A super-active flow enhancer and its preparation method and grouting material

Abstract

The present application provides a super-active flow enhancer and a preparation method thereof and a grouting material, and relates to the technical field of building materials. The super-active flow enhancer includes an active component and water, and the mass ratio of the two is 2: (2.1-2.3); the active component is calculated by mass as 100%, including: 20%-40% of active silicon oxide, 59.46%-79.62% of superfine admixture, 0.3%-0.4% of water reducer, 0.02%-0.04% of thickener, 0.03%-0.05% of stabilizer and 0.03%-0.05% of dispersant. The preparation method of the super-active flow enhancer includes: mixing active silicon oxide, superfine admixture and thickener to obtain a dry powder mixture; then adding a water reducer, a stabilizer and a dispersant to obtain a semi-finished product; continuing to add water and mix to obtain. The super-active flow enhancer of the present application can be made into a grouting material with cement and sand without adding construction water at the construction site, which greatly improves the simplicity of construction.

Description

Technical Field

[0001] The present application relates to the technical field of building materials, and in particular to a super-active flow enhancer, a preparation method thereof, and a grouting material. Background Art

[0002] Since the beginning of the 21st century, with the deepening understanding of sustainable development, the power generation of wind power and photovoltaic power in my country has gradually increased every year, with a year-on-year increase of 21% in 2022. Therefore, under the background of the vigorous development of the new energy photovoltaic industry, the requirements for supporting materials are getting higher and higher, and special wind power and hydropower reinforcement grouting materials have emerged. Among them, wind power, as a large-scale power generation equipment, has a large working range of wind blades, so the height of the wind turbine is generally high, and the installation location is generally located high on the ridge and on the offshore platform, so it is particularly important to reinforce the foot of the wind turbine.

[0003] At present, the mainstream reinforcement method for wind turbines is to transport fresh water and raw materials to the construction site, add water and stir them on site, and then perform grouting reinforcement. Generally, the dry powder raw materials are mixed with water to obtain a slurry with a fluidity of 300mm for use. However, due to the construction technology of the construction personnel, the mixing may not be fully carried out, which makes the quality control uneven, and the construction performance and high strength required for the reinforcement of large equipment such as wind turbines are particularly insufficient. In addition, the construction environment on the top of the mountain and the sea has a large demand for construction water, and the cost of transporting and modifying water lines is high, so how to expand the ease of construction of grouting materials and reduce the cost of transporting water is more urgent. Summary of the invention

[0004] The purpose of the present application is to provide a super-active flow enhancer, a preparation method thereof and a grouting material. By utilizing the water-reducing and flow-increasing properties of the super-active flow enhancer, grouting can be stirred without adding construction water at the construction site, thereby improving the simplicity of construction and ensuring the strength of the slurry after solidification.

[0005] To achieve the above objectives, the technical solution of this application is as follows:

[0006] The present application provides a super active flow enhancer, comprising an active component and water;

[0007] The active components, calculated by mass as 100%, include: 20%-40% active silicon oxide, 59.46%-79.62% superfine admixture, 0.3%-0.4% water reducer, 0.02%-0.04% thickener, 0.03%-0.05% stabilizer and 0.03%-0.05% dispersant;

[0008] The ratio of the mass of the active component to the mass of water is 2:(2.1-2.3).

[0009] Preferably, the active silicon oxide is silica fume with a SiO2 content greater than 92%.

[0010] Preferably, the ultrafine admixture includes fly ash beads, and the activity ratio of the fly ash beads is ≥105%;

[0011] And / or, the fineness of the superfine admixture is 900 mesh-1100 mesh.

[0012] Preferably, the water reducer comprises a polycarboxylate water reducer;

[0013] And / or, the thickener comprises at least one of hydroxypropyl methylcellulose ether and hydroxyethyl methylcellulose;

[0014] And / or, the stabilizer includes a water-soluble polymer prepared from acrylic acid, acrylamide sulfonic acid and saturated acrylic acid ester.

[0015] Preferably, the water reduction amount of the polycarboxylate water reducer is 28%-33%;

[0016] And / or, the viscosity of the hydroxypropyl methylcellulose ether is 400 MPa·s-200000 MPa·s;

[0017] And / or, the stabilizer is Fok D1601 stabilizer.

[0018] Preferably, the dispersant comprises polyvinyl alcohol.

[0019] The present application also provides a method for preparing the above-mentioned superactive flow enhancer, comprising:

[0020] The active silicon oxide, the ultrafine admixture and the thickener are first mixed to obtain a dry powder mixture;

[0021] Adding the water reducing agent, the stabilizer, and the dispersant to the dry powder mixture for a second mixing to obtain a semi-finished flow enhancer;

[0022] The fluidizer semi-finished product and the water are mixed for the third time to obtain the super active fluidizer.

[0023] Preferably, the first mixing, the second mixing and the third mixing each independently include: stirring at a rotation speed of 30 rpm-100 rpm until the mixture is uniformly mixed.

[0024] The present application also provides a grouting material, comprising cement, sand and the above-mentioned super-active flow-increasing agent.

[0025] Preferably, the ratio of the total mass of the cement and the sand to the mass of the active component in the super-active fluidizer is 18:(1.9-2.1);

[0026] And / or, the ratio of the mass of the cement to the mass of the sand is 1:(1-2).

[0027] Beneficial effects of this application:

[0028] The super-active flow enhancer of the present application changes the inherent dry powder form mode by selecting suitable active components to combine with water, and reduces the amount of water used when the super-active flow enhancer is used to reinforce grouting materials at the construction site. In addition, the super-active flow enhancer of the present application improves the strength of cement after solidification by adding the active factor of active silicon oxide; by adding the stabilizer, on the one hand, the effect of the water reducer is stimulated to reduce the amount of water used, and on the other hand, the heavy particles of the slurry can be suspended to maintain the state of the slurry for a long time without changing, which can effectively maintain the performance state of the slurry under low water-cement ratio conditions and extend the damage preservation time of the slurry; by adding the flow-promoting dispersion effect component, that is, the dispersant, the gap between the coupled molecules can be expanded, so that the fluidity of the grouting material is greatly improved compared with the fluidity of the ordinary grouting material, especially the mortar that is easy to harden and difficult to disperse can be easily opened and dispersed, which reduces the difficulty of construction and improves the construction efficiency.

[0029] The preparation method of the super-active flow enhancer of the present application is simple, the production process is easy to control, the raw material cost is low, and it is conducive to large-scale industrial production.

[0030] The grouting material provided in the present application can be used as a special grouting material for reinforcement. The super-active flow enhancer can be directly mixed with cement and sand at the construction site without adding water, thus solving the problem of inconvenient water use at the construction site. DETAILED DESCRIPTION

[0031] As used herein:

[0032] "Prepared from" is synonymous with "comprising." As used herein, the terms "comprising," "including," "having," "containing," or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus comprising the listed elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus. The conjunction "consisting of" excludes any unspecified element, step, or component.

[0033] When an amount, concentration, or other value or parameter is expressed as a range, a preferred range, or a range defined by a series of upper preferred values ​​and lower preferred values, this should be understood as specifically disclosing all ranges formed by any pairing of any range upper limit or preferred value with any range lower limit or preferred value, regardless of whether the range is disclosed separately. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted as including ranges "1 to 4", "1 to 3", "1 to 2", "1 to 2 and 4 to 5", "1 to 3 and 5", etc. When a numerical range is described in this article, unless otherwise stated, the range is intended to include its end values ​​and all integers and fractions within the range.

[0034] In these examples, the parts and percentages are all by mass unless otherwise specified. "And / or" is used to indicate that one or both of the situations described may occur, for example, A and / or B includes (A and B) and (A or B).

[0035] The present application provides a super active flow enhancer, comprising an active component and water. The active component, calculated by mass as 100%, comprises:

[0036] Active silicon oxide 20%-40%, for example, it can be 20%, 25%, 30%, 35%, 40% or any value between 20% and 40%;

[0037] The ultrafine admixture is 59.46%-79.62%, for example, it can be 59.46%, 60%, 65%, 70%, 75%, 79.62% or any value between 59.46% and 79.62%;

[0038] Water reducing agent 0.3%-0.4%, for example, it can be 0.3%, 0.32%, 0.34%, 0.36%, 0.38%, 0.4% or any value between 0.3%-0.4%;

[0039] Thickener 0.02%-0.04%, for example, it can be 0.02%, 0.025%, 0.03%, 0.035%, 0.04% or any value between 0.02%-0.04%;

[0040] Stabilizer 0.03%-0.05%, for example, 0.03%, 0.035%, 0.04%, 0.045%, 0.05% or any value between 0.03%-0.05%;

[0041] The dispersant is 0.03%-0.05%, for example, it can be 0.03%, 0.035%, 0.04%, 0.045%, 0.05% or any value between 0.03% and 0.05%.

[0042] In one embodiment of the present application, the ratio of the mass of the active component in the super active flow enhancer to the mass of water is 2:(2.1-2.3), for example, it can be 2:2.1, 2:2.15, 2:2.2, 2:2.25, 2:2.3 or any value between 2:(2.1-2.3).

[0043] In one embodiment of the present application, the active silicon oxide is silica fume with a SiO2 content greater than 92%.

[0044] In one embodiment of the present application, the ultra-fine admixture includes fly ash beads with an activity ratio of ≥105%; the fineness of the ultra-fine admixture is 900 mesh-1100 mesh.

[0045] In one embodiment of the present application, the water reducing agent includes a polycarboxylate water reducing agent, and the water reducing amount is 28%-33%.

[0046] In one embodiment of the present application, the thickener includes at least one of hydroxypropyl methylcellulose ether and hydroxyethyl methylcellulose; wherein the viscosity of the hydroxypropyl methylcellulose ether is 400 MPa·s-200000 MPa·s.

[0047] In one embodiment of the present application, the stabilizer includes a water-soluble polymer prepared from acrylic acid, acrylamide sulfonic acid and saturated acrylic acid ester, specifically Fok D1601 stabilizer.

[0048] In one embodiment of the present application, the dispersant includes polyvinyl alcohol.

[0049] The present application provides a method for preparing the above-mentioned superactive flow enhancer, comprising:

[0050] S1, performing a first mixing of the active silicon oxide, the ultrafine admixture and the thickener to obtain a dry powder mixture;

[0051] S2, adding the water reducing agent, the stabilizer, and the dispersant to the dry powder mixture for a second mixing to obtain a semi-finished flow enhancer;

[0052] S3, performing a third mixing of the fluidizer semi-finished product and the water to obtain the superactive fluidizer.

[0053] In one embodiment of the present application, the first mixing, the second mixing and the third mixing independently include: stirring at a speed of 30 rpm to 100 rpm until the mixture is uniformly mixed. Generally, the stirring time is 2 min to 10 min, but when too much material needs to be stirred, the stirring time can be appropriately extended.

[0054] In one embodiment of the present application, the mass ratio of the fluid enhancer semi-finished product in S2 to the water in S3 is 1:1.1.

[0055] The present application also provides a grouting material, comprising cement, sand and the above-mentioned super-active flow-increasing agent.

[0056] In one embodiment of the present application, the ratio of the total mass of cement and sand in the grouting material to the mass of the active component in the super-active fluidizer is 18:(1.9-2.1).

[0057] Further preferably, the ratio of the total mass of cement and sand to the mass of the active components in the super-active fluidizer is 9:1.

[0058] In one embodiment of the present application, the ratio of the mass of cement to the mass of sand in the grouting material is 1:(1-2); more preferably 1:1.

[0059] The embodiments of the present application will be described in detail below in conjunction with specific examples, but it will be appreciated by those skilled in the art that the following examples are only used to illustrate the present application and should not be considered as limiting the scope of the present application. If specific conditions are not specified in the examples, they are carried out according to normal conditions or the conditions recommended by the manufacturer. If the manufacturer is not specified for the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0060] Example 1

[0061] This embodiment provides 4.2 kg of a super active flow enhancer, including 2 kg of an active ingredient and 2.2 kg of water, and the preparation method thereof comprises:

[0062] (1) Add three components, namely, 0.4 kg of active silicon oxide (silicon ash with SiO2 content > 92%) with a mass ratio of 20%, 1.5922 kg of ultrafine admixture (the admixture is fly ash beads with an activity ratio ≥ 105% and a fineness of 1000 mesh) with a mass ratio of 79.61%, and 0.0006 kg of hydroxypropyl methylcellulose ether (viscosity of 10000 MPa·s) with a mass ratio of 0.03%, into a mixer, stir at a speed of 50 r / min for 10 min, and obtain a dry powder mixture after stirring evenly.

[0063] (2) 0.006 kg of 0.3% by weight polycarboxylic acid water reducer, 0.0006 kg of 0.03% by weight Fok D1601 stabilizer, and 0.0006 kg of 0.03% by weight polyvinyl alcohol were added to the dry powder mixture obtained in step (1), and stirred at a speed of 50 r / min for 10 min. After stirring evenly, a semi-finished flow enhancer was obtained.

[0064] (3) The semi-finished fluidizer obtained in step (2) is stirred with 2.2 kg of water at a stirring speed of 50 r / min for 10 min to obtain a finished super-active fluidizer.

[0065] This embodiment also provides a special grouting material for reinforcement, including 9 kg of silicate #52.5 cement, 9 kg of refined sand and 4.2 kg of the super-active flow enhancer prepared in this embodiment.

[0066] Example 2

[0067] This embodiment provides 4.2 kg of a super active flow enhancer, including 2 kg of an active ingredient and 2.2 kg of water, and the preparation method thereof comprises:

[0068] (1) Add three components, namely, 0.4 kg of active silicon oxide (silicon ash with SiO2 content > 92%) with a mass ratio of 20%, 1.5902 kg of ultrafine admixture (the admixture is fly ash beads with an activity ratio ≥ 105% and a fineness of 1000 mesh) with a mass ratio of 79.51%, and 0.0006 kg of hydroxypropyl methylcellulose ether (viscosity of 10000 MPa·s) with a mass ratio of 0.03%, into a mixer, stir at a speed of 50 r / min for 10 min, and obtain a dry powder mixture after stirring evenly.

[0069] (2) 0.008 kg of 0.4% by weight of polycarboxylic acid water-reducing agent, 0.0006 kg of 0.03% by weight of Fok D1601 stabilizer, and 0.0006 kg of 0.03% by weight of polyvinyl alcohol were added to the dry powder mixture obtained in step (1), and stirred at a speed of 50 r / min for 10 min. After stirring evenly, a semi-finished flow enhancer was obtained.

[0070] (3) The semi-finished fluidizer obtained in step (2) is stirred with 2.2 kg of water at a stirring speed of 50 r / min for 10 min to obtain a finished super-active fluidizer.

[0071] This embodiment also provides a special grouting material for reinforcement, including 9 kg of silicate #52.5 cement, 9 kg of refined sand and 4.2 kg of the super-active flow enhancer prepared in this embodiment.

[0072] Example 3

[0073] This embodiment provides a super-active flow enhancer and a special grouting material for reinforcement, wherein the preparation method of the super-active flow enhancer is the same as that of Embodiment 2, except that:

[0074] The mass proportion of active silicon oxide in step (1) is 30%, and the mass proportion of ultrafine admixture is 69.51%; the other raw materials remain unchanged.

[0075] Example 4

[0076] This embodiment provides a super-active flow enhancer and a special grouting material for reinforcement, wherein the preparation method of the super-active flow enhancer is the same as that of Embodiment 2, except that:

[0077] The active silicon oxide in step (1) accounts for 40% by mass, and the ultrafine admixture accounts for 59.51% by mass; the other raw materials remain unchanged.

[0078] Example 5

[0079] This embodiment provides a super-active flow enhancer and a special grouting material for reinforcement, wherein the preparation method of the super-active flow enhancer is the same as that of Embodiment 2, except that:

[0080] The active silicon oxide in step (1) accounts for 40% by mass and the ultrafine admixture accounts for 59.49% by mass;

[0081] In step (2), the mass proportion of the stabilizer Fok D1601 is 0.04%, and the mass proportion of polyvinyl alcohol is 0.04%; the other raw materials remain unchanged.

[0082] Example 6

[0083] This embodiment provides a super-active flow enhancer and a special grouting material for reinforcement, wherein the preparation method of the super-active flow enhancer is the same as that of Embodiment 2, except that:

[0084] In step (1), the active silicon oxide accounts for 40% by mass and the ultrafine admixture accounts for 59.47% by mass;

[0085] In step (2), the mass proportion of the stabilizer Fok D1601 is 0.05%, and the mass proportion of polyvinyl alcohol is 0.05%; the other raw materials remain unchanged.

[0086] Example 7

[0087] This embodiment provides 4.1 kg of a super active flow enhancer, comprising 2 kg of an active ingredient and 2.1 kg of water. The preparation method is the same as that of Example 6, except that the mass of water in step (3) is 2.1 kg; the other raw materials remain unchanged.

[0088] This embodiment also provides a special grouting material for reinforcement, including 6 kg of silicate #52.5 cement, 12 kg of refined sand and 4.1 kg of the super-active flow enhancer prepared in this embodiment.

[0089] Example 8

[0090] This embodiment provides 4.3 kg of a super active flow enhancer, comprising 2 kg of an active ingredient and 2.3 kg of water. The preparation method is the same as that of embodiment 6, except that the mass of water in step (3) is 2.3 kg; the other raw materials remain unchanged.

[0091] This embodiment also provides a special grouting material for reinforcement, including 8 kg of silicate #52.5 cement, 10 kg of refined sand and 4.3 kg of the super-active flow enhancer prepared in this embodiment.

[0092] Comparative Example 1

[0093] This comparative example provides a common grouting material, including 9.5 kg of silicate #52.5 cement, 9.5 kg of refined sand and 2.2 kg of water.

[0094] Comparative Example 2

[0095] This comparative example provides a super-active flow enhancer and grouting material similar to Example 1, except that the mass proportion of active silicon oxide is 10%, and the mass proportion of super-fine admixture is 89.61%.

[0096] Comparative Example 3

[0097] This comparative example provides a super-active flow enhancer and grouting material similar to Example 1, except that the mass proportion of active silicon oxide is 15%, and the mass proportion of super-fine admixture is 84.61%.

[0098] Comparative Example 4

[0099] This comparative example provides a super-active flow enhancer and grouting material similar to Example 1, except that the mass proportion of active silicon oxide is 42%, and the mass proportion of super-fine admixture is 47.61%.

[0100] Comparative Example 5

[0101] This comparative example provides 4 kg of a super active flow enhancer, comprising 2 kg of an active ingredient and 2 kg of water. The preparation method is the same as that of Example 1, except that the mass of water in step (3) is 2 kg; the other raw materials remain unchanged.

[0102] This comparative example also provides a grouting material, which includes 9 kg of silicate #52.5 cement, 9 kg of refined sand and 4 kg of the super-active flow enhancer prepared in this comparative example.

[0103] The grouting materials prepared in each embodiment and comparative example were subjected to performance tests, and the test results are shown in Table 1.

[0104] Table 1 Test results of grouting materials prepared in various embodiments and comparative examples

[0105]

[0106] As shown in Table 1, after adding the super-active flow enhancer, the initial fluidity of the grouting material is significantly expanded to between 350-365 mm, which is a significant increase compared to 300 mm of the common grouting material. In the examples, we found that the strength of the common grouting material is generally between 60-90 MPa by adjusting the amount of active silicon oxide added, while after adding the super-active flow enhancer in the examples of the present application, the strength is significantly improved to between 130-147 MPa, which is 40-50 MPa higher than the above. The construction is convenient and the transportation cost is saved.

[0107] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0108] In addition, those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, any of the above-mentioned claimed embodiments may be used in any combination. The information disclosed in this background technology section is intended only to deepen the understanding of the overall background technology of the present application and should not be regarded as an admission or in any form of implication that the information constitutes prior art known to those skilled in the art.

Claims

1. A super active flow enhancer, characterized in that: comprising active ingredients and water; The active components, calculated by mass as 100%, include: 20%-40% active silicon oxide, 59.46%-79.62% superfine admixture, 0.3%-0.4% water reducer, 0.02%-0.04% thickener, 0.03%-0.05% stabilizer and 0.03%-0.05% dispersant; The active silicon oxide is silicon ash with SiO2 content greater than 92%; The ultra-fine admixture is fly ash beads, and the fineness of the ultra-fine admixture is 900 mesh-1100 mesh; The stabilizer is Fuke D1601 stabilizer; The ratio of the mass of the active component to the mass of water is 2:(2.1-2.3).

2. The superactive flow enhancer according to claim 1, characterized in that The activity ratio of the fly ash beads is ≥105%.

3. The superactive flow enhancer according to claim 1, characterized in that The water reducer includes a polycarboxylate water reducer; And / or, the thickener includes at least one of hydroxypropyl methylcellulose ether and hydroxyethyl methylcellulose.

4. The superactive flow-increasing agent according to claim 3, characterized in that The water reduction amount of the polycarboxylate water reducer is 28%-33%; And / or, the viscosity of the hydroxypropyl methylcellulose ether is 400 mPa•s-200000 mPa•s.

5. The superactive flow enhancer according to any one of claims 1 to 4, characterized in that The dispersant includes polyvinyl alcohol.

6. A method for preparing the superactive flow enhancer according to any one of claims 1 to 5, characterized in that: include: The active silicon oxide, the ultrafine admixture and the thickener are first mixed to obtain a dry powder mixture; Adding the water reducing agent, the stabilizer, and the dispersant to the dry powder mixture for a second mixing to obtain a semi-finished flow enhancer; The fluidizer semi-finished product and the water are mixed for the third time to obtain the super active fluidizer.

7. The preparation method according to claim 6, characterized in that: The first mixing, the second mixing and the third mixing each independently include: Stir at 30-100 rpm until well mixed.

8. A grouting material, characterized in that: The invention comprises cement, sand and the superactive flow enhancer described in any one of claims 1 to 5 or the superactive flow enhancer prepared by the preparation method described in any one of claims 6 to 7.

9. The grouting material according to claim 8, characterized in that: The ratio of the total mass of the cement and the sand to the mass of the active component in the super-active fluidizer is 18:(1.9-2.1); And / or, the ratio of the mass of the cement to the mass of the sand is 1:(1-2).

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