CN110436811A - A kind of chlorine-free alkali-free liquid accelerating agent and preparation method thereof - Google Patents
A kind of chlorine-free alkali-free liquid accelerating agent and preparation method thereof Download PDFInfo
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- CN110436811A CN110436811A CN201910754230.XA CN201910754230A CN110436811A CN 110436811 A CN110436811 A CN 110436811A CN 201910754230 A CN201910754230 A CN 201910754230A CN 110436811 A CN110436811 A CN 110436811A
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- free
- chlorine
- accelerating agent
- liquid accelerating
- free alkali
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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 chlorine-free alkali-free liquid accelerating agent and preparation method thereof, the chlorine-free alkali-free liquid accelerating agent is spare comprising steps of prepare aluminum fluosilicate；Aluminum fluosilicate is mixed with water, is stirred to react, obtains aluminum fluosilicate solution；Patent alum is added into aluminum fluosilicate solution, continues to stir, obtains stirring liquid；To stirring liquid in sequentially add stabilizer, surfactant and remaining water, be stirred to react, be cooled to room temperature to get.The resulting liquid accelerating agent chlorine-free alkali-free of the present invention solves the problems, such as that the loss of strong basicity bring late strength of concrete is big in existing accelerator, corrosivity is strong and polluting the environment property；And raw material is easy to get, is cheap, preparation method is simple, and production cost is low, mild condition, for resulting chlorine-free alkali-free liquid accelerating agent under 6% volume, glue grittiness can be considerably beyond standard requirements, one day mortar strength reaches 7Mpa or more, and later strength is not lost substantially, and rebound degree is down to 10% or less.
Description
Technical field
The present invention relates to construction and the field of building materials, and in particular to a kind of chlorine-free alkali-free liquid accelerating agent and its system
Preparation Method.
Background technique
Concrete accelerator is mainly used for the construction of gunite concrete, generally uses in tunnel, culvert, industrial and mineral construction,
Gunite concrete using when at nozzle be added make its quick-hardening, solidification.Traditional accelerator generally has strong basicity, although
Be able to satisfy the requirement of gunite concrete, but also bring many problems simultaneously: the loss of gunite concrete later strength is big, rotten
Corrosion is strong, furthermore may also result in environmental pollution, and especially to the pollution of groundwater environment, fugitive dust is more, springback capacity is big, is not easy to
Wet-mix for Shotcrete operation etc..
For these problems of alkaline accelerator, domestic many researchers have set about studying alkali free accelerator,
That is alkali-free quick-coagulant.Alkali-free quick-coagulant is generally weakly acidic, substantially reduces to skin corrosivity, increasingly reinforces in environmental protection ideas
Today, alkali-free quick-coagulant gradually replace alkaline accelerator to be trend of the times, and west American-European countries eliminates alkaline rapid hardening completely
Agent, there are also many countries also to vigorously promote the use alkali-free quick-coagulant.But the development of alkali-free quick-coagulant just starts to walk, skill
Art is also immature, and there are still many urgent problems.In addition, from the point of view of presently disclosed related patents, though partial monopoly
Entitled alkali-free quick-coagulant, but the alkali introduced in its formula is often beyond 1%.The higher one side of alkali content is right in concrete accelerator
Construction personnel causes corrosion to injure, and damages human health；On the other hand it may also cause alkali-aggregate reaction in concrete, lead to coagulation
Native later strength retention rate is less than 75%.
The accelerator early strength as disclosed in existing patent is lower, is easy to influence gunite concrete normal construction；Have
Patent disclosure accelerator volume it is larger, setting time is longer；Hydrofluoric acid used in some alkali-free quick-coagulants has pole
Strong corrosivity, people, which sucks steam or contacts skin, will cause burning of being difficult to cure, next introduces a large amount of magnesium sulfate and can lead
Cause sulfate radical excessive, easily leading to cement has biggish dilatancy, the decline of Yi Yinqi late strength of concrete.In conclusion developing
It develops a kind of real alkali-free and the concrete accelerator haveing excellent performance has great importance.
Summary of the invention
Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a kind of chlorine-free alkali-free liquid accelerating agent and
Preparation method, the liquid accelerating agent chlorine-free alkali-free solve strong basicity bring late strength of concrete in existing accelerator
The problem of loss is big, corrosivity is strong and polluting the environment property；And raw material is easy to get, is cheap, preparation method is simple,
Production cost is low, mild condition, and for resulting chlorine-free alkali-free liquid accelerating agent under 6% volume, glue grittiness can be considerably beyond GB/
The standard requirements of T35159-2017, one day mortar strength reach 7Mpa or more, and later strength is not lost substantially, rebound degree down to
10% hereinafter, long shelf-life.
In order to achieve the above object, the present invention is achieved by the following scheme.
(1) a kind of chlorine-free alkali-free liquid accelerating agent, including following raw material: aluminum fluosilicate, Patent alum, stabilization
Agent, surfactant and water.
Preferably, aluminium content is 1-30% in the aluminum fluosilicate, and fluosilicic acid content is 9-70% in the aluminum fluosilicate.
Preferably, alumina content is 14-17%, water in the Patent alum in the Patent alum
Content is divided to be no more than 4.5%.
Preferably, the stabilizer is diethanol monoisopropanolamine, monoisopropanolamine, diethanol amine or triethanolamine.
Preferably, the surfactant is dodecyldimethylamine oxide, lauryl amine polyoxyethylene ether or polyetheramine.
Preferably, the dosage of the raw material are as follows: aluminum fluosilicate 10-20%, Patent alum 35-50%, stabilizer 3-
7%, surfactant 0.5-1.5%, surplus are water.
(2) a kind of preparation method of chlorine-free alkali-free liquid accelerating agent, comprising the following steps:
Step 1, aluminum fluosilicate is prepared, it is spare；
Step 2, the aluminum fluosilicate is mixed with water, is stirred to react, obtains aluminum fluosilicate solution；
Step 3, Patent alum is added in Xiang Suoshu aluminum fluosilicate solution, continues to stir, obtain stirring liquid；
Step 4, stabilizer, surfactant and remaining water are sequentially added into the stirring liquid, is stirred to react, is cooled to room
Temperature obtains chlorine-free alkali-free liquid accelerating agent.
Preferably, in step 1, the preparation method of the aluminum fluosilicate includes following sub-step:
Fluosilicic acid, aluminium hydroxide and water are uniformly mixed, heating stirring to get；It wherein, include following dosage in aluminum fluosilicate
Raw material: 40-60% fluosilicic acid, 30-40% aluminium hydroxide, surplus are water.
It is further preferred that the temperature of the heating stirring is 55-70 DEG C, the revolving speed of heating stirring is 300-500rpm,
The time of heating stirring is 1h-2h.
Preferably, in step 2, the dosage of the water is 30%.
Preferably, in step 2, the temperature being stirred to react is 55-70 DEG C, and the revolving speed being stirred to react is 300-
500rpm, the time being stirred to react are 30-50min.
Preferably, in step 3, the temperature for continuing stirring is 55-70 DEG C, and the time for continuing stirring is 50-60min.
Preferably, in step 4, the temperature being stirred to react is 55-70 DEG C, and the time being stirred to react is 50-60min.
Compared with prior art, the invention has the benefit that
(1) chlorine-free alkali-free in the resulting liquid accelerating agent of the present invention, loses that small, corrosivity is small to late strength of concrete, will not
Environment is polluted, will not be detrimental to health, and do not influence accelerator to the condensation effect of concrete in the case where being not spiked with alkali
And shear strength.
(2) with Patent alum and aluminum fluosilicate for main rapid hardening component；Wherein, Patent alum can be shown
The presetting period for shortening cement is write, aluminum fluosilicate can significantly shorten the final setting time of cement.Meanwhile aluminum fluosilicate may additionally facilitate aluminium
The formation of sour tricalcium hyrate structure, improves the shear strength of concrete and the cohesive force of reinforcing bar.Stabilizer (diethanol list isopropyl
Hydramine) setting time of cement is shortened to a certain extent and greatly improves the 1d compression strength of mortar.Surfactant (ten
Dialkyl dimethyl amine oxide) it is strong cationic polyelectrolytes, cohesiveness is strong, and hydrolytic stability is good, can increase substantially speed
The Stability and adaptability of solidifying agent, and concrete coagulation speed can be significantly improved, reduce concrete slump loss.
(3) the resulting chlorine-free alkali-free liquid accelerating agent of the present invention is good to ordinary portland cement adaptability, and condensation is fast, and one day
Intensity, later strength are not lost substantially；It is pollution-free in its preparation process, it is a kind of novel ground without external discarded discharge of wastewater
Lower engineering gunite concrete quick-set.
Specific embodiment
Embodiment of the present invention is described in detail below in conjunction with embodiment, but those skilled in the art will
It will be appreciated that the following example is merely to illustrate the present invention, and it is not construed as limiting the scope of the invention.
Embodiment 1
A kind of preparation method of chlorine-free alkali-free liquid accelerating agent, comprising the following steps:
Step 1, it prepares aluminum fluosilicate: 48% fluosilicic acid, 32% aluminium hydroxide (industrial primes) and 20% being added into reaction kettle certainly
Water, heating stirring 1.5h under the conditions of temperature is 60 DEG C, revolving speed is 400 rpm, obtains aluminum fluosilicate.
Step 2,10% aluminum fluosilicate is mixed with 30% water, is stirred under the conditions of temperature is 60 DEG C, revolving speed is 400 rpm anti-
40min is answered, aluminum fluosilicate is completely dissolved, obtains aluminum fluosilicate solution.
Step 3,50% Patent alum is added into aluminum fluosilicate solution, temperature be 60 DEG C, revolving speed 400
Continue to stir 55min under the conditions of rpm, obtains stirring liquid.
Step 4,5% diethanol monoisopropanolamine, 1% dodecyldimethylamine oxide are sequentially added into stirring liquid and are remained
Remaining water is stirred to react 1h under the conditions of temperature is 60 DEG C, revolving speed is 400 rpm, it is complexed sufficiently, is cooled to room temperature, obtains
Chlorine-free alkali-free liquid accelerating agent.
Embodiment 2
A kind of preparation method of chlorine-free alkali-free liquid accelerating agent, comprising the following steps:
Step 1, it prepares aluminum fluosilicate: 48% fluosilicic acid, 32% aluminium hydroxide (industrial primes) and 20% being added into reaction kettle certainly
Water, heating stirring 1h under the conditions of temperature is 60 DEG C, revolving speed is 400 rpm, obtains aluminum fluosilicate.
Step 2,20% aluminum fluosilicate is mixed with 30% water, is stirred under the conditions of temperature is 60 DEG C, revolving speed is 400 rpm anti-
40min is answered, aluminum fluosilicate is completely dissolved, obtains aluminum fluosilicate solution.
Step 3,40% Patent alum is added into aluminum fluosilicate solution, temperature be 60 DEG C, revolving speed 400
Continue to stir 55min under the conditions of rpm, obtains stirring liquid.
Step 4, to stirring liquid in sequentially add 3% diethanol monoisopropanolamine, 1.5% dodecyldimethylamine oxide and
Remaining water is stirred to react 1h under the conditions of temperature is 60 DEG C, revolving speed is 400 rpm, it is complexed sufficiently, is cooled to room temperature,
Obtain chlorine-free alkali-free liquid accelerating agent.
Embodiment 3
A kind of preparation method of chlorine-free alkali-free liquid accelerating agent, comprising the following steps:
Step 1, it prepares aluminum fluosilicate: 53% fluosilicic acid, 37% aluminium hydroxide (industrial primes) and 10% being added into reaction kettle certainly
Water, heating stirring 2h under the conditions of temperature is 60 DEG C, revolving speed is 400 rpm, obtains aluminum fluosilicate.
Step 2,20% aluminum fluosilicate is mixed with 30% water, is stirred under the conditions of temperature is 60 DEG C, revolving speed is 400 rpm anti-
40min is answered, aluminum fluosilicate is completely dissolved, obtains aluminum fluosilicate solution.
Step 3,40% Patent alum is added into aluminum fluosilicate solution, temperature be 60 DEG C, revolving speed 400
Continue to stir 55min under the conditions of rpm, obtains stirring liquid.
Step 4,5% diethanol monoisopropanolamine, 1% dodecyldimethylamine oxide are sequentially added into stirring liquid and are remained
Remaining water is stirred to react 1h under the conditions of temperature is 60 DEG C, revolving speed is 400 rpm, it is complexed sufficiently, is cooled to room temperature, obtains
Chlorine-free alkali-free liquid accelerating agent.
Embodiment 4
A kind of preparation method of chlorine-free alkali-free liquid accelerating agent, comprising the following steps:
Step 1, it prepares aluminum fluosilicate: 40% fluosilicic acid, 40% aluminium hydroxide (industrial primes) and 20% being added into reaction kettle certainly
Water, heating stirring 1h under the conditions of temperature is 55 DEG C, revolving speed is 500 rpm, obtains aluminum fluosilicate.
Step 2,15% aluminum fluosilicate is mixed with 30% water, is stirred under the conditions of temperature is 55 DEG C, revolving speed is 500 rpm anti-
30min is answered, aluminum fluosilicate is completely dissolved, obtains aluminum fluosilicate solution.
Step 3,35% Patent alum is added into aluminum fluosilicate solution, temperature be 55 DEG C, revolving speed 500
Continue to stir 60min under the conditions of rpm, obtains stirring liquid.
Step 4, to stirring liquid in sequentially add 7% monoisopropanolamine, 1.5% lauryl amine polyoxyethylene ether (AC-1210) and
Remaining water is stirred to react 50min under the conditions of temperature is 55 DEG C, revolving speed is 500 rpm, it is complexed sufficiently, is cooled to room
Temperature obtains chlorine-free alkali-free liquid accelerating agent.
Embodiment 5
A kind of preparation method of chlorine-free alkali-free liquid accelerating agent, comprising the following steps:
Step 1, it prepares aluminum fluosilicate: 60% fluosilicic acid, 30% aluminium hydroxide (industrial primes) and 10% being added into reaction kettle certainly
Water, heating stirring 2h under the conditions of temperature is 70 DEG C, revolving speed is 300 rpm, obtains aluminum fluosilicate.
Step 2,10% aluminum fluosilicate is mixed with 30% water, is stirred under the conditions of temperature is 70 DEG C, revolving speed is 300 rpm anti-
50min is answered, aluminum fluosilicate is completely dissolved, obtains aluminum fluosilicate solution.
Step 3,42% Patent alum is added into aluminum fluosilicate solution, temperature be 70 DEG C, revolving speed 300
Continue to stir 60min under the conditions of rpm, obtains stirring liquid.
Step 4,7% diethanol amine, 0.5% polyetheramine (ED-600) and remaining water are sequentially added into stirring liquid, in temperature
Degree is 70 DEG C, revolving speed is stirred to react 1h under the conditions of being 300 rpm, it is complexed sufficiently, is cooled to room temperature, obtains chlorine-free alkali-free liquid
Accelerator.
Comparative example 1
Conventional alkali-free quick-coagulant raw material forms on the market: aluminum sulfate, ethylenediamine, polyethylene glycol, water；
Preparation method: aluminum sulfate is ground into processing, crosses 80~300 meshes, the mixed solution of ethylenediamine, polyethylene glycol and water is added
In, it is dissolved under the conditions of 40~100 DEG C, while with high speed agitator strong stirring 10~30 minutes, after mixing evenly again with cream
Change machine emulsifies 5~10 minutes to get required alkali-free liquid accelerating agent is arrived.
According to the requirement of national GB/T35159-2017 " gunite concrete accelerator " professional standard, to embodiment 1-3
Resulting chlorine-free alkali-free liquid accelerating agent carries out the test of cement paste setting time, wherein 400g Lafarge is used in test
Po42.5 cement and 160g water, test result are as shown in table 1.
Mortar strength test is carried out to the resulting chlorine-free alkali-free liquid accelerating agent of embodiment 1-3, wherein use in test
900g Lafarge cement, 1350g normal sand and 450g, test result are as shown in table 1.
Chlorine-free alkali-free liquid accelerating agent is added according to the 6% of cement weight, to the blank sand for not adding accelerator in strength test
Slurry has also carried out strength test, as a result as follows to test 28 days intensity ratios mixed with mortar and its:
Table 1
As shown in Table 1, the resulting chlorine-free alkali-free liquid accelerating agent of the present invention is under 6% volume, when can make the condensation of cement paste
Between meet the presetting period less than 5 minutes, Industry code requirements of the final setting time less than 12 minutes；And one day mortar strength can be made
Reach 12Mpa or more, considerably beyond the 7Mpa in standard, intensity ratio can reach 97% or more within 28 days.
The presetting period of the resulting chlorine-free alkali-free liquid accelerating agent of embodiment 1-3 and final setting time are significantly lower than comparative example 1
In existing conventional alkali-free quick-coagulant, show that the setting time of the resulting chlorine-free alkali-free liquid accelerating agent of the present invention is shorter, to water
The condensation effect of mud is more preferable.And 1 day intensity of the resulting chlorine-free alkali-free liquid accelerating agent of embodiment 1-3 is apparently higher than comparative example 1
In existing conventional alkali-free quick-coagulant, show that the compression strength of the resulting chlorine-free alkali-free liquid accelerating agent of the present invention is higher.
Although the present invention is described in detail with a general description of the specific embodiments in this specification,
But on the basis of the present invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.
Therefore, these modifications or improvements without departing from theon the basis of the spirit of the present invention, belong to claimed model
It encloses.
Claims (10)
1. a kind of chlorine-free alkali-free liquid accelerating agent, which is characterized in that including following raw material: aluminum fluosilicate, Patent alum,
Stabilizer, surfactant and water.
2. chlorine-free alkali-free liquid accelerating agent according to claim 1, which is characterized in that aluminium content is in the aluminum fluosilicate
1-30%, fluosilicic acid content is 9-70% in the aluminum fluosilicate；Alumina content is 14-17% in the Patent alum,
Moisture content is no more than 4.5% in the Patent alum.
3. chlorine-free alkali-free liquid accelerating agent according to claim 1, which is characterized in that the stabilizer is diethanol Dan Yi
Propanolamine, monoisopropanolamine, diethanol amine or triethanolamine.
4. chlorine-free alkali-free liquid accelerating agent according to claim 1, which is characterized in that the surfactant is dodecane
Base dimethyl amine, lauryl amine polyoxyethylene ether or polyetheramine.
5. chlorine-free alkali-free liquid accelerating agent according to claim 1, which is characterized in that the dosage of the raw material are as follows: fluorine silicon
Sour aluminium 10-20%, Patent alum 35-50%, stabilizer 3-7%, surfactant 0.5-1.5%, surplus are water.
6. a kind of preparation method of chlorine-free alkali-free liquid accelerating agent, which comprises the following steps:
Aluminum fluosilicate is prepared, it is spare；
The aluminum fluosilicate is mixed with water, is once stirred to react, obtains aluminum fluosilicate solution；
Patent alum is added into the aluminum fluosilicate solution, continues to stir, obtains stirring liquid；
Stabilizer, surfactant and remaining water are sequentially added into the stirring liquid, secondary agitation reaction is cooled to room
Temperature obtains chlorine-free alkali-free liquid accelerating agent.
7. the preparation method of chlorine-free alkali-free liquid accelerating agent according to claim 6, which is characterized in that the aluminum fluosilicate
Preparation method, include following sub-step:
Fluosilicic acid, aluminium hydroxide and water are uniformly mixed, heated under the conditions of temperature is 55-70 DEG C, revolving speed is 300-500rpm
Stir 1h-2h to get；It wherein, include the raw material of following dosage: 40-60% fluosilicic acid, 30-40% aluminium hydroxide in aluminum fluosilicate,
Surplus is water.
8. the preparation method of chlorine-free alkali-free liquid accelerating agent according to claim 6, which is characterized in that by the fluosilicic acid
Aluminium mixed with water in water dosage be 30%；The temperature being once stirred to react is 55-70 DEG C, the revolving speed being once stirred to react
For 300-500rpm, the time being once stirred to react is 30-50min.
9. the preparation method of chlorine-free alkali-free liquid accelerating agent according to claim 6, which is characterized in that described to continue to stir
Temperature be 55-70 DEG C, continue stirring time be 50-60min.
10. the preparation method of chlorine-free alkali-free liquid accelerating agent according to claim 6, which is characterized in that described secondary to stir
The temperature for mixing reaction is 55-70 DEG C, and the time of secondary agitation reaction is 50-60min.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111704381A (en) * | 2020-06-15 | 2020-09-25 | 江西渠成氟化学有限公司 | Preparation method of alkali-free accelerator |
| CN114057422A (en) * | 2021-12-22 | 2022-02-18 | 云南云天化股份有限公司 | Alkali-free fluorine-free chlorine-free liquid concrete accelerator and preparation method thereof |
| CN114835425A (en) * | 2022-03-23 | 2022-08-02 | 中铁第一勘察设计院集团有限公司 | Liquid alkali-free accelerator and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107140867A (en) * | 2017-07-15 | 2017-09-08 | 王宇青 | Increasing material manufacturing building, structures or its component alkali-free quick-coagulant |
| CN107200496A (en) * | 2017-07-17 | 2017-09-26 | 云南峰高新材料有限公司 | A kind of environment-friendly type alkali-free accelerator and preparation method thereof |
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- 2019-08-15 CN CN201910754230.XA patent/CN110436811A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107140867A (en) * | 2017-07-15 | 2017-09-08 | 王宇青 | Increasing material manufacturing building, structures or its component alkali-free quick-coagulant |
| CN107200496A (en) * | 2017-07-17 | 2017-09-26 | 云南峰高新材料有限公司 | A kind of environment-friendly type alkali-free accelerator and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111704381A (en) * | 2020-06-15 | 2020-09-25 | 江西渠成氟化学有限公司 | Preparation method of alkali-free accelerator |
| CN114057422A (en) * | 2021-12-22 | 2022-02-18 | 云南云天化股份有限公司 | Alkali-free fluorine-free chlorine-free liquid concrete accelerator and preparation method thereof |
| CN114835425A (en) * | 2022-03-23 | 2022-08-02 | 中铁第一勘察设计院集团有限公司 | Liquid alkali-free accelerator and preparation method thereof |
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