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CN103524067A - Bentonite anti-seepage and anti-salt corrosion cement concrete additive - Google Patents

Bentonite anti-seepage and anti-salt corrosion cement concrete additive Download PDF

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Publication number
CN103524067A
CN103524067A CN201310426910.1A CN201310426910A CN103524067A CN 103524067 A CN103524067 A CN 103524067A CN 201310426910 A CN201310426910 A CN 201310426910A CN 103524067 A CN103524067 A CN 103524067A
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China
Prior art keywords
wilkinite
water reducer
mud
soil additive
cement soil
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CN201310426910.1A
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CN103524067B (en
Inventor
尹无忌
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Changsha Zichen Technology Development Co Ltd
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Individual
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Priority to CN201310426910.1A priority Critical patent/CN103524067B/en
Priority to PCT/CN2013/087626 priority patent/WO2015032131A1/en
Priority to US14/379,791 priority patent/US9944557B2/en
Publication of CN103524067A publication Critical patent/CN103524067A/en
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  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)

Abstract

The invention relates to a bentonite anti-seepage and anti-salt corrosion cement concrete additive. The anti-seepage and anti-salt corrosion cement concrete additive is prepared by mixing modified bentonite and a conditioning agent, wherein the conditioning agent is a mixture of active silicon dioxide power and a water reducing agent, and the mass ratio of all the components is as follows: modified bentonite: active silicon dioxide powder: water reducing agent=100: (3-30): (0.3-3.5). The anti-seepage and anti-salt corrosion cement concrete additive is used for preparing cement and concrete. The anti-seepage and anti-salt corrosion cement concrete additive provided by the invention has the advantages of large geological reserves of the used raw material bentonite, wide distribution range, wide range of sources, low cost, good economy and simple and convenient using method.

Description

The impervious anti-salt erosion coagulating cement soil additive of a kind of wilkinite
Technical field
The present invention relates to a kind of coagulating cement soil additive, especially relate to a kind of impervious anti-salt erosion coagulating cement soil additive.
Background technology
Cement is most widely used hydraulic cementing materials, it is concrete consolidating material, after its sclerosis, leave a large amount of capillary porosity ducts and drying shrinkage, heat expansion microfracture, these micro-channels and crack provide path for the erosion of seepage and salt, created condition, cause cement or concrete product or concrete works seepage and salt erosion to destroy, especially impervious in the engineerings such as dam, tunnel, culvert, water channel, pond, tower, burrock, harbour and anti-salt erosion problem becomes a maximum engineering difficult problem.
The technological method of current solution cement concrete engineering leakage and salt erosion problem can be summarized as four large classes: the one, one or multi-channel impervious barrier layer is set; The 2nd, add swelling agent and as calcium sulfate, generate the expansions such as calcium sulphoaluminate and make it finer and close; The 3rd, add a large amount of expensive macromolecular material intentions and block duct and crack; The 4th, adopt special cement; Or adopt above-mentioned several class methods simultaneously.These methods are causing construction costs high in varying degrees, and maintenance cost is high.
Summary of the invention
The technical problem to be solved in the present invention is, overcome the deficiencies in the prior art, the impervious anti-salt erosion coagulating cement soil additive for cement that a kind of easy to use, low cost of manufacture is provided, is applied in cement or concrete, can effectively improve cement and concrete impervious anti-salt erosion performance.
The technical scheme that the present invention solves its technical problem employing is:
The present invention's the impervious anti-salt erosion coagulating cement soil additive of wilkinite, by modified alta-mud and wilkinite adjusting material, be mixed and make, described wilkinite adjusting material is the mixture of active silica powder and water reducer, the mass ratio of each component is, wilkinite: active silica: water reducer=100:3~30:0.3~3.5.
Described wilkinite is wilkinite or the modified alta-mud of montmorillonite mineral content >=80%.
Described modified alta-mud is that calcium base, sodium base, hydrogen are aluminium base, magnesium base, lithium base, organism modified alta-mud and inorganic organic composite modified alta-mud, preferred inorganic-organism composite modified bentonite.
Described active silica powder is silicon industrial residue " silicon ash ", or industrial production amorphous Si O 2powder (as white carbon black), or natural SiO 2the 80 μ m that mineral are made as silica, diatomite etc. tail over≤12% fine powder.
Described water reducer is naphthalene water reducer, melamine system water reducer, modified lignin mahogany sulfonate based water reducer, carboxylate salt based water reducer or sulfamate based water reducer.
The preparation method of the impervious anti-salt erosion of wilkinite of the present invention coagulating cement soil additive: will described each component mixing, levigate to tail over < 12% powder of 80 μ m; Or each powdery components is mixed.
Usage: described impervious anti-salt erosion coagulating cement soil additive is allocated into when the cement grinding, or allocated in cement flour or chamotte powder evenly, or allocate into when mixing concrete, for the production of impervious anti-salt erosion cement or concrete; The amount of allocating into is the 3-15% of cement weight.
Described wilkinite is that the distribution of a kind of special inorganic silicon aluminium mineral material , China is wide, and reserves are large.Research shows, bentonitic essential mineral composition is montmorillonite, montmorillonite is the special aluminosilicate mineral that a class has interlayer structure, the 2:1 type crystal structure that its structure is comprised of two silicon-oxy tetrahedron folder one deck alumina octahedrals, be different from common clay mineral, there is following significantly characteristic: the interlayer structure of (1) montmorillonite prosperity makes it have good swelling property, adsorptivity, ion exchangeable, available positively charged ion and polymer substance embed the abundant modification of its interlayer structure, and can be equipped with suitable material (as active silica flour, water reducer) adjust the performance of wilkinite in media environment, (2) utilize main aluminosilicate mineral in Water by Modified Bentonites mud to have and melt mutually preferably adsorptivity, can not affect strength of cement, (3) there are splendid plasticoviscosity and oilness, water-swellable, its glue medium, expansion capacity, swelling value are superior, in cement concrete media environment through suitable modified after, meet water and can effectively block and fill capillary porosity duct and microfracture, the hazardness expansion stress that but can not cause ettringite and magnesium oxide and so on swelling agent to produce.
Know-why of the present invention is: (1) utilizes wilkinite or modified alta-mud through the active SiO of adjusting material 2water reducer molecule synergy with high absorbability, in cement concrete media environment, the activity of modified rear performance and interlayer absorption exchange activity, improve the blending to cement hydration mineral, can improve concrete strength first, second can suppress and isolate the salt erosion impact of salt erosion environment moisture content; (2) utilize glue medium, expansion capacity, the swelling value characteristic of modified alta-mud excellence after modified, block in time capillary porosity duct and microfracture, and blocking-up and elimination salt erosion condition, the impervious anti-salt that can solve concrete works loses problem; (3) utilize colloid, breathing and the swelling characteristic of modified modified alta-mud can dissolve alternation of wetting and drying, heat expansion and the freeze-thaw cycle damaging influence to concrete structure; And as coagulating cement soil additive.
Beneficial effect of the present invention: (1) raw material wilkinite geologic reserve is large, distribution face width, source is wide, and cost is low; And lateral reactivity SiO 2source is wide, and water reducer is in large supply, good economy performance; (2) easy to use, can alleviate impervious anticorrosion Construction Technology difficulty, and betterment works quality.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but these embodiment must not be for explaining limiting the scope of the invention.
Embodiment 1:
Selecting chimney ash " silicon ash " and the naphthalene water reducer powder of commercially available modification sodium bentonite in powder (fineness 80 μ m tail over < 12%, smectite content 92.5%), silicon metal factory is raw material, press modification sodium bentonite in powder: silicon ash: naphthalene water reducer=100: 5: 1.6 mass ratio batchings, mix, make the impervious anti-salt erosion coagulating cement soil additive of wilkinite.
This additive is allocated in 42.5 class g cements, homogenizing, the amount of allocating into is equivalent to 5% of cement weight, for water channel construction, through 2 years, observes, and does not find seepage salt erosion sign.
Embodiment 2:
In suspension in Purification of Bentonite and modifying process, separately be added into the poly-carboxylic salt water reducer that accounts for wilkinite quality 0.3%, make the butt modified alta-mud (smectite content 91.3%) that simultaneously contains water reducer, alternative is made lateral reactivity carbonic acid gas raw material with silica, press modified alta-mud (wilkinite 100+ water reducer 0.3) 100.3: the mass ratio batching of silica 25, grinding is made the fine powder of fineness < 12%, obtains the impervious anti-salt erosion coagulating cement soil additive of wilkinite.
This additive is allocated in 52.5 class g cements, homogenizing, the amount of allocating into is equivalent to 3% of cement weight, for the construction of seashore burrock, through 2 years, observes, and does not find seepage salt erosion sign.
Embodiment 3:
Select commercially available organism modified alta-mud powder (tail over < 12% smectite content 91% of fineness 80 μ m) and the front product silica flour (being commonly called as white carbon black) of industry and Powdered melamine water reducer, press organism modified alta-mud powder: silica flour: water reducer=100: 10:: 0.8 mass ratio batching, homogenizing, makes the impervious anti-salt erosion water coagulation soil additive of wilkinite.
This additive is replaced to 5% ground-slag and allocate in chamotte powder, blend into 42.5 class g cements, for culvert construction, through 2 years, observe, do not find seepage salt erosion sign.
Embodiment 4:
Selecting the block wilkinite drying after villager's picking is base-material (detecting smectite content 91%), and selecting sulfamate water reducer and diatomite concentrate is that raw material is adjusting material, commercially available ZC-R for alternative<sub TranNum="82">1</sub>the agent of type Composite Modification of Montmorillonite, as bentonite modified dose, is prepared burden block wilkinite, diatomite, water reducer in mass ratio at 100: 30: 1.2, enters the powder process of grinding machine grinding, presses ZC-R in grinding process<sub TranNum="83">1</sub>bentonite modified dose of specification sheets requirement of type, adds ZC-R continuously<sub TranNum="84">1</sub>bentonite modified dose of type, the fineness 80 μ m that make tail over<12% finished powder, be the impervious anti-salt erosion coagulating cement soil additive of wilkinite.
This additive is allocated in the concrete of mixing when the mixing concrete, and the amount of allocating into is equivalent to 6% of cement weight, for sewage lagoon, processes engineering construction, through 2 years, observes, and does not find seepage salt erosion sign.
Embodiment 5:
Selecting commercially available modification lithium base one amino modified bentonite in powder (entangling de-stone content 89.7%, fineness < 12%), silicon ash, Powdered modified lignosulfonate water reducing agent is raw material, bentonite in powder 100 in mass ratio: silicon ash 11.8: modified lignin resin water reducer 3.2 batchings, homogenizing, the finished powder of making, the i.e. impervious anti-salt erosion coagulating cement soil additive of wilkinite.
This additive is allocated into during with mortar in mixing bathroom, and the amount of allocating into is equivalent to 3% of cement weight, for sewage lagoon, processes engineering construction, through 2 years, observes, and does not find seepage salt erosion sign.

Claims (7)

1. the impervious anti-salt erosion of a wilkinite coagulating cement soil additive, is characterized in that, by modified alta-mud with wilkinite adjusting material is composite makes; Described wilkinite adjusting material is the mixture of active silica powder and water reducer, and the mass ratio of each component is, modified alta-mud: active silica powder: water reducer=100: 3 ~ 30: 3 ~ 3.5.
2. the impervious anti-salt erosion coagulating cement soil additive of wilkinite according to claim 1, is characterized in that: described modified alta-mud is the modified alta-mud of montmorillonite mineral content >=80%.
3. the impervious anti-salt of wilkinite according to claim 2 loses coagulating cement soil additive, it is characterized in that: described modified alta-mud is that calcium base, sodium base, hydrogen are aluminium base, magnesium base, lithium base or organism modified alta-mud, or inorganics-organism composite modified bentonite.
4. the impervious anti-salt erosion coagulating cement soil additive of wilkinite according to claim 1, is characterized in that: described active silica powder is silicon industrial residue " silicon ash ", Industrial products amorphous Si O 2powder, or natural SiO 2the 80 μ m that mineral are made tail over≤12% fine powder.
5. the impervious anti-salt erosion coagulating cement soil additive of wilkinite according to claim 4, is characterized in that: described industrial production amorphous Si O 2powder is white carbon black.
6. the impervious anti-salt erosion coagulating cement soil additive of wilkinite according to claim 4, is characterized in that: described natural SiO 2mineral are silica or diatomite.
7. according to the impervious anti-salt erosion coagulating cement soil additive of the wilkinite one of claim 1-6 Suo Shu, it is characterized in that: described water reducer is: naphthalene water reducer, melamine system water reducer, polycarboxylate based water reducer, sulfamate based water reducer or modified lignin mahogany sulfonate based water reducer.
CN201310426910.1A 2013-09-06 2013-09-18 Bentonite anti-seepage and anti-salt corrosion cement concrete additive Active CN103524067B (en)

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CN201310426910.1A CN103524067B (en) 2013-09-18 2013-09-18 Bentonite anti-seepage and anti-salt corrosion cement concrete additive
PCT/CN2013/087626 WO2015032131A1 (en) 2013-09-06 2013-11-21 Bentonite modifier, and modified bentonite and application thereof
US14/379,791 US9944557B2 (en) 2013-09-06 2013-11-21 Bentonite modifier, modified bentonite, and use thereof

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104556775A (en) * 2015-02-09 2015-04-29 孙宁 Concrete additive
CN105669073A (en) * 2016-01-08 2016-06-15 海南瑞泽新型建材股份有限公司 Admixture for improving marine concrete impervious and anti-cracking performance
CN111116079A (en) * 2019-12-30 2020-05-08 庐江县新创新型材料有限公司 Bentonite anti-permeability and anti-salt corrosion concrete additive
CN112707405A (en) * 2021-01-08 2021-04-27 北京建筑材料科学研究总院有限公司 Modified phyllosilicate, preparation method and application thereof

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CN102643059A (en) * 2012-04-27 2012-08-22 中国水电顾问集团成都勘测设计研究院 Bonding treating agent for concrete inorganic interface
CN103145365A (en) * 2013-02-06 2013-06-12 北京中防元大建材科技有限公司 Concrete anti-cracking repairing agent and concrete applying the same

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CN102643059A (en) * 2012-04-27 2012-08-22 中国水电顾问集团成都勘测设计研究院 Bonding treating agent for concrete inorganic interface
CN103145365A (en) * 2013-02-06 2013-06-12 北京中防元大建材科技有限公司 Concrete anti-cracking repairing agent and concrete applying the same

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104556775A (en) * 2015-02-09 2015-04-29 孙宁 Concrete additive
CN105669073A (en) * 2016-01-08 2016-06-15 海南瑞泽新型建材股份有限公司 Admixture for improving marine concrete impervious and anti-cracking performance
CN111116079A (en) * 2019-12-30 2020-05-08 庐江县新创新型材料有限公司 Bentonite anti-permeability and anti-salt corrosion concrete additive
CN111116079B (en) * 2019-12-30 2022-01-25 庐江县新创新型材料有限公司 Bentonite anti-permeability and anti-salt corrosion concrete additive
CN112707405A (en) * 2021-01-08 2021-04-27 北京建筑材料科学研究总院有限公司 Modified phyllosilicate, preparation method and application thereof
CN112707405B (en) * 2021-01-08 2023-01-17 北京建筑材料科学研究总院有限公司 Modified phyllosilicate, and preparation method and application thereof

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Effective date of registration: 20161121

Address after: 410205 Hunan province Changsha Wenxuan High-tech Development Zone, Road No. 27 Lu Valley Yuyuan D3-101 building two floor

Patentee after: CHANGSHA ZICHEN TECHNOLOGY DEVELOPMENT CO., LTD.

Address before: 410000 Yuelu District sunshine Changsha international new town 3-2-801,, 100

Patentee before: Yin Wuji