Nano-impression test-based test method for determining macroscopic mechanic properties of granite

Abstract

The invention discloses a nano-impression test-based test method for determining the macroscopic mechanic properties of granite. The method comprises the following steps: carrying out high temperature treatment on a granite sample at a preset temperature, carrying out X-ray diffraction test, analyzing mineral components and the change of the mineral components with the temperature, using a nano-impression tester to measure all mineral mechanical properties and the change of the mechanical properties with the high temperature treatment at different preset temperatures, analyzing the influences of the microscopic mechanic properties of all minerals on the granite, obtaining the macroscopic mechanic properties of the granite by using the measured mineral mechanical properties and equalization method analysis, and compared with the obtained macroscopic mechanic properties with mechanical properties obtained through traditional mechanical test. The method provides a supplement for the macroscopic characteristics of the granite, provides a technical support for engineering practices, makes the macroscopic properties maximally approach practical engineering conditions, and provides reliable data guarantee for the safety of an engineering structure.

Description

technical field [0001] The invention belongs to the field of granite mechanical test, and particularly relates to a test method for measuring macroscopic mechanical properties of granite based on a nano-indentation test. Background technique [0002] In recent years, with the rapid development of my country's economy and society, the improvement of people's living standards and the enhancement of environmental protection awareness, especially the demand for clean energy continues to increase. Energy issues are related to national security and development strategy, and environmental issues are related to the health and safety of citizens. The development of nuclear energy, a relatively clean energy source, has become one of the effective means to solve energy and environment issues. However, as a major country in the nuclear industry, a large number of high-level radioactive wastes produced by nuclear power plants, national defense, scientific research, etc. have the characte...

AI Technical Summary

Problems solved by technology

Although this method is simple in principle and easy to operate, it ignores the influence of the micro-mechanical properties of the minerals in the granite on the granite; when conducting the nano-indentation test experiment, it does not consider pressing the indentation point to the mineral area, and the micro-mechanical properties of each mineral parameter are analyzed. Second, the micro-mechanical parameters obtained by the nano-indentation test were not converted into the macro-mechanical properties of the granite as a whole

Images