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Rock hard structural surface model material and its application method
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A technology of model materials and structural surfaces, applied in the direction of applying stable shear force to test the strength of materials, preparation of test samples, etc., can solve the problems affecting the accuracy of test parameters, difficulty in separating membranes, and high density of mixtures and other problems, to achieve the effect of good coordination between physical and mechanical properties and original rock, simple production method, and large adjustment range
Inactive Publication Date: 2017-11-21
CHENGDU UNIVERSITY OF TECHNOLOGY
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Abstract
Description
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Problems solved by technology
Using this method, it is extremely difficult to ensure that the isolation membrane does not produce wrinkles and cracks, because the mixture has a high density and a rough surface, which can easily cause the isolation membrane to be broken by friction
More importantly, the use of isolation membranes will produce tensile support due to the spread of the isolation membranes on the rock structure surface, making it difficult for cement mortar to fill the detailed structure on the surface of the structure surface, resulting in the inability to completely shape the shape, thus The actual surface morphology of the structural surface is changed, resulting in the distortion of the simulated structural surface shape, and the decrease of the occlusal degree of the upper and lower plates on the structural surface, which affects the accuracy of the test parameters
Method used
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Embodiment 1
[0027] The rock hard structural surface model material is composed of the following raw materials, in parts by weight, 30 parts of cement, 40 parts of sand, 10 parts of water, 10.2 parts of 3mm-6mm gravel, and 0.6 parts of composite early strength agent.
[0028] The sand is composed of medium fine sand and coarse sand, and the weight ratio is 1:1.
[0029] The prepared material has a compressive strength of 41MPa, which can be used to simulate medium-strength rock.
Embodiment 2
[0031] Rock hard structural surface model material, composed of the following raw materials,
[0032] According to parts by weight, 30 parts of cement, 40 parts of sand, 10 parts of water, 10.2 parts of 3mm~6mm crushed stone, 0.4 parts of water reducing agent, 0.6 parts of composite early strength agent, 2.8 parts of microsilica fume, 6 parts of green silicon carbide micropowder .
[0033] The sand is composed of medium fine sand and coarse sand, and the weight ratio is 1:1.
[0034] The prepared material was tested with a strength of 64MPa, which can be used to simulate hard rock.
Embodiment 3
[0036] According to parts by weight, 30 parts of cement, 40 parts of sand, 10 parts of water, 10.2 parts of 3mm~6mm crushed stone, 0.1 part of water reducing agent, 0.6 part of composite early strength agent, 2 parts of microsilica powder, and 3 parts of green silicon carbide micropowder .
[0037] The sand is composed of medium fine sand and coarse sand, and the weight ratio is 1:1.
[0038] The prepared material was tested with a strength of 48MPa, which can be used to simulate relatively hard rock.
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Abstract
The invention relates to an experimental simulation material, specifically a rock hard structure surface model material, which is made of cement, sand, water, 3mm-6mm gravel, water reducing agent, composite early strength agent, micro silicon powder, and green silicon carbide micro powder . A paraffin wax structural surface mold is prepared on the hard structural surface of the rock core with paraffin, and then a rock hard structural surface model is obtained by pouring the rock hard structural surface model material. The rock hard structural surface model material provided by the present invention has a large range of material strength adjustment, and can cover the needs of rock mass hard structural surface simulation tests with below-medium strength, medium strength and above-medium strength. Use this material to make a model, and use paraffin wax to be easily heated into a liquid, which can well "read" the undulating shape information of the small protrusions and depressions on the hard structural surface, and carry out mesoscopic and accurate simulation of the structural surface, so as to truly restore it. The complete shape of the structural surface.
Description
technical field [0001] The invention relates to an experimental simulation material, in particular to a model material for rock hard structural surfaces and a method for using the same. Background technique [0002] Structural surface mechanical model test is an important means to study the mechanical characteristics and shear failure mechanism of rock mass structural surface. In order to obtain test samples, it is necessary to manually produce a model that has similar physical and mechanical properties and surface morphology to the structural surface of the original rock, so that repeated direct shear tests can be performed on the structural surface to obtain reliable shear strength parameters of the structural surface. [0003] In order to meet the above urgent engineering needs, the parameters of the physical and mechanical model must be as close as possible to the original rock. Two aspects are particularly important, one is the mechanical parameters of the model materia...
Claims
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Application Information
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