A rock-like material satisfying the characteristics of water-induced strength degradation, its preparation method and application

A rock similarity and strength technology, applied in the field of geological engineering, can solve the problems of difficult to obtain the law of water-induced rock slope strength degradation, difficult to disintegrate, difficult to slide, etc., to improve bulk density and mechanical properties, simplify model making, simplify conversion effect

Active Publication Date: 2022-06-17
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned similar materials mainly simulate hard rocks. Although they have softening properties similar to rocks under certain proportions and curing conditions, they are generally not easy to disintegrate when exposed to water. In some large-scale rock landslide physics During the model experiment, it is difficult to slide or fail, and it is difficult to obtain the law of water-induced rock slope strength degradation

Method used

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  • A rock-like material satisfying the characteristics of water-induced strength degradation, its preparation method and application
  • A rock-like material satisfying the characteristics of water-induced strength degradation, its preparation method and application
  • A rock-like material satisfying the characteristics of water-induced strength degradation, its preparation method and application

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preparation example Construction

[0040] The present invention provides a method for preparing a rock-like material satisfying the water-induced strength degradation characteristics according to the above technical solution, comprising the following steps:

[0041] Aggregate, cementitious material, additives and water are mixed, and cured after molding to obtain a rock-like material that satisfies the characteristics of water-induced strength deterioration.

[0042] In the present invention, the mass of the water is preferably 10-15% of the total mass of aggregate, cementitious material and additives, more preferably 11-12%.

[0043] In the present invention, the mixing method is preferably stirring and mixing. The present invention does not have any special restrictions on the speed and time of the stirring and mixing, as long as the preparation raw materials can be mixed uniformly; the mixing order is preferably to mix the aggregate and The cementitious materials are first mixed to obtain a dry material; the...

Embodiment 1

[0050] 222.50g quartz sand (grain size of 20-40 mesh coarse quartz sand: 40-70 mesh fine quartz sand mass ratio = 1:1), 89.00g barite powder (200 mesh size), 35.60g C425 type ordinary Portland cement, 53.40g of raw gypsum and 44.50g of bentonite (montmorillonite content>80wt%, particle size of 400 mesh) are mixed evenly, and then 55.00g of gypsum retarder aqueous solution (vegetable protein gypsum retarder) with a concentration of 0.01g / mL is added. Coagulant) mixed, the obtained wet material was filled in three layers into a steel mold washed with water and coated with lubricant, scratches were made at the layered place, and then placed on a hydraulic demolding instrument, at 20 ° C, Press molding under the condition of 10MPa for 8 minutes, then release the pressure to normal pressure, let it stand for 20 minutes at room temperature, and then release the mold, and then cure for 10 days at room temperature under dry and ventilated (humidity 50-60%) conditions to obtain the wate...

Embodiment 2～20

[0052] According to the method of Example 1, a rock-like material meeting the water-induced strength degradation characteristics was prepared, and the preparation raw materials of Examples 2 to 20 are shown in Table 1.

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Abstract

The invention provides a rock-like material satisfying the characteristics of water-induced strength degradation, a preparation method and application thereof, and relates to the technical field of geological engineering. The rock-like material meeting the characteristics of water-induced strength deterioration provided by the invention includes aggregate, cementing material and additives; the aggregate includes quartz sand, barite powder and bentonite; the cementing material includes cement and gypsum. In the present invention, bentonite is used as a material water sensitivity regulator. The main mineral component of bentonite is montmorillonite, which has strong water absorption and rapidly expands in volume after absorbing water, so that rock-like materials that meet the characteristics of water-induced strength deterioration are easily exposed to water. disintegration; at the same time, using quartz sand, barite powder and bentonite as aggregates, and cement and gypsum as cementing materials, while ensuring that such rock-like materials that meet the characteristics of water-induced strength deterioration are sensitive to water and easily disintegrate, Improving its bulk density and mechanical properties can well simulate the characteristics of rock mass strength degradation when it encounters water.

Description

technical field [0001] The invention relates to the technical field of geological engineering, in particular to a rock-like material satisfying the characteristics of water-induced strength deterioration and a preparation method and application thereof. Background technique [0002] The impact of landslides on human society has become an environmental disaster that cannot be ignored, and its harm has become the second natural disaster after earthquakes. The gestation and development of landslides are not only closely related to geological conditions such as topography, geomorphology, and geological structure, but also to inducing factors such as rainfall, earthquakes, and human activities. Among them, landslides caused by rainfall are the most widely distributed, have the highest frequency, and are the most harmful, accounting for about 80% of the total number of landslides. Rocky slopes in landslides caused by rainfall often cause significant economic losses and casualties...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/20C04B2201/50C04B14/06C04B14/104C04B14/28C04B22/142C04B2103/22C04B2111/542C04B28/14C04B7/02C04B14/368C04B40/0071C04B22/16C04B24/14C04B11/28C04B40/0042C04B2111/00991
Inventor 崔远许超薛雷翟梦阳张珂
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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