CN116905422A - Concrete crack control method - Google Patents
Concrete crack control method Download PDFInfo
- Publication number
- CN116905422A CN116905422A CN202310634099.XA CN202310634099A CN116905422A CN 116905422 A CN116905422 A CN 116905422A CN 202310634099 A CN202310634099 A CN 202310634099A CN 116905422 A CN116905422 A CN 116905422A
- Authority
- CN
- China
- Prior art keywords
- concrete
- surface layer
- control method
- pouring
- crack control
- 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.)
- Pending
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 30
- 210000000481 breast Anatomy 0.000 claims abstract description 23
- 239000002344 surface layer Substances 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 238000010276 construction Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims abstract description 5
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 4
- 238000009736 wetting Methods 0.000 claims abstract description 4
- 239000000835 fiber Substances 0.000 claims description 12
- -1 polypropylene Polymers 0.000 claims description 10
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- 239000003349 gelling agent Substances 0.000 claims description 8
- 239000004743 Polypropylene Substances 0.000 claims description 7
- 230000007797 corrosion Effects 0.000 claims description 7
- 238000005260 corrosion Methods 0.000 claims description 7
- 229920001155 polypropylene Polymers 0.000 claims description 7
- 239000003112 inhibitor Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 5
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000011398 Portland cement Substances 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- 238000005187 foaming Methods 0.000 claims description 3
- 239000010410 layer Substances 0.000 claims description 3
- 229920005646 polycarboxylate Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 239000002352 surface water Substances 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims 1
- 238000005457 optimization Methods 0.000 description 6
- 230000003628 erosive effect Effects 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000010220 ion permeability Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/06—Moles; Piers; Quays; Quay walls; Groynes; Breakwaters ; Wave dissipating walls; Quay equipment
- E02B3/068—Landing stages for vessels
-
- 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
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/06—Macromolecular compounds fibrous
- C04B16/0616—Macromolecular compounds fibrous from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B16/065—Polyacrylates; Polymethacrylates
- C04B16/0658—Polyacrylonitrile
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/06—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against corrosion by soil or water
-
- 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
- C04B2111/24—Sea water resistance
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant 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
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Ocean & Marine Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Hydrology & Water Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of port construction, and particularly discloses a concrete crack control method for a construction process of a wharf breast wall structure, wherein the breast wall comprises a wall body for ship berthing and a surface layer required to bear load, and the concrete crack control method comprises the following steps of: respectively reinforcing bars by taking the wall body and the surface layer as two independent structures according to design requirements, so that the breast wall actually forms a reinforced concrete slab with an upper reinforcing bar structure and a lower reinforcing bar structure; building a template on the basis; watering and wetting the templates and the steel bars, and pouring concrete after the exposed water on the templates and the steel bars is fully dispersed; layering pouring and secondary vibrating when pouring the surface layer; trowelling operation is carried out before initial setting of the concrete; constructing an expansion joint and filling an expansion joint filling material; and curing the concrete. The concrete crack control method provided by the invention can effectively reduce the generation of crack and improve the structural strength of the breast wall.
Description
Technical Field
The invention relates to the technical field of port construction, in particular to a concrete crack control method.
Background
The port, also called a wharf, is a transportation hub located along the coast of sea, river, lake and reservoir and provided with amphibious transportation equipment and conditions for the safe entry and exit and berthing of ships, and can be divided into three types of gravity type wharfs, high pile type wharfs and plate pile type wharfs according to different structural forms.
The breast wall is the superstructure of gravity type pier, belong to the bulky concrete member, the effect is with wall prefabricated component link into an entirety, bear various loads such as wave force, boats and ships mooring force etc. that are used in the sign indicating number head, consequently, the breast wall crack is the ubiquitous construction quality defect of gravity type pier, because the breast wall is in the water level change district, wet and dry alternates, receive sea water, atmospheric corrosion, in case the crackle appears, can accelerate the corrosion of reinforcement in the wall, consequently reduce the wholeness and the durability of breast wall structure, consequently, it is very necessary to improve the structural strength of pier breast wall, reduce the formation of crackle crack.
Disclosure of Invention
In order to solve the technical problems in the background technology, the invention provides a concrete crack control method and a use method.
The concrete crack control method is used for the construction process of a wharf breast wall structure, wherein the breast wall comprises a wall body for ship berthing and a surface layer required to bear load, and specifically comprises the following steps of:
s1, taking a wall body and a surface layer as two independent structures and respectively reinforcing bars according to design requirements, so that a breast wall actually forms a reinforced concrete slab with an upper-lower reinforcing bar structure;
s2, building a template on the basis of the S1;
s3, watering and wetting the templates and the steel bars, and pouring concrete after the surface water on the templates and the steel bars is sufficiently dispersed;
s4, pouring in layers and performing secondary vibration when pouring the surface layer;
s5, trowelling operation is carried out before initial setting of the concrete;
s6, constructing the expansion joint and filling an expansion joint filling material;
s7, curing the concrete.
As a further optimization of the above scheme, the concrete adopts Portland cement with the strength grade not lower than 42.5, coarse aggregate and fine aggregate with continuous grading, and is doped with a gelling agent, a water reducing agent, a corrosion inhibitor and polyacrylonitrile fiber.
As a further optimization of the scheme, the fine aggregate selects middle sand with fineness of 2.6-3.2, and the coarse aggregate selects stone particles with grain size of not more than 2.4 times of self length and not less than 0.4 times of self thickness.
As a further optimization of the scheme, the polycarboxylate water reducer is selected.
As a further optimization of the scheme, the dosage of the gelling agent is 400kg/m 3 。
As a further optimization of the scheme, the concrete of the pouring surface layer is also doped with polypropylene fibers, and the dosage of the polypropylene fibers is 0.9kg/m 3 。
As a further optimization of the above scheme, the expansion joint filling material adopts a low-foaming polyethylene foam board.
1. According to the concrete crack control method provided by the invention, the wall body and the reinforcing steel bars in the surface layer are independently configured to form a layered structure, so that the impact force is not directly applied to the opposite side when the wall body or the surface layer is impacted, the possibility of mutual coupling of the impact force or the load breast wall is greatly reduced, and the structural strength of the breast wall is improved.
2. According to the concrete crack control method provided by the invention, the steel bars and the templates are wetted by water before concrete pouring, so that the reduction of the molding quality and strength of the concrete caused by the fact that the templates absorb water in the concrete can be prevented.
3. According to the concrete crack control method provided by the invention, the water reducer can enable concrete to have better workability, the gelling agent can enable concrete to have good workability, and the corrosion inhibitor and the polyacrylonitrile fiber have excellent chloride ion permeability resistance and sulfate erosion resistance, so that seawater erosion resistance is realized, and the durability of a concrete structure is effectively improved.
4. According to the concrete crack control method provided by the invention, polypropylene fibers are added into concrete when the surface layer is poured, so that the tensile strength is improved, and meanwhile, secondary vibration can prevent and eliminate concrete shaping cracks and improve the bonding strength of the reinforcing steel bars and the concrete, so that the strength performance of the breast wall surface layer is improved.
Drawings
Fig. 1 is a schematic flow chart of a concrete crack control method according to the present invention.
Detailed Description
The concrete crack control method is used in the construction process of a wharf breast wall structure, the breast wall is an upper structure of a gravity wharf, and the concrete crack control method belongs to a large-volume concrete member and comprises a wall body for ship berthing and a surface layer required to bear load.
Referring to fig. 1, the method specifically includes the steps of:
s1, taking a wall body and a surface layer as two independent structures and respectively reinforcing bars according to design requirements, so that a breast wall actually forms a reinforced concrete slab with an upper-lower reinforcing bar structure;
s2, building a template on the basis of the S1;
s3, watering and wetting the templates and the steel bars, and pouring concrete after the surface water on the templates and the steel bars is sufficiently dispersed;
s4, pouring in layers and performing secondary vibration when pouring the surface layer;
s5, trowelling operation is carried out before initial setting of the concrete;
s6, constructing the expansion joint and filling an expansion joint filling material;
s7, curing the concrete.
More specifically, the concrete used in S3 adopts Portland cement with a strength grade not lower than 42.5, coarse aggregate and fine aggregate with continuous grading, and is mixed with a gelling agent, a water reducing agent, a corrosion inhibitor and polyacrylonitrile fiber.
The silicate cement has low hydration heat and long setting time, so that the heat released in the process of increasing the strength of the concrete is low, and the temperature difference between the inside and the outside of the concrete is small, so that the temperature crack is avoided.
The fine aggregate selects the middle sand with fineness of 2.6-3.2, and the coarse aggregate selects the stone particles with the length of not more than 2.4 times of particle size and the thickness of not less than 0.4 times of particle size.
The polycarboxylate water reducer is selected, and can be matched with cement for long plastic retention time, so that the concrete has better workability.
The amount of the gelling agent is 400kg/m 3 The gelling agent can provide concrete with good workability.
The corrosion inhibitor and the polyacrylonitrile fiber have excellent chloride ion permeability resistance and sulfate erosion resistance, so that seawater erosion resistance is realized, and the durability of the concrete structure is effectively improved.
Polypropylene fiber is also doped into the concrete of the pouring surface layer, and the dosage of the polypropylene fiber is 0.9kg/m 3 。
The expansion joint filling material adopts the low-foaming polyethylene foam board, and has good effect in the expansion joint due to wider density range, perfect heat preservation and insulation, smaller water absorption, extremely low water vapor permeability, excellent impact absorption and higher mechanical strength.
According to the concrete crack control method provided by the embodiment, the wall body and the reinforcing steel bars in the surface layer are independently configured to form a layered structure, so that impact force is not directly applied to the opposite side when the wall body or the surface layer is impacted, the possibility of mutual coupling of the impact force or the load breast wall is greatly reduced, and the structural strength of the breast wall is improved.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (7)
1. The concrete crack control method is used for the construction process of a wharf breast wall structure, and the breast wall comprises a wall body for ship berthing and a surface layer required to bear load, and is characterized by comprising the following steps:
s1, taking a wall body and a surface layer as two independent structures and respectively reinforcing bars according to design requirements, so that a breast wall actually forms a reinforced concrete slab with an upper-lower reinforcing bar structure;
s2, building a template on the basis of the S1;
s3, watering and wetting the templates and the steel bars, and pouring concrete after the surface water on the templates and the steel bars is sufficiently dispersed;
s4, pouring in layers and performing secondary vibration when pouring the surface layer;
s5, trowelling operation is carried out before initial setting of the concrete;
s6, constructing the expansion joint and filling an expansion joint filling material;
s7, curing the concrete.
2. The method for controlling concrete cracks according to claim 1, wherein the concrete is made of Portland cement with a strength grade of not less than 42.5, and coarse and fine aggregates of continuous gradation, and is mixed with a gelling agent, a water reducing agent, a corrosion inhibitor and polyacrylonitrile fiber.
3. The method according to claim 2, wherein the fine aggregate is selected from the group consisting of medium sand having a fineness of 2.6 to 3.2, and the coarse aggregate is selected from the group consisting of stone particles having a grain size of not more than 2.4 times the length thereof and a grain size of not less than 0.4 times the thickness thereof.
4. The method for controlling concrete cracks according to claim 2, wherein the water reducing agent is a polycarboxylate water reducing agent.
5. The concrete crack control method as claimed in claim 2, wherein the amount of the gelling agent is 400kg/m 3 。
6. The method for controlling concrete cracks according to claim 2, wherein the concrete of the casting surface layer is further doped with polypropylene fiber, and the amount of the polypropylene fiber is 0.9kg/m 3 。
7. The method for controlling concrete cracks according to claim 1, wherein the expansion joint filling material is a low foaming polyethylene foam board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310634099.XA CN116905422A (en) | 2023-05-31 | 2023-05-31 | Concrete crack control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310634099.XA CN116905422A (en) | 2023-05-31 | 2023-05-31 | Concrete crack control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116905422A true CN116905422A (en) | 2023-10-20 |
Family
ID=88361697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310634099.XA Pending CN116905422A (en) | 2023-05-31 | 2023-05-31 | Concrete crack control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116905422A (en) |
-
2023
- 2023-05-31 CN CN202310634099.XA patent/CN116905422A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Han et al. | Smart and multifunctional concrete toward sustainable infrastructures | |
| US4588443A (en) | Shaped article and composite material and method for producing same | |
| CA1190947A (en) | Shaped article and composite material and method for producing same | |
| JP7362083B2 (en) | 3D printing concrete of coastal irregular structure, processing process and application | |
| CN103936373B (en) | Maritime concrete | |
| CN101549976B (en) | Concrete mixing proportion for deposition tube tunneltron segment | |
| Lu | Recent advances in high strength lightweight concrete: From development strategies to practical applications | |
| CN101823858B (en) | Self-compacting concrete | |
| KR100954144B1 (en) | Hifg strength light weight concrete | |
| CN108409243B (en) | Constraint pipe cast-in-place pile for underground sulfate erosion environment and preparation method thereof | |
| CN104402390B (en) | Water permeability concrete barrier board and preparation method thereof | |
| CN110387878B (en) | Preparation process of inner-layer permeation-resistant corrosion-resistant concrete prefabricated square pile | |
| CN108298913A (en) | Pile for prestressed pipe and preparation method thereof suitable for underground sulfate corrosion environment | |
| CN111321733A (en) | Composite foundation bearing structure for placing precast pile in cement soil mixing pile | |
| CN101672037A (en) | Bayer process red mud solidified damming and piling method | |
| CN117486570A (en) | Solidified soil, precast pile and method for preparing precast pile by solidified soil | |
| CN108914734A (en) | High tensile pervious concrete sandwich structure and preparation method | |
| CN116905422A (en) | Concrete crack control method | |
| CN207032918U (en) | The ruggedized construction of sea sand reinforced beam | |
| CN113374127A (en) | Construction method of thin-wall steel concrete shear wall | |
| CN112813930A (en) | Construction method for constructing overflow weir surface based on overflow weir body and combined template and overflow weir | |
| CN101275408A (en) | High durability inorganic gel material surface layer and construction method thereof | |
| CN205088677U (en) | Low hollow side of prestressed concrete stake of high performance | |
| CN214461609U (en) | Sandwich heat-preservation recycled concrete composite floor structure | |
| CN118110154B (en) | Multiple solid waste synergistic reinforcing soft foundation structure, mold and preparation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication |