CN108341606A - A kind of preparation method of functional form admixture - Google Patents

A kind of preparation method of functional form admixture Download PDF

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Publication number
CN108341606A
CN108341606A CN201810062656.4A CN201810062656A CN108341606A CN 108341606 A CN108341606 A CN 108341606A CN 201810062656 A CN201810062656 A CN 201810062656A CN 108341606 A CN108341606 A CN 108341606A
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Prior art keywords
cure
functional form
concrete
chloride ion
improving
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CN108341606B (en
Inventor
马保国
刘晓海
谭洪波
梅军鹏
姜文斌
张挺
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Wuhan University of Technology WUT
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Wuhan University of Technology WUT
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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
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02—Treatment
    • C04B20/023—Chemical treatment
    • 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
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02—Treatment
    • C04B20/04—Heat treatment
    • 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
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures

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

Abstract

The invention discloses a kind of preparation methods of functional form admixture.Include the following steps：Prepare the preprocessing solution containing potassium hydroxide, sodium hydroxide and triisopropanolamine；Sa ultra-fine grain is placed in above-mentioned preprocessing solution to impregnate, is warming up to 50~60 DEG C of 5~7h of heating；Separation sa ultra-fine grain is simultaneously cleaned with deionized water, is dried；Surface modifier is added and is uniformly mixed to get the functional form admixture for improving concrete chloride ion ability to cure.Functional form concrete admixture of the present invention accelerates the aluminium element dissolution rate of sa ultra-fine grain while increasing concrete aluminium element content, thus the generation by accelerating F salt, the concrete chloride ion ability to cure before significantly improving 28 days.

Description

A kind of preparation method of functional form admixture
Technical field
The invention belongs to building material fields, and in particular to a kind of function for improving concrete chloride ion ability to cure Type admixture and preparation method thereof.
Background technology
Armored concrete combines the advantage of concrete and reinforcing bar, simple for process, cheap, is widely used in engineering and builds Build field.But there is also its defects for reinforced concrete structure.In the research about concrete durability, chloride ion corrosion at For the most common reason of reinforced concrete structure failure.Chlorion reaches the corrosion that rebar surface can cause reinforcing bar, leads to steel Muscle fails, and eventually leads to concrete structure failure, causes great economic loss.
There are mainly two types of the sources of Chloride Ion in Concrete：When cement, aggregate when cast, in mixing water containing chlorine from Son；Second is that being penetrated into concrete in external environment, for instance in the concrete structure in marine environment, and contain chlorine The use of deicer salts.Concrete chloride ion solidification according to the present invention is then mainly in the chlorion of inside concrete.It is logical Physically or chemically mode is crossed, chlorion is cured, chlorion is prevented to be diffused in inside concrete, being finally reached prevents The purpose that reinforcing bar is rusted.
Chlorion cures in cement-based material is divided into two kinds of approach：One is physical absorptions, depend on aquation silicon Sour calcium gel, curing efficiency are relatively low；Another kind is chemical reaction, stable product is generated, such as F salt (Friedel salt) and K salt (Kuzel salt), curing efficiency is very high.Physical solidification is easy by gel calcium silicon ratio and solion species influence, and chemistry is solid Change more stable, the chlorion ability to cure of F salt is stronger in chemosetting mode.The chemical formula of Friedel salt is 3CaO Al2O3·CaCl2·10H2O, wherein containing a certain amount of aluminium element.It, can if aluminium content in cement-based material can be increased To increase F salt contents, chlorion curing degree is improved.
The chlorion ability to cure of concrete itself is relatively low, because generating hydrated calcium silicate gel physical solidification by cement Chlorion is less efficient.And the aluminium element that cement itself contains is relatively low, the F salt amounts generated in a manner of chemically reacting are seldom, therefore When cement is as single cementitious material, chlorion ability to cure is extremely limited.
As common mineral admixture, the chlorion curing performance of the two is each defective for miberal powder and flyash.In miberal powder Aluminium element content is relatively low, and the F salt contents of generation are few, therefore chlorion ability to cure is limited.Flyash early activity is relatively low, dissolution Aluminium element it is extremely limited, therefore cause the chlorion ability to cure of concrete early stage poor.And if chlorion if in early days Through starting to spread in concrete, and reach rebar surface, later stage concrete curing ability can not also play a role by force again.Therefore The chlorion curing performance that approach improves concrete early stage must be found, the wind of steel bar corrosion generation could be really effectively reduced Danger.
Invention content
Present invention aims at provide it is a kind of for improve concrete chloride ion ability to cure functional form admixture and its Preparation method.
In order to achieve the above objectives, using technical solution：
Functional form for improving concrete chloride ion ability to cure blends preparation method for material, includes the following steps：
1) preprocessing solution containing potassium hydroxide, sodium hydroxide and triisopropanolamine is prepared；
2) sa ultra-fine grain is placed in above-mentioned preprocessing solution to impregnate, is warming up to 50~60 DEG C of 5~7h of heating；
3) it detaches sa ultra-fine grain and is cleaned, dried with deionized water；
4) surface modifier is added and is uniformly mixed and is mixed to get the functional form for improving concrete chloride ion ability to cure Close material.
By said program, 0.4~0.6mol/L potassium hydroxide, 0.4~0.6mol/L hydrogen are included in the preprocessing solution Sodium oxide molybdena, 0.01~0.03mol/L triisopropanolamines.
By said program, the sa ultra-fine grain is to be formulated by slag, flyash and metakaolin；Wherein oxygen SiClx content is 30~50wt%, and alumina content is not less than 30wt%, and particle size range control is 5~30 μm.
By said program, silica content 30% in the slag, alumina content 20%, silica contains in flyash Amount 45%, alumina content 30%, metakaolin silica content 50%, alumina content 45%.
By said program, the surface modifier is technical grade white sugar or one kind in industrial glucose acid sodium or it is mixed Close object.
It is (8~12) that by said program, in step 2, liquid, which consolidates mass ratio,：1.
By said program, drying temperature is 100~105 DEG C in step 3.
By said program, surface modifier addition is 0.1~0.2wt% in step 4.
The present invention passes through the side of chemi-excitation and thermodynamics excitation by carrying out activation process to sa ultra-fine grain Formula improves sa particle aluminium element dissolution rate.By the way that under the higher temperature environment of setting, potassium hydroxide and hydrogen-oxygen is added Change sodium, form overbasic solution environmental, along with triisopropanolamine accelerates the aluminium on sa ultra-fine grain surface mutually to dissolve out Effect significantly increases aluminium phase stripping capacity of the sa ultra-fine grain in early stage, increases aluminium ion in cement-based material hole solution Content promotes F salt to generate, the final chlorion ability to cure for improving concrete early stage.
Simultaneously because can increase water requirement after concrete is added in view of functional form concrete admixture of the present invention, Therefore, surface modifier is added in design, meets workability of concrete requirement.
The present invention compared with the existing technology, has the beneficial effect that：
The chlorion ability to cure for significantly improving concrete early stage, allows concrete to start to migrate it in a large amount of chlorions It is preceding just to cure chlorion, stable F salt is formed, the possibility that chlorion reaches rebar surface is reduced, reduces chlorion corruption Lose the risk of reinforcing bar.
Functional form concrete admixture of the present invention accelerates sa while increasing concrete aluminium element content The aluminium element dissolution rate of ultra-fine grain, to by the generation for accelerating F salt, significantly improve the concrete chloride ion before 28 days Ability to cure.Opposite flyash and miberal powder, have higher early activity and aluminium element content, can significantly improve concrete Chlorion ability to cure.
Under the premise of ensureing concrete strength, functional form concrete admixture of the present invention is used, it is possible to reduce water Mud dosage improves workability of concrete.
Specific implementation mode
Following embodiment further illustrates technical scheme of the present invention, but not as limiting the scope of the invention.
Embodiment 1
1) solution is prepared, consisting of 0.4mol/L potassium hydroxide, tri- isopropyl of 0.4mol/L sodium hydroxides and 0.01mol/L Hydramine；
2) sa ultra-fine grain is placed in the solution of preparation and is impregnated, be placed in 50 DEG C of environment and heat 5 hours, liquid is solid Than being 8；The sa ultra-fine grain group becomes 20wt% slags, 50wt% flyash, 30wt% metakaolins, oxidation Silicone content is 43.5%, alumina content 32.5%, and granularity is 5-30 μm.
3) processed sa ultra-fine grain is cleaned 7 times with deionized water, and is dried at 105 DEG C；
4) technical grade white sugar is added, quality is the 0.1% of admixture total amount.
Embodiment 2
1) solution is prepared, consisting of 0.6mol/L potassium hydroxide, tri- isopropyl of 0.6mol/L sodium hydroxides and 0.03mol/L Hydramine；
2) sa ultra-fine grain is placed in the solution of preparation and is impregnated, be placed in 60 DEG C of environment and heat 7 hours, liquid is solid Than being 12；The sa ultra-fine grain group contains as 10% slag, 70% flyash, 20% metakaolin, silica Amount is 44.5%, alumina content 32%, and granularity is 5-30 μm.
3) processed sa ultra-fine grain is cleaned 5 times with deionized water, and is dried at 100 DEG C；
4) industrial glucose acid sodium is added, quality is the 0.2% of admixture total amount.
Embodiment 3
1) solution is prepared, consisting of 0.5mol/L potassium hydroxide, tri- isopropyl of 0.5mol/L sodium hydroxides and 0.02mol/L Hydramine；
2) sa ultra-fine grain is placed in the solution of preparation and is impregnated, be placed in 60 DEG C of environment and heat 6 hours, liquid is solid Than being 10；The sa ultra-fine grain group contains as 10% slag, 80% flyash, 10% metakaolin, silica Amount is 44%, alumina content 30.5%, and granularity is 5-30 μm.
3) processed sa ultra-fine grain is cleaned 6 times with deionized water, and is dried at 105 DEG C；
4) surface modifier is added, quality is the 0.2% of admixture total amount.The surface modifier is technical grade grape Sodium saccharate and technical grade white sugar, mass ratio 1:1.
It is each specific dosage parameter summary sheet of raw material in embodiment 1,2 and 3 in table 1.
Table 1
Embodiment 1 Embodiment 2 Embodiment 3
Chlorion cures admixture volume (%) 20 50 35
Concentration of potassium hydroxide (mol/L) 0.4 0.6 0.5
Naoh concentration (mol/L) 0.4 0.6 0.5
Triisopropanolamine concentration (mol/L) 0.01 0.03 0.02
Heating temperature (DEG C) 50 60 60
Heating time (h) 5 7 6
Liquid-solid ratio 8 12 10
Wash number 7 5 6
Drying temperature (DEG C) 105 100 105
Slag ratio (%) 20 10 10
Flyash ratio (%) 50 70 80
Metakaolin ratio (%) 30 20 10
Sa ultra-fine grain silica content (%) 43.5 44.5 44
Sa ultra-fine grain alumina content (%) 32.5 32 30.5
Surface modifier total amount (%) 0.1 0.2 0.2
Technical grade white sugar volume (%) 0.1 0 0.1
Industrial glucose acid sodium volume (%) 0 0.2 0.1
Application Example
Following Application Example is to contain chlorion inside simulation concrete, and by its cured experimentation.Concrete Chlorion curing degree is high, shows that more chlorions are cured by cement-based material, and free chloride ion is reduced, reinforcement in concrete by Risk to Chloride Attack reduces, and the durability of concrete gets a promotion.
Using sodium chloride as chlorion source, it is directly dissolved in mixing water and is added in concrete.Meanwhile in order to increase reality The comparative of result is tested, the chloride ion content for testing use is higher, and chlorine ion concentration is 0.5mol/L in mixing water.According to addition Sodium chloride quality the total chloridion content C in concrete can be calculatedt, then according to water-soluble in measuring concrete Free love chloride ion content Cf.Total chloridion content CtWith measuring free chloride ion content CfDifference it is as concrete curing Amount of chloride ions Cb。CbWith CtRatio, as chlorion curing degree.Wherein, water-soluble free chloride ion content C in concretef's It measures and uses water conservancy industry standard SL352-2006《Concrete for hydraulic structure testing regulations》.
In order to compare functional form admixture of the present invention and influence of the common admixture to the performance of concrete, it is provided with common Admixture contrasts group, and by taking flyash as an example, concrete making technology proportioning is shown in Table 2.Flyash silica content used is 51%, Alumina content 27%, fineness are 45 μm and tail over 9%.Functional form Admixture formulation in proportioning 2,4,6 is respectively above-mentioned implementation Formula described in example 1, embodiment 2 and embodiment 3.
Table 2
It is as shown in table 3 to the test result of the concrete indices of said ratio.
Table 3
In table 3, in comparison proportioning 2,4,6 with the property indices of proportioning 1,3,5 it could be assumed that, and it is common general Logical admixture, i.e. flyash is compared, of the present invention for improving concrete chloride ion ability to cure under identical volume The chlorion curing degree of concrete early stage greatly improved in functional form admixture, while improving intensity.Therefore of the present invention It is a kind of for improving the functional form mineral admixture of concrete chloride ion ability to cure, cure energy promoting concrete chloride ion There is significant effect in terms of power.

Claims (7)

1. the functional form for improving concrete chloride ion ability to cure blends preparation method for material, it is characterised in that including following step Suddenly：
1) preprocessing solution containing potassium hydroxide, sodium hydroxide and triisopropanolamine is prepared；
2) sa ultra-fine grain is placed in above-mentioned preprocessing solution to impregnate, is warming up to 50~60 DEG C of 5~7h of heating；
3) it detaches sa ultra-fine grain and is cleaned, dried with deionized water；
4) surface modifier is added and is uniformly mixed and is blended to get the functional form for improving concrete chloride ion ability to cure Material.
2. preparation method for material is blended for improving the functional form of concrete chloride ion ability to cure as described in claim 1, it is special Sign be in the preprocessing solution comprising 0.4~0.6mol/L potassium hydroxide, 0.4~0.6mol/L sodium hydroxides, 0.01~ 0.03mol/L triisopropanolamines.
3. preparation method for material is blended for improving the functional form of concrete chloride ion ability to cure as described in claim 1, it is special Sign is that the sa ultra-fine grain is formulated by slag, flyash and metakaolin；It is aoxidized in sa ultra-fine grain Silicone content is 30~50wt%, and alumina content is not less than 30wt%, and particle size range control is 5~30 μm.
4. preparation method for material is blended for improving the functional form of concrete chloride ion ability to cure as described in claim 1, it is special Sign is that the surface modifier is or mixtures thereof one kind in technical grade white sugar or industrial glucose acid sodium.
5. preparation method for material is blended for improving the functional form of concrete chloride ion ability to cure as described in claim 1, it is special It is (8~12) that sign, which is in step 2 that liquid consolidates mass ratio,：1.
6. preparation method for material is blended for improving the functional form of concrete chloride ion ability to cure as described in claim 1, it is special Sign is in step 3 that drying temperature is 100~105 DEG C.
7. preparation method for material is blended for improving the functional form of concrete chloride ion ability to cure as described in claim 1, it is special Sign is in step 4 that surface modifier addition is 0.1~0.2wt%.
CN201810062656.4A 2018-01-23 2018-01-23 A kind of preparation method of functional form admixture Expired - Fee Related CN108341606B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109250944A (en) * 2018-11-12 2019-01-22 武汉理工大学 A kind of zeolite-loaded type chloride ion curing agent and its preparation method and application
CN110171939A (en) * 2019-04-11 2019-08-27 武汉理工大学 A kind of sial phase chaotropic agent and its preparation method and application
CN110183150A (en) * 2019-04-11 2019-08-30 武汉理工大学 A kind of sa waste chloride ion curing agent and its preparation method and application
CN110204239A (en) * 2019-04-11 2019-09-06 武汉理工大学 A kind of lithium slag admixture and its preparation method and application

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104478287A (en) * 2014-12-29 2015-04-01 福建清源科技有限公司 Multifunctional concrete synergist and preparation method thereof
WO2016072622A2 (en) * 2014-11-04 2016-05-12 (주)에스엠테크 Cement-free accelerating admixture and cement-free composition including same
CN106673526A (en) * 2016-12-30 2017-05-17 安徽华普环境修复材料科技有限公司 Concrete brick with high water permeability
CN106904911A (en) * 2017-03-16 2017-06-30 海南瑞泽新型建材股份有限公司 A kind of anti-corrosion maritime concrete of sea sand and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016072622A2 (en) * 2014-11-04 2016-05-12 (주)에스엠테크 Cement-free accelerating admixture and cement-free composition including same
CN104478287A (en) * 2014-12-29 2015-04-01 福建清源科技有限公司 Multifunctional concrete synergist and preparation method thereof
CN106673526A (en) * 2016-12-30 2017-05-17 安徽华普环境修复材料科技有限公司 Concrete brick with high water permeability
CN106904911A (en) * 2017-03-16 2017-06-30 海南瑞泽新型建材股份有限公司 A kind of anti-corrosion maritime concrete of sea sand and preparation method thereof

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109250944A (en) * 2018-11-12 2019-01-22 武汉理工大学 A kind of zeolite-loaded type chloride ion curing agent and its preparation method and application
CN109250944B (en) * 2018-11-12 2021-04-27 武汉理工大学 Zeolite supported chloride ion curing agent and preparation method and application thereof
CN110171939A (en) * 2019-04-11 2019-08-27 武汉理工大学 A kind of sial phase chaotropic agent and its preparation method and application
CN110183150A (en) * 2019-04-11 2019-08-30 武汉理工大学 A kind of sa waste chloride ion curing agent and its preparation method and application
CN110204239A (en) * 2019-04-11 2019-09-06 武汉理工大学 A kind of lithium slag admixture and its preparation method and application
CN110171939B (en) * 2019-04-11 2021-09-21 武汉理工大学 Silicon-aluminum phase promoter and preparation method and application thereof
CN110204239B (en) * 2019-04-11 2022-03-25 武汉理工大学 Lithium slag admixture and preparation method and application thereof
CN110183150B (en) * 2019-04-11 2022-04-01 武汉理工大学 Silicon-aluminum waste chloride ion curing agent and preparation method and application thereof

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