近几年来,随着建筑技术的发展,混凝土外加剂也得到了发展。其中超缓凝剂(后文简称SR)的开发,又对建筑技术的发展起了推动作用。所谓超缓凝剂,是一种在调节其适当掺量下可使混凝土的凝结、硬化时间延迟几小时到几天,而且对其以后的强度增长没有不良影响的非引气性外加剂(若具有减水性时则可称为减水性超缓凝剂)。因此,利用这种超缓凝特性在用滑模法等施工钢筋混凝土结构物时,就能够保证,所浇灌的新老混凝土之间形成整体;对于在夏季或热带地区由于受温度影响而造成的混凝土的坍落度损失可得 In recent years, with the development of building technology, concrete admixtures have also been developed. The development of super retarder (hereinafter referred to as SR) has also promoted the development of construction technology. The so-called super retarder is a non-air-entraining admixture that can delay the coagulation and hardening time of concrete by a few hours to several days, and has no adverse effect on the subsequent strength increase if it is adjusted to a suitable amount. With water reduction, it can be called water-reducing super retarder). Therefore, using this kind of ultra-relaxation property when constructing a reinforced concrete structure using a slipform method or the like, it is possible to ensure that the old and new concrete being poured form an integral whole; for the summer or in the tropics due to the influence of temperature Slump loss of concrete is available