CN111116132A - Grouting material for combined structure and assembly type building node and preparation method thereof - Google Patents
Grouting material for combined structure and assembly type building node and preparation method thereof Download PDFInfo
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- CN111116132A CN111116132A CN201911355934.6A CN201911355934A CN111116132A CN 111116132 A CN111116132 A CN 111116132A CN 201911355934 A CN201911355934 A CN 201911355934A CN 111116132 A CN111116132 A CN 111116132A
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- 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
- C04B28/04—Portland cements
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- 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
- C04B2111/2038—Resistance against physical degradation
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- 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
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
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- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- 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)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a grouting material for pouring a combined structure and an assembly type building node, which comprises the following components in percentage by mass: 30-40% of cement, 10-20% of early strength mineral admixture, 25-45% of quartz sand, 5-15% of superfine mineral admixture, 0.5-5% of composite additive and 5-10% of fiber, wherein the superfine mineral admixture is two or three of micro-beads, micro-silica powder and nano-silica; the composite additive is an expanding agent, a retarder, a defoaming agent, a reinforcing agent and a water reducing agent; the fiber is a mixture of steel fiber and organic fiber. Also discloses a preparation method of the grouting material, which comprises the following steps: the components of the grouting material are mixed into dry mixture and packaged, and the preparation method is simple. The grouting material has the advantages of micro-expansion, high filling property, ultrahigh strength, high ductility and high vibration resistance.
Description
Technical Field
The invention relates to the field of civil engineering materials, in particular to grouting material for pouring a combined structure and an assembly type building node and a preparation method thereof, and is suitable for combined structures, assembly type building nodes and super high-rise buildings.
Background
Along with the rapid development of social and economic levels, people have higher and higher requirements on building structures, and modern building structures require large space utilization rate, high construction efficiency and stable and reliable performance. Therefore, new building structures and construction methods have been continuously developed. In modern building structures, composite structures (including steel-concrete composite structures, steel pipe concrete) and fabricated concrete structures are increasingly used. In the construction process of the combined structure, the strength of concrete is required to reach more than 100MPa, but in the actual commercial concrete market, 100MPa concrete is difficult to supply, the ultra-high-strength concrete cannot realize all-regional supply, and the volume stability and filling performance of the concrete cannot meet the engineering requirements. For the fabricated structure, the fabricated node is in a complex stress state, so that the fabricated node has higher requirements on strength and ductility, but the ductility and the fidelity performance of common high-strength concrete cannot meet the requirements of the fabricated node. Compared with high-strength concrete, the grouting material can realize the characteristics of ultrahigh strength, high ductility, commercial supply, micro-expansion, high filling, high early strength, stable long-term performance and the like. Therefore, the market demand of ultrahigh-strength and high-ductility grouting materials is increasing.
The strength of the existing grouting material is mostly below 100MPa, and a patent CN1039788A discloses a manufacturing method of an ultrahigh-strength cement material, wherein the compressive strength of the material can reach, but the material does not have fluidity, and the material needs a special hot-pressing manufacturing process and does not have the condition of field application. Patent CN109650806A discloses a grouting material with strength of 121MPa in 28 days under normal temperature curing conditions, but the components of the grouting material are not doped with fibers, so that the high ductility of the grouting material cannot be ensured. Patent CN101921086A discloses a cement-based ultrahigh-strength shrinkage-free grouting material with strength of 120MPa or more in 28 days under normal-temperature curing conditions, but it does not disclose water consumption and ductility of the grouting material, and its highest strength in 28 days is 131 MPa. For cement-based materials above 100MPa, the ductility is difficult to improve or multipoint cracking is difficult to realize by only doping steel fibers or not doping fibers, and a fiber doping scheme needs to be optimized through a large number of tests and theoretical calculation aiming at different strength grades.
In summary, because the existing grouting material has limited performance, it is difficult to meet the requirements of modern building structures, and ultrahigh strength and high ductility grouting materials with more excellent performance need to be developed.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a grouting material for casting a composite structure and an assembly type building node, which is cured at normal temperature, can be commercially supplied, has micro-expansion, high filling property, ultra-high strength (100 to 135MPa), high ductility (ultimate tensile strain is not less than 2%), high vibration resistance, high early strength, and stable long-term performance, and can reduce the cross-sectional size of a member while improving the construction efficiency, save space, and is more suitable for an ultra-high structure.
The invention also aims to provide a preparation method of the grouting material for pouring the combined structure and the fabricated building node.
The above purpose is realized by the following technical scheme:
according to one aspect of the invention, the invention provides a grouting material for pouring of a composite structure and an assembled building node, which comprises the following components in percentage by mass:
wherein the superfine mineral admixture is two or three of micro-beads, micro-silicon powder and nano-silicon dioxide; the composite additive is an expanding agent, a retarder, a defoaming agent, a reinforcing agent and a water reducing agent; the fiber is a mixture of steel fiber and organic fiber.
In the invention, the cement is P.O 52.5 ordinary portland cement.
In the invention, the early strength mineral admixture is an anhydrous calcium sulphoaluminate mineral admixture, preferably, the early strength mineral admixture is an ultrafine anhydrous calcium sulphoaluminate mineral admixture, and further preferably, the fineness is more than 500m2/kg。
In the invention, in the quartz sand, the quartz sand with the particle size of 50-100 meshes accounts for 30-60% of the total mass of the quartz sand, and the quartz sand with the particle size of 100-200 meshes accounts for 40-70% of the total mass of the quartz sand.
In the invention, in the superfine mineral admixture, the microbeads account for 20-60 percent of the total mass of the superfine mineral admixture; the micro silicon powder accounts for 30 to 50 percent of the total weight of the superfine mineral admixture; the nano silicon dioxide accounts for 0-50% of the total superfine mineral admixture mass.
In the composite admixture, the expanding agent accounts for 60-80% of the total mass of the composite admixture; the retarder accounts for 0.1-1% of the total composite admixture by mass; the defoaming agent accounts for 0.1-1% of the total composite additive by mass; the reinforcing agent accounts for 0.1-5% of the total composite additive by mass; the water reducing agent accounts for 15-30% of the total composite additive by mass.
In the composite additive, the expanding agent is an ettringite expanding agent, the retarder is citric acid, the defoaming agent is an organic silicon defoaming agent or a polyether defoaming agent, the reinforcing agent is calcium carbonate nanowhiskers, and the water reducing agent is a polycarboxylic acid water reducing agent.
In the invention, the diameter of the steel fiber is 0.05 mm-0.12 mm, the length is 5 mm-12 mm, and the steel fiber accounts for 80-95% of the total fiber mass; the organic fiber is one or more of polyethylene, polyvinyl alcohol and polypropylene fiber, the length of the organic fiber is 5-12 mm, and the organic fiber accounts for 5-20% of the total fiber mass.
In a preferred embodiment of the invention, the grouting material for pouring the composite structure and the fabricated building node comprises the following components in percentage by mass:
wherein the superfine mineral admixture is two or three of micro-beads, micro-silicon powder and nano-silicon dioxide; the composite additive is an expanding agent, a retarder, a defoaming agent, a reinforcing agent and a water reducing agent; the fiber is a mixture of steel fiber and organic fiber.
In the invention, when all the components of the grouting material are mixed, the mass of the added mixing water is 6-12% of the total mass of the grouting material.
According to another aspect of the present invention, there is provided a method for preparing a grouting material for casting a composite structure and a fabricated building node, comprising: mixing the components of the grouting material into dry mixture, packaging and packaging.
In the present invention, the method further comprises:
when the grouting material is used, mixing water accounting for 6-12% of the mass of the grouting material is added into the grouting material, and the mixture is stirred for 3-5 min and is uniformly stirred.
The invention has the beneficial effects that:
(1) the 28d strength reaches 100-135 MPa under the normal-temperature curing condition through component selection and matching and reasonable optimization on a microscopic level;
(2) the test reveals the mesomechanics mechanism of the cement-based composite material with high strength and ultrahigh ductility, optimizes the tensile component and the mixing amount thereof, and realizes that the ultimate tensile strain of the ultrahigh-strength cement-based composite material is not lower than 2 percent;
(3) realizing the all-regionalized commercialized supply of the ultrahigh-strength cement-based material;
(4) the material has micro-expansion, high filling property, high vibration resistance, high early strength and stable long-term performance;
(5) it is especially suitable for combined structure and assembled building node.
Detailed Description
The invention will be further illustrated by the following examples, which are intended to be purely exemplary of the invention and are not to be construed as being limited thereto, the listed materials being in accordance with the requirements set forth for the materials indicated above.
Example 1
The grouting material for pouring the composite structure and the fabricated building node comprises 30% of cement, 11% of early strength mineral admixture, 39.8% of quartz sand, 5.5% of microspheres, 4.5% of micro silicon powder, 2.5% of expanding agent, 0.02% of retarder, 0.02% of defoaming agent, 0.1% of reinforcing agent, 0.53% of water reducing agent, 5.37% of steel fiber and 0.66% of polyvinyl alcohol fiber. Adding mixing water accounting for 11.5 percent of the total mass of the cementing material, and uniformly stirring to construct and form, wherein the cement is P.O 52.5 ordinary Portland cement, and the early-strength mineral admixture has the fineness of more than 500m2The superfine anhydrous calcium sulphoaluminate mineral admixture is characterized in that the superfine anhydrous calcium sulphoaluminate mineral admixture is prepared from 40% of quartz sand with the particle size of 50-100 meshes and 60% of quartz sand with the particle size of 100-200 meshes, the expanding agent is an ettringite expanding agent, the retarder is citric acid, the defoaming agent is an organic silicon defoaming agent, the reinforcing agent is calcium carbonate nanowhiskers, the water reducing agent is a polycarboxylic acid water reducing agent, the diameter of the steel fiber is 0.05-0.12 mm, the length of the steel fiber is 5-12 mm, and the length of the polyvinyl alcohol fiber is 5-12 mm.
Example 2
The grouting material for pouring the composite structure and the fabricated building node comprises 33% of cement, 13% of early strength mineral admixture, 34% of quartz sand, 4% of microspheres, 3% of silica fume, 3% of nano-silica, 2.65% of expanding agent, 0.03% of retarder, 0.02% of defoaming agent, 0.15% of reinforcing agent, 0.65% of water reducing agent, 5.8% of steel fiber and 0.7% of polyvinyl alcohol fiber. Adding mixing water accounting for 10% of the total mass of the cementing material, and uniformly stirring to construct and form, wherein the cement is P.O 52.5 common silicate waterMud, the fineness of the early strength mineral admixture is more than 500m2The superfine anhydrous calcium sulphoaluminate mineral admixture is characterized in that the superfine anhydrous calcium sulphoaluminate mineral admixture is prepared from 50% of quartz sand with the particle size of 50-100 meshes and 50% of quartz sand with the particle size of 100-200 meshes, the expanding agent is an ettringite expanding agent, the retarder is citric acid, the defoaming agent is a polyether defoaming agent, the reinforcing agent is calcium carbonate nanowhiskers, the water reducing agent is a polycarboxylic acid water reducing agent, the diameter of the steel fiber is 0.05-0.12 mm, the length of the steel fiber is 5-12 mm, and the length of the polyvinyl alcohol fiber is 5-12 mm.
Example 3
The grouting material for pouring the composite structure and the fabricated building node comprises 38% of cement, 14% of early strength mineral admixture, 28% of quartz sand, 2% of microspheres, 3% of silica fume, 4.65% of nano-silica, 2.7% of expanding agent, 0.03% of retarder, 0.02% of defoaming agent, 0.2% of reinforcing agent, 0.85% of water reducing agent, 5.85% of steel fiber and 0.7% of polyvinyl alcohol fiber. Adding mixing water accounting for 8% of the total mass of the cementing material, and uniformly stirring to construct and form, wherein the cement is P.O 52.5 ordinary Portland cement, and the early-strength mineral admixture is a mineral admixture with the fineness of more than 500m2The superfine anhydrous calcium sulphoaluminate mineral admixture is characterized in that the superfine anhydrous calcium sulphoaluminate mineral admixture is prepared from 60% of quartz sand with the particle size of 50-100 meshes and 40% of quartz sand with the particle size of 100-200 meshes, the expanding agent is an ettringite expanding agent, the retarder is citric acid, the defoaming agent is an organic silicon defoaming agent, the reinforcing agent is calcium carbonate nanowhiskers, the water reducing agent is a polycarboxylic acid water reducing agent, the diameter of the steel fiber is 0.05-0.12 mm, the length of the steel fiber is 5-12 mm, and the length of the polyvinyl alcohol fiber is 5-12 mm.
Reference example 1
The grouting material for pouring the composite structure and the fabricated building node comprises 38% of cement, 14% of early strength mineral admixture, 28% of quartz sand, 2% of microspheres, 3% of silica fume, 4.65% of nano-silica, 2.7% of expanding agent, 0.03% of retarder, 0.02% of defoaming agent, 0.2% of reinforcing agent, 0.85% of water reducing agent and 6.55% of steel fiber. And adding mixing water accounting for 8% of the total mass of the cementing material, and uniformly stirring to construct and mold.
Reference example 2
The grouting material for pouring the composite structure and the fabricated building node comprises 38% of cement, 14% of early strength mineral admixture, 28% of quartz sand, 2% of microspheres, 3% of silica fume, 4.65% of nano-silica, 2.7% of expanding agent, 0.03% of retarder, 0.02% of defoaming agent, 0.2% of reinforcing agent, 0.85% of water reducing agent and 6.55% of polyvinyl alcohol fiber. And adding mixing water accounting for 8% of the total mass of the cementing material, and uniformly stirring to construct and mold.
The grouting materials of the above embodiments are tested according to the technical Specification for application of Cement-based grouting materials (GB/T50488-once 2008), and the index performances of all the embodiments are shown in the following Table 1,
TABLE 1
As can be seen from the above Table 1, the ductility of the grouting material of the reference example 1 only containing steel fibers and the ductility of the grouting material of the reference example 2 only containing polyvinyl alcohol fibers both do not reach 2%, and the components and the proportion of the grouting material are optimized so that the ultimate tensile strain of the grouting material is not lower than 2%.
As described above, although the embodiments of the present invention have been described in detail, it will be apparent to those skilled in the art that many modifications are possible without substantially departing from the spirit and scope of the present invention. Therefore, such modifications are also included in the scope of the present invention.
Claims (10)
1. A grouting material for pouring of composite structures and fabricated building nodes is characterized by comprising the following components in percentage by mass:
wherein the superfine mineral admixture is two or three of micro-beads, micro-silicon powder and nano-silicon dioxide; the composite additive is an expanding agent, a retarder, a defoaming agent, a reinforcing agent and a water reducing agent; the fiber is a mixture of steel fiber and organic fiber.
2. The grout material of claim 1, wherein the cement is P-O52.5 portland cement.
3. The grout material of claim 1, wherein the early strength mineral admixture is an anhydrous calcium sulfoaluminate mineral admixture.
4. The grouting material according to claim 1, wherein the quartz sand with a particle size of 50-100 meshes accounts for 30-60% of the total mass of the quartz sand, and the quartz sand with a particle size of 100-200 meshes accounts for 40-70% of the total mass of the quartz sand.
5. The grouting material of claim 1, wherein in the ultra-fine mineral admixture, the micro-beads account for 20-60% of the total mass of the ultra-fine mineral admixture; the micro silicon powder accounts for 30 to 50 percent of the total weight of the superfine mineral admixture; the nano silicon dioxide accounts for 0-50% of the total superfine mineral admixture mass.
6. The grouting material of claim 1, wherein in the composite admixture, the expanding agent accounts for 60-80% of the total mass of the composite admixture; the retarder accounts for 0.1-1% of the total composite admixture by mass; the defoaming agent accounts for 0.1-1% of the total composite additive by mass; the reinforcing agent accounts for 0.1-5% of the total composite additive by mass; the water reducing agent accounts for 15-30% of the total composite additive by mass.
7. The grouting material of claim 6, wherein in the composite additive, the expanding agent is an ettringite expanding agent, the retarder is citric acid, the defoaming agent is an organosilicon defoaming agent or a polyether defoaming agent, the reinforcing agent is calcium carbonate nanowhiskers, and the water reducing agent is a polycarboxylic acid water reducing agent.
8. The grouting material of claim 1, wherein the steel fibers have a diameter of 0.05mm to 0.12mm and a length of 5mm to 12mm, and account for 80% to 95% of the total fiber mass; the organic fiber is one or more of polyethylene, polyvinyl alcohol and polypropylene fiber, the length of the organic fiber is 5-12 mm, and the organic fiber accounts for 5-20% of the total fiber mass.
9. A method of preparing a grout material according to any of claims 1 to 8, comprising: mixing the components of the grouting material into dry mixture, packaging and packaging.
10. The method of manufacturing according to claim 9, further comprising:
when the grouting material is used, mixing water accounting for 6-12% of the mass of the grouting material is added into the grouting material, and the mixture is stirred for 3-5 min and is uniformly stirred.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112341066A (en) * | 2020-10-21 | 2021-02-09 | 湖北工业大学 | Sleeve grouting material and preparation method thereof |
| CN112408909A (en) * | 2020-11-20 | 2021-02-26 | 江苏扬建集团有限公司 | High-performance sleeve grouting material for prefabricated building and preparation method thereof |
| CN112608125A (en) * | 2020-12-28 | 2021-04-06 | 南京航空航天大学 | Basic magnesium sulfate cement concrete pouring material for fabricated building nodes and preparation method and application thereof |
| CN113105198A (en) * | 2021-04-16 | 2021-07-13 | 交通运输部公路科学研究所 | Plate bottom grouting material for assembled cement concrete pavement plate |
| CN113200728A (en) * | 2021-06-25 | 2021-08-03 | 洛阳理工学院 | High-strength and high-durability cement-based premix material and preparation method thereof |
| CN113321464A (en) * | 2021-05-08 | 2021-08-31 | 建研建材有限公司 | Anti-corrosion waterproof cement-based grouting material and preparation method thereof |
| CN113603433A (en) * | 2021-08-23 | 2021-11-05 | 沈阳建筑大学 | Shale-doped sleeve grouting material for connecting cement-based steel bars |
| CN114086765A (en) * | 2021-11-05 | 2022-02-25 | 北京中建建筑科学研究院有限公司 | Deep-type funnel grouting sleeve grout supplementing method |
| CN115073041A (en) * | 2021-03-11 | 2022-09-20 | 北京都市绿源环保科技有限公司 | Additive for controllable low-strength backfill material and preparation method thereof |
| CN115925350A (en) * | 2022-06-22 | 2023-04-07 | 中铁七局集团有限公司 | High-strength anti-fatigue load steel-concrete connection grouting material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113321464A (en) * | 2021-05-08 | 2021-08-31 | 建研建材有限公司 | Anti-corrosion waterproof cement-based grouting material and preparation method thereof |
| CN113200728A (en) * | 2021-06-25 | 2021-08-03 | 洛阳理工学院 | High-strength and high-durability cement-based premix material and preparation method thereof |
| CN113603433A (en) * | 2021-08-23 | 2021-11-05 | 沈阳建筑大学 | Shale-doped sleeve grouting material for connecting cement-based steel bars |
| CN114086765A (en) * | 2021-11-05 | 2022-02-25 | 北京中建建筑科学研究院有限公司 | Deep-type funnel grouting sleeve grout supplementing method |
| CN115925350A (en) * | 2022-06-22 | 2023-04-07 | 中铁七局集团有限公司 | High-strength anti-fatigue load steel-concrete connection grouting material and preparation method thereof |
| CN115925350B (en) * | 2022-06-22 | 2024-02-13 | 中铁七局集团有限公司 | High-strength anti-fatigue load steel-concrete connection grouting material and preparation method thereof |
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