LI Guang, MA Fengshan, XU Peihua. 2019: EXPERIMENTAL STUDY ON PROPERTY OF DYNAMIC SIMILAR MATERIAL MADE OF DIFFERENT RAW MATERIALS. JOURNAL OF ENGINEERING GEOLOGY, 27(3): 676-681. DOI: 10.13544/j.cnki.jeg.2018-107
    Citation: LI Guang, MA Fengshan, XU Peihua. 2019: EXPERIMENTAL STUDY ON PROPERTY OF DYNAMIC SIMILAR MATERIAL MADE OF DIFFERENT RAW MATERIALS. JOURNAL OF ENGINEERING GEOLOGY, 27(3): 676-681. DOI: 10.13544/j.cnki.jeg.2018-107

    EXPERIMENTAL STUDY ON PROPERTY OF DYNAMIC SIMILAR MATERIAL MADE OF DIFFERENT RAW MATERIALS

    • With the development of dynamic model test such as centrifuge and shaking table, the requirement for dynamic similar material is more detailed. On the basis of dynamic similitude theory of model test, how to select the ratio of raw materials accurately plays an important role in the model test. This paper selects river sand with different particle gradations, iron powder, barite powder and mica sheet as the raw materials, and jet cement as the cementing agent. It then studies the physical and mechanical property of the similar materials with the elastic wave speed simulation measurement and uniaxial compressive test. The results show the follows. (1)The density, dynamic and static elasticity modulus of the specimens with better particle gradation are bigger and the sand-blinder ratio has a greater influence on the density of similar material as the gap gradation enlarges. (2)The dynamic similar material can be obtained whose density is between 1.5-2.2g·cm-3, dynamic Poisson's ratio is between 0.2-0.4 and dynamic elasticity modulus is between 2.5-5.5Gpa if we choose the river sand as aggregate and cement as cementing agent. (3)Iron powder has better effect on gaining weight than the barite powder. The dynamic and static elasticity modulus of the barite specimen have no obvious changes with the change of barite powder content. Therefore, barite powder is an ideal raw material to make dynamic similar material with high-density and low-strength. (4)With the increase of mica sheet content, the dynamic Poisson's ratio, dynamic and static elasticity modulus of specimen can reduce evidently. As a result, the mica sheet is not suitable for similar material with high density but it can make similar material of weak intercalation or structural plane.
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