CN106698992A - Anti-crack corrosion-resistant concrete admixture as well as preparation and application of anti-crack corrosion-resistant concrete admixture - Google Patents
Anti-crack corrosion-resistant concrete admixture as well as preparation and application of anti-crack corrosion-resistant concrete admixture Download PDFInfo
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- CN106698992A CN106698992A CN201710014796.XA CN201710014796A CN106698992A CN 106698992 A CN106698992 A CN 106698992A CN 201710014796 A CN201710014796 A CN 201710014796A CN 106698992 A CN106698992 A CN 106698992A
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- concrete admixture
- concrete
- cracking resistance
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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
- 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
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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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)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses an anti-crack corrosion-resistant concrete admixture as well as preparation and an application of the anti-crack corrosion-resistant concrete admixture. The anti-crack corrosion-resistant concrete admixture is prepared from the following raw materials by weight: 1.5-2.5 parts of fiber comprising a polypropylene fiber, a polyethylene fiber and a carbon fiber, 90-95 parts of an active mineral additive comprising a coal ash, metakaolin, slag and silica fume, and 3.5-7.5 parts of a reactive activator comprising nano dysprosium oxide, nano lanthanum oxide and nano yttrium oxide, the anti-crack corrosion-resistant concrete admixture is doped in a concrete, the weight ratio of a cement in the concrete is 10-40%, a proper amount of a polycarboxylic acid water reducer is added, and the specific doping amount is determined according to the coastal engineering. The pore structure of the concrete is thinned, the corrosion of harmful ions is reduced, the long-term strength of the concrete is guaranteed to improve stably, the carbon dioxide is absorbed, the peaceability, the compactness, the corrosion resistance, the early strength and the anti-cracking ability of the concrete are improved, the service life of the coastal engineering is prolonged, and the economic, social and ecological effects are better.
Description
Technical field
The invention belongs to building material technical field, the anticorrosive concrete admixture of specifically related to a kind of cracking resistance, preparation and
Using.
Background technology
In Hydraulic and Hydro-Power Engineering, the coastal hydraulic structure such as tide-block sluice, sea wall because in alternation of wetting and drying, trend impact,
In the environment of carbonization, microbiologic(al) corrosion, villaumite and sulphate corrosion, various defects easily occur causes disabler.
Coastal hydraulic structure concrete structure is serious by corrosion failure, influences engineering safety and profit point, how to carry
The performance of coastal concrete for hydraulic structure high is a great problem.Research to corrosion-resistant material at present：On the one hand mainly for how carrying
The corrosion resistance of coastal concrete for hydraulic structure high, lacks the cracking resistance to coastal concrete for hydraulic structure；On the other hand, in order to avoid
Coastal concrete for hydraulic structure produces crack, for the cracking resistance for how improving coastal concrete for hydraulic structure, ignores raising along seawater
The research of work concrete corrosion resistance in itself.Therefore, research one kind can improve concrete anticorrosion performance simultaneously and can carry
The anticorrosive concrete admixture of cracking resistance of high cracking resistance energy, to improving China coast waterpower project concrete performance, extension engineering is used
It is life-span, significant.
The content of the invention
The present invention can not simultaneously ensure the cracking resistance and corrosion resistance of coastal hydraulic structure, the present invention for current research
Purpose be to provide a kind of cracking resistance high anticorrosive concrete admixture；It is separately the system of the anticorrosive concrete admixture of this cracking resistance high
Standby and application.
In order to realize the above object the technical solution adopted by the present invention is as follows：
A kind of anticorrosive concrete admixture of cracking resistance, including the raw material of following weight portion is made：1.5~2.5 parts of fiber, active ore deposit
3.5~7.5 parts of 90~95 parts of polymer blends material and activity excitant；
Preferably, the above fiber includes one or more of polypropylene fibre, polyethylene fibre, carbon fiber；
Preferably, the above active mineral admixture is mixed including two or more in flyash, metakaolin, slag, silicon ash
Compound；
Preferably, the above exciting agent includes one or more of nano oxidized dysprosium, nano lanthanum oxide, nano yttrium oxide.
The preparation method of the anticorrosive concrete admixture of the above cracking resistance, comprises the following steps：
（1）Mixing will be stirred in 90~95 parts of raw material active mineral admixture and 3.5~7.5 parts of addition mixers of activity excitant
Uniformly, 1.5~2.5 parts of raw fibre is then added to be uniformly mixed；
（2）By step（1）Compound packaging, obtain the anticorrosive concrete admixture of cracking resistance.
The application process of the anticorrosive concrete admixture of the above cracking resistance, with cement weight in concrete than 10~
The anticorrosive concrete admixture of 40% volume this cracking resistance, adding mode allocates appropriate polycarboxylate water-reducer into mix outward, specific incorporation
Amount according to coastal engineering it needs to be determined that, according to a conventional method be well mixed and engineering construction.
Compared with prior art, advantages of the present invention and have the beneficial effect that：
1st, active mineral admixture granular superfine of the invention, workability can be good, can be obviously improved the workload of concrete, subtracts
Small difficulty of construction, overcomes existing concrete admixture and mixes slurry, uneven technological deficiency in the presence of hardly possible.
2nd, active mineral admixture of the invention is from two or more combinations in flyash, metakaolin, slag, silicon ash
Mixture, greatly improves the performance of active mineral, can refine concrete hole structure, improves concrete compactness, and reduction has
Evil ion erosion, while promoting the generation of F salt in cement-based material, improves the chlorion curing degree in concrete；Meanwhile, it is ultra-fine
The volcano ash effect of active mineral admixture, can ensure the steady growth of late strength of concrete.
3rd, the present invention is exciting agent, dispersion and specific surface area from nano oxidized dysprosium, nano lanthanum oxide, nano yttrium oxide
Greatly, excellent performance, to the surface activation efficiency high of concrete material, can absorbing carbon dioxide, strengthen concrete compactness, carry
High concrete corrosion resistance；And it is capable of the early activity of excited cement and mineral admixture, improve the early strength of concrete.
4th, the synthetic fibers that the present invention is selected, can reduce concrete shrinkage, hinder crack to grow, and improve concrete tough
Property, improve crack-resistant performance of concrete.
5th, the inventive method is simple and easy to apply, Environmental Safety, energy consumption are low, low production cost, easily realizes that industrialized production makes
With the performance to improving coastal concrete for hydraulic structure extends the service life of engineering, with preferable economic benefit, social benefit
And ecological benefits.
Specific embodiment
Below in conjunction with specific embodiment, the present invention is further described, but is not limited to protection scope of the present invention.
Embodiment 1
A kind of anticorrosive concrete admixture of cracking resistance, is made up of the raw material of following weight portion：1.5 parts of polypropylene fibre, flyash
60 parts, 3.5 parts of 35 parts of metakaolin and nano oxidized dysprosium.
Embodiment 2
A kind of anticorrosive concrete admixture of cracking resistance, is made up of the raw material of following weight portion：2.5 parts of polyethylene fibre, flyash
50 parts, 5 parts of 42.5 parts of metakaolin and nano oxidized dysprosium.
Embodiment 3
A kind of anticorrosive concrete admixture of cracking resistance, is made up of the raw material of following weight portion：2 parts of carbon fiber, 52.5 parts of flyash,
5.5 parts of 40 parts of silicon ash and nano lanthanum oxide.
Embodiment 4
A kind of anticorrosive concrete admixture of cracking resistance, is made up of the raw material of following weight portion：2.5 parts of polypropylene fibre, flyash
50 parts, 7.5 parts of 40 parts of silicon ash and nano lanthanum oxide.
Embodiment 5
A kind of anticorrosive concrete admixture of cracking resistance, is made up of the raw material of following weight portion：1.5 parts of polyethylene fibre, flyash
40 parts, 20 parts of slag, 3.5 parts of 25 parts of metakaolin and nano yttrium oxide activity excitant.
Embodiment 6
A kind of anticorrosive concrete admixture of cracking resistance, is made up of the raw material of following weight portion：2.5 parts of carbon fiber, flyash 42.5
5 parts of part, 20 parts of slag, 20 parts of silicon ash and nano yttrium oxide.
The preparation method of the anticorrosive concrete admixture of cracking resistance of above example 1~6, comprises the following steps：
（1）Mixing will be stirred in 90~95 parts of raw material active mineral admixture and 3.5~7.5 parts of addition mixers of activity excitant
Uniformly, 1.5~2.5 parts of raw fibre is then added to be uniformly mixed；
（2）By step（1）Compound packaging, obtain the anticorrosive concrete admixture of cracking resistance.
The application process of the anticorrosive concrete admixture of cracking resistance, with reference to SL352-2006, the element of preparation strength grade C20 is mixed
It is solidifying native as normal concrete, using sand, rubble in PO42.5 cement, IIth area（5~40mm）, normal concrete weight mix
Than for：Water:Cement:Sand:Stone=165:263:842:1130.
By the anticorrosive concrete admixture of the cracking resistance of embodiment 1~6 respectively according to 10% of cement mixing content in normal concrete,
16%th, 22%, 28%, 34%, 40%, mix（Mix outward）In normal concrete.Mix and stir technique：In mixer add formula ratio it is thick,
Appropriate polycarboxylate water-reducer is dissolved in fine aggregate, cement, cracking resistance anti-corrosion admixture, premixing 30s the water of formula ratio, and addition is stirred
Machine is mixed, 180s is stirred.
With reference to SL352-2006, test each group 28d compression strength, tensile splitting strength to evaluate the mechanical property of concrete
Can, 28d test specimen 6h electric fluxes are tested to evaluate the corrosion resistance of concrete, experiment 90d contract with dry rate reflections cracking resistance is anticorrosive outer
Plus raising effect of the agent to crack-resistant performance of concrete, it is as a result as shown in the table：
The anticorrosive concrete admixture application effect table of cracking resistance
Knowable to test result, the anticorrosive concrete admixture of cracking resistance of present invention production mixes concrete, 28d compression strength
28.4%~39.4%, 28d of raising tensile splitting strength raising 44.6%~59.9%, 28d test specimen 6h electric fluxes reduction by 78.2%~
82.2%, 90d contract with dry rate reduction by 27.1%~44.1%, has the advantages that high intensity, improved corrosion performance, high cracking resistance energy.
Claims (5)
1. the anticorrosive concrete admixture of a kind of cracking resistance, it is characterised in that：Raw material including following weight portion is made：Fiber 1.5
3.5~7.5 parts of~2.5 parts, 90~95 parts of active mineral admixture and activity excitant；
The exciting agent includes one or more of nano oxidized dysprosium, nano lanthanum oxide, nano yttrium oxide.
2. the anticorrosive concrete admixture of a kind of cracking resistance according to claim 1, it is characterised in that：The fiber includes poly- third
One or more of alkene fiber, polyethylene fibre, carbon fiber.
3. the anticorrosive concrete admixture of a kind of cracking resistance according to claim 1, it is characterised in that：The active mineral is blended
Material includes two or more mixtures in flyash, metakaolin, slag, silicon ash.
4. the preparation method of the anticorrosive concrete admixture of cracking resistance according to claim 1, it is characterised in that：Including following step
Suddenly：
（1）Mixing will be stirred in 90~95 parts of raw material active mineral admixture and 3.5~7.5 parts of addition mixers of activity excitant
Uniformly, 1.5~2.5 parts of raw fibre is then added to be uniformly mixed；
（2）By step（1）Compound packaging, obtain the anticorrosive concrete admixture of cracking resistance.
5. the application process of the anticorrosive concrete admixture of the cracking resistance according to claim 1, it is characterised in that：With coagulation
In soil cement weight than the anticorrosive concrete admixture of 10~40% volume this cracking resistance, allocate appropriate polycarboxylate water-reducer into, mix
Mode to mix outward, specific incorporation according to coastal engineering it needs to be determined that, well mixed and engineering construction according to a conventional method.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107188450A (en) * | 2017-06-28 | 2017-09-22 | 常州建轩纺织品有限公司 | A kind of Concrete synergist |
| CN108298913A (en) * | 2018-04-03 | 2018-07-20 | 中国矿业大学 | Pile for prestressed pipe and preparation method thereof suitable for underground sulfate corrosion environment |
| CN108947295A (en) * | 2018-09-12 | 2018-12-07 | 十堰市郧阳区成林工贸有限责任公司 | Low-alkali concrete swelling agent and the preparation method and application thereof |
| CN109467329A (en) * | 2018-09-04 | 2019-03-15 | 江苏兆佳建材科技有限公司 | A kind of corrosion resistance polycarboxylate water-reducer formula |
| CN111233398A (en) * | 2020-02-10 | 2020-06-05 | 连云港久和混凝土有限公司 | Recycled concrete based on waste concrete and preparation method thereof |
| CN112225501A (en) * | 2020-09-21 | 2021-01-15 | 湖州上建华煜混凝土有限公司 | Concrete for preventing microbial corrosion and preparation method thereof |
| CN112760266A (en) * | 2021-02-09 | 2021-05-07 | 黑龙江大学 | Bacillus preparation for hydraulic concrete and preparation method and application thereof |
| CN114455909A (en) * | 2022-01-26 | 2022-05-10 | 广西壮族自治区水利科学研究院 | Method for inhibiting alkali activity of silicalite artificial fine aggregate |
| CN115477492A (en) * | 2022-09-15 | 2022-12-16 | 浙江智峰科技有限公司 | Seawater erosion bare concrete additive and preparation method thereof |
| CN116003067A (en) * | 2023-01-06 | 2023-04-25 | 中铁十五局集团有限公司 | High-strength anti-freezing concrete based on modified cement and preparation method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107188450A (en) * | 2017-06-28 | 2017-09-22 | 常州建轩纺织品有限公司 | A kind of Concrete synergist |
| CN108298913A (en) * | 2018-04-03 | 2018-07-20 | 中国矿业大学 | Pile for prestressed pipe and preparation method thereof suitable for underground sulfate corrosion environment |
| CN108298913B (en) * | 2018-04-03 | 2021-02-12 | 中国矿业大学 | Prestressed pipe pile suitable for underground sulfate corrosion environment and preparation method thereof |
| CN109467329A (en) * | 2018-09-04 | 2019-03-15 | 江苏兆佳建材科技有限公司 | A kind of corrosion resistance polycarboxylate water-reducer formula |
| CN108947295A (en) * | 2018-09-12 | 2018-12-07 | 十堰市郧阳区成林工贸有限责任公司 | Low-alkali concrete swelling agent and the preparation method and application thereof |
| CN111233398A (en) * | 2020-02-10 | 2020-06-05 | 连云港久和混凝土有限公司 | Recycled concrete based on waste concrete and preparation method thereof |
| CN112225501A (en) * | 2020-09-21 | 2021-01-15 | 湖州上建华煜混凝土有限公司 | Concrete for preventing microbial corrosion and preparation method thereof |
| CN112760266A (en) * | 2021-02-09 | 2021-05-07 | 黑龙江大学 | Bacillus preparation for hydraulic concrete and preparation method and application thereof |
| CN114455909A (en) * | 2022-01-26 | 2022-05-10 | 广西壮族自治区水利科学研究院 | Method for inhibiting alkali activity of silicalite artificial fine aggregate |
| CN115477492A (en) * | 2022-09-15 | 2022-12-16 | 浙江智峰科技有限公司 | Seawater erosion bare concrete additive and preparation method thereof |
| CN116003067A (en) * | 2023-01-06 | 2023-04-25 | 中铁十五局集团有限公司 | High-strength anti-freezing concrete based on modified cement and preparation method thereof |
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