CN111484269B - Viscosity regulator for cement-based grouting material and preparation method thereof - Google Patents
Viscosity regulator for cement-based grouting material and preparation method thereof Download PDFInfo
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- CN111484269B CN111484269B CN201910078201.6A CN201910078201A CN111484269B CN 111484269 B CN111484269 B CN 111484269B CN 201910078201 A CN201910078201 A CN 201910078201A CN 111484269 B CN111484269 B CN 111484269B
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
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Abstract
The invention provides a viscosity regulator for a cement-based grouting material and a preparation method thereof. The viscosity regulator is prepared from the following raw materials in parts by weight: 5 to 20 parts of layered silicate mineral, 0.2 to 3.0 parts of water-soluble high molecular polymer, 0.5 to 2.0 parts of defoaming agent, 80 to 90 parts of water and 0.1 to 0.2 part of aqueous solution regulator. The preparation method comprises the following steps: uniformly mixing the layered silicate mineral, the water-soluble high molecular polymer and the defoaming agent to obtain a mixture; mixing an aqueous solution regulator with water to obtain a regulator solution; and mixing the mixture with a regulator solution, stirring, sealing and standing at room temperature to obtain the viscosity regulator. The viscosity regulator can improve the workability of the grouting material during the mixing process by adding water, can keep good fluidity of the grouting material, and improves the durability of the hardened grouting material; the preparation process is fine, the preparation process is simple, and the preparation process is an environment-friendly preparation process.
Description
Technical Field
The invention belongs to the technical application field of mineral material deep processing and building materials, and particularly relates to a viscosity regulator for a cement-based grouting material and a preparation method thereof.
Background
With the development of infrastructure construction in China, the cement-based grouting material is widely used for the installation of large-scale equipment and precision equipment, the anchoring of foundation bolts, the reinforcement and reconstruction of a concrete structure, the pore grouting of a prestressed concrete structure and the like as a grouting repair material with high fluidity, early strength, high strength and no shrinkage. As a plurality of foreign advanced devices are introduced into large-scale projects, device manufacturers and design units often put high demands on the fluidity. At present, two standards are issued in China, namely GB/T50448-2015 technical Specification for application of cement-based grouting materials and JC/T986-2018 cement-based grouting materials. Some grouting material manufacturers pursue high fluidity due to market competition, neglect the rich connotations of workability evaluation including stability, cohesiveness, segregation and bleeding of fresh mortar. When fresh mortar exhibits insufficient fluidity, site operators often increase the fluidity by incorporating water or water reducing agents. In this case, the cement-based grouting material is easily subject to segregation bleeding and poor workability.
In order to solve the above-mentioned phenomenon, a series of materials such as welan gum, polyacrylamide, cellulose ether, etc. have been developed in the industry to improve the viscosity of the grouting material, but the following problems exist: wenlun glue has a thickening effect when the mixing amount is low due to high viscosity. If the mixing amount is not well controlled, the fluidity of the fresh mortar is reduced. This phenomenon is particularly evident when the manufacturer's production equipment and metering equipment are not very accurate. The cellulose ether products applied to the cement-based grouting materials generally have low viscosity, the production process of the cellulose ether products is complex, few enterprises capable of being produced at home depend on foreign imports, and the price is often high. In addition to this, cellulose ether products have a pronounced effect of entraining air and of retarding setting, which also makes their use limited.
Disclosure of Invention
In view of the deficiencies in the prior art, it is an object of the present invention to address one or more of the problems in the prior art as set forth above. For example, it is an object of the present invention to provide a viscosity modifier capable of improving workability and fluidity of a cement-based grouting material during mixing with water and improving durability of the grouting material after hardening.
In order to achieve the above objects, an aspect of the present invention provides a viscosity modifier for cement-based grouting materials, which may be made of the following raw materials in parts by weight: 5 to 20 parts of layered silicate mineral, 0.2 to 3.0 parts of water-soluble high molecular polymer, 0.5 to 2.0 parts of defoaming agent, 80 to 90 parts of water and 0.1 to 0.2 part of aqueous solution regulator.
In one exemplary embodiment of the viscosity modifier for cement-based grouting material of the present invention, the phyllosilicate mineral may be constructed unit of two-dimensionally arranged aluminum or magnesium oxide octahedrons and silicon oxide tetrahedrons, which may constitute different structural layers according to 1.
In one exemplary embodiment of the viscosity modifier for cement-based grouting materials of the present invention, the phyllosilicate mineral may be a natural phyllosilicate mineral, and the phyllosilicate mineral may include one or a combination of two or more of kaolinite, montmorillonite, illite, and muscovite.
In one exemplary embodiment of the viscosity modifier for cement-based grouting material of the present invention, the water-soluble high molecular polymer may include one or a combination of two or more of starch, xanthan gum, guar gum, polyanionic cellulose, sodium carboxymethyl cellulose, hydroxyethyl cellulose, polyacrylamide, and partially hydrolyzed polyacrylamide.
In one exemplary embodiment of the viscosity modifier for cement-based grouting material of the present invention, the antifoaming agent may be a powdered silicone antifoaming agent.
In one exemplary embodiment of the viscosity modifier for cement-based grouting material of the present invention, the water-soluble modifier may be sodium carbonate.
In an exemplary embodiment of the viscosity modifier for cement-based grouting material of the present invention, the ratio of the viscosity modifier to the cement-based grouting material may be (1-2): 99 by weight.
Another aspect of the present invention provides a method for preparing a viscosity modifier for a cement-based grouting material, which may include the steps of: uniformly mixing 5-20 parts of layered silicate mineral, 0.2-3.0 parts of water-soluble high molecular polymer and 0.5-2.0 parts of defoaming agent by weight to obtain a mixture; mixing 0.1-0.2 part of water solution regulator with 80-90 parts of water to obtain a regulator solution; and mixing the mixture with the regulator solution, stirring, and sealing and standing at room temperature to obtain the viscosity regulator for the cement-based grouting material.
In one exemplary embodiment of the method for preparing a viscosity modifier for cement-based grouting materials of the present invention, the phyllosilicate mineral may be constructed in two-dimensional arrangement of aluminum or magnesium oxide octahedrons and silicon oxide tetrahedrons constituting different structural layers according to 1.
In an exemplary embodiment of the method for preparing a viscosity modifier for cement-based grouting material of the present invention, the stirring speed may be 2500 rpm to 3500 rpm. Further, the stirring speed may be 3000 rpm.
In one exemplary embodiment of the method for preparing a viscosity modifier for cement-based grouting materials of the present invention, the phyllosilicate mineral may be a natural phyllosilicate mineral, and the phyllosilicate mineral may include one or a combination of two or more of kaolinite, montmorillonite, illite, and muscovite.
In one exemplary embodiment of the method for preparing a viscosity modifier for cement-based grouting materials of the present invention, the water-soluble high molecular polymer may include one or a combination of two or more of starch, xanthan gum, guar gum, polyanionic cellulose, sodium carboxymethyl cellulose, hydroxyethyl cellulose, polyacrylamide, and partially hydrolyzed polyacrylamide.
In one exemplary embodiment of the method for preparing a viscosity modifier for cement-based grouting material of the present invention, the defoamer may be a powdered silicone defoamer and the water-soluble modifier may be sodium carbonate.
Compared with the prior art, the invention has the beneficial effects that:
(1) The viscosity regulator for the cement-based grouting material is simple in preparation and use of raw materials, low in raw material cost, capable of realizing the expansion of the field of mineral deep processing and capable of embodying the concept of high-quality and high-efficiency utilization of resources; the preparation process is fine, and the shortage of the layered silicate mineral material deep-processed product can be effectively solved;
(2) The viscosity regulator can improve the workability of the grouting material during the mixing process of adding water, can keep good fluidity and no segregation and bleeding of the grouting material, can improve the durability of the hardened grouting material, and can expand the application range of layered silicate mineral materials with rich reserves in China;
(3) The viscosity regulator takes the natural layered silicate minerals with rich reserves as main raw materials, has dispersion suspension property and thixotropy, can be stored for a long time without deterioration, can regulate and control the yield stress and the plastic viscosity of the cement-based grouting material by utilizing the viscosity regulator, plays roles of preventing sedimentation and bleeding, can keep good compatibility with a polycarboxylic acid water reducing agent, and can remarkably improve the stability, the cohesiveness and the robustness of the cement-based grouting material in a plastic stage;
(4) The preparation method of the viscosity regulator disclosed by the invention is simple in preparation process, synthesis modification means such as heating and pressurizing are not needed, the selected raw materials are all water-soluble substances, no waste is discharged, and the preparation method is an environment-friendly preparation process.
Drawings
The above and other objects and features of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic flow chart illustrating a method for preparing a viscosity modifier for cement-based grouting material according to an exemplary embodiment of the present invention.
Detailed Description
Hereinafter, a viscosity regulator for cement-based grouting material and a method for preparing the same according to the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments.
Fig. 1 is a schematic flow chart illustrating a method for preparing a viscosity modifier for cement-based grouting according to an exemplary embodiment of the present invention.
An aspect of the present invention provides a viscosity modifier for cement-based grouting materials, which, in an exemplary embodiment of the viscosity modifier for cement-based grouting materials of the present invention, may be made of the following raw materials in parts by weight: 5 to 20 parts of layered silicate mineral, 0.2 to 3.0 parts of water-soluble high molecular polymer, 0.5 to 2.0 parts of defoaming agent, 80 to 90 parts of water and 0.1 to 0.2 part of aqueous solution regulator. Further, the viscosity regulator can be prepared from the following raw materials in parts by weight: 5 to 18 parts of layered silicate mineral, 0.2 to 2.7 parts of water-soluble high molecular polymer, 0.5 to 1.5 parts of defoaming agent, 80 to 90 parts of water and 0.1 to 0.2 part of aqueous solution regulator. Furthermore, the viscosity regulator can be prepared from the following raw materials in parts by weight: 7 to 18 parts of layered silicate mineral, 0.4 to 2.7 parts of water-soluble high molecular polymer, 0.8 to 1.5 parts of defoaming agent, 85 to 90 parts of water and 0.1 to 0.2 part of aqueous solution regulator. For example, the viscosity regulator comprises the following components in parts by weight: 15 parts of layered silicate mineral, 2.5 parts of water-soluble high molecular polymer, 0.9 part of defoaming agent, 88 parts of water and 0.15 part of aqueous solution regulator. The viscosity regulator comprises calcium dioxide, aluminum oxide, calcium oxide, magnesium oxide and other substance components.
In this example, the present invention was made to prepare a viscosity modifier for cement-based grouting material using a layered silicate mineral as a main raw material. The main structural units of the phyllosilicate mineral used in the invention can be two-dimensionally arranged silicon-oxygen tetrahedra and aluminum (or magnesium) oxygen octahedra. The two building blocks can be composed of different structural layers according to a silicon-oxygen tetrahedron, wherein the aluminum (or magnesium) oxygen octahedron is 1 or 2. The structural layers may be connected together, typically by van der waals forces. The intermolecular force is weak, and water molecules easily enter between unit cell layers to swell or peel. Therefore, the special layered structure ensures that the layered silicate used by the invention has better water-absorbing expansibility, dispersion suspensibility and thixotropy, and the viscosity of sol formed after water absorption is reduced during stirring, thereby being beneficial to the fluidity of cement-based grouting materials; the gel formed after standing enables the viscosity to be increased, and is beneficial to preventing the cement particles and the aggregate from sinking and the free water from being separated out; when external force is applied again for stirring, the gel structure can be broken rapidly, and the fluidity is restored.
In this embodiment, the layered silicate mineral may be a natural layered silicate mineral. The phyllosilicate mineral can comprise one or more of kaolinite, montmorillonite, illite, and muscovite. Of course, the layered silicate mineral of the present invention is not limited thereto, and may be, for example, vermiculite, serpentine, or the like.
In this embodiment, the water-soluble high molecular polymer may include one or a combination of two or more of starch, xanthan gum, guar gum, polyanionic cellulose, sodium carboxymethyl cellulose, hydroxyethyl cellulose, polyacrylamide, and partially hydrolyzed polyacrylamide. Of course, the water-soluble polymer of the present invention is not limited thereto, and for example, the water-soluble polymer used in the present invention may increase the viscosity of the viscosity modifier of the present invention. The long-chain molecules of the water-soluble high molecular polymer adsorb and fix free water molecules, so that the apparent volume of the solution is increased due to water absorption expansion, and finally the viscosity of the solution is increased
In this embodiment, the defoamer may be a powdered silicone defoamer. Of course, the defoaming agent of the present invention is not limited thereto, and it is sufficient if bubbles already formed in the system are eliminated and generation of new bubbles is suppressed.
In this embodiment, the water-soluble modifier may be sodium carbonate. Further, the sodium carbonate is 200-mesh industrial grade sodium carbonate. Of course, the water-soluble regulator of the present invention is not limited thereto, and may be used for regulating the hardness of water, or for increasing the stability of the viscosity regulator.
In this embodiment, the component water in the viscosity modifier for cement-based grouting material may be deionized water.
In this embodiment, the viscosity modifier for cement-based grouting material may be prepared by mixing a layered silicate mineral, a water-soluble high molecular polymer, an antifoaming agent, water, and an aqueous solution modifier. Further, the water-soluble polymer can be prepared by mixing the phyllosilicate mineral, the water-soluble high molecular polymer and the defoaming agent, and then mixing the mixture with water and an aqueous solution regulator.
In this embodiment, the ratio of the viscosity modifier to the cement-based grouting material may be (1-2): 99 by weight. For example, it may be 1.5.
Another aspect of the present invention provides a method for preparing a viscosity modifier for cement-based grouting material, which, in an exemplary embodiment of the method for preparing a viscosity modifier for cement-based grouting material of the present invention, as shown in fig. 1, may include:
and S01, uniformly mixing 5 to 20 parts by weight of layered silicate mineral, 0.2 to 3.0 parts by weight of water-soluble high molecular polymer and 0.5 to 2.0 parts by weight of defoaming agent to obtain a mixture.
In this embodiment, the phyllosilicate mineral, the water-soluble high molecular polymer, and the antifoaming agent may be phyllosilicate mineral, water-soluble high molecular polymer, and an antifoaming agent as described in the exemplary embodiment of the viscosity modifier for cement-based grouting material.
In this embodiment, for example, the layered silicate mineral may be 4 to 18 parts, the water-soluble high molecular polymer may be 0.3 to 2.9 parts, and the defoaming agent may be 0.7 to 1.8 parts.
And S02, mixing 0.1-0.2 part of aqueous solution regulator with 80-90 parts of water to obtain a regulator solution.
In this embodiment, the aqueous solution conditioning agent may be a water-soluble conditioning agent as described above. The water may be deionized water.
And S03, mixing the mixture with the regulator solution, stirring, sealing and standing at room temperature to obtain the viscosity regulator for the cement-based grouting material.
In this example, the stirring may be performed at a rotation speed of 2500 rpm to 3500 rpm. Further, the stirring may be carried out at a rotation speed of 3000 rpm. The shearing action force generated by the stirring speed can ensure that the interlayer space of the phyllosilicate mineral is opened, so that mineral particles stably exist in the solution, and the particles are not aggregated and settled due to overlarge shearing action force. The stirring time can be up to stirring evenly. For example, the stirring time may be 20 minutes to 40 minutes. The sealing standing time under the greenhouse may be 18 hours to 30 hours, and for example, the standing time may be 24 hours.
In this embodiment, the ratio of the viscosity modifier to the cement-based grouting material may be (1-2): 99 by weight. For example, it may be 1.7.
As described above, the sequence of step S01 and step S02 is not described, and step S01 and step S02 may be performed simultaneously.
In order that the above-described exemplary embodiments of the invention may be better understood, further description thereof with reference to specific examples is provided below.
Example 1
The viscosity regulator for the cement-based grouting material comprises the following components in parts by weight: 5 parts of montmorillonite, 5 parts of kaolinite, 0.3 part of starch, 0.5 part of defoamer, 0.1 part of sodium carbonate and 80 parts of deionized water.
The preparation method of the viscosity regulator for the cement-based grouting material comprises the following steps:
uniformly mixing 5 parts of montmorillonite, 5 parts of kaolinite, 0.3 part of starch and 0.5 part of defoaming agent in parts by weight to obtain a mixture;
mixing 0.1 part of sodium carbonate and 80 parts of deionized water to obtain a regulator solution;
and mixing the mixture with the regulator solution, stirring at 2500 rpm, and then sealing and standing at room temperature for 24 hours to obtain the viscosity regulator for the cement-based grouting material.
Example 2
The viscosity regulator for the cement-based grouting material comprises the following components in parts by weight: 10 parts of montmorillonite, 5 parts of kaolinite, 0.2 part of xanthan gum, 0.5 part of defoamer, 0.1 part of sodium carbonate and 80 parts of deionized water.
The preparation method of the viscosity regulator for the cement-based grouting material comprises the following steps:
uniformly mixing 10 parts by weight of montmorillonite, 5 parts by weight of kaolinite, 0.2 part by weight of xanthan gum and 0.5 part by weight of defoaming agent to obtain a mixture;
mixing 0.1 part of sodium carbonate and 80 parts of deionized water to obtain a regulator solution;
and mixing the mixture with the regulator solution, stirring at 3000 rpm, sealing and standing at room temperature for 24 hours to obtain the viscosity regulator for the cement-based grouting material.
Example 3
The viscosity regulator for the cement-based grouting material comprises the following components in parts by weight: 10 parts of illite, 5 parts of kaolinite, 0.5 part of guar gum, 1.5 parts of defoaming agent, 0.1 part of sodium carbonate and 90 parts of deionized water.
The preparation method of the viscosity regulator for the cement-based grouting material comprises the following steps:
uniformly mixing 10 parts of illite, 5 parts of kaolinite, 0.5 part of guar gum and 1.5 parts of defoaming agent in parts by weight to obtain a mixture;
mixing 0.1 part of sodium carbonate and 90 parts of deionized water to obtain a regulator solution;
and mixing the mixture with the regulator solution, stirring at 3500 rpm, and sealing and standing at room temperature for 24 hours to obtain the viscosity regulator for the cement-based grouting material.
Example 4
The viscosity regulator for the cement-based grouting material comprises the following components in parts by weight: 10 parts of montmorillonite, 10 parts of illite, 0.4 part of sodium carboxymethylcellulose, 1.0 part of defoaming agent, 0.2 part of sodium carbonate and 85 parts of deionized water.
The preparation method of the viscosity regulator for the cement-based grouting material comprises the following steps:
uniformly mixing 10 parts by weight of illite, 10 parts by weight of montmorillonite, 0.4 part by weight of sodium carboxymethylcellulose and 1.0 part by weight of defoaming agent to obtain a mixture;
mixing 0.2 part of sodium carbonate and 85 parts of deionized water to obtain a regulator solution;
and mixing the mixture with the regulator solution, stirring at 3000 rpm, sealing and standing at room temperature for 24 hours to obtain the viscosity regulator for the cement-based grouting material.
Example 5
The viscosity regulator for the cement-based grouting material comprises the following components in parts by weight: 5 parts of muscovite, 15 parts of kaolinite, 0.2 part of polyanionic cellulose, 1.5 parts of defoaming agent, 0.1 part of sodium carbonate and 90 parts of deionized water.
The preparation method of the viscosity regulator for the cement-based grouting material comprises the following steps:
uniformly mixing 5 parts of muscovite, 15 parts of kaolinite, 0.2 part of polyanionic cellulose and 1.5 parts of defoaming agent in parts by weight to obtain a mixture;
mixing 0.1 part of sodium carbonate and 90 parts of deionized water to obtain a regulator solution;
and mixing the mixture with the regulator solution, stirring at 3000 rpm, and then sealing and standing at room temperature for 24 hours to obtain the viscosity regulator for the cement-based grouting material.
Example 6
The viscosity regulator for the cement-based grouting material comprises the following components in parts by weight: 10 parts of muscovite, 10 parts of montmorillonite, 0.1 part of polyacrylamide, 1.0 part of defoaming agent, 0.2 part of sodium carbonate and 90 parts of deionized water.
The preparation method of the viscosity regulator for the cement-based grouting material comprises the following steps:
uniformly mixing 10 parts by weight of muscovite, 10 parts by weight of montmorillonite, 0.1 part by weight of polyacrylamide and 1.0 part by weight of defoamer to obtain a mixture;
mixing 0.2 part of sodium carbonate and 90 parts of deionized water to obtain a regulator solution;
and mixing the mixture with the regulator solution, stirring at 3000 rpm, sealing and standing at room temperature for 24 hours to obtain the viscosity regulator for the cement-based grouting material.
Example 7
The cement-based grouting material has a bleeding rate of 0 which is clearly specified in GB/T50448-2015 technical Specification for application of cement-based grouting materials, and has good fluidity and fluidity maintaining capability. The viscosity regulator is used as a regulator of cement-based grouting materials, and the concrete mixture ratio of the cement-based grouting materials is that ordinary portland cement P.O42.5R400 g, an expanding agent 20 g, silica fume 10 g, a water reducing agent 2.8 g, the viscosity regulator of the invention 10 g, sand (continuous graded river sand below 0.9 mm) 557.2 g and water consumption 125 g. The viscosity regulator is directly obtained from slurry (obtained by mixing and stirring a mixture and a regulator solution) prepared by sealing and standing for 24 hours at room temperature. The results of the obtained performance data of the cement-based grouting material are detailed in table 1.
Table 1 cement-based grouting material performance data
Example 8
The cement-based grouting material has a bleeding rate of 0 which is clearly specified in GB/T50448-2015 technical Specification for application of cement-based grouting materials, and has good fluidity and fluidity maintaining capability. The viscosity regulator is used as a regulator of a cement-based grouting material, and the concrete mixture ratio of the cement-based grouting material is that ordinary portland cement P.O42.5R400 g, an expanding agent 20 g, silica fume 10 g, a water reducing agent 1.8 g, the viscosity regulator of the invention is 15 g, sand (continuous graded river sand below 2.0 mm) 552.2 g, and the water consumption is 120 g. The viscosity regulator is directly obtained from slurry (obtained by mixing and stirring a mixture and a regulator solution) prepared by sealing and standing for 24 hours at room temperature, and the obtained performance data result of the cement-based grouting material is detailed in table 2.
Table 2 performance data for cement-based grouting materials
As can be seen from table 1 and table 2 above, the cement-based grouting material having good fluidity and flow retention ability and no bleeding segregation phenomenon can be prepared using the viscosity modifier of the present invention. In the preparation process of the cement-based grouting material, as the welan gum cannot be compatible with the polycarboxylic acid water reducer, the welan gum cannot be used, and the cellulose ether cannot be used due to the excessive retardation on cement to influence the strength of the grouting material after hardening.
In conclusion, the viscosity regulator for the cement-based grouting material has the advantages of simple preparation raw materials and fine preparation process, and can effectively solve the problem of the lack of deep-processed products of natural layered silicate mineral materials; the workability of the grouting material during the mixing process by adding water can be improved, the grouting material can keep good fluidity, has no segregation and bleeding, the durability of the hardened material can be improved, and the application range of the layered silicate mineral material with abundant reserves in China can be enlarged; the preparation process is simple, synthetic modification means such as heating, pressurizing and the like are not needed, the selected raw materials are all water-soluble, no waste is discharged, and the preparation process is a green preparation process.
Although the present invention has been described above in connection with exemplary embodiments, it will be apparent to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (5)
1. A viscosity regulator for cement-based grouting material, the bleeding rate of which is 0, is characterized in that,
the viscosity regulator is prepared from the following raw materials in parts by weight: 5 to 20 portions of layered silicate mineral, 0.2 to 3.0 portions of water-soluble high molecular polymer, 0.5 to 2.0 portions of defoaming agent, 80 to 90 portions of water, 0.1 to 0.2 portion of aqueous solution regulator,
the layered silicate mineral is a natural layered silicate mineral, the layered silicate mineral takes aluminum or magnesium oxide octahedrons and silicon oxide tetrahedrons which are arranged in two dimensions as construction units, the aluminum or magnesium oxide octahedrons and the silicon oxide tetrahedrons form different structural layers according to a ratio of 1;
the water-soluble high molecular polymer comprises one or the combination of more than two of starch, xanthan gum, guar gum, polyanionic cellulose, polyacrylamide and partially hydrolyzed polyacrylamide;
the defoaming agent is a powdery organic silicon defoaming agent; the aqueous solution regulator is sodium carbonate; the use ratio of the viscosity regulator to the cement-based grouting material is (1 to 2) 99 by weight;
the preparation method of the viscosity regulator comprises the following steps:
uniformly mixing 5-20 parts by weight of phyllosilicate mineral, 0.2-3.0 parts by weight of water-soluble high molecular polymer and 0.5-2.0 parts by weight of defoaming agent to obtain a mixture;
mixing 0.1-0.2 part of an aqueous solution regulator with 80-90 parts of water to obtain a regulator solution;
and mixing the mixture with the regulator solution, stirring at the rotating speed of 2500-3500 rpm for 20-40 minutes, and then sealing and standing at room temperature for 18-30 hours to obtain the viscosity regulator for the cement-based grouting material.
2. The viscosity modifier for cement-based grouting material according to claim 1, wherein the phyllosilicate mineral is a natural phyllosilicate mineral, and the phyllosilicate mineral includes one or a combination of two or more of kaolinite, montmorillonite, illite, and muscovite.
3. A preparation method of a viscosity regulator for cement-based grouting materials, wherein the bleeding rate of the cement-based grouting materials is 0, is characterized by comprising the following steps:
uniformly mixing 5-20 parts by weight of phyllosilicate mineral, 0.2-3.0 parts by weight of water-soluble high molecular polymer and 0.5-2.0 parts by weight of defoaming agent to obtain a mixture;
mixing 0.1-0.2 part of an aqueous solution regulator with 80-90 parts of water to obtain a regulator solution;
mixing the mixture with the regulator solution, stirring at the rotating speed of 2500-3500 rpm for 20-40 minutes, and then sealing and standing at room temperature for 18-30 hours to obtain the viscosity regulator for the cement-based grouting material;
the layered silicate mineral is a natural layered silicate mineral, the layered silicate mineral takes aluminum or magnesium oxide octahedrons and silicon oxide tetrahedrons which are arranged in two dimensions as construction units, the aluminum or magnesium oxide octahedrons and the silicon oxide tetrahedrons form different structural layers according to a ratio of 1;
the water-soluble high molecular polymer comprises one or the combination of more than two of starch, xanthan gum, guar gum, polyanionic cellulose, polyacrylamide and partially hydrolyzed polyacrylamide;
the defoaming agent is a powdery organic silicon defoaming agent; the aqueous solution regulator is sodium carbonate;
the use ratio of the viscosity regulator to the cement-based grouting material is (1 to 2) 99 by weight.
4. The method of preparing a viscosity modifier for cement-based grouting material according to claim 3, wherein the stirring speed is 3000 rpm.
5. The method of preparing a viscosity modifier for cement-based grouting material according to claim 3, wherein the phyllosilicate mineral includes one or a combination of two or more of kaolinite, montmorillonite, illite, and muscovite.
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| CN104402338A (en) * | 2014-11-20 | 2015-03-11 | 中国铁道科学研究院铁道建筑研究所 | Preparation and application of two-component self-compacting concrete for slab ballastless track |
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| CN105503088A (en) * | 2015-12-30 | 2016-04-20 | 北京工业大学 | Special floor concrete suitable for large-area mechanical paving construction |
| CN105776944A (en) * | 2016-03-08 | 2016-07-20 | 上海英杉新材料科技有限公司 | Cement base rheological stabilizing agent and preparation method and application thereof |
| CN106365501A (en) * | 2016-09-09 | 2017-02-01 | 山西科腾环保科技股份有限公司 | Porelike grouting agent and preparation method and use method thereof |
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