Wave-absorbing and vibration-reducing anchoring mortar and preparation method thereof

Abstract

The invention discloses wave-absorbing and vibration-reducing anchoring mortar and a preparation method thereof. The wave-absorbing and vibration-reducing anchoring mortar is prepared from 1 part of cement, 0.8 to 1.5 parts of medium sand, 0.024 to 0.072 part of rubber particles, 0.0011 to 0.0028 part of polypropylene fiber, 0.003 part of triethanolamine and 0.001 part of CaCl2. The rubber particles can greatly absorb and reflect stress waves and reduce final transmission stress waves, the polypropylene fibers enable the wave-absorbing and vibration-reducing anchoring mortar material to be more integral, a certain dynamic wave-absorbing effect can be improved, meanwhile, the anti-bending and anti-fracture effects of the anchoring mortar can be improved, and the damage and cracking degree can be reduced.

Description

Technical Field

[0001] This application relates to the field of prevention and control of dynamic disasters in deep engineering, and particularly to a wave-absorbing and vibration-damping anchoring mortar and a preparation method thereof. Background Art

[0002] In recent years, the construction of water conservancy and civil engineering has gradually moved deeper, the geological conditions have become extremely complex, and high ground stress and high excavation disturbance are faced. When blasting and excavating deep engineering, the blasting stress wave propagates inside the surrounding rock. The surrounding rock in the high-stress critical state is subjected to dynamic disturbance, often resulting in disasters such as rock bursts, which seriously endanger the safety of personnel and equipment. At present, the current anchoring support design is generally for the static load of the surrounding rock, and there is no good wave-absorbing and vibration-damping support technology for reducing the vibration inside the surrounding rock. Summary of the Invention

[0003] In view of this, the present invention patent provides a wave-absorbing and vibration-damping anchoring mortar and a preparation method thereof.

[0004] Specifically, a wave-absorbing and vibration-damping anchoring mortar is provided, including:

[0005] 1 part of cement, 0.8 - 1.5 parts of medium sand, 0.024 - 0.072 parts of rubber particles, 0.0011 - 0.0028 parts of polypropylene fiber, 0.003 parts of triethanolamine, 0.001 part of CaCl2 and 0.4 - 0.45 parts of water.

[0006] Optionally, the particle size of the medium sand is less than 1 mm.

[0007] Optionally, the cement used is cement with a strength grade of 42.5.

[0008] Optionally, the strength of the wave-absorbing and vibration-damping anchoring mortar is not less than 20 Mpa.

[0009] On the other hand, this application provides a preparation method of a wave-absorbing and vibration-damping anchoring mortar, including:

[0010] Mix the cement and the medium sand evenly at a ratio of 1:0.8 - 1.5 to obtain a basic mortar composed of cement and sand;

[0011] Add 0.024 - 0.072 parts of rubber particles to the basic mortar and stir. The stirring time should not be less than 3 minutes to obtain an initial mixed mortar;

[0012] Uniformly add 0.0011 - 0.0028 parts of polypropylene fiber to the initial mixed mortar to obtain a primary mixed mortar;

[0013] Add 0.4 - 0.45 parts of water to the primary mixed mortar and stir. The stirring time should not be less than 2 minutes to obtain the secondary mixed mortar;

[0014] Add the admixture to the secondary mixed mortar. The admixture includes 0.003 parts of triethanolamine and 0.001 parts of CaCl2 to obtain the wave - absorbing and vibration - damping anchoring mortar.

[0015] Optionally, the step of uniformly adding 0.0011 - 0.0028 parts of polypropylene fiber to the initial mixed mortar to obtain the primary mixed mortar includes:

[0016] Uniformly add 0.0011 - 0.0028 parts of polypropylene fiber to the initial mixed mortar through a vibrating sieve to obtain the primary mixed mortar.

[0017] In this application, by adding a certain amount of wave - absorbing and vibration - damping materials combined with cement and sand, the anchoring mortar has a good wave - absorbing and vibration - damping effect on the basis of meeting the compressive conditions. At the same time, it has low cost, convenient preparation and construction, and has a wide application foundation. The wave - absorbing and vibration - damping materials include: rubber particles and polypropylene fiber. Brief Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Among them:

[0020] Figure 1 is a schematic diagram of a wave - absorbing and vibration - damping anchoring mortar of the present invention in an embodiment;

[0021] Figure 2 is a stress - wave response diagram of a wave - absorbing and vibration - damping anchoring mortar of the present invention in an embodiment;

[0022] Figure 3 is an effect diagram of a wave - absorbing and vibration - damping anchoring mortar of the present invention in an embodiment;

[0023] Figure 4 is a stress - wave response energy diagram of a wave - absorbing and vibration - damping anchoring mortar of the present invention in an embodiment;

[0024] Figure 5 is a preparation flow chart of a wave - absorbing and vibration - damping anchoring mortar of the present invention in an embodiment. Detailed Embodiments

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] In the following description, specific details such as specific system architectures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. However, those skilled in the art should understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from obscuring the description of the present application.

[0027] It should be understood that when used in the specification and claims of the present application, the term "comprising" indicates the presence of the described features, wholes, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0028] It should also be understood that the term "and / or" as used in the specification and claims of the present application refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0029] As used in the specification and claims of the present application, the term "if" may be interpreted as "when", "once", "in response to determining", or "in response to detecting" according to the context. Similarly, the phrase "if determined" or "if [the described condition or event] is detected" may be interpreted as meaning "once determined", "in response to determining", "once [the described condition or event] is detected", or "in response to detecting [the described condition or event]" according to the context.

[0030] In addition, in the description of the specification and claims of the present application, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0031] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that a specific feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of this application. Thus, statements such as "in one embodiment", "in some embodiments", "in some other embodiments", "in still some other embodiments", etc. that appear in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0032] The present invention will be described in detail below through specific embodiments.

[0033] A wave-absorbing and vibration-damping anchoring mortar, comprising:

[0034] 1 part of cement, 0.8 - 1.5 parts of medium sand, 0.024 - 0.072 parts of rubber particles, 0.0011 - 0.0028 parts of polypropylene fiber, 0.003 parts of triethanolamine, 0.001 part of CaCl2, and 0.4 - 0.45 parts of water.

[0035] Further, the particle size of the medium sand is less than 1 mm.

[0036] Further, the cement used is cement with a strength grade of 42.5.

[0037] Further, the strength of the wave-absorbing and vibration-damping anchoring mortar is not less than 20 Mpa.

[0038] Exemplarily, taking the weight of cement as 1000 for measurement, the components of other materials should be: medium sand (particle size less than 1 mm) 800 - 1500, wave-absorbing and vibration-damping material A 24 - 72, wave-absorbing and vibration-damping material B 1.1 - 2.8, auxiliary admixture triethanolamine 3, CaCl2 1, and the addition amount of the auxiliary admixture can be adjusted according to the engineering situation. As Figures 2 - 3 shown, the wave-absorbing and vibration-damping anchoring mortar has good wave-absorbing and vibration-damping characteristics, that is, the characteristics of reducing the vibration frequency amplitude and vibration energy. The rubber particles can greatly absorb and reflect stress waves, reducing the final transmitted stress wave. The polypropylene fiber makes the wave-absorbing and vibration-damping anchoring mortar material more integral, and can also enhance a certain dynamic wave-absorbing effect. At the same time, it can also improve the flexural and flexural resistance effects of the anchoring mortar, reduce the degree of damage and cracking. The complexing agent can improve the uniform dispersion degree of each material inside the anchoring mortar and the uniformity of medium air bubbles. The early strength agent can make the main body of the anchoring mortar quickly formed, and make the wave-absorbing and vibration-damping anchoring mortar reach a certain performance in advance. According to relevant specifications in our country, according to different working conditions, the final strength of the anchoring mortar should not be less than 20 MPa and 35 MPa, and the wave-absorbing and vibration-damping anchoring mortar meets this requirement.

[0039] In a possible implementation, a preparation method of wave-absorbing and vibration-damping anchoring mortar is as follows Figure 5 shown, including:

[0040] S101. Uniformly mix cement and medium sand in a ratio of 1:0.8 - 1.5 to obtain a basic mortar composed of cement and sand;

[0041] S102. Add 0.024 - 0.072 parts of rubber particles to the basic mortar and stir. The stirring time should not be less than 3 minutes to obtain an initial mixed mortar;

[0042] S103. Uniformly add 0.0011 - 0.0028 parts of polypropylene fiber to the initial mixed mortar to obtain a primary mixed mortar;

[0043] S104. Add 0.4 - 0.45 parts of water to the primary mixed mortar and stir. The stirring time should not be less than 2 minutes to obtain a secondary mixed mortar;

[0044] S105. Add an admixture to the secondary mixed mortar. The admixture includes 0.003 parts of triethanolamine and 0.001 parts of CaCl2 to obtain the wave-absorbing and vibration-damping anchoring mortar as shown Figure 1 shown.

[0045] Optionally, the step of uniformly adding 0.0011 - 0.0028 parts of polypropylene fiber to the initial mixed mortar to obtain a primary mixed mortar includes:

[0046] Uniformly add 0.0011 - 0.0028 parts of polypropylene fiber to the initial mixed mortar through a vibrating sieve to obtain a primary mixed mortar

[0047] Exemplarily, another preparation method of wave-absorbing and vibration-damping anchoring mortar includes: Step 1: Uniformly mix cement and medium sand in a certain ratio to obtain a basic mortar composed of cement and sand. According to the characteristics of deep surrounding rock, the mass ratio of cement to medium sand is 1:0.8 - 1.5;

[0048] Step 2: Add 0.024 - 0.072 components of wave-absorbing and vibration-damping material A to the cement-sand, mix uniformly, and the stirring time should not be less than 3 minutes;

[0049] Step 3: Uniformly add 0.0011 - 0.0028 components of wave-absorbing and vibration-damping material B to the material obtained in Step 2. Make material B uniform during the adding process; Select a vibrating sieve to add uniformly, which can make the wave-absorbing and vibration-damping material efficiently distributed evenly.

[0050] Step 4: Add water in a certain proportion, and its mass proportion is about 0.4 - 0.45 parts by mass, stir evenly, and the stirring time shall not be less than 2 minutes;

[0051] Step 5: Add the admixture. The admixture is about 0.003 triethanolamine by mass component, and CaCl2 with a mass of 0.001. It can be fine-tuned according to the actual needs of the project.

[0052] After the wave-absorbing and vibration-damping anchoring mortar solidifies, perform the wave-absorbing and vibration-damping effect test. As Figure 4 shown, after dynamic compression by a Hopkinson bar, quickly analyze the incident wave, reflected wave, and transmitted wave. By keeping the incident wave consistent, analyze the final voltage-time curve for effect analysis, or perform energy calculation and analysis on the data. The lower the transmitted wave or transmitted energy, the better the wave-absorbing and vibration-damping effect is considered.

[0053] Those skilled in the art can clearly understand that for the convenience and conciseness of description, only the above division of each functional unit and module is used as an example. In actual applications, the above functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. An absorbing wave and damping anchoring mortar, characterized in that, The wave-absorbing and vibration-damping anchoring mortar comprises: 1 part of cement, 0.8 - 1.5 parts of medium sand, 0.024 - 0.072 parts of rubber particles, 0.0011 - 0.0028 parts of polypropylene fiber, 0.003 parts of triethanolamine, 0.001 part of CaCl2, and 0.4 - 0.45 parts of water.

2. The wave-absorbing and vibration-damping anchoring mortar according to claim 1, wherein The particle size of the medium sand is less than 1 mm.

3. The wave-absorbing and vibration-damping anchoring mortar according to claim 1, characterized in that, The cement used is cement with a strength grade of 42.

5.

4. The wave-absorbing and vibration-damping anchoring mortar according to claim 1, wherein, The strength of the wave-absorbing and vibration-damping anchoring mortar is not less than 20 MPa.

5. A preparation method of wave-absorbing and vibration-damping anchoring mortar, characterized in that, It includes: Uniformly mix the cement and the medium sand in a ratio of 1:0.8 - 1.5 to obtain a basic mortar composed of cement and sand; Add 0.024 - 0.072 parts of rubber particles to the basic mortar and stir to obtain an initial mixed mortar; Uniformly add 0.0011 - 0.0028 parts of polypropylene fiber to the initial mixed mortar to obtain a primary mixed mortar; Add 0.4 - 0.45 parts of water to the primary mixed mortar and stir to obtain a secondary mixed mortar; Add an admixture to the secondary mixed mortar to obtain the wave-absorbing and vibration-damping anchoring mortar.

6. The preparation method of the wave-absorbing and vibration-damping anchoring mortar according to claim 5, characterized in that, The step of adding 0.024 - 0.072 parts of rubber particles to the basic mortar and stirring to obtain an initial mixed mortar includes: Add 0.024 - 0.072 parts of rubber particles to the basic mortar and stir for not less than 3 minutes to obtain an initial mixed mortar.

7. The preparation method of the wave-absorbing and vibration-damping anchoring mortar according to claim 5, characterized in that, The step of adding 0.4 - 0.45 parts of water to the primary mixed mortar and stirring to obtain a secondary mixed mortar includes: Add 0.4 - 0.45 parts of water to the primary mixed mortar and stir for not less than 2 minutes to obtain a secondary mixed mortar.

8. The preparation method of the wave-absorbing and vibration-damping anchoring mortar according to claim 5, characterized in that, The step of uniformly adding 0.0011 - 0.0028 parts of polypropylene fiber to the initial mixed mortar to obtain a primary mixed mortar includes: Uniformly add 0.0011 - 0.0028 parts of polypropylene fiber to the initial mixed mortar through a vibrating sieve to obtain a primary mixed mortar.

9. The preparation method of the wave-absorbing and vibration-damping anchoring mortar according to claim 5, characterized in that, The admixture includes 0.003 parts of triethanolamine and 0.001 part of CaCl2.

Images