混合结构的一个突出问题是混凝土有徐变收缩的性质，而钢无此性质。
A noticeable problem of this structure system is that concrete has the characteristics of creep and shrinkage while steel hasn't.
此外，研究还证明无碱矿物激发剂具有水化膨胀性，它在一定 程度上能改善混凝土的 收缩。
Furthermore, the shrinkage of concrete is improved by the proven hydro-expansive property of mineral activator.
超长混凝土结构的设计和施工中可以采取设置后浇带、采用微膨胀——补偿收缩混凝土或设计无粘结预应力混凝士结构来防止温度收缩裂缝的产生。
The designer can set post-pouring belt, using UEA con- crete and designing pre-stressing concrete structure to avoid the crack caused by temperature and shrinkage.
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