CN114873972A - Rapid repairing agent for shield segment - Google Patents
Rapid repairing agent for shield segment Download PDFInfo
- Publication number
- CN114873972A CN114873972A CN202210595810.0A CN202210595810A CN114873972A CN 114873972 A CN114873972 A CN 114873972A CN 202210595810 A CN202210595810 A CN 202210595810A CN 114873972 A CN114873972 A CN 114873972A
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- CN
- China
- Prior art keywords
- parts
- component
- agent
- shield segment
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- C04B2111/20—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
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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 relates to the technical field of repair materials and discloses a shield segment quick repair agent which comprises a component A and a component B, wherein the component A is polymer emulsion, the component B is early-strength, high-strength, anti-cracking and anti-permeability premix, the mass ratio of the component A to the component B is 1: 6, and the component B comprises the following components in percentage by mass: special cement
Fractional mixing quartz sand
Superfine powdered ore
Silicon ash
Portion, can be used againDispersed latex powder
Special fiber
Part(s) of water-retaining thickening agent
Water reducing agent
Partial and nano anti-permeability agent
Description
Technical Field
The invention relates to the technical field of repair materials, in particular to a shield segment rapid repair agent.
Background
Because the important effect of shield segment in subway construction, the demand is more and more high, however, the damage of shield segment is difficult to avoid, if collide with in hoist and mount or the horizontal transport process, shield attitude control is improper in the shield tunnelling process, and the assembly in-process violates operating rules etc. and all can cause the segment damage. The shield segments on the market are various in types and have different performances, and no corresponding detection standard is used as a guide, so that the development of the shield segment repair agent is urgent.
In order to recover a series of using functions of the damaged shield segment, the shield segment needs to be repaired. At present, common cement slurry is adopted as a repairing material in a common repairing method, but the common cement slurry has the common characteristics of large brittleness and insufficient toughness, which are mainly reflected in high compressive strength, low tensile strength and bonding strength, high elastic modulus and poor deformability, and if the common cement slurry is used for repairing a shield segment, the common cement slurry easily causes the quality problems of interface bonding infirm, cracking, concrete damage again and the like, and is limited to a certain extent in use, and the conventional repairing material has the following problems: the adhesive force between the concrete shield segment and the concrete shield segment is insufficient, so that certain potential safety hazards exist; the early strength is slowly exerted, so that the construction progress is influenced; the water retention is poor, and hollowing and cracking phenomena are easy to occur during thin layer repair; the self-prepared raw materials have various varieties, are easy to make mistakes and are not beneficial to management.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a quick repairing agent for a shield segment, which solves the problems of insufficient bonding force with a concrete shield segment and certain potential safety hazard.
(II) technical scheme
In order to solve the problems in the prior art, the invention provides the following technical scheme: a quick repairing agent for a shield segment comprises a component A and a component B, wherein the component A is a silicone-acrylic emulsion, the component B is an early-strength high-strength anti-cracking anti-permeability premix, and the mass ratio of the component A to the component B is 1: 6;
the component B comprises the following components in percentage by mass: special cement
Quartz sand
Superfine mineral powder
Silica fume
Redispersible latex powder
Special fiber
Water-retaining thickening agent
Water reducing agent
Nano anti-permeability agent
Preferably, the component A is silicone-acrylate emulsion with the Tg temperature of-19 ℃.
Preferably, the quartz sand is quartz machine-made sand with fineness modulus less than 2.2, the superfine mineral powder is ground granulated blast furnace slag micro powder with grade of more than or equal to S95, and the water-retaining thickener is hydroxypropyl methyl cellulose.
Preferably, the special fiber is prepared from the special fiber and the mass of the component B
Preferably, the mass fraction of the component B is specifically as follows: 330 parts of special cement, 520 parts of quartz sand, 100 parts of superfine mineral powder, 25 parts of silica fume, 15 parts of redispersible latex powder, 6 parts of special fiber, 3 parts of water retention thickener, 1.2 parts of alkali water agent and 1.5 parts of nano anti-permeability agent.
Preferably, the mass fraction of the component B is specifically as follows: 300 parts of special cement, 550 parts of quartz sand, 80 parts of superfine mineral powder, 45 parts of silica fume, 10 parts of redispersible latex powder, 8 parts of special fiber, 2 parts of water retention thickener, 1.8 parts of alkaline water agent and 1.5 parts of nano anti-permeability agent.
Preferably, the mass fraction of the component B is specifically as follows: 350 parts of special cement, 500 parts of quartz sand, 100 parts of superfine mineral powder, 30 parts of silica fume, 20 parts of redispersible latex powder, 10 parts of special fiber, 2 parts of water retention thickener, 1.2 parts of alkali water agent and 2 parts of nano anti-permeability agent.
Preferably, the mass fraction of the component B is specifically as follows: 280 parts of special cement, 500 parts of quartz sand, 150 parts of superfine mineral powder, 50 parts of silica fume, 10 parts of redispersible latex powder, 6 parts of special fiber, 2 parts of water retention thickener, 1.5 parts of alkaline water agent and 1 part of nano anti-permeability agent.
(III) advantageous effects
Compared with the prior art, the invention provides a quick repairing agent for shield segments, which has the following beneficial effects:
the invention has the beneficial effects that: the invention relates to a quick repairing agent for shield segments, which is a cement-based composite material modified by a silicone-acrylic emulsion, not only maintains the advantages of easy availability of inorganic materials, good durability, environmental friendliness and relatively low price, but also exerts the advantage of high flexibility of a high polymer material and is specially used for repairing the defects of concrete shield segments.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
The present invention will be further described with reference to examples.
A quick repairing agent for a shield segment comprises a component A and a component B, wherein the component A is a silicone-acrylic emulsion, the component B is an early-strength high-strength anti-cracking anti-permeability premix, and the mass ratio of the component A to the component B is 1: 6, wherein the component B comprises the following components in percentage by mass: special cement
Quartz sand
Superfine mineral powder
Silica fume
Redispersible latex powder
Special fiber
Water-retaining thickening agent
Water reducing agent
Nano anti-permeability agent
The special cement is 42.5-grade rapid hardening portland cement, the quartz sand is quartz machine-made sand with the fineness modulus of less than 2.2, the superfine mineral powder is blast furnace slag micro powder which is ground and granulated by more than or equal to S95 grade, the redispersible latex powder is imported German wacker 5044N, the special fiber is special fiber special for ECC high-ductility concrete, the water retention thickening agent is hydroxypropyl methyl cellulose (HPMC), the water reducing agent is polycarboxylate water reducing agent, and the nano anti-permeability agent is nano inorganic anti-cracking waterproof agent.
The invention selects silicone-acrylic emulsion as component A, the silicone-acrylic emulsion is prepared by adding appropriate auxiliary agent into organosilicon monomer containing unsaturated bond and acrylic monomer, and polymerizing by core-shell coating polymerization process. Combines the high temperature resistance, weather resistance, chemical resistance, hydrophobicity, low surface energy and difficult pollution of organosilicon and the high color retention, flexibility and adhesiveness of acrylic resin. Is an environment-friendly emulsion for buildings with high weather resistance, high water resistance and pollution resistance.
The quick repairing agent for the shield segment can be used after being uniformly stirred according to the weight ratio of A to B which is 1 to 6 when in use, and is specially used for quickly repairing the defect of the shield segment of the concrete shield.
The polymer is solidified to form filiform film layers distributed in the whole cement hardened body, the filiform polymer film layers cross the defects and microcracks in the cement hardened body, and absorb the fracture work required by the expansion of the microcracks due to higher cohesion and higher tensile strength and deformability, thereby effectively delaying the expansion rate of the microcracks. The cured polymer also plugs the capillary pores in the cement hardened body, and the adhesion of the polymer also enhances the bonding of the cement paste to the aggregate interface. Therefore, the polymer is beneficial to improving the compactness and the micropore state of the cement-based product, thereby improving the impermeability and the medium erosion resistance of the cement-based product.
The rapid repair agent for the shield segment has the characteristics of early strength and rapid hardening, is favorable for accelerating the construction progress, does not have the defect of inherent strength collapse of other early strength and rapid hardening type cementing materials, and can continuously increase the strength along with the increase of the age.
The addition of the anti-saponification re-dispersible latex powder and the high polymer material contained in the silicone-acrylic emulsion ensures that the hardened repairing agent slurry pore structure forms a continuous closed film and has hydrophobicity and single air permeability, water vapor can be freely discharged, the corrosion of a water medium to a repairing body can be resisted, the bonding force with old concrete is enhanced in a multiplied manner, the hollowing phenomenon cannot occur, and the anti-corrosion capability and the durability of the concrete are improved.
The water-retaining thickening agent (HPMC) has good water-retaining property, can ensure that the slurry is not dehydrated too fast to influence the hydration hardening of a cement-based cementing material when the thin layer repair of the concrete shield segment is carried out, ensures the repair quality, and simultaneously improves the slurry construction performance of the repairing agent.
The special fiber is doped just like a 'soft reinforcing steel bar' is arranged in a quick repair agent hardening body of the shield segment, so that the toughness and the crack resistance of the repair body are improved, and the special fiber is a core material of ECC high-ductility concrete.
The silicon ash and the slag micro powder have higher pozzolanic property, actually participate in the hydration hardening process of the main gelled material in the repairing agent, particularly, the hydration product of the silicon ash can also permeate into capillary pores of a concrete shield segment of a base layer of the repairing agent, so that the pore structure of the hydration hardened body of the repairing agent is facilitated, and the interactive connection between the hydration hardened body of the repairing agent and the base layer is facilitated.
The first embodiment is as follows:
a quick repairing agent for shield segments is composed of polymer emulsion (component A) and premix (component B), and can be used after being uniformly stirred according to the weight ratio of 1: 6 of component A to component B when in use, and is specially used for quickly repairing the defects of the shield segments of concrete shields. The component A is silicone-acrylate emulsion with the Tg temperature of 35 ℃; the weight parts of the component B are shown in the table I.
Watch 1
The implementation effect is shown in the fifth table.
The second embodiment:
a quick repairing agent for shield segments is composed of polymer emulsion (component A) and premix (component B), and can be used after being uniformly stirred according to the weight ratio of 1: 6 of component A to component B when in use, and is specially used for quickly repairing the defects of the shield segments of concrete shields. The component A is silicone-acrylate emulsion with the Tg temperature of 35 ℃; the weight parts of the component B are shown in the table II.
Watch two
The implementation effect is shown in the fifth table.
Example three:
a quick repairing agent for shield segments is composed of polymer emulsion (component A) and premix (component B), and can be used after being uniformly stirred according to the weight ratio of 1: 6 of component A to component B when in use, and is specially used for quickly repairing the defects of the shield segments of concrete shields. The component A is silicone-acrylate emulsion with the Tg temperature of 35 ℃; the weight parts of the component B are shown in the table III.
Watch III
The implementation effect is shown in the fifth table.
Example four:
a quick repairing agent for shield segments is composed of polymer emulsion (component A) and premix (component B), and can be used after being uniformly stirred according to the weight ratio of 1: 6 of component A to component B when in use, and is specially used for quickly repairing the defects of the shield segments of concrete shields. The component A is silicone-acrylate emulsion with the Tg temperature of 35 ℃; the weight parts of the component B are shown in the fourth table.
Watch four
The implementation effect is shown in the fifth table.
Watch five
The invention has the beneficial effects that: the invention relates to a quick repairing agent for shield segments, which is a cement-based composite material modified by a silicone-acrylic emulsion, not only maintains the advantages of easy availability of inorganic materials, good durability, environmental friendliness and relatively low price, but also exerts the advantage of high flexibility of a high polymer material and is specially used for repairing the defects of concrete shield segments.
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 quick repairing agent for the shield segment is characterized by comprising a component A and a component B, wherein the component A is a silicone-acrylic emulsion, the component B is an early-strength high-strength anti-cracking anti-permeability premix, and the mass ratio of the component A to the component B is 1: 6;
the component B comprises the following components in percentage by mass: special cement
Quartz sand
Superfine powdered ore
Silicon ash
Redispersible latex powder
Special fiber
Part(s) of water-retaining thickening agent
Water reducing agent
Partial and nano anti-permeability agent
And (4) portions.
2. The quick repairing agent for the shield segment according to claim 1, wherein the component A is a silicone-acrylic emulsion with a Tg temperature of 35 ℃.
3. The shield segment rapid repairing agent according to claim 1, wherein the quartz sand is quartz machine-made sand with a fineness modulus of less than 2.2, the superfine mineral powder is ground granulated blast furnace slag micropowder of not less than S95 grade, and the water-retaining thickener is hydroxypropyl methyl cellulose.
4. The shield segment rapid repair agent according to claim 1, wherein the mass of the special fiber is that of the B component
5. The shield segment rapid repairing agent according to claim 1, wherein the component B comprises the following components in parts by weight: 330 parts of special cement, 520 parts of quartz sand, 100 parts of superfine mineral powder, 25 parts of silica fume, 15 parts of redispersible latex powder, 6 parts of special fiber, 3 parts of water retention thickener, 1.2 parts of alkali water agent and 1.5 parts of nano anti-permeability agent.
6. The shield segment rapid repairing agent according to claim 1, wherein the mass fraction of the component B is specifically as follows: 300 parts of special cement, 550 parts of quartz sand, 80 parts of superfine mineral powder, 45 parts of silica fume, 10 parts of redispersible latex powder, 8 parts of special fiber, 2 parts of water retention thickener, 1.8 parts of alkaline water agent and 1.5 parts of nano anti-permeability agent.
7. The shield segment rapid repairing agent according to claim 1, wherein the mass fraction of the component B is specifically as follows: 350 parts of special cement, 500 parts of quartz sand, 100 parts of superfine mineral powder, 30 parts of silica fume, 20 parts of redispersible latex powder, 10 parts of special fiber, 2 parts of water retention thickening agent, 1.2 parts of alkaline water agent and 2 parts of nano anti-permeability agent.
8. The shield segment rapid repairing agent according to claim 1, wherein the mass fraction of the component B is specifically as follows: 280 parts of special cement, 500 parts of quartz sand, 150 parts of superfine mineral powder, 50 parts of silica fume, 10 parts of redispersible latex powder, 6 parts of special fiber, 2 parts of water retention thickener, 1.5 parts of alkaline water agent and 1 part of nano anti-permeability agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210595810.0A CN114873972A (en) | 2022-05-30 | 2022-05-30 | Rapid repairing agent for shield segment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210595810.0A CN114873972A (en) | 2022-05-30 | 2022-05-30 | Rapid repairing agent for shield segment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114873972A true CN114873972A (en) | 2022-08-09 |
Family
ID=82679318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210595810.0A Pending CN114873972A (en) | 2022-05-30 | 2022-05-30 | Rapid repairing agent for shield segment |
Country Status (1)
| Country | Link |
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| CN (1) | CN114873972A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115490479A (en) * | 2022-09-27 | 2022-12-20 | 中德新亚建筑材料有限公司 | Ocean engineering concrete premix and preparation method thereof |
| CN115490487A (en) * | 2022-09-01 | 2022-12-20 | 中德新亚建筑材料有限公司 | Upward rapid repairing agent for uninterrupted traffic of bridges and tunnels |
| CN115745529A (en) * | 2022-11-01 | 2023-03-07 | 新特新材料集团(河南)股份有限公司 | High-ductility anti-cracking repairing agent for fabricated building |
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| CN105152587A (en) * | 2015-09-29 | 2015-12-16 | 浙江瑞高绿建科技有限公司 | Building stone and preparation method thereof |
| CN106336177A (en) * | 2016-08-22 | 2017-01-18 | 北京中德新亚建筑技术有限公司 | Two-component polymer shield tunneling segment repair agent |
| CN108863196A (en) * | 2018-08-31 | 2018-11-23 | 德州宜佳兴防水材料有限公司 | A kind of high-performance polymer road repair dedicated mortar and preparation method thereof |
| CN114180933A (en) * | 2021-12-02 | 2022-03-15 | 福州创先工程材料有限公司 | Quick pavement repairing material |
-
2022
- 2022-05-30 CN CN202210595810.0A patent/CN114873972A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105152587A (en) * | 2015-09-29 | 2015-12-16 | 浙江瑞高绿建科技有限公司 | Building stone and preparation method thereof |
| CN106336177A (en) * | 2016-08-22 | 2017-01-18 | 北京中德新亚建筑技术有限公司 | Two-component polymer shield tunneling segment repair agent |
| CN108863196A (en) * | 2018-08-31 | 2018-11-23 | 德州宜佳兴防水材料有限公司 | A kind of high-performance polymer road repair dedicated mortar and preparation method thereof |
| CN114180933A (en) * | 2021-12-02 | 2022-03-15 | 福州创先工程材料有限公司 | Quick pavement repairing material |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115490487A (en) * | 2022-09-01 | 2022-12-20 | 中德新亚建筑材料有限公司 | Upward rapid repairing agent for uninterrupted traffic of bridges and tunnels |
| CN115490479A (en) * | 2022-09-27 | 2022-12-20 | 中德新亚建筑材料有限公司 | Ocean engineering concrete premix and preparation method thereof |
| CN115745529A (en) * | 2022-11-01 | 2023-03-07 | 新特新材料集团(河南)股份有限公司 | High-ductility anti-cracking repairing agent for fabricated building |
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