CN1454863A - Concrete air-entraining agent for building - Google Patents
Concrete air-entraining agent for building Download PDFInfo
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- CN1454863A CN1454863A CN 03116915 CN03116915A CN1454863A CN 1454863 A CN1454863 A CN 1454863A CN 03116915 CN03116915 CN 03116915 CN 03116915 A CN03116915 A CN 03116915A CN 1454863 A CN1454863 A CN 1454863A
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- concrete
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- mortar
- sodium alkyl
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Abstract
The present invention relates to a concrete air-outgoing agent formed from sodium lauryl sulfate, octadecanoic acid and sulfonated melamine. The application of said invention can greatly improve freezing-thawing resisting circulating property, salt freezing resistance and other various endurance indexes, and its negative affection on hardening body is smaller, and it has a certain effect for controlling concrete slump. Said invention is applicable to various structures (buildings) of reinforced concrete, light aggregate concrete, bridge, building, hydraulic structure and road surface, and is extensively used in building mortar (including plaster, masonry mortar and filling mortar).
Description
Technical field
The invention belongs to building material technical field, be specifically related to a kind of Building Concrete Air Entrainment Pharmaceutical.
Background technology
It is the focal issue that people extremely pay close attention to that the freeze-thaw damage of concrete structure and various structures, road, maritime works's engineering and salt freeze destruction always.Proving already, and added an amount of air entrapment agent in the concrete process for preparation, and introduced in concrete and keep an amount of size bubble small, rational in infrastructure, is to improve the most important measure that concrete antifreezing melts cycle performance and improves durability index significantly.Yet, the air entrapment agent of admixture common variety such as sodium alkyl benzene sulfonate, sulfonated lignin etc., because the bubble structure of introducing is unreasonable, very big (the general every increase by 1% of air content of negative impact to concrete strength, concrete crushing strength decline 5%-6%), hit the enthusiasm that actual engineering is used air entrapment agent.Moreover the air entrapment agent of common variety is because foam stability is poor, concrete mixing well through transportation, park and the moulding process of vibrating in, air content loss is serious, is difficult to control the actual air content that is kept in the maturing in the engineering.Seeking and developing bubble structure air entrapment agent that is reasonable, little to the concrete strength negative impact and the novel kind that foam stability is good is the general orientation that all very make great efforts countries in the world.
Concrete mix is a kind of strong basicity colloidal multi-component material, admixture such as washing powder, soap kind material in its mix process, can introduce a considerable amount of bubbles, but because bubble size is big, very serious to the concrete strength negative impact, be that intensity can reduce significantly, so these materials can not use as concrete air-entrainer.People develop the air entrapment agent of kinds such as rosin tree lipid, sodium alkyl benzene sulfonate class and lignosulfonic acid salt subsequently, no matter on bubble structure and aspect the improving of concrete durability, significant improvement has been arranged all, so present employed air entrapment agent mainly is this class air entrapment agent.Along with the development of concrete technology and people to concrete material structure freeze-thaw-circulation ability, weather resistance, the attention more in work-ing life, market call amount of air entrainment adjustable, introduce bubble structure rationally, the freeze-thaw resistance increase rate is bigger and the air entrapment agent new variety littler to the intensity negative impact.
Summary of the invention
The object of the present invention is to provide a kind of concrete workability of improving, increase substantially the Building Concrete Air Entrainment Pharmaceutical that concrete antifreezing melts cyclicity and weather resistance.
The Building Concrete Air Entrainment Pharmaceutical that the present invention proposes is made up of 12 sodium alkyl sulfates, stearic acid, sulfonated melamine, and the weight ratio of each component is:
12 sodium alkyl sulfates 100
Stearic acid 12-20
Sulfonated melamine 12-25
The preferable weight ratio of each component is:
12 sodium alkyl sulfates 100
Stearic acid 13-16
Sulfonated melamine 15-20
Preparation method of the present invention is: by aforementioned each part by weight weighing each component, three kinds of raw materials are mixed by physical mechanical, stir, promptly obtain this product.
Among the present invention, 12 sodium alkyl sulfates are as bleed and diminishing component, can make concrete in whipping process, introduce the gas that diameter is 20-500 μ m, the 3.0%-7.0% of gas comprises concrete cumulative volume, and concrete water consumption can reduce 6%-10%, thereby concrete diminishing reinforcing effect is offset because the intensity negative effect that bleed brought.Stearic acid is as the hydrophobic component, its role is to be adsorbed in the inner wall surface that makes the bubble of inside concrete generation by the interfacial activity bleed effect of 12 sodium alkyl sulfates, stop moisture soaking in the concrete immersion process to bubble inside, make the unlikely overfill of moisture of bubble inside, like this, under the situation that has a large amount of microbubbles to exist, can make the migration of the supercooled water that moisture is produced because of freezing in the adjacent bubbles unrestricted on the one hand, on the other hand, the filled water amount of bubble own is few, can hold that moisture freezes or the salts substances crystallization after the material that produced, the reason overinflation does not cause the generation of tiny crack.Sulfonated melamine has certain water-reduction on the one hand, on the other hand, more helps to strengthen the stability of the bubble of being introduced by 12 sodium alkyl sulfates, and stable existence is unlikely to assemble loss in inside concrete in the process to make bubble park, vibrate at concrete.
The present invention is white dry powder material, and its suitable incorporation in concrete is the 0.0004%-0.008% of cement (comprising mineral admixture) weight, and concrete volume is determined by test according to the bubbles volume that inside concrete is introduced.The concrete recommendation such as the table 1 of this concrete air-entrainer volume.
The relation of table 1 concrete air-entrainer volume and concrete amount of air entrainment
| Volume (1/0,000) | ????0 | ??0.04 | ????0.1 | ????0.3 | ????0.5 | ??0.7 | ????0.8 |
| Amount of air entrainment (%) | ????0 | ??1.0 | ????1.5 | ????3.0 | ????4.5 | ??5.5 | ????7.0 |
By table 1 as seen, this air entrapment agent of admixture can make inside concrete introduce the bubble of 1.0%-7.0%.Test shows, when when inside concrete is introduced the bubble of 3.0%-6.0%, concrete water-reducing ratio is reached more than the 6%-10%, 3d, 7d and 28d compressive strength rate are all greater than 95%, the relative durability index of concrete is not less than 95%, and concrete permeated height ratio is below 60%.This product of admixture also has reasonable effect to control Cracking of High Flowing Concrete slump-loss.This product is widely used in works (structures) such as Steel Concrete, light aggregate concrete, bridge, building, water conservancy project and road surface to the effect of inside concrete reinforcing bar non-corroding.This product also is widely used in building mortar (comprise plastering mortar, masonry mortar and fill mortar).
The present invention uses as the mortar air entrapment agent, can effectively improve mortar workability and water-retentivity, uses in concrete, can effectively improve concrete workability, improve concrete antifreezing and melt cyclicity, can be used to prepare the concrete of frost resistance grade more than D500.
Embodiment
Embodiment 1, Building Concrete Air Entrainment Pharmaceutical is by 12 sodium alkyl sulfates, 78% (weight percent, down with), stearic acid 10%, sulfonated melamine 12% be formulated, compare with normal concrete (the not same proportioning concrete of this air entrapment agent of admixture), admixture accounts for this air entrapment agent of cement quality 0.1/ ten thousand, can make concrete 's air-containing reach 3.4%, and water-reducing rate reaches 5.2%, bleeding rate reduces by 47%, and 3d, 7d and 28d compressive strength rate are all more than 100%.
Embodiment 2, the Building Concrete Air Entrainment Pharmaceutical prescription is by 12 sodium alkyl sulfates 76%, stearic acid 14%, sulfonated melamine 10% is formulated, compare with normal concrete, admixture accounts for this air entrapment agent of cement quality 0.4/ ten thousand, can make concrete 's air-containing reach 5.5%-6.0%, water-reducing rate reaches 7.6%, bleeding rate reduces by 64%, and 3d, 7d and 28d compressive strength rate are all more than 95%, behind 500 freeze-thaw cycle, the concrete crushing strength reduced rate is not more than 10%, and the dynamic modulus of elasticity reduced rate is no more than 8%.
Claims (3)
1, a kind of Building Concrete Air Entrainment Pharmaceutical is characterized in that being made up of 12 sodium alkyl sulfates, stearic acid, sulfonated melamine, and the weight ratio of each component is:
12 sodium alkyl sulfates 100
Stearic acid 12-20
Sulfonated melamine 12-25.
2, concrete air-entrainer according to claim 1 is characterized in that the preferable weight ratio of each component is:
12 sodium alkyl sulfates 100
Stearic acid 13-16
Sulfonated melamine 15-20.
3, a kind of using method of concrete air-entrainer according to claim 1, the incorporation that it is characterized in that air entrapment agent is the 0.0004%-0.008% of cement weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031169155A CN1309673C (en) | 2003-05-15 | 2003-05-15 | Concrete air-entraining agent for building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031169155A CN1309673C (en) | 2003-05-15 | 2003-05-15 | Concrete air-entraining agent for building |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1454863A true CN1454863A (en) | 2003-11-12 |
| CN1309673C CN1309673C (en) | 2007-04-11 |
Family
ID=29260063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031169155A Expired - Fee Related CN1309673C (en) | 2003-05-15 | 2003-05-15 | Concrete air-entraining agent for building |
Country Status (1)
| Country | Link |
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| CN (1) | CN1309673C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100337964C (en) * | 2006-02-16 | 2007-09-19 | 江苏博特新材料有限公司 | Concrete air-entrainer |
| CN101462843B (en) * | 2008-12-17 | 2011-05-25 | 同济大学 | Marine concrete corrosion resistant additive and preparation thereof |
| CN103214210A (en) * | 2013-05-14 | 2013-07-24 | 十九冶成都建设有限公司 | Secondary concrete fluidizing agent |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5207831A (en) * | 1989-06-08 | 1993-05-04 | Shell Oil Company | Cement fluid loss reduction |
| CN1084147A (en) * | 1992-09-16 | 1994-03-23 | 马清浩 | High efficiency concrete antifreezer |
| CN1113688C (en) * | 1998-07-31 | 2003-07-09 | 朱孟雄 | Efficient mortar foaming agent and its production process |
| CN1093098C (en) * | 2000-03-22 | 2002-10-23 | 中国科学院广州化学研究所 | Cement concrete modifying method with condensate of melamine sulfonate and formaldehyde |
-
2003
- 2003-05-15 CN CNB031169155A patent/CN1309673C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100337964C (en) * | 2006-02-16 | 2007-09-19 | 江苏博特新材料有限公司 | Concrete air-entrainer |
| CN101462843B (en) * | 2008-12-17 | 2011-05-25 | 同济大学 | Marine concrete corrosion resistant additive and preparation thereof |
| CN103214210A (en) * | 2013-05-14 | 2013-07-24 | 十九冶成都建设有限公司 | Secondary concrete fluidizing agent |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1309673C (en) | 2007-04-11 |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Zhejiang Wulong Chemical Co., Ltd. Assignor: Tongji University Contract fulfillment period: 2008.2.1 to 2014.12.30 contract change Contract record no.: 2009330000156 Denomination of invention: Concrete air-entraining agent for building Granted publication date: 20070411 License type: Exclusive license Record date: 2009.1.21 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.2.1 TO 2014.12.30; CHANGE OF CONTRACT Name of requester: ZHEJIANG PROVINCE WULONG CHEMICAL CO., LTD. Effective date: 20090121 |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070411 Termination date: 20130515 |