CN111960796A - Rapid permeation reinforcing material for concrete degradation repair - Google Patents
Rapid permeation reinforcing material for concrete degradation repair Download PDFInfo
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- CN111960796A CN111960796A CN202010788530.2A CN202010788530A CN111960796A CN 111960796 A CN111960796 A CN 111960796A CN 202010788530 A CN202010788530 A CN 202010788530A CN 111960796 A CN111960796 A CN 111960796A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
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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)
- Sealing Material Composition (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
A rapid infiltration reinforcing material for concrete degradation repair is characterized in that: the material comprises the following raw materials in parts by weight: 30-70 parts of lithium water glass with fineness modulus of 6-12, 10-30 parts of potassium water glass with fineness modulus of 4-8, 2-6 parts of accelerator, 2-8 parts of slow-release dispersant, 10-20 parts of water-based resin, 8-16 parts of silicone oil emulsion, 0.1-0.3 part of organic tin catalyst, 1-3 parts of ether silicon defoamer and 50-100 parts of water. The rapid penetration reinforcing material can increase the compactness of concrete in a short time, increase the surface strength of the concrete, greatly improve the bonding property of a mortar repairing layer and the original concrete, reduce the risk of separation of a laminated repairing structure under the action of periodic fatigue load, ensure the long-term effect of the repairing effect, is suitable for rapidly repairing concrete corrosion diseases caused by freeze thawing, sulfate erosion and the like, and can also be used for concrete protection.
Description
Technical Field
The invention belongs to the field of building materials, and particularly relates to a rapid permeation reinforced material for concrete degradation repair.
Background
When the concrete is in service in complex environments such as freeze thawing, sulfate erosion and the like for a long time, the concrete is easy to have the denudation diseases such as pulverization, block dropping and the like, and when the concrete is serious, the internal compactness of the concrete is reduced and the overall strength is reduced. For concrete degradation diseases, the concrete is usually repaired by adopting the modes of surface layer degraded concrete removal, mortar repair and surface protection. The key of the repairing method is to ensure that the concrete loose layer is completely removed, and provide a solid foundation for mortar bonding. However, in actual construction, it is difficult to ensure that loose concrete is completely cleaned, especially a concrete structure with deep denudation depth (even with reduced overall strength), and it is not suitable to completely chisel out the concrete with insufficient strength in order to ensure structural integrity, stability and bearing capacity. Because the compactness and the strength of the concrete foundation are low, micro-cracks exist locally, so that the bonding effect of the repair mortar and the concrete is poor, and the laminated repair structure is damaged in a short time under the action of periodic fatigue load (temperature force, vibration, wind pressure and the like), and the form of the laminated repair structure is mainly that the repair mortar is separated from the bonding interface of the concrete or the concrete near the bonding interface is damaged.
In order to improve the long-term service of the laminated repairing structure, the concrete needs to be reinforced, and a good bonding foundation is created for mortar repairing. The basic strength of the looser concrete is improved by adopting high polymer materials such as epoxy resin and the like, adding a large amount of diluent to ensure that the material obtains extremely low viscosity, permeating the material into the concrete through air holes and microcracks, and improving the strength of the concrete after curing. However, the polymer material has a limited impregnation capability to concrete, and the reinforcement depth is insufficient, and the mortar repair layer and the concrete laminated repair structure are often damaged on the surface layer of the unreinforced concrete. Moreover, the polymer material is limited by environmental influence factors, and is difficult to construct particularly in rainy seasons. The volatilization of the diluent causes harm to the health of constructors. The water-based concrete reinforcing material has strong permeability, is harmless to environment and personnel, is slightly influenced by environmental factors such as water and the like, and is more suitable for reinforcing loose concrete.
The patent "a self-cleaning concrete seal curing agent" (application No. 201511016057.1), "a water-based permeable concrete seal curing agent" (application No. 201610146149. X), "a lithium-based concrete seal curing agent" (application No. 201110354668.2) and so on use sodium silicate, potassium silicate and lithium silicate as main active components, and are matched with other functional auxiliary agents to prepare the concrete reinforcing material. The silicate reacts with concrete calcium ions to generate calcium silicate, so that gaps in the concrete are filled, and the effect of increasing the compactness of the concrete is achieved. The material can improve the bonding effect of the repair mortar and the concrete by improving the compactness of the concrete, but has slower reaction speed and unobvious reinforcing effect on loose concrete. A permeable liquid hardening agent and a preparation method thereof (application No. 201510979842.0), a high-performance concrete dewstone agent and a preparation and application method thereof (application No. 201310173938.9), a super-permeable concrete reinforcing agent and a preparation method thereof (application No. 201610371966.5) and the like adopt a mode of fluosilicate or sharing the fluosilicate with silicate to improve the reaction speed of the reinforcing material and the reinforcing effect on concrete, but the fluosilicate has poor environmental protection property and reacts with the silicate, and needs to be temporarily prepared when in use, so that the use is inconvenient. The patent 'a nanometer colored concrete seal curing agent' (application number 201410010942.8) is based on silicate concrete reinforcing material, adds emulsion as modifier, emulsion infiltration ability is lower, only forms a film on the concrete surface, improves interface bonding, is convenient for fix a color.
In conclusion, the existing water-based concrete reinforcing material has low reaction speed and insufficient reinforcing effect, is not suitable for quickly reinforcing loose concrete, and cannot meet the field use requirement particularly in the field with quite limited repair time such as a high-speed railway.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to overcome the defects in the prior art and provides a rapid infiltration reinforcing material for concrete degradation repair.
The technical scheme is as follows: in order to achieve the purpose, the invention provides a rapid penetration reinforcing material for concrete degradation repair, which comprises the following raw materials in parts by weight: 30-70 parts of lithium water glass with fineness modulus of 6-12, 10-30 parts of potassium water glass with fineness modulus of 4-8, 2-6 parts of accelerator, 2-8 parts of slow-release dispersant, 10-20 parts of water-based resin, 8-16 parts of silicone oil emulsion, 0.1-0.3 part of organic tin catalyst, 1-3 parts of ether silicon defoamer and 50-100 parts of water.
The accelerant is one or more of urea, triethanolamine and sodium nitrite; the slow release dispersant is a polycarboxylic acid water reducing agent with a slow release function; the water-based resin is one or more of polyurethane aqueous solution, polyurethane dispersion, epoxy resin aqueous solution, epoxy resin dispersion, organic silicon modified polyurethane dispersion and organic silicon modified epoxy resin dispersion; the silicone oil emulsion is one or two of high hydrogen-containing silicone oil emulsion and hydroxyl-terminated silicone oil emulsion.
The preparation method of the rapid infiltration reinforced material is characterized by comprising the following steps: pouring lithium water glass, potassium water glass and part of water into a mixing kettle, heating to 50 +/-1 ℃, stirring for 60min, adding water-based resin, silicone oil emulsion and the rest of water, stirring for 30min, adding an accelerator, a slow-release dispersant, an ether silicon defoamer and an organic tin catalyst, stirring for 40min, cooling and discharging to obtain the lithium water glass slow-release dispersing agent.
The working mechanism is as follows: the rapid penetration reinforcing material adopts a three-layer reinforcing system: the stable high-modulus water glass is used as an active component, quickly permeates into the loose concrete, reacts with calcium hydroxide in the concrete in a short time, fills pores, and improves the overall compactness and strength of the concrete and the bonding effect with a mortar repair layer; the aqueous resin dispersion and the aqueous solution quickly penetrate into deeper parts in the concrete to form films in the concrete and on the surface layer, so that the overall strength of the concrete and the bonding effect with the mortar repair layer are improved; the silicone oil emulsion reacts on the concrete surface layer to form a cross-linked hydrophobic net, so that the surface performance of the concrete is further improved, and the strength and durability of the concrete surface layer are improved.
Has the advantages that: through a large number of experimental researches, the rapid infiltration reinforcing material for concrete degradation repair provided by the invention has scientific and reasonable component proportion and excellent performances as follows:
(1) the construction is convenient: the material is a single component and is directly coated on the surface of the treated concrete.
(2) Strong permeability: the penetration depth of the C30 concrete is more than or equal to 8 mm.
(3) The reinforcing effect on concrete is excellent: the overall strength of the loose concrete can be improved in a short time, and after the loose concrete is coated for 2-4 hours, the surface strength of the C30 concrete can be improved by more than 5%.
(4) The interface bonding effect is effectively improved: the bonding strength of the repair mortar and the concrete can be greatly improved by more than 50%.
(5) The durability of the concrete is improved: the frost resistance and the sulfate erosion resistance of the concrete can be obviously improved, and the times of freeze-thaw cycle and dry-wet cycle are improved by more than 30%.
(6) The environmental suitability is strong: the concrete base surface can be normally used under the condition of moisture or high water content.
Detailed Description
The following examples are given to illustrate the present invention and are not intended to limit the scope of the present invention.
Example 1
Pouring 30 parts of lithium water glass, 10 parts of potassium water glass and 30 parts of water into a mixing kettle, heating to 50 +/-1 ℃, stirring for 60min, adding 2 parts of polyurethane aqueous solution, 2 parts of polyurethane dispersion, 1 part of epoxy resin aqueous solution, 1 part of epoxy resin dispersion, 2 parts of organic silicon modified polyurethane dispersion, 2 parts of organic silicon modified epoxy resin dispersion, 4 parts of high-hydrogen silicone oil emulsion, 4 parts of hydroxyl-terminated silicone oil emulsion and 20 parts of water, stirring for 30min, adding 0.5 part of urea, 0.5 part of triethanolamine, 1 part of sodium nitrite, 2 parts of slow-release dispersant, 1 part of ether silicon defoamer and 0.1 part of organic tin catalyst, stirring for 40min, cooling and discharging to obtain the product.
Example 2
Pouring 70 parts of lithium water glass, 30 parts of potassium water glass and 60 parts of water into a mixing kettle, heating to 50 +/-1 ℃, stirring for 60min, adding 4 parts of polyurethane aqueous solution, 4 parts of polyurethane dispersion, 2 parts of epoxy resin aqueous solution, 2 parts of epoxy resin dispersion, 3 parts of organic silicon modified polyurethane dispersion, 5 parts of organic silicon modified epoxy resin dispersion, 6 parts of high-hydrogen silicone oil emulsion, 10 parts of hydroxyl-terminated silicone oil emulsion and 40 parts of water, stirring for 30min, adding 2 parts of urea, 2 parts of triethanolamine, 2 parts of sodium nitrite, 8 parts of slow-release dispersant, 3 parts of ether silicon defoamer and 0.3 part of organic tin catalyst, stirring for 40min, cooling and discharging.
Example 3
Pouring 50 parts of lithium water glass, 20 parts of potassium water glass and 50 parts of water into a mixing kettle, heating to 50 +/-1 ℃, stirring for 60min, adding 15 parts of epoxy resin dispersion liquid, 12 parts of high-hydrogen silicone oil emulsion and 25 parts of water, stirring for 30min, adding 4 parts of urea, 5 parts of slow-release dispersant, 2 parts of ether silicon defoamer and 0.2 part of organic tin catalyst, stirring for 40min, cooling and discharging to obtain the aqueous lithium ion battery.
Example 4
Pouring 60 parts of lithium water glass, 25 parts of potassium water glass and 60 parts of water into a mixing kettle, heating to 50 +/-1 ℃, stirring for 60min, adding 4.5 parts of polyurethane aqueous solution, 3 parts of epoxy resin dispersion liquid, 5 parts of organic silicon modified polyurethane dispersion liquid, 5 parts of organic silicon modified epoxy resin dispersion liquid, 6 parts of high hydrogen-containing silicone oil emulsion, 8 parts of hydroxyl-terminated silicone oil emulsion and 27.5 parts of water, stirring for 30min, adding 3 parts of triethanolamine, 2 parts of sodium nitrite, 6.5 parts of slow-release dispersant, 2.5 parts of ether silicon defoamer and 0.25 part of organic tin catalyst, stirring for 40min, cooling and discharging to obtain the product.
Example 5
Pouring 40 parts of lithium water glass, 15 parts of potassium water glass and 40 parts of water into a mixing kettle, heating to 50 +/-1 ℃, stirring for 60min, adding 2.5 parts of epoxy resin aqueous solution, 5 parts of organic silicon modified polyurethane dispersion liquid, 5 parts of organic silicon modified epoxy resin dispersion liquid, 6 parts of high hydrogen-containing silicone oil emulsion, 4 parts of hydroxyl-terminated silicone oil emulsion and 22.5 parts of water, stirring for 30min, adding 2 parts of urea, 1 part of sodium nitrite, 3.5 parts of slow-release dispersant, 1.5 parts of ether silicon defoamer and 0.15 part of organic tin catalyst, stirring for 40min, cooling and discharging to obtain the silicon nitride/silicon composite material.
Example 6
Pouring 55 parts of lithium water glass, 12 parts of potassium water glass and 50 parts of water into a mixing kettle, heating to 50 +/-1 ℃, stirring for 60min, adding 4 parts of polyurethane aqueous solution, 8 parts of organosilicon modified polyurethane dispersion, 6 parts of organosilicon modified epoxy resin dispersion, 3 parts of high-hydrogen silicone oil emulsion, 6 parts of hydroxyl-terminated silicone oil emulsion and 35 parts of water, stirring for 30min, adding 2.5 parts of triethanolamine, 7 parts of slow-release dispersant, 1.3 parts of ether silicon defoamer and 0.22 part of organic tin catalyst, stirring for 40min, cooling and discharging to obtain the product.
The application performance test results of the rapid infiltration reinforcing materials provided in the embodiments 1 to 6 and the commercially available concrete reinforcing materials are shown in the following table, wherein the strength grade of the concrete is C30, and the freeze-damaged concrete is the concrete whose surface layer is pulverized and peeled after the freeze-thaw cycle is performed on the C30 concrete for 100-150 times.
Claims (6)
1. A rapid infiltration reinforcing material for concrete degradation repair is characterized in that: the material comprises the following raw materials in parts by weight: 30-70 parts of lithium water glass with fineness modulus of 6-12, 10-30 parts of potassium water glass with fineness modulus of 4-8, 5-15 parts of accelerator, 2-8 parts of slow-release dispersant, 10-20 parts of water-based resin, 8-16 parts of silicone oil emulsion, 0.1-0.3 part of organic tin catalyst, 1-3 parts of defoaming agent and 50-100 parts of water.
2. A rapid penetration enhancing material for concrete degradation repair as set forth in claim 1, wherein: the accelerant is one or more of urea, triethanolamine and sodium nitrite.
3. A rapid penetration enhancing material for concrete degradation repair as set forth in claim 1, wherein: the slow-release dispersing agent is a polycarboxylic acid water reducing agent with a slow-release function.
4. A rapid penetration enhancing material for concrete degradation repair as set forth in claim 1, wherein: the water-based resin is one or more of polyurethane aqueous solution, polyurethane dispersion liquid, epoxy resin aqueous solution, epoxy resin dispersion liquid, organic silicon modified polyurethane dispersion liquid and organic silicon modified epoxy resin dispersion liquid.
5. A rapid penetration enhancing material for concrete degradation repair as set forth in claim 1, wherein: the silicone oil emulsion is one or two of high-hydrogen silicone oil emulsion and hydroxyl-terminated silicone oil emulsion.
6. The method for preparing a rapid penetration enhancing material according to any one of claims 1 to 4, wherein: pouring lithium water glass, potassium water glass and part of water into a mixing kettle, heating to 50 +/-1 ℃, stirring for 60min, adding water-based resin, silicone oil emulsion and the rest of water, stirring for 30min, adding an accelerator, a slow-release dispersant, an ether silicon defoamer and an organic tin catalyst, stirring for 40min, cooling and discharging to obtain the lithium water glass slow-release dispersing agent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010788530.2A CN111960796A (en) | 2020-08-07 | 2020-08-07 | Rapid permeation reinforcing material for concrete degradation repair |
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| CN202010788530.2A CN111960796A (en) | 2020-08-07 | 2020-08-07 | Rapid permeation reinforcing material for concrete degradation repair |
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| CN111960796A true CN111960796A (en) | 2020-11-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2812138C1 (en) * | 2022-12-20 | 2024-01-23 | ООО Юго-западный научно-исследовательский институт "Китайской железнодорожной строительной корпорации" | Freezing and thawing-resistant concrete material, method of its manufacture and application |
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| CN102503347A (en) * | 2011-11-10 | 2012-06-20 | 上海三瑞化学有限公司 | Lithium-based concrete sealing solidifying agent |
| CN105777045A (en) * | 2016-02-06 | 2016-07-20 | 辽宁省水利水电科学研究院 | Permeable interface coating treatment construction method in humid environment |
| KR101907917B1 (en) * | 2018-04-06 | 2018-10-15 | 이광진 | Repairing and reinforcing structure of concrete building, and the method for the same |
| CN108751919A (en) * | 2018-07-26 | 2018-11-06 | 湖南峰航新材料科技有限公司 | A kind of concrete fine fisssure patching material and the preparation method and application thereof |
| CN110482994A (en) * | 2019-09-11 | 2019-11-22 | 湖南峰航新材料科技有限公司 | A kind of concrete microcrack closed material and its preparation method and application |
| CN111285646A (en) * | 2020-02-04 | 2020-06-16 | 北京建筑大学 | Epoxy resin modified crack repair mortar and preparation and use methods thereof |
-
2020
- 2020-08-07 CN CN202010788530.2A patent/CN111960796A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102503347A (en) * | 2011-11-10 | 2012-06-20 | 上海三瑞化学有限公司 | Lithium-based concrete sealing solidifying agent |
| CN105777045A (en) * | 2016-02-06 | 2016-07-20 | 辽宁省水利水电科学研究院 | Permeable interface coating treatment construction method in humid environment |
| KR101907917B1 (en) * | 2018-04-06 | 2018-10-15 | 이광진 | Repairing and reinforcing structure of concrete building, and the method for the same |
| CN108751919A (en) * | 2018-07-26 | 2018-11-06 | 湖南峰航新材料科技有限公司 | A kind of concrete fine fisssure patching material and the preparation method and application thereof |
| CN110482994A (en) * | 2019-09-11 | 2019-11-22 | 湖南峰航新材料科技有限公司 | A kind of concrete microcrack closed material and its preparation method and application |
| CN111285646A (en) * | 2020-02-04 | 2020-06-16 | 北京建筑大学 | Epoxy resin modified crack repair mortar and preparation and use methods thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2812138C1 (en) * | 2022-12-20 | 2024-01-23 | ООО Юго-западный научно-исследовательский институт "Китайской железнодорожной строительной корпорации" | Freezing and thawing-resistant concrete material, method of its manufacture and application |
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