废弃水泥混凝土再生集料在配制混凝土或采用无机结合料稳定做基层材料时 ,存在明显的需水量改变的问题。通过试验和分析认为 ,需水量的改变一是再生集料配制混凝土时要额外吸收一定的水分 ,二是因为水泥稳定基层材料在击实时将再生集料中原有的结晶水成分累加造成的 Abandoned cement concrete recycled aggregates in the preparation of concrete or inorganic binder stable as the primary material, there is a clear water demand changes. Through the experiment and analysis, the change of water demand is that the recycled aggregate should absorb some water when it is used to prepare concrete, and the other reason is that when the cement stabilized base material accumulates the original crystal water in the recycled aggregates during compaction