CN108409246A - It is a kind of to resist the C30 concrete materials of marosion environmental activity, preparation method and application - Google Patents
It is a kind of to resist the C30 concrete materials of marosion environmental activity, preparation method and application Download PDFInfo
- Publication number
- CN108409246A CN108409246A CN201810336711.4A CN201810336711A CN108409246A CN 108409246 A CN108409246 A CN 108409246A CN 201810336711 A CN201810336711 A CN 201810336711A CN 108409246 A CN108409246 A CN 108409246A
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- Prior art keywords
- water
- marosion
- concrete materials
- concrete
- resisting
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Classifications
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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
- C04B28/04—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
Abstract
The invention discloses a kind of C30 concrete materials for resisting marosion environmental activity, including continuous grading rubble, in thick river sand, complex slag, Portland cement or portland cement, high efficiency water reducing agent.By adding, agitated water, closely knit molding, standard curing is made the C30 concrete materials.The addition content of wherein complex slag reaches the 70% of cementitious material gross mass, and total electric conduction quantity C values are less than or equal to 600 coulombs, and the loss of strength rate of 100 sulfoxylate drying and watering cycles is less than or equal to 18%, and mass loss rate is less than or equal to 4%；Seepage-resistant grade is more than P18, and without the danger of potential alkali-aggregate reaction, the steel protection property is excellent, and anti-crack ability is strong, can effectively solve insufficient and defect existing for conventional concrete material.It is the main concrete material for being especially in seawater or be in history the works such as science of bridge building structure pile foundation, cushion cap, bridge pier under marine environment under marine environment, generally can directly bears the effect of seawater.
Description
Technical field
The invention belongs to building material technical fields, mixed more particularly to a kind of C30 resisting marosion environmental activity
Solidifying soil material, preparation method and application.
Background technology
Coastal or border on the sea area is especially in direct contact with seawater or is in history municipal works, the bridge work of briny environment
Journey, port and pier, Tunnel Engineering, house construction engineering are equal to the infrastructure of hinterland, and mutually to exist together be to be all made of armored concrete material
Material is used as primary structural material, maximum to be especially in direct contact with seawater difference lies in coastal or border on the sea area or be in history
Requirement higher of the infrastructure project of briny environment to concrete material is mainly shown as and resists chloride permeability, resists sulphur
Hydrochlorate crystallographic expansion bears that seawater scouring, to resist Frozen-thawed cycled, the ability of renitency water penetration etc. stronger, to ensure reinforcing bar
The safety of concrete structure, stability, it is desirable that concrete material has excellent long-term behaviour and endurance quality.Inland basin
Concrete material used under area or traditional marine environment, to improve the long-term behaviour and endurance quality of concrete, frequently with logical
It crosses reduction cement consumption, add active addition, addition high efficiency water reducing agent to reduce the active methods such as unit consumption of water, or
The passive approach such as works external coating protective materials, achieve certain effect.When using the admixture activity mixing in concrete
When material, generally flyash, ground blast furnace Granulated slag, silica flour are singly mixed or double-doped, and the addition content of activity mixing admixture does not surpass
The 40% of binder total amount, design strength grade C30 ~ C50 or so are crossed, total electric conduction quantity C values resist chlorine at 800 ~ 1200 coulombs
Ion permeates and sulphate crystal ability wretched insufficiency.To being marine environment in briny environment or close-shore environment or in history
The infrastructure projects such as Structural Engineering, especially bridge spanning the sea, seabed tunnel, the port and pier that border on the sea, it is 100 to be typically designed the service life
Year, it is clear that traditional maritime concrete material cannot be met the requirements.
Invention content
Present invention aims at the defects for existing maritime concrete material, provide a kind of without potential alkali-aggregate reaction danger
Danger, the steel protection property is excellent, the C30 concrete materials of the strong resistance marosion environmental activity of anti-crack ability, preparation method and application.
The present invention to achieve the above object, adopts the following technical scheme that：
A kind of C30 concrete materials for resisting marosion environmental activity, including continuous grading rubble, in thick river sand, grandidierite
Powder, Portland cement or portland cement, high efficiency water reducing agent；
It is characterized in that：Continuous grading rubble volume fraction described in the C30 concrete materials is 0.395 ~ 0.410m3/m3, in
The volume fraction of thick river sand is 0.280 ~ 0.290m3/m3, the volume fraction of cement is 0.0360 ~ 0.0370 m3/m3, complex slag
Volume fraction is 0.0980 ~ 0.0985 m3/m3, the volume fraction of water is 0.148 ~ 0.152 m3/m3, the volume fraction of gap or hole is
0.003~0.004m3/m3。
It is further characterized by：The complex slag is combined by ground blast furnace Granulated slag and level-one flyash,
Its main chemical compositions includes CaO, SiO2、Al2O3And Fe2O3；The cement be Portland cement or portland cement, by force
It spends grade and is not less than 42.5MPa, the total content of dicalcium silicate and tricalcium silicate is not less than 70%, and the content of tricalcium aluminate is not more than
8%, alkali content is not more than 0.6%.
Further：The continuous grading rubble is 5 ~ 25mm of grain size, lime stone matter rubble；Thick river sand is fineness in described
The clean river sand of 2.6 ~ 3.0 continuous grading of modulus；The high efficiency water reducing agent is polycarboxylate dehydragent, and water-reducing rate is not less than 25%；
The water is tap water or the application water of cleaning.
The apparent density of the C30 concrete materials is 2420 ~ 2440Kg/m3, design strength grade is 30MPa, bending resistance
Intensity is in 4.5 ~ 5.5MPa, total electric conduction quantity C≤600 coulomb.
A kind of preparation method of the C30 concrete materials of above-mentioned resistance marosion environmental activity, it is characterised in that packet
Include following step：
（1）First by continuous grading rubble, in the cement, complex slag and water of thick river sand and 50% dosage carry out the pre- mixs of 1-2min；
（2）Remaining cement, water, whole water-reducing agents are stirred in two pairs of rollers forced mixer in the concrete of pre- mix again
2-3min is prepared into concrete mix.
The mix uses mechanical transport, pumpdown or gravity flow operation；Machinery vibrates, is manually modified；Naturally it supports
Shield or the mode of regenerative conservation are conserved.
A kind of application of the C30 concrete materials of above-mentioned resistance marosion environmental activity, it is characterised in that：It is described
C30 concrete materials are the underwater filling in the science of bridge building structure of marine environment for marine environment or paralic environment or in history
Note the reinforced concrete structures such as stake, cushion cap, bridge pier.
The present invention is by adjusting the ratio of ground blast furnace Granulated slag and level-one flyash, the product of control slag and flyash
Matter improves ratio of the complex slag in cementitious material, changes material stirring dosing procedure and mixing time, realizes and substantially carry
The long-term behaviour of high maritime concrete and the purpose of endurance quality.The addition content of complex slag of the present invention reaches the total matter of cementitious material
The 70% of amount, total electric conduction quantity C values are less than or equal to 600 coulombs, and the loss of strength rate of 100 sulfoxylate drying and watering cycles is less than or equal to
18%, mass loss rate is less than or equal to 4%；Seepage-resistant grade is more than P18, and without the danger of potential alkali-aggregate reaction, the steel protection property is excellent；56d、
90d standard cracking resistance test specimen frees from flaw occur, and anti-crack ability is strong.It can effectively solve insufficient and scarce existing for conventional concrete material
It falls into.
Specific implementation mode
A kind of C30 concrete materials for resisting ocean or coastal waters or be in history marine environment corrosion function, including it is continuous
Graded broken stone, in thick river sand, complex slag, Portland cement or portland cement, high efficiency water reducing agent.The concrete material
Add water it is agitated, it is closely knit molding, standard curing be made, be ocean or coastal waters or in history be marine environment under science of bridge building
The main concrete material of the works such as structure pile foundation, cushion cap, bridge pier.
Continuous grading rubble is 5 ~ 25mm of grain size, lime stone matter rubble.In thick river sand be 2.6 ~ 3.0 continuous grade of fineness modulus
The clean river sand matched.Complex slag is combined by ground blast furnace Granulated slag and level-one flyash, and main chemical compositions are
CaO、SiO2、Al2O3、Fe2O3Deng.Cement is Portland cement or portland cement, and strength grade is not less than 42.5MPa,
The total content of dicalcium silicate and tricalcium silicate is not less than 70%, and the content of tricalcium aluminate is not more than 8%, and alkali content is not more than 0.6%.
High efficiency water reducing agent is polycarboxylate dehydragent, and water-reducing rate is not less than 25%.Water is tap water or the application water of cleaning.
The volume fraction of C30 concrete medium stones is 0.395 ~ 0.410m3/m3, in thick river sand volume fraction be 0.280 ~
0.290m3/m3, the volume fraction of cement is 0.0360 ~ 0.0370 m3/m3, the volume fraction of complex slag is 0.0980 ~ 0.0985
m3/m3, the volume fraction of water is 0.148 ~ 0.152 m3/m3, the volume fraction of gap or hole is 0.003 ~ 0.004m3/m3。
Complex slag is combined by ground blast furnace Granulated slag and level-one flyash, and addition content reaches binder total amount
70%.Lime stone matter rubble, in thick river sand carried out with 50% Portland cement or portland cement, complex slag and water
The pre- mixs of 1min or so, remaining Portland cement, water, whole polycarboxylate dehydragents stir in two pairs of rollers forced mixer
Mix 2min or so.
Mix uses mechanical transport, pumpdown or gravity flow operation；Machinery vibrates, is manually modified；Natural curing or
The mode of regenerative conservation is conserved.
The apparent density for resisting the concrete material of marosion environmental activity is 2420 ~ 2440Kg/m3, design strength etc.
Grade is 30MPa, and bending strength has excellent resistance briny environment effect in 4.5 ~ 5.5MPa, total electric conduction quantity C≤600 coulomb
Ability.
Resist marosion environmental activity 100 sulfoxylate drying and watering cycle of concrete material loss of strength rate be less than etc.
In 18%, mass loss rate is less than or equal to 4%；Seepage-resistant grade is more than S18, and without the danger of potential alkali-aggregate reaction, the steel protection property is excellent,
56d, 90d standard cracking resistance test specimen free from flaw occur.
The concrete material for resisting marosion environmental activity has excellent long-term behaviour and endurance quality, is mainly used for
Ocean or coastal waters are the reinforced concretes such as underwater cast-in-place pile, cushion cap, bridge pier under marine environment in science of bridge building structure in history
Soil structure part.
Claims (7)
1. a kind of C30 concrete materials for resisting marosion environmental activity, including continuous grading rubble, in thick river sand, compound
Miberal powder, Portland cement or portland cement, high efficiency water reducing agent；It is characterized in that：Described in the C30 concrete materials
Continuous grading rubble volume fraction is 0.395 ~ 0.410m3/m3, the volume fraction of thick river sand is 0.280 ~ 0.290m in described3/m3, water
The volume fraction of mud is 0.0360 ~ 0.0370 m3/m3, the volume fraction of complex slag is 0.0980 ~ 0.0985 m3/m3, the volume of water
Rate is 0.148 ~ 0.152 m3/m3, the volume fraction of gap or hole is 0.003 ~ 0.004m3/m3。
2. resisting the C30 concrete materials of marosion environmental activity as described in claim 1, it is characterised in that：It is described multiple
It closes miberal powder to be combined by ground blast furnace Granulated slag and level-one flyash, main chemical compositions include CaO, SiO2、Al2O3
And Fe2O3；The cement be Portland cement or portland cement, strength grade be not less than 42.5MPa, dicalcium silicate and
The total content of tricalcium silicate is not less than 70%, and the content of tricalcium aluminate is not more than 8%, and alkali content is not more than 0.6%.
3. resisting the C30 concrete materials of marosion environmental activity as claimed in claim 1 or 2, it is characterised in that：It is described
Continuous grading rubble is 5 ~ 25mm of grain size, lime stone matter rubble；Thick river sand is 2.6 ~ 3.0 continuous grading of fineness modulus in described
Clean river sand；The high efficiency water reducing agent is polycarboxylate dehydragent, and water-reducing rate is not less than 25%；The water is tap water or cleaning
Apply water.
4. resisting the C30 concrete materials of marosion environmental activity as claimed in claim 3, it is characterised in that：The C30
The apparent density of concrete material is 2420 ~ 2440Kg/m3, design strength grade is 30MPa, bending strength 4.5 ~
5.5MPa, total electric conduction quantity C≤600 coulomb.
5. a kind of preparation of C30 concrete materials according to any one of claims 1-4 that resisting marosion environmental activity
Method, it is characterised in that include the following steps：
（1）First by continuous grading rubble, in the cement, complex slag and water of thick river sand and 50% dosage carry out the pre- mixs of 1-2min；
（2）Remaining cement, water, whole water-reducing agents are stirred in two pairs of rollers forced mixer in the concrete of pre- mix again
2-3min is prepared into mix.
6. resisting the preparation method of the C30 concrete materials of marosion environmental activity as claimed in claim 5, feature exists
In：The mix uses mechanical transport, pumpdown or gravity flow operation；Machinery vibrates, is manually modified；Natural curing or storage
The mode of thermal curing is conserved.
7. a kind of application of C30 concrete materials as claimed in any one of claims 1 to 6 that resisting marosion environmental activity,
It is characterized in that：The C30 concrete materials are used for marine environment or paralic environment, are especially in direct contact with seawater or history
It is above marine environment, the reinforced concretes such as underwater cast-in-place pile, cushion cap, bridge pier in the science of bridge building structure of underground water and seawater homogeneity
Soil structure part.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810336711.4A CN108409246B (en) | 2018-04-16 | 2018-04-16 | C30 concrete material resisting marine corrosion environment, preparation method and application |
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| 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 |
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| CN108409246A true CN108409246A (en) | 2018-08-17 |
| CN108409246B CN108409246B (en) | 2021-02-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110698137A (en) * | 2019-10-29 | 2020-01-17 | 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 |
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| 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 |
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2018
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Patent Citations (6)
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| CN101269937A (en) * | 2008-04-08 | 2008-09-24 | 中铁二局股份有限公司 | Maritime work concrete and construction method |
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| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110698137A (en) * | 2019-10-29 | 2020-01-17 | 江南大学 | Air-tight concrete material and preparation method thereof |
| 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 |
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| CN108409246B (en) | 2021-02-19 |
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