混凝土化学外加剂的研究与应用——早强剂 加气剂 早强加气剂

• 机 构: 铁道部第三工程局,铁道部第四工程局,铁道部科学研究院,大桥局桥梁研究所
• 出 处: 桥梁建设
• 发表日期: 1976年04期
• 关键词: 加气剂 混凝土 早强 早强剂 水灰比 泵送混凝土施工 混凝 混凝土工作性能 混凝土数量 混凝土性能

在铁道基本建设中,混凝土数量每年达数百万立方。由于新结构、新工艺和新技术的发展,对混凝土性能要求越来越高。例如,为适应冬季(低温)施工、快速施工、滑升模板和加速模板周转等,需要混凝土具有快硬早强特性;为适应水下混凝土灌注、泵送混凝土施工及级配不良的粗细骨料,需要改善混凝土工作性能;为适

In the railway infrastructure, the number of concrete reaches millions of cubic meters each year. Due to the development of new structures, new processes and new technologies, the performance requirements of concrete are getting higher and higher. For example, to meet the requirements of winter (low temperature) construction, rapid construction, sliding formwork and accelerated formwork turnover, it is necessary for concrete to have fast hardening and early strength properties. In order to adapt to underwater concrete pouring, pumping concrete construction and poor graded aggregate , Need to improve the performance of concrete work;