混凝土碱-骨料反应分析

Analysis on Reaction of Concrete Alkali-Aggregate

当水泥中的碱与其活性骨料发生化学反应时,会引起混凝土的不均匀膨胀,导致开裂破坏。碱活性反应具有缓慢、持续时间长的特征,在选用骨料时,必须严格控制活性骨料的使用。鉴于碱-骨料反应的复杂性,为了确保混凝土的耐久性和使用安全,需要严格控制水泥的含碱量。

When the alkali and its active aggregate of cement produce chemical reaction, it will cause uneven expansion of concrete.The alkali active reaction has the characteristics of slow and long duration.It should strictly control the use of active aggregate as it is selected.Whereas the complexity of alkali-aggregate reaction and in order to guarantee the durability and use security of concrete,it should strictly control the alkali content of cement.