Rapidly-cured environment-friendly grouting material and preparation process thereof

Abstract

The invention is applicable to the technical field of grouting materials, and provides a rapidly-cured environment-friendly grouting material and a preparation process thereof, the grouting material is prepared from an agent A, an agent B, a filler and water according to a mass ratio of (9-17): (1-4): (2-5): (40-60); the agent A is prepared from the following components in parts by mass: 100 to 200 parts of Portland cement, 300 to 600 parts of sulphoaluminate cement, 50 to 100 parts of fly ash, 4 to 10 parts of octyl silane, 12 to 30 parts of ammonium sulfate and 14 to 26 parts of polyurethane emulsion; the agent B is prepared from the following components in parts by mass: 1 to 3 parts of glass fiber, 2 to 5 parts of thickening agent, 8 to 20 parts of waterborne acrylic emulsion, 3.5 to 6.5 parts of soybean protein, 2 to 6 parts of expanding agent, 3 to 5 parts of nano silicon dioxide and 1.5 to 2.5 parts of nano calcium carbonate. According to the invention, rapid curing of the grouting material is realized, the construction time is greatly shortened, and the prepared grouting material has good mechanical properties, durability and stability; meanwhile, the grouting material is prepared from environment-friendly raw materials, so that the negative influence on the environment is reduced, and the concept of green and sustainable development is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of grouting materials, in particular to a rapid-curing environment-friendly grouting material and a preparation process thereof. BACKGROUND

[0002] Grouting material is the main substance that fills and consolidates in the stratum fissure and pore, and it is the key to realize the water plugging or reinforcement. Grouting material can be divided into granular slurry, chemical slurry and fine mineral slurry. The currently used granular grouting material mainly includes single-liquid cement slurry, clay cement slurry and cement-sodium silicate slurry. Chemical slurry is similar to true solution and has some unique properties, such as low slurry viscosity, good injectability, accurate gel time control, etc. However, chemical slurry is relatively expensive and often has toxicity and environmental pollution problems, so it is generally used for treating fine fissures and fine sand layers that cannot be injected with granular slurry. Fine mineral slurry is a new type of grouting material developed in recent years. In terms of component design, more attention is paid to the combination of different natural minerals, artificial minerals and special functional materials to achieve breakthroughs in key properties such as slurry performance, consolidation performance and long-term durability. The slurry performance of some fine mineral slurries, such as slurry stability, slurry viscosity, injectability, adjustability of gel time, consolidation strength and solidified body volume, has approached or exceeded that of chemical slurry with superior performance.

[0003] Grouting materials are commonly used in civil engineering for ground reinforcement, crack repair, and waterproofing in underground engineering, and they can be selected according to different components and properties, such as:

[0004] A high polymer grouting material grouting effect evaluation method and grouting material are disclosed in Chinese patent CN201910224614.0 and CN110118852B. The method mainly compares the filling rate of the grouting parameters of the cement grouting material, which is relatively mature, and selects the grouting parameters of the high polymer grouting material. The high polymer grouting material provided includes two components, A and B. Component A is composed of isocyanate, foaming agent, foam stabilizer, antistatic agent, and epoxy resin and epoxy resin prepolymer diluent. Component B is composed of phosphoric acid, citric acid, polyol, water-soluble trihydroxy polyether, curing agent, flame retardant, and plasticizer. The evaluation method can optimize the grouting parameters, shorten the grouting time during anchor rod construction, save grouting materials, and achieve good filling effect. It can safely and efficiently enhance the self-bearing capacity of surrounding rock, apply high pre-tightening force to the grouting anchor cable, and improve the support strength of the surrounding rock.

[0005] A kind of composite grouting material and its preparation method are disclosed in Chinese patent with application number CN201910367002.7 and publication number CN110054458B.The present application relates to the technical field of composite grouting, and the raw materials include cement, wetting agent and adjusting agent by weight fraction.The present application also discloses a preparation method of the composite grouting material, which mixes the raw materials of the composite grouting material mentioned above.The composite grouting material prepared has the advantages of underwater dispersion resistance of slurry and lower cost compared with other grouting materials.

[0006] Although existing grouting materials have made certain progress in performance and application, there are still some deficiencies, for example, some grouting materials have a long curing time, making it difficult to meet the demand for rapid construction.In addition, with the increasing demand for environmental protection, more and more grouting materials need to meet environmental protection standards to reduce negative impact on the environment.Therefore, it is particularly important to develop a grouting material that can quickly cure and meet environmental protection requirements. SUMMARY

[0007] The present application aims to provide a fast-curing and environmentally friendly grouting material and its preparation process to solve the problems in the background art.

[0008] To achieve the above-mentioned purpose, the present application provides the following technical solution: the present application provides a fast-curing and environmentally friendly grouting material, which is prepared by mixing A agent, B agent, filler and water in a mass ratio of (9-17):(1-4):(2-5):(40-60).

[0009] The A agent includes 100-200 parts of Portland cement, 300-600 parts of sulphoaluminate cement, 50-100 parts of fly ash, 4-10 parts of octylsilane, 12-30 parts of ammonium sulfate and 14-26 parts of polyurethane emulsion by mass fraction.

[0010] The B agent includes 1-3 parts of glass fiber, 2-5 parts of thickening agent, 8-20 parts of water-based acrylic emulsion, 3.5-6.5 parts of soybean protein, 2-6 parts of expanding agent, 3-5 parts of nano silicon dioxide and 1.5-2.5 parts of nano calcium carbonate by mass fraction.

[0011] Preferably, the filler includes but is not limited to gypsum, lime powder and silica fume, and the mass ratio of the gypsum, lime powder and silica fume is (3-5):(2-3):(1-5).

[0012] Preferably, the mass ratio of the Portland cement, sulphoaluminate cement and fly ash is 2:6:1.

[0013] Preferably, the thickening agent is one or more of cellulose-based thickening agent, alginic acid-based thickening agent and starch-based thickening agent.

[0014] Preferably, the expansion agent is one or more of bauxite, calcium hydroxide, and sulphoaluminate.

[0015] Preferably, the agent B further comprises calcium chloride and sodium carbonate, and the mass fractions of the calcium chloride and sodium carbonate are 0.6-1.5 parts and 0.9-1.4 parts respectively.

[0016] The second aspect of the present invention provides a process for preparing the grouting material according to the first aspect of the present invention, comprising the following steps:

[0017] S1, preparation of agent A:

[0018] Add Portland cement, sulfoaluminate cement, fly ash, octylsilane, ammonium sulfate, and polyurethane emulsion to a mixing device, set the speed, and stir for 25-35 minutes to prepare Agent A;

[0019] S2, preparation of agent B:

[0020] Add glass fiber, thickener, water-based acrylic emulsion, soy protein, and expander into a mixing device and stir for 10-15 minutes. Then add nano-silicon dioxide and nano-calcium carbonate and continue stirring for 5-15 minutes to prepare Agent B.

[0021] S3, prepare grouting materials:

[0022] In a high-speed mixer, add water and filler, stir for 3-5 minutes, then add agent A and agent B, continue stirring for 10-15 minutes to prepare the grouting material.

[0023] Preferably, the rotation speed for preparing agent A in S1 is 600-800 rpm.

[0024] Preferably, the rotation speed of the preparation of agent B in S2 is 300-400 rpm.

[0025] Preferably, the rotation speed of S3 is 1000-1200 rpm and the temperature is 40-45°C.

[0026] The present invention has at least the following beneficial effects:

[0027] The present invention provides a fast-curing, environment-friendly grouting material and a preparation process thereof, which realizes the rapid curing of the grouting material and greatly shortens the construction time. The prepared grouting material has good mechanical properties, durability and stability. At the same time, the grouting material adopts environment-friendly raw materials, reduces the negative impact on the environment, and conforms to the concept of green and sustainable development. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application are clearly and completely described below. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0029] Embodiment 1

[0030] The embodiment provides a fast-curing environment-friendly grouting material, which is prepared by mixing A agent, B agent, fillers and water in a mass ratio of 9:1:2:40.

[0031] The A agent includes 100 parts of portland cement, 300 parts of sulphoaluminate cement, 50 parts of fly ash, 4 parts of octyl silane, 12 parts of ammonium sulfate and 14 parts of polyurethane emulsion in terms of mass fraction.

[0032] The B agent includes 1 part of glass fiber, 2 parts of thickening agent, 8 parts of water-based acrylic emulsion, 3.5 parts of soybean protein, 2 parts of expanding agent, 3 parts of nano silicon dioxide and 1.5 parts of nano calcium carbonate in terms of mass fraction.

[0033] The fillers include gypsum, lime powder and silica fume, and the mass ratio of the gypsum, the lime powder and the silica fume is 3:2:1.

[0034] The mass ratio of the portland cement, the sulphoaluminate cement and the fly ash is 2:6:1.

[0035] The thickening agent is a cellulose thickening agent, and the expanding agent is bauxite.

[0036] The preparation process of the grouting material includes the following steps.

[0037] S1, preparing the A agent:

[0038] The portland cement, the sulphoaluminate cement, the fly ash, the octyl silane, the ammonium sulfate and the polyurethane emulsion are added into a mixing device, the rotating speed is set to 600 rpm, and the mixture is stirred for 35 min to prepare the A agent.

[0039] S2, preparing the B agent:

[0040] The glass fiber, the thickening agent, the water-based acrylic emulsion, the soybean protein and the expanding agent are added into a mixing device, and the mixture is stirred at 300 rpm for 15 min, then the nano silicon dioxide and the nano calcium carbonate are added, and the mixture is continuously stirred for 15 min to prepare the B agent.

[0041] S3, preparing the grouting material:

[0042] In a high-speed mixer, add water and filler, heat to 45°C, stir at 1000 rpm for 5 minutes, then add agent A and agent B, continue stirring for 15 minutes to prepare the grouting material.

[0043] Example 2

[0044] This embodiment provides a fast-curing, environmentally friendly grouting material, which is prepared by mixing agent A, agent B, filler, and water in a mass ratio of 11:3:4:50;

[0045] In parts by mass, Agent A includes 160 parts of Portland cement, 480 parts of sulfoaluminate cement, 80 parts of fly ash, 9 parts of octylsilane, 15 parts of ammonium sulfate, and 20 parts of polyurethane emulsion;

[0046] In parts by mass, Agent B includes 2 parts of glass fiber, 3 parts of thickener, 12 parts of water-based acrylic emulsion, 5 parts of soy protein, 4 parts of expander, 3.5 parts of nano-silicon dioxide, and 2 parts of nano-calcium carbonate.

[0047] The filler includes but is not limited to gypsum, lime powder and silica fume, and the mass ratio of the gypsum, lime powder and silica fume is 4:2.5:3.

[0048] Among them, the mass ratio of silicate cement, sulphoaluminate cement and fly ash is 2:6:1.

[0049] Among them, the thickener is an alginic acid thickener; the expansion agent is calcium hydroxide.

[0050] The preparation process of the above grouting material comprises the following steps:

[0051] S1, preparation of agent A:

[0052] Add Portland cement, sulfoaluminate cement, fly ash, octylsilane, ammonium sulfate, and polyurethane emulsion into a mixing device, set the speed to 700 rpm, and stir for 30 minutes to prepare Agent A;

[0053] S2, preparation of agent B:

[0054] Add glass fiber, thickener, water-based acrylic emulsion, soy protein, and expander into a mixing device, stir at 350 rpm for 12 minutes, then add nano-silicon dioxide and nano-calcium carbonate, and continue stirring for 10 minutes to prepare Agent B;

[0055] S3, prepare grouting materials:

[0056] In a high-speed mixer, water and filler were added, the temperature was raised to 42°C, and the mixture was stirred at 1100 rpm for 4 minutes. Then, agent A and agent B were added, and the mixture was stirred for 12 minutes to obtain a grouting material.

[0057] Example 3

[0058] The embodiment provides an environment-friendly rapid-curing grouting material, which is prepared by mixing A agent, B agent, fillers and water in a mass ratio of 17:4:5:60;

[0059] The A agent comprises 200 parts of portland cement, 600 parts of sulphoaluminate cement, 100 parts of fly ash, 10 parts of octyl silane, 30 parts of ammonium sulfate and 26 parts of polyurethane emulsion in terms of mass fraction.

[0060] The B agent comprises 3 parts of glass fiber, 5 parts of thickening agent, 20 parts of water-based acrylic emulsion, 6.5 parts of soybean protein, 6 parts of expanding agent, 5 parts of nano silicon dioxide and 2.5 parts of nano calcium carbonate in terms of mass fraction.

[0061] The fillers include, but are not limited to, gypsum, lime powder and silica fume, and the mass ratio of the gypsum, the lime powder and the silica fume is 5:3:5.

[0062] The mass ratio of the portland cement, the sulphoaluminate cement and the fly ash is 2:6:1.

[0063] The thickening agent is a starch thickening agent, and the expanding agent is a sulphoaluminate.

[0064] The preparation process of the grouting material includes the following steps.

[0065] S1, preparing the A agent:

[0066] The portland cement, the sulphoaluminate cement, the fly ash, the octyl silane, the ammonium sulfate and the polyurethane emulsion are added into a mixing device, the rotating speed is set to 800 rpm, and stirring is performed for 25 min to obtain the A agent.

[0067] S2, preparing the B agent:

[0068] The glass fiber, the thickening agent, the water-based acrylic emulsion, the soybean protein and the expanding agent are added into a mixing device, stirring is performed at 400 rpm for 10 min, then the nano silicon dioxide and the nano calcium carbonate are added, and stirring is continuously performed for 5 min to obtain the B agent.

[0069] S3, preparing the grouting material:

[0070] The water and the fillers are added into a high-speed mixer, the temperature is increased to 40℃, stirring is performed at 1200 rpm for 3 min, then the A agent and the B agent are added, and stirring is continuously performed for 10 min to obtain the grouting material.

[0071] Embodiment 4

[0072] The embodiment provides an environment-friendly rapid-curing grouting material, which is prepared by mixing A agent, B agent, fillers and water in a mass ratio of 9:1:2:40;

[0073] The A agent comprises 100 parts of Portland cement, 300 parts of sulphoaluminate cement, 50 parts of fly ash, 4 parts of octyl silane, 12 parts of ammonium sulfate, and 14 parts of polyurethane emulsion in terms of mass fraction;

[0074] The B agent comprises 1 part of glass fiber, 2 parts of thickening agent, 8 parts of water-based acrylic emulsion, 3.5 parts of soybean protein, 2 parts of expanding agent, 3 parts of nano-silicon dioxide, 1.5 parts of nano-calcium carbonate, 0.6 parts of calcium chloride, and 0.9 parts of sodium carbonate in terms of mass fraction.

[0075] The remaining technical features are the same as those of Example 1.

[0076] Example 5

[0077] The present embodiment provides a fast-curing environment-friendly grouting material, which is prepared by mixing A agent, B agent, filler, and water in a mass ratio of 11:3:4:50;

[0078] The A agent comprises 160 parts of Portland cement, 480 parts of sulphoaluminate cement, 80 parts of fly ash, 9 parts of octyl silane, 15 parts of ammonium sulfate, and 20 parts of polyurethane emulsion in terms of mass fraction;

[0079] The B agent comprises 2 parts of glass fiber, 3 parts of thickening agent, 12 parts of water-based acrylic emulsion, 5 parts of soybean protein, 4 parts of expanding agent, 3.5 parts of nano-silicon dioxide, 2 parts of nano-calcium carbonate, 0.7 parts of calcium chloride, and 1.3 parts of sodium carbonate in terms of mass fraction.

[0080] The remaining technical features are the same as those of Example 2.

[0081] Example 6

[0082] The present embodiment provides a fast-curing environment-friendly grouting material, which is prepared by mixing A agent, B agent, filler, and water in a mass ratio of 17:4:5:60;

[0083] The A agent comprises 200 parts of Portland cement, 600 parts of sulphoaluminate cement, 100 parts of fly ash, 10 parts of octyl silane, 30 parts of ammonium sulfate, and 26 parts of polyurethane emulsion in terms of mass fraction;

[0084] The B agent comprises 3 parts of glass fiber, 5 parts of thickening agent, 20 parts of water-based acrylic emulsion, 6.5 parts of soybean protein, 6 parts of expanding agent, 5 parts of nano-silicon dioxide, 2.5 parts of nano-calcium carbonate, 1.5 parts of calcium chloride, and 1.4 parts of sodium carbonate in terms of mass fraction.

[0085] The remaining technical features are the same as those of Example 3.

[0086] In the above Examples 1-6:

[0087] Silicate cement and sulphoaluminate cement as the main cementitious material, provide the basic strength and curing performance of the grouting material; the addition of fly ash can improve the liquidity and workability of the material, while increasing the late strength development; octyl silane greatly enhances the frost resistance, crack resistance, wear resistance and other properties of the grouting material;

[0088] Ammonium sulfate as an accelerator, can shorten the curing time of the grouting material; polyurethane emulsion can enhance the adhesion and elasticity of the grouting material, improve the overall performance of the material; glass fiber can increase the toughness and crack resistance of the grouting material; thickening agent is used to adjust the viscosity of the grouting material, so that it is easy to construction; water-based acrylic emulsion can improve the water resistance and durability of the grouting material; soybean protein as a natural binder, not only environmental protection, but also can improve the adhesion performance of the grouting material; the expansion agent produces micro-expansion during the curing process of the grouting material, fills the pores, improves the density and strength.

[0089] Nano-silicon dioxide and nano-calcium carbonate as nanomaterials can significantly improve the mechanical properties and durability of the grouting material; calcium chloride and sodium carbonate can further adjust the curing time and performance of the grouting material, so that it is more suitable for different construction environments and needs.

[0090] The grouting material prepared by the synergistic effect of the above components not only cures quickly, but also has excellent environmental performance, can effectively reduce the negative impact on the environment, and meets the high requirements of modern engineering on grouting materials.

[0091] A series of related performance tests were carried out on the products prepared in the above examples 1-6, and the results are as follows:

[0092]

[0093]

[0094] In summary, the grouting material of the present application greatly shortens the setting time compared with the prior art, can quickly cure and improve the construction efficiency. At the same time, the compressive strength is high, showing good mechanical properties. In terms of frost resistance, after several freeze-thaw cycles, the performance of the grouting material remains stable, the plastic expansion rate is moderate, indicating that the grouting material of the present application has good durability and stability.

[0095] The foregoing shows and describes the basic principles of the application, the main features and the advantages of the application. It is obvious for those skilled in the art that the application is not limited to the details of the above exemplary embodiments, but the application can be implemented in other specific forms without departing from the spirit or essential characteristics of the application. Therefore, the embodiments should be regarded as exemplary and non-limiting, the scope of the application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced in the application.

[0096] Although embodiments of the application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the application, the scope of the application being defined by the appended claims and their equivalents.

Claims

1. A fast-curing environmentally friendly grouting material, characterized in that: The grouting material is prepared by mixing agent A, agent B, filler and water in a mass ratio of (9-17):(1-4):(2-5):(40-60); In parts by mass, the agent A comprises 100-200 parts of Portland cement, 300-600 parts of sulfoaluminate cement, 50-100 parts of fly ash, 4-10 parts of octylsilane, 12-30 parts of ammonium sulfate, and 14-26 parts of polyurethane emulsion; In parts by mass, the agent B comprises 1-3 parts of glass fiber, 2-5 parts of thickener, 8-20 parts of water-based acrylic emulsion, 3.5-6.5 parts of soy protein, 2-6 parts of expander, 3-5 parts of nano-silicon dioxide, and 1.5-2.5 parts of nano-calcium carbonate.

2. The fast-curing environmentally friendly grouting material according to claim 1, characterized in that: The filler includes but is not limited to gypsum, lime powder and silica fume, and the mass ratio of the gypsum, lime powder and silica fume is (3-5):(2-3):(1-5).

3. The fast-curing environmentally friendly grouting material according to claim 1, characterized in that: The mass ratio of the Portland cement, sulphoaluminate cement and fly ash is 2:6:

1.

4. The fast-curing environmentally friendly grouting material according to claim 1, characterized in that: The thickener is one or more of a cellulose thickener, an alginic acid thickener, and a starch thickener.

5. The fast-curing environmentally friendly grouting material according to claim 1, characterized in that: The expansion agent is one or more of bauxite, calcium hydroxide, and sulphoaluminate.

6. The fast-curing environmentally friendly grouting material according to claim 1, characterized in that: The agent B further comprises calcium chloride and sodium carbonate, wherein the mass fractions of the calcium chloride and sodium carbonate are 0.6-1.5 parts and 0.9-1.4 parts respectively.

7. The process for preparing the grouting material according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1, preparation of agent A: Add Portland cement, sulfoaluminate cement, fly ash, octylsilane, ammonium sulfate, and polyurethane emulsion to a mixing device, set the speed, and stir for 25-35 minutes to prepare Agent A; S2, preparation of agent B: Add glass fiber, thickener, water-based acrylic emulsion, soy protein, and expander into a mixing device and stir for 10-15 minutes. Then add nano-silicon dioxide and nano-calcium carbonate and continue stirring for 5-15 minutes to prepare Agent B. S3, prepare grouting materials: In a high-speed mixer, add water and filler, stir for 3-5 minutes, then add agent A and agent B, continue stirring for 10-15 minutes to prepare the grouting material.

8. The process for preparing the grouting material according to claim 7, wherein: The rotation speed for preparing agent A in S1 is 600-800 rpm.

9. The process for preparing the grouting material according to claim 7, wherein: The rotation speed for preparing agent B in S2 is 300-400 rpm.

10. The process for preparing the grouting material according to claim 7, characterized in that: The rotation speed of S3 is 1000-1200 rpm, and the temperature is 40-45°C.

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