CN108249811A - A kind of concrete anticracking swelling agent and preparation method thereof - Google Patents
A kind of concrete anticracking swelling agent and preparation method thereof Download PDFInfo
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- CN108249811A CN108249811A CN201810107094.0A CN201810107094A CN108249811A CN 108249811 A CN108249811 A CN 108249811A CN 201810107094 A CN201810107094 A CN 201810107094A CN 108249811 A CN108249811 A CN 108249811A
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- concrete
- swelling agent
- concrete anticracking
- anticracking
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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
- 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
-
- 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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B30/00—Preparation of starch, degraded or non-chemically modified starch, amylose, or amylopectin
- C08B30/12—Degraded, destructured or non-chemically modified starch, e.g. mechanically, enzymatically or by irradiation; Bleaching of starch
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B31/00—Preparation of derivatives of starch
Abstract
The invention discloses a kind of concrete anticracking swelling agents and preparation method thereof, are as made from the raw material of following parts by weight：20 30 parts of phosphorus slag powder, 10 15 parts of nickel ground-slag, 20 30 parts of modified ardealite, 15 20 parts of powdery naphthalene water reducer, 59 parts of expanded vermiculite powder, 35 parts of calgon, 5 10 parts of hydroxypropyl methyl cellulose, 5 10 parts of starch compound.Not only expansion rate is high for the concrete anticracking swelling agent of the present invention, and compensation contraction is good, can be adapted with concrete strength, and adaptable, available for the coagulation of different intensity grades, also with efficient diminishing and certain humidification.Compactness, anti-permeability performance, scour resistance and the wear-resisting property of concrete can be significantly improved after the concrete anticracking swelling agent of the present invention is added in concrete.
Description
Technical field
The invention belongs to technical field of concrete additives, and in particular to a kind of concrete anticracking swelling agent and its preparation side
Method.
Background technology
Concrete admixture, abbreviation additive refer to mix to change before mixing concrete mixing or during mix
The substance of kind concrete performance.Since additive can effectively improve the performance of concrete, and with good economic efficiency,
It is widely used in many countries, the application in engineering is increasingly taken seriously, and becomes indispensable in concrete
Material.Wherein swelling agent is one kind in concrete admixture.
Concrete can all generate chemical reaction generation crystalline compounds, due to knot in the initial stage and hydration process of condensation
Brilliant compound is smaller than volume of raw material, so volume of concrete can be caused to shrink, when the tensile stress for shrinking generation is more than concrete
During the ultimate tension of component, concrete cracking is just generated.Cement expansive material is when concrete starts to shrink at or is opening
Begin to generate microdilatancy before shrinking, apply compression to concrete component, to offset, slacken or balance caused by contraction
Tensile stress, so as to achieving the purpose that structurally internal stress is minimum, preventing crackle from occurring, avoiding cracking.
Swelling agent is shunk as compensation to be widely used, but there are still deficiencies for composite expanding agent in the market
Place：1. expansion rate is relatively low；2. it is inadequate to compensate contraction, it is impossible to which the strength development with concrete is adapted.
Invention content
The present invention provides a kind of expansion rate height, and compensation contraction is good, the concrete that can be adapted with concrete strength
Cracking resistance swelling agent.
The present invention also provides the preparation methods of the concrete anticracking swelling agent.
The purpose of the present invention is what is be achieved through the following technical solutions：
A kind of concrete anticracking swelling agent is as made from the raw material of following parts by weight：20-30 parts of phosphorus slag powder, nickel ground-slag 10-15
Part, 20-30 parts of modified ardealite, 15-20 parts of powdery naphthalene water reducer, 5-9 parts of expanded vermiculite powder, 3-5 parts of calgon, hydroxyl
5-10 parts of propyl methocel, 5-10 parts of starch compound.
It is described, modified ardealite be by ardealite under inert gas atmosphere, 600 DEG C of calcining 2-3h are naturally cooling to
It 30-50 DEG C, is uniformly mixed with modifying agent, adds water to water content 20-30%, react 12-16h, drying obtains modified ardealite.
Described, the weight ratio of ardealite and modifying agent is 100：3-5.
Described, modifying agent is according to 1 by aluminum sulfate, calcined alunite and sodium metasilicate：0.8：0.4 weight ratio is made
's.
Described, starch compound is prepared by following steps：
1）Raw material is weighed by weight：10 parts of tapioca, 35 parts of polyethylene glycol 200,2 parts of hydrochloric acid, N,N-dimethylformamide
12 parts, 2 parts of sulfamic acid；
2）Tapioca and polyethylene glycol 200 are added in reaction kettle, stirred evenly；Hydrochloric acid is added, is warming up to 70 DEG C, reaction
6h, filtering, obtains hydrolysis tapioca；
3）N,N-Dimethylformamide and sulfamic acid are added in reaction kettle, stirred evenly；Hydrolysis tapioca is added, is risen
Temperature reacts 1h, cooled to room temperature to 90 DEG C, and sodium hydroxide solution adjusts pH value to 6.5-7.5, and drying obtains starch chemical combination
Object.
Described, the specific surface area of phosphorus slag powder is 600-800m2/kg。
Described, the specific surface area of nickel ground-slag is 400-600m2/ kg,
Described, the grain size of expanded vermiculite powder is 35-45 μm.
A kind of preparation method of concrete anticracking swelling agent, is as made from following steps：
1）Phosphorus slag powder and nickel ground-slag are uniformly mixed, add modified ardealite, is uniformly mixed, obtains material 1；
2）Powdery naphthalene water reducer, expanded vermiculite powder, calgon, hydroxypropyl methyl cellulose and starch compound are mixed
Uniformly, material 2 is obtained；
3）Material 1 is divided into three parts, first part is added in material 2, is uniformly mixed；Second part is added, is uniformly mixed；Finally plus
Enter third part, be uniformly mixed, obtain concrete anticracking swelling agent.
In the present invention, phosphorus slag powder and nickel ground-slag are used in combination, the substances such as titanium pigment, soluble fluoride in phosphorus slag easily with
Free calcium oxide in nickel slag, free magnesium reaction, delay speed of expansion, in the maintenance stage, phosphorus slag powder and nickel ground-slag and water
Secondary pozzolanic reaction occurs for the calcium hydroxide of muddy water, generates microdilatancy, generates expansion crystallographic fill concrete gap, by
The crowd in-out effects of microdilatancy, concrete entirety compactness are improved, and effective compensation concrete early stage and later stage shrink, effectively pre-
The generation of Anti-cracking.Modified ardealite eliminates influence of the impurity such as phosphorus in ardealite, fluorine, organic matter to concrete performance, has
Effect reduces the self-constriction amount of concrete, and can be chemically reacted with concrete hole solution, provides late expansion.Powdery naphthalene system
Water-reducing agent has efficient water-reducing property, and the water consumption of concrete is greatly lowered, hence it is evident that reduces the ratio of mud, while can reduce mixed
The superfluous water being harmful in solidifying soil, reduces porosity, reduces the generation of perforation hole, and the inside that can effectively reduce concrete is received
Contracting.Expanded vermiculite powder generates microdilatancy, and with very strong adsorption capacity, material is linked together, so as to be conducive to concrete
The increase of intensity.Calgon and starch compound on the one hand help in concrete each material can Quick uniform scatter
Come, improve the non-uniform problem of concrete expansion, on the other hand can improve cladding power of the cement on base-material surface, improve concrete
Stability, and reduce the evaporation of surface moisture, reduce concrete surface and hole number is penetrated through caused by moisture evaporation, improve mixed
Coagulate the intensity of soil.Hydroxypropyl methyl cellulose can in concrete effective water conservation, and with the carry out slow release part of aquation
Moisture promotes the progress of hydration reaction, keeps the stability of volume of concrete.
Beneficial effects of the present invention：
1. not only expansion rate is high for the concrete anticracking swelling agent of the present invention, compensation contraction is good, can mutually be fitted with concrete strength
Should, and it is adaptable, available for the coagulation of different intensity grades, also with efficient diminishing and certain humidification.
2. the concrete anticracking swelling agent of the present invention can make the contraction of each age generation of concrete that can obtain synchroballistic,
Be conducive to the raising of crack-resistant performance of concrete and anti-permeability performance.
3. the compactness of concrete can be significantly improved after the concrete anticracking swelling agent of the present invention is added in concrete, is resisted
Ooze performance, scour resistance and wear-resisting property.
4. The invention also achieves the refuse reclamation of phosphorus slag powder, nickel ground-slag and ardealite, turn waste into wealth, have preferable
Ecological benefits.
5. the preparation method of the present invention is simple and practicable, it is particularly suitable for large-scale promotion application.
Specific embodiment
The invention will be further described with reference to embodiments, but the invention is not limited in these embodiments.
Phosphorus slag used in the present invention is derived from the industrial residue of Shandong Yellow Phosphorous Plant discharge, and chemical composition is shown in Table 1.
The chemical composition of 1 phosphorus slag of table
| Composition | SiO2 | Al2O3 | Fe2O3 | CaO | MgO | P2O5 | F- |
| Mass fraction/% | 39.95 | 4.03 | 1 | 45.84 | 2.82 | 1.41 | 2.34 |
Nickel slag used in the present invention is derived from the industrial residue of Shandong Linyi nickel minerals enterprise discharge, and chemical composition is shown in Table 2.
The chemical composition of 2 nickel slag of table
| Composition | SiO2 | Al2O3 | Fe2O3 | CaO | MgO | SO3 |
| Mass fraction/% | 46.44 | 6.10 | 8.1 | 10.92 | 26.27 | 0.02 |
Ardealite used in the present invention is derived from Rizhao City chemical plant ardealite storage yard, and canescence, main component is sulfate dihydrate
Calcium（CaSO4.2H2O）, specific surface area 2750cm2/ g, pH value 2.5, mass fraction containing free water are 20%, chemical composition
It is shown in Table 3.
The chemical composition of 3 ardealite of table
| Composition | P2O5 | SiO2 | Al2O3 | Fe2O3 | CaO | MgO | SO3 | Loss on ignition |
| Mass fraction/% | 1.13 | 3.52 | 0.67 | 0.38 | 32.57 | 0.59 | 46.89 | 13.89 |
Embodiment 1
A kind of concrete anticracking swelling agent is as made from the raw material of following parts by weight：25 parts of phosphorus slag powder, changes 13 parts of nickel ground-slag
25 parts of ardealite of property, 18 parts of powdery naphthalene water reducer, 7 parts of expanded vermiculite powder, 4 parts of calgon, hydroxypropyl methyl cellulose 8
Part, 7 parts of starch compound.
It is described, modified ardealite be by ardealite under inert gas atmosphere, 600 DEG C of calcining 3h are naturally cooling to 40
DEG C, it is uniformly mixed with modifying agent, adds water to water content 25%, react 14h, drying obtains modified ardealite.
Described, the weight ratio of ardealite and modifying agent is 100：4.
Described, modifying agent is according to 1 by aluminum sulfate, calcined alunite and sodium metasilicate：0.8：0.4 weight ratio is made
's.
Described, starch compound is prepared by following steps：
1）Raw material is weighed by weight：10 parts of tapioca, 35 parts of polyethylene glycol 200,2 parts of hydrochloric acid, N,N-dimethylformamide
12 parts, 2 parts of sulfamic acid；
2）Tapioca and polyethylene glycol 200 are added in reaction kettle, stirred evenly；Hydrochloric acid is added, is warming up to 70 DEG C, reaction
6h, filtering, obtains hydrolysis tapioca；
3）N,N-Dimethylformamide and sulfamic acid are added in reaction kettle, stirred evenly；Hydrolysis tapioca is added, is risen
Temperature reacts 1h, cooled to room temperature to 90 DEG C, and sodium hydroxide solution adjusts pH value to 6.5-7.5, and drying obtains starch chemical combination
Object.
Described, the specific surface area of phosphorus slag powder is 600-800m2/kg。
Described, the specific surface area of nickel ground-slag is 400-600m2/ kg,
Described, the grain size of expanded vermiculite powder is 35-45 μm.
A kind of preparation method of concrete anticracking swelling agent, is as made from following steps：
1）Phosphorus slag powder and nickel ground-slag are uniformly mixed, add modified ardealite, is uniformly mixed, obtains material 1；
2）Powdery naphthalene water reducer, expanded vermiculite powder, calgon, hydroxypropyl methyl cellulose and starch compound are mixed
Uniformly, material 2 is obtained；
3）Material 1 is divided into three parts, first part is added in material 2, is uniformly mixed；Second part is added, is uniformly mixed；Finally plus
Enter third part, be uniformly mixed, obtain concrete anticracking swelling agent.
Embodiment 2
A kind of concrete anticracking swelling agent is as made from the raw material of following parts by weight：20 parts of phosphorus slag powder, changes 15 parts of nickel ground-slag
30 parts of ardealite of property, 15 parts of powdery naphthalene water reducer, 5 parts of expanded vermiculite powder, 5 parts of calgon, hydroxypropyl methyl cellulose
10 parts, 5 parts of starch compound.
It is described, modified ardealite be by ardealite under inert gas atmosphere, 600 DEG C of calcining 2h are naturally cooling to 50
DEG C, it is uniformly mixed with modifying agent, adds water to water content 20%, react 16h, drying obtains modified ardealite.
Described, the weight ratio of ardealite and modifying agent is 100：3.
Remaining is the same as embodiment 1.
Embodiment 3
A kind of concrete anticracking swelling agent is as made from the raw material of following parts by weight：30 parts of phosphorus slag powder, changes 10 parts of nickel ground-slag
20 parts of ardealite of property, 20 parts of powdery naphthalene water reducer, 9 parts of expanded vermiculite powder, 3 parts of calgon, hydroxypropyl methyl cellulose 5
Part, 10 parts of starch compound.
It is described, modified ardealite be by ardealite under inert gas atmosphere, 600 DEG C of calcining 3h are naturally cooling to 30
DEG C, it is uniformly mixed with modifying agent, adds water to water content 30%, react 12h, drying obtains modified ardealite.
Described, the weight ratio of ardealite and modifying agent is 100：5.
Remaining is the same as embodiment 1.
Comparative example 1
A kind of concrete anticracking swelling agent is as made from the raw material of following parts by weight：38 parts of phosphorus slag powder, modified ardealite 25
Part, 18 parts of powdery naphthalene water reducer, 7 parts of expanded vermiculite powder, 4 parts of calgon, 8 parts of hydroxypropyl methyl cellulose, starch
Close 7 parts of object.
Remaining is the same as embodiment 1.
Comparative example 2
A kind of concrete anticracking swelling agent is as made from the raw material of following parts by weight：38 parts of nickel ground-slag, modified ardealite 25
Part, 18 parts of powdery naphthalene water reducer, 7 parts of expanded vermiculite powder, 4 parts of calgon, 8 parts of hydroxypropyl methyl cellulose, starch
Close 7 parts of object.
Remaining is the same as embodiment 1.
Comparative example 3
A kind of concrete anticracking swelling agent is as made from the raw material of following parts by weight：25 parts of phosphorus slag powder, 13 parts of nickel ground-slag, powder
18 parts of shape naphthalene water reducer, 7 parts of expanded vermiculite powder, 4 parts of calgon, 8 parts of hydroxypropyl methyl cellulose, starch compound 7
Part.
Remaining is the same as embodiment 1.
Comparative example 4
A kind of concrete anticracking swelling agent is as made from the raw material of following parts by weight：25 parts of phosphorus slag powder, changes 13 parts of nickel ground-slag
25 parts of ardealite of property, 18 parts of powdery naphthalene water reducer, 7 parts of expanded vermiculite powder, 4 parts of calgon, hydroxypropyl methyl cellulose 8
Part.
Remaining is the same as embodiment 1.
Test case
Concrete anticracking swelling agent prepared by embodiment 1-3 and comparative example 1-4 is according to GB23439-2009《Concrete expansion
Agent》Method tested, volume 2%.Test result is as shown in table 4.
4 concrete anticracking swelling agent test result of table
The basic principles, main features and the advantages of the invention have been shown and described above.The technical staff of the industry
It should be appreciated that the present invention is not limited to the above embodiments, the above embodiments and description only describe the present invention
Principle, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these variation and
Improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent
Object defines.
Claims (9)
1. a kind of concrete anticracking swelling agent, which is characterized in that be as made from the raw material of following parts by weight：Phosphorus slag powder 20-30
Part, 10-15 parts of nickel ground-slag, 20-30 parts of modified ardealite, 15-20 parts of powdery naphthalene water reducer, 5-9 parts of expanded vermiculite powder, six are partially
3-5 parts of sodium phosphate, 5-10 parts of hydroxypropyl methyl cellulose, 5-10 parts of starch compound.
2. concrete anticracking swelling agent according to claim 1, which is characterized in that the modified ardealite is existed by ardealite
Under inert gas atmosphere, 600 DEG C of calcining 2-3h are naturally cooling to 30-50 DEG C, are uniformly mixed with modifying agent, add water to water content
20-30%, reacts 12-16h, and drying obtains modified ardealite.
3. concrete anticracking swelling agent according to claim 2, which is characterized in that the weight ratio of the ardealite and modifying agent
It is 100：3-5.
4. concrete anticracking swelling agent according to claim 3, which is characterized in that the modifying agent is by aluminum sulfate, calcining
Alunite and sodium metasilicate are according to 1：0.8：Made from 0.4 weight ratio.
5. concrete anticracking swelling agent according to claim 1, which is characterized in that the starch compound is by following steps
It is prepared：
1）Raw material is weighed by weight：10 parts of tapioca, 35 parts of polyethylene glycol 200,2 parts of hydrochloric acid, N,N-dimethylformamide
12 parts, 2 parts of sulfamic acid；
2）Tapioca and polyethylene glycol 200 are added in reaction kettle, stirred evenly；Hydrochloric acid is added, is warming up to 70 DEG C, reaction
6h, filtering, obtains hydrolysis tapioca；
3）N,N-Dimethylformamide and sulfamic acid are added in reaction kettle, stirred evenly；Hydrolysis tapioca is added, is risen
Temperature reacts 1h, cooled to room temperature to 90 DEG C, and sodium hydroxide solution adjusts pH value to 6.5-7.5, and drying obtains starch chemical combination
Object.
6. concrete anticracking swelling agent according to claim 1, which is characterized in that the specific surface area of the phosphorus slag powder is 600-
800m2/kg。
7. concrete anticracking swelling agent according to claim 1, which is characterized in that the specific surface area of the nickel ground-slag is 400-
600m2/kg。
8. concrete anticracking swelling agent according to claim 1, which is characterized in that the grain size of the expanded vermiculite powder is 35-
45μm。
9. a kind of preparation method of any one of claim 1-8 concrete anticracking swelling agents, which is characterized in that be by with
Made from lower step：
1）Phosphorus slag powder and nickel ground-slag are uniformly mixed, add modified ardealite, is uniformly mixed, obtains material 1；
2）Powdery naphthalene water reducer, expanded vermiculite powder, calgon, hydroxypropyl methyl cellulose and starch compound are mixed
Uniformly, material 2 is obtained；
3）Material 1 is divided into three parts, first part is added in material 2, is uniformly mixed；Second part is added, is uniformly mixed；Finally plus
Enter third part, be uniformly mixed, obtain concrete anticracking swelling agent.
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| CN201810107094.0A CN108249811B (en) | 2018-02-02 | 2018-02-02 | Concrete anti-cracking expanding agent and preparation method thereof |
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|---|---|---|---|
| CN201810107094.0A CN108249811B (en) | 2018-02-02 | 2018-02-02 | Concrete anti-cracking expanding agent and preparation method thereof |
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| CN109160766A (en) * | 2018-10-10 | 2019-01-08 | 广西御龙新型材料有限公司 | A kind of concrete nucleocapsid structure swelling agent and preparation method thereof |
| CN111470792A (en) * | 2020-04-24 | 2020-07-31 | 申璐璐 | Enhanced expansion anti-cracking agent and preparation method thereof |
| CN111592271A (en) * | 2020-05-30 | 2020-08-28 | 科洛结构自防水技术(深圳)有限公司 | Concrete internal-doped anti-seepage anti-cracking shrinkage-reducing agent and preparation method thereof |
| CN117164765A (en) * | 2023-11-01 | 2023-12-05 | 中国核电工程有限公司 | Nuclear engineering concrete temperature-control corrosion-resistant component and preparation method and application thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109160766A (en) * | 2018-10-10 | 2019-01-08 | 广西御龙新型材料有限公司 | A kind of concrete nucleocapsid structure swelling agent and preparation method thereof |
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| CN111470792B (en) * | 2020-04-24 | 2022-11-11 | 湖南辰耀新型建材有限公司 | Enhanced expansion anti-cracking agent and preparation method thereof |
| CN111592271A (en) * | 2020-05-30 | 2020-08-28 | 科洛结构自防水技术(深圳)有限公司 | Concrete internal-doped anti-seepage anti-cracking shrinkage-reducing agent and preparation method thereof |
| CN117164765A (en) * | 2023-11-01 | 2023-12-05 | 中国核电工程有限公司 | Nuclear engineering concrete temperature-control corrosion-resistant component and preparation method and application thereof |
| CN117164765B (en) * | 2023-11-01 | 2024-02-23 | 中国核电工程有限公司 | Nuclear engineering concrete temperature-control corrosion-resistant component and preparation method and application thereof |
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|---|---|
| CN108249811B (en) | 2020-09-15 |
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