CN112727219A - Corrosion-resistant and waterproof protection structure and method for system of concrete structure container type structure and application - Google Patents
Corrosion-resistant and waterproof protection structure and method for system of concrete structure container type structure and application Download PDFInfo
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- CN112727219A CN112727219A CN202011565218.3A CN202011565218A CN112727219A CN 112727219 A CN112727219 A CN 112727219A CN 202011565218 A CN202011565218 A CN 202011565218A CN 112727219 A CN112727219 A CN 112727219A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H7/00—Construction or assembling of bulk storage containers employing civil engineering techniques in situ or off the site
- E04H7/02—Containers for fluids or gases; Supports therefor
- E04H7/18—Containers for fluids or gases; Supports therefor mainly of concrete, e.g. reinforced concrete, or other stone-like material
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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
- C04B28/02—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
- C04B28/06—Aluminous cements
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/002—Priming paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
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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
- C04B2111/00241—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
-
- 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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
Abstract
The invention belongs to the field of concrete structure protection, and particularly relates to a system corrosion-resistant waterproof protection structure of a concrete structure container type structure, a protection method and application. This corrosion-resistant waterproof protective structure of system includes by inside to outside in proper order: the concrete structure comprises an anti-corrosion waterproof layer, an inner surface repairing layer, a deep reinforcing layer, a concrete structure layer and an external waterproof protective layer. The invention solves the problem of the current industrial situation that the material and engineering requirements are separated, and defines the material performance required by the engineering from the perspective of application technology, thereby realizing the product formula design. The problem of corrosion-resistant protective layer design take the corrosion-resistant protective layer of organic material as the basis with inorganic concrete between the modulus difference big, the temperature shrinkage deformation is asynchronous, lead to compounding between operation period protective layer and the concrete basic unit bad, appear bulging, fracture, even one-tenth piece drops to lose the life of safeguard function influence structure is solved.
Description
Technical Field
The invention belongs to the field of concrete structure protection, and particularly relates to a system corrosion-resistant waterproof protection structure of a concrete structure container type structure, a protection method and application.
Background
1. Project background
In recent years, with the improvement of environmental protection requirements, a large number of containers using reinforced concrete as a structure are developed in the field of environmental engineering for containing water bodies containing corrosive substances. Such as a garbage pool and a garbage leachate storage pool in the garbage incineration power generation project; the structures of various sewage pools and the like of urban and industrial sewage treatment projects all use silicate concrete as structures, and corrosive media (corrosive water and corrosive solid waste) are contained in the structures.
Different from a metal structure container, when portland cement concrete is subjected to continuous water penetration, calcium corrosion caused by the water penetration can easily cause a series of concrete diseases (diseases such as concrete neutralization, steel bar corrosion, surface layer peeling, alkali aggregate reaction, freeze-thaw damage, concrete carbonization and the like), particularly corrosive substances (acid, alkali and salt) are contained in a water body, the corrosive diseases are more severe, the consequences are more serious, and the service life of the structure is finally shortened seriously.
Currently, the international common anti-corrosion method is to use anti-corrosion resin material to construct a protective layer to isolate the corrosive medium. Whether the container is a metal container or a concrete container, the cracking and the falling of the anti-corrosion protective layer are difficult to overcome because the physical and mechanical properties of the anti-corrosion resin are greatly different from those of the container material.
Portland cement concrete is a graded aggregate composed of stones, sand and cement, although theoretically, technical measures capable of ensuring engineering (anti-permeability) safety exist; however, in actual engineering, due to the limitation of a plurality of practical factors, the integrity of the concrete structure of the structure has great mass inconsistency; construction quality defects such as honeycomb, holes, temperature cracks caused by hydration heat and the like caused by bin dividing joints, construction joints and aggregate segregation in the concrete pouring process generally exist. These construction quality defects may not have a great effect in general construction works, but may have very serious consequences in container-type structures.
2. Current state of protection of concrete structures
Concrete structure protection and metal structure protection are completely different engineering technical systems, and from the engineering technical perspective, a proper protection product is designed according to materials. Although the protection technology and product development of metal structures at home and abroad reach a high level, the engineering risk can be caused when the related technology and products are directly used for concrete structures. The protection of domestic concrete structures is lack of engineering technology cognition in the industry, and the protection technology of metal structures is carried out, so that various engineering diseases appear in one to three years after the project is put into operation.
The protection of concrete structures depends on two key technologies, namely product technology and engineering technology, which are mutually negative terms. Good products are basic for providing various medium corrosion resistance and waterproof requirements, engineering technology is a necessary means for implementing the good products into actual engineering, and the performance of the products which are not good by the good engineering technology cannot be completely reflected. At present, the industry lacks the basic understanding, and focuses on emphasizing the physical performance indexes of the products, which is also one of the main continuous reasons of the engineering problems in the industry.
At present, the prior art in water leakage maintenance generally adopts a shallow grouting technology, that is, a section suitable for top is defined on concrete at a leakage position according to the area of the leakage position to directly perform punching grouting for maintenance, as shown in the figure I. When the method is used for maintenance, the effect of stopping leakage can be achieved immediately, but new leakage can occur around the original leakage point along with the lapse of time. Because the method only stops the leakage on the concrete surface layer, the leakage water comes from the underground water pressure outside the concrete structure layer of the wall body or the bottom plate, once the leakage water is on the surface of the concrete structure, the water spreads and diffuses in the concrete structure, and the leakage can not be solved from the source when the leakage is stopped.
Disclosure of Invention
The invention aims to solve the problems, provides a system corrosion-resistant waterproof protection structure of a concrete structure container structure, a protection method and application based on the corrosion-resistant waterproof requirement of the concrete structure and the engineering requirement and aiming at the engineering reality of insufficient protection of the concrete structure in environmental engineering.
In order to achieve the above object, a first aspect of the present invention provides a corrosion-resistant waterproof protective structure for a system of a concrete structure container type structure, which is characterized in that the corrosion-resistant waterproof protective structure comprises, from inside to outside:
the concrete structure comprises an anti-corrosion waterproof layer, an inner surface repairing layer, a deep reinforcing layer, a concrete structure layer and an external waterproof protective layer.
According to the invention, the concrete structure layer refers to the structure of a concrete structure container type structure.
Preferably, the anti-corrosion waterproof layer comprises the following components in sequence from inside to outside:
a permeable resin bottom coating, a resin daub middle coating and a resin closed surface coating.
The second aspect of the present invention provides a protection method for the corrosion-resistant waterproof protection structure of the system of the concrete structure container type structure, which comprises:
(1) performing waterproof protection on the exterior of the concrete structure to form an external waterproof protection layer;
(2) performing defect repair on the interior of the concrete structure, wherein the defect repair comprises surface repair and deep reinforcement treatment, and a deep reinforcing layer and an inner surface repair layer are sequentially formed;
(3) and carrying out anti-corrosion and waterproof treatment on the inner wall of the concrete structure to form an anti-corrosion waterproof layer.
Preferably, the waterproof protection of the exterior of the concrete structure comprises: and (3) isolating the outside of the concrete structure by adopting a waterproof sheet or a paint waterproof layer for waterproof protection of external environment water. The method for waterproof protection of the exterior of the concrete structure belongs to the technical means conventionally adopted by the technicians in the field, and the technicians in the field can select the method according to the needs. The protection of concrete structure will completely cut off outer environment water, and waterproof effect outside the structure is first to protect concrete structure inner wall anticorrosion layer to avoid the infiltration of back infiltration and soak and destroy, and second prevents that outer environment hydrogeology changes and produces uncontrollable harmful effects to the structure.
According to the invention, in the step (2), the defect inside the concrete structure belongs to a concrete defect and is represented by at least one of honeycomb, holes, pitted surface and slurry leakage.
Preferably, in the step (2), the step of repairing the surface includes: adopting single-component high-strength anti-permeability thin layer repairing mortar to carry out surface layer weak interface removal and surface dominant defect treatment to form an inner surface repairing layer; and a thin layer batch scraping mode is adopted for removing the weak interface of the surface layer and treating the apparent defects of the surface layer.
Preferably, the single-component high-strength impervious thin layer repair mortar comprises the following components in parts by weight:
500 parts of special cement 400-containing material, 0-60 parts of triple superphosphate, 500 parts of quartz sand and/or river sand 400-containing material, 2-5 parts of retarder, 0.3-0.8 part of lithium carbonate, 30-40 parts of redispersible rubber powder, 0.6-1.0 part of water-retaining agent, 0-0.6 part of water reducing agent, 0-0.5 part of defoaming agent and 180 parts of water 140-containing material.
The single-component high-strength anti-permeability thin layer repairing mortar has similar physical and mechanical properties with concrete, and when the single-component high-strength anti-permeability thin layer repairing mortar is used for conducting thin layer batch scraping, if the batch scraping is carried out for 2mm, the bonding strength of more than 2.0 MPa can be achieved in 3 days, the anti-permeability capacity of more than 1.0 MPa can be achieved, the 28-day breaking strength of the mortar is about 10 MPa, the compressive strength of 50 MPa and the bonding strength of 3.0 MPa, and the mortar has good compactness, excellent anti-permeability and waterproof properties, alkali resistance, sulfate corrosion resistance, good durability and excellent anti-cracking property. The mortar gets rid of the traditional construction procedures of waterproof layer, repairing and leveling mortar and anti-corrosion mortar, achieves the aim of one step, shortens the construction period and has wide application. The single-component high-strength impervious thin layer repair mortar provides a good base layer for subsequent inner surface protection. The single-component high-strength impervious thin layer repair mortar can improve the bonding strength of materials and a concrete base layer, reduce cracking, increase corrosion resistance and waterproof performance, simultaneously reduce the use procedures and construction period of the materials, finish the repair of the poor surface of the concrete, and increase the durability and service life of a concrete structure. The mortar has excellent bonding strength and anti-permeability, waterproof and anti-corrosion performances.
As a preferred scheme, the single-component high-strength impervious thin layer repair mortar is more suitable for quickly repairing honeycombs, pitted surfaces and holes of concrete buildings and provides a smooth and firm base layer for anticorrosive paint.
Preferably, the special cement is sulphoaluminate cement and/or high-alumina cement. As a preferable scheme, in order to meet the use conditions, the sulphoaluminate cement which is high in early strength and rapid in hardening and low in shrinkage rate is selected, so that the sulphoaluminate cement has good compatibility with a concrete base layer, and is short in construction period and high in early strength.
Preferably, the particle size of the quartz sand and/or river sand is 30-200 meshes.
Preferably, the coarse whiting is powdered calcium powder with the particle size of 280-400 meshes.
Preferably, the retarder is at least one selected from sodium citrate, sodium gluconate and anhydrous citric acid.
In order to increase the bonding strength of the mortar, the mortar is reinforced with redispersible rubber powder. The rubber powder can improve the bonding strength, compactness, impact resistance, anti-permeability and durability of the mortar. Preferably, the redispersible rubber powder is at least one of styrene-acrylic rubber powder, VAE rubber powder and polyvinyl alcohol powder.
Preferably, the water-retaining agent is at least one selected from cellulose ether, wood fiber and amylase. As a further preferable mode, the addition of cellulose ether to mortar can improve the cohesiveness of mortar, prevent bleeding and improve workability. As a further preferable scheme, the water retention agent is a mixture of cellulose ether and wood fiber, and the particle size of the wood fiber is 200-500 microns. The wood fiber can reduce the water content gradient after mortar construction through capillary action, reduce cracking and improve the thixotropy and the construction performance of the mortar. The comprehensive action of the cellulose ether and the wood fiber ensures that the mortar does not sag when being scraped on the top surface and the vertical surface of the concrete.
Preferably, in the step (2), the deep reinforcement treatment includes: deep layer grouting is adopted to carry out deep layer reinforcement treatment on the interior of the concrete structure to form a deep layer reinforcement layer; the deep reinforcing treatment means solves the problem of neglecting the influence of the concrete quality on the realization of the corrosion-resistant and waterproof functions in the industry, and reduces the engineering risk.
The deep grouting device comprises:
grouting machine;
the connector comprises a connecting pipe and a quick-connection female head, one end of the connecting pipe is connected to the grouting machine, and the quick-connection female head is arranged at the other end of the connecting pipe;
the grouting head comprises a grouting pipe, a quick-connection male head, a filling structure and a check valve, wherein a grouting nozzle is arranged at one end of the grouting pipe, the quick-connection male head is arranged at the other end of the grouting pipe and is in threaded connection with the outer wall of the grouting pipe, the filling structure is sleeved on the grouting pipe and is arranged between the grouting nozzle and the quick-connection male head, the grouting pipe can be inserted into a quick-connection female head of the connector through the quick-connection male head, the quick-connection female head can drive the quick-connection male head to rotate so as to extrude the filling structure, the outer diameter of the filling structure expands to fill a gap between the outer wall of the grouting pipe and the hole wall of the grouting hole, and the check valve is arranged in the grouting pipe and is used for preventing grouting from flowing back to the connector through the grouting pipe.
Preferably, the step of performing deep reinforcement treatment on the interior of the concrete structure by using a deep grouting device includes:
1) determining a leakage position;
2) drilling a grouting hole in the center of the leakage position according to the thickness of the concrete structure layer of the leakage position;
3) connecting the grouting head to the connector and sending the grouting head into the grouting hole, and rotating the quick-connection male head through the connector to extrude the filling structure so that the filling structure just blocks the grouting hole;
4) the grouting head is sent to the deepest part of the grouting hole, the quick-connection male head is continuously rotated through the connector to further extrude the filling structure, so that the filling structure completely fills a gap between the grouting head and the hole wall of the grouting hole and is clamped and fixed in the grouting hole;
5) and starting a grouting machine to perform pressurized grouting in the grouting holes.
Preferably, in the step (3), the step of performing corrosion-proof and water-proof treatment on the inner wall of the concrete structure comprises:
constructing a modified resin corrosion-resistant waterproof layer system on the inner wall of the concrete structure to form a corrosion-resistant waterproof layer, wherein the system is obtained according to the engineering principle of a composite material system and aiming at the material characteristics and physical and mechanical property characteristics of silicate concrete;
the modified resin corrosion-resistant waterproof layer system sequentially comprises: a permeable resin bottom coating, a resin daub middle coating and a resin closed surface coating;
wherein the permeable resin base coat is an epoxy resin layer;
the raw materials for preparing the resin daub middle coating comprise: epoxy resin, a curing agent, first powder, water and optional auxiliary agents; the mass ratio of the epoxy resin to the curing agent is 1: 1.4-1.8; relative to 1 part by weight of the mixture of the epoxy resin and the curing agent, the dosage of the first powder is 1.5-1.8 parts, the dosage of water is 0.05-0.3 part, and the dosage of the auxiliary agent is 0-5 parts; based on the total weight of the first powder, the first powder comprises 80-90 wt% of quartz powder, 10-20 wt% of micro silicon powder, 0.05-0.2 wt% of carbon black and 0.05-0.2 wt% of titanium dioxide, and the sum of the components is 100 wt%;
the raw materials for preparing the resin sealing surface coating comprise: epoxy resin, a curing agent, second powder, water and optional auxiliary agents; the mass ratio of the epoxy resin to the curing agent is 1: 1.4-1.8; relative to 10 parts by weight of the mixture of the epoxy resin and the curing agent, the using amount of the second powder is 1.5-2.5 parts, the using amount of the water is 2-3 parts, and the using amount of the auxiliary agent is 0-2 parts; the second powder comprises mica powder, carbon black and titanium dioxide, and the mass ratio of the mica powder to the carbon black to the titanium dioxide is 1: 1: 0.05-0.1.
Preferably, the raw materials for preparing the permeable resin base coat comprise: an epoxy resin, a curing agent, water, and optionally a defoamer; the mass ratio of the epoxy resin to the curing agent to the water is 1: (1.4-1.8): (2-3); the content of the defoaming agent is 0-3 wt% based on the total weight of the mixture of the epoxy resin, the curing agent and the water.
A third aspect of the invention provides the use of the above-described method of protection in the field of protection of concrete structures.
The invention has the beneficial effects that:
the invention provides a clear engineering system design idea for protection requirements of concrete materials, and the concrete structure comprises external waterproofing of the concrete structure, treatment of the concrete and internal protection of the concrete.
The invention guides the control of the construction quality of the industry and solves the problem of random disorder of the construction of the industry. The scheme of the invention solves the problem of the current industrial situation that the material and engineering requirements are separated, and defines the material performance required by the engineering from the perspective of application technology, thereby realizing the product formula design. The problem of corrosion-resistant protective layer design take the corrosion-resistant protective layer of organic material as the basis with inorganic concrete between the modulus difference big, the temperature shrinkage deformation is asynchronous, lead to compounding between operation period protective layer and the concrete basic unit bad, appear bulging, fracture, even one-tenth piece drops to lose the life of safeguard function influence structure is solved.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
Figure 1 shows a prior art shallow grouting technique.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In the embodiment of the invention, the concrete structure container type structure is a concrete structure which has the problems that certain concrete quality defect needs pretreatment, honeycomb, pitted surface and crack are not practical in the interior, and the surface maintenance is insufficient to form a weak interface.
Example 1
The embodiment provides a corrosion-resistant waterproof protection structure and a protection method for a system of a concrete structure container type structure, wherein the corrosion-resistant waterproof protection method for the system comprises the following steps:
(1) performing waterproof protection on the exterior of the concrete structure to form an external waterproof protection layer;
(2) performing defect repair on the interior of the concrete structure, wherein the defect repair comprises surface repair and deep reinforcement treatment, and a deep reinforcing layer and an inner surface repair layer are sequentially formed;
(3) and carrying out anti-corrosion and waterproof treatment on the inner wall of the concrete structure to form an anti-corrosion waterproof layer.
In the step (1), the waterproof protection of the concrete structure exterior comprises: adopt waterproof sheet to carry out isolated external environment water-proof protection to the concrete structure outside.
In the step (2), the surface repairing step includes: adopting single-component high-strength anti-permeability thin layer repair mortar to carry out surface layer weak interface cleaning and surface dominant defect treatment; the surface weak interface is removed and the surface dominant defect is treated by adopting a thin-layer batch scraping mode, the surface weak interface is firstly removed, then the following repair mortar is smeared at the surface dominant defect of the concrete to be repaired, and the concrete is ground by a scraper.
The single-component high-strength impervious thin layer repair mortar comprises the following components in parts by weight: 500 parts of high belite sulphoaluminate cement, 30 parts of coarse whiting with the particle size of 300 meshes, 440 parts of river sand with the particle size of 30-200 meshes, 3 parts of anhydrous citric acid, 0.5 part of lithium carbonate, 30 parts of styrene-acrylic rubber powder, 0.3 part of wood fiber with the particle size of 200-micron, 0.3 part of cellulose ether, 0.4 part of water reducing agent and 160 parts of water. The materials are stirred for 5 minutes under the action of a stirrer, and uniform repair mortar slurry can be obtained.
In the step (2), the deep reinforcement treatment step includes: deep layer grouting is adopted to carry out deep layer reinforcement treatment on the interior of the concrete structure;
the deep slip casting device includes:
grouting machine;
the connector comprises a connecting pipe and a quick-connection female head, one end of the connecting pipe is connected to the grouting machine, and the quick-connection female head is arranged at the other end of the connecting pipe;
the grouting head comprises a grouting pipe, a quick-connection male head, a filling structure and a check valve, wherein a grouting nozzle is arranged at one end of the grouting pipe, the quick-connection male head is arranged at the other end of the grouting pipe and is in threaded connection with the outer wall of the grouting pipe, the filling structure is sleeved on the grouting pipe and is arranged between the grouting nozzle and the quick-connection male head, the grouting pipe can be inserted into a quick-connection female head of the connector through the quick-connection male head, the quick-connection female head can drive the quick-connection male head to rotate so as to extrude the filling structure, the outer diameter of the filling structure expands to fill a gap between the outer wall of the grouting pipe and the hole wall of the grouting hole, and the check valve is arranged in the grouting pipe and is used for preventing grouting from flowing back to the connector through the grouting pipe.
The deep layer grouting device is adopted to carry out deep layer reinforcement treatment on the interior of the concrete structure, and the method comprises the following steps:
1) determining a leakage position;
2) drilling a grouting hole in the center of the leakage position according to the thickness of the concrete structure layer of the leakage position;
3) connecting the grouting head to the connector and sending the grouting head into the grouting hole, and rotating the quick-connection male head through the connector to extrude the filling structure so that the filling structure just blocks the grouting hole;
4) the grouting head is sent to the deepest part of the grouting hole, the quick-connection male head is continuously rotated through the connector to further extrude the filling structure, so that the filling structure completely fills a gap between the grouting head and the hole wall of the grouting hole and is clamped and fixed in the grouting hole;
5) and starting a grouting machine to perform pressurized grouting in the grouting holes.
The steps of the deep consolidation process and the apparatus used are described in the examples of the patent application No. 201911013488.0.
In the step (3), the step of performing anti-corrosion and waterproof treatment on the inner wall of the concrete structure comprises the following steps: the modified resin corrosion-resistant waterproof layer system is constructed on the inner wall of a concrete structure, and specifically, the modified resin corrosion-resistant waterproof layer system described in example 1 in the patent application with the application number of 201811644923.5 is adopted.
Test example:
after the corrosion-resistant and waterproof protection method of the system in the embodiment 1 is adopted for treatment, the corrosion-resistant and waterproof protection structure of the system of the concrete structure container type structure is obtained, and the corrosion-resistant and waterproof protection structure of the system comprises the following components in sequence from inside to outside: the concrete structure comprises an anti-corrosion waterproof layer, an inner surface repairing layer, a deep reinforcing layer, a concrete structure layer and an external waterproof protective layer; the anti-corrosion waterproof layer comprises the following components in sequence from inside to outside: a permeable resin bottom coating, a resin daub middle coating and a resin closed surface coating. The three-layer structure composite system is tested on water resistance (10d), salt spray resistance test (1000h), ultraviolet aging resistance (1000h), alkali resistance (saturated calcium hydroxide, 10d), alkali resistance (saturated sodium hydroxide, 10d), acid resistance (10% sulfuric acid, 10d), acid resistance (25% sulfuric acid, 10d), bonding strength (MPa), hardness, impermeability (mortar water facing surface, MPa), wear resistance (1000g/100r/mg), impact resistance (0.5kg. m), ozone resistance (1000pphm 40 ℃, 168h), permeability coefficient (cm/s), linear expansion coefficient and penetration depth, wherein the technical requirements of the three-layer structure composite system are shown in table 1 (indexes 13-16 are enterprise marks), and the actual measurement results are shown in table 2.
TABLE 1
TABLE 2
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. The utility model provides a corrosion-resistant waterproof protective structure of system of concrete structure container class structure which characterized in that, this corrosion-resistant waterproof protective structure of system includes by interior outside in proper order:
the concrete structure comprises an anti-corrosion waterproof layer, an inner surface repairing layer, a deep reinforcing layer, a concrete structure layer and an external waterproof protective layer.
2. The corrosion-resistant, waterproof and protective system structure of claim 1, wherein said corrosion-resistant and waterproof layer comprises, in order from the inside to the outside:
a permeable resin bottom coating, a resin daub middle coating and a resin closed surface coating.
3. The method of protecting a corrosion-resistant, water-proof protective structure of a system according to claim 1 or 2, characterized in that it comprises:
(1) performing waterproof protection on the exterior of the concrete structure to form an external waterproof protection layer;
(2) performing defect repair on the interior of the concrete structure, wherein the defect repair comprises surface repair and deep reinforcement treatment, and a deep reinforcing layer and an inner surface repair layer are sequentially formed;
(3) and carrying out anti-corrosion and waterproof treatment on the inner wall of the concrete structure to form an anti-corrosion waterproof layer.
4. The method of protecting against water as claimed in claim 3, wherein said protecting against water the exterior of the concrete structure comprises:
and (3) adopting a waterproof sheet or a paint waterproof layer to isolate the outside of the concrete structure from external environment water for waterproof protection to form an external waterproof protection layer.
5. The method of claim 3, wherein in step (2), the step of resurfacing comprises:
adopting single-component high-strength anti-permeability thin layer repairing mortar to carry out surface layer weak interface removal and surface dominant defect treatment to form an inner surface repairing layer;
and a thin layer batch scraping mode is adopted for removing the weak interface of the surface layer and treating the apparent defects of the surface layer.
6. The protection method according to claim 5, wherein the one-component high-strength impervious thin layer repair mortar comprises the following components in parts by weight:
500 parts of special cement 400-containing material, 0-60 parts of triple superphosphate, 500 parts of quartz sand and/or river sand 400-containing material, 2-5 parts of retarder, 0.3-0.8 part of lithium carbonate, 30-40 parts of redispersible rubber powder, 0.6-1.0 part of water-retaining agent, 0-0.6 part of water reducing agent, 0-0.5 part of defoaming agent and 180 parts of water 140-containing material.
7. The shielding method according to claim 6,
the special cement is sulphoaluminate cement and/or high-alumina cement;
the particle size of the quartz sand and/or river sand is 30-200 meshes;
the coarse whiting is powdery calcium powder with the particle size of 280-400 meshes;
the retarder is selected from at least one of sodium citrate, sodium gluconate and anhydrous citric acid;
the redispersible rubber powder is at least one of styrene-acrylic rubber powder, VAE rubber powder and polyvinyl alcohol powder;
the water retaining agent is selected from at least one of cellulose ether, wood fiber and amylase.
8. The shielding method according to claim 3, wherein in the step (2), the deep reinforcement treatment step comprises:
deep layer grouting is adopted to carry out deep layer reinforcement treatment on the interior of the concrete structure to form a deep layer reinforcement layer;
the deep grouting device comprises:
grouting machine;
the connector comprises a connecting pipe and a quick-connection female head, one end of the connecting pipe is connected to the grouting machine, and the quick-connection female head is arranged at the other end of the connecting pipe;
the grouting device comprises a grouting pipe, a quick-connection male head, a filling structure and a check valve, wherein one end of the grouting pipe is provided with a grouting nozzle, the quick-connection male head is arranged at the other end of the grouting pipe and is in threaded connection with the outer wall of the grouting pipe, the filling structure is sleeved on the grouting pipe and is arranged between the grouting nozzle and the quick-connection male head, the grouting pipe can be inserted into a quick-connection female head of the connector through the quick-connection male head, the quick-connection female head can drive the quick-connection male head to rotate so as to extrude the filling structure, the outer diameter of the filling structure is expanded so as to fill a gap between the outer wall of the grouting pipe and the hole wall of the grouting hole, and the check valve is arranged in the grouting pipe and is used for preventing grouting from flowing back to the connector through the grouting pipe;
preferably, the step of performing deep reinforcement treatment on the interior of the concrete structure by using a deep grouting device comprises:
1) determining a leakage position;
2) drilling a grouting hole in the center of the leakage position according to the thickness of the concrete structure layer of the leakage position;
3) connecting the grouting head to the connector and sending the grouting head into the grouting hole, and rotating the quick-connection male head through the connector to extrude the filling structure so that the filling structure just blocks the grouting hole;
4) the grouting head is sent to the deepest part of the grouting hole, the quick-connection male head is continuously rotated through the connector to further extrude the filling structure, so that the filling structure completely fills a gap between the grouting head and the hole wall of the grouting hole and is clamped and fixed in the grouting hole;
5) and starting a grouting machine to perform pressurized grouting in the grouting holes.
9. The protecting method according to claim 3, wherein the step of subjecting the inner wall of the concrete structure to the corrosion-proof and water-proof treatment in step (3) comprises:
constructing a modified resin corrosion-resistant waterproof layer system on the inner wall of the concrete structure to form a corrosion-resistant waterproof layer;
the modified resin corrosion-resistant waterproof layer system sequentially comprises: a permeable resin bottom coating, a resin daub middle coating and a resin closed surface coating;
wherein the permeable resin base coat is an epoxy resin layer;
the raw materials for preparing the resin daub middle coating comprise: epoxy resin, a curing agent, first powder, water and optional auxiliary agents; the mass ratio of the epoxy resin to the curing agent is 1: 1.4-1.8; relative to 1 part by weight of the mixture of the epoxy resin and the curing agent, the dosage of the first powder is 1.5-1.8 parts, the dosage of water is 0.05-0.3 part, and the dosage of the auxiliary agent is 0-5 parts; based on the total weight of the first powder, the first powder comprises 80-90 wt% of quartz powder, 10-20 wt% of micro silicon powder, 0.05-0.2 wt% of carbon black and 0.05-0.2 wt% of titanium dioxide, and the sum of the components is 100 wt%;
the raw materials for preparing the resin sealing surface coating comprise: epoxy resin, a curing agent, second powder, water and optional auxiliary agents; the mass ratio of the epoxy resin to the curing agent is 1: 1.4-1.8; relative to 10 parts by weight of the mixture of the epoxy resin and the curing agent, the using amount of the second powder is 1.5-2.5 parts, the using amount of the water is 2-3 parts, and the using amount of the auxiliary agent is 0-2 parts; the second powder comprises mica powder, carbon black and titanium dioxide, and the mass ratio of the mica powder to the carbon black to the titanium dioxide is 1: 1: 0.05-0.1.
10. Use of the method of protection according to any one of claims 3 to 9 in the field of protection of concrete structures.
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