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青藏铁路由于沿线的气候条件复杂,成为我国乃至世界上建设难度最大的重大工程,在这样的区域修建铁路,具有很强的探索性和科研性。青藏铁路建设中混凝土的耐久性问题也一直是被铁道部、青藏总指挥部高度重视的技术问题之一。碱—集料反应(Alkali-Aggregate Reaction,简称AAR)是混凝土耐久性的一个重要方面,是影响重点工程混凝土安全性的病害之一。在钢筋锈蚀、冻融循环和碱一集料反应三大病害中,碱—集料反应是能够加以控制,而付出经济代价最小的一种破坏因
Due to the complex climatic conditions along the Qinghai-Tibet Railway, it has become the most difficult major construction project in our country and even in the world. It is of great exploratory and scientific significance to build railways in such areas. The durability of concrete in the construction of the Qinghai-Tibet Railway has also been one of the technical issues that have been highly valued by the Ministry of Railways and the Qinghai-Tibet General Command. Alkali-Aggregate Reaction (AAR) is an important aspect of concrete durability and is one of the diseases that affect the safety of key projects. In the steel corrosion, freeze-thaw cycle and alkali-aggregate reaction of the three major diseases, alkali-aggregate reaction is able to be controlled, and pay the smallest economic cost of a destructive