摘要
镁质抗裂剂水化产生的氢氧化镁晶体吸水膨胀、生长,能够有效的中和大体积混凝土内部拉应力,从而提升混凝土稳定性,降低养护成本,减少或杜绝裂缝的产生。为保障城市轨道交通工程安全性、耐久性和经济效益,开展了一系列针对地铁衬砌混凝土抗裂性能的研究,并将研究成果应用到青岛地铁的建设工程中。
Magnesium hydroxide crystal produced by hydration of magnesia anti-cracking agent can effectively neutralize the internal tensile stress of large volume concrete, thereby improving the stability of concrete, reducing maintenance costs , reducing or eliminating cracks. In order to ensure the safety, durability and economic benefits of urban rail transit project, a series of studies on crack resistance of concrete lining of Metro were carried out, and the research results were applied to the construction of Qingdao metro.
作者
岳阳
YUE Yang(Qingdao Metro Line 1 Co.,Ltd.,Shandong Qingdao 266000 China)
关键词
城市轨道交通
地铁
混凝土
镁质抗裂剂
urban rail transit
metro
concrete
magnesiananti-crackingagent
