CN108249801A - There is alkali accelerator and preparation method thereof - Google Patents
There is alkali accelerator and preparation method thereof Download PDFInfo
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- CN108249801A CN108249801A CN201810065849.5A CN201810065849A CN108249801A CN 108249801 A CN108249801 A CN 108249801A CN 201810065849 A CN201810065849 A CN 201810065849A CN 108249801 A CN108249801 A CN 108249801A
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- sodium
- accelerator
- component
- triisopropanolamine
- zinc oxide
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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
-
- 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
It is a kind of to there is alkali accelerator to be related to a kind of additive of concrete, more particularly to a kind of accelerator containing alkali for being capable of concrete set time sanctified by usage.Accelerator is essential additive in architectural engineering, the shortening concrete that high degree is capable of in the use of accelerator becomes the solid time from slurry, especially in winter and weather it is colder area can shorten the time of concrete setting so as to speed up the work, shorten the construction period.The present invention prepares accelerator using sodium hydroxide, sodium metasilicate as base-material, and the auxiliary addition agents such as sodium carbonate, potassium bichromate, zinc oxide, triisopropanolamine, potassium aluminate, calcium acrylate, sodium aluminate are added in system as additive to reach enhancing late strength of concrete and inhibit slump and other effects.
Description
Technical field
The present invention relates to concrete admixture field, more particularly to a kind of preparation of concrete accelerator.
Background technology
The utilization of accelerator can effectively reduce the setting time of cement so as to reduce the duration, speed up the work.And
Since the 1930s for the first time invention accelerator, the development and utilization of accelerator are very fast.But the hair of China's accelerator
Exhibition is but relatively slower, and the accelerator in China is mainly with " Red Star-Ι types " and " 728 type " for representative.And in current China's concrete speed
Solidifying agent on the market there are pulvis accelerator and the accelerator of liquid accelerator two categories, compare with liquid accelerator and
Speech, the accelerator of pulvis is deposited disperses uneven, the shortcomings of dust pollution is big, and resilience is big in use.Therefore, it is of the invention
It is dedicated to a kind of preparation of liquid accelerator.
Chinese invention patent CN1974466A discloses a kind of preparation of accelerator, by by aluminum sulfate, magnesium sulfate
Wait sulfate that hydramine, stabilizer, antifoaming agent etc. is added to prepare a kind of accelerator of alkali-free as the auxiliary agent of reaction again as base-material.It should
It invents the shortcomings that accelerator prepared also can effectively evade pulvis accelerator for liquid accelerator and reduces accelerator pair
The corrosion of material in concrete, but such accelerator but the shortcomings that big later strength loss, this affects concrete
Quality.
China Building Material Scientific Research General Institute patent CN201110112424 discloses a kind of alkali-free liquid accelerator
It prepares, this accelerator can effectively reduce the time of concrete coagulation and also be able to improve injection layer thickness, but pass through
Practical detection finds loss of strength can be caused serious in the later stage used using the concrete of this accelerator.
Invention content
The defects of purpose of the present invention is intended to overcome the prior art, providing a kind of can effectively shorten the solidifying of concrete
Gu the time, and have alkali accelerator to what the later strength of concrete did not made a difference.
It is of the present invention to have alkali accelerator, it is main composed of the following components：Sodium hydroxide, deionized water, sodium metasilicate, carbon
Sour sodium, potassium bichromate, zinc oxide, sodium aluminate, triisopropanolamine, calcium acrylate, their weight percent are：Sodium hydroxide
40-50%, deionized water 35-40%, sodium metasilicate 10-15%, sodium carbonate 2-6%, potassium bichromate 0.1-0.3%, zinc oxide 0.1-
0.2%th, sodium aluminate 0.1-0.3%, triisopropanolamine 0.2-0.4%, calcium acrylate 0.1-0.3%.
It is described have alkali accelerator component weight percent be：Sodium hydroxide 45%, deionized water 37%, sodium metasilicate 13.5%,
Sodium carbonate 3.5%, potassium bichromate 0.2%, zinc oxide 0.1%, sodium aluminate 0.2%, triisopropanolamine 0.3%, calcium acrylate 0.2%.
Of the present invention to have alkali accelerator, the characteristic of institute's addO-on therapy is as follows：
1st, sodium hydroxide：Sodium hydroxide can make cement with mainly playing the gypsum generation sodium sulphate of deferred action in cement
In rise deferred action gypsum content reduce, play the role of rapid hardening so as to enhance the setting rate of cement.
2nd, deionized water：Good dispersant can effectively dissolve the reaction product in reaction process, accelerate reaction
Rate makes reaction carry out more complete.
3rd, sodium metasilicate：Sodium metasilicate is as a kind of water soluble salt, and intensity is good and acidproof and it can be with the calcium in concrete
Ionization generates precipitated calcium silicate and accelerates the solidification of cement, but the dosage of sodium metasilicate will be controlled in rational range
Within.
4th, sodium carbonate：Sodium carbonate is added in accelerator system, can act on and generate with the calcium oxide in concrete system
The lower polcarb of solubility and make cement rapid hardening.
5th, potassium bichromate：Potassium bichromate is good cement hardener, adds in body of the fraction of potassium bichromate in accelerator
It can accelerate the hydrolysis of main component in cement in system and be cured cement acceleration.
6th, zinc oxide：The additive of accelerator can also enhance cement other than it can shorten the firm time of cement
Water resistance.
7th, sodium aluminate：Sodium aluminate can be that aluminate group, aluminate group are added in system as an auxiliary additive
Generation calcium aluminate can be reacted with the calcium ion in system, the generation of calcium aluminate can effectively reduce the calcium hydroxide of system
Content is so as to accelerate C3The aquation of S.And C3S can generate a large amount of heat of hydration during aquation, increase the temperature of system
And accelerate the solidification of cement.
8th, triisopropanolamine：Triisopropanolamine is the additive of good cement additive, and effect mainly has following several
Point.First, triisopropanolamine can effectively reduce the energy consumption in reaction process.Second, the addition of triisopropanolamine can have
The intensity of the increase cement of effect reduces the volume of additive.Third, triisopropanolamine has excellent stereoeffect, have
Strong peptizaiton can effectively accelerate the process of reaction.Fourth, triisopropanolamine can effectively reduce the sum of injection slurry
Easy property and early strength, reduce early stage viscosity.
9th, calcium acrylate：Calcium acrylate can be effectively promoted C3Early stage entringite is accelerated in the hydrolysis of S（AFt）Generation,
It also is able to that complexing occurs and generates complex compound so as to accelerate the rapid hardening of cement with the calcium ion in system.And calcium acrylate
Addition also be able to effectively accelerate cement later stage C3The hydrolysis of S enhances cement later strength.
The present invention using sodium hydroxide, sodium metasilicate as this accelerator base-material, and herein basis on add sodium carbonate,
The auxiliary agents such as potassium bichromate, zinc oxide, triisopropanolamine, potassium aluminate, calcium acrylate, sodium aluminate help out with play accelerate with
Calcium ion effect generation indissoluble salt and promotion C in cement3The effects that S aquations.
Based on forming by alkali accelerator, and implementation steps of the present invention in specific operating process are：
Described has alkali accelerator, and preparation method is：It stocks up according to above-mentioned weight percent, the specific steps are：
A, in a kettle according to the components by weight percent designed by one be separately added into 45% sodium hydroxide, 35% water, 13.5% sodium metasilicate,
Temperature is simultaneously heated to 85 DEG C by 3.5% sodium carbonate；
B, it is spare that two component of A, B is prepared respectively.Specially 0.2% potassium bichromate of component A, 0.1% zinc oxide, 0.2% sodium aluminate；B groups
It is divided into 0.3% triisopropanolamine, 0.2% calcium acrylate；
C, treat that all dissolving after mixing, adds in two component of A, B prepared in advance in 2, control to basic components added in 1
When a length of 30min of addition；
D, after the completion for the treatment of that two component of A, B adds in, 85 DEG C are kept the temperature at, and keep the temperature 150min；
E, it treats after reaction, it is after detection is qualified that reaction product immigration liquid storage kettle is spare by reaction product taking-up backup detection.
（Two）Component design features：
1st, sodium hydroxide, sodium metasilicate, sodium carbonate is as the base-material for preparing this accelerator, can effectively with it is effective in cement
Ingredient reacts and achievees the effect that rapid hardening.First, sodium hydroxide is had an effect with gypsum generates indissoluble salt, it is effectively reduced
The content of the gypsum of deferred action is played in system, so as to accelerate the rapid hardening of cement；Second, sodium metasilicate is added in introduce silicate,
Silicate can generate precipitated calcium silicate and rapid hardening with the calcium ion in concrete system；Third, the carbonate in sodium carbonate is tender
With the calcium ion generation more polcarb of indissoluble and rapid hardening.
2nd, the design of component A：Potassium bichromate enhancing oxidation is added in after base-material to be reacted and the dissolving of basic auxiliary agent
Property while accelerate cement curing；Sodium aluminate is to provide aluminate in system to effectively generate calcium aluminate, reduces system
The content of middle calcium hydroxide promotes C3The aquation of S accelerates the rapid hardening of cement.
3rd, the design of B component：Triisopropanolamine is added in B component, can out increase the workability of gunite concrete
And other than early strength, since triisopropanolamine has good space structure and dispersibility, rapid hardening can be effectively reduced
Volume of the agent in cement；Calcium acrylate can promote entringite in early stage（AFt）Generation, accelerate C3The aquation of S, and its
Duration it is longer, can effectively enhance the later strength of concrete.
It is weak base concrete accelerator that the present invention designed, which has alkali accelerator, and such accelerator can effectively shorten coagulation
The setting time of soil, and do not make a difference to the later strength of concrete.On benchmark formula, the present invention is in the mistake used
The naphthalene sulfonic acid-formaldehyde condensation product for being combined with water-reducing property in journey again uses, in addition to can effectively also be able to very other than diminishing
Good humidification, and this is also the bright spot of the present invention.Accelerator of this formula is at present in a large amount of production, in reality
It can also reach expected using effect during the use on border.
Specific embodiment
With reference to embodiment, the present invention is described further, but not limited to the examples.
Embodiment 1
One kind has alkali accelerator, main composed of the following components：Sodium hydroxide, deionized water, sodium metasilicate, sodium carbonate, dichromic acid
Potassium, zinc oxide, sodium aluminate, triisopropanolamine, calcium acrylate, it is characterised in that their weight percent is：Sodium hydroxide
47%th, deionized water 40%, sodium metasilicate 10%, sodium carbonate 2%, potassium bichromate 0.1%, zinc oxide 0.2%, sodium aluminate 0.1%, three isopropyls
Hydramine 0.4%, calcium acrylate 0.2%.
Embodiment 2
One kind has alkali accelerator, main composed of the following components：Sodium hydroxide, deionized water, sodium metasilicate, sodium carbonate, dichromic acid
Potassium, zinc oxide, sodium aluminate, triisopropanolamine, calcium acrylate, it is characterised in that their weight percent is：Sodium hydroxide
43%th, deionized water 35%, sodium metasilicate 15%, sodium carbonate 6%, potassium bichromate 0.3%, zinc oxide 0.1%, sodium aluminate 0.3%, three isopropyls
Hydramine 0.2%, calcium acrylate 0.1-%.
Embodiment 3
Based on forming by alkali accelerator, and implementation steps of the present invention in specific operating process are：
First, it is obtained according to test of many times test and prepares the weight configuration that this accelerator is required each component：Sodium hydroxide 45%,
Deionized water 35%, sodium metasilicate 13.5%, sodium carbonate 3.5%, for convenience of state, by 0.2% potassium bichromate, 0.1% zinc oxide,
0.2% sodium aluminate and 1% deionized water are summarized as component A；0.3% triisopropanolamine, 0.2% calcium acrylate and 1% are gone
Ionized water is summarized as B component.
2nd, the operation of reaction is prepared：
（One）Specific steps prepared by a kind of accelerator：
A, in a kettle according to the components by weight percent designed by one be separately added into 45% sodium hydroxide, 35% water, 13.5% sodium metasilicate,
Temperature is simultaneously heated to 85 DEG C by 3.5% sodium carbonate；
B, it is spare that two component of A, B is prepared respectively.Specially 0.2% potassium bichromate of component A, 0.1% zinc oxide, 0.2% sodium aluminate；B groups
It is divided into 0.3% triisopropanolamine, 0.2% calcium acrylate；
C, treat that all dissolving after mixing, adds in two component of A, B prepared in advance in 2, control to basic components added in 1
When a length of 30min of addition；
D, after the completion for the treatment of that two component of A, B adds in, 85 DEG C are kept the temperature at, and keep the temperature 150min；
E, it treats after reaction, it is after detection is qualified that reaction product immigration liquid storage kettle is spare by reaction product taking-up backup detection.
（Three）The basic nature testing result comparison for having alkali accelerator see the table below.
Table 1 is each accelerator basic performance contrast table：
2 volume of table is 6% each performance comparison table of accelerator
3 volume of table is 5% each performance comparison table of accelerator
4 volume of table is 4% each performance comparison table of accelerator
It is found according to detection comparing result, can ensure that the properties of concrete refer to accelerator prepared by the formula of the present invention
Loss of strength up to standard, and can effectively controlling the coagulation later stage is marked, therefore, is had with accelerator prepared by this formula good
Using and economic benefit.
Claims (3)
1. one kind has alkali accelerator, main composed of the following components：Sodium hydroxide, deionized water, sodium metasilicate, sodium carbonate, weight chromium
Sour potassium, zinc oxide, sodium aluminate, triisopropanolamine, calcium acrylate, it is characterised in that their weight percent is：Sodium hydroxide
40-50%, deionized water 35-40%, sodium metasilicate 10-15%, sodium carbonate 2-6%, potassium bichromate 0.1-0.3%, zinc oxide 0.1-
0.2%th, sodium aluminate 0.1-0.3%, triisopropanolamine 0.2-0.4%, calcium acrylate 0.1-0.3%.
2. according to claim 1 have alkali accelerator, which is characterized in that the weight percent of its each component is：Hydroxide
Sodium 45%, deionized water 37%, sodium metasilicate 13.5%, sodium carbonate 3.5%, potassium bichromate 0.2%, zinc oxide 0.1%, sodium aluminate 0.2%,
Triisopropanolamine 0.3%, calcium acrylate 0.2%.
3. according to claim 1 have alkali accelerator, the weight configuration of each component：Sodium hydroxide 45%, deionized water 35%,
Sodium metasilicate 13.5%, sodium carbonate 3.5%, for convenience of stating, by 0.2% potassium bichromate, 0.1% zinc oxide, 0.2% sodium aluminate
Deionized water with 1% is summarized as component A；0.3% triisopropanolamine, 0.2% calcium acrylate and 1% deionized water are summarized as
B component；It is characterized in that, the specific steps of its preparation：
A, in a kettle according to the components by weight percent designed by one be separately added into 45% sodium hydroxide, 35% water, 13.5% sodium metasilicate,
Temperature is simultaneously heated to 85 DEG C by 3.5% sodium carbonate；
B, it is spare that two component of A, B is prepared respectively；Specially 0.2% potassium bichromate of component A, 0.1% zinc oxide, 0.2% sodium aluminate；B groups
It is divided into 0.3% triisopropanolamine, 0.2% calcium acrylate；
C, treat that all dissolving after mixing, adds in two component of A, B prepared in advance in 2, control to basic components added in 1
When a length of 30min of addition；
D, after the completion for the treatment of that two component of A, B adds in, 85 DEG C are kept the temperature at, and keep the temperature 150min；
E, it treats after reaction, it is after detection is qualified that reaction product immigration liquid storage kettle is spare by reaction product taking-up backup detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810065849.5A CN108249801A (en) | 2018-01-23 | 2018-01-23 | There is alkali accelerator and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810065849.5A CN108249801A (en) | 2018-01-23 | 2018-01-23 | There is alkali accelerator and preparation method thereof |
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| Publication Number | Publication Date |
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| CN108249801A true CN108249801A (en) | 2018-07-06 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810065849.5A Withdrawn CN108249801A (en) | 2018-01-23 | 2018-01-23 | There is alkali accelerator and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110818310A (en) * | 2019-10-24 | 2020-02-21 | 中建西部建设西南有限公司 | Concrete glue reducing agent and preparation method and application thereof |
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| WO2003078347A2 (en) * | 2002-03-13 | 2003-09-25 | W.R. Grace & Co.-Conn | Beneficiated water reducing compositions |
| CN105198273A (en) * | 2015-11-02 | 2015-12-30 | 宋介珍 | Concrete compound type chloride-free early strength agent and preparation method thereof |
| CN106082750A (en) * | 2016-06-02 | 2016-11-09 | 石家庄市长安育才建材有限公司 | Gunite concrete low resilience liquid accelerator and preparation method thereof |
| CN106630725A (en) * | 2016-12-01 | 2017-05-10 | 江苏苏博特新材料股份有限公司 | Liquid accelerated agent for sprayed concrete and preparation method of liquid accelerated agent |
| CN107601948A (en) * | 2017-09-28 | 2018-01-19 | 中国建材检验认证集团厦门宏业有限公司 | A kind of gunite concrete low-alkaline liquid accelerating agent and preparation method thereof |
-
2018
- 2018-01-23 CN CN201810065849.5A patent/CN108249801A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003078347A2 (en) * | 2002-03-13 | 2003-09-25 | W.R. Grace & Co.-Conn | Beneficiated water reducing compositions |
| CN105198273A (en) * | 2015-11-02 | 2015-12-30 | 宋介珍 | Concrete compound type chloride-free early strength agent and preparation method thereof |
| CN106082750A (en) * | 2016-06-02 | 2016-11-09 | 石家庄市长安育才建材有限公司 | Gunite concrete low resilience liquid accelerator and preparation method thereof |
| CN106630725A (en) * | 2016-12-01 | 2017-05-10 | 江苏苏博特新材料股份有限公司 | Liquid accelerated agent for sprayed concrete and preparation method of liquid accelerated agent |
| CN107601948A (en) * | 2017-09-28 | 2018-01-19 | 中国建材检验认证集团厦门宏业有限公司 | A kind of gunite concrete low-alkaline liquid accelerating agent and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110818310A (en) * | 2019-10-24 | 2020-02-21 | 中建西部建设西南有限公司 | Concrete glue reducing agent and preparation method and application thereof |
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Application publication date: 20180706 |