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为了研究半刚性基层材料的模量特性,应用UTM材料试验机测试了3种水泥剂量的半刚性基层材料(CBG-25)在抗压和弯拉模式下的动、静态模量和相位角,分析水泥剂量、应力水平、频率、测试方法对半刚性基层材料模量和相位角的影响。结果表明:半刚性基层材料在抗压和弯拉模式下具有不同的应力依赖特性,随着应力水平的增加,抗压模量逐渐增大而弯拉模量逐渐减小;相位角随着加载频率的增加逐渐减小,抗压模式相位角为3.0°~7.2°,弯拉模式相位角为5.0°~7.1°;动态抗压模量为静态抗压模量的1.8~2.8倍,动态弯拉模量为静态弯拉模量的1.2~1.4倍,弯拉模量远大于抗压模量;顶面法动态抗压模量与侧面法动态抗压模量数值相当,顶面法抗压相位角大于侧面法抗压相位角;半刚性材料的强度和模量随着水泥剂量的提升而逐渐增大,而相位角呈逐渐减小趋势。
In order to study the modulus properties of semi-rigid base material, the dynamic and static modulus and phase angle of semi-rigid base material (CBG-25) with three kinds of cement dosage under compression and bending mode were tested by UTM material testing machine. The effects of cement dose, stress level, frequency and test method on modulus and phase angle of semi-rigid base material were analyzed. The results show that the semi-rigid base material has different stress-dependent properties in compressive and flexural modes. As the stress level increases, the compressive modulus gradually increases and the flexural modulus decreases gradually. The phase angle increases with the increase of stress The phase angle of the compression mode is 3.0 ° -7.2 ° and the phase angle of the bending mode is 5.0 ° -7.1 °; the dynamic compressive modulus is 1.8-2.8 times that of the static compressive modulus, and the dynamic bending The tensile modulus is 1.2-1.4 times that of the static flexural modulus, and the flexural modulus is much larger than the compressive modulus. The dynamic compressive modulus of the top surface method is equivalent to that of the side surface dynamic compressive modulus, The phase angle is larger than the compressive phase angle of the side method. The strength and modulus of the semi-rigid material increase with the increase of the cement dosage, while the phase angle decreases gradually.