粉煤灰对碾压混凝土抗冻耐久性影响的研究

Study about Influence of Flyash on Frost-resisting Durability of Roller Compacted Concrete

通过分析粉煤灰对碾压混凝土抗冻耐久性影响的试验研究成果，指出了粉煤灰质量和掺量是影响碾压混凝土抗冻耐久性的重要因素．在按照规范要求严格控制混凝土的水灰比的前提下，通过选择适宜的粉煤灰质量、掺量和混凝土的含气量，可以生产出适合于我国北方寒冷地区和大坝水位变化区的碾压混凝土．这有利于进一步拓宽碾压混凝土的应用范围和加快我国水利水电建设步伐．

Analyzing the result of test research of influence of flyash on frost-resisting dura-bility of roller compacted concrete,the writer,pointed it out that the quality of flyash and mixamount are important factors influenecing of frost-resisting durability of roller compactedconcrete. Under the condition of strictly controlling the ration of water and cement accordingthe requirement of relevant regulation, selected a kind of flyash which has good quality,ap-propriate mix amount and air content of concrete,a special kind of roller compacted concretecan be made,and it can be used in zones of dams in which the writer level change,and innorth cold areas.