CN113292300A - High-fluidity ultrahigh-strength cement-based grouting material and preparation method thereof - Google Patents
High-fluidity ultrahigh-strength cement-based grouting material and preparation method thereof Download PDFInfo
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- CN113292300A CN113292300A CN202110578128.6A CN202110578128A CN113292300A CN 113292300 A CN113292300 A CN 113292300A CN 202110578128 A CN202110578128 A CN 202110578128A CN 113292300 A CN113292300 A CN 113292300A
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- 239000004568 cement Substances 0.000 title claims abstract description 98
- 239000000463 material Substances 0.000 title claims abstract description 95
- 238000002360 preparation method Methods 0.000 title abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 52
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000006004 Quartz sand Substances 0.000 claims abstract description 26
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 25
- 239000000701 coagulant Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 5
- 238000009792 diffusion process Methods 0.000 claims abstract description 4
- 238000013508 migration Methods 0.000 claims abstract 2
- 230000005012 migration Effects 0.000 claims abstract 2
- 239000000843 powder Substances 0.000 claims description 26
- 239000000203 mixture Substances 0.000 claims description 17
- 238000003756 stirring Methods 0.000 claims description 14
- 239000011398 Portland cement Substances 0.000 claims description 13
- 239000010881 fly ash Substances 0.000 claims description 13
- 229910052602 gypsum Inorganic materials 0.000 claims description 13
- 239000010440 gypsum Substances 0.000 claims description 13
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 13
- 239000011707 mineral Substances 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 13
- 239000010453 quartz Substances 0.000 claims description 13
- 229910021487 silica fume Inorganic materials 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 8
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 7
- 239000011575 calcium Substances 0.000 claims description 7
- 229910052791 calcium Inorganic materials 0.000 claims description 7
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 7
- 239000000292 calcium oxide Substances 0.000 claims description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 7
- 238000009736 wetting Methods 0.000 claims description 7
- 238000009826 distribution Methods 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 4
- 230000014759 maintenance of location Effects 0.000 claims description 3
- 230000008961 swelling Effects 0.000 claims 6
- 238000010276 construction Methods 0.000 abstract description 25
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000009776 industrial production Methods 0.000 abstract description 3
- 150000001450 anions Chemical class 0.000 abstract 1
- 150000001768 cations Chemical class 0.000 abstract 1
- 230000008595 infiltration Effects 0.000 abstract 1
- 238000001764 infiltration Methods 0.000 abstract 1
- 239000011148 porous material Substances 0.000 abstract 1
- 239000004567 concrete Substances 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 239000004576 sand Substances 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 239000004566 building material Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000003763 carbonization Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 150000001804 chlorine Chemical class 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—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
-
- 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
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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 discloses a high-fluidity ultrahigh-strength cement-based grouting material which comprises the following components in parts by weight: 10-30 parts of water, 50-150 parts of cementing material, 60-100 parts of quartz sand, 1-5 parts of water reducing agent, 0.1-3 parts of coagulant and 0.01-0.1 part of expanding agent. The cement-based grouting material disclosed by the invention has the characteristics of low viscosity, high fluidity, early strength, ultrahigh strength, high toughness, ultrahigh durability, micro-expansion, high compactness, shrinkage resistance and the like, is low in cost, and can meet the requirement of environmental protection. The chlorine ion migration diffusion coefficient of the ultrahigh-strength cement-based grouting material with high fluidity<10‑13The pores are few, and the grouting material can well resist the infiltration of water and various anions and cations, so the grouting material is extremely suitable for the grouting construction of offshore structures. The invention also discloses a preparation method of the high-fluidity ultrahigh-strength cement-based grouting material, which is simple and easy to operate, and is used for preparing stripsThe parts are easy to control, the requirement on production equipment is low, and the method is easy to realize industrial production.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a high-fluidity ultrahigh-strength cement-based grouting material and a preparation method thereof, which are suitable for offshore engineering projects.
Background
The cement-based grouting material is a dry mixed material which is composed of cement as a basic material, a proper amount of fine aggregate, a small amount of concrete admixture and other materials, and has the performances of high fluidity, early strength, high strength, micro-expansion, compactness and the like after being mixed by adding water.
With the continuous expansion of urban scale and the continuous deepening and perfecting of infrastructure construction in China, the construction of heavy industry which is developed from extensive type to intensive type is fiercely, various large-scale and special-shaped structures are generated, the requirements of different structures and different service conditions on the performance of materials are different, and the requirements of socialized mass production on the production efficiency are higher and higher. The material has relatively high performance requirements when being built in construction engineering or special parts under severe environment and construction environment with special performance requirements, and conventional materials are difficult to meet the requirements, such as the construction engineering in marine chlorine salt corrosion resistant environment, the construction engineering in northern freeze-thaw resistant environment of China, pavement engineering in long-term wear environment and the like, and also such as grouting of large machine foundation bases or foundation bolts, reinforcing of buildings or roads, secondary grouting between a steel structure and a foundation and the like. The difficulty of different engineering constructions, the construction period requirements of owners and artificial engineering quality control levels are different, and the factors can increase the performance requirements of the engineering on materials. Especially, with the vigorous development of marine industry in China, common building materials are difficult to be qualified in severe marine environments, and the building materials suitable for the marine saline-alkali corrosion working conditions are in urgent need of development.
The concrete used in the field is mostly formed by processing sand, stones, water and cement according to the traditional process in a quantitative matching manner, and due to the difference of raw materials, the prepared concrete has the defects of high density, poor segregation resistance of the concrete, large using amount of the cement, short setting time of the concrete and the like, so that the problems of high construction difficulty, long construction period, high cost input, poor practicability, low reliability, poor construction quality and the like in the later period are caused, and the conventional concrete material cannot meet the requirements of actual production, so that the grouting material with high early strength and ultrahigh strength is produced.
Meanwhile, in the engineering practice process, when high-performance cement component materials such as low viscosity, high flow state, ultrahigh strength, micro-expansion, early strength and the like need to be used, most of the cement component materials are prepared on site. The concrete is prepared for use, so that the project progress is influenced; secondly, the performance of the mixture is unstable, which affects the engineering quality; thirdly, mixing on site and polluting the environment. In actual construction engineering, the amount of cement components with special properties required by special parts and special environments is usually small, but the functions of the cement components are extremely critical, and the cement-based grouting material is specially designed, tested and produced, so that the cement-based grouting material is not cost-effective in technical and economic aspects, and the research and development of the cement-based grouting material capable of meeting various properties of different special parts have important practical significance.
In the prior art, the related research results of the novel cement component material mixture which can meet the requirements of different special parts are relatively abundant, but the following problems also exist: research results are only focused on one aspect or a plurality of aspects, and the performance is relatively single; although more researches are carried out on the ultra-high strength cement-based premix at present, the defects such as larger shrinkage and the like still exist; the common ultrahigh-performance grouting material in the market is usually an organic premix, has higher cost and greater environmental pollution, and cannot meet the requirement of environmental protection.
Therefore, it is of practical significance to develop a grouting material which can meet the requirements of the privileged construction environment, has various performances such as low viscosity, high fluidity, early strength, ultrahigh strength, high toughness, ultrahigh durability, micro-expansion, high compactness and the like, and has the characteristics of shrinkage resistance, low cost, environmental protection and the like.
Disclosure of Invention
In order to overcome the defects of the prior art, one of the objectives of the present invention is to provide a high-fluidity ultrahigh-strength cement-based grouting material, which has the characteristics of low viscosity, high fluidity, early strength, ultrahigh strength, high toughness, ultrahigh durability, micro-expansion, high compactness, shrinkage resistance and the like, and is low in cost and capable of meeting the requirements of environmental protection.
The second object of the present invention is to provide a method for preparing a high-fluidity ultrahigh-strength cement-based grouting material, which is simple, easy to operate, easy to control the preparation conditions, and has low requirements for production equipment, and is a method that can easily implement industrial production.
One of the purposes of the invention is realized by adopting the following technical scheme:
the ultrahigh-strength cement-based grouting material with high fluidity is characterized by comprising the following components in parts by weight:
10-30 parts of water, 50-150 parts of cementing material, 60-100 parts of quartz sand, 1-5 parts of water reducing agent, 0.1-3 parts of coagulant and 0.01-0.1 part of expanding agent.
Further, the cementing material comprises the following components:
P.I 52.5 ordinary portland cement, sulphoaluminate cement, silica fume, superfine mineral powder, superfine fly ash, gypsum and quartz powder, and the percentage ratio is as follows: p · I52.5 ordinary portland cement: sulphoaluminate cement: silica fume: superfine mineral powder: ultra-fine fly ash: gypsum: and (3) quartz powder is 50-55: 5: 10-15: 10-12: 5: 10: 5.
further, the apparent density of the quartz sand is 2500kg/m3-2700kg/m3The particle size of the quartz sand is 20-100 meshes. The particle size distribution is as follows: 20-40 meshes: 40-70 meshes: 70-110 mesh ═ 2:5: 3.
further, the water reducing agent comprises a polycarboxylic acid water reducing agent.
Further, the expanding agent is one or the combination of more than two of plastic expanding agent, calcium sulphoaluminate expanding agent and calcium oxide expanding agent, and the 3-hour limited expansion rate of the expanding agent is 0.1-0.3%.
Further, the initial setting time of the high-fluidity ultrahigh-strength cement-based grouting material is more than or equal to 60 min.
Furthermore, the 1-day compressive strength of the high-fluidity ultrahigh-strength cement-based grouting material is more than or equal to 35MPa, the 3-day compressive strength is more than or equal to 70MPa, and the 28-day compressive strength is more than or equal to 120 MPa.
Further, the initial fluidity of the high-fluidity ultrahigh-strength cement-based grouting material is more than or equal to 360mm, and the fluidity retention value for 30min is more than or equal to 330 mm.
Further, the high-fluidity ultrahigh-strength cement-based grouting material has freeze-thaw resistance cycle of more than 1000 times and RCM chloride ion diffusion coefficient of less than 10-13。
The second purpose of the invention is realized by adopting the following technical scheme:
the preparation method of the ultrahigh-strength cement-based grouting material with high fluidity is characterized by comprising the following steps of:
and (3) mixing: wetting a cylinder of a stirrer, adding the cement, quartz sand, a coagulant and an expanding agent according to the formula amount, and stirring for 2-3min to obtain a mixture;
and (3) preparing a finished product: and adding the water reducing agent and the water in the formula amount into the mixture, and continuously stirring for 2-3 minutes to obtain the high-fluidity ultrahigh-strength cement-based grouting material.
Compared with the prior art, the invention has the beneficial effects that:
1. the high-fluidity ultrahigh-strength cement-based grouting material disclosed by the invention has various characteristics of low viscosity, high fluidity, early strength, ultrahigh strength, high toughness, ultrahigh durability, micro-expansion, high compactness, shrinkage resistance and the like by reasonably proportioning water, cement, quartz sand, a water reducing agent, a coagulant and an expanding agent, can adapt to construction requirements of various privileged environments and privileged structural parts, and is particularly suitable for special-shaped structures which are difficult to construct. The grouting material has extremely superior construction effects on the constructions such as large-scale machine foundation grouting, fan power generation foundation grouting, road and bridge engineering reinforcement and the like. Meanwhile, it enables the constructed structure to have a compact effect by self-flowing by using the ultra-high fluidity of the cement-based grouting material mixture. The cement-based grouting material has a micro-expansion characteristic, and thus is an excellent material suitable for grouting. Moreover, the components of the cement-based grouting material are common raw materials in the market, so the cost is lower and the construction cost can be reduced.
2. The high-fluidity ultrahigh-strength cement-based grouting material has the characteristics of early strength and ultrahigh strength, has good stability, can complete initial setting within 1 hour, has the 1d strength of more than 35MPa, and is suitable for rush-repair engineering or construction period engineering. The ultrahigh-strength cement-based grouting material can solve the problems of construction and pouring of special-shaped structures with short construction period and durability under the condition of ocean salt corrosion, and has the advantages of convenient construction, reliable quality, long service time and strong environmental adaptability.
3. The high-fluidity ultrahigh-strength cement-based grouting material disclosed by the invention has the advantages of compact and uniform building entity, extremely strong durability, water permeability resistance (the impermeability grade is not less than P35), carbonization resistance (the carbonization depth is 0mm) and freeze-thaw resistance (the freeze-thaw resistance cycle)>1000 times), sulfate erosion resistance (the corrosion resistance coefficient is more than or equal to KS150), and chloride erosion Resistance (RCM)<10-13) And the fluidity loss value is extremely small, and the method is suitable for the dry-wet cycle environment of the marine salt.
4. The high-fluidity ultrahigh-strength cement-based grouting material adjusts the initial setting time and the final setting time by adjusting the dosage of the coagulant and the proportion of the coagulant, cement and the water reducing agent, and in the proportion, the initial setting time of the cement-based grouting material can be advanced to 60min on the premise of ensuring the fluidity of 30min by the coagulant.
5. The preparation method of the high-fluidity ultrahigh-strength cement-based grouting material is simple and convenient to operate, easy to control the preparation conditions, low in requirements on production equipment and easy to realize industrial production.
Detailed Description
The present invention is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment. The equipment and raw materials used are all available on the market or commonly used in the field. The methods in the following examples are conventional in the art unless otherwise specified.
A high-fluidity ultrahigh-strength cement-based grouting material comprises the following components in parts by weight:
10-30 parts of water, 50-150 parts of cementing material, 60-100 parts of quartz sand, 1-5 parts of water reducing agent, 0.1-3 parts of coagulant and 0.01-0.1 part of expanding agent.
As a further embodiment, the cementitious material comprises the following components:
P.I 52.5 ordinary portland cement, sulphoaluminate cement, silica fume, superfine mineral powder, superfine fly ash, gypsum and quartz powder, and the percentage ratio is as follows: p · I52.5 ordinary portland cement: sulphoaluminate cement: silica fume: superfine mineral powder: ultra-fine fly ash: gypsum: and (3) quartz powder is 50-55: 5: 10-15: 10-12: 5: 10: 5.
as a further embodiment, the apparent density of the silica sand is 2500kg/m3-2700kg/m3The particle size of the quartz sand is 20-100 meshes. The particle size distribution is as follows: 20-40 meshes: 40-70 meshes: 70-110 mesh ═ 2:5: 3.
as a further embodiment, the water reducer comprises a polycarboxylic acid water reducer.
In a further embodiment, the expanding agent is one or a combination of more than two of a plastic expanding agent, a calcium sulphoaluminate expanding agent and a calcium oxide expanding agent, and the 3-hour limited expansion rate of the expanding agent is 0.1-0.3%.
As a further embodiment, the initial setting time of the high-fluidity ultrahigh-strength cement-based grouting material is more than or equal to 60 min.
As a further embodiment, the initial fluidity of the high-fluidity ultrahigh-strength cement-based grouting material is more than or equal to 360mm, and the fluidity retention value is more than or equal to 330mm in 30 min.
As a further embodiment, the high fluidity ultra high strength cement based grouting material has a freeze thaw resistance cycle > 1000 times and an RCM chloride ion diffusion coefficient < 10-13。
The preparation method of the ultrahigh-strength cement-based grouting material with high fluidity comprises the following steps:
and (3) mixing: wetting a cylinder of a stirrer, adding the cement, quartz sand, a coagulant and an expanding agent according to the formula amount, and stirring for 2-3min to obtain a mixture;
and (3) preparing a finished product: adding the water reducing agent and the water with the formula amount into the mixture, and continuously stirring for 2-3 minutes to obtain the high-fluidity ultrahigh-strength cement-based grouting material.
Example 1:
a high-fluidity ultrahigh-strength cement-based grouting material comprises the following components in parts by weight:
10 parts of water, 50 parts of cementing materials, 60 parts of quartz sand, 5 parts of water reducing agent, 3 parts of coagulant and 0.1 part of expanding agent.
Wherein, the cement comprises the following components: P.I 52.5 ordinary portland cement, sulphoaluminate cement, silica fume, fine mineral powder, ultrafine fly ash, gypsum and quartz powder. The apparent density of the quartz sand is 2500kg/m3The particle size of the quartz sand was 70 mesh. The water reducing agent is a polycarboxylic acid water reducing agent.
The expanding agent is plastic expanding agent, calcium sulphoaluminate expanding agent and calcium oxide expanding agent, and the 3-hour limited expansion rate of the expanding agent is 0.1 percent.
The preparation method of the ultrahigh-strength cement-based grouting material with high fluidity comprises the following steps:
and (3) mixing: wetting a cylinder of a stirrer, adding the cement, quartz sand, a coagulant and an expanding agent according to the formula amount, and stirring for 3min to obtain a mixture;
and (3) preparing a finished product: and adding the water reducing agent and the water in the formula amount into the mixture, and continuously stirring for 2 minutes to obtain the high-fluidity ultrahigh-strength cement-based grouting material.
Example 2:
a high-fluidity ultrahigh-strength cement-based grouting material comprises the following components in parts by weight:
30 parts of water, 150 parts of cementing materials, 100 parts of quartz sand, 1 part of water reducing agent, 0.1 part of coagulant and 0.01 part of expanding agent.
Wherein the cementing material comprises P.I 52.5 ordinary portland cement, sulphoaluminate cement, silica fume, superfine mineral powder, superfine fly ash, gypsum and quartz powder, and the percentage ratio is as follows: p · I52.5 ordinary portland cement: sulphoaluminate cement: silica fume: superfine mineral powder: ultra-fine fly ash: gypsum: and (3) quartz powder is 50-55: 5: 10-15: 10-12: 5: 10: 5.
as a further embodiment, the apparent density of the silica sand is 2500kg/m3-2700kg/m3The particle size of the quartz sand is 20-100 meshes. The particle size distribution is as follows: 20-40 meshes: 40-70 meshes: 70-110 mesh ═ 2:5: 3.
the expanding agent is plastic expanding agent, calcium sulphoaluminate expanding agent and calcium oxide expanding agent, and the 3-hour limited expansion rate of the expanding agent is 0.1-0.3%.
The preparation method of the ultrahigh-strength cement-based grouting material with high fluidity comprises the following steps:
and (3) mixing: wetting a cylinder of a stirrer, adding the cement, quartz sand, a coagulant and an expanding agent according to the formula amount, and stirring for 2min to obtain a mixture;
and (3) preparing a finished product: and adding the water reducing agent and the water in the formula amount into the mixture, and continuously stirring for 2 minutes to obtain the high-fluidity ultrahigh-strength cement-based grouting material.
Example 3:
a high-fluidity ultrahigh-strength cement-based grouting material comprises the following components in parts by weight:
17 parts of water, 100 parts of cementing materials, 83 parts of quartz sand, 3.2 parts of water reducing agent, 0.3 part of coagulant and 0.05 part of expanding agent.
Wherein the cementing material comprises P.I 52.5 ordinary portland cement, sulphoaluminate cement, silica fume, superfine mineral powder, superfine fly ash, gypsum and quartz powder, and the percentage ratio is as follows: p · I52.5 ordinary portland cement: sulphoaluminate cement: silica fume: superfine mineral powder: ultra-fine fly ash: gypsum: and (3) quartz powder is 50-55: 5: 10-15: 10-12: 5: 10: 5.
as a further embodiment, the apparent density of the silica sand is 2500kg/m3-2700kg/m3The particle size of the quartz sand is 20-100 mesh. The particle size distribution is as follows: 20-40 meshes: 40-70 meshes: 70-110 mesh ═ 2:5: 3.
the expanding agent is plastic expanding agent, calcium sulphoaluminate expanding agent and calcium oxide expanding agent, and the 3-hour limited expansion rate of the expanding agent is 0.3 percent.
The preparation method of the ultrahigh-strength cement-based grouting material with high fluidity comprises the following steps:
and (3) mixing: wetting a cylinder of a stirrer, adding the cement, quartz sand, a coagulant and an expanding agent according to the formula amount, and stirring for 3min to obtain a mixture;
and (3) preparing a finished product: and adding the water reducing agent and the water in the formula amount into the mixture, and continuously stirring for 3 minutes to obtain the high-fluidity ultrahigh-strength cement-based grouting material.
Example 4:
a high-fluidity ultrahigh-strength cement-based grouting material comprises the following components in parts by weight:
19 parts of water, 100 parts of cementing materials, 83 parts of quartz sand, 3.2 parts of water reducing agent, 1 part of coagulant and 0.06 part of expanding agent.
Wherein the cementing material comprises P.I 52.5 ordinary portland cement, sulphoaluminate cement, silica fume, superfine mineral powder, superfine fly ash, gypsum and quartz powder, and the percentage ratio is as follows: p · I52.5 ordinary portland cement: sulphoaluminate cement: silica fume: superfine mineral powder: ultra-fine fly ash: gypsum: and (3) quartz powder is 50-55: 5: 10-15: 10-12: 5: 10: 5.
as a further embodiment, the apparent density of the silica sand is 2500kg/m3-2700kg/m3The particle size of the quartz sand is 20-100 meshes. The particle size distribution is as follows: 20-40 meshes: 40-70 meshes: 70-110 mesh ═ 2:5: 3.
the expanding agent is plastic expanding agent, calcium sulphoaluminate expanding agent and calcium oxide expanding agent, and the 3-hour limited expansion rate of the expanding agent is 0.1-0.3%.
The preparation method of the ultrahigh-strength cement-based grouting material with high fluidity comprises the following steps:
and (3) mixing: wetting a cylinder of a stirrer, adding the cement, quartz sand, a coagulant and an expanding agent according to the formula amount, and stirring for 3min to obtain a mixture;
and (3) preparing a finished product: and adding the water reducing agent and the water in the formula amount into the mixture, and continuously stirring for 2 minutes to obtain the high-fluidity ultrahigh-strength cement-based grouting material.
Verification of the examples:
the advantageous effects of the high fluidity ultrahigh strength cement-based grouting material of the present invention are further illustrated by the following tests.
And (3) performance testing:
the high fluidity ultrahigh strength cement-based grouting materials of examples 1 to 4 were subjected to performance tests, and the results of the performance tests are shown in table 1.
Table 1 shows the results of performance tests of the high fluidity ultrahigh strength cement-based grouting materials of examples 1 to 4:
as can be seen from Table 1, the ultrahigh-strength cement-based grouting material with high fluidity has the characteristics of early strength and ultrahigh strength, has good stability, can complete initial setting within 1 hour, has the strength within 1d of more than 35MPa, and is suitable for rush-repair engineering or construction period-up engineering. Has the performance of resisting the corrosion of chloride salt and can solve the durability problem under the condition of marine salt corrosion. The low viscosity and high fluidity are also realized, and the fluidity loss value is extremely low; the special-shaped structure has the characteristics of high toughness, ultrahigh durability, micro-expansion, high compactness, contraction resistance and the like, can meet the construction requirements of various privileged environments and privileged structure parts, is particularly suitable for the construction perfusion problem of special-shaped structures with short construction periods and the durability problem under the condition of marine salt erosion, and has long service time and strong environmental adaptability.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention should not be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (9)
1. The ultrahigh-strength cement-based grouting material with high fluidity is characterized by comprising the following components in parts by weight:
10-30 parts of water, 50-150 parts of cementing material, 60-100 parts of quartz sand, 1-5 parts of water reducing agent, 0.1-3 parts of coagulant and 0.01-0.1 part of expanding agent.
2. A high-fluidity, ultra-high strength cement-based grouting material according to claim 1, wherein the cement material comprises the following components:
P.I 52.5 ordinary portland cement, sulphoaluminate cement, silica fume, superfine mineral powder, superfine fly ash, gypsum and quartz powder, and the percentage ratio is as follows: p · I52.5 ordinary portland cement: sulphoaluminate cement: silica fume: superfine mineral powder: ultra-fine fly ash: gypsum: and (3) quartz powder is 50-55: 5: 10-15: 10-12: 5: 10: 5.
3. a high-fluidity ultra-high strength cement-based grouting material according to claim 1, wherein the apparent density of the quartz sand is 2500kg/m3-2700kg/m3The particle size of the quartz sand is 20-110 meshes. The particle size distribution is as follows: 20-40 meshes: 40-70 meshes: 70-110 mesh ═ 2:5: 3.
4. the high-fluidity ultrahigh-strength cement-based grouting material according to claim 1, wherein the water reducing agent is an ultrahigh-performance polycarboxylic acid water reducing agent.
5. A high-fluidity ultrahigh-strength cement-based grouting material according to claim 1, wherein the swelling agent is one or a combination of two or more of a plastic swelling agent, a calcium sulfoaluminate swelling agent and a calcium oxide swelling agent, and the 3 h-limited swelling ratio of the swelling agent is 0.02 to 2.0%.
6. A high-fluidity ultrahigh-strength cement-based grouting material as claimed in claim 1, wherein the initial setting time of the high-fluidity ultrahigh-strength cement-based grouting material is not less than 60 min.
7. A high-fluidity ultrahigh-strength cement-based grouting material as claimed in claim 1, wherein the initial fluidity of the high-fluidity ultrahigh-strength cement-based grouting material is not less than 360mm, and the 30min fluidity retention value is not less than 330 mm.
8. The high-fluidity ultrahigh-strength cement-based grouting material according to claim 1, wherein the high-fluidity ultrahigh-strength cement-based grouting material has a freeze-thaw resistance cycle of more than 1000 times and an RCM chloride ion migration diffusion coefficient<10-13。
9. A method for preparing a high-fluidity ultrahigh-strength cement-based grouting material according to any one of claims 1 to 8, comprising the steps of:
and (3) mixing: wetting a cylinder of a stirrer, adding the cement, quartz sand, a coagulant and an expanding agent according to the formula amount, and stirring for 2-3min to obtain a mixture;
and (3) preparing a finished product: and adding the water reducing agent and the water in the formula amount into the mixture, and continuously stirring for 2-3 minutes to obtain the high-fluidity ultrahigh-strength cement-based grouting material.
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| CN114031349A (en) * | 2021-11-30 | 2022-02-11 | 江苏博拓新型建筑材料股份有限公司 | Wind power high-strength grouting material and preparation method thereof |
| CN114044663A (en) * | 2021-11-24 | 2022-02-15 | 燕山大学 | Low-shrinkage early-strength sleeve grouting material and preparation method and application thereof |
| CN114751694A (en) * | 2022-04-12 | 2022-07-15 | 阳江海上风电实验室 | Cement grouting material suitable for marine environment and preparation method thereof |
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| 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 |
| CN111807770A (en) * | 2020-07-13 | 2020-10-23 | 山东华迪建筑科技有限公司 | Ecological cement high-strength grouting material and preparation method thereof |
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| 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 |
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| CN114044663A (en) * | 2021-11-24 | 2022-02-15 | 燕山大学 | Low-shrinkage early-strength sleeve grouting material and preparation method and application thereof |
| CN114044663B (en) * | 2021-11-24 | 2022-11-15 | 燕山大学 | Low-shrinkage early-strength sleeve grouting material and preparation method and application thereof |
| CN114031349A (en) * | 2021-11-30 | 2022-02-11 | 江苏博拓新型建筑材料股份有限公司 | Wind power high-strength grouting material and preparation method thereof |
| CN114751694A (en) * | 2022-04-12 | 2022-07-15 | 阳江海上风电实验室 | Cement grouting material suitable for marine environment and preparation method thereof |
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