CN101792296A - Concrete erosion-resistant agent based on ultrafine slag powder and use method thereof - Google Patents
Concrete erosion-resistant agent based on ultrafine slag powder and use method thereof Download PDFInfo
- Publication number
- CN101792296A CN101792296A CN201010105641A CN201010105641A CN101792296A CN 101792296 A CN101792296 A CN 101792296A CN 201010105641 A CN201010105641 A CN 201010105641A CN 201010105641 A CN201010105641 A CN 201010105641A CN 101792296 A CN101792296 A CN 101792296A
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- CN
- China
- Prior art keywords
- concrete
- slag powder
- ultrafine slag
- erosion
- alunite
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Classifications
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2015—Sulfate resistance
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention belongs to the civil engineering material technical field, in particular relates to a concrete erosion-resistant agent based on ultrafine slag powder and use method thereof. The concrete erosion-resistant agent is composed of ultrafine slag power, polycarboxylic acid water reducer, alunite, dickite and dehydrate gypsum; by adopting the invention, concrete can be caused to meet high liquidity requirement efficiently, and concrete strength can be greatly improved, compatibility is enhanced, and Cl-osmosis and sulphate erosion resisting capability thereof is improved, thus the durability of concrete is greatly improved and the service life of structure is prolonged. The invention has no corrosion action on the reinforcing steel bar in the interior of concrete and is widely applied to preparation of concretes in different strength grades in reinforced concrete and prestressed reinforced concrete structure.
Description
Technical field
The invention belongs to civil engineering material technical field, be specifically related to a kind of anti-erosion agent for concrete and using method thereof based on ultrafine slag powder.
Background technology
Along with the quickening gradually of China's economic construction speed, civil engineering work is regional and coastal to high salt more and more, the offshore area strides forward.And high salt area and coastal waters, coastland are very high to the concrete resistant to chemical etching requirement, and the general requirement concrete possesses good density, sulfate resistance and Cl
-Aggressiveness, thus the weather resistance of raising engineering realizes the Sustainable development of civil engineering work and the general plan requirement of national energy-saving and emission-reduction.
But at present, improve concrete resistant to chemical etching in the actual engineering and still only defer to two principles, that is: 1) reduce water-binder ratio significantly by the admixture high efficiency water reducing agent, the pore structure of refinement concrete hardening body, improve impervious, thereby strengthen its density; 2) a large amount of admixture concrete admixtures are as fine silicon ash, slag powders and flyash etc.The admixture adulterant is an importance improving concrete density, but adulterant will account for the 60%-70% of concrete gel material in the general anti-erosion concrete, and in view of high salt area, coastal and offshore area high-quality adulterant resource shortage, bring very big transportation cost problem, for the concrete preparation of these regional resistance to foulings brings very big difficulty.For this reason, the present invention is based on ultrafine slag powder, develop a kind of volume and be not more than 10% anti-erosion agent for concrete,, just can increase substantially concrete density and resistance to fouling as long as in concrete mix calculates, add 10% with interior this anti-erosion agent.Owing to be compounded with a certain amount of diminishing component in this product, also can save the step of adding water reducer in the engineering, make that the concrete preparation of anti-erosion is simpler.
Summary of the invention
The object of the present invention is to provide a kind of anti-erosion agent for concrete and using method thereof based on ultrafine slag powder.
The anti-erosion agent for concrete based on ultrafine slag powder that the present invention proposes is made up of ultrafine slag powder, poly carboxylic acid series water reducer, alunite, dickite, dihydrate gypsum, and the weight ratio of each component is:
Ultrafine slag powder 100
Poly carboxylic acid series water reducer 0.1-5
Alunite 10-40
Dickite 8-25
Dihydrate gypsum 6-25
The preferable weight ratio of each component is:
Ultrafine slag powder 100
Poly carboxylic acid series water reducer 1-3
Alunite 20-30
Dickite 12-18
Dihydrate gypsum 10-20
Among the present invention, the specific surface area of described ultrafine slag powder is 650-950m
2/ Kg, loss on ignition is less than 3%, and vitreum content is not less than 85%, and density is not less than 2800Kg/m
3, its role is to self micro aggregate effect and microcrystals effect, and improved the structure in concrete interface district and reduced the mutual overlap joint of cement initial stage hydrated product.Because its micro aggregate effect and microcrystals effect can further strengthen concrete later strength, strengthen concrete density.
Among the present invention, described poly carboxylic acid series water reducer is as the high-performance water reducing agent of a new generation, be that a kind of dispersion force is strong, water-reducing effect significantly, bubbling seldom, does not have retarding effect, reduces concrete contraction and strengthens the novel water reducer of concrete later strength, the more important thing is, not adding the material that formaldehyde etc. is harmful to environment in its production process, is a kind of product of environment-friendly type.
Among the present invention, alunite and dickite are expanding materials, can prevent owing to concrete shrinkage produces the crack, and do not influence the fluidization effect of chutable concrete basically, usually, Cracking of High Flowing Concrete is easy to generate desciccation crack, therefore, it is very important adding expanding material.Generate a large amount of ettringite after mixing alunite and dickite in the concrete, can cause filling, stop up and cut off pore and other hole, the concrete overall porosity is reduced, the pore aperture diminishes, improved concrete pore structure, make concrete become more closely knit, thereby reduced concrete water-permeable.Studies show that, mix swelling agent after, reduced concrete because temperature is shunk and own vol shrinks the cracking that causes, reduced all kinds of ionic and invaded, the minimizing harmful ion improves concrete weather resistance to concrete erosion.Dihydrate gypsum has certain solvability, can slowly discharge alunite and dickite aquation at the hydrated cementitious initial stage and form the required sulfate ion of expanded product ettringite, the balance that keeps liquid phase intermediate ion concentration, help a large amount of fast ettringite that form, thereby the dry shrinkage that chemical shrinkage that the compensation hydrated cementitious produces and concrete dehydration produce prevents concrete cracking.
Preparation method of the present invention is: by aforementioned each part by weight weighing each component, raw material is mixed by physical mechanical, promptly obtain desired product.
The present invention does the finely powdered material for grey, and during use, its suitable volume is the 5%-10% of gelling material in the concrete, and concrete volume requires to determine by test according to the required flowability that concrete is reached, later strength and resistance to fouling.Add according to recommending volume (5%-10%) to adopt before concrete placement directly at the scene, pass through the stirring of 1-5min again, the concrete of being prepared gets final product site operation.
The present invention uses as anti-erosion agent for concrete, can effectively make concrete reach the large fluidity requirement, and has excellent water-repellancy and resistance to fouling, in addition, owing to make the matrix concrete structure closely knit, resistance to fouling improves, thereby reaches the requirement of concrete durability excellence.
The present invention is widely used in the concrete preparation of anti-erosion in Steel Concrete, the prestressed reinforced concrete structure to the effect of inside concrete reinforcing bar non-corroding.
Embodiment
Further specify the present invention below by embodiment.
Embodiment 1, presses ultrafine slag powder 67.11% (weight percent, down together) based on the anti-erosion agent for concrete of ultrafine slag powder, poly carboxylic acid series water reducer 0.67%, and alunite 13.42%, dickite 12.09%, dihydrate gypsum 6.71% is formulated.When adding accounts for 10% product of the present invention of cement consumption in the concrete, pass through the stirring of 1-5min again, the concrete slump of being prepared can reach 210mm, but pumping construction.The concrete that this product of admixture is prepared is not compared with mixing the person, and normal pressure bleeding rate ratio is 0, and pressure bleeding rate ratio is 12%, concrete 1d, 3d, 7d and 28d compressive strength rate are respectively 165%, 162%, 154%, 143%, the permeated height ratio is 29%, and the 48h water demand ratio is 52%, Cl
-The depth of penetration ratio be 32%, 25 sodium hydrosulfite 90min to soak-dry by the fire circulation back loss of strength rate ratio be 52%, shrinkage ratio is 97%.
Embodiment 2, press ultrafine slag powder 60.61% (weight percent, down together) based on the anti-erosion agent for concrete of ultrafine slag powder, poly carboxylic acid series water reducer 1.82%, and alunite 18.18%, dickite 7.27%, dihydrate gypsum 12.12% is formulated.When adding accounts for 8% product of the present invention of cement consumption in the concrete, pass through the stirring of 1-5min again, the concrete slump of being prepared can reach 260mm, but pumping construction.The concrete that this product of admixture is prepared is not compared with mixing the person, and normal pressure bleeding rate ratio is 0, and pressure bleeding rate ratio is 17%, concrete 1d, 3d, 7d and 28d compressive strength rate are respectively 183%, 169%, 162%, 150%, the permeated height ratio is 22%, and the 48h water demand ratio is 43%, Cl
-The depth of penetration ratio be 27%, 25 sodium hydrosulfite 90min to soak-dry by the fire circulation back loss of strength rate ratio be 32%, shrinkage ratio is 95%.
Embodiment 3, press ultrafine slag powder 65.79% (weight percent, down together) based on the anti-erosion agent for concrete of ultrafine slag powder, poly carboxylic acid series water reducer 1.32%, and alunite 13.16%, dickite 9.87%, dihydrate gypsum 9.86% is formulated.When adding accounts for 5% product of the present invention of cement consumption in the concrete, pass through the stirring of 1-5min again, the concrete slump of being prepared can reach 200mm, but pumping construction.The concrete that this product of admixture is prepared is not compared with mixing the person, and normal pressure bleeding rate ratio is 0, and pressure bleeding rate ratio is 14%, concrete 1d, 3d, 7d and 28d compressive strength rate are respectively 150%, 142%, 131%, 129%, the permeated height ratio is 26%, and the 48h water demand ratio is 51%, Cl
-The depth of penetration ratio be 34%, 25 sodium hydrosulfite 90min to soak-dry by the fire circulation back loss of strength rate ratio be 43%, shrinkage ratio is 98%.
Embodiment 4, press ultrafine slag powder 61.35% (weight percent, down together) based on the anti-erosion agent for concrete of ultrafine slag powder, poly carboxylic acid series water reducer 0.61%, and alunite 18.40%, dickite 7.36%, dihydrate gypsum 12.28% is formulated.When adding accounts for 9% product of the present invention of cement consumption in the concrete, pass through the stirring of 1-5min again, the concrete slump of being prepared can reach 250mm, but pumping construction.The concrete that this product of admixture is prepared is not compared with mixing the person, and normal pressure bleeding rate ratio is 0, and pressure bleeding rate ratio is 19%, concrete 1d, 3d, 7d and 28d compressive strength rate are respectively 167%, 159%, 143%, 136%, the permeated height ratio is 19%, and the 48h water demand ratio is 34%, Cl
-The depth of penetration ratio be 31%, 25 sodium hydrosulfite 90min to soak-dry by the fire circulation back loss of strength rate ratio be 34%, shrinkage ratio is 93%.
Claims (4)
1. the anti-erosion agent for concrete based on ultrafine slag powder is characterized in that being made up of ultrafine slag powder, poly carboxylic acid series water reducer, alunite, dickite, dihydrate gypsum, and the weight ratio of each component is:
Ultrafine slag powder 100
Poly carboxylic acid series water reducer 0.1-5
Alunite 10-40
Dickite 8-25
Dihydrate gypsum 6-25.
2. the anti-erosion agent for concrete based on ultrafine slag powder according to claim 1 is characterized in that the each component weight ratio is:
Ultrafine slag powder 100
Poly carboxylic acid series water reducer 1-3
Alunite 20-30
Dickite 12-18
Dihydrate gypsum 10-20.
3. the anti-erosion agent for concrete based on ultrafine slag powder according to claim 1, the specific surface area that it is characterized in that described ultrafine slag powder is 650-950m
2/ Kg, loss on ignition is less than 3%, and vitreum content is not less than 85%, and density is not less than 2800Kg/m
3
4. one kind according to claim 1 based on the using method of the anti-erosion agent for concrete of ultrafine slag powder, the add-on that it is characterized in that this anti-erosion agent is the 5%-10% of concrete quality, before concrete placement, adopt and directly add this anti-erosion agent, pass through the stirring of 1-5min again, the concrete of being prepared gets final product site operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101056415A CN101792296B (en) | 2010-02-04 | 2010-02-04 | Concrete erosion-resistant agent based on ultrafine slag powder and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101056415A CN101792296B (en) | 2010-02-04 | 2010-02-04 | Concrete erosion-resistant agent based on ultrafine slag powder and use method thereof |
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| Publication Number | Publication Date |
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| CN101792296A true CN101792296A (en) | 2010-08-04 |
| CN101792296B CN101792296B (en) | 2012-01-25 |
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| CN2010101056415A Expired - Fee Related CN101792296B (en) | 2010-02-04 | 2010-02-04 | Concrete erosion-resistant agent based on ultrafine slag powder and use method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913841A (en) * | 2010-08-15 | 2010-12-15 | 青岛华鼎建材有限公司 | Sulfate corrosion-resistance preservative for concrete |
| CN102092970A (en) * | 2010-12-30 | 2011-06-15 | 济南鲁新新型建材有限公司 | Special admixture for maritime work |
| CN102381851A (en) * | 2011-07-29 | 2012-03-21 | 济南鲁新新型建材有限公司 | Special admixture for tunnel concrete |
| CN103466990A (en) * | 2013-09-06 | 2013-12-25 | 山东省建筑科学研究院 | Concrete anti-cracking waterproof agent for constructing well bore based on freezing method |
| CN103755216A (en) * | 2014-02-17 | 2014-04-30 | 陈宝 | Preparation method of concrete composite additive |
| CN103880323A (en) * | 2014-02-17 | 2014-06-25 | 陈宝 | Preparation method of mixture taking alunite as main raw material |
| CN104276791A (en) * | 2014-09-10 | 2015-01-14 | 解波 | Corrosion-resistant concrete and preparation method thereof |
| CN104591589A (en) * | 2014-02-17 | 2015-05-06 | 陈宝 | Preparation method of composite additive for building material concrete |
| CN104773972A (en) * | 2014-02-23 | 2015-07-15 | 谷苗苗 | Preparation method of mineral admixture capable of improving strength of Portland cement and taking dickite as main raw material |
| CN104829180A (en) * | 2015-04-27 | 2015-08-12 | 海盐水泥制管有限公司 | Preparation method of reinforced concrete tubular column |
| CN105884235A (en) * | 2016-02-19 | 2016-08-24 | 中冶节能环保有限责任公司 | Method for preparing superhigh-strength binding material from granulated blast-furnace slag |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005522404A (en) * | 2002-04-16 | 2005-07-28 | ジー．プラス カンパニー リミテッド | Non-fired clay composition |
| CN101219882B (en) * | 2008-01-22 | 2011-08-03 | 桂林工学院 | Method for producing concrete blending material by using igneous rock |
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- 2010-02-04 CN CN2010101056415A patent/CN101792296B/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913841A (en) * | 2010-08-15 | 2010-12-15 | 青岛华鼎建材有限公司 | Sulfate corrosion-resistance preservative for concrete |
| CN101913841B (en) * | 2010-08-15 | 2013-01-23 | 青岛华鼎建材有限公司 | Sulfate corrosion-resistance preservative for concrete |
| CN102092970A (en) * | 2010-12-30 | 2011-06-15 | 济南鲁新新型建材有限公司 | Special admixture for maritime work |
| CN102092970B (en) * | 2010-12-30 | 2012-10-10 | 济南鲁新新型建材有限公司 | Special admixture for maritime work |
| CN102381851A (en) * | 2011-07-29 | 2012-03-21 | 济南鲁新新型建材有限公司 | Special admixture for tunnel concrete |
| CN103466990A (en) * | 2013-09-06 | 2013-12-25 | 山东省建筑科学研究院 | Concrete anti-cracking waterproof agent for constructing well bore based on freezing method |
| CN103466990B (en) * | 2013-09-06 | 2016-03-23 | 山东省建筑科学研究院 | A kind of based on freezing process pit shaft anti-crack water-proof agent for concrete |
| CN103755216A (en) * | 2014-02-17 | 2014-04-30 | 陈宝 | Preparation method of concrete composite additive |
| CN103880323A (en) * | 2014-02-17 | 2014-06-25 | 陈宝 | Preparation method of mixture taking alunite as main raw material |
| CN104591589A (en) * | 2014-02-17 | 2015-05-06 | 陈宝 | Preparation method of composite additive for building material concrete |
| CN104773968A (en) * | 2014-02-17 | 2015-07-15 | 陈宝 | Preparation method of mixture mainly prepared from alunite |
| CN104773968B (en) * | 2014-02-17 | 2017-02-22 | 武汉轻工大学 | Preparation method of mixture mainly prepared from alunite |
| CN103880323B (en) * | 2014-02-17 | 2015-08-26 | 温州和瑞环境工程有限公司 | A kind of take alunite as the preparation method of the mixture of main raw material |
| CN104773972A (en) * | 2014-02-23 | 2015-07-15 | 谷苗苗 | Preparation method of mineral admixture capable of improving strength of Portland cement and taking dickite as main raw material |
| CN104773972B (en) * | 2014-02-23 | 2016-07-06 | 贵州惠水浩海建材有限公司 | A kind of preparation method of the mineral additive being primary raw material with dickite that can improve portland cement intensity |
| CN104276791A (en) * | 2014-09-10 | 2015-01-14 | 解波 | Corrosion-resistant concrete and preparation method thereof |
| CN104829180A (en) * | 2015-04-27 | 2015-08-12 | 海盐水泥制管有限公司 | Preparation method of reinforced concrete tubular column |
| CN105884235A (en) * | 2016-02-19 | 2016-08-24 | 中冶节能环保有限责任公司 | Method for preparing superhigh-strength binding material from granulated blast-furnace slag |
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| Publication number | Publication date |
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| CN101792296B (en) | 2012-01-25 |
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