CN113929422A - High-performance building support grouting material and preparation method thereof - Google Patents
High-performance building support grouting material and preparation method thereof Download PDFInfo
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- CN113929422A CN113929422A CN202111423026.3A CN202111423026A CN113929422A CN 113929422 A CN113929422 A CN 113929422A CN 202111423026 A CN202111423026 A CN 202111423026A CN 113929422 A CN113929422 A CN 113929422A
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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
- C04B28/14—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 calcium sulfate cements
- C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/143—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being phosphogypsum
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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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/42—Glass
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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
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/06—Macromolecular compounds fibrous
- C04B16/0616—Macromolecular compounds fibrous from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B16/065—Polyacrylates; Polymethacrylates
- C04B16/0658—Polyacrylonitrile
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/146—Silica fume
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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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/0013—Boron compounds
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/04—Carboxylic acids; Salts, anhydrides or esters thereof
- C04B24/06—Carboxylic acids; Salts, anhydrides or esters thereof containing hydroxy groups
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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
- C04B7/00—Hydraulic cements
- C04B7/02—Portland cement
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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
- C04B7/00—Hydraulic cements
- C04B7/32—Aluminous 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
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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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
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- 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
Abstract
The invention discloses a high-performance building support grouting material, which comprises 15-25 parts of Portland cement and 15-25 parts of sulphoaluminate cement; 1-5 parts of silica fume, 3-6 parts of mineral powder and 2-5 parts of fly ash; 50-70 parts of machine-made sand, 1-3 parts of phosphogypsum and 0.3-0.5 part of fiber; 1-5 parts of expanding agent and 0.3-0.5 part of water reducing agent; 0.01 to 0.15 portion of defoaming agent and 0.3 to 0.5 portion of retarder. The grouting material can meet the construction requirements of the grouting material for the basin-type rubber support of the precast box girder, and has good anti-permeability and wear-resistant capabilities.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a high-performance building support grouting material and a preparation method thereof.
Background
In recent years, the rapid development of high-speed railways in China takes cast-in-place piles, bearing platforms and pier columns as offline structures, and the construction method for erecting prefabricated box girders becomes a main construction method of high-speed railway foundations. In order to improve the hoisting speed of the bridge and shorten the hoisting time of the bridge, the requirements that the fluidity is more than 260mm at normal temperature for 30min, the compressive strength reaches 20MPa for 2h and the flexural strength is more than 10MPa for 24h are provided for the precast box girder basin-type rubber support grouting material; this ensures that the holder has sufficient strength at an early stage and good operability.
According to market research and actual tests, the existing support grouting materials have the contradiction between early strength and operability, either the early strength meets the requirement, but the setting time is too fast, so that the operability is poor, or the good operability is achieved, but the early strength does not meet the requirement.
For example, CN201910706702.4 discloses a grouting material, application and construction method thereof, wherein the grouting material comprises:
30-40 parts of rapid hardening sulphoaluminate cement with the strength grade of 42.5 or 52.5;
5-8 parts of ordinary portland cement with the strength grade of 42.5 or 52.5;
3-7 parts of a hardening agent; 5-8 parts of anhydrite;
30-50 parts of quartz sand and 0.5-1 part of water reducing agent;
2-4 parts of rubber powder; 0.1-0.5 part of cellulose ether;
0.1-0.5 part of retarder, wherein the retarder is one of boric acid, citric acid or tartaric acid;
1-2.5 parts of fibers and PP fibers with the length of 3-5 cm;
1-3 parts of an antifreezing agent; water with the water-material ratio of 0.25-0.33;
when the grouting material is mixed by water with the temperature of-8 ℃ in a negative temperature environment with the temperature of-8 ℃, the grouting material has the following characteristics:
the initial fluidity is more than or equal to 260mm, the fluidity is more than or equal to 240mm in 30min, the compressive strength is more than or equal to 15MPa in 2h, the compressive strength is more than or equal to 60MPa in 28d, and the bonding strength with the base layer concrete is more than or equal to 2.0 MPa.
It can be seen from the above patent that the performance of the material can not reach the requirements that the fluidity is more than 260mm at the normal temperature for 30min and the compressive strength reaches 20MPa within 2 h.
In order to solve the problems, the prior art can add an early strength agent and add more retarder components, however, although the early strength agent can obviously improve the early strength after being added, most of the early strength agent can damage the 28d strength after final setting, and the later strength can be reduced to a certain extent. Meanwhile, the retarding time has certain influence on the early strength, and boric acid, citric acid and tartaric acid are common retarder components in the prior art, mainly play a role in retarding in concrete or mortar, and have no influence on the early strength.
Mortar is an important building base material, cement mortar in the prior art is formed by mixing cement, sand, admixture, water and the like, and the mortar is often coated on the outer layer of a building, such as the surface of a base layer of a wall surface, a ground surface, a column and the like, during construction; the building outer layer has strict requirements on water resistance, and the water resistance and impermeability of the mortar in the prior art still need to be improved.
For example, CN201910789798.5 discloses a waterproof impervious cement mortar and a preparation method thereof, which comprises the following components in parts by weight:
50-60 parts of ordinary portland cement, 30-45 parts of water and 15-20 parts of construction waste powder;
15-20 parts of carbide slag and 5-10 parts of polyquaternary ammonium salt 10 modified nanometer vanadium stone powder;
0.5-1.5 parts of sucrose fatty acid ester; 0.3-1 part of 2,3,4, 6-tetrafluorobenzyl 2-morpholine ethanesulfonate;
3-8 parts of span 80/methacrylamide/beta- (acryloyloxy) propionic acid/4, 4 '-diaminostilbene-2, 2' -disulfonic acid copolymer.
The mortar in the patent is tested according to the test method of JGJ/T70-2009, and the seepage resistance pressure of the mortar reaches 1.4-1.5 MPa. The impermeability of the patent is improved to a certain extent compared with the prior art, but polyquaternium 10 modified nanometer vanadium stone powder, 2,3,4, 6-tetrafluorobenzyl 2-morpholine ethanesulfonate, span 80/methacrylamide/beta- (acryloyloxy) propionic acid/4, 4 '-diaminostilbene-2, 2' -disulfonic acid copolymer are required to be added into the cement mortar; the three substances are required to be prepared separately according to corresponding methods, the cost for obtaining the product is high, and the cost for implementing the invention is greatly increased.
Disclosure of Invention
The invention aims to provide a high-performance building support grouting material, which can solve the following technical problems:
the grouting material in the prior art can not meet the requirements that the fluidity of the grouting material for the basin-type rubber bearing of the prefabricated box girder is more than 260mm at normal temperature for 30min, the compressive strength for 2h reaches 20MPa, and the flexural strength for 24h is more than 10 MPa.
In order to achieve the purpose, the invention provides a high-performance building support grouting material which comprises the following components in parts by weight:
15 to 25 portions of Portland cement and 15 to 25 portions of sulphoaluminate cement;
the Portland cement is one of P.I 52.5R and P.II 52.5 cement;
the sulphoaluminate cement has the strength grade of 72.5 and is quick-hardening early-strength sulphoaluminate cement;
1-5 parts of silica fume, 3-6 parts of mineral powder and 2-5 parts of fly ash;
50-70 parts of machine-made sand, 1-3 parts of phosphogypsum and 0.3-0.5 part of fiber;
1-5 parts of expanding agent and 0.3-0.5 part of water reducing agent;
0.01 to 0.15 portion of defoaming agent and 0.3 to 0.5 portion of retarder.
The invention preferably discloses a high-performance building support grouting material which comprises the following components in parts by weight:
20 parts of Portland cement and 22 parts of sulphoaluminate cement;
3 parts of silica fume, 4 parts of mineral powder and 4 parts of fly ash;
60 parts of machine-made sand, 2 parts of phosphogypsum and 0.3 part of fiber;
2 parts of an expanding agent and 0.4 part of a water reducing agent;
0.05 part of defoaming agent and 0.3 part of retarder.
The preferred silica fume of the invention has an average particle size of 0.1 μm and a specific surface area of more than 18700m2/kg；
The mineral powder is S105-grade superfine mineral powder with specific surface area greater than 3000m2/kg；
The fly ash is I-grade fly ash, and the specific surface area is more than 400m2/kg。
Preferably, the machine-made sand is prepared from the following components in parts by weight of 0.08-0.3 mm: the machine-made sand with three grades of 0.3-0.6 mm and 0.6-1.28 mm is prepared according to the following steps of: 2-4: 1-3; the phosphogypsum is undisturbed phosphogypsum with the grain diameter smaller than 0.3 mm.
Preferably, the swelling agent is one of MgO swelling agent, HCSA swelling agent and CSA swelling agent;
the water reducing agent is a polycarboxylic acid type water reducing agent;
the defoaming agent is polydimethylsiloxane defoaming agent.
Preferably, the retarder is a mixture of boric acid, citric acid and tartaric acid, and the mixing proportion is 1-2 parts of boric acid, 1 part of citric acid and 4.5-5 parts of tartaric acid. Boric acid, citric acid and tartaric acid were all analytically pure.
Based on the grouting material components, the invention discloses a method for preparing high-performance building support grouting material, which comprises the following steps:
(1) weighing various raw materials according to the weight proportion; adding the weighed Portland cement, sulphoaluminate cement, silica fume, mineral powder, fly ash, machine-made sand, phosphogypsum and expanding agent into a mixer for mixing;
(2) uniformly mixing the fiber, the water reducing agent, the defoaming agent and the retarder;
(3) and (3) adding the mixture obtained in the step (2) into the mixer obtained in the step (1) and uniformly mixing to prepare the high-performance building support grouting material.
The invention solves the technical problems that: the invention solves the problems by optimizing the addition type of the fiber under the condition of not changing main ingredients and adding auxiliary ingredients as little as possible, reducing the cost and improving the impermeability and the wear resistance of the mortar.
The invention selects modified polyacrylonitrile fiber, and the modification method of the modified polyacrylonitrile fiber comprises the following steps:
(1) dissolving 100 parts of polyacrylonitrile, 5-10 parts of polyamide, 2-4 parts of sodium carboxymethylcellulose and 2-5 parts of sodium metaaluminate in dimethylformamide;
(2) after dissolution, the temperature is raised to 40-55 ℃, and the temperature is kept for 1-2 h;
(3) continuously heating to 60-75 ℃, keeping the temperature for 2-3 h, adding dimethylformamide to a constant volume to obtain a spinning solution, wherein the concentration of the spinning solution is 25-30%;
(4) filtering to remove coagulum and bubbles, sending into a spinning machine for wet spinning, and performing spinning and solidification to obtain the modified polyacrylonitrile fiber.
In summary, the invention has the following advantages:
1. according to the invention, the early strength and operability of the support grouting material are compatible by adjusting the special proportion of boric acid, citric acid and tartaric acid and adjusting the characteristic proportion of mineral powder, fly ash and silica fume, so that the prepared grouting material can have the fluidity of more than 260mm at normal temperature for 30min, the compressive strength of 20MPa for 2h and the flexural strength of more than 10MPa for 24 h; the basic requirements of the precast box girder basin-type rubber support grouting material are met.
The invention has the advantages of early strength and operability, and can ensure the early strength, accelerate the construction progress and ensure the long operable time.
2. The invention adopts the compounding of the sulphoaluminate cement and the Portland cement, not only realizes the characteristic of early strength, but also ensures the continuous increase of later strength, and avoids the problem of later strength shrinkage caused by the independent use of the sulphoaluminate cement.
3. The gypsum used in the invention is the original phosphogypsum with the grain diameter smaller than 0.03mm, the phosphogypsum has the retarding effect of substances such as phosphorus, fluorine and the like, and the grain diameter smaller than 0.03mm ensures that the phosphogypsum has less impurities such as organic matters and the like. The phosphogypsum is dihydrate gypsum, the solubility of the phosphogypsum in water is low, the setting time of the support grouting material is delayed to a certain extent, the operable time is prolonged, and in addition, the production cost is saved by using machine-made sand to replace quartz sand.
4. The grouting material has the advantages of simple preparation method, wide and easily-obtained raw material sources and low production cost.
5. The invention modifies the fiber material, and the prepared grouting material has good waterproof and anti-permeability performance and wear resistance, relatively low building cost and good market value.
Detailed Description
The invention discloses a high-performance building support grouting material which comprises the following components in parts by weight:
20 parts of Portland cement and 22 parts of sulphoaluminate cement;
3 parts of silica fume, 4 parts of mineral powder and 4 parts of fly ash;
60 parts of machine-made sand, 2 parts of phosphogypsum and 0.3 part of fiber;
2 parts of an expanding agent and 0.4 part of a water reducing agent;
0.05 part of defoaming agent and 0.3 part of retarder.
The raw materials of the invention can use the following types or parameters:
the Portland cement is one of P.I 52.5R and P.II 52.5 cement;
the sulphoaluminate cement has the strength grade of 72.5 and is quick-hardening early-strength sulphoaluminate cement;
the silica fume has average particle diameter of 0.1 μm and specific surface area greater than 18700m2/kg；
The mineral powder is S105-grade superfine mineral powder with specific surface area greater than 3000m2/kg；
The fly ash is I-grade fly ash, and the specific surface area is more than 400m2/kg；
The mechanical sand is prepared from the following raw materials in parts by weight of 0.08-0.3 mm: the machine-made sand with three grades of 0.3-0.6 mm and 0.6-1.28 mm is prepared according to the following steps of: 2-4: 1-3; the particle size of the machine-made sand has no significant influence on the technical problem of the invention;
the phosphogypsum is undisturbed phosphogypsum with the grain diameter smaller than 0.3 mm;
the swelling agent is one of MgO swelling agent, HCSA swelling agent and CSA swelling agent;
the water reducing agent is a polycarboxylic acid type water reducing agent;
the defoaming agent is polydimethylsiloxane defoaming agent.
The retarder is a mixture of boric acid, citric acid and tartaric acid, and the mixing proportion is 1 part of boric acid, 1 part of citric acid and 4.5 parts of tartaric acid.
The fiber is one of polypropylene fiber, polyvinyl alcohol fiber or modified polyacrylonitrile fiber.
The preparation method of the high-performance building support grouting material comprises the following steps:
(1) weighing various raw materials according to the weight proportion; adding the weighed Portland cement, sulphoaluminate cement, silica fume, mineral powder, fly ash, machine-made sand, phosphogypsum and expanding agent into a mixer for mixing;
(2) uniformly mixing the fiber, the water reducing agent, the defoaming agent and the retarder;
(3) and (3) adding the mixture obtained in the step (2) into the mixer obtained in the step (1) and uniformly mixing to prepare the high-performance building support grouting material.
Example one, Effect of different grout composition on early and operability
Example 1
A high-performance building support grouting material comprises the following components in parts by weight:
and (3) machining sand: 50 parts of Portland cement: 15 parts of sulphoaluminate cement: 20 parts, phosphogypsum: 2 parts of silica fume: 2 parts of mineral powder: 3 parts of fly ash: 2 parts of an expanding agent: 1 part of water reducing agent: 0.3 part, defoaming agent: 0.01 part, fiber: 0.3 part and 0.5 part of retarder.
The mechanical sand is prepared from the following raw materials in parts by weight of 0.08-0.3 mm: the machine-made sand with three grades of 0.3-0.6 mm and 0.6-1.28 mm is prepared according to the following steps of: 3: 1 in a certain proportion. The Portland cement is P.I. 52.5R cement. The expanding agent is one of CSA expanding agents, the retarder is tartaric acid, and the fiber is polyvinyl alcohol fiber.
Example 2
A high-performance building support grouting material comprises the following components in parts by weight:
and (3) machining sand: 50 parts of Portland cement: 15 parts of sulphoaluminate cement: 20 parts, phosphogypsum: 2 parts of silica fume: 2 parts of mineral powder: 3 parts of fly ash: 2 parts of an expanding agent: 1 part of water reducing agent: 0.3 part, defoaming agent: 0.01 part, fiber: 0.3 portion of retarder and 0.3 portion of retarder.
The mechanical sand is prepared from the following raw materials in parts by weight of 0.08-0.3 mm: the machine-made sand with three grades of 0.3-0.6 mm and 0.6-1.28 mm is prepared according to the following steps of: 3: 1 in a certain proportion. The Portland cement is P.I. 52.5R cement. The expanding agent is one of CSA expanding agents, the retarder is boric acid, and the fiber is polyvinyl alcohol fiber.
Example 3
A high-performance building support grouting material comprises the following components in parts by weight:
and (3) machining sand: 54 parts of Portland cement: 20 parts, sulphoaluminate cement: 15 parts, phosphogypsum: 1 part, silica fume: 2 parts of mineral powder: 4 parts of fly ash: 3 parts of an expanding agent: 1 part of water reducing agent: 0.3 part, defoaming agent: 0.15 part, fiber: 0.5 part and 0.5 part of retarder.
The mechanical sand is prepared from the following raw materials in parts by weight of 0.08-0.3 mm: the machine-made sand with three grades of 0.3-0.6 mm and 0.6-1.28 mm is prepared according to the following steps of: 3: 3 in proportion. The Portland cement is P.II 52.5 cement. The swelling agent is HCSA swelling agent. The retarder is boric acid, and the citric acid and the tartaric acid are mixed according to the weight ratio of 1: 1: 5 in proportion; the fiber is polyvinyl alcohol fiber.
Example 4
A high-performance building support grouting material comprises the following components in parts by weight:
and (3) machining sand: 60 parts of portland cement: 15 parts of sulphoaluminate cement: 15 parts, phosphogypsum: 2 parts of silica fume: 2 parts of mineral powder: 3 parts of fly ash: 2 parts of an expanding agent: 1 part of water reducing agent: 0.5 part, defoaming agent: 0.01 part, fiber: 0.3 part and 0.5 part of retarder.
The mechanical sand is prepared from the following raw materials in parts by weight of 0.08-0.3 mm: the machine-made sand with three grades of 0.3-0.6 mm and 0.6-1.28 mm is prepared according to the following steps of: 2: 2 in proportion. The Portland cement is P.II 52.5 cement. The expanding agent is MgO expanding agent. The retarder is boric acid, and the citric acid and the tartaric acid are mixed according to the weight ratio of 2: 1: 5 in proportion; the fibers are polypropylene fibers.
Example 5
A high-performance building support grouting material comprises the following components in parts by weight:
and (3) machining sand: 50 parts of Portland cement: 17 parts of sulphoaluminate cement: 20 parts, phosphogypsum: 2 parts of silica fume: 3 parts of mineral powder: 3 parts of fly ash: 2 parts of an expanding agent: 3 parts of water reducing agent: 0.5 part, defoaming agent: 0.15 part, fiber: 0.5 part and 0.4 part of retarder.
The mechanical sand is prepared from the following raw materials in parts by weight of 0.08-0.3 mm: the machine-made sand with three grades of 0.3-0.6 mm and 0.6-1.28 mm is prepared according to the following steps of: 3: 1 in a certain proportion. The Portland cement is P.II 52.5 cement. The swelling agent is CSA swelling agent. The retarder is boric acid, and the citric acid and the tartaric acid are mixed according to the weight ratio of 1: 1: 5, the fiber is polypropylene fiber.
Comparative examples 1 and 2 are commercially available pedestal grouting materials.
And (3) detection results:
the performance of the support grouting material is tested according to the relevant regulations of the grouting material for gravity grouting of the basin-type rubber support of the prefabricated simply-supported box girder in the temporary technical condition of the prestressed concrete prefabricated beam of the passenger special line of railway department iron science and technology [2004]120, the flowing performance and the mechanical performance of the support grouting material are detected, and the detection results are shown as follows:
as can be seen from the detection results, the comparative example 1 and the comparative example 2 are both the support grouting materials sold in the market, and the comparative example 1 has good early strength but short operable time; comparative example 2 was long in working time but low in early strength.
The support grouting materials prepared in the examples 1 and 2 have the same problems as the comparative examples 1 and 2 because the retarder is boric acid or tartaric acid, the examples 3 to 5 adopt a mode of compounding boric acid, citric acid and tartaric acid, and have better operability and high early strength compared with the comparative examples 1, 2, 1 and 2, wherein the breaking strength of the example 3 is slightly lower than the specified requirement, the performance completely meets the specified requirement by improving the mortar ratio in the example 4, the production cost is the lowest, the performance of the example 5 is the best, and the invention has important practical application value.
As a secondary reinforcement material of concrete, polyacrylonitrile fiber can obviously improve the toughness and the shock resistance of the concrete and effectively prevent the generation and the development of cracks, and as an industrial fiber product for reinforcing asphalt concrete, the polyacrylonitrile fiber can greatly improve the cohesiveness, the high-temperature stability and the fatigue durability of an asphalt pavement.
The mixing amount of the polyacrylonitrile fiber in each cubic meter of concrete fiber is 0.5-1.0kg, and the mixing amount in the mortar can be lower than that of the concrete.
Example two, Effect of different fibers on the penetration and abrasion resistance of the grouting Material
In order to verify the influence of the fibers on the permeability and wear resistance, the same type and mixing amount of the raw materials are selected in each example group except that the fiber raw materials are different. The other raw materials of each example group in the second example are all of the following types:
the Portland cement is one of P.I 52.5R and P.II 52.5 cement;
the sulphoaluminate cement has the strength grade of 72.5 and is quick-hardening early-strength sulphoaluminate cement;
the silica fume has average particle diameter of 0.1 μm and specific surface area greater than 18700m2/kg；
The mineral powder is S105-grade superfine mineral powder with specific surface area greater than 3000m2/kg；
The fly ash is I-grade fly ash, and the specific surface area is more than 400m2/kg；
The mechanical sand is prepared from the following raw materials in parts by weight of 0.08-0.3 mm: the machine-made sand with three grades of 0.3-0.6 mm and 0.6-1.28 mm is prepared according to the following steps of: 2-4: 1-3; the particle size of the machine-made sand has no significant influence on the technical problem of the invention;
the phosphogypsum is undisturbed phosphogypsum with the grain diameter smaller than 0.3 mm;
the expanding agent is MgO expanding agent;
the water reducing agent is a polycarboxylic acid type water reducing agent;
the defoaming agent is polydimethylsiloxane defoaming agent.
The retarder is a mixture of boric acid, citric acid and tartaric acid, and the mixing proportion is 1 part of boric acid, 1 part of citric acid and 4.5 parts of tartaric acid.
The modification method of the modified polyacrylonitrile fiber in the second embodiment of the invention comprises the following steps:
(1) dissolving 100 parts of polyacrylonitrile, 8 parts of polyamide, 3 parts of sodium carboxymethylcellulose and 4 parts of sodium metaaluminate in dimethylformamide;
(2) after dissolution, heating to 42 ℃, and preserving heat for 1 h;
(3) continuously heating to 70 ℃, keeping the temperature for 3 hours, adding dimethylformamide to a constant volume to obtain a spinning solution, wherein the concentration of the spinning solution is 25-30%;
(4) filtering to remove coagulum and bubbles, sending into a spinning machine for wet spinning, and performing spinning and solidification to obtain the modified polyacrylonitrile fiber.
The formulation of each example set in example two is as follows:
example 2-1
The high-performance building support grouting material comprises the following components in parts by weight:
20 parts of Portland cement and 22 parts of sulphoaluminate cement;
3 parts of silica fume, 4 parts of mineral powder and 4 parts of fly ash;
60 parts of machine-made sand and 2 parts of phosphogypsum;
2 parts of an expanding agent and 0.4 part of a water reducing agent;
0.05 part of defoaming agent and 0.3 part of retarder;
0.3 part of modified polyacrylonitrile fiber.
Examples 2 to 2
The high-performance building support grouting material comprises the following components in parts by weight:
20 parts of Portland cement and 22 parts of sulphoaluminate cement;
3 parts of silica fume, 4 parts of mineral powder and 4 parts of fly ash;
60 parts of machine-made sand and 2 parts of phosphogypsum;
2 parts of an expanding agent and 0.4 part of a water reducing agent;
0.05 part of defoaming agent and 0.3 part of retarder;
0.3 part of commercially available polyacrylonitrile fiber.
Examples 2 to 3
The high-performance building support grouting material comprises the following components in parts by weight:
20 parts of Portland cement and 22 parts of sulphoaluminate cement;
3 parts of silica fume, 4 parts of mineral powder and 4 parts of fly ash;
60 parts of machine-made sand and 2 parts of phosphogypsum;
2 parts of an expanding agent and 0.4 part of a water reducing agent;
0.05 part of defoaming agent and 0.3 part of retarder;
0.3 part of commercially available glass fiber.
Examples 2 to 4
The high-performance building support grouting material comprises the following components in parts by weight:
20 parts of Portland cement and 22 parts of sulphoaluminate cement;
3 parts of silica fume, 4 parts of mineral powder and 4 parts of fly ash;
60 parts of machine-made sand and 2 parts of phosphogypsum;
2 parts of an expanding agent and 0.4 part of a water reducing agent;
0.05 part of defoaming agent and 0.3 part of retarder;
0.3 part of commercially available polypropylene fiber.
And (3) an anti-permeability detection method: and (3) carrying out anti-permeability detection on four example groups in the second example of the invention by referring to JGJ/T70-2009 building mortar basic performance test method standard.
The detection device comprises: digital display cement mortar permeameter-hebei east stone instruments ltd;
a detection step: (1) and (3) carrying out moisture curing for 24 hours after the test body is formed, then demoulding and putting the test body into a curing box to continue curing for 2 days. The temperature in the curing box should be kept at 20 ℃, and the humidity should be kept above 90%; and (4) naturally drying the mortar test piece after the maintenance is finished, and then detecting by using a mortar impermeability instrument.
(2) And 6 test pieces are placed in each test, the test piece is taken out from a wet box one hour before the test, the test piece is sealed in a test mold by using wax, the wax used for sealing needs to be heated until the wax is completely melted, then the test piece is rolled in the melted wax for one week, and then the test piece is immediately placed in the test mold.
(3) Pressurizing from 0.2MPa, increasing to 0.3MPa after constant pressure for 2 hours, pressurizing to 0.1MPa every 1 hour, if the entity has no water seepage phenomenon, continuing pressurizing until the test body begins to seep water, and recording the pressure of the test piece beginning to seep water.
(4) Calculating the mortar impermeability pressure value according to the maximum pressure when 4 test pieces in each group of 6 test pieces are not subjected to water seepage; the 3 groups were measured and the average was calculated.
The wear-resistant detection method comprises the following steps: carrying out an abrasion test on the sample after the maintenance is finished, and detecting by using an abrasion tester; the detection method refers to JTG E30-2005 Cement concrete wear resistance test method
(1) Wiping the moisture on the surface of the test piece, naturally drying for 2h, and then putting the test piece into a drying oven at 60 ℃ for drying to constant weight;
(2) brushing off floating dust on the surface of the test piece by using a brush, and placing the test piece on a turntable of an abrasion resistance tester for detection;
(3) clamping the experiment by using a clamp, removing floating dust again, and recording the current weight;
(4) and rubbing the surface of the test piece by using an abrasion tester, sucking dust by using a dust collector in the rubbing process, and recording the residual mass after treatment.
The results of the impermeability test and the wear resistance test of each example group in the second example of the present invention are as follows:
| group of embodiments | 28d Strength/MPa | Resistance to osmotic pressure Mpa | Amount of wear (kg/m)2) |
| Example 2-1 | 65.4 | 1.70 | 0.84 |
| Examples 2 to 2 | 64.1 | 1.40 | 1.89 |
| Examples 2 to 3 | 68.9 | 0.86 | 2.14 |
| Examples 2 to 4 | 65.7 | 0.94 | 2.02 |
As can be seen from the above, the impermeability and waterproof performance of the modified polyacrylonitrile fiber of the embodiment 2-1 is good, which shows that the modified polyacrylonitrile fiber has a certain improvement on the waterproof performance and the wear resistance of the mortar after the modification of the invention. The unmodified polyacrylonitrile fiber added in the example 2-2 has better anti-permeability performance compared with other example groups, and has a certain difference with the example 2-1, and the two have obvious difference in abrasion resistance performance. Examples 2-3 are glass fibers, which have a greater impact on strength, enabling better 28d strength to be obtained, but have little impact on penetration resistance and wear resistance. Examples 2-4 added another fiber polypropylene fiber which had better water repellency than examples 2-3 but had little effect on abrasion resistance.
Claims (7)
1. The high-performance building support grouting material is characterized by comprising the following components in parts by weight:
15 to 25 portions of Portland cement and 15 to 25 portions of sulphoaluminate cement;
1-5 parts of silica fume, 3-6 parts of mineral powder and 2-5 parts of fly ash;
50-70 parts of machine-made sand, 1-3 parts of phosphogypsum and 0.3-0.5 part of fiber;
1-5 parts of expanding agent and 0.3-0.5 part of water reducing agent;
0.01 to 0.15 portion of defoaming agent and 0.3 to 0.5 portion of retarder.
2. The high performance building support grouting material of claim 1, wherein: comprises the following components in parts by weight:
20 parts of Portland cement and 22 parts of sulphoaluminate cement;
3 parts of silica fume, 4 parts of mineral powder and 4 parts of fly ash;
60 parts of machine-made sand, 2 parts of phosphogypsum and 0.3 part of fiber;
2 parts of an expanding agent and 0.4 part of a water reducing agent;
0.05 part of defoaming agent and 0.3 part of retarder.
3. The high performance building support grouting material of claim 1, wherein:
the silica fume has average particle diameter of 0.1 μm and specific surface area greater than 18700m2/kg；
The mineral powder is S105-grade superfine mineral powder, and the specific surface area is more than 3000m2/kg；
The fly ash is I-grade fly ash, and the specific surface area of the fly ash is more than 400m2/kg。
4. The high performance building support grouting material of claim 1, wherein: the machine-made sand is prepared from the following raw materials in parts by weight of 0.08-0.3 mm: the machine-made sand with three grades of 0.3-0.6 mm and 0.6-1.28 mm is prepared according to the following steps of: 2-4: 1-3; the phosphogypsum is undisturbed phosphogypsum with the grain diameter smaller than 0.3 mm.
5. The high performance building support grouting material of claim 1, wherein:
the swelling agent is one of MgO swelling agent, HCSA swelling agent and CSA swelling agent;
the water reducing agent is a polycarboxylic acid type water reducing agent;
the defoaming agent is a polydimethylsiloxane defoaming agent.
6. The high performance building support grouting material of claim 1, wherein:
the retarder is a mixture of boric acid, citric acid and tartaric acid, and the mixing proportion is 1-2 parts of boric acid, 1 part of citric acid and 4.5-5 parts of tartaric acid.
7. A method for preparing the high performance building support grout of claims 1-6, comprising the steps of:
(1) weighing various raw materials according to the weight proportion; adding the weighed Portland cement, sulphoaluminate cement, silica fume, mineral powder, fly ash, machine-made sand, phosphogypsum and expanding agent into a mixer for mixing;
(2) uniformly mixing the fiber, the water reducing agent, the defoaming agent and the retarder;
(3) and (3) adding the mixture obtained in the step (2) into the mixer obtained in the step (1) and uniformly mixing to prepare the high-performance building support grouting material.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115490496A (en) * | 2022-10-24 | 2022-12-20 | 中建八局第三建设有限公司 | High-strength grouting material and preparation method and application thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1402620A (en) * | 1971-12-28 | 1975-08-13 | Hoechst Ag | Modacrylic filaments and fibres and process for their manufacture |
| JP2015120624A (en) * | 2013-12-25 | 2015-07-02 | 太平洋マテリアル株式会社 | Quick hardening grout composition |
| CN105272070A (en) * | 2015-11-23 | 2016-01-27 | 湖南联智桥隧技术有限公司 | Cement grouting material |
| CN107244855A (en) * | 2017-06-13 | 2017-10-13 | 郑州经纬西部新型建材科技有限公司 | High performance no-contraction cement base grouting material prepared with Machine-made Sand and preparation method thereof |
| CN108164231A (en) * | 2018-01-17 | 2018-06-15 | 湖北恒利建材科技有限公司 | A kind of bridge support grouting material and preparation method thereof |
| CN108947423A (en) * | 2018-08-30 | 2018-12-07 | 成都宏基建材股份有限公司 | A kind of reinforcing bar sleeve for connection grouting material of high fluidity and preparation method thereof |
| CN111978054A (en) * | 2020-07-24 | 2020-11-24 | 广州大学 | Cement-based grouting material and preparation method thereof |
-
2021
- 2021-11-26 CN CN202111423026.3A patent/CN113929422B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1402620A (en) * | 1971-12-28 | 1975-08-13 | Hoechst Ag | Modacrylic filaments and fibres and process for their manufacture |
| JP2015120624A (en) * | 2013-12-25 | 2015-07-02 | 太平洋マテリアル株式会社 | Quick hardening grout composition |
| CN105272070A (en) * | 2015-11-23 | 2016-01-27 | 湖南联智桥隧技术有限公司 | Cement grouting material |
| CN107244855A (en) * | 2017-06-13 | 2017-10-13 | 郑州经纬西部新型建材科技有限公司 | High performance no-contraction cement base grouting material prepared with Machine-made Sand and preparation method thereof |
| CN108164231A (en) * | 2018-01-17 | 2018-06-15 | 湖北恒利建材科技有限公司 | A kind of bridge support grouting material and preparation method thereof |
| CN108947423A (en) * | 2018-08-30 | 2018-12-07 | 成都宏基建材股份有限公司 | A kind of reinforcing bar sleeve for connection grouting material of high fluidity and preparation method thereof |
| CN111978054A (en) * | 2020-07-24 | 2020-11-24 | 广州大学 | Cement-based grouting material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 马正先 等: "马正先 等", 《新型建筑材料》, 31 December 2018 (2018-12-31), pages 36 - 39 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115490496A (en) * | 2022-10-24 | 2022-12-20 | 中建八局第三建设有限公司 | High-strength grouting material and preparation method and application thereof |
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