Application of ultrasonic in strength measurement of similar materials of limestone
Application of ultrasonic in strength measurement of similar materials of limestone
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DOI：
10.1007/s11771-005-0391-4
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发表时间：
2005-10
影响因子：
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通讯作者：
T. Liu;Zhen-bin Peng;Jin-tian Han
中科院分区：
文献类型：
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作者：
T. Liu;Zhen-bin Peng;Jin-tian Han
水泥、石膏和砂等类似材料可用于模拟石灰岩特性。在室内小样本配比试验的基础上，选择了一系列合理配比进行岩溶顶板相似试验。应用超声波技术，用声波仪检测了相似试样的横波速度和纵波速度。得出了试样的动弹性模量和泊松比。根据试验数据，分析了混凝土的横波速度与竖向波速、抗压强度与抗折强度之间的关系。研究表明，垂直波速比横波波速更能反映相似材料的抗压强度和抗弯强度。竖向波速随强度和动弹性模量的增大而增大。
Similar materials such as cement, gypsum and sand are options for simulating limestone characteristic. A series of reasonable proportions are chosen to do similar experiments of Karst roof based on the proportions testing of small samples indoors. Applying on ultrasonic, the velocities of transverse wave and vertical wave of similar samples have been inspected with the sound wave instrument. Dynamic modulus of elasticity and Poisson’s ratio of the samples have been educed. According to the testing data, the relationship between the transverse wave and vertical wave velocity, compressive strength and anti-bend strength are analyzed. It has been proved that the vertical wave velocity is better for reflecting compressive strength and anti-bend strength of similar materials than the transverse wave velocity. The vertical wave velocity increases with the strength and dynamic modulus of elasticity.