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 PDF

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Publication number
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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CN
China
Prior art keywords
parts
seawater
sea sand
chloride ion
cement
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Pending
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CN201910808919.6A
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Chinese (zh)
Inventor
卢亦焱
李杉
梁鸿骏
王思雨
刘真真
李娜
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Wuhan University WHU
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Wuhan University WHU
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Priority to CN201910808919.6A priority Critical patent/CN110498656A/en
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions 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
    • C04B28/06Aluminous cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20Resistance against chemical, physical or biological attack
    • C04B2111/24Sea water resistance

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

Seawater sea sand cement-base composite material of curing of chloride ion and preparation method thereof
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.
CN201910808919.6A 2019-08-29 2019-08-29 Seawater sea sand cement-base composite material of curing of chloride ion and preparation method thereof Pending CN110498656A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113620622A (en) * 2021-09-08 2021-11-09 山西大学 Method for efficiently fixing chloride ions in basic magnesium sulfate cement

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101239792A (en) * 2008-03-12 2008-08-13 中南大学 Additive for increasing cement-base material solidifying dissociative chlorine ion capability and applying method thereof
CN103253911A (en) * 2013-04-24 2013-08-21 中国石油大学(北京) Ocean-engineering anti-erosion cement-based composite material
CN104276777A (en) * 2014-09-12 2015-01-14 河海大学 Chloride ion immobilizing agent
CN105541236A (en) * 2016-02-04 2016-05-04 中国建筑材料科学研究总院 Seawater-sea sand concrete
CN108002785A (en) * 2018-02-02 2018-05-08 天津城建大学 A kind of modified seawater marine sand concrete
CN108947412A (en) * 2018-09-05 2018-12-07 河海大学 A kind of ecology resistance anti-corrosion maritime concrete of rust type seawater sea sand and preparation method thereof
CN109809778A (en) * 2019-03-28 2019-05-28 武汉大学 Super hardening modified PVA fiber reinforcement sea sand cement-base composite material and preparation method thereof
CN109824288A (en) * 2019-03-19 2019-05-31 武汉理工大学 A kind of cement-based material chlorine-solidifying agent and preparation method thereof
CN110054452A (en) * 2018-12-27 2019-07-26 中山大学 A kind of seawater sea sand fire resisting corrosion resistant concrete and preparation method thereof

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101239792A (en) * 2008-03-12 2008-08-13 中南大学 Additive for increasing cement-base material solidifying dissociative chlorine ion capability and applying method thereof
CN103253911A (en) * 2013-04-24 2013-08-21 中国石油大学(北京) Ocean-engineering anti-erosion cement-based composite material
CN104276777A (en) * 2014-09-12 2015-01-14 河海大学 Chloride ion immobilizing agent
CN105541236A (en) * 2016-02-04 2016-05-04 中国建筑材料科学研究总院 Seawater-sea sand concrete
CN108002785A (en) * 2018-02-02 2018-05-08 天津城建大学 A kind of modified seawater marine sand concrete
CN108947412A (en) * 2018-09-05 2018-12-07 河海大学 A kind of ecology resistance anti-corrosion maritime concrete of rust type seawater sea sand and preparation method thereof
CN110054452A (en) * 2018-12-27 2019-07-26 中山大学 A kind of seawater sea sand fire resisting corrosion resistant concrete and preparation method thereof
CN109824288A (en) * 2019-03-19 2019-05-31 武汉理工大学 A kind of cement-based material chlorine-solidifying agent and preparation method thereof
CN109809778A (en) * 2019-03-28 2019-05-28 武汉大学 Super hardening modified PVA fiber reinforcement sea sand cement-base composite material and preparation method thereof

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
冯跃等: "焙烧水滑石对砂浆中氯离子渗透的影响", 《硅酸盐通报》 *
欧阳东等: "双掺海砂混凝土的性能研究", 《混凝土》 *
莫利伟等: "粉煤灰和矿粉双掺对水泥基材料固化氯离子能力的研究", 《硅酸盐通报》 *
陈友治等: "高掺量矿物掺合料对水泥基材料固化氯离子能力的影响", 《硅酸盐通报》 *
马保国等: "苯丙乳液对水泥基材料氯离子固化能力的影响", 《硅酸盐通报》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113620622A (en) * 2021-09-08 2021-11-09 山西大学 Method for efficiently fixing chloride ions in basic magnesium sulfate cement

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