CN110204274A - A kind of preparation method of the highly resistance sea water intrusion complex cement based on cementitious material - Google Patents
A kind of preparation method of the highly resistance sea water intrusion complex cement based on cementitious material Download PDFInfo
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- CN110204274A CN110204274A CN201910454718.0A CN201910454718A CN110204274A CN 110204274 A CN110204274 A CN 110204274A CN 201910454718 A CN201910454718 A CN 201910454718A CN 110204274 A CN110204274 A CN 110204274A
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- sea water
- cementitious material
- water intrusion
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- highly resistance
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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
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The preparation method of the invention discloses a kind of highly resistance sea water intrusion complex cement based on cementitious material；It is mainly grouped as by following group as mass fraction: according to portland cement 30-40%, fine granularity slag powders 20-45%, coarseness powder 15-30%, metakaolin 2-7%, zeolite 5-15%, gypsum 5-9%.Portland cement sill early strength of the invention is higher, later strength sustainable growth, and there is excellent resistant to sea water erosiveness, such as 3 days compression strength is greater than 24MPa, 28 days compression strength is greater than 52.5MPa, 28 days corrosion resistance of chloride ion coefficients less than 0.6 × 10‑12m2/ s, 28 days resistant to sea water erosion factors are greater than 1.2.Highly resistance sea water intrusion complex cement of the invention is applied to the demanding field of resistant to sea water erosion performance.
Description
Technical field
The present invention relates to cement material more particularly to a kind of systems of the highly resistance sea water intrusion complex cement based on cementitious material
Preparation Method.
Background technique
With the propulsion of national marine development strategy, ocean engineering is largely built, and the complex cement for fighting sea water intrusion needs
The amount of asking increasingly increases.Existing method preparation resistant to sea water corrodes complex cement and needs to mix a large amount of high activities, the complementary glue of high fineness
Gel material, the according to national standards requirement of GB/T 31289-2014 " marine worker portland cement ", slag powders, flyash in cement
Amount to 50-70% with silicon ash dosage.High quality flyash and silicon ash yield are less in China, neighboring area, the South Sea, it is difficult to meet anti-
Sea water intrusion complex cement production requirement.Simultaneously it should be noted that the high-activity components such as clinker, slag contain in complex cement
There are a large amount of coarse granules, cause whole degree of hydration low, causes the waste of gelling property.To reduce highly resistance sea water intrusion Compound Water
Mud production cost and difficulty can realize that cementitious material efficiently utilizes by giving full play to the hydration characteristics of cementitious material, thus
It reduces resistant to sea water and corrodes demand of the complex cement to high-quality cementitious material, while improving region low activity material or inertia material
Expect utilization rate.
From cement slurry composition, structural point, closely knit structure and good harmful ion ability to cure are to improve
The necessary condition of resistant to sea water erosiveness.The initial bulk density of particle is higher when cement slurry degree of hydration is identical, paste structure
It is more closely knit；Hydrated product internal surface area is bigger, and physical adsorption chloride ion ability is stronger, and hydrated product containing aluminium contains in hydrated product
The raising of amount is then conducive to improve chemosetting chloride ion ability.The strength of cement master known to cement granules gradation and hydrated theory
It to be provided by middle granularity cementitious material；Fine granularity cementitious material refines cement slurry by hole caused by filling coarse granule accumulation
Aperture, while playing the retardation to harmful ion；The particle packing of coarseness cementitious material then forms the bone of cement slurry
Frame support structure, aquation efficiency influence cement slurry compaction rate and harmful ion ability to cure smaller.
Summary of the invention
The shortcomings that it is an object of the invention to overcome the above-mentioned prior art and deficiency provide a kind of height based on cementitious material
The preparation method of resistant to sea water erosion complex cement.The present invention gives full play to the filling effect and aquation efficiency of cementitious material, realizes
The efficient utilization of cementitious material, while significantly improving complex cement resistant to sea water erosiveness.
The present invention is achieved through the following technical solutions:
A kind of preparation method of the highly resistance sea water intrusion complex cement based on cementitious material, mainly by pressing mass fraction below
The component of meter mixes composition: portland cement 30-40%, fine granularity slag powders 20-45%, coarseness powder 15-30%, higher
Ridge soil 2-7%, zeolite 5-15%, gypsum 5-9%.
Portland cement sill early strength of the invention is higher, later strength sustainable growth, and resists with excellent
Sea water intrusion ability, such as 3 days compression strength are greater than 24MPa, 28 days compression strength is greater than 52.5MPa, 28 days corrosion resistance of chloride ion
Coefficient is less than 0.6 × 10-12m2/ s, 28 days resistant to sea water erosion factors are greater than 1.2.Highly resistance sea water intrusion complex cement of the invention
Applied to the demanding field of resistant to sea water erosion performance.
The Blain specific surface 320-380m of the portland cement2/ kg, partial size are small greater than 45 μm of volumetric solid concentration
In 20%, volumetric solid concentration of the partial size less than 8 μm is less than 15%.It is big that 3 days compression strength is greater than 27MPa, 28 days compression strength
In 57MPa.
The Blain specific surface 520-600m of the fine granularity slag powders2/ kg, partial size are greater than 20 μm of volumetric solid concentration
Less than 10%, volumetric solid concentration of the partial size less than 5 μm is greater than 20%.It is big that 3 days activity indexs are greater than 90%, 28 day activity index
In 120%.
The coarseness powder is that (low activity) cementitious material (such as flyash, steel slag and/or ferronickel slag) or inertia are filled out
Expect (such as agstone and/or siliceous mountain flour), it is characterized in that Blain specific surface 180-250m2/ kg, partial size are greater than 60 μm
Volumetric solid concentration of the volumetric solid concentration less than 20%, partial size less than 30 μm is less than 20%.28 days activity indexs are greater than 60%,
Content of MgO is less than 15%.
Described 3-5 μm of metakaolin average grain diameter.3 days activity indexs are greater than 95%, and activity index is greater than 110% within 28 days.
The present invention compared with the existing technology, have following advantages and effects
Based on grain composition model and cementitious material hydrated theory, present invention gained highly resistance sea water intrusion complex cement slurry
Initial bulk density is high, and the later period is lasting, efficient aquation, therefore can guarantee that highly resistance sea water intrusion complex cement is assisted in large dosage
Property cementitious material, especially low activity cementitious material even inert material incorporation after still have compared with high early strength and sustainable development
Later strength.
The efficient utilization for realizing different activities cementitious material, the coarseness powder skeletal support effect in playing cement slurry
On the basis of, it ensure that the mechanical property of highly resistance sea water intrusion complex cement by the degree of hydration of granularity portland cement in improving
Can, while fine granularity slag powders being made to play a part of to refine aperture, closely knit slurry, finally improve the complementary gelling material of different activities
The utilization efficiency of material.
The chemical bonding and physical adsorption chloride ion ability of complex cement are respectively increased using metakaolin and zeolite, guarantees
Highly resistance sea water intrusion complex cement has outstanding corrosion resistance.
Highly resistance sea water intrusion cement is prepared using a large amount of low activity cementitious materials even inert material, is region low activity
Cementitious material or the resource utilization of inert material provide approach, have significant environmental benefit.
Pass through the reasonably combined to prepare ocean engineering high resistance to corrosion cement, chlorine ion binding capacity system of different activities cementitious material
Several requirements for being much better than existing cement for construction in sea national standard with resistant to sea water erosion factor, can increase substantially the durable of ocean engineering
Property with structure service life, there is significant economic benefit, while reducing the carrying capacity of environment in ocean engineering complete period.
Specific embodiment
The present invention is described in further detail below with reference to embodiment, embodiments of the present invention are not limited thereto.
The highly resistance sea water intrusion complex cement efficiently utilized based on cementitious material of the invention includes using portland cement,
Fine granularity slag powders, coarseness powder, gypsum, metakaolin and zeolite；The present invention mixes each component according to a certain ratio
It is even.
Different cementitious material granularity requirements, mass fraction shared by activity index and its content are as shown in table 1.Different component grain
Degree, activity index and mass fraction can fluctuate within the specified scope, it is desirable that the sum of each component mass fraction is 100%.
1 different component granularity requirements of table and mass fraction
Remarks: "/" expression is not required this index.
Embodiment 1:
The highly resistance sea water intrusion complex cement efficiently utilized in the present embodiment based on cementitious material, mainly by coarseness fine coal
Ash, portland cement, fine granularity slag powders, metakaolin, zeolite and gypsum composition；Each component mass content and the present embodiment
The highly resistance sea water intrusion complex cement performance test of preparation is as shown in table 2.
A kind of highly resistance sea water intrusion complex cement efficiently utilized based on cementitious material of table 2 matches when performance
Embodiment 2:
The highly resistance sea water intrusion complex cement efficiently utilized in the present embodiment based on cementitious material, mainly by coarseness lime
Mountain flour, portland cement, fine granularity slag powders, metakaolin, zeolite and gypsum composition；Each component mass content and this implementation
The highly resistance sea water intrusion complex cement performance test of example preparation is as shown in table 3.
A kind of highly resistance sea water intrusion complex cement efficiently utilized based on cementitious material of table 3 matches when performance
Embodiment 3:
The highly resistance sea water intrusion complex cement efficiently utilized in the present embodiment based on cementitious material, mainly by coarseness bastard coal
Stone, portland cement, fine granularity slag powders, metakaolin, zeolite and gypsum composition；Each component mass content and the present embodiment
The highly resistance sea water intrusion complex cement performance test of preparation is as shown in table 4.
A kind of highly resistance sea water intrusion complex cement efficiently utilized based on cementitious material of table 4 matches when performance
Above-described embodiment is some embodiments of the present invention, but embodiments of the present invention are not by the limit of above-described embodiment
System, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (6)
1. a kind of preparation method of the highly resistance sea water intrusion complex cement based on cementitious material, it is characterised in that mainly by pressing below
The component of mass fraction meter mixes composition: portland cement 30-40%, fine granularity slag powders 20-45%, coarseness powder 15-
30%, metakaolin 2-7%, zeolite 5-15%, gypsum 5-9%.
2. the preparation method of the highly resistance sea water intrusion complex cement based on cementitious material, feature exist according to claim 1
In the Blain specific surface 320-380m of portland cement2/ kg, volumetric solid concentration of the partial size greater than 45 μm is less than 20%, grain
Volumetric solid concentration of the diameter less than 8 μm is less than 15%.
3. the preparation method of the highly resistance sea water intrusion complex cement based on cementitious material, feature exist according to claim 2
In the Blain specific surface 520-600m of fine granularity slag powders2/ kg, partial size greater than 20 μm of volumetric solid concentration less than 10%,
Volumetric solid concentration of the partial size less than 5 μm is greater than 20%.
4. the preparation method of the highly resistance sea water intrusion complex cement based on cementitious material, feature exist according to claim 3
In coarseness powder be cementitious material or inert filler, it is characterized in that Blain specific surface 180-250m2/ kg, partial size are greater than 60 μ
Volumetric solid concentration of the volumetric solid concentration of m less than 20%, partial size less than 30 μm is less than 20%.
5. the preparation method of the highly resistance sea water intrusion complex cement based on cementitious material, feature exist according to claim 4
In cementitious material be flyash, steel slag and/or ferronickel slag；Inert filler is agstone and/or siliceous mountain flour.
6. the preparation method of the highly resistance sea water intrusion complex cement based on cementitious material, feature exist according to claim 1
In 3-5 μm of metakaolin average grain diameter.
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Cited By (3)
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|---|---|---|---|---|
| CN110563351A (en) * | 2019-10-16 | 2019-12-13 | 河海大学 | Cement-based material for improving chloride ion binding rate and preparation method thereof |
| CN112624720A (en) * | 2020-12-31 | 2021-04-09 | 广州建设工程质量安全检测中心有限公司 | High-chlorine ion corrosion resistance auxiliary cementing material and preparation method thereof |
| CN114044635A (en) * | 2021-11-15 | 2022-02-15 | 中建西部建设湖南有限公司 | Composite cement, cement prefabricated member, preparation method and application thereof |
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| CN114044635A (en) * | 2021-11-15 | 2022-02-15 | 中建西部建设湖南有限公司 | Composite cement, cement prefabricated member, preparation method and application thereof |
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