粉煤灰的动剪切模量 English Version
Dynamic Shear Moduli of Flyashes
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摘要: 笔者在自振柱仪上研究了国内三个电厂的粉煤灰动剪切模量特性。研究结果发现:动剪切模量随周围有效应力的增加而增加,随孔隙比的增加而减少。颗粒的尺寸、级配和表面形状也将影响剪切模量值。饱和度的变化将导致动剪切模量的改变。通过比较还发现:在相同相对密度的条件下,粉煤灰的动剪切模量约为砂土动剪切模量的30~60%。根据比较的结果我们认为,粉煤灰很有可能成为较好的地基隔震材料。Abstract: Flyashes from three power plants of China were studied with Free Vibration Test System. It is found that the dynamic shear moduli increase as confining pressure increases and decrease as viod ratio increases. The size grade and appearance of grain will also influence the shear moduli. The change of the degree of saturation will cause the change of dynamic shear moduli. By comparision, it is shown that dynamic shear moduli of flyashes are about 30~60% moduli of sand at same relative density.According to the comparison and analysis, we can infer that flyashes will most likely be effective isolation materials in ground.
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