CN108409246B - C30 concrete material resisting marine corrosion environment, preparation method and application - Google Patents

C30 concrete material resisting marine corrosion environment, preparation method and application Download PDF

Info

Publication number
CN108409246B
CN108409246B CN201810336711.4A CN201810336711A CN108409246B CN 108409246 B CN108409246 B CN 108409246B CN 201810336711 A CN201810336711 A CN 201810336711A CN 108409246 B CN108409246 B CN 108409246B
Authority
CN
China
Prior art keywords
concrete material
water
marine
concrete
mineral powder
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.)
Active
Application number
CN201810336711.4A
Other languages
Chinese (zh)
Other versions
CN108409246A (en
Inventor
华渊
徐倩
李勇良
连俊英
李连海
刘文化
李成业
王英杰
王利军
万芹
徐敦敏
吕洪涛
陈锋
彭应辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangnan University
Original Assignee
Jiangnan University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Jiangnan University filed Critical Jiangnan University
Priority to CN201810336711.4A priority Critical patent/CN108409246B/en
Publication of CN108409246A publication Critical patent/CN108409246A/en
Application granted granted Critical
Publication of CN108409246B publication Critical patent/CN108409246B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04—Portland cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/24—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
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention discloses a C30 concrete material for resisting the action of marine erosion environment, which comprises continuous graded broken stone, medium and coarse river sand, composite mineral powder, ordinary portland cement or portland cement and a high-efficiency water reducing agent. The C30 concrete material is prepared by adding water, stirring, compacting, molding and standard curing. Wherein the addition amount of the composite mineral powder reaches 70% of the total mass of the cementing material, the total conductive quantity C value is less than or equal to 600 coulombs, the strength loss rate of 100 times of sulfate dry-wet cycle is less than or equal to 18%, and the mass loss rate is less than or equal to 4%; the impervious grade is higher than P18, no potential alkali aggregate reaction danger exists, the reinforcement protection performance is excellent, the crack resistance is strong, and the defects of the traditional concrete material can be effectively overcome. The concrete is a main concrete material of structures such as pile foundations, bearing platforms, piers and the like in a marine environment, particularly in seawater or historically in a bridge engineering structure in the marine environment, and can generally directly bear the action of seawater.

Description

C30 concrete material resisting marine corrosion environment, preparation method and application
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a C30 concrete material with marine erosion environment resistance, a preparation method and application.
Background
The same place of the foundation facilities of inland areas such as coastal or coastal areas, particularly municipal works, bridge works, ports and docks, tunnel works, house building works and the like which are directly contacted with seawater or have historically been seawater environments is that reinforced concrete materials are adopted as main structural materials, the biggest difference is that the requirements of the foundation facilities engineering which are directly contacted with seawater or have historically been seawater environments in the coastal or coastal areas on the concrete materials are higher, the concrete materials mainly have stronger capacities of resisting chloride ion permeation, resisting sulfate crystal expansion, bearing seawater scouring, resisting freeze-thaw cycles, resisting pressure water permeation and the like, and the concrete materials are required to have excellent long-term performance and durability in order to ensure the safety and stability of reinforced concrete structures. In order to improve the long-term performance and durability of concrete, concrete materials used in inland areas or in traditional marine environments often adopt active methods of reducing the cement consumption, adding active mixed materials, adding high-efficiency water reducing agents to reduce unit water consumption and the like, or passive methods of coating protective materials on the surface of a structure and the like, and certain effect is achieved. When the active mixture is added into concrete, the active mixture is generally fly ash, ground blast furnace granulated slag and silicon powder, and is singly or doubly doped, the addition amount of the active mixture is not more than 40% of the total amount of the cementing material, the design strength grade is about C30-C50, the total electric conductivity C value is 800-1200 coulombs, and the chloride ion permeation resistance and the sulfate crystallization resistance are seriously insufficient. The design life of a structural project in a seawater environment or an inshore environment or a historical marine environment, particularly a cross-sea bridge, a submarine tunnel, a wharf of a sea-facing port and other infrastructure projects is generally 100 years, and obviously, the traditional marine concrete material cannot meet the requirements.
Disclosure of Invention
The invention aims to provide a C30 concrete material which has no potential alkali aggregate reaction danger, excellent reinforcement protection performance and strong crack resistance and resists the action of marine erosion environment, a preparation method and application aiming at the defects of the existing marine concrete material.
In order to achieve the purpose, the invention adopts the following technical scheme:
a C30 concrete material for resisting marine erosion environment comprises continuous graded broken stone, medium coarse river sand, composite mineral powder, ordinary portland cement or portland cement, and high-efficiency water reducing agent;
the method is characterized in that: the volume ratio of the continuous graded broken stone in the C30 concrete material is 0.395-0.410 m3/m3The volume ratio of the medium coarse river sand is 0.280-0.290 m3/m3The volume ratio of the cement is 0.0360-0.0370 m3/m3The volume ratio of the composite mineral powder is 0.0980-0.0985 m3/m3The volume ratio of water is 0.148-0.152 m3/m3The volume ratio of the voids or pores is 0.003-0.004 m3/m3。
It is further characterized in that: the composite mineral powder is compounded by levigated blast furnace granulated slag and first-level fly ash, and the main chemical components of the composite mineral powder comprise CaO and SiO2、Al2O3And Fe2O3(ii) a The cement is ordinary portland cement or portland cement, the strength grade is not lower than 42.5MPa, the total content of dicalcium silicate and tricalcium silicate is not lower than 70%, the content of tricalcium aluminate is not higher than 8%, and the content of alkali is not higher than 0.6%.
Further: the continuous graded broken stone is limestone broken stone with the particle size of 5-25 mm; the medium coarse river sand is clean river sand with fineness modulus of 2.6-3.0 continuous gradation; the high-efficiency water reducing agent is a polycarboxylate water reducing agent, and the water reducing rate is not lower than 25%; the water is tap water or clean application water.
The apparent density of the C30 concrete material is 2420-2440 Kg/m3The design strength grade is 30MPa, the bending strength is 4.5-5.5 MPa, and the total conductive quantity C is less than or equal to 600 coulombs.
The preparation method of the C30 concrete material for resisting the action of marine erosion environment is characterized by comprising the following steps:
(1) firstly, premixing continuous graded broken stone, medium coarse river sand, 50% of cement, composite mineral powder and water for 1-2 min;
(2) and then stirring the rest cement, water and all water reducers in the pre-mixed concrete in a double-roller forced stirrer for 2-3min to prepare the concrete mixture.
The mixture is mechanically transported, pumped or automatically flowed; mechanically vibrating and manually modifying; and maintaining in a natural maintenance mode or a heat storage maintenance mode.
The application of the C30 concrete material for resisting the action of marine erosion environment is characterized in that: the C30 concrete material is used for reinforced concrete structural members such as underwater cast-in-place piles, bearing platforms, piers and the like in marine environments or offshore environments or bridge engineering structures which are historically marine environments.
According to the invention, the proportion of the ground blast furnace granulated slag and the first-level fly ash is adjusted, the quality of the slag and the fly ash is controlled, the proportion of the composite mineral powder in the cementing material is improved, the material stirring and feeding procedure and the stirring time are changed, and the purpose of greatly improving the long-term performance and the durability of the marine concrete is realized. The addition amount of the composite mineral powder reaches 70% of the total mass of the cementing material, the total conductive quantity C value is less than or equal to 600 coulombs, the strength loss rate of 100 times of sulfate dry-wet cycle is less than or equal to 18%, and the mass loss rate is less than or equal to 4%; the anti-permeability grade is greater than P18, potential alkali aggregate reaction danger is avoided, and the reinforcement protection performance is excellent; the 56d and 90d standard anti-cracking test pieces have no cracks and have strong anti-cracking capability. Can effectively solve the defects of the traditional concrete material.
Detailed Description
A C30 concrete material for resisting the corrosion of sea, offshore or historical marine environment is composed of serially graded broken stone, coarse river sand, composite ore powder, ordinary or silicate cement and efficient water-reducing agent. The concrete material is prepared by adding water, stirring, compacting, forming and standard curing, and is a main concrete material for structures such as pile foundations, bearing platforms, piers and the like in a bridge engineering structure in ocean or offshore or historical ocean environments.
The continuous graded broken stone is limestone broken stone with the particle size of 5-25 mm. The medium coarse river sand is clean river sand with a fineness modulus of 2.6-3.0 continuous gradation. The composite mineral powder is compounded with fine granulated blast furnace slag and first-stage flyash and has CaO and SiO as main chemical components2、Al2O3、Fe2O3And the like. The cement is ordinary portland cement or portland cement, the strength grade is not lower than 42.5MPa, the total content of dicalcium silicate and tricalcium silicate is not lower than 70%, the content of tricalcium aluminate is not more than 8%, and the alkali content is not more than 0.6%. The high-efficiency water reducing agent is a polycarboxylate water reducing agent, and the water reducing rate is not lower than 25%. The water is tap water or clean application water.
The volume ratio of the broken stones in the C30 concrete is 0.395-0.410 m3/m3The volume ratio of the medium coarse river sand is 0.280-0.290 m3/m3The volume ratio of the cement is 0.0360-0.0370 m3/m3The volume ratio of the composite mineral powder is 0.0980-0.0985 m3/m3The volume ratio of water is 0.148-0.152 m3/m3The volume ratio of the voids or pores is 0.003-0.004 m3/m3。
The composite mineral powder is compounded by levigated blast furnace granulated slag and first-level fly ash, and the addition amount reaches 70% of the total amount of the cementing material. The limestone broken stone, the medium coarse river sand and 50 percent of ordinary portland cement or portland cement, composite mineral powder and water are premixed for about 1min, and the rest ordinary portland cement, water and all polycarboxylate water reducing agents are stirred for about 2min in a double-roller forced stirrer.
The mixture is mechanically transported, pumped or automatically flowed; mechanically vibrating and manually modifying; and maintaining in a natural maintenance mode or a heat storage maintenance mode.
The apparent density of the concrete material for resisting the marine erosion environment is 2420-2440 Kg/m3The design strength grade is 30MPa, the bending strength is 4.5-5.5 MPa, the total conductive quantity C is less than or equal to 600 coulombs, and the seawater environment resistance capability is excellent.
The strength loss rate of the concrete material resisting the marine erosion environment effect in 100 times of sulfate dry-wet cycle is less than or equal to 18 percent, and the mass loss rate is less than or equal to 4 percent; the impervious grade is greater than S18, no potential alkali aggregate reaction danger exists, the reinforcement protection performance is excellent, and no crack appears in 56d and 90d standard crack-resistant test pieces.
The concrete material resisting the marine erosion environment has excellent long-term performance and durability, and is mainly used for reinforced concrete structural members such as underwater cast-in-place piles, bearing platforms, piers and the like in marine or offshore or historically marine bridge engineering structures.

Claims (6)

1. A C30 concrete material for resisting marine erosion environment comprises continuous graded broken stone, medium coarse river sand, composite mineral powder, ordinary portland cement or portland cement, and high-efficiency water reducing agent; the method is characterized in that: the volume ratio of the continuous graded broken stone in the C30 concrete material is 0.395-0.410 m3/m3The volume ratio of the medium coarse river sand is 0.280-0.290 m3/m3The volume ratio of the cement is 0.0360-0.0370 m3/m3The volume ratio of the composite mineral powder is 0.0980-0.0985 m3/m3The volume ratio of water is 0.148-0.152 m3/m3The volume ratio of the voids or pores is 0.003-0.004 m3/m3；
The composite mineral powder is compounded by levigated blast furnace granulated slag and first-level fly ash, and the main chemical components of the composite mineral powder comprise CaO and SiO2、Al2O3And Fe2O3(ii) a The cement strength grade is not lower than 42.5MPa, the total content of dicalcium silicate and tricalcium silicate is not lower than 70%, the content of tricalcium aluminate is not more than 8%, and the content of alkali is not more than 0.6%;
when the concrete material is prepared, the continuous graded broken stone, the medium coarse river sand, 50% of cement, composite mineral powder and water are premixed for 1-2 min; and then stirring the rest cement, water and all water reducers in the pre-mixed concrete in a double-roller forced stirrer for 2-3min to prepare the mixture.
2. The C30 concrete material for combating the effects of marine erosive environments of claim 1, wherein: the continuous graded broken stone is limestone broken stone with the particle size of 5-25 mm; the medium coarse river sand is clean river sand with fineness modulus of 2.6-3.0 continuous gradation; the high-efficiency water reducing agent is a polycarboxylate water reducing agent, and the water reducing rate is not lower than 25%; the water is tap water or clean drinking water.
3. The C30 concrete material for combating the effects of marine erosive environments of claim 2, wherein: the apparent density of the C30 concrete material is 2420-2440 Kg/m3The design strength grade is 30MPa, the bending strength is 4.5-5.5 MPa, and the total conductive quantity C is less than or equal to 600 coulombs.
4. A method for preparing the C30 concrete material for resisting the action of marine erosion environment according to any one of claims 1 to 3, characterized by comprising the following steps:
(1) firstly, premixing continuous graded broken stone, medium coarse river sand, 50% of cement, composite mineral powder and water for 1-2 min;
(2) and then stirring the rest cement, water and all water reducers in the pre-mixed concrete in a double-roller forced stirrer for 2-3min to prepare the mixture.
5. The method for preparing a concrete material C30 for resisting the action of marine erosive environments according to claim 4, characterized in that: the mixture is mechanically transported, pumped or automatically flowed; mechanically vibrating and manually modifying; and maintaining in a natural maintenance mode or a heat storage maintenance mode.
6. Use of a C30 concrete material according to any one of claims 1 to 5 for combating the effects of marine aggressive environments, characterized in that: the C30 concrete material is used for reinforced concrete structural members including underwater cast-in-place piles, bearing platforms and piers in bridge engineering structures in marine environments or offshore environments.
CN201810336711.4A 2018-04-16 2018-04-16 C30 concrete material resisting marine corrosion environment, preparation method and application Active CN108409246B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810336711.4A CN108409246B (en) 2018-04-16 2018-04-16 C30 concrete material resisting marine corrosion environment, preparation method and application

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810336711.4A CN108409246B (en) 2018-04-16 2018-04-16 C30 concrete material resisting marine corrosion environment, preparation method and application

Publications (2)

Publication Number Publication Date
CN108409246A CN108409246A (en) 2018-08-17
CN108409246B true CN108409246B (en) 2021-02-19

Family

ID=63135468

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810336711.4A Active CN108409246B (en) 2018-04-16 2018-04-16 C30 concrete material resisting marine corrosion environment, preparation method and application

Country Status (1)

Country Link
CN (1) CN108409246B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110698137B (en) * 2019-10-29 2021-01-05 江南大学 Air-tight concrete material and preparation method thereof
CN114835455A (en) * 2022-05-30 2022-08-02 中建西部建设北方有限公司 Low-carbon concrete and cementing material

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101269937A (en) * 2008-04-08 2008-09-24 中铁二局股份有限公司 Maritime work concrete and construction method
CN101525222A (en) * 2009-03-11 2009-09-09 徐州工程学院 High-performance marine sand concrete material
CN103288398A (en) * 2013-05-15 2013-09-11 宁波市高等级公路建设指挥部 High-performance machine-made sand marine concrete and preparation method thereof
CN104692730A (en) * 2015-02-16 2015-06-10 中交武汉港湾工程设计研究院有限公司 Fair-faced concrete and application thereof
KR101600776B1 (en) * 2015-06-18 2016-03-08 대로이엔씨(주) Cement concrete compositions and pavement construction method therewith
CN107540313A (en) * 2017-10-13 2018-01-05 武汉理工大学 A kind of ecological self-compacting concrete

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101269937A (en) * 2008-04-08 2008-09-24 中铁二局股份有限公司 Maritime work concrete and construction method
CN101525222A (en) * 2009-03-11 2009-09-09 徐州工程学院 High-performance marine sand concrete material
CN103288398A (en) * 2013-05-15 2013-09-11 宁波市高等级公路建设指挥部 High-performance machine-made sand marine concrete and preparation method thereof
CN104692730A (en) * 2015-02-16 2015-06-10 中交武汉港湾工程设计研究院有限公司 Fair-faced concrete and application thereof
KR101600776B1 (en) * 2015-06-18 2016-03-08 대로이엔씨(주) Cement concrete compositions and pavement construction method therewith
CN107540313A (en) * 2017-10-13 2018-01-05 武汉理工大学 A kind of ecological self-compacting concrete

Also Published As

Publication number Publication date
CN108409246A (en) 2018-08-17

Similar Documents

Publication Publication Date Title
CN103936373B (en) Maritime concrete
CN103253921B (en) Cement concrete preventing corrosion of chlorine salt and preparation method thereof
CN108409252A (en) A kind of regular tenacity high durability concrete and preparation method thereof
CN105819718B (en) Concrete high-strength admixture, cement mixture and non-autoclaved ultra-high-strength concrete product
KR101343803B1 (en) Concrete composition using the blast-furnace slag and method for the preparation thereof
CN111875321B (en) Underwater repair material based on seawater and coral sand and preparation method thereof
CN108409246B (en) C30 concrete material resisting marine corrosion environment, preparation method and application
CN105693121A (en) Maritime work Portland cement
CN110655365A (en) High-strength concrete with iron ore as aggregate and preparation method thereof
CN108484043A (en) It is a kind of to resist the C50 concrete materials of marosion environmental activity, preparation method and application
CN105271852A (en) Seawater erosion resistant sulphoaluminate cement
CN115403291A (en) Harbor concrete corrosion-resistant reinforcing agent and preparation method thereof
CN107857542B (en) Production method of marine cement wind wave resistant mortar
CN100453488C (en) Silicate cement
Rhodes Roman concrete for durable, eco-friendly construction–applications for tidal power generation, and protection against sea level rise
CN114716213A (en) Underwater grouting pile foundation anti-scouring early-strength grouting material and application
CN109553342B (en) Seawater-stirred cement-based cementing material
CN110451840B (en) Composite type compacting agent
KR101617723B1 (en) Waterproof and anticorrosive composition for concrete
CN107032714A (en) A kind of coastal structure cement of anti-corrosion and high strength and preparation method thereof
CN110194625B (en) Method for optimizing cement structure and improving corrosion resistance and permeability resistance of concrete
CN108840630A (en) high performance concrete
Bulgakov et al. High-performance concrete produced with locally available materials
CN104788056A (en) Reinforced grouting material
CN107986650B (en) Concrete cementing material

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant