CN110498656A - Seawater sea sand cement-base composite material of curing of chloride ion and preparation method thereof - Google Patents
Seawater sea sand cement-base composite material of curing of chloride ion and preparation method thereof Download PDFInfo
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- CN110498656A CN110498656A CN201910808919.6A CN201910808919A CN110498656A CN 110498656 A CN110498656 A CN 110498656A CN 201910808919 A CN201910808919 A CN 201910808919A CN 110498656 A CN110498656 A CN 110498656A
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- seawater
- sea sand
- chloride ion
- cement
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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
-
- 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
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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 invention discloses seawater sea sand cement-base composite materials of a kind of curing of chloride ion and preparation method thereof.It proposes using having material on the islands and reefs such as sea sand and seawater, with cement, slag, flyash, high efficiency water reducing agent, nanometer Al2O3, magnalium hydrotalcite, the combinations of materials such as styrene-acrylic emulsion, configure a kind of cement material and the chloride ion in seawater sea sand can be solidified, meet the needs of building marine engineering.It by weight include following components: 450~650 parts of sulphate aluminium cement, 190~280 parts of seawater, 560~810 parts of sea sand, 270~390 parts of ground slag, 180~260 part, nanometer Al of flyash2O318~26 parts, 76~110 parts of magnalium hydrotalcite, 27~39 parts of styrene-acrylic emulsion, 5~10 parts of high efficiency water reducing agent.The present invention is gathered materials on the spot using the sea sand easily obtained, seawater material, realization, is reduced engineering material freight volume, is reducingd the construction costs, and building time is saved.And using the method for number of ways combination curing, the content for carrying free chloride ion in seawater sea sand is greatly lowered, while can guarantee the compactness of material, prevents internal steel bar corrosion.
Description
Technical field
The present invention relates to the field of building materials, in particular to a kind of seawater sea sand cement-base composite materials of curing of chloride ion
And preparation method thereof.
Background technique
China has a vast territory possesses numerous islands, for the building on island, lacks sand, stone and freshwater resources, but gather around
There are sea sand resources abundant.Island building is needed to expend a large amount of manpower and material resources if using traditional concrete material and carries out material
Material transport.If seawater sea sand resources can be utilized directly, transport of materials amount can be greatly lowered, speed is built in raising, is saved
About cost.But the villaumite in sea sand will affect the hydration process of portland cement, especially have corrosion to the reinforcing bar in concrete
Effect, magnesium ion, sulfate ion can also cause certain harm to the durability of concrete.Due to unreasonable use or abuse
Sea sand, there is serious concrete quality in the countries and regions such as Japan, Britain, China and TaiWan, China in early days and reinforcing bar is rotten
Erosion problem, especially under the sudden load action such as earthquake, marine sand concrete structure may seem more fragile.Numerous failures
Experience have shown that abusing or abuse sea sand has very big risk, but after science understands the characteristic of sea sand and marine sand concrete,
Sea sand can be by reasonable resource utilization.
At present in China's building trade, the sea sand after desalt processing can be put into use.And sea sand at this stage
The method of processing mainly has fresh water douche, river sand to be used in mixed way method and natural placement methods.The process of usual desalt processing compares
Complexity, and a large amount of manpower and material resources can be expended, increase the cost of construction, is not suitable for large-scale use in engineering.If but without
Processing is crossed, then can bring more greatly economic loss.Therefore, on existing Research foundation, a kind of construction method letter need to be proposed
It is single feasible, it can significantly alleviate the influence of chloride ion in seawater sea sand, should also have the advanced composite material (ACM) of certain economy, it is full
Sufficient engineering demand.
Summary of the invention
In view of the deficiencies of the prior art, the main purpose of the present invention is to provide a kind of seawater sea sand water of curing of chloride ion
Cement-based composite material and preparation method thereof.Marine resources are made full use of, by the material applications such as seawater, sea sand to concreting
In, and by physical solidification and the method for chemosetting, significantly alleviate in seawater sea sand and carries free chloride ion to reinforcing bar
The influence of concrete structure proposes a kind of preparation method of the seawater sea sand cement-base composite material of curing of chloride ion.It is such new
Profile material can satisfy the engineering demand of marine building, and greatly alleviate resource pressure, save building cost.
To achieve the purpose of the present invention, one aspect of the present invention provide a kind of curing of chloride ion seawater sea sand cement base it is compound
Material, which is characterized in that including following components:
450~650 parts of sulphate aluminium cement, 190~280 parts of seawater, 560~810 parts of sea sand, ground slag 270~390
Part, 180~260 part, nanometer Al of flyash2O318~26 parts, 76~110 parts of magnalium hydrotalcite, 27~39 parts of styrene-acrylic emulsion, height
5~10 parts of water-reducing agent of effect.
Another aspect of the present invention provides a kind of preparation method of the seawater sea sand cement-base composite material of curing of chloride ion, adopts
The method being used in combination with physical solidification and chemosetting, by mixing mineral admixture, nanometer Al2O3, magnalium hydrotalcite, benzene
Four kinds of approach combination curing chloride ions of acrylic emulsion, chloride ion ability to cure in seawater sea sand cement-base composite material is improved
12%-15%；It is comprised the following steps:
(1) by sulphate aluminium cement, sea sand, ground blast furnace slag, flyash, nanometer Al2O3, magnalium hydrotalcite is sufficiently mixed simultaneously
Stirring 3~5 minutes, obtains the first mixture；The miberal powder is granulated blast-furnace miberal powder micro mist, and product hierarchy is S95 grades；The powder
Coal ash is aluminous fly-ash, and alumina content is greater than 37%；
(2) styrene-acrylic emulsion, high efficiency water reducing agent are added in seawater, are stirred evenly after being sufficiently mixed, obtain the second mixing
Object；
(3) the second mixture obtained in step (2) is added in the first mixture obtained in step (1), sufficiently
It is stirred 3~5 minutes after mixing, obtains a kind of seawater sea sand cement-base composite material of curing of chloride ion；The composite material with
Mass parts meter, component are as follows: 450~650 parts of sulphate aluminium cement, 190~280 parts of seawater, 560~810 parts of sea sand, ground slag
270~390 parts, 180~260 part, nanometer Al of flyash2O318~26 parts, 76~110 parts of magnalium hydrotalcite, styrene-acrylic emulsion 27~
39 parts, 5~10 parts of high efficiency water reducing agent.
It advantages of the present invention and has the beneficial effect that:
The seawater sea sand cement-base composite material of curing of chloride ion of the invention, it is excellent to obtain performance by adjusting match ratio
Cement-based material more.Keep concrete structure more closely knit by the dosage and incorporation ground blast furnace slag that change cementitious material, also can
Prevent external chloride ion from entering.Simultaneously by physical solidification, the combination curing method of chemosetting come the freedom in curing materials
Chloride ion, alleviate seawater sea sand directly using cause armored concrete be easy corrosion the problem of.
Physical solidification and the method for chemosetting use simultaneously, to obtain better solidification effect.Physical solidification is mainly
Refer to that hydrated products curing of chloride ion by way of physical absorption, the chemosettings such as C-S-H gel refer to chloride ion and other
Product reaction generates new compound.Based on principles above, the ingredient of cement-base composite material is adjusted, obtains meeting and want
The composite material asked.
Flyash is mixed into composite material, and combines the use of sulphate aluminium cement, and cement matrix can be effectively reduced
The concentration of free chloride ion in material, improves the compactness of pore structure.Fly ash grain is larger, is in hollow ball-shape structure, compares table
Area is larger, is not only able to adsorb a large amount of free chloro ions, is also beneficial to flyash and secondary reaction of hydration occurs.What reaction generated
C-S-H gel and drated calcium aluminate can generate F salt in conjunction with chloride ion, play the role of curing of chloride ion.In addition, C-S-H gel
It, also can absorbed portion chloride ion because it is with biggish surface energy.
Ground slag powder and nanometer Al2O3Incorporation, can be improved activity Al in system2O3Content produces hydrated cementitious
AFt or AFm solidify the chloride ion in marine sand concrete, form F salt and K salt.Contain higher Al in ground slag powder2O3, energy
Preferably carry out secondary hydration.In addition, the secondary reaction of hydration of mineral admixture can push hydrated cementitious, it is raw in gelling system
At more hydrated products, facilitate fill concrete hole, increase the compactness of concrete, to improve the anti-chlorine of concrete
Ion penetrating power.
Magnalium hydrotalcite is a kind of inorganic powder materials with Anion-adsorption ability, have biggish specific surface area and
Aperture is easily accepted by guest molecule, is often used as adsorbent, and the absorption that being added in marine sand concrete can effectively improve to chloride ion is made
With free chloride ion content in reduction system.
Organic chloride ion curing materials styrene-acrylic emulsion is added in the above system, styrene-acrylic emulsion can promote hydrated cementitious raw
At the free chloride ion in more C-S-H gel adsorption cement, chloride ion physical absorption rate is improved.And cement can be promoted
The generation of F salt and K salt in sill, makes chloride ion participate in forming stable hydrated product, improves chloride ion chemosetting rate.
Two aspect effects are lower so that styrene-acrylic emulsion can be improved cement to the curing degree of chloride ion after being added in cement.
Free chloride ion in seawater sea sand cement-base composite material can be greatly lowered in the above number of ways combination curing
Content, while guaranteeing the compactness of seawater sea sand cement-base composite material, it prevents external rapidly entering for chloride ion and causes steel
Muscle corrosion, utmostly to delay internal steel bar corrosion, enables seawater, sea sand to be applied directly in most of engineering.This
The novel composite material of kind is not only able to satisfy engineering demand, moreover it is possible to greatly reduce building cost, economize on resources.
Specific embodiment
Below with reference to embodiment, the present invention will be further described.
Embodiment one
The preparation method of the seawater sea sand cement-base composite material of curing of chloride ion of the invention, concrete operations are as follows:
(1) by 450 parts of sulphate aluminium cements, 560 parts of sea sands, 270 parts of ground blast furnace slags, 180 parts of flyash, 18 parts of nanometers
Al2O3, 76 parts of magnalium hydrotalcites be sufficiently mixed and stir 3~5 minutes, obtain the first mixture；
(2) 27 parts of styrene-acrylic emulsions, 5 parts of high efficiency water reducing agents are added in 190 parts of seawater, are stirred evenly after being sufficiently mixed,
Obtain the second mixture；
(3) the second mixture obtained in step (2) is added in the first mixture obtained in step (1), sufficiently
It is stirred 3~5 minutes after mixing, obtains a kind of seawater sea sand cement-base composite material of curing of chloride ion
Performance test: compared with pure water cement-based material, this kind of material solidification chloride ion performance improves 11.2%
Embodiment two
The preparation method of the seawater sea sand cement-base composite material of curing of chloride ion of the invention, concrete operations are as follows:
(1) by 550 parts of sulphate aluminium cements, 685 parts of sea sands, 330 parts of ground blast furnace slags, 220 parts of flyash, 22 parts of nanometers
Al2O3, 93 parts of magnalium hydrotalcites be sufficiently mixed and stir 3~5 minutes, obtain the first mixture；
(2) 33 parts of styrene-acrylic emulsions, 7.5 parts of high efficiency water reducing agents are added in 250 parts of seawater, are stirred after being sufficiently mixed equal
It is even, obtain the second mixture；
(3) the second mixture obtained in step (2) is added in the first mixture obtained in step (1), sufficiently
It is stirred 3~5 minutes after mixing, obtains a kind of seawater sea sand cement-base composite material of curing of chloride ion
Performance test: compared with pure water cement-based material, this kind of material solidification chloride ion performance improves 17.9%
Embodiment three
The preparation method of the seawater sea sand cement-base composite material of curing of chloride ion of the invention, concrete operations are as follows:
(1) by 650 parts of sulphate aluminium cements, 810 parts of sea sands, 390 parts of ground blast furnace slags, 260 parts of flyash, 26 parts of nanometers
Al2O3, 110 parts of magnalium hydrotalcites be sufficiently mixed and stir 3~5 minutes, obtain the first mixture；
(2) 39 parts of styrene-acrylic emulsions, 10 parts of high efficiency water reducing agents are added in 280 parts of seawater, are stirred evenly after being sufficiently mixed,
Obtain the second mixture；
(3) the second mixture obtained in step (2) is added in the first mixture obtained in step (1), sufficiently
It is stirred 3~5 minutes after mixing, obtains a kind of seawater sea sand cement-base composite material of curing of chloride ion.
Performance test: compared with pure water cement-based material, this kind of material solidification chloride ion performance improves 14.6%.
Claims (2)
1. a kind of seawater sea sand cement-base composite material of curing of chloride ion, it is characterised in that: in terms of mass parts, including with the following group
Point: 450~650 parts of sulphate aluminium cement, 190~280 parts of seawater, 560~810 parts of sea sand, 270~390 parts of ground slag, powder
180~260 part, nanometer Al of coal ash2O318~26 parts, 76~110 parts of magnalium hydrotalcite, 27~39 parts of styrene-acrylic emulsion and efficiently subtract
5~10 parts of aqua.
2. a kind of method for the seawater sea sand cement-base composite material for preparing curing of chloride ion as described in claim 1, feature
It is: the method being used in combination using physical solidification and chemosetting, by mixing mineral admixture, nanometer Al2O3, magnalium water
Four kinds of talcum, styrene-acrylic emulsion approach combination curing chloride ions, by chloride ion ability to cure in seawater sea sand cement-base composite material
Improve 12%-15%；It is comprised the following steps:
(1) by sulphate aluminium cement, sea sand, ground blast furnace slag, flyash, nanometer Al2O3, magnalium hydrotalcite is sufficiently mixed and stirs 3
~5 minutes, obtain the first mixture；The miberal powder is granulated blast-furnace miberal powder micro mist, and product hierarchy is S95 grades；The flyash
For aluminous fly-ash, alumina content is greater than 37%；
(2) styrene-acrylic emulsion, high efficiency water reducing agent are added in seawater, are stirred evenly after being sufficiently mixed, obtain the second mixture；
(3) the second mixture obtained in step (2) is added in the first mixture obtained in step (1), is sufficiently mixed
It stirs 3~5 minutes afterwards, obtains the seawater sea sand cement-base composite material of curing of chloride ion；The seawater sea of the curing of chloride ion
For sand cement based composites in terms of mass parts, component is as follows: 450~650 parts of sulphate aluminium cement, 190~280 parts of seawater, sea
560~810 parts of sand, 270~390 parts of ground slag, 180~260 part, nanometer Al of flyash2O318~26 parts, magnalium hydrotalcite
76~110 parts, 27~39 parts of styrene-acrylic emulsion and 5~10 parts of high efficiency water reducing agent.
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Cited By (3)
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| CN113620622A (en) * | 2021-09-08 | 2021-11-09 | 山西大学 | Method for efficiently fixing chloride ions in basic magnesium sulfate cement |
| CN116177977A (en) * | 2022-12-30 | 2023-05-30 | 辽宁瑞丰新型建材有限公司 | Low-chloride ion leaching gypsum mortar and preparation method thereof |
| CN117069457A (en) * | 2023-09-06 | 2023-11-17 | 盐城工学院 | Sea sand cement mortar with long-term stable mechanical property and preparation method thereof |
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| CN116177977A (en) * | 2022-12-30 | 2023-05-30 | 辽宁瑞丰新型建材有限公司 | Low-chloride ion leaching gypsum mortar and preparation method thereof |
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| CN117069457B (en) * | 2023-09-06 | 2024-05-14 | 盐城工学院 | Sea sand cement mortar with long-term stable mechanical property and preparation method thereof |
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Application publication date: 20191126 |