Blanc fixe cementitious rock soil-like material and method for making simulative rock from the blanc fixe cementitious rock soil-like material

Abstract

The invention relates to a blanc fixe cementitious rock soil-like material and a method for making simulative rock from the blanc fixe cementitious rock soil-like material and belongs to the technical field of rock material simulation in a geomechanical model test. The blanc fixe cementitious rock soil-like material comprises blanc fixe as a aggregate, bentonite as an auxiliary material, and dilute glue composed of 107 glue and water. The method comprises the following steps of drawing a water-binder ratio-shearing strength f curve by the blanc fixe cementitious rock soil-like material, calculating wet density of different batches of the blanc fixe cementitious rock soil-like materials, and making a small test-piece from different batches of the blanc fixe cementitious rock soil-like materials. The blanc fixe cementitious rock soil-like material has a low cost and no toxicity, can be processed into small blocks easily, and can satisfy requirements of a geomechanical model test on the blanc fixe cementitious rock soil-like material. Simulative rock made from the blanc fixe cementitious rock soil-like material does not influence a model building process and can be made fast so that a model test rate is greatly improved. The blanc fixe cementitious rock soil-like material is suitable for the field of a test on a model built by laying small blocks.

Description

technical field [0001] The invention belongs to the technical field of simulation technology of rock-soil materials in geomechanical model tests, and in particular relates to a novel rock-soil similar material and a method for making simulated rock masses, which are used for geomechanical model tests involving engineering fields such as water conservancy, transportation, and mining. It is suitable for the simulation of medium and medium geotechnical materials, and is especially suitable for small block model tests. Background technique [0002] Geomechanical model tests can simulate the characteristics of engineering structures, and can also approximate the influence of geological factors such as rock mass faults on engineering stability, so it plays an extremely important role in the design of water conservancy, mining, tunnels, etc. Applications. [0003] According to the objective requirement of the similarity rate between engineering practice and model test, the geomech...

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Problems solved by technology

Therefore, the research and development of similar materials for geomechanical model tests has always been a research hotspot and difficulty in model tests. Relevant scientific research institutions at home and abroad continue to carry out research and development of similar materials. Various new similar materials emerge in endlessly, but few of them can fully meet these requirements. required material

[0004] In the 1980s, Wuhan University of Water Resources and Electric Power invented a similar material mixed with barite powder, film iron powder and rosin alcohol, referred to as MIB material; the elastic modulus of this material can be adjusted according to the thickness of the film, but The neoprene of the iron powder adhesive contains toluene, which is harmful to the human body

Tsinghua University invented a similar material composed of magnetite concentrate powder, river sand, binder gypsum or cement (NIOS) in the early 21st century. This material has stable properties, large capacity, and low price, but it is dry, The maintenance time is long, and the material cannot be reused

Shandong University applied for iron crystal sand cemented rock-soil similar material and its preparation method in 2005, application number 200510104581.4, publication number CN1792990A, the mechanical properties of this material are relatively good, the cost is low, but it uses quartz sand as the main bone materials, not suitable for fine masonry of small blocks

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