CN110078403A - A kind of super hardening alkali-free liquid accelerator and preparation method thereof - Google Patents
A kind of super hardening alkali-free liquid accelerator and preparation method thereof Download PDFInfo
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- CN110078403A CN110078403A CN201910507907.XA CN201910507907A CN110078403A CN 110078403 A CN110078403 A CN 110078403A CN 201910507907 A CN201910507907 A CN 201910507907A CN 110078403 A CN110078403 A CN 110078403A
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- free liquid
- alkali
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- triisopropanolamine
- super hardening
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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 invention discloses a kind of super hardening alkali-free liquid accelerators and preparation method thereof, the raw material and each component mass percent of the accelerator be, aluminum sulfate 32%~42%, hydrated calcium silicate 10%~20%, lithium fluorosilicate 3%~5%, triisopropanolamine 4%~8%, pH adjusting agent 1%~3%, suspending agent 1%~2%, surplus are water, and total amount supplies 100%.Super hardening alkali-free liquid accelerator of the invention can use in gunite concrete wet spraying process.Stationary phase more than five months, meets setting time under 5%~7% volume, and the cement 6h intensity of different cultivars can be made to can reach 2.8MPa, 12h intensity reaches 6MPa, 1d intensity is more than 20MPa, and 28 days compressive strength rates reach 108%, and compression strength retention rate reaches 115% within 90 days.It invention can be widely used in the supporting of the engineerings such as highway, railway, mine, municipal administration.
Description
Technical field
The invention belongs to the concrete admixtures of construction material.Super hardening alkali-free liquid accelerator of the present invention particularly useful as
Accelerator in gunite concrete wet spraying process.It can be widely used for railway and vcehicular tunnel, the undergrounds such as diversion culvert, mine working
The initial stage of engineering or permanent support.
Background technique
Accelerator is the additive for making concrete or cement mortar condense hardening rapidly.Gunite concrete is using concrete
Spraying machine will be ejected on palisades surface by certain combination process mixed with the pea gravel concreten of accelerator, and is consolidated into rapidly
One layer of supporting construction, to play support action to country rock.Accelerator is defined in European concrete-spraying technology regulation to be added
Make its rapid condensation into gunite concrete and promotes the additive of early strength development.
Good early strength development is most important to concrete spraying support effect, construction safety.Chinese railway is published
Common gunite concrete is introduced in " Tunnel Engineering " that society publishes can have intensity, 8h after 10min or so final set, general 2h
Afterwards up to 2MPa, 5MPa is reached after 16h, for 24 hours after up to 7MPa~8MPa.And improving gunite concrete early strength is accelerator
A kind of function, define in current standard GB/T35159-2017 alkali-free quick-coagulant early strength standard be 1d compression strength not
Less than 7MPa, and for accelerator for 24 hours within strength development do not provide then.
During gunite concrete practice of construction, usually postorder construction will not be carried out again after for 24 hours.Therefore have very much
Necessity research, exploitation have the alkali-free quick-coagulant of super hardening (6h compression strength is higher) effect.
Summary of the invention
The object of the present invention is to provide a kind of super hardening alkali-free liquid accelerator, which can make to spray
Concrete obtains higher extreme early intensity (6h compression strength is greater than 2MPa), and later strength is not lost, and is cooperated with cement
When lower volume have more commodity advantage.
It is a further object of the present invention to provide the preparation methods of the accelerator and the accelerator answering in gunite concrete
With.
The present invention adopts the following technical scheme that realization.
A kind of super hardening alkali-free liquid accelerator, the raw material and each component mass percent of the present invention accelerator are as follows: sulphur
Sour aluminium 32%~42%；Hydrated calcium silicate 10%~20%；Lithium fluorosilicate 3%~5%；Triisopropanolamine 4%~8%；PH tune
Save agent 1%~3%；Suspending agent 1%~2%；Surplus is water, and total amount supplies 100%.
It is further the raw material and each component mass percent of the present invention accelerator are as follows: aluminum sulfate 35%~40%；Water
Change calcium silicates 14%~18%；Lithium fluorosilicate 4%~5%；Triisopropanolamine 4%~6%；PH adjusting agent 1.5%~2.5%；
Suspending agent 1.5%~1.8%；Surplus is water, and total amount supplies 100%.The group is divided into preferred section component, and proportion is more scientific,
Effect is more outstanding.
It is further that aluminum sulfate of the present invention meets the requirement of HG/T2225-2001 " industrial aluminum sulphate " standard.
It is further that triisopropanolamine of the present invention meets GB/T27564-2011 " industrial triisopropanolamine " standard
Requirement.
It is further that hydrated calcium silicate partial size of the present invention is between 50~200nm；Fluorine content in the lithium fluorosilicate
Not less than 55%, insolubles content is less than 1%.It has higher requirements in inventive formulation to hydrated calcium silicate partial size, must reach and receive
Meter level, i.e., partial size is between 50~200nm.In inventive formulation to the content and insolubles content of fluorine in lithium fluorosilicate also have compared with
High request.
It is further that pH adjusting agent of the present invention is lysine, which is α-lysine.
It is further that suspending agent of the present invention is sepiolite (i.e. hydrous magnesium silicate), specification are as follows: partial size 200~
500nm。
A kind of preparation method of super hardening alkali-free liquid accelerator, the present invention preparation method the following steps are included:
1) it adds water in water bath containers and is heated to 60 DEG C~70 DEG C；
2) lithium fluorosilicate and aluminum sulfate is added；
3) triisopropanolamine is added；
4) pH adjusting agent and hydrated calcium silicate is added；
5) suspending agent is added under heat-retaining condition, persistently stirs 0.5h~1h, until liquid is that flaxen suspension is presented
Liquid；
6) high-speed shearing emulsion machine is added in light yellow suspension, revolving speed obtains super morning between 4000~6000r/min
Strong alkali-free liquid accelerator.Step 2) in the preparation method of accelerator of the present invention, 3), 4) in raw material added with sequencing
It is required that；And " until liquid is that flaxen suspension is presented " is very important technical characteristic point in step 5.
It is further in the above-mentioned preparation method of the present invention, in the step 2 of the preparation method, to add in water bath containers are added
When entering lithium fluorosilicate and aluminum sulfate, it should carry out continuing stirring；In the step 4 of preparation method, pH adjusting agent and aquation silicon is being added
When sour calcium, it should carry out continuing stirring；In the step 3 of preparation method, dropwise addition mode should be used when triisopropanolamine is added, that is, is used
Triisopropanolamine is slowly added dropwise in constant flow pump, and time for adding is 0.8h~1.2h.Preparation method step 2) of the present invention, 3), 4) in
Raw material addition should follow the technical requirements of the dropwise addition of lasting stirring, and time for adding is 0.8h~1.2h.
It is further involved raw material and each component mass percent in the present invention preparation method are as follows: aluminum sulfate 32%~
42%；Hydrated calcium silicate 10%~20%；Lithium fluorosilicate 3%~5%；Triisopropanolamine 4%~8%；PH adjusting agent 1%~
3%；Suspending agent 1%~2%；Surplus is water, and total amount supplies 100%.
Beneficial effects of the present invention are 1) alkali-free liquid accelerator of the invention is by general inorganic material, nano inorganic
It is obtained after material, the scientific matching combination of organic material, production.The proportion combination of its multiple material has superposition, synergistic effect,
Therefore the excellent effect of early strength with higher；2) the 6h intensity of alkali-free liquid accelerator of the invention, mortar is reachable
2.8MPa, 12h intensity are up to 6MPa, one day intensity 20MPa, and later strength is not lost, and anaphase effect is more significant；3) this hair
When the cooperation addition of the engineered cementitious of a variety of brands of bright accelerator and model, there is extraordinary adaptability；4) speed of the invention
Solidifying agent and the mass ratio that cement adds are smaller, are very beneficial for marketing；5) accelerator preparation method of the invention is used
Accelerator obtained is all able to satisfy standard requirements in setting time, early strength, later strength, and stationary phase is long, can guarantee 5
A month not crystallization, precipitating, using effect is constant, and the remote supermarket of the standard is of the same trade horizontal.6) production and processing cost of the invention
Belong to medium request in enterprise of the same trade with the requirement to equipment, the remarkable advantage based on its product highly in the industry cycle pushes away
Extensively.
Specific embodiment
The present invention is described in further details combined with specific embodiments below.The percent concentration is unless otherwise instructed
It is mass percent concentration.Embodiment is implemented under the premise of the technical scheme of the present invention, the detailed embodiment party provided
Formula and specific operation process, embodiment will be helpful to understand the present invention, but protection scope of the present invention is not limited to following realities
Apply example.
A kind of super hardening alkali-free liquid accelerator, the raw material and each component mass percent of the present invention accelerator are as follows: sulphur
Sour aluminium 32%~42%；Hydrated calcium silicate 10%~20%；Lithium fluorosilicate 3%~5%；Triisopropanolamine 4%~8%；PH tune
Save agent 1%~3%；Suspending agent 1%~2%；Surplus is water, and total amount supplies 100%.
It is further the raw material and each component mass percent of the present invention accelerator are as follows: aluminum sulfate 35%~40%；Water
Change calcium silicates 14%~18%；Lithium fluorosilicate 4%~5%；Triisopropanolamine 4%~6%；PH adjusting agent 1.5%~2.5%；
Suspending agent 1.5%~1.8%；Surplus is water, and total amount supplies 100%.The group is divided into preferred section component, and proportion is more scientific,
Effect is more outstanding.
It is further that aluminum sulfate of the present invention meets the requirement of HG/T2225-2001 " industrial aluminum sulphate " standard.
It is further that triisopropanolamine of the present invention meets GB/T27564-2011 " industrial triisopropanolamine " standard
Requirement.
It is further that hydrated calcium silicate partial size of the present invention is between 50~200nm；Fluorine content in the lithium fluorosilicate
Not less than 55%, insolubles content is less than 1%.It has higher requirements in inventive formulation to hydrated calcium silicate partial size, must reach and receive
Meter level, i.e., partial size is between 50~200nm.In inventive formulation to the content and insolubles content of fluorine in lithium fluorosilicate also have compared with
High request.
It is further that pH adjusting agent of the present invention is lysine, which is α-lysine.
It is further that suspending agent of the present invention is sepiolite (i.e. hydrous magnesium silicate), specification are as follows: partial size 200~
500nm。
A kind of preparation method of super hardening alkali-free liquid accelerator, the present invention preparation method the following steps are included:
1) it adds water in water bath containers and is heated to 60 DEG C~70 DEG C；
2) lithium fluorosilicate and aluminum sulfate is added；
3) triisopropanolamine is added；
4) pH adjusting agent and hydrated calcium silicate is added；
5) suspending agent is added under heat-retaining condition, persistently stirs 0.5h~1h, until liquid is that flaxen suspension is presented
Liquid；
6) high-speed shearing emulsion machine is added in light yellow suspension, revolving speed obtains super morning between 4000~6000r/min
Strong alkali-free liquid accelerator.Step 2) in the preparation method of accelerator of the present invention, 3), 4) in raw material added with sequencing
It is required that；And " until liquid is that flaxen suspension is presented " is very important technical characteristic point in step 5.
It is further in the above-mentioned preparation method of the present invention, in the step 2 of the preparation method, to add in water bath containers are added
When entering lithium fluorosilicate and aluminum sulfate, it should carry out continuing stirring；In the step 4 of preparation method, pH adjusting agent and aquation silicon is being added
When sour calcium, it should carry out continuing stirring；In the step 3 of preparation method, dropwise addition mode should be used when triisopropanolamine is added, that is, is used
Triisopropanolamine is slowly added dropwise in constant flow pump, and time for adding is 0.8h~1.2h.Preparation method step 2) of the present invention, 3), 4) in
Raw material addition should follow the technical requirements of the dropwise addition of lasting stirring, and time for adding is 0.8h~1.2h.
It is further involved raw material and each component mass percent in the present invention preparation method are as follows: aluminum sulfate 32%~
42%；Hydrated calcium silicate 10%~20%；Lithium fluorosilicate 3%~5%；Triisopropanolamine 4%~8%；PH adjusting agent 1%~
3%；Suspending agent 1%~2%；Surplus is water, and total amount supplies 100%.
The following are the comparative test of concrete operations and effect explanations.
Examples 1 to 6 super hardening alkali-free liquid accelerator and 1 raw material proportioning of comparative example are as shown in table 1:
1 super hardening alkali-free liquid accelerator raw material of table and proportion (numerical value is expressed as mass percent)
Application examples 1
Cement paste is added respectively with 4%~5% amount of cement weight in every kind of alkali-free quick-coagulant of Examples 1 to 6
In cement mortar sample, according to standard testing setting time of GB/T35159-2017 " gunite concrete accelerator " and anti-
The performance indicator of Compressive Strength, the standard requirements is shown in Table 2.
Alkali content is tested according to GB/T8077-2012 " Methods for testing uniformity of concrete admixture ".
With comparative example and a kind of domestic applications number 2011100000465 " high-performance chlorine-free alkali-free liquid accelerating agent " method system
Standby accelerator (code name HQ-1) is compareed, not add any accelerator as blank.
Cement paste setting time test proportion are as follows: reference cement: water=400:140.
Strength of cement mortar test proportion are as follows: reference cement: normal sand: water=900:1350:450.
The above water includes the water in accelerator, and water should deduct in accelerator according to actual measurement accelerator solid content when preparation
Water dosage.
Table 2 mixes the performance requirement of accelerator net slurry and hardened mortar
3 correlated performance detection result of table
Test result is as shown in table 3, and each embodiment alkali content is respectively less than 1%, belongs to alkali-free quick-coagulant.Each embodiment and sky
White example and comparative example are found after comparing.Alkali-free quick-coagulant early strength (6h, 12h, 1d compression strength) of the invention has greatly
Amplitude improves, and later strength is not lost.All embodiment 6h compression strength are both greater than 2MPa, and early strength have developed rapidly,
Corresponding blank example, the 6h compression strength of comparative example are less than 1MPa.HQ-1 alkali-free quick-coagulant as control is mixed identical
Under amount, although 1d intensity, 28d compressive strength rate, 90d compression strength retention rate all meet national standard, its 6h pressure resistance
Degree, 12h compression strength are still far below accelerator of the present invention.It can be seen that this product extreme early strength characteristics outstanding.
Test example 1 tests the present invention to the adaptability of engineered cementitious.
Test method is according to standard testing setting time of GB/T35159-2017 " gunite concrete accelerator " and anti-
Compressive Strength, cement use engineered cementitious, not mix the sample of accelerator as blank example, as a result as shown in table 4 below.
The adaptability of table 4 super hardening alkali-free quick-coagulant and engineered cementitious
By the test result of table 4, embodiment 4 has good adaptability to 9 kinds of engineered cementitious.When volume is 5%,
While indices meet GB/T35159-2017 " gunite concrete accelerator " national standard, also make the 6h of each cement anti-
Compressive Strength is more than 2MPa, and 12h compression strength is considerably beyond blank example.
The steady of alkali-free quick-coagulant of the present invention is surveyed according to GB/T35159-2017 " gunite concrete accelerator " appendix C method
Qualitative, the results are shown in Table 5.
The stability of 5 super hardening alkali-free liquid accelerator of table
Pass through the data of table 5, it is known that the stability of super hardening alkali-free liquid accelerator storage period of the invention is up to 5
Month.More than the stable storing phase of comparative example and commercially available alkali-free liquid accelerator.
It is above-described be only some embodiments of the invention (since formula of the invention belongs to numberical range, therefore
Embodiment cannot exhaustion, protection scope documented by the present invention wants the point range to be with numberical range and other technologies of the invention
It is quasi-), well known particular content or common sense do not describe excessively herein in scheme.It should be pointed out that above-described embodiment is not with any side
The formula limitation present invention, it is for those skilled in the art, all to be obtained by the way of equivalent substitution or equivalent transformation
Technical solution is fallen within the scope of protection of the present invention.This application claims protection scope should be with the content of its claim
Standard, the records such as specific embodiment in specification can be used for explaining the content of claim.
Claims (10)
1. a kind of super hardening alkali-free liquid accelerator, which is characterized in that the raw material and each component mass percent of the accelerator are as follows:
Aluminum sulfate 32%~42%；
Hydrated calcium silicate 10%~20%；
Lithium fluorosilicate 3%~5%；
Triisopropanolamine 4%~8%；
PH adjusting agent 1%~3%；
Suspending agent 1%~2%；
Surplus is water, and total amount supplies 100%.
2. a kind of super hardening alkali-free liquid accelerator according to claim 1, which is characterized in that the raw material of the accelerator
And each component mass percent are as follows:
Aluminum sulfate 35%~40%；
Hydrated calcium silicate 14%~18%；
Lithium fluorosilicate 4%~5%；
Triisopropanolamine 4%~6%；
PH adjusting agent 1.5%~2.5%；
Suspending agent 1.5%~1.8%；
Surplus is water, and total amount supplies 100%.
3. a kind of super hardening alkali-free liquid accelerator according to claim 1, which is characterized in that the aluminum sulfate meets
The requirement of HG/T2225-2001 " industrial aluminum sulphate " standard.
4. a kind of super hardening alkali-free liquid accelerator according to claim 1, which is characterized in that the triisopropanolamine is full
The requirement of sufficient GB/T27564-2011 " industrial triisopropanolamine " standard.
5. a kind of super hardening alkali-free liquid accelerator according to claim 1, which is characterized in that the hydrated calcium silicate grain
Diameter is between 50~200nm；Fluorine content is not less than 55% in the lithium fluorosilicate, and insolubles content is less than 1%.
6. a kind of super hardening alkali-free liquid accelerator according to claim 1, which is characterized in that the pH adjusting agent is
Lysine, the lysine are α-lysine.
7. a kind of super hardening alkali-free liquid accelerator according to claim 1, which is characterized in that the suspending agent is Hai Pao
Stone, specification are as follows: 200~500nm of partial size.
8. a kind of preparation method of super hardening alkali-free liquid accelerator, which is characterized in that the preparation method the following steps are included:
1) it adds water in water bath containers and is heated to 60 DEG C~70 DEG C；
2) lithium fluorosilicate and aluminum sulfate is added；
3) triisopropanolamine is added；
4) pH adjusting agent and hydrated calcium silicate is added；
5) suspending agent is added under heat-retaining condition, persistently stirs 0.5h~1h, until liquid is that flaxen suspension is presented；
6) high-speed shearing emulsion machine is added in light yellow suspension, revolving speed between 4000~6000r/min, obtain super hardening without
Alkali liquid quick-setting agent.
9. a kind of preparation method of super hardening alkali-free liquid accelerator according to claim 8, which is characterized in that the preparation
In the step 2 of method, when lithium fluorosilicate and aluminum sulfate being added in water bath containers are added, it should carry out continuing stirring；Preparation method
Step 4 in, pH adjusting agent is being added and when hydrated calcium silicate, should carry out continuing stirring；In the step 3 of preparation method, it is added
Dropwise addition mode should be used when triisopropanolamine, i.e., be slowly added dropwise triisopropanolamine using constant flow pump, time for adding be 0.8h~
1.2h。
10. a kind of preparation method of super hardening alkali-free liquid accelerator according to claim 8, which is characterized in that the system
Involved raw material and each component mass percent in Preparation Method are as follows:
Aluminum sulfate 32%~42%；
Hydrated calcium silicate 10%~20%；
Lithium fluorosilicate 3%~5%；
Triisopropanolamine 4%~8%；
PH adjusting agent 1%~3%；
Suspending agent 1%~2%；
Surplus is water, and total amount supplies 100%.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110510900A (en) * | 2019-09-12 | 2019-11-29 | 云南凯威特新材料股份有限公司 | A kind of modified villiaumite and its method for preparing gunite concrete low-alkali liquid quick-setting agent |
| CN110963736A (en) * | 2019-11-27 | 2020-04-07 | 江苏苏博特新材料股份有限公司 | Nano gel polyaluminium type liquid alkali-free accelerator and preparation method thereof |
| CN111253107A (en) * | 2020-01-19 | 2020-06-09 | 武汉理工大学 | Hydramine modified calcium silicate hydrate nano crystal nucleus early strength agent and preparation method thereof |
| CN111892327A (en) * | 2020-07-06 | 2020-11-06 | 江苏奥莱特新材料股份有限公司 | Liquid alkali-free accelerator and preparation method thereof |
| CN112142359A (en) * | 2020-09-25 | 2020-12-29 | 福泉凯威特新材料有限公司 | Dry and wet spraying concrete dual-purpose powdery alkali-free accelerator and preparation and use methods thereof |
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| CN110510900A (en) * | 2019-09-12 | 2019-11-29 | 云南凯威特新材料股份有限公司 | A kind of modified villiaumite and its method for preparing gunite concrete low-alkali liquid quick-setting agent |
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| CN110963736A (en) * | 2019-11-27 | 2020-04-07 | 江苏苏博特新材料股份有限公司 | Nano gel polyaluminium type liquid alkali-free accelerator and preparation method thereof |
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| CN111253107A (en) * | 2020-01-19 | 2020-06-09 | 武汉理工大学 | Hydramine modified calcium silicate hydrate nano crystal nucleus early strength agent and preparation method thereof |
| CN111892327A (en) * | 2020-07-06 | 2020-11-06 | 江苏奥莱特新材料股份有限公司 | Liquid alkali-free accelerator and preparation method thereof |
| CN112142359A (en) * | 2020-09-25 | 2020-12-29 | 福泉凯威特新材料有限公司 | Dry and wet spraying concrete dual-purpose powdery alkali-free accelerator and preparation and use methods thereof |
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|---|---|
| CN110078403B (en) | 2022-02-08 |
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