CN1454865A - Underwater antidispersion concrete admixture for building - Google Patents
Underwater antidispersion concrete admixture for building Download PDFInfo
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- CN1454865A CN1454865A CN 03116916 CN03116916A CN1454865A CN 1454865 A CN1454865 A CN 1454865A CN 03116916 CN03116916 CN 03116916 CN 03116916 A CN03116916 A CN 03116916A CN 1454865 A CN1454865 A CN 1454865A
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- reducing agent
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Abstract
The present invention relates to an underwater antidispersion concrete additive, which is formed from methyl cellulose, polyacrylamide, sodium dodecyl benzene sulfonate, naphthalene series high-effective water reducing agent, octadecanoic acid and zeolite powder. Said invention can be used for underwater direct pouring construction, does not disperse or does not separate, and can automatically fill form and automatically compact under water, and can raise the concrete structure body performance after the concrete is poured under water, and can simplify underwater pouring process and reduce environmental pollution.
Description
Technical field
The invention belongs to building material technical field, be specifically related to a kind of anti-concrete admixture that disperses for building under water.
Background technology
Adopt normal concrete directly to be cast under water, owing to be subjected to the effect of current scour, cement slurry seriously separates with gathering materials in the concrete mix, grout can be broken up loss by current, not only cement slurry is few in the pour mass, and water/glue ratio increase greatly, concrete structure homogeneity extreme difference, intensity and weather resistance seriously descend.Adopt normal concrete to carry out pollution that underwater pouring causes near water environment and the destruction of organism in water is difficult to the imagination.
For many years, in order to improve quality with normal concrete cast underwater structures, engineering unit also adopted multiple special construction method, constructed as adopting cofferdam drainage, folded bag method, pre-packed method or service tools such as employing conduit, bottom opening container, but facts have proved, adopt these traditional constructional methods, the shortcoming that exists is still a lot, and not only quantities is big, and careless slightly, accident resulting from poor quality of projects is difficult to avoid, and the example of failure is also more.
Since former West Germany in 1974 carried out the anti-concrete development research of dispersion first under water and is applied to actual engineering, many countries all actively dropped into the research of this respect, have obtained successful effect.But, take a broad view of over and resist the research and the application achievements of disperseing the concrete aspect under water, because the anti-dispersant that adopts and the anti-under water limitation of disperseing concrete performance of preparing, the anti-under water concrete strength grade generally lower (C30 is following) that disperses of pouring into a mould disperses concrete erosion resistance, frost resistance, anti-Cl to resisting under water
-The research of weather resistance aspects such as perviousness is also less, and more and more incompatible actual engineering is to the anti-new demand that disperses concrete at aspects such as mechanical property and weather resistance under water.In addition, traditional anti-dispersant volume is big, and the cost height has also limited the use of actual engineering.
In relevant patent, also have by plain class of simple adding of fiber or the concrete report of the anti-under water dispersion of polypropylene-base tackifier (water-holding agent) material preparation, but the concrete land and water strength ratio of being prepared has only 65%-70% (7 days) and 70%-75% (28 days), and concrete slump-loss is bigger, is not suitable for remote transportation and pumping construction.
Summary of the invention
The objective of the invention is to propose for building anti-concrete admixture that disperses of good endurance such as good, anti-dispersed strong, the mobile loss of a kind of application property is little, anticorrosive, frost resistance, resistance of chloride ion penetration under water.
The for building anti-under water concrete admixture that disperses that the present invention proposes is made up of methylcellulose gum, polyacrylamide, dodecane base benzene sulfonic acid sodium salt, naphthalene series high-efficiency water-reducing agent, stearic acid, zeolite powder, and the weight ratio of each component is:
Methylcellulose gum 100
Polyacrylamide 85-220
Dodecane base benzene sulfonic acid sodium salt 1.3-8
Naphthalene series high-efficiency water-reducing agent 260-720
Stearic acid 1.3-6.5
Zeolite powder 60-245
The weight ratio that each component is preferable:
Methylcellulose gum 100
Polyacrylamide 122-142
Dodecane base benzene sulfonic acid sodium salt 3-6
Naphthalene series high-efficiency water-reducing agent 460-520
Stearic acid 2-5
Zeolite powder 85-100
Preparation method of the present invention is: by aforementioned each part by weight weighing each component, six kinds of raw materials are mixed by physical mechanical, stir, promptly obtain this product.
Among the present invention, methylcellulose gum and polyacrylamide can be used for food and medicine industry as anti-dispersant, to human body and other biological no damaging effect, give good cohesiveness of concrete and anti-water erosion; Sodium dodecylbenzene sulfonate gives concrete good bleed as air entrapment agent, regulates concrete air content, improves concrete workability and freeze-thaw-cyclicity; Naphthalene series high-efficiency water-reducing agent has adaptability preferably with the flocculation composition, can reduce water consumption significantly, improves concrete workability, improves concrete strength and weather resistance; Stearic acid can be adsorbed in the internal surface of bubble in the concrete as the hydrophobic composition, improves bubble inwall hydrophobic nature; Zeolite powder can be used as the stopping composition of this product on the one hand, makes its protection against the tide, prevents caking, can play enhancement on the other hand.
Among the present invention, naphthalene series high-efficiency water-reducing agent is naphthalene sulfonic acidformaldehyde condensation product (wherein sodium sulphate content is less than 3%).
The present invention is the tawny powder mass.Admixture accounts for the anti-concrete admixture that disperses that the gelling material gross weight is 0.5%-3.5% under water in concrete, can make the anti-concrete that disperses of the good high-performance of application property good (slump is greater than 22cm, and the degree of expansion that collapses is greater than 55cm), ultimate compression strength height (C30-C50), weather resistance under water.Test shows, the concrete anti-dispersiveness of this product of admixture is 70%-80% (7 days) and 85%-90% (28 days) when characterizing with the land and water strength ratio.
Among the present invention, anti-under water dispersion concrete is an important branch of high performance concrete, it has direct under water casting and constructing and does not disperse, do not emanate, can be under water from the performance of filling template and self-compacting, be the important materials that improves structure performance, simplification underwater pouring technology, the saving labour after concrete is poured into a mould under water and avoid near waters is caused environmental pollution, enjoy the attention of engineering circle.
Embodiment
Embodiment 1, anti-under water dispersion concrete admixture for building are pressed methylcellulose gum 12% (weight percent, down with), polyacrylamide 18%, Sodium dodecylbenzene sulfonate 0.5%, naphthalene sulfonic acidformaldehyde condensation product 59%, stearic acid 0.5%, zeolite powder 10% be formulated, this anti-dispersant of admixture (anti-dispersant volume be cement weight 1.2%), can make concrete land and water strength ratio reach 80% (7 days) and 86% (28 days), and under volume reaches 1.5% situation, can make concrete land and water strength ratio reach 87% and 90%.
Embodiment 2, for building anti-under water to disperse concrete admixture to press methylcellulose gum 9%, polyacrylamide 13%, Sodium dodecylbenzene sulfonate 0.4%, naphthalene sulfonic acidformaldehyde condensation product 59%, stearic acid 0.6%, zeolite powder 18% formulated, can be at binder total amount 580kg/m
3, anti-dispersant volume 1.2%B under the sand coarse aggregate ratio 44%-50% situation, makes slump 24cm, the degree of expansion 58cm that collapses, and slump-loss was not more than 4cm in 1 hour, and 28 days ultimate compression strength reach the concrete of C50.
Claims (4)
1, a kind of anti-under water concrete admixture that disperses for building is characterized in that being made up of methylcellulose gum, polyacrylamide, dodecane base benzene sulfonic acid sodium salt, naphthalene series high-efficiency water-reducing agent, stearic acid, zeolite powder, and the weight ratio of each component is:
Methylcellulose gum 100
Polyacrylamide 85-220
Dodecane base benzene sulfonic acid sodium salt 1.3-8
Naphthalene series high-efficiency water-reducing agent 260-720
Stearic acid 1.3-6.5
Zeolite powder 60-245.
2, the anti-under water concrete admixture that disperses for building according to claim 1 is characterized in that the weight ratio that each component is preferable:
Methylcellulose gum 100
Polyacrylamide 122-142
Dodecane base benzene sulfonic acid sodium salt 3-6
Naphthalene series high-efficiency water-reducing agent 460-520
Stearic acid 2-5
Zeolite powder 85-100.
3, the anti-under water concrete admixture that disperses for building according to claim 1 is characterized in that naphthalene series high-efficiency water-reducing agent is a sodium sulphate content less than 3% naphthalene sulfonic acidformaldehyde condensation product.
4, a kind of using method of concrete admixture according to claim 1 is characterized in that admixture addition content in concrete is the 0.5%-3.5% that accounts for the gelling material gross weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031169163A CN1326796C (en) | 2003-05-15 | 2003-05-15 | Underwater antidispersion concrete admixture for building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031169163A CN1326796C (en) | 2003-05-15 | 2003-05-15 | Underwater antidispersion concrete admixture for building |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1454865A true CN1454865A (en) | 2003-11-12 |
| CN1326796C CN1326796C (en) | 2007-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031169163A Expired - Fee Related CN1326796C (en) | 2003-05-15 | 2003-05-15 | Underwater antidispersion concrete admixture for building |
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| CN (1) | CN1326796C (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100383076C (en) * | 2006-01-13 | 2008-04-23 | 冯乃谦 | Preparation method of adding agent for controlling concrete collapse loss |
| CN100445230C (en) * | 2007-03-26 | 2008-12-24 | 李建红 | Multifunction anti-crack water-proof agent for concrete and preparation method |
| CN101289291B (en) * | 2007-04-17 | 2010-04-21 | 中国石油集团工程技术研究院 | Quick coagulation flocculant for anti-washout concrete under water |
| CN101519288B (en) * | 2009-04-03 | 2012-02-22 | 南京瑞迪高新技术公司 | Special additive for underwater undispersed shrinking-free grouting material |
| CN103524068A (en) * | 2013-10-10 | 2014-01-22 | 丁蕴斌 | Underwater undispersed concrete flocculant |
| CN106045367A (en) * | 2016-05-26 | 2016-10-26 | 武汉源锦商品混凝土有限公司 | Dispersion-resistant high-strength concrete additive and preparation method thereof |
| CN106045368A (en) * | 2016-05-30 | 2016-10-26 | 江苏名和集团有限公司 | Admixture special for underwater concrete |
| CN106517859A (en) * | 2016-10-18 | 2017-03-22 | 贵州建工混凝土有限责任公司 | Concrete anti-segregation method |
| CN106517919A (en) * | 2016-11-25 | 2017-03-22 | 新沂市中诺新材料科技有限公司 | Concrete additive used for enhancing chloride ion permeation resistance and concrete comprising same |
| CN106746853A (en) * | 2015-11-20 | 2017-05-31 | 衡阳市银利实业有限公司 | The method for preparing high-strength concrete underwater casting anti-dispersant |
| CN108558242A (en) * | 2018-02-28 | 2018-09-21 | 兴宁市龙江建材实业有限公司 | A kind of Underwater Engineering cement |
| CN110590223A (en) * | 2019-10-24 | 2019-12-20 | 山东鲁碧建材有限公司 | Concrete segregation resisting agent and concrete |
| CN111517727A (en) * | 2020-05-20 | 2020-08-11 | 深圳市东大洋建材有限公司 | Concrete for underwater engineering and preparation method thereof |
-
2003
- 2003-05-15 CN CNB031169163A patent/CN1326796C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100383076C (en) * | 2006-01-13 | 2008-04-23 | 冯乃谦 | Preparation method of adding agent for controlling concrete collapse loss |
| CN100445230C (en) * | 2007-03-26 | 2008-12-24 | 李建红 | Multifunction anti-crack water-proof agent for concrete and preparation method |
| CN101289291B (en) * | 2007-04-17 | 2010-04-21 | 中国石油集团工程技术研究院 | Quick coagulation flocculant for anti-washout concrete under water |
| CN101519288B (en) * | 2009-04-03 | 2012-02-22 | 南京瑞迪高新技术公司 | Special additive for underwater undispersed shrinking-free grouting material |
| CN103524068A (en) * | 2013-10-10 | 2014-01-22 | 丁蕴斌 | Underwater undispersed concrete flocculant |
| CN106746853A (en) * | 2015-11-20 | 2017-05-31 | 衡阳市银利实业有限公司 | The method for preparing high-strength concrete underwater casting anti-dispersant |
| CN106045367A (en) * | 2016-05-26 | 2016-10-26 | 武汉源锦商品混凝土有限公司 | Dispersion-resistant high-strength concrete additive and preparation method thereof |
| CN106045368A (en) * | 2016-05-30 | 2016-10-26 | 江苏名和集团有限公司 | Admixture special for underwater concrete |
| CN106517859A (en) * | 2016-10-18 | 2017-03-22 | 贵州建工混凝土有限责任公司 | Concrete anti-segregation method |
| CN106517919A (en) * | 2016-11-25 | 2017-03-22 | 新沂市中诺新材料科技有限公司 | Concrete additive used for enhancing chloride ion permeation resistance and concrete comprising same |
| CN108558242A (en) * | 2018-02-28 | 2018-09-21 | 兴宁市龙江建材实业有限公司 | A kind of Underwater Engineering cement |
| CN110590223A (en) * | 2019-10-24 | 2019-12-20 | 山东鲁碧建材有限公司 | Concrete segregation resisting agent and concrete |
| CN111517727A (en) * | 2020-05-20 | 2020-08-11 | 深圳市东大洋建材有限公司 | Concrete for underwater engineering and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1326796C (en) | 2007-07-18 |
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Granted publication date: 20070718 Termination date: 20120515 |