CN109095858A - A kind of high impedance concrete and its preparation method and application - Google Patents
A kind of high impedance concrete and its preparation method and application Download PDFInfo
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- CN109095858A CN109095858A CN201811063013.8A CN201811063013A CN109095858A CN 109095858 A CN109095858 A CN 109095858A CN 201811063013 A CN201811063013 A CN 201811063013A CN 109095858 A CN109095858 A CN 109095858A
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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
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
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Abstract
The present invention provides a kind of high impedance concrete and its preparation method and application.A kind of high impedance concrete, including following component: cementitious material, aggregate, water, polyamine, imidazoline quaternary ammonium salt and silane waterproofing agent, and the gross mass of the polyamine, the imidazoline quaternary ammonium salt and the silane waterproofing agent is the 1.6~6.5% of the cementitious material, it is preferred that 2~6%, preferably 3~5%.Concrete of the invention has the characteristics such as good chloride-penetration resistance and high resistivity, for having outstanding advantage in the bottom plate construction of railway traffic engineering, can significantly inhibit the corrosion of reinforced concrete.
Description
Technical field
The present invention relates to building materials fields, more particularly, to a kind of high impedance concrete and its preparation method and application.
Background technique
In recent years, with the rapid increase of Chinese national economy level and the continuous acceleration of Process of Urbanization Construction process, city
City's traffic tension is got worse, and develops the city track traffic engineering based on subway, can significantly improve city friendship
Logical congested conditions, improve quality of residents'life, achieve the purpose that efficiently to utilize land resource.
With flourishing for urban track traffic, the endurance issues of subway engineering, especially metro engineering concrete
Anti-erosion endurance issues under a variety of environmental factor compound actions will cause more and more to pay attention to.
For subway engineering due to its environment particularity, the erosion that concrete is subjected to is more more complicated than ordinary skill concrete
It is harsher.On the one hand, subway engineering, can be to the buried metal and coagulation along track in the prevalence of stray current corrosion phenomenon
Reinforcing bar in soil structure generates serious corrosiveness, greatly threatens to constitute to concrete structure safety；Another party
Face, the main body concrete structure of subway engineering is often in the strong stratum of rich groundwater, water penetration, and China's underground water is special
It is not that phreatic water is contaminated than more serious, rich in etching mediums such as chloride ion, sulfate ions, therefore subway concrete is made
For the structure for being chronically at groundwater seepage, the corrosion of subsurface pressure water is suffered from, the erosion of acidic groundwater contains in underground water
There are sulfate, Cl-Erosion etc..There are also CO in atmosphere in tunnel simultaneously2Carbonization.Wherein, stray current corrosion and ground
The lower common corrosion condition of aqueous medium is relatively conventional.In summary and according to correlation test as a result, metro engineering concrete structure by
Stray electrical current and Chloride Attack threaten maximum, and it is of crucial importance to study a kind of high impedance concrete.
In view of this, the present invention is specifically proposed.
Summary of the invention
The purpose of the present invention is to provide a kind of high impedance concrete, the concrete have good chloride-penetration resistance and
The characteristics such as high resistivity can significantly inhibit reinforced concrete for having outstanding advantage in the bottom plate construction of railway traffic engineering
The corrosion of reinforcing bar in soil.
In order to solve the above technical problems, the present invention provides following technical schemes:
A kind of high impedance concrete, including following component:
Cementitious material, aggregate, water, polyamine, imidazoline quaternary ammonium salt and silane waterproofing agent, and the polyamine, the imidazoles
The gross mass of hyamine and the silane waterproofing agent be the cementitious material 1.6~6.5%, preferably 2~6%, preferably 3~
5%.
It is that concrete of the invention improves impedance and chloride-penetration resistance it is critical that be added in concrete polyamine,
Imidazoline quaternary ammonium salt and silane waterproofing agent, after the mixing of these three components, synergistic effect, which reaches, improves resistivity and reduction chloride ion
The effect of diffusion coefficient.
Specifically, the basic reason of usual steel bar corrosion is that anode region passivating film destroys, iron because of the intrusion of chloride ion
Matrix is oxidized, cathodic region H2O and O2Continuous invasion.And the present invention is by polyamine, imidazoline quaternary ammonium salt and three kinds of silane waterproofing agent
Ingredient mixes in concrete, and as migration-type corrosion inhibitor, one side can directly participate in interfacial chemical reaction, accelerates rebar surface
Passivating film or adsorbed film are formed, to inhibit the anode or cathode electrochemical reaction occurred between concrete and rebar interface；Separately
On the one hand it is scattered in concrete, there is good suction-operated to chloride ion, it is blocked to erode the source of effect.
In conclusion the above concrete of the invention has the advantage that
(1) cost with traditional subway concrete maintains an equal level:
The present invention does not use special raw material, does not use special production technology, cost and commercial goods coagulation yet
The price of soil remains basically stable, but its durability is far longer than the durability of commercial concrete, to largely reduce mixed
The corrosion of reinforcing bar in solidifying soil；
(2) durability is preferable:
Electric flux < 500C, chloride diffusion coefficient < 2.00 (10-12m2·s-1), resistivity is improved compared with normal concrete
10-15K Ω cm realizes the intensity for not only guaranteeing concrete, but also improves the durability of concrete, it is made to have high impedance
The main feature of concrete, and production cost is reduced, while considerably reducing subway engineering later period maintenance cost.
(3) working performance is good:
Whole process of the high impedance concrete prepared using preparation method of the present invention from production to construction is all very easy, mixes
Solidifying geotechnique makees functional, and not sticky, do not isolate, and be easy to pour, mechanics and durability are able to satisfy design requirement, and
Sexual valence is relatively high.
Cementitious material in the present invention refers to the various types of cementitious materials that can be used for concrete, what different type was prepared
The property and purposes of concrete have difference, usually there is inorganic coagulation material and organic cementitious material, the preferred cement composition of the present invention
Inorganic coagulation material.
Aggregate in the present invention is the aggregate for meeting relevant criterion requirement, is mainly made of coarse aggregate and fine aggregate, for example,
The fine aggregate uses fineness modulus for 2.5-3.0, the middle sand (river sand) in the area II；The coarse aggregate is the cobble of 5-40, accordingly
Performance indicator meet the requirements.
In addition to this, the formula of the above concrete of the invention can also be further improved, specific as follows.
Preferably, the mass ratio of the polyamine, the imidazoline quaternary ammonium salt and the silane waterproofing agent is 0.5~1:0.1
~0.5:1~5, preferably 0.6~0.8:0.2~0.5:1~5, preferably 0.75~1:0.1~0.3:3~5.
Adjust the proportion and the adjustable concrete of total addition content of polyamine, imidazoline quaternary ammonium salt and silane waterproofing agent three
The physicochemical properties such as resistivity, chloride diffusion coefficient, frost resistance, intensity and compactness.
Preferably, the quality of polyamine is the 0.5%~1% of cementitious material, such as 0.5%~0.8%, 0.6%~
0.8%.
Preferably, the quality of imidazoline quaternary ammonium salt be cementitious material quality 0.1%~0.5%, preferably 0.2%~
0.5%, preferably 0.3%~0.4%.
Preferably, the quality of silane waterproofing agent is the 1%~5% of cementitious material quality, preferably 1%~3%, preferably 2%
~3%.
Preferably, the polyamine be epichlorohydrin-dimethylamine condensation polymer, epoxychloropropane-polyethylene polyamine condensation polymer,
One of polyvinylamine, polyethyleneimine and amino-polyether or a variety of mixing, preferably amino-polyether, preferably poly- divinyl three
Amine.
On the one hand polyamine is cooperateed with imidazoline quaternary ammonium salt and silane improves impedance, on the other hand imitates with certain thickening
Fruit, improves the viscosity of concrete, and can take into account the above effect using the polyamine of the above-mentioned type.
Preferably, the silane waterproofing agent is in dodecyltrimethoxysilane and hexadecyl trimethoxy silane
One or both mixing.
Concrete surface contact angle can be improved in both silane waterproofing agents, is greatly reduced the water absorption rate of concrete, has
Effect blocks harmful substance entrained by moisture and moisture and penetrates into inside concrete, including chloride ion soluble in water.
Preferably, the cementitious material includes one of flyash, miberal powder and silicon ash or a variety of and cement.
Flyash, miberal powder and silicon ash have superposition and over-superimposed effect to concrete resistivity is improved, and adjust different addition quantity,
Not only the density of adjustable concrete, but also adjustable resistivity.
Preferably, the cementitious material is by flyash, miberal powder, silicon ash and cement composition.
Alternatively, the cementitious material is by flyash, miberal powder and cement composition.
In cementitious material, flyash, miberal powder, silicon ash and cement proportion be adaptively adjusted according to the actual situation.
It preferably, further include water-reducing agent.
Water-reducing agent reduces the dosage of water by the effects of dispersion, lubrication and steric hindrance, while concrete can be made to keep closing
Suitable mobility and stability.
Preferably, the water-reducing agent is polycarboxylate water-reducer, preferably polyacrylic acid, polymethylacrylic acid, polymethyl
It is one or more in sour methyl esters and polymaleic anhydride；
The quality of the water-reducing agent is the 1.5%-2.0%, preferably 1.8%-2.0% of the cementitious material.Preferably, institute
The water-reducing rate of water-reducing agent is stated 25% or more.
It preferably, further include synthetic fibers, the quality of the synthetic fibers is the 1~5% of the cementitious material, preferably
1.5~5%, preferably 1.8~5%；
Certain fiber is mixed, concrete density can be effectively improved, preferably addition staple fiber, such as:
The preferred polypropene staple of synthetic fibers.
Preferably, the aggregate is made of fine aggregate and coarse aggregate with the mass ratio of 64~78:110-120, preferably 65~
78:110-120, preferably 75~78:110-120.
Preferably, the mass ratio of the cementitious material and the water be 35~55:15, preferably 35~50:15, preferably 43~
50:15。
Cement ratio influences the traditional performances such as intensity, shearing force, the density of concrete, and therefore, it is necessary to cement ratio control exists
In the preferred scope of 15:35~55, guarantee other performances for not reducing concrete while improving resistance.
Preferably, the cementitious material and the specific mass of the aggregate are 35~55:170~190, preferably 35~55:175
~185, preferably 43~50:175~185.
High impedance concrete described above the preparation method is as follows:
The aggregate and the cementitious material are mixed, other ingredients are then added, is mixed.
In practical process for preparation, the addition sequence of alternative adjustment sorting and stirring dynamics, mixing time etc., to obtain
Obtain required performance.Meanwhile in preparing high impedance Concrete, it should be noted: 1, the strict control ratio of mud and reinforcing bar protection
Thickness degree；2, strict control concrete crack width；3, concrete surface can be protected with the coating of good weatherability；4, into
Row electrochemical anti-corrosive loses measure；5, strict implement design and job specfication requirement.
In addition, when preparing high impedance concrete, need to consider the product of proportion between each ingredient and aggregate, sand, ash
Matter, partial size etc..
In general, needing to consider the purposes of concrete, the choosing of the concrete of different purposes in raw material disposal and choice phase
Material standard is different.
For the concrete used in the subway, when carrying out the production of superfine composite minerals, using II grade of flyash and S95 mine
Powder carries out preliminary chloride ion content test and screening, selects Na2SO4As powder exciting agent, it is added during powder ball milling
0.02% triethanolamine carries out powder grinding aid.Powder is carried out using mechanical ball mill and the method for chemical activator by comprehensive
Chemokine, and combined processing is carried out, benchmark grinding time 100-120min makes powder specific surface area reach 500-550m2/g。
The activity index of the 7d and 28d of flyash and miberal powder are not less than 70% and 90% respectively, corresponding index (fineness,
Water content, specific surface area, loss on ignition, chloride ion content, sulfur trioxide content) meet code requirement.
When for subway construction, Concrete Design bulk density is 2400kg/m3；The technical parameter of the concrete is water-cement ratio
For 0.30-0.40, sand coarse aggregate ratio 37%-41%.
The cement is ordinary portland cement, and intensity 42.5MPa, performance indicator meets national regulation requirement.
Comprehensive described above, compared with prior art, invention achieves following technical effects:
(1) resistance of concrete improves；
(2) resistance of chloride ion penetration of concrete improves；
(3) cost performance of concrete is high；
(4) anti-freezing property of concrete has certain improvement；
(5) concrete is with strong points, and it is more preferable that the bottom plate for track engineering builds durability；
(6) preparation method of concrete is simple, it is easier to promote.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with specific embodiment, but ability
Field technique personnel will be understood that following described embodiments are some of the embodiments of the present invention, instead of all the embodiments,
It is merely to illustrate the present invention, and is not construed as limiting the scope of the invention.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.The person that is not specified actual conditions in embodiment, carries out according to conventional conditions or manufacturer's recommended conditions.Agents useful for same or instrument
Production firm person is not specified, is the conventional products that can be obtained by commercially available purchase.
Embodiment 1
A kind of subway high impedance concrete matches as follows, units/kg:
The formula of additive: poly- diethylenetriamine, imidazoline quaternary ammonium salt, hexadecyl trimethoxy silane, polyacrylic acid,
The proportion of four kinds of substances is 0.75:0.3:3:1.8.
Embodiment 2
A kind of high impedance concrete, match ratio is as follows, units/kg:
The formula and embodiment 1 of additive.
Embodiment 3
A kind of high impedance concrete, match ratio is as follows, units/kg:
The formula and embodiment 1 of additive.
Embodiment 4
A kind of high impedance concrete, match ratio is as follows, units/kg:
The formula and embodiment 1 of additive.
Embodiment 5
A kind of high impedance concrete, match ratio is as follows, units/kg:
The formula and embodiment 1 of additive.
Embodiment 6
It is only that additional agent prescription is different from the difference of embodiment 2, the formula of additive: poly- diethylenetriamine imidazoline season
Ammonium salt, hexadecyl trimethoxy silane, polyacrylic acid, the proportion of four kinds of substances are 0.5:0.5:1:1.5.
Embodiment 7
It is only that additional agent prescription is different from the difference of embodiment 2, the formula of additive: poly- diethylenetriamine, imidazoline
Quaternary ammonium salt, hexadecyl trimethoxy silane, polyacrylic acid, the proportion of four kinds of substances are 1:0.1:5:2.
Embodiment 8
It is only that additional agent prescription is different from the difference of embodiment 2, the formula of additive: polyethyleneimine, imidazoline season
Ammonium salt, hexadecyl trimethoxy silane, polyacrylic acid, the proportion of four kinds of substances are 0.75 0.3:3:1.8.
Embodiment 9
It is only that additional agent prescription is different from the difference of embodiment 2, the formula of additive: poly- diethylenetriamine, imidazoline
Quaternary ammonium salt, dodecyltrimethoxysilane, polyacrylic acid, the proportion of four kinds of substances are 0.75:0.3:3:1.8.
Comparative example
Conventional C40 concrete proportioning is as follows, units/kg:
The concrete of the embodiment of the present invention is tested for the property below, compared with comparative example.
Table 1
Table 2
Pass through above-mentioned test result, it will thus be seen that
High impedance concrete of the present invention has good chloride-penetration resistance and high resistivity characteristic, can be in railway traffic engineering
In be preferably widely applied.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of high impedance concrete, which is characterized in that including following component:
Cementitious material, aggregate, water, polyamine, imidazoline quaternary ammonium salt and silane waterproofing agent, and the polyamine, the imidazoline season
The gross mass of ammonium salt and the silane waterproofing agent is 1.6~6.5%, preferably 2~6%, preferably the 3~5% of the cementitious material.
2. high impedance concrete according to claim 1, which is characterized in that the polyamine, the imidazoline quaternary ammonium salt and
The mass ratio of the silane waterproofing agent be 0.5~1:0.1~0.5:1~5, preferably 0.6~0.8:0.2~0.5:1~5, preferably
0.75~1:0.1~0.3:3~5.
3. high impedance concrete according to claim 1 or 2, which is characterized in that the polyamine is epoxychloropropane-diformazan
One of amine condensation polymer, epoxychloropropane-polyethylene polyamine condensation polymer, polyvinylamine, polyethyleneimine and amino-polyether or
A variety of mixing, preferably amino-polyether, preferably poly- diethylenetriamine；
Preferably, the silane waterproofing agent is one of dodecyltrimethoxysilane and hexadecyl trimethoxy silane
Or both mixing；
Preferably, the cementitious material includes one of flyash, miberal powder and silicon ash or a variety of and cement；
Preferably, the cementitious material is by flyash, miberal powder, silicon ash and cement composition.
4. high impedance concrete according to claim 1, which is characterized in that further include water-reducing agent；
The preferred polycarboxylate water-reducer of water-reducing agent, preferably polyacrylic acid, polymethylacrylic acid, polymethyl methacrylate and poly-
It is one or more in maleic anhydride；
Preferably, the quality of the water-reducing agent is the 1.5%-2.0%, preferably 1.8%-2.0% of the cementitious material；
Preferably, the water-reducing rate of the water-reducing agent is 25% or more.
5. high impedance concrete according to claim 1 or 4, which is characterized in that further include synthetic fibers, the synthesis is fine
The quality of dimension is 1~5%, preferably 1.5~5%, preferably the 1.8~5% of the cementitious material；
The preferred polypropene staple of synthetic fibers.
6. high impedance concrete according to claim 1, which is characterized in that the aggregate is by fine aggregate and coarse aggregate with 64
The mass ratio of~78:110-120 forms, preferably 65~78:110-120, preferably 75~78:110-120.
7. high impedance concrete according to claim 1, which is characterized in that the mass ratio of the cementitious material and the water
For 35~55:15, preferably 35~50:15, preferably 43~50:15.
8. high impedance concrete according to claim 7, which is characterized in that the ratio matter of the cementitious material and the aggregate
Amount is 35~55:170~190, preferably 35~55:175~185, preferably 43~50:175~185.
9. the preparation method of the described in any item high impedance concrete of claim 1-8, characterized in that it comprises the following steps:
The aggregate and the cementitious material are mixed, other ingredients are then added, is mixed.
10. the purposes of the described in any item high impedance concrete of claim 1-8, which is characterized in that the high impedance concrete
Bottom plate for railway traffic engineering is built, preferably Subway track engineering.
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Cited By (7)
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| CN109809768A (en) * | 2019-03-07 | 2019-05-28 | 安徽理工大学 | A kind of low water-cement ratio high resistivity polymer concrete and preparation method thereof |
| CN111153626A (en) * | 2020-01-03 | 2020-05-15 | 桂林理工大学 | Reinforcing steel bar rust inhibitor for marine concrete and preparation method thereof |
| CN113121265A (en) * | 2019-12-31 | 2021-07-16 | 江苏苏博特新材料股份有限公司 | Intelligent release targeted migration type reinforcement corrosion inhibitor |
| CN116273800A (en) * | 2023-02-15 | 2023-06-23 | 保利长大工程有限公司 | Complete set anti-corrosion construction method for marine environment bridge member |
| CN116675449A (en) * | 2023-04-10 | 2023-09-01 | 盐城工学院 | Activation of low-grade fly ash and cement material prepared from same |
| WO2024013263A1 (en) * | 2022-07-12 | 2024-01-18 | Holcim Technology Ltd | Method of reduction corrosion of reinforced carbonated construction elements |
| CN117886535A (en) * | 2023-09-07 | 2024-04-16 | 江苏苏博特新材料股份有限公司 | Internally-doped concrete compaction reinforcing agent and preparation method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109809768A (en) * | 2019-03-07 | 2019-05-28 | 安徽理工大学 | A kind of low water-cement ratio high resistivity polymer concrete and preparation method thereof |
| CN113121265A (en) * | 2019-12-31 | 2021-07-16 | 江苏苏博特新材料股份有限公司 | Intelligent release targeted migration type reinforcement corrosion inhibitor |
| CN113121265B (en) * | 2019-12-31 | 2022-11-22 | 江苏苏博特新材料股份有限公司 | Intelligent release targeted migration type reinforcement corrosion inhibitor |
| CN111153626A (en) * | 2020-01-03 | 2020-05-15 | 桂林理工大学 | Reinforcing steel bar rust inhibitor for marine concrete and preparation method thereof |
| CN111153626B (en) * | 2020-01-03 | 2021-07-23 | 桂林理工大学 | Reinforcing steel bar rust inhibitor for marine concrete and preparation method thereof |
| WO2024013263A1 (en) * | 2022-07-12 | 2024-01-18 | Holcim Technology Ltd | Method of reduction corrosion of reinforced carbonated construction elements |
| CN116273800A (en) * | 2023-02-15 | 2023-06-23 | 保利长大工程有限公司 | Complete set anti-corrosion construction method for marine environment bridge member |
| CN116675449A (en) * | 2023-04-10 | 2023-09-01 | 盐城工学院 | Activation of low-grade fly ash and cement material prepared from same |
| CN117886535A (en) * | 2023-09-07 | 2024-04-16 | 江苏苏博特新材料股份有限公司 | Internally-doped concrete compaction reinforcing agent and preparation method thereof |
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Application publication date: 20181228 |