CN111978054B - Cement-based grouting material and preparation method thereof - Google Patents
Cement-based grouting material and preparation method thereof Download PDFInfo
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- CN111978054B CN111978054B CN202010721018.6A CN202010721018A CN111978054B CN 111978054 B CN111978054 B CN 111978054B CN 202010721018 A CN202010721018 A CN 202010721018A CN 111978054 B CN111978054 B CN 111978054B
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- cement
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- based grouting
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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
- C04B28/06—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
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
-
- 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
Abstract
The invention discloses a cement-based grouting material and a preparation method thereof, wherein the cement-based grouting material comprises the following substances in parts by mass: 700 portions and 760 portions of Portland cement; 40-100 parts of sulphoaluminate cement; 40-60 parts of fly ash; 80-100 parts of mineral powder; 50-70 parts of silica fume; 900 portions of fine aggregate; 5-10 parts of an early strength agent; 8-15 parts of a water reducing agent; 8-14 parts of a defoaming agent; 46-55 parts of an expanding agent; water 260 and 300 portions. This cement base grouting material mixes a certain amount of sulphoaluminate cement in ordinary portland cement, when can ensure the early strength of cement base grouting material, compensaties the problem that ordinary portland cement shrinks early, and the mobility loss rate of the cement base grouting material after half an hour is less, improves the efficiency of construction by a wide margin. The preparation method comprises the following steps: the cement-based grouting material is prepared by mixing and stirring Portland cement, sulphoaluminate cement, fly ash, mineral powder, silica fume, fine aggregate, an early strength agent, a water reducing agent, a defoaming agent and an expanding agent uniformly according to the parts by weight of the materials, and then adding prepared water for mixing to obtain the cement-based grouting material.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a cement-based grouting material and a preparation method thereof.
Background
The cement-based grouting material is a dry mixture produced by factory preparation of raw materials such as cement, aggregate, an additive, a mineral admixture and the like. The method is widely applied to various engineering fields such as high-speed rails, tunnels, mines, ports and docks, high-rise buildings, reinforcement engineering and the like.
The cement-based grouting material used in the current market generally has a series of problems of large volume shrinkage, easy generation of microcracks, slow strength development, insufficient fluidity, poor durability and the like, thereby influencing the structural stability of buildings.
In addition, the common cement-based grouting material needs to use quartz sand as fine aggregate, the cost of the quartz sand is high, and on the other hand, concrete construction waste caused by urban transformation and construction of new buildings is not effectively treated and is randomly stacked or buried, so that the great waste of resources is caused.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the cement-based grouting material which is early-strength, free of shrinkage and good in durability; the other purpose is to provide a method for preparing the cement-based grouting material.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention relates to a cement-based grouting material, which comprises the following substances in parts by mass: 700 portions and 760 portions of Portland cement; 40-100 parts of sulphoaluminate cement; 40-60 parts of fly ash; 80-100 parts of mineral powder; 50-70 parts of silica fume; 900 portions of fine aggregate; 5-10 parts of an early strength agent; 8-15 parts of a water reducing agent; 8-14 parts of a defoaming agent; 46-55 parts of an expanding agent; water 260 and 300 portions. The cement-based grouting material is characterized in that a certain amount of sulphoaluminate cement is doped into ordinary portland cement, so that the problem of early shrinkage of the ordinary portland cement can be solved while the early strength of the cement-based grouting material is better guaranteed, the mobility loss rate of the cement-based grouting material after half an hour is low, and the construction efficiency is greatly improved.
In a preferred embodiment of the present invention, the fine aggregate is composed of quartz sand and regenerated fine powder, the regenerated fine powder being less than 30% by mass of the fine aggregate, the regenerated fine powder being composed of concrete broken into particles. The regenerated micro-fine powder can recycle concrete building wastes to serve as partial fine aggregates, can reduce the production cost, reduce excessive collection of mineral resources such as quartz sand and the like, effectively protect the ecological environment, can increase the fluidity of the cement-based grouting material, and can avoid vibration and self-leveling.
Preferably, in order to reduce the water absorption rate of the regenerated fine and to make the regenerated fine have a certain activity to participate in the hydration reaction, the particle diameter of the regenerated fine is less than 0.15 mm.
Preferably, the mesh number of the quartz sand is 40-70 meshes, and the particle size of the quartz sand is 0.212mm-0.428 mm.
Preferably, the cement-based grouting material also comprises 8-14 parts by mass of a retarder, and the retarder is beneficial to prolonging the setting time of the cement-based grouting material, so that the cement-based grouting material keeps plasticity for a long time and is convenient to pour.
Preferably, the sulphoaluminate cement is low-alkalinity sulphoaluminate cement, and the low-alkalinity sulphoaluminate cement has better early strength performance except lower alkalinity.
Preferably, the early strength agent is a calcium formate type early strength agent, and the early strength agent can further shorten the coagulation time.
Preferably, the retarder is tartaric acid, and the swelling agent is a UEA swelling agent.
The invention also discloses a preparation method of the cement-based grouting material, which comprises the following steps: the cement-based grouting material is prepared by mixing and stirring Portland cement, sulphoaluminate cement, fly ash, mineral powder, silica fume, fine aggregate, an early strength agent, a water reducing agent, a defoaming agent and an expanding agent uniformly according to the parts by weight of the materials, and then adding prepared water for mixing to obtain the cement-based grouting material.
As a preferable embodiment of the above cement-based grouting material, wherein the fine aggregate is composed of quartz sand and regenerated fine powder, the mass part of the regenerated fine powder is less than 30% of the mass part of the fine aggregate, and the particle diameter of the regenerated fine powder is less than 0.15 mm; the regenerated micro-powder is obtained through the following steps: firstly, crushing concrete building wastes into granules, removing large-granule impurities, continuously crushing the rest substances into granules with the grain size of less than 0.15mm to obtain regenerated micro-fine powder, and then combining the regenerated micro-fine powder and quartz sand as fine aggregates to participate in the preparation of the cement-based slurry.
Detailed Description
The invention relates to a cement-based grouting material, which comprises the following substances in parts by mass: 700 portions and 760 portions of Portland cement; 40-100 parts of sulphoaluminate cement; 40-60 parts of fly ash; 80-100 parts of mineral powder; 50-70 parts of silica fume; 900 portions of fine aggregate; 5-10 parts of an early strength agent; 8-15 parts of a water reducing agent; 8-14 parts of a defoaming agent; 46-55 parts of an expanding agent; water 260 and 300 portions. The cement-based grouting material is characterized in that a certain amount of sulphoaluminate cement is doped into ordinary portland cement, so that the problem of early shrinkage of the ordinary portland cement can be solved while the early strength of the cement-based grouting material is better guaranteed, the mobility loss rate of the cement-based grouting material after half an hour is low, and the construction efficiency is greatly improved.
In a preferred embodiment of the present invention, the fine aggregate is composed of quartz sand and regenerated fine powder, the regenerated fine powder being less than 30% by mass of the fine aggregate, the regenerated fine powder being composed of concrete broken into particles. The regenerated micro-fine powder can recycle concrete building wastes to serve as partial fine aggregates, can reduce the production cost, reduce excessive collection of mineral resources such as quartz sand and the like, effectively protect the ecological environment, can increase the fluidity of the cement-based grouting material, and can avoid vibration and self-leveling.
Preferably, in order to reduce the water absorption rate of the regenerated fine and to make the regenerated fine have a certain activity to participate in the hydration reaction, the particle diameter of the regenerated fine is less than 0.15 mm.
Wherein the mesh number of the quartz sand is 40-70 meshes, and the particle size of the quartz sand is 0.212mm-0.428 mm; the sulphoaluminate cement is low-alkalinity sulphoaluminate cement; the early strength agent is a calcium formate type early strength agent; the retarder is tartaric acid; the swelling agent is UEA swelling agent; the fly ash is II-grade fly ash, the mineral powder is S95-grade ground mineral powder, and the specific surface area of the silica fume is 22200m2Kg, density 2700Kg/m3。
Preferably, the cement-based grouting material also comprises 8-14 parts by mass of a retarder, and the retarder is beneficial to prolonging the setting time of the cement-based grouting material, so that the cement-based grouting material keeps plasticity for a long time and is convenient to pour.
The invention also discloses a preparation method of the cement-based grouting material, which comprises the following steps: the method comprises the steps of mixing and stirring Portland cement, sulphoaluminate cement, fly ash, mineral powder, silica fume, fine aggregate, an early strength agent, a water reducing agent, a defoaming agent and an expanding agent uniformly according to the parts by weight of the materials, adding prepared water, and stirring until the mixture is in a self-flowing state for pouring.
As a preferable embodiment of the above cement-based grouting material, wherein the fine aggregate is composed of quartz sand and regenerated fine powder, the mass part of the regenerated fine powder is less than 30% of the mass part of the fine aggregate, and the particle diameter of the regenerated fine powder is less than 0.15 mm; the regenerated micro-powder is obtained through the following steps: firstly, crushing concrete building wastes into granules, removing large-granule impurities, wherein the large-granule impurities can be removed manually, then continuously crushing the residual substances to granules with the grain diameter of less than 0.15mm to obtain regenerated micro-fine powder, and further combining the regenerated micro-fine powder and quartz sand as fine aggregates to participate in the preparation of cement-based slurry.
In order to characterize the cement-based grouting material after the incorporation of the regenerated fines, several examples of the cement-based grouting material of the present invention are given below:
example 1
The cement-based grouting material comprises the following substances in parts by mass: 752 parts of portland cement, 48 parts of low-alkalinity sulphoaluminate cement, 60 parts of fly ash, 90 parts of mineral powder, 50 parts of silica fume, 55 parts of regenerated micropowder, 1045 parts of quartz sand, 10 parts of water reducing agent, 8 parts of defoaming agent, 8 parts of retarder, 8 parts of early strength admixture, 46 parts of expanding agent and 260 parts of water. Namely, the mass ratio of the regenerated micro powder to the quartz sand is 1:19, and the proportion of the regenerated micro powder replacing the quartz sand is 5%.
The invention is detected according to the standard JGT 408-2013 grouting sleeve for connecting steel bars, and the following table is obtained:
example 2
The cement-based grouting material comprises the following substances in parts by mass: 752 parts of portland cement, 48 parts of low-alkalinity sulphoaluminate cement, 60 parts of fly ash, 90 parts of mineral powder, 50 parts of silica fume, 110 parts of regenerated fine powder, 990 parts of quartz sand, 9 parts of water reducing agent, 10 parts of defoaming agent, 9 parts of retarder, 8 parts of early strength agent, 46 parts of expanding agent and 260 parts of water. Namely, the mass ratio of the regenerated micro powder to the quartz sand is 1:9, and the proportion of the regenerated micro powder replacing the quartz sand is 10%.
The invention is detected according to the standard JGT 408-2013 grouting sleeve for connecting steel bars, and the following table is obtained:
example 3
The cement-based grouting material comprises the following substances in parts by mass: 752 parts of portland cement, 48 parts of low-alkalinity sulphoaluminate cement, 60 parts of fly ash, 90 parts of mineral powder, 50 parts of silica fume, 165 parts of regenerated fine powder, 935 parts of quartz sand, 8 parts of water reducing agent, 8 parts of early strength agent, 10 parts of defoaming agent, 8 parts of retarder, 46 parts of expanding agent and 260 parts of water. Namely, the mass ratio of the regenerated micro powder to the quartz sand is 3:17, and the proportion of the regenerated micro powder replacing the quartz sand is 15%.
The invention is detected according to the standard JGT 408-2013 grouting sleeve for connecting steel bars, and the following table is obtained:
example 4
The cement-based grouting material comprises the following substances in parts by mass: 752 parts of portland cement, 48 parts of low-alkalinity sulphoaluminate cement, 60 parts of fly ash, 90 parts of mineral powder, 50 parts of silica fume, 220 parts of regenerated fine powder, 880 parts of quartz sand, 8 parts of water reducing agent, 10 parts of defoaming agent, 8 parts of retarder, 46 parts of expanding agent, 8 parts of early strength agent and 260 parts of water. Wherein, the mass ratio of the regenerated micro powder to the quartz sand is 1:4, and the proportion of the regenerated micro powder replacing the quartz sand is 20%.
The invention is detected according to the standard JGT 408-2013 grouting sleeve for connecting steel bars, and the following table is obtained:
for comparison with the above examples 1, 2, 3, 4, comparative example 1 in which the fine aggregate was entirely quartz sand is given below.
Comparative example 1
The cement-based grouting material comprises the following substances in parts by mass: 752 parts of portland cement, 48 parts of low-alkalinity sulphoaluminate water, 60 parts of fly ash, 90 parts of mineral powder, 50 parts of silica fume, 1100 parts of quartz sand, 8 parts of an early strength agent, 14 parts of a water reducing agent, 12 parts of a defoaming agent, 9 parts of a retarder, 54 parts of an expanding agent and 260 parts of water. Wherein, quartz sand is used for all the fine aggregates.
The invention is detected according to the standard JGT 408-2013 grouting sleeve for connecting steel bars, and the following table is obtained:
the properties of the examples are compared with those of comparative example 1 below and the following tabular data are tabulated:
all indexes in the embodiment 1 are superior to those in the comparative example 1, namely, the performance of the cement-based grouting material can be effectively improved by doping 5% of regenerated fine powder to replace quartz sand, and the cement-based grouting material has the characteristics of early strength, good fluidity, high strength and the like. The regenerated micro-powder after being finely ground still retains certain activity and participates in the hydration reaction of cement, and the generated hydration product further improves the later strength of the grouting material. In addition, the regenerated fine powder has smaller particle size than quartz sand particles, the ball effect is more obvious, and the fluidity is also improved to a certain extent. When the content of the reclaimed fine powder was 10%, the properties were comparable to those of comparative example 1. When the mixing amount of the regenerated micro-powder is 15% and 20%, the cement-based grouting material is reduced in strength indexes to different degrees, and the effect of the regenerated micro-powder on improving the cement-based grouting material is weaker than the adverse effect of the regenerated micro-powder, which is caused by the fact that the regenerated micro-powder contains impurities and has a certain water absorption rate. In the aspect of manufacturing cost, the regenerated micro-fine powder is used for replacing part of quartz sand, so that the production cost can be greatly reduced, and the method has economical efficiency and practicability.
The above examples are merely preferred embodiments of the present invention, and other embodiments of the present invention are possible, such as a reasonable combination of the technical solutions described in the examples. Those skilled in the art can make equivalent changes or substitutions without departing from the spirit of the present invention, and such equivalent changes or substitutions are included in the scope set forth in the claims of the present application.
Claims (9)
1. The cement-based grouting material is characterized by comprising the following substances in parts by mass:
700 portions and 760 portions of Portland cement; 40-100 parts of sulphoaluminate cement; 40-60 parts of fly ash; 80-100 parts of mineral powder; 50-70 parts of silica fume; 900 portions of fine aggregate; 5-10 parts of an early strength agent; 8-15 parts of a water reducing agent; 8-14 parts of a defoaming agent; 46-55 parts of an expanding agent; water 260-300 parts;
the fine aggregate is composed of quartz sand and regenerative fine powder, the mass part of the regenerative fine powder is less than 30% of that of the fine aggregate, and the regenerative fine powder is formed by breaking concrete into particles.
2. A cement-based grouting material as claimed in claim 1, characterized in that:
the particle diameter of the regenerated fine powder is less than 0.15 mm.
3. A cement-based grouting material as claimed in claim 1, characterized in that:
the mesh number of the quartz sand is 40-70 meshes, and the particle size of the quartz sand is 0.212mm-0.428 mm.
4. A cement-based grouting material as claimed in claim 1, characterized in that:
the cement-based grouting material also comprises 8-14 parts of retarder by mass.
5. A cement-based grouting material as claimed in claim 1, characterized in that:
the sulphoaluminate cement is low-alkalinity sulphoaluminate cement.
6. A cement-based grouting material as claimed in claim 1, characterized in that:
the early strength agent is a calcium formate type early strength agent.
7. A cement-based grouting material as claimed in claim 1, characterized in that:
the retarder is tartaric acid, and the swelling agent is UEA swelling agent.
8. The preparation method of the cement-based grouting material is characterized by comprising the following steps:
the cement-based grouting material is prepared by mixing and stirring Portland cement, sulphoaluminate cement, fly ash, mineral powder, silica fume, fine aggregate, an early strength agent, a water reducing agent, a defoaming agent and an expanding agent uniformly according to the parts by weight of the materials, and then adding prepared water for mixing to obtain the cement-based grouting material.
9. The method for preparing a cement-based grouting material according to claim 8, characterized in that:
the fine aggregate is composed of quartz sand and regenerated fine powder, the mass part of the regenerated fine powder is less than 30% of that of the fine aggregate, and the particle diameter of the regenerated fine powder is less than 0.15 mm; the regenerated micro-powder is obtained through the following steps: firstly, crushing the concrete building wastes into granules, removing large-granule impurities, and continuously crushing the rest substances into granules with the grain diameter of less than 0.15mm, thereby obtaining the regenerated micro-powder.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112745093A (en) * | 2021-01-11 | 2021-05-04 | 湖北工业大学 | Early-strength high-temperature-resistant sleeve grouting material and preparation method thereof |
| CN113501695A (en) * | 2021-07-29 | 2021-10-15 | 武汉磊固实业有限公司 | Non-shrinkage ultrahigh-strength regenerated grouting material and preparation method thereof |
| CN113929422B (en) * | 2021-11-26 | 2022-06-28 | 中建西部建设新材料科技有限公司 | High-performance building support grouting material and preparation method thereof |
| CN114368943A (en) * | 2021-12-22 | 2022-04-19 | 广州肖宁道路工程技术研究事务所有限公司 | Cement-based material and preparation method and application thereof |
| CN115010446A (en) * | 2022-04-13 | 2022-09-06 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Salt-fog-corrosion-resistant mortar for high-speed railway bridge support and preparation method thereof |
| CN115925374A (en) * | 2022-11-24 | 2023-04-07 | 临海市忠信新型建材有限公司 | Quick-hardening early-strength cement-based grouting material for stabilizing bridge support base plate and preparation method thereof |
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| JPWO2007138648A1 (en) * | 2006-05-25 | 2009-10-01 | 日鐵セメント株式会社 | Injection material |
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| CN103182339A (en) * | 2011-12-31 | 2013-07-03 | 上海德滨环保科技有限公司 | Special drying type cone-cavity mill for producing powder from construction wastes |
| CN107602006A (en) * | 2017-08-28 | 2018-01-19 | 四川双铁科技有限公司 | A kind of grouting material for sound barrier backboard |
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