CN113998947A - Acrylic modified mortar for repairing subway segment cracks and preparation method thereof - Google Patents
Acrylic modified mortar for repairing subway segment cracks and preparation method thereof Download PDFInfo
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- CN113998947A CN113998947A CN202111269758.1A CN202111269758A CN113998947A CN 113998947 A CN113998947 A CN 113998947A CN 202111269758 A CN202111269758 A CN 202111269758A CN 113998947 A CN113998947 A CN 113998947A
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- modified mortar
- acrylic
- repairing
- cement
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- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000000839 emulsion Substances 0.000 claims abstract description 32
- 239000000203 mixture Substances 0.000 claims abstract description 20
- 239000004568 cement Substances 0.000 claims abstract description 17
- 239000006004 Quartz sand Substances 0.000 claims abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 15
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 15
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 8
- 238000005303 weighing Methods 0.000 claims abstract description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 18
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 10
- 239000011398 Portland cement Substances 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 2
- 239000003513 alkali Substances 0.000 claims description 2
- 238000010998 test method Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 239000011083 cement mortar Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000006467 substitution reaction 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
- C04B28/02—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
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00293—Materials impermeable to liquids
-
- 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
- C04B2111/2092—Resistance against biological degradation
-
- 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
-
- 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
- C04B2111/72—Repairing or restoring existing buildings or building materials
-
- 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
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
-
- 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
Landscapes
- 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 belongs to the technical field of subway segment crack repair, and discloses acrylic modified mortar for repairing a subway segment crack and a preparation method thereof, wherein the acrylic modified mortar is prepared from the following raw materials in parts by mass: 780-820 parts of cement; 15.6-16.4 parts of silica fume; 1560-1804 parts of quartz sand; 23.4-28.5 parts of an auxiliary agent; 156 parts of acrylic emulsion; 124-141 parts of water; specifically, when the milk-acrylic modified mortar is prepared, the preparation method comprises the following steps: s1, weighing the following raw materials in parts by weight: 780-820 parts of cement; 15.6-16.4 parts of silica fume; 1560-1804 parts of quartz sand; 23.4-28.5 parts of an auxiliary agent; 156 parts of acrylic emulsion; 124-141 parts of water; s2, uniformly mixing the cement, the silica fume and the quartz sand weighed in the step S1 to obtain a dry material mixture; s3, sequentially adding the auxiliary agent, the acrylic emulsion and the water weighed in the step S1 into the dry material mixture, and mechanically stirring until the mixture is uniformly mixed to obtain the acrylic emulsion modified mortar; in conclusion, the repair material with better functionality and higher cost performance is obtained.
Description
Technical Field
The invention belongs to the technical field of subway segment crack repair, and particularly relates to acrylic modified mortar for repairing a subway segment crack and a preparation method thereof.
Background
With the rapid development of urban underground tunnel construction in China, rail transit is becoming a main transport tool more and more; along with the increase of the operation age, some subway shield tunnel structures gradually expose some tunnel settlement, segment cracks, tunnel water leakage and other problems, thereby influencing the normal operation of the shield tunnel.
The traditional repairing method for repairing the subway shield tunnel segment generally uses epoxy resin mortar or resin concrete, but the resin mortar or the resin concrete is higher in cost and is not suitable for wider repairing work, so that the repairing material with better functionality and higher cost performance is provided in the application.
Disclosure of Invention
In view of the above, in order to solve the problems in the background art, the present invention aims to provide a propylene-modified mortar for repairing a subway segment crack and a preparation method thereof.
In order to achieve the purpose, the invention provides the following technical scheme:
the acrylic modified mortar for repairing the cracks of the subway segments is prepared from the following raw materials in parts by mass:
780-820 parts of cement;
15.6-16.4 parts of silica fume;
1560-1804 parts of quartz sand;
23.4-28.5 parts of an auxiliary agent;
156 parts of acrylic emulsion;
124-141 parts of water.
Preferably, the cement is one of portland cement and ordinary portland cement, and the strength of the cement is 52.5MPa to 62.5 MPa.
Preferably, the solid content of the acrylic emulsion is 5-70%.
Preferably, the auxiliary agent comprises: 0-3.9 parts of a water reducing agent; 23.4-24.6 parts of an expanding agent.
Preferably, the water reducing agent is a polycarboxylic acid water reducing agent, and the solid content of the water reducing agent is 5-60%.
Preferably, in the water reducing agent:
the solid content is 17.7-19.9%;
the content of chloride ions is less than or equal to 0.20 percent;
the total alkali amount is less than or equal to 2.0;
the density is 1.02-1.06 g/cm at the temperature below 20 DEG C3；
The pH value is 4.5-7.5 at a temperature below 20 ℃.
A preparation method of acrylic modified mortar for repairing subway segment cracks comprises the following steps:
s1, weighing the following raw materials in parts by weight: 780-820 parts of cement; 15.6-16.4 parts of silica fume; 1560-1804 parts of quartz sand; 23.4-28.5 parts of an auxiliary agent; 156 parts of acrylic emulsion; 124-141 parts of water;
s2, uniformly mixing the cement, the silica fume and the quartz sand weighed in the step S1 to obtain a dry material mixture;
and S3, sequentially adding the auxiliary agent, the acrylic emulsion and the water weighed in the step S1 into the dry material mixture, and mechanically stirring until the mixture is uniformly mixed to obtain the required acrylic emulsion modified mortar.
Preferably, the auxiliary agent comprises 0-3.9 parts of water reducing agent and 23.4-24.6 parts of expanding agent, and the step S3 comprises the following steps:
s31, sequentially adding 23.4-24.6 parts of an expanding agent into the dry material mixture, and uniformly mixing;
and S32, sequentially adding a water reducing agent, acrylic emulsion and water into the mixed material obtained in the step S31, and mechanically stirring until the materials are uniformly mixed to obtain the required acrylic emulsion modified mortar.
Compared with the prior art, the invention has the following beneficial effects:
the third-stage modified mortar has short setting time, high early strength, especially high bonding rupture strength, stable later strength development, excellent flexibility and volume stability and good compatibility with cement-based materials, and is suitable for being used in underground water environment.
The material has good fluidity and water retention in the aspect of construction performance, simple and convenient construction procedures, wide material sources and low cost, is suitable for different engineering construction requirements, and can be applied to waterproof, anticorrosion, seepage-proofing, moisture-proofing and seepage-repairing engineering of tunnel segments, subway stations and other parts. In addition, when the acrylic emulsion modified mortar is used, the components are added according to the proportion, and a proper amount of water is added and then the mixture is uniformly stirred, so that the construction can be carried out, and the operation is simple.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The acrylic modified mortar for repairing subway segment cracks comprises the following raw materials:
780 parts of Portland cement with the strength of 52.5MPa to 62.5 MPa;
15.6 parts of silica fume;
1560 parts of quartz sand;
23.4 parts of an expanding agent;
156 parts of acrylic emulsion with the solid content of 5-70 percent;
124.8 parts of water.
The preparation method of the acrylic emulsion modified mortar comprises the following steps:
s1, weighing raw materials according to the mass parts of the raw materials;
s2, uniformly mixing the cement, the silica fume and the quartz sand weighed in the step S1 to obtain a dry material mixture;
and S3, sequentially adding a water reducing agent, acrylic emulsion and water into the dry material mixture, and mechanically stirring until the mixture is uniformly mixed to obtain the required acrylic emulsion modified mortar.
For the prepared acrylic modified mortar, the specifications of JGJ 70-2009 test method for basic performance of building mortar, DL/T5126-2001 test procedure for polymer modified cement mortar and the like are taken as test bases to measure various performances.
The fluidity, setting time, compressive strength and adhesive flexural strength measured according to the above specifications were 100mm, 204min, 36.65MPa and 6.32MPa, respectively.
Example 2
The acrylic modified mortar for repairing subway segment cracks comprises the following raw materials:
780 parts of Portland cement with the strength of 52.5MPa to 62.5 MPa;
15.6 parts of silica fume;
1716 parts of quartz sand;
23.4 parts of an expanding agent;
156 parts of acrylic emulsion with the solid content of 5-70 percent;
140.4 parts of water.
The preparation method of the acrylic emulsion modified mortar comprises the following steps:
s1, weighing raw materials according to the mass parts of the raw materials;
s2, uniformly mixing the cement, the silica fume and the quartz sand weighed in the step S1 to obtain a dry material mixture;
and S3, sequentially adding a water reducing agent, acrylic emulsion and water into the dry material mixture, and mechanically stirring until the mixture is uniformly mixed to obtain the required acrylic emulsion modified mortar.
For the prepared acrylic modified mortar, the specifications of JGJ 70-2009 test method for basic performance of building mortar, DL/T5126-2001 test procedure for polymer modified cement mortar and the like are taken as test bases to measure various performances.
The fluidity, setting time, compressive strength and adhesive flexural strength measured according to the above specifications were 100mm, 236min, 35.25MPa and 6.54MPa, respectively.
Example 3
The acrylic modified mortar for repairing subway segment cracks comprises the following raw materials:
780 parts of ordinary portland cement with the strength of 52.5-62.5 MPa;
15.6 parts of silica fume;
1560 parts of quartz sand;
3.9 parts of polycarboxylic acid water reducing agent with the solid content of 17.7-19.9%;
23.4 parts of an expanding agent;
156 parts of acrylic emulsion with the solid content of 5-70 percent;
124.8 parts of water.
The preparation method of the acrylic emulsion modified mortar comprises the following steps:
s1, weighing raw materials according to the mass parts of the raw materials;
s2, uniformly mixing the cement, the silica fume and the quartz sand weighed in the step S1 to obtain a dry material mixture;
s3, adding an expanding agent into the dry material mixture, and uniformly mixing;
and S4, sequentially adding a water reducing agent, acrylic emulsion and water into the mixed material obtained in the step S3, and mechanically stirring until the materials are uniformly mixed to obtain the required acrylic emulsion modified mortar.
For the prepared acrylic modified mortar, the specifications of JGJ 70-2009 test method for basic performance of building mortar, DL/T5126-2001 test procedure for polymer modified cement mortar and the like are taken as test bases to measure various performances.
The fluidity, setting time, compressive strength and adhesive flexural strength measured according to the above specifications were 105cm, 252min, 43.86MPa and 6.66MPa, respectively.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The acrylic modified mortar for repairing the cracks of the subway segments is characterized by comprising the following raw materials in parts by mass:
780-820 parts of cement;
15.6-16.4 parts of silica fume;
1560-1804 parts of quartz sand;
23.4-28.5 parts of an auxiliary agent;
156 parts of acrylic emulsion;
124-141 parts of water.
2. The acrylic modified mortar for repairing cracks of subway segments as claimed in claim 1, wherein said acrylic modified mortar comprises: the cement is one of Portland cement and ordinary Portland cement, and the strength of the cement is 52.5MPa to 62.5 MPa.
3. The acrylic modified mortar for repairing cracks of subway segments as claimed in claim 1, wherein said acrylic modified mortar comprises: the solid content of the acrylic emulsion is 5-70%.
4. The acrylic modified mortar for repairing subway segment cracks as claimed in claim 1, wherein said auxiliary agent comprises:
0-3.9 parts of a water reducing agent;
23.4-24.6 parts of an expanding agent.
5. The acrylic modified mortar for repairing cracks of subway segments as claimed in claim 4, wherein said acrylic modified mortar comprises the following components: the water reducing agent is a polycarboxylic acid water reducing agent, and the solid content of the water reducing agent is 5-60%.
6. The propylene-emulsion modified mortar for repairing subway segment cracks as claimed in claim 5, wherein in the water reducing agent:
the solid content is 17.7-19.9%;
the content of chloride ions is less than or equal to 0.20 percent;
the total alkali amount is less than or equal to 2.0;
the density is 1.02-1.06 g/cm at the temperature below 20 DEG C3；
The pH value is 4.5-7.5 at a temperature below 20 ℃.
7. A preparation method of acrylic modified mortar for repairing subway segment cracks is characterized by comprising the following steps:
s1, weighing the following raw materials in parts by weight: 780-820 parts of cement; 15.6-16.4 parts of silica fume; 1560-1804 parts of quartz sand; 23.4-28.5 parts of an auxiliary agent; 156 parts of acrylic emulsion; 124-141 parts of water;
s2, uniformly mixing the cement, the silica fume and the quartz sand weighed in the step S1 to obtain a dry material mixture;
and S3, sequentially adding the auxiliary agent, the acrylic emulsion and the water weighed in the step S1 into the dry material mixture, and mechanically stirring until the mixture is uniformly mixed to obtain the required acrylic emulsion modified mortar.
8. The preparation method of the acrylic modified mortar for repairing cracks on subway segments as claimed in claim 7, wherein said assistant comprises 0-3.9 parts of water reducing agent and 23.4-24.6 parts of expanding agent, and in said step S3 comprises:
s31, sequentially adding 23.4-24.6 parts of an expanding agent into the dry material mixture, and uniformly mixing;
and S32, sequentially adding a water reducing agent, acrylic emulsion and water into the mixed material obtained in the step S31, and mechanically stirring until the materials are uniformly mixed to obtain the required acrylic emulsion modified mortar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111269758.1A CN113998947A (en) | 2021-10-29 | 2021-10-29 | Acrylic modified mortar for repairing subway segment cracks and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111269758.1A CN113998947A (en) | 2021-10-29 | 2021-10-29 | Acrylic modified mortar for repairing subway segment cracks and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113998947A true CN113998947A (en) | 2022-02-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111269758.1A Withdrawn CN113998947A (en) | 2021-10-29 | 2021-10-29 | Acrylic modified mortar for repairing subway segment cracks and preparation method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN113998947A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115521105A (en) * | 2022-02-14 | 2022-12-27 | 扬州工业职业技术学院 | Emulsion-modified mortar for repairing subway segment cracks and preparation method thereof |
-
2021
- 2021-10-29 CN CN202111269758.1A patent/CN113998947A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115521105A (en) * | 2022-02-14 | 2022-12-27 | 扬州工业职业技术学院 | Emulsion-modified mortar for repairing subway segment cracks and preparation method thereof |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20220201 |
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| WW01 | Invention patent application withdrawn after publication |