CN113548855A - Cement-based grouting material and preparation method thereof - Google Patents
Cement-based grouting material and preparation method thereof Download PDFInfo
- Publication number
- CN113548855A CN113548855A CN202110865823.0A CN202110865823A CN113548855A CN 113548855 A CN113548855 A CN 113548855A CN 202110865823 A CN202110865823 A CN 202110865823A CN 113548855 A CN113548855 A CN 113548855A
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- China
- Prior art keywords
- grouting material
- cement
- agent
- portions
- based grouting
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- 239000000463 material Substances 0.000 title claims abstract description 57
- 239000004568 cement Substances 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 30
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000006004 Quartz sand Substances 0.000 claims abstract description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000004033 plastic Substances 0.000 claims abstract description 12
- 239000011398 Portland cement Substances 0.000 claims abstract description 9
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 9
- 239000003381 stabilizer Substances 0.000 claims abstract description 9
- 239000000203 mixture Substances 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 9
- 230000008961 swelling Effects 0.000 claims description 5
- 229920001732 Lignosulfonate Polymers 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 150000004645 aluminates Chemical class 0.000 claims description 3
- -1 azo compound Chemical class 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 150000002832 nitroso derivatives Chemical group 0.000 claims description 3
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 abstract description 9
- 238000010276 construction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland 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 provides a cement-based grouting material and a preparation method thereof, wherein the cement-based grouting material comprises the following components in parts by weight: 400 portions of 52.5-grade portland cement, 640 portions of quartz sand, 16 to 30 portions of expanding agent, 1.4 to 2.6 portions of water reducing agent, 0.6 to 1.2 portions of defoaming agent, 0.4 to 0.75 portion of stabilizing agent and 0.2 to 0.5 portion of plastic expanding agent. The invention reduces the cost of the cement-based grouting material for engineering reinforcement and reconstruction, and simultaneously obviously improves the bonding property between the grouting material and the old concrete, thereby providing the cement-based grouting material with high bonding property for widening the cross sections of beams and columns, which has excellent flowing property, strength, stability and the like.
Description
Technical Field
The invention relates to a high-bonding-performance grouting material for widening cross sections of beams and columns and a preparation method thereof, in particular to a high-bonding-performance grouting material suitable for widening cross sections of beams and columns in a concrete structure.
Background
The structural reinforcement or transformation engineering adopting the beam and column section expansion method usually requires good reinforcement effect, quick construction period and easy construction, the reinforcement material has good stability and low long-term shrinkage rate, and meanwhile, the reliable bonding between the reinforcement material and the old concrete is ensured. The requirements on the grouting material are the indexes of the grouting material such as fluidity, expansion rate, strength, bleeding rate and the like. If the flowing performance is not necessary, the filling cannot be carried out in a narrow space, and the full filling effect cannot be achieved. In order to obtain a full filling effect after the grouting material is hardened, the grouting material must have the characteristics of micro-expansion and no shrinkage, and the slurry itself should be very stable. In structural reinforcement or reconstruction projects, generally, high early strength is required so as to be put into use as early as possible, namely, the final setting time is expected to be as short as possible, but the initial setting time is not too short, and the construction operation and the pouring quality are easily influenced in case of too short time.
At present, a common Portland cement-sulphoaluminate cement binary cementing system is generally adopted as a grouting material for engineering reconstruction and reinforcement at home and abroad to achieve the purpose of high early strength, but the use of sulphoaluminate cement can cause the problems of reduced fluidity of the grouting material, too fast initial setting time and final setting time and the like. Therefore, the existing grouting material product also contains mineral admixtures such as mineral powder and the like, and various high-performance additives such as retarder and the like, which undoubtedly causes great increase of the cost. The use of such special grouting materials is certainly uneconomical for conventional reinforcement engineering with widening of the beam and column sections. Meanwhile, the bonding property between the current main grouting material products and the old concrete is mostly low, so that the mechanical property of the beam and the column after the section is enlarged by using the grouting material cannot be accurately mastered.
Disclosure of Invention
The invention overcomes the defects in the prior art, and aims to reduce the cost of the cement-based grouting material for engineering reinforcement and reconstruction, and simultaneously remarkably improve the bonding property between the grouting material and the old concrete, thereby providing the cement-based grouting material with high bonding property for widening the cross sections of beams and columns, which has excellent flowing property, strength, stability and the like.
According to one aspect of the present invention, there is provided a cement-based grouting material, comprising, in parts by weight: 400 portions of 52.5-grade portland cement, 640 portions of quartz sand, 16 to 30 portions of expanding agent, 1.4 to 2.6 portions of water reducing agent, 0.6 to 1.2 portions of defoaming agent, 0.4 to 0.75 portion of stabilizing agent and 0.2 to 0.5 portion of plastic expanding agent.
In some embodiments of the invention, the quartz sand is 20-50 mesh quartz sand mixed with 40-80 mesh quartz sand at a ratio of 1: 1.15.
In some embodiments of the invention, the swelling agent is a sulfoaluminate swelling agent, an aluminate swelling agent, or a mixture thereof.
In some embodiments of the invention, the plastic swelling agent is a nitroso compound, an azo compound, a sulfonyl hydrazide compound, or a mixture thereof.
In some embodiments of the invention, the water reducer is a polycarboxylic acid water reducer, a lignosulfonate water reducer, or a mixture thereof.
According to another aspect of the present invention, there is also provided a method for preparing a cement-based grouting material, comprising:
placing the expanding agent, the water reducing agent, the defoaming agent, the stabilizing agent and the plastic expanding agent into a forced concrete mixer and stirring for 2 minutes;
adding quartz sand and portland cement at a constant speed and stirring for 3 minutes;
stirring at constant speed for 5 minutes.
Compared with the prior art, the invention has the beneficial effects that:
(1) the bonding strength is high: the cement-based grouting material for widening the cross sections of the beams and the columns, provided by the invention, has the tensile bonding strength of more than 1.75MPa, can ensure the reliable bonding between the grouting material and the old concrete, and can ensure the mechanical properties of the reinforced beams and columns;
(2) slow setting and good fluidity: the initial fluidity of the cement-based grouting material provided by the invention can reach more than 290mm, part of the mixture ratio can reach 330mm, and the fluidity decrement is 10-20mm in half an hour, so that the construction quality of the grouting material can be effectively ensured;
(3) high strength and low cost: the cement-based grouting material provided by the invention has the advantages that the 1d strength can reach 23.5MPa, the 28d strength can reach more than 73.4MPa, the components are simple, and the cost is low.
Detailed Description
Example embodiments will now be described more fully. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, materials, devices, etc. In other instances, well-known technical solutions have not been shown or described in detail to avoid obscuring aspects of the present disclosure.
The terms "a," "an," "the," "said," and "at least one" are used to indicate the presence of one or more elements/components/parts/etc.; the terms "comprising," "having," and "providing" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.
The cement-based grouting material provided by the invention is used for high-bonding-performance grouting material for widening the cross sections of beams and columns, and comprises the following components in parts by weight: 400 portions of 52.5-grade ordinary portland cement, 640 portions of quartz sand, 16 to 30 portions of expanding agent, 1.4 to 2.6 portions of water reducing agent, 0.6 to 12 portions of defoaming agent, 0.4 to 0.75 portion of stabilizing agent and 0.2 to 0.5 portion of plastic expanding agent.
Specifically, the grouting material is prepared by mixing 20-50 meshes of quartz sand and 40-80 meshes of quartz sand according to a ratio of 1: 1.15. The expanding agent used in the grouting material is sulphoaluminate expanding agent, aluminate expanding agent or the mixture thereof. The plastic expanding agent used by the grouting material is a nitroso compound, an azo compound, a sulfonyl hydrazide compound or a mixture thereof.
Specifically, the water reducing agent used by the grouting material is a polycarboxylic acid water reducing agent, a lignosulfonate water reducing agent or a mixture thereof.
Specifically, the preparation method of the cement-based grouting material comprises the following steps: placing the expanding agent, the water reducing agent, the defoaming agent, the stabilizing agent and the plastic expanding agent into a forced concrete mixer and stirring for 2 minutes; adding quartz sand and portland cement at a constant speed and stirring for 3 minutes; stirring at constant speed for 5 minutes. Finally, the mixture can be taken out and bagged.
The cement-based grouting material with high bonding performance for reinforcing the sections of the beams and the columns, provided by the invention, has the main performance indexes through various performance tests as follows:
(1) fluidity: the initial fluidity is 290mm, and the fluidity is more than or equal to 270mm in 30 min;
(2) strength: 23.5MPa for 1d strength, 47.8MPa for 3d strength and 73.4MPa for 28d strength;
(3) expansion ratio: 1d expansion rate is 0.10%;
(4) bonding strength: tensile bond strength 1.75MPa.
The following provides examples of the invention:
the first embodiment is as follows: high-adhesion grouting material for widening cross sections of beams and columns
400 parts of 52.5-grade ordinary portland cement, 500 parts of quartz sand, 20 parts of an expanding agent, 1.6 parts of a water reducing agent, 0.8 part of a defoaming agent, 0.4 part of a stabilizer, 0.2 part of a plastic expanding agent and 130 parts of tap water.
The main properties of the obtained grouting material are as follows:
example two: high-adhesion grouting material for widening cross sections of beams and columns
450 parts of 52.5-grade ordinary portland cement, 600 parts of quartz sand, 18 parts of an expanding agent, 2.0 parts of a water reducing agent, 1.0 part of a defoaming agent, 0.6 part of a stabilizer, 0.3 part of a plastic expanding agent and 142 parts of tap water.
The main properties of the obtained grouting material are as follows:
the foregoing is merely an exemplary description of various embodiments of the invention and is not intended to be limiting thereof.
Compared with the prior art, the invention has the beneficial effects that:
(1) the bonding strength is high: the cement-based grouting material for widening the cross sections of the beams and the columns, provided by the invention, has the tensile bonding strength of more than 1.75MPa, can ensure the reliable bonding between the grouting material and the old concrete, and can ensure the mechanical properties of the reinforced beams and columns;
(2) slow setting and good fluidity: the initial fluidity of the cement-based grouting material provided by the invention can reach more than 290mm, part of the mixture ratio can reach 330mm, and the fluidity decrement is 10-20mm in half an hour, so that the construction quality of the grouting material can be effectively ensured;
(3) high strength and low cost: the cement-based grouting material provided by the invention has the advantages that the 1d strength can reach 23.5MPa, the 28d strength can reach more than 73.4MPa, the components are simple, and the cost is low.
In the description herein, references to the description of "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," etc., indicate that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (6)
1. The cement-based grouting material is characterized by comprising the following components in parts by weight: 400 portions of 52.5-grade portland cement, 640 portions of quartz sand, 16 to 30 portions of expanding agent, 1.4 to 2.6 portions of water reducing agent, 0.6 to 1.2 portions of defoaming agent, 0.4 to 0.75 portion of stabilizing agent and 0.2 to 0.5 portion of plastic expanding agent.
2. The cement-based grouting material as claimed in claim 1, wherein the quartz sand is a mixture of 20-50 mesh quartz sand and 40-80 mesh quartz sand at a ratio of 1: 1.15.
3. The cement-based grouting material of claim 1, wherein the expanding agent is a sulfoaluminate expanding agent, an aluminate expanding agent, or a mixture thereof.
4. The cement-based grouting material of claim 1, wherein the plastic swelling agent is a nitroso compound, an azo compound, a sulfonyl hydrazide compound, or a mixture thereof.
5. The cement-based grouting material of claim 1, wherein the water reducing agent is a polycarboxylic acid water reducing agent, a lignosulfonate water reducing agent or a mixture thereof.
6. The preparation method of the cement-based grouting material is characterized by comprising the following steps:
placing the expanding agent, the water reducing agent, the defoaming agent, the stabilizing agent and the plastic expanding agent into a forced concrete mixer and stirring for 2 minutes;
adding quartz sand and portland cement at a constant speed and stirring for 3 minutes;
stirring at constant speed for 5 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110865823.0A CN113548855A (en) | 2021-07-29 | 2021-07-29 | Cement-based grouting material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110865823.0A CN113548855A (en) | 2021-07-29 | 2021-07-29 | Cement-based grouting material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113548855A true CN113548855A (en) | 2021-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110865823.0A Pending CN113548855A (en) | 2021-07-29 | 2021-07-29 | Cement-based grouting material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113548855A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN115745523A (en) * | 2022-12-05 | 2023-03-07 | 江苏超力建材科技有限公司 | Preparation method and application of floating type foundation prestressed grouting material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109592950A (en) * | 2018-12-25 | 2019-04-09 | 北京纽维逊建筑工程技术有限公司 | Heat resistant type strength cement-based grouting material and preparation method thereof |
| CN112174617A (en) * | 2020-09-18 | 2021-01-05 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Sleeve grouting material for connecting reinforcing steel bars and preparation method and application thereof |
-
2021
- 2021-07-29 CN CN202110865823.0A patent/CN113548855A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109592950A (en) * | 2018-12-25 | 2019-04-09 | 北京纽维逊建筑工程技术有限公司 | Heat resistant type strength cement-based grouting material and preparation method thereof |
| CN112174617A (en) * | 2020-09-18 | 2021-01-05 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Sleeve grouting material for connecting reinforcing steel bars and preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 雷超等: "加固用水泥基灌浆料拉伸黏结强度试验研究" * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN115745523A (en) * | 2022-12-05 | 2023-03-07 | 江苏超力建材科技有限公司 | Preparation method and application of floating type foundation prestressed grouting material |
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Application publication date: 20211026 |