CN107954628A - A kind of alkali-free chlorine-free sulfate radical-free liquid accelerator - Google Patents
A kind of alkali-free chlorine-free sulfate radical-free liquid accelerator Download PDFInfo
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- CN107954628A CN107954628A CN201810051538.3A CN201810051538A CN107954628A CN 107954628 A CN107954628 A CN 107954628A CN 201810051538 A CN201810051538 A CN 201810051538A CN 107954628 A CN107954628 A CN 107954628A
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- free
- alkali
- component
- sulfate radical
- liquid accelerator
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/10—Accelerators; Activators
- C04B2103/12—Set accelerators
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention discloses a kind of alkali-free chlorine-free sulfate radical-free liquid accelerator, available under sulphate corrosion environment.The liquid accelerator promotees solidifying component by aluminium dihydrogen phosphate, organic alcohol amine, inorganic fluorine-containing rush solidifying component, alkali thickening auxiliary rheological agents component, antifreeze component and water form.Liquid accelerator of the present invention is free of sodium, potassium, chlorine and sulfate radical, with good blood coagulation enhancing effect, setting time is short in construction, intensity is high, rebound degree is low, and there is good low-temperature storage and application, it is particularly suitable for gunite concrete and leak stopping salvaging application under inland and coastal condition of sulfate.
Description
Technical field
The invention belongs to concrete admixture field, and in particular to it is a kind of can be used for sulphate corrosion environment under alkali-free without
Chlorine is without sulphur liquid accelerator and preparation method and application.
Background technology
With the continuous development of concrete technology, additive has become the indispensable important composition portion of modern concrete
Point, improving concrete construction performance, mechanical property and endurance quality using concrete admixture becomes the focus of research and application.
Effect of the accelerator in the engineering construction such as construction of shotcrete and leak stopping repairing is indispensable.
Accelerator is a kind of additive for hardening cement concrete rapid condensation, is mainly used for gunite concrete and leak stopping
In the engineerings such as repairing.Its development experience is from powder accelerator to liquid accelerator, from having alkali accelerator to alkali-free quick-coagulant
Stage.The solidifying effect of powder accelerator rush is fine, cheap, but high there are alkali content, and dust is serious in construction, equipment requirement
Height, endangers the problems such as construction worker is physically and mentally healthy.What is then developed has alkali liquid quick-setting agent to avoid dust problem, but due to depositing
It is big there are loss of strength in substantial amounts of alkali, the problems such as corrosivity is strong, concrete long-term alkali-aggregate reaction.Alkali-free quick-coagulant goes out
Now solve the problems, such as alkali accelerator, there is safety and environmental protection, intensity free of losses, without Plant ecology, therefore alkali-free rapid hardening
Agent is an important directions of current accelerator development.
At present, alkali-free quick-coagulant is all using aluminum sulfate as key component, is aided with other components and prepares what is formed.Such as China specially
Alkali-free quick-coagulant disclosed in sharp (CN100448791C) is made of aluminum sulfate, organic amine, suspending agent and water；Patent
(CN100450956C) alkali-free quick-coagulant disclosed in is made of aluminum sulfate, magnesium sulfate, hydramine, stable Antifoam Agent etc.；Patent
(CN103553406B) alkali-free quick-coagulant disclosed in is made of polyaluminium sulfate, magnesium sulfate, hydramine, inorganic acid and stabilizer.Greatly
The sulfate radical of amount is introduced into the generation that can cause secondary ettringite in concrete, forms swelling stress in inside concrete, even
Cause concrete cracking, the especially concrete works under sulphate corrosion environment, additive is included to concrete raw material
The control of middle sulfate radical is very stringent.
China has a vast territory, and removing chloride causes steel bar corrosion and then influences outside durability, sulfuric acid in the environment of coastal area
The corrosion of salt is also extremely serious and has been increasingly subject to the attention of this area related personnel；On the other hand, the hinterland of the length and breadth of land, especially
The problem of it is the durability most serious that western varieties in saline-alkali areas concrete faces is exactly sulphate corrosion.In above-mentioned sulphate corrosion
Gunite concrete or salvaging under environment cannot introduce extra sulfate radical, and aluminum sulfate traditional at present is the liquid of main body
The use of body accelerator is just restricted, and is badly in need of developing a kind of alkali-free quick-coagulant of sulfate radical-free.
Chinese patent (CN105503016A) proposes a kind of high-strength without sulphur alkali-free liquid accelerator, mainly by nano oxygen
Change aluminium, nano silicon dioxide, trifluoroacetic acid, organic dispersing agent, stabilizer and suspending agent composition, the patent to use nano oxidized
Aluminium and nano silicon dioxide are defined to nanoscale, the problems such as being difficult to construct greatly there are price height, difficulties in dispersion and viscosity.
The content of the invention
For alkali-free quick-coagulant under above-mentioned sulphate corrosion environment cannot the requirement containing sulfate radical, and existing accelerator
Core component and entirely aluminum sulfate, or even if without using aluminum sulfate, asked using other components, and in the presence of be difficult to construct
Topic, the present invention provides a kind of liquid accelerator of alkali-free chlorine-free sulfate radical-free and preparation method and application.
Alkali-free chlorine-free sulfate radical-free liquid accelerator provided by the invention, by aluminium dihydrogen phosphate, organic alcohol amine promote solidifying component,
Inorganic fluorine-containing rush solidifying component, alkali thickening auxiliary rheological agents component, antifreeze component and water composition；The component is according to percentage by weight
It is as follows：
It is more than one or both of diethanol amine, triethanolamine or triisopropanolamine that the organic alcohol amine, which promotees solidifying component,
The combination of arbitrary proportion.
The inorganic fluorine-containing solidifying component of rush is magnesium fluosilicate, magnesium fluoride or aluminum fluoride trihydrate (CAS：In 15098-87-0)
The combination of one or more kinds of arbitrary proportions.
The alkali thickening auxiliary rheological agents component is polyacrylic ester thickener and/or polyurethanes thickener, alkali thickening stream
Becoming agent includes non-association type alkali swollen thickener and association type alkali swollen thickener；It is imitated under neutral or sour environment without thickening
Fruit, has thickening effect under alkaline environment；It is preferred that DSX3560 water-based thickeners, the U.S.'s ROHM AND HAAS of Shenzhen Hai Chuan productions
The TT-935 of production.
The antifreeze component is the combination of one or both of glycerine, urea or PVA any of the above ratio.
The preparation method of the aluminium dihydrogen phosphate, at 40-90 DEG C, stirring is mixed to hydrogen-oxygen by phosphoric acid, aluminium hydroxide and water
Change aluminium to be completely dissolved, up to the aluminium dihydrogen phosphate；Phosphoric acid：The molar ratio of aluminium hydroxide is 3:1.
The present invention provides the preparation method of the alkali-free chlorine-free sulfate radical-free liquid accelerator, include the following steps：
At 40-90 DEG C, aluminium dihydrogen phosphate is dissolved with water, organic alcohol amine is separately added under stirring and promotees solidifying component and inorganic contains
Fluorine promotees solidifying component, stirs 30~120min, adds antifreeze component, continues 30~120min of stirring, after cooling to less than 40 DEG C
Alkali thickening auxiliary rheological agents component is added, stirs 30min.
The application process of the alkali-free chlorine-free sulfate radical-free liquid accelerator, the accelerator are used for gunite concrete, sand
In slurry or repairing reinforced concrete, mortar, its volume is 4~10wt% of gunite concrete cement amount.
Beneficial effect：Alkali-free quick-coagulant alkali-free chlorine-free sulfate radical-free provided by the invention, suitable for various gunite concretes,
Mortar or repairing reinforced concrete, mortar, the gunite concrete being particularly suitable under sulphate corrosion environment, mortar or repairing add
Gu concrete, mortar；Due to aluminium dihydrogen phosphate, the inorganic fluorine-containing synergistic effect for promoting solidifying component and the solidifying component of organic alcohol amine rush, tool
There is good quickening setting time, and cement adaptability is fine；Liquid rapid hardening of the alkali thickening auxiliary rheological agents in the present invention
Thickening power is not played in agent, it is ensured that fluid present invention accelerator storage application when low viscosity, with mortar, concrete bodies
Thickening power is played after system's contact, reduces rebound degree；Antifreeze component be conducive to product in low temperature environment and winter storage and
Using when it is non-condensing and can normal use.
Specific embodiment
For a better understanding of the present invention, present disclosure is further described with reference to embodiment, but this
The content of invention is not limited to the scope of embodiment statement.
Different accelerators is prepared according to being formulated in table 1 below, at 80 DEG C, is dissolved aluminium dihydrogen phosphate with water, stirs lower point
Not Jia Ru organic alcohol amine promote solidifying component and it is inorganic it is fluorine-containing promote solidifying component, stir 60min, add antifreeze component, continue to stir
30min, adds alkali thickening auxiliary rheological agents component after cooling to 30 DEG C, stir 30min.With reference to Chinese building material professional standard
JC477-2005 tests setting time and cement mortar strength, and accelerator volume is the 8% of cement.
As a result as shown in table 1 below, there is alkali-free chlorine-free sulfate radical-free liquid accelerator of the present invention good rush to coagulate effect,
All meet the performance requirement in JC477 standards under 8% volume, be partly even up to the performance requirement of Grade A.
1 embodiment of table, 1~6 liquid accelerator formula and performance
The accelerator prepared using embodiment 3 tests the cement setting time of different manufacturers, as a result as shown in table 2 below,
Liquid accelerator of the present invention has good cement adaptability.
The performance of 2 embodiment of table, 3 liquid accelerator difference cement
| Cement type | Reference cement | Crane woods cement | Small open country water in field mud | The new cement of China | Conch cement |
| Accelerator volume | 6% | 8% | 4% | 8% | 8% |
| Presetting period | 3:10 | 2:50 | 4:30 | 3:45 | 4:05 |
| Final setting time | 8:25 | 7:45 | 11:27 | 9:55 | 11:28 |
| 1 day intensity (MPa) | 12.5 | 10.6 | 15.9 | 9.9 | 12.6 |
| 28 days intensity ratios (%) | 102 | 100 | 105 | 110 | 100 |
Different accelerators is prepared according to being formulated in table 3 below, at 80 DEG C, by the phosphoric acid, aluminium hydroxide and water of 80% concentration
Stirring to aluminium hydroxide is mixed to be completely dissolved；Organic alcohol amine is separately added under stirring and promotees solidifying component and the inorganic solidifying component of fluorine-containing rush,
30min is stirred, adds antifreeze component, continues to stir 120min, alkali thickening auxiliary rheological agents group is added after cooling to less than 40 DEG C
Point, stir 30min.With reference to Chinese building material professional standard JC477-2005 test setting times and cement mortar strength, accelerator
Volume is the 8% of cement.As a result it is as shown in table 3 below：Alkali-free chlorine-free sulfate radical-free liquid accelerator of the present invention has good rush
Effect is coagulated, the performance requirement in JC477 standards is all met under 8% volume；Comparative example 1 and 8 results contrast of embodiment can be seen
Go out, lack the accelerated clotting time that the product being made of the aluminium dihydrogen phosphate of phosphoric acid and aluminium hydroxide preparation significantly extends cement.
3 embodiment 7~8 of table and 1 liquid accelerator formula of comparative example and performance
Embodiment 9, comparative example 2 and comparative example 3, wherein comparative example 2 are prepared for according to the formula in table 4 below and abovementioned steps
Thickener component is eliminated compared with Example 9, and comparative example 3 is compared no antifreeze component with embodiment 9, tested respectively identical
Rebound degree and minimum storage temperature under volume during concrete ejection, as a result as shown in Table, the rebound degree of comparative example 2 is
20%, hence it is evident that higher than the 1% of embodiment 9；The minimum storage temperature of comparative example 3 is 0 DEG C, is placed 3 days in the environment of less than 0 DEG C
There have been solidification phenomenon, and embodiment 9 is placed to have exceeded 30 days under -20 DEG C of environment and not solidified yet.
4 embodiment 9 of table and 2~3 liquid accelerator formula of comparative example and performance
Claims (5)
1. a kind of alkali-free chlorine-free sulfate radical-free liquid accelerator, it is characterised in that solidifying group is promoted by aluminium dihydrogen phosphate, organic alcohol amine
Divide, inorganic fluorine-containing rush solidifying component, alkali thickening auxiliary rheological agents component, antifreeze component and water composition；
The organic alcohol amine promotees solidifying component as one or both of diethanol amine, triethanolamine or triisopropanolamine any of the above
The combination of ratio；
The inorganic fluorine-containing solidifying component of rush is magnesium fluosilicate, magnesium fluoride or aluminum fluoride trihydrate (CAS：One kind in 15098-87-0)
Or the combination of two or more arbitrary proportions；
The alkali thickening auxiliary rheological agents component is polyacrylic ester thickener and/or polyurethanes thickener, alkali thickening rheological agent
Including non-association type alkali swollen thickener and association type alkali swollen thickener；
The antifreeze component is the combination of one or both of glycerine, urea or PVA any of the above ratio.
2. alkali-free chlorine-free sulfate radical-free liquid accelerator according to claim 1, it is characterised in that it is formed according to weight
Percentage is as follows：
3. alkali-free chlorine-free sulfate radical-free liquid accelerator according to claim 1 or 2, it is characterised in that the di(2-ethylhexyl)phosphate
The preparation method of hydrogen aluminium, at 40-90 DEG C, mixes stirring to aluminium hydroxide by phosphoric acid, aluminium hydroxide and water and is completely dissolved, up to institute
State aluminium dihydrogen phosphate；Phosphoric acid：The molar ratio of aluminium hydroxide is 3:1.
4. the preparation method of the alkali-free chlorine-free sulfate radical-free liquid accelerator of any one of claim 1-3, its feature
It is, includes the following steps：
At 40-90 DEG C, aluminium dihydrogen phosphate is dissolved with water, organic alcohol amine is separately added under stirring and promotees solidifying component and inorganic fluorine-containing rush
Solidifying component, stirs 30~120min, adds antifreeze component, continues 30~120min of stirring, added after cooling to less than 40 DEG C
Alkali thickening auxiliary rheological agents component, stirs 30min.
5. the application process of the alkali-free chlorine-free sulfate radical-free liquid accelerator of any one of claim 1-3, its feature
It is, the accelerator is used for gunite concrete, mortar or rushes to repair in reinforced concrete, mortar, its volume is gunite concrete
Or 4~10wt% of mortar cement amount.
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| CN201810051538.3A CN107954628B (en) | 2018-01-19 | 2018-01-19 | Alkali-free chlorine-free sulfate radical-free liquid accelerator |
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| CN201810051538.3A CN107954628B (en) | 2018-01-19 | 2018-01-19 | Alkali-free chlorine-free sulfate radical-free liquid accelerator |
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| CN107954628A true CN107954628A (en) | 2018-04-24 |
| CN107954628B CN107954628B (en) | 2020-06-26 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108358497A (en) * | 2018-05-10 | 2018-08-03 | 江苏地基工程有限公司 | Novel foundation pit waterproof curtain added material alkali-free liquid accelerator and preparation method thereof |
| CN108706897A (en) * | 2018-05-15 | 2018-10-26 | 王宇青 | High-strength alkali-free quick-coagulant and preparation method for cement cementitious matter |
| CN108793813A (en) * | 2018-05-15 | 2018-11-13 | 王宇青 | Alkali-free quick-coagulant and preparation method for silicate-containing cement gel ramming material |
| CN109748533A (en) * | 2019-03-04 | 2019-05-14 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A kind of core master batch and preparation method thereof for alkali-free liquid setting accelerator |
| CN111943560A (en) * | 2020-08-06 | 2020-11-17 | 武汉源锦建材科技有限公司 | Low-resilience alkali-free liquid accelerator and preparation method thereof |
| CN113173728A (en) * | 2021-05-08 | 2021-07-27 | 四川铁科新型建材有限公司 | Alkali-free accelerator resisting aggregate alkali activity reaction and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108358497A (en) * | 2018-05-10 | 2018-08-03 | 江苏地基工程有限公司 | Novel foundation pit waterproof curtain added material alkali-free liquid accelerator and preparation method thereof |
| CN108706897A (en) * | 2018-05-15 | 2018-10-26 | 王宇青 | High-strength alkali-free quick-coagulant and preparation method for cement cementitious matter |
| CN108793813A (en) * | 2018-05-15 | 2018-11-13 | 王宇青 | Alkali-free quick-coagulant and preparation method for silicate-containing cement gel ramming material |
| CN109748533A (en) * | 2019-03-04 | 2019-05-14 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A kind of core master batch and preparation method thereof for alkali-free liquid setting accelerator |
| CN111943560A (en) * | 2020-08-06 | 2020-11-17 | 武汉源锦建材科技有限公司 | Low-resilience alkali-free liquid accelerator and preparation method thereof |
| CN111943560B (en) * | 2020-08-06 | 2022-09-09 | 武汉源锦建材科技有限公司 | Low-resilience alkali-free liquid accelerator and preparation method thereof |
| CN113173728A (en) * | 2021-05-08 | 2021-07-27 | 四川铁科新型建材有限公司 | Alkali-free accelerator resisting aggregate alkali activity reaction and preparation method thereof |
| CN113173728B (en) * | 2021-05-08 | 2023-08-22 | 四川铁科新型建材有限公司 | Alkali-free accelerator for resisting aggregate alkali activity reaction and preparation method thereof |
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