CN115385638A - Functional early strength cement-based grouting material and preparation method thereof - Google Patents
Functional early strength cement-based grouting material and preparation method thereof Download PDFInfo
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- 239000004568 cement Substances 0.000 title claims abstract description 75
- 239000000463 material Substances 0.000 title claims abstract description 53
- 238000002360 preparation method Methods 0.000 title description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 22
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000004576 sand Substances 0.000 claims abstract description 17
- 239000003112 inhibitor Substances 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 15
- 239000011707 mineral Substances 0.000 claims abstract description 15
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 15
- 239000006254 rheological additive Substances 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims description 29
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- 239000002994 raw material Substances 0.000 claims description 13
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims description 10
- 238000005303 weighing Methods 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims description 5
- 229910052808 lithium carbonate Inorganic materials 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- RAFRTSDUWORDLA-UHFFFAOYSA-N phenyl 3-chloropropanoate Chemical compound ClCCC(=O)OC1=CC=CC=C1 RAFRTSDUWORDLA-UHFFFAOYSA-N 0.000 claims description 5
- 229920002401 polyacrylamide Polymers 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 235000010288 sodium nitrite Nutrition 0.000 claims description 5
- 229920001285 xanthan gum Polymers 0.000 claims description 5
- 229940082509 xanthan gum Drugs 0.000 claims description 5
- 235000010493 xanthan gum Nutrition 0.000 claims description 5
- 239000000230 xanthan gum Substances 0.000 claims description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical group [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052744 lithium Inorganic materials 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229920000877 Melamine resin Polymers 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 150000004645 aluminates Chemical class 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 150000001282 organosilanes Chemical group 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 3
- 238000007569 slipcasting Methods 0.000 claims 3
- 238000000034 method Methods 0.000 claims 2
- 239000012754 barrier agent Substances 0.000 claims 1
- 239000002002 slurry Substances 0.000 abstract description 12
- 238000010276 construction Methods 0.000 abstract description 8
- 239000004566 building material Substances 0.000 abstract description 5
- 239000002910 solid waste Substances 0.000 abstract description 3
- 230000035699 permeability Effects 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 4
- 238000004873 anchoring Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 235000019353 potassium silicate Nutrition 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229910001415 sodium ion Inorganic materials 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 230000003487 anti-permeability effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
-
- C—CHEMISTRY; METALLURGY
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- C—CHEMISTRY; METALLURGY
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00293—Materials impermeable to liquids
-
- C—CHEMISTRY; METALLURGY
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- C—CHEMISTRY; METALLURGY
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2015—Sulfate resistance
-
- C—CHEMISTRY; METALLURGY
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- C—CHEMISTRY; METALLURGY
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention belongs to the field of special cement-based building materials, and discloses a functional early-strength cement-based grouting material which is prepared from the following components in parts by weight: 70-85 parts of superfine special cement, 10-25 parts of mineral admixture, 90-105 parts of extra-fine tailing sand, 0.8-1.5 parts of water reducing agent, 0.3-0.6 part of rheological additive, 1.0-1.6 parts of reinforcing agent, 0.1-0.6 part of anti-seepage agent and 0.2-0.7 part of rust inhibitor. The components are uniformly mixed, and then water is added according to the water-material ratio of 0.26-0.28 to be stirred to form uniform slurry, so that grouting construction can be carried out. The cement-based grouting material obtained by the invention has the characteristics of high groutability, micro-expansion, early strength, high strength, permeability resistance, rust resistance and the like, is suitable for grouting construction of various gaps and ducts, eliminates solid wastes, belongs to an environment-friendly building material, and has wide popularization and application prospects.
Description
Technical Field
The invention belongs to the field of special cement-based building materials, and particularly relates to a functional early strength cement-based grouting material and a preparation method thereof.
Background
With the rapid development of building materials and building construction technologies, cement-based grouting materials and grouting, sealing and anchoring and reinforcing technologies are widely applied to projects such as tunnel traffic, foundation reinforcement, water conservancy leakage stoppage, mine restoration and the like. At present, inorganic grouting mainly adopts single-liquid common cement paste, common cement-water glass double-liquid paste, water glass paste and the like as grouting reinforcement in the engineering field. The single-liquid ordinary cement grouting is cement slurry prepared by mixing cement and water according to a certain mass ratio, has poor slurry stability, is easy to bleed and isolate, and has volume shrinkage after hardeningShrinkage, failure to form a good consolidated body, difficulty in ensuring early strength and later strength, failure to meet the requirements of projects with impervious requirements, and the specific surface area of the common cement is generally 350m 2 About/kg, the particles are large, the prepared cement paste is coarse, the cement paste is difficult to penetrate into the depth of a fine crack below 0.05mm, and the impermeability of the whole structure cannot be ensured. The grouting material containing water glass has low early strength, can generate larger linear shrinkage after being solidified, seriously influences the long-term stability of the grouting effect, has unstable chemical structure, can dissolve out a large amount of sodium ions under the condition of contacting flowing water, leads a hardened body to be pulverized, lowers the consolidation strength, and can pollute water resources by the dissolved sodium ions.
Therefore, it is necessary to develop a functional early strength cement-based grouting material for sealing and anchoring of various important and important hydraulic engineering and traffic engineering.
Disclosure of Invention
The invention aims to provide an early strength cement-based grouting material with good filling degree, early strength, high strength, micro expansion and high anti-permeability function aiming at the defects in the prior art.
In order to realize the purpose, the invention adopts the technical scheme that:
a functional early strength cement-based grouting material comprises the following components in parts by weight: 70-85 parts of superfine special cement, 10-25 parts of mineral admixture, 90-105 parts of extra-fine tailing sand, 0.8-1.5 parts of water reducing agent, 0.3-0.6 part of rheological additive, 1.0-1.6 parts of reinforcing agent, 0.1-0.6 part of anti-seepage agent and 0.2-0.7 part of rust inhibitor.
According to the scheme, the superfine special cement is one of quick-hardening sulphoaluminate cement and aluminate cement, and is ground by a stirring mill until the specific surface area is 550-650m 2 /kg。
According to the scheme, the mineral admixture has the specific surface area of not less than 650m 2 Per kg of lithium slag powder.
According to the scheme, the ultra-fine tailing sand is ultra-fine tailing sand which is prepared by mixing copper tailings and iron tailings according to any proportion, crushing and screening, has the maximum particle size of not more than 1.18mm and the fineness modulus of not more than 1.5.
According to the scheme, the water reducing agent is one of a polycarboxylic acid high-efficiency water reducing agent and a melamine high-efficiency water reducing agent.
According to the scheme, the rheological additive is one of polyacrylamide and xanthan gum or is formed by mixing the polyacrylamide and the xanthan gum according to any proportion.
According to the scheme, the reinforcing agent is one of lithium carbonate and lithium hydroxide or is formed by mixing the lithium carbonate and the lithium hydroxide according to any proportion.
According to the scheme, the anti-seepage agent is organic silane.
According to the scheme, the rust inhibitor is one of sodium nitrite and calcium nitrite or is formed by mixing the sodium nitrite and the calcium nitrite according to any proportion.
The preparation method of the functional early strength cement-based grouting material comprises the following steps:
1) Weighing the raw materials according to the proportion, wherein the components in parts by weight comprise: 70-85 parts of superfine special cement, 10-25 parts of mineral admixture, 90-105 parts of extra-fine tailing sand, 0.8-1.5 parts of water reducing agent, 0.3-0.6 part of rheological additive, 1.0-1.6 parts of reinforcing agent, 0.1-0.6 part of anti-seepage agent and 0.2-0.7 part of rust inhibitor.
2) And putting the weighed mineral admixture, the water reducing agent, the rheological aid, the reinforcing agent, the anti-seepage agent and the rust inhibitor into a stirrer, uniformly mixing, putting the superfine special cement into the stirrer, continuously stirring and uniformly mixing, putting the superfine tailing sand into the stirrer, continuously stirring and uniformly mixing, and thus obtaining the functional early-strength cement-based grouting material.
When in use, the functional early strength cement-based grouting material prepared by the invention is added with water according to the water-material ratio of 0.26-0.28 and stirred to form uniform slurry, and grouting construction can be carried out.
Compared with the prior art, the invention has the beneficial effects that:
1) The micro-expanded superfine special cement is adopted, the particles are finer than the traditional cement, the hydration rate is increased, the later strength of the grouting material is ensured, and the early strength is greatly improved. 2) The lithium slag powder which shows high activity in a special cement-based material system is used as an admixture, so that the mechanical property of the grouting material is further improved, and the durability is ensured. 3) The high-efficiency water reducing agent and the rheological additive are matched for use, so that the slurry has excellent volume stability while high fluidity is ensured. 4) And the anti-seepage agent and the rust inhibitor are added to seal the communicating holes of the hardened slurry, so that harmful ions are prevented from diffusing and permeating inwards, and the anti-seepage property and the anti-corrosion property are greatly improved. 5) The ultrafine tailing sand is used as an aggregate filling material, and forms good particle grading with powder, so that the compactness is improved, solid wastes are eliminated, and the environment benefit is good.
The functional early strength cement-based grouting material obtained by the invention has excellent overall performance: the grouting material has the characteristics of high groutability, micro-expansion, early strength, high strength, permeability resistance, rust resistance and the like, has good erosion resistance, is suitable for sealing, anchoring, reinforcing and gap filling of various projects, has good durability, can prolong the service life of the projects, uses solid wastes as partial raw materials, and belongs to environment-friendly building materials.
Detailed Description
In order to better understand the present invention, the following examples are further provided to illustrate the present invention, but the present invention is not limited to the following examples.
In the following examples, the ultra-fine special cement used is one of quick-hardening sulphoaluminate cement and aluminate cement, and is ground by a stirring mill until the specific surface area is 550-650m 2 Per kg; the mineral admixture has a specific surface area of not less than 650m 2 Per kg of lithium slag powder; the superfine tailing sand is superfine tailing sand which is prepared by mixing copper tailings and iron tailings according to any proportion, crushing and screening, wherein the maximum grain diameter is not more than 1.18mm, and the fineness modulus is not more than 1.5; the water reducing agent is formed by mixing a polycarboxylic acid high-efficiency water reducing agent and a melamine high-efficiency water reducing agent according to any proportion; the rheological additive is one of polyacrylamide and xanthan gum or is formed by mixing the polyacrylamide and the xanthan gum according to any proportion; the reinforcing agent is one of lithium carbonate and lithium hydroxide or is formed by mixing the lithium carbonate and the lithium hydroxide according to any proportion; the anti-seepage agent is organosilane; the rust inhibitor is one of sodium nitrite and calcium nitrite or is formed by mixing the sodium nitrite and the calcium nitrite according to any proportion.
Example 1
A functional early strength cement-based grouting material is prepared by the following steps:
1) Weighing the raw materials according to the proportion, wherein the raw materials and the dosage thereof comprise:
2) And putting the weighed mineral admixture, the water reducing agent, the rheological aid, the reinforcing agent, the anti-seepage agent and the rust inhibitor into a stirrer, uniformly mixing, putting the superfine special cement into the stirrer, continuously stirring and uniformly mixing, putting the superfine tailing sand into the stirrer, continuously stirring and uniformly mixing, and thus obtaining the functional early-strength cement-based grouting material.
When in use, water with the weight of 0.28 time of that of the grouting material is added into the prepared functional early strength cement-based grouting material, and the mixture is stirred to form uniform slurry, so that grouting construction can be carried out
Example 2
A functional early strength cement-based grouting material is prepared by the following steps:
1) Weighing the raw materials according to the proportion, wherein the raw materials and the dosage thereof comprise:
2) And putting the weighed mineral admixture, the water reducing agent, the rheological aid, the reinforcing agent, the anti-seepage agent and the rust inhibitor into a stirrer, uniformly mixing, putting the superfine special cement into the stirrer, continuously stirring and uniformly mixing, putting the superfine tailing sand into the stirrer, continuously stirring and uniformly mixing, and thus obtaining the functional early-strength cement-based grouting material.
When in use, water with the weight of 0.275 times of the weight of the grouting material is added into the prepared functional early strength cement-based grouting material, and the mixture is stirred to form uniform slurry, so that the grouting construction can be carried out
Example 3
A functional early strength cement-based grouting material is prepared by the following steps:
1) Weighing the raw materials according to the proportion, wherein the raw materials and the dosage thereof comprise:
2) And putting the weighed mineral admixture, the water reducing agent, the rheological aid, the reinforcing agent, the anti-seepage agent and the rust inhibitor into a stirrer, uniformly mixing, putting the superfine special cement into the stirrer, continuously stirring and uniformly mixing, putting the superfine tailing sand into the stirrer, continuously stirring and uniformly mixing, and thus obtaining the functional early-strength cement-based grouting material.
When in use, water with the weight 0.27 time that of the grouting material is added into the prepared functional early strength cement-based grouting material, and the mixture is stirred to form uniform slurry, thus grouting construction can be carried out
Example 4
A functional early strength cement-based grouting material is prepared by the following steps:
1) Weighing the raw materials according to the proportion, wherein the raw materials and the dosage thereof comprise:
2) And putting the weighed mineral admixture, the water reducing agent, the rheological aid, the reinforcing agent, the anti-seepage agent and the rust inhibitor into a stirrer, uniformly mixing, putting the superfine special cement into the stirrer, continuously stirring and uniformly mixing, putting the superfine tailing sand into the stirrer, continuously stirring and uniformly mixing, and thus obtaining the functional early-strength cement-based grouting material.
When in use, water with the weight 0.265 time of that of the grouting material is added into the prepared functional early strength cement-based grouting material, and the mixture is stirred to form uniform slurry, so that grouting construction can be carried out
Example 5
A functional early strength cement-based grouting material is prepared by the following steps:
1) Weighing the raw materials according to the proportion, wherein the raw materials and the dosage thereof comprise:
2) And putting the weighed mineral admixture, the water reducing agent, the rheological aid, the reinforcing agent, the anti-seepage agent and the rust inhibitor into a stirrer, uniformly mixing, putting the superfine special cement into the stirrer, continuously stirring and uniformly mixing, putting the superfine tailing sand into the stirrer, continuously stirring and uniformly mixing, and thus obtaining the functional early-strength cement-based grouting material.
When in use, water with the weight 0.26 time of that of the grouting material is added into the prepared functional early strength cement-based grouting material and stirred to form uniform slurry, and then grouting construction can be carried out
The functional early strength cement-based grouting materials obtained in examples 1 to 5 were subjected to the performance tests of fluidity, expansion ratio, mechanical strength, durability, and the like, and the results are shown in table 1.
TABLE 1 Performance test results for functional early Strength Cement-based grouting materials obtained in examples 1-5 of examples
The above results show that: the performances of the functional early strength cement-based grouting material obtained by the embodiment, such as fluidity, slurry stability, strength, expansion rate and the like, are all superior to the standard requirements of the grouting material.
It is apparent that the above embodiments are only examples for clearly illustrating, and are not limiting to the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.
Claims (10)
1. A functional early strength cement-based grouting material comprises the following components in parts by weight: 70-85 parts of superfine special cement, 10-25 parts of mineral admixture, 90-105 parts of extra-fine tailing sand, 0.8-1.5 parts of water reducing agent, 0.3-0.6 part of rheological additive, 1.0-1.6 parts of reinforcing agent, 0.1-0.6 part of anti-seepage agent and 0.2-0.7 part of rust inhibitor.
2. The functional early strength cement-based grouting material according to claim 1, wherein the ultra-fine special cement is one of rapid hardening sulphoaluminate cement and aluminate cement, and is ground by a stirring mill to a specific surface area of 550-650m2/kg.
3. The functional early strength cement-based slip casting compound according to claim 1, wherein the mineral admixture is lithium slag powder having a specific surface area of not less than 650m2/kg.
4. The functional early strength cement-based grouting material as claimed in claim 1, wherein the extra-fine tailings are extra-fine tailings with a maximum particle size of not more than 1.18mm and a fineness modulus of not more than 1.5, which are obtained by mixing copper tailings and iron tailings in any proportion and performing crushing and screening processes.
5. The functional early strength cement-based slip casting compound of claim 1, wherein the water reducer is one of a polycarboxylic acid high-efficiency water reducer and a melamine high-efficiency water reducer.
6. The functional early strength cement-based grouting material as claimed in claim 1, wherein the rheological aid is one of polyacrylamide and xanthan gum or is mixed in any proportion.
7. The functional early strength cement-based grouting material as claimed in claim 1, wherein the reinforcing agent is one of lithium carbonate and lithium hydroxide or is mixed in any proportion.
8. The functional early strength cement-based slip casting compound of claim 1, wherein the barrier agent is an organosilane.
9. The functional early strength cement-based grouting material as claimed in claim 1, wherein the rust inhibitor is one of sodium nitrite and calcium nitrite or is mixed in any proportion.
10. A method for preparing the functional early strength cement-based grouting material as defined in any one of claims 1 to 9, comprising the steps of:
1) Weighing the raw materials according to the proportion, wherein the components in parts by weight comprise: 70-85 parts of superfine special cement, 10-25 parts of mineral admixture, 90-105 parts of extra-fine tailing sand, 0.8-1.5 parts of water reducing agent, 0.3-0.6 part of rheological additive, 1.0-1.6 parts of reinforcing agent, 0.1-0.6 part of anti-seepage agent and 0.2-0.7 part of rust inhibitor;
2) And putting the weighed mineral admixture, the water reducing agent, the rheological additive, the reinforcing agent, the anti-seepage agent and the rust inhibitor into a stirrer to be uniformly mixed, then putting the superfine special cement into the stirrer to be continuously stirred and uniformly mixed, and then putting the superfine tailing sand into the stirrer to be continuously stirred and uniformly mixed to obtain the functional early-strength cement-based grouting material.
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