CN101898880B - Air entraining agent for concrete with fly ash and preparation method thereof - Google Patents
Air entraining agent for concrete with fly ash and preparation method thereof Download PDFInfo
- Publication number
- CN101898880B CN101898880B CN2009100989075A CN200910098907A CN101898880B CN 101898880 B CN101898880 B CN 101898880B CN 2009100989075 A CN2009100989075 A CN 2009100989075A CN 200910098907 A CN200910098907 A CN 200910098907A CN 101898880 B CN101898880 B CN 101898880B
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- Prior art keywords
- concrete
- fly ash
- air entrapment
- entrapment agent
- entraining agent
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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
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
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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
- 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
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/0004—Compounds chosen for the nature of their cations
- C04B2103/0006—Alkali metal or inorganic ammonium compounds
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/304—Air-entrainers
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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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Combustion & Propulsion (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses an air entraining agent for concrete with fly ash and a preparation method thereof. The method comprises the following steps: firstly adding water in a mixing machine, secondly adding abietic acid or abietate, alkyl sulfonate, alkylpheol ethoxylate and higher fatty alcohol sulfate in the mixing machine in turn to stir and dissolve for 1-2 hours and obtain the entraining agent for concrete with fly ash. By using the air entraining agent, the absorption on the entraining agent caused by activated carbon contained in fly ash can be greatly lowered, thus the effective component of the air entraining agent can be fully utilized and the stability of bubbles in the concrete can be effectively improved.
Description
Technical field
The present invention relates to building material field, be specifically related to air entrapment agent of a kind of concrete that is used for fly ash and preparation method thereof.
Background technology
Concrete air-entrainer all belongs to AS basically, and its molecular structure is made up of hydrophobic group and hydrophilic radical, hydrophilic radical molecule is water-soluble can be positively charged after dissociating because of discharging positively charged ion.
Put it briefly, the mechanism of action of air entrapment agent is: in the concrete whipping process, can make the small bubble of its a large amount of parcels, and these small bubbles can be present in the concrete body stably.
Analyze particularly, the mechanism of action of air entrapment agent comprises following aspect:
1. interfacial activity effect
When not adding air entrapment agent, in the ready-mixed concrete process, also can entrain into a certain amount of bubble.But after adding air entrapment agent, in cement-water-air system, the air entrapment agent molecule is adsorbed on each phase interface very soon.On cement-water termination, form hydrophobic group and point to cement granules, and hydrophilic group points to unit molecule (or polymolecular) the oriented adsorption film of water; On bubble chamber film (also being water-aerosphere face), form hydrophobic group and point to air, and hydrophilic group points to the oriented adsorption layer of water.Owing to the adsorption of tensio-active agent, greatly reduce the free energy of whole system, make in whipping process, introduce small bubbles easily.
2. forming process
Bubble can be divided into three kinds in bubble, foam and colloidal sol property bubble.Bubble in the concrete belongs to colloidal sol property bubble.
Peace and quiet water can not bubble, even under vigorous agitation or oscillation action, make to be involved in the water and stir into small bubbles in small, broken bits and muddiness, but after leaving standstill, bubble floats immediately and vanishes.But after adding air entrapment agent (such as washing powder) in the water,, just introduce great amount of bubbles through vibration or stirring.Its reason is: fluid surface has the trend of dwindling automatically; And bubble is the process that a kind of interfacial area rolls up, and under the constant situation of surface tension, must cause the system free energy to increase greatly; Be the system of thermodynamic instability, can cause bubble to dwindle, vanish.But under the situation that air entrapment agent exists,, reduced interfacial energy, promptly reduced surface tension, thereby foaming is easier to because it can be adsorbed onto on the liquid-vapo(u)r interface.
3. steady bubble effect
Find through test, some tensio-active agent is added in the concrete, in whipping process, also can introduce a large amount of micro-bubbles; But work as concrete is left standstill certain hour, or through after transportation, loading and unloading, the cast, concrete air content is decline greatly but; Most of bubble all overflows and has disappeared; Air entrapment agent is then different, after mixing, not only can make concrete in whipping process, introduce a large amount of micro-bubbles; And these bubbles can more stably exist, and this is to make the important assurance that has the pore of a fixed structure in the maturing.
It is more and more general as gelling material instead of part cement in concrete, to mix a certain amount of flyash in recent years.Mix flyash in the concrete and not only can practice thrift cement, utilization of waste material, and bring two big advantages to concrete performance again: one of which, improved concrete workability.Its two, the concrete freeze-thaw resistance is improved.Simultaneously bring unfavorable factor to concrete again, cause concrete bleed ability drop.The air content loss increases in construction and transportation, and the reason that produces this problem is to contain a certain amount of unburn carbon dust in the flyash, and air entrapment agent is had stronger adsorption.
Producing the maximum unit of flyash is the fuel-burning power plant, Iron And Steel Plant etc.They can reach environmental requirement such as sulfurous gas again according to the utilization of coal-fired energy efficiency, and composite factors such as emission of nitrogen oxide amount are considered to operate.Contain unburned fine particle in the coal ash that burning produces, it is heat-flash decrement (or combustion loss) that the someone is referred to as this part energy, and content is big more to the influence of bleed property more greatly, and big is being high-quality product below 5% extremely.
Cause the unsettled reason of flyash quality that various factors are arranged, probably have following several kinds:
1. it is many, inter-trade respectively to produce flyash sub product producer quantity, and technology is different, and the various places environmental requirement is not equal.
2. it is used coal-fired different to produce the flyash sub product.
3. produce the influence of flyash sub product various places meteorological factor.
General air entrapment agent commonly used; In the concrete of fly ash; Because carbonaceous particles is to the absorption of bleed composition in the flyash; Caused the air entrapment agent of some one-components in the concrete of flyash in great mixed amount, to be difficult to draw gas, simultaneously because this chronic absorption has also caused the loss of air content.Though the adding of excessive air entrapment agent can be put on initial air content come, because its influence to concrete over-all properties is comparatively complicated, the adding of excessive air entrapment agent will reduce concrete hardening strength; And tend to cause the generation of some air pockets, thereby cause each side such as endurance quality such as concrete impervious, freeze proof and outward appearance are caused bad influence.
Summary of the invention
The technical problem that the present invention will solve is in order to overcome technological deficiency recited above; A kind of air entrapment agent that can effectively improve bleed effect and bubble stability is provided; Its technical scheme is following: the present invention is made up of sylvic acid or sylvate, AS, TX10, high fatty alcohol vitriol and water, and each compositions in weight percentage consists of:
Sylvic acid or sylvate: 0%--20%
AS: 0.3%--20%
TX10: 2%--15%
High fatty alcohol vitriol: 0%--1%
Water: 60%--90%
Wherein said sylvic acid or sylvate can play the bleed effect, can introduce a large amount of bubbles.Sylvate wherein can be elected sodium abietate etc. as.
Described AS has the stabilise bubbles function, can work in coordination with sylvic acid or sylvate and play the bleed effect, can elect X 2073 or hexadecyl Supragil GN etc. as as a kind of optimal way.
Described TX10 has anti-adsorption, can reduce the adsorption to air entrapment agent such as flyash, also has certain air-entraining function simultaneously.Can elect polyoxyethylene nonylphenol as as a kind of optimal way.
Described high fatty alcohol vitriol is presented as the bleed effect in air entrapment agent, can elect sodium lauryl sulphate as as a kind of optimal way.
The step of air entrapment agent for preparing the concrete that is used for fly ash of the present invention is following:
Take by weighing each component by aforementioned weight ratio; Earlier water is added in the mixing machine; Again sylvic acid or sylvate, AS, TX10, high fatty alcohol vitriol are added in the mixing machine successively stir, dissolving; Time is 1-2 hour, makes the air entrapment agent of the concrete that is used for fly ash.
The present invention can reduce significantly that contained gac makes the effective constituent of air entrapment agent play one's part to the full to the absorption of air entrapment agent in the flyash, can effectively improve the stability of bubble in the concrete.With various types of water reducers good flexibility is arranged all, can be extensively and the compound use of various water reducers.
Embodiment
Preparation embodiment 1:
The composite high-performance air entrapment agent is pressed sodium abietate 8% (weight percent, as follows), X 2073 1.8%, polyoxyethylene nonylphenol 10%, sodium lauryl sulphate 0.2%, water 80% and is stirred formulated.
Preparation embodiment 2:
The composite high-performance air entrapment agent is pressed sodium abietate 8% (weight percent, as follows), X 2073 2%, polyoxyethylene nonylphenol 10%, water 80% and is stirred formulated.
Preparation embodiment 3:
The composite high-performance air entrapment agent is pressed polyoxyethylene nonylphenol 10% (weight percent, as follows), X 2073 9%, sodium lauryl sulphate 1%, water 80% and is stirred formulated.
The application implementation situation:
Concrete is formed (by 1 cube of concrete) by following weight part material:
P.042.5 ordinary portland cement: 305 kilograms, flyash double centner, 780 kilograms of sands, 993 kilograms in stone, 4 kilograms of high-efficiency water-reducing agent of poly-carboxylic acid, 140 kilograms in water.
The effect comparison situation of table 1 preparation instance and common air entrapment agent
The consumption of other air entrapment agent is all rolled over powder and is mixed in the above table; And the solid content of the air entrapment agent among the preparation embodiment has only 20%; This shows the words of coming in effective constituent; This invention product has obviously lacked much than common air entrapment agent consumption on consumption, so this product price ratio is higher.
From above table, can contrast, this invention has remarkable advantages aspect bubble stable in being mixed with the concrete of flyash, and the gas retention rate is very high.
Claims (5)
1. air entrapment agent that is used for the concrete of fly ash, form by following component and weight percent:
Sodium abietate: 8%～20%,
AS: 0.3%～20%,
TX10: 2%～15%,
High fatty alcohol vitriol: 0%～1%,
Water: 60%～90%;
More than each component sum be 100%.
2. the air entrapment agent that is used for the concrete of fly ash as claimed in claim 1 is characterized in that: described AS is X 2073 or hexadecyl Supragil GN.
3. the air entrapment agent that is used for the concrete of fly ash as claimed in claim 1 is characterized in that: described TX10 is a polyoxyethylene nonylphenol.
4. the air entrapment agent that is used for the concrete of fly ash as claimed in claim 1 is characterized in that: described high fatty alcohol vitriol is sodium lauryl sulphate.
5. like the preparation method of the air entrapment agent of the arbitrary described concrete that is used for fly ash of claim 1 to 4; It is characterized in that: by weight taking by weighing each component; Earlier water is added in the mixing machine; Sodium abietate, AS, TX10, high fatty alcohol vitriol are added in the mixing machine successively again and stir, dissolve, the time is 1～2 hour, makes the air entrapment agent of the concrete that is used for fly ash.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100989075A CN101898880B (en) | 2009-05-25 | 2009-05-25 | Air entraining agent for concrete with fly ash and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100989075A CN101898880B (en) | 2009-05-25 | 2009-05-25 | Air entraining agent for concrete with fly ash and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101898880A CN101898880A (en) | 2010-12-01 |
| CN101898880B true CN101898880B (en) | 2012-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100989075A Active CN101898880B (en) | 2009-05-25 | 2009-05-25 | Air entraining agent for concrete with fly ash and preparation method thereof |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102408200A (en) * | 2011-08-22 | 2012-04-11 | 青田中野天然植物科技有限公司 | Camellia saponin modified compound concrete air-entraining agent |
| CN111978004A (en) * | 2020-07-09 | 2020-11-24 | 浙江五龙新材股份有限公司 | Polycarboxylic acid type efficient pumping agent and application thereof |
| CN111960718A (en) * | 2020-07-22 | 2020-11-20 | 浙江五龙新材股份有限公司 | Super-retarding efficient pumping aid and application thereof |
| CN113698128B (en) * | 2021-08-18 | 2022-06-24 | 山东百纳混凝土有限公司 | Mortar additive, preparation method thereof and use method of mortar additive |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1107817A (en) * | 1994-12-14 | 1995-09-06 | 华南理工大学 | Method for preparing high impervious and anticorrosive concrete with ternary agent |
| CN1313259A (en) * | 2000-07-15 | 2001-09-19 | 华南理工大学 | Process for preparing light building blocks of powdered coal ash for wall |
-
2009
- 2009-05-25 CN CN2009100989075A patent/CN101898880B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1107817A (en) * | 1994-12-14 | 1995-09-06 | 华南理工大学 | Method for preparing high impervious and anticorrosive concrete with ternary agent |
| CN1313259A (en) * | 2000-07-15 | 2001-09-19 | 华南理工大学 | Process for preparing light building blocks of powdered coal ash for wall |
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| Publication number | Publication date |
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| CN101898880A (en) | 2010-12-01 |
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Address after: Five Zhejiang province Deqing County town Longqiao 313201 Applicant after: Zhejiang Wulong New Materials Co., Ltd. Address before: Five Zhejiang province Deqing County town Longqiao 313201 Applicant before: Zhejiang Wulong Chemical Co., Ltd. |
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