quality is polluted. Shanghai Institute of Building Materials developed the formula of SC concrete and tested its performance on the basis of water-resistant anti-segregation concrete (SC concrete) developed in West Germany. The key to preparing SC concrete is to add anti-sedimentation agent in water to increase the viscousness of concrete. The most commonly used is cellulose (CA). This water-soluble cellulose has interfacial activity and will introduce coarse bubbles and increase the gas content of concrete, so it should be added