白云岩石粉含量对碾压混凝土力学性能影响研究

Study on the Influence of Dolomite Powder Content on Mechanical Properties for Roller Compacted Concrete

进行不同白云岩石粉含量的碾压混凝土力学性能试验研究,基于试验结果,讨论了粉含量对碾压混凝土抗压强度、抗折强度和劈拉强度的影响规律。结果表明:白云岩石粉含量对碾压混凝土抗压强度影响显著,最优石粉含量范围为23. 6%～25. 6%;石粉含量对抗折强度的影响不明显。对于劈拉强度,龄期为28d的碾压混凝土白云岩石粉较优含量范围为20. 6%～22. 6%,龄期为90d的碾压混凝土白云岩石粉较优含量范围为22. 6%～24. 6%。

This study carried out the mechanical properties experiments under different stone powder contents. Based on the experimental results,influences of stone powder contents on compressive strength,flexural strength and splitting tensile strength of roller compacted concrete were discussed. Results show that the dolomite powder content has an obvious influence on the compressive strength,and has an optimal range( 23. 6% ~ 25. 6%). Moreover,the dolomite stone powder content has no obvious influence on the flexural strength. For splitting tensile strength,an optimal range( 20. 6% ~ 22. 6%) of dolomite stone powder for roller compacted concrete at the age of 28 d. Roller compacted concrete at the age( 22. 6% ~ 24. 6%) of 90 d has an optimal range of dolomite stone powder content.