CN108178547A - A kind of CSH gel-types early strength agent and its purification redisperse preparation method - Google Patents
A kind of CSH gel-types early strength agent and its purification redisperse preparation method Download PDFInfo
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- CN108178547A CN108178547A CN201711474825.7A CN201711474825A CN108178547A CN 108178547 A CN108178547 A CN 108178547A CN 201711474825 A CN201711474825 A CN 201711474825A CN 108178547 A CN108178547 A CN 108178547A
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- Prior art keywords
- csh
- strength agent
- early strength
- gels
- mixed
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Classifications
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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
- C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
-
- 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)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
A kind of CSH gel-types early strength agent of the present invention and its purification redisperse preparation method, belong to technical field of concrete additives.The problem of can not taking into account control alkali content for existing CSH gel-types early strength agent and ensure its active ingredient and bad dispersibility.This method is mixed by answering for lauryl sodium sulfate and High-efficiency polycarboxylic acid based water reducer, it can be achieved that the uniform and stable dispersion of CSH gel-type early strength agent, convenient for storing, transporting and use.This method uses filter-pressing method, and the alkali content of CSH gel-type early strength agent is greatly reduced, and reduces alkali-aggregate reaction risk that may be present in engineer application, improves the endurance quality of concrete.This method dissolves block-like CSH gels after press filtration using calcium hydroxide solution, and the loss of CSH in follow-up secondary pressure-filtering process can be greatly decreased.This method uses dispersion machine, and CSH gels block-like after press filtration can be well-dispersed in calcium hydroxide solution and water, meets follow-up press filtration and dispersion preparation demand.
Description
Technical field
The invention belongs to technical field of concrete additives concrete admixture, more particularly to a kind of CSH gel-types are early strong
Agent and its purification redisperse preparation method.
Background technology
CSH gel-types early strength agent (hydrated calcium silicate gel type early strength agent) is used as a kind of new and effective early-strength admixture,
The early mechanics characteristics of concrete can not only be substantially improved, moreover it is possible to the form cycling rate in prefabricated components production is effectively promoted,
It has been increasingly being applied among engineering practice.
However in CSH gel-type early strength agent preparation process, but there are following both sides technical barriers：
(1) CSH gel-types early strength agent, which prepares product sodium nitrate, can be significantly increased the alkali content of early strength agent, cause Plant ecology anti-
It answers, influences the endurance quality of concrete.Traditional suction filtration method needs to carry out repeatedly filtering operation, less efficient, and due to CSH
Water is dissolved in, causes to cause a large amount of losses of CSH after filtering for the first time using the method for water dissolution bulk CSH, so as to make CSH gel-types
The active ingredient of early strength agent is greatly reduced；
(2) after CSH gel-types early strength agent prepares molding, apparent lamination occurs in the short time, lower floor is cohesion
The CSH gels of conglomeration, upper strata are remaining sodium nitrate solution, i.e. the product bad dispersibility, are unfavorable for storing, and to early strong effect
Have an adverse effect, the actual demand of engineer application can not be met.
For this purpose, how effectively reduce CSH gel-type early strength agent alkali contents while ensure its active constituent content, realize
The efficient uniform dispersion and storage of the product are the key technical problems for realizing that its engineer application is urgently to be resolved hurrily.
Invention content
Control alkali content can not be taken into account for existing CSH gel-types early strength agent and ensures its active ingredient and bad dispersibility
The problem of.The object of the present invention is to provide a kind of CSH gel-types early strength agent and its purification redisperse preparation methods, effectively reduce
Ensure its active constituent content while CSH gel-type early strength agent alkali contents, and realize the efficient uniform dispersion and storage of the product
It deposits, meets the actual demand of engineer application.
The technical solution adopted by the present invention to solve the technical problems is：
The step of a kind of CSH gel-types early strength agent and its purification redisperse preparation method, this method, is as follows：
Step 1: it is spare to prepare sodium silicate solution, calcium nitrate solution and calcium hydroxide solution；
Step 2: sodium silicate solution prepared by the step 1 is mixed with calcium nitrate solution, reaction generation CSH gels mix
Close liquid I；
Step 3: CSH gels mixed liquor I is placed in filter press, starts filter press, carry out first press filtration, treat that CSH gels mix
It closes liquid I no longer to occur until solution filters out, record filtrate quality m1, take out remaining CSH gels I after press filtration；
Step 4: quality is weighed as m1Calcium hydroxide solution, and mixed with CSH gels I, form CSH gel mixed liquors
Ⅱ；
Step 5: use dispersion machine with certain mixing speed V1 and certain mixing time T1 to CSH gel mixed liquors
II is stirred, and after CSH gels mixed liquor II stirs evenly, is placed in filter press, starts filter press, carry out secondary press filtration, treat
CSH gels mixed liquor II no longer occurs until solution filters out, to record filtrate quality m2, take out remaining CSH gels II after press filtration；
Step 6: quality is weighed as m2Water, and mixed with CSH gels II, form CSH gels mixed liquor III；
Step 7: dispersion machine is used with certain mixing speed V1And certain mixing time T1To CSH gels mixed liquor III
It is stirred, uniformly rear taking-up to be mixed so far, completes CSH gel-type early strength agent lixiviating purification processes；
Step 8: quality is weighed respectively as m3Lauryl sodium sulfate and quality be m4 high-efficiency polycarboxylic acid water reducers, will
After lauryl sodium sulfate is mixed with high-efficiency polycarboxylic acid water reducer, pour among CSH gels mixed liquor III, meanwhile, using dispersion
Machine is with certain mixing speed V2And certain mixing time T2CSH gels mixed liquor III is stirred, it is to be mixed uniformly after take
Go out, CSH gel-type early strength agent is made.
Further, the m1For 75.7g；m2For 76.9g；V1For 600r/min；T1For 3min.
Further, the m3For 4g；m4For 3g；V2For 200r/min；T2For 25s.
Further, the m1For 76.2g；m2For 76.7g；V1For 550r/min；T1For 3.5min.
Further, the m3For 3.6g；m4For 4g；V2For 180r/min；T2For 30s.
The present invention also provides a kind of CSH gel-types early strength agent, by sodium metasilicate, calcium nitrate, calcium hydroxide, dodecyl
Sodium sulphate, high-efficiency polycarboxylic acid water reducer and water, purification, dispersion are prepared.
The beneficial effects of the present invention are：
1. the CSH gel-type early strength agent purification preparation methods of the present invention reduce CSH gel-types morning
Ensure its active constituent content while strong agent alkali content, higher alkali content control is made to allow in standard
In the range of, ensure the early mechanics characteristics and endurance quality of concrete.
2. the CSH gel-type early strength agent redisperse preparation methods of the present invention, efficiently solve CSH
Gel-type early strength agent lamination problem realizes the uniform and stable dispersion and storage of the early strength agent, meets
The actual demand of engineer application.
3. the present invention ensures the stability of CSH gel-type early strength agent performance applications.
4. with strong points, strong operability of the invention, has apparent Social benefit and economic benefit.
Description of the drawings
Fig. 1 is the dispersion effect figure of the CSH gel-type early strength agent without decentralized processing.
Fig. 2 is the dispersion effect figure of CSH gel-types early strength agent provided by the invention.
Fig. 3 purifies embodiment table for CSH gel-types early strength agent provided by the invention.
Specific embodiment
Embodiment 1
It please refers to Fig.3, a kind of CSH gel-types early strength agent of the invention and its purification redisperse preparation method are specific to grasp
It is as follows to make step：
The step of a kind of CSH gel-types early strength agent and its purification redisperse preparation method, this method, is as follows：
Step 1: it is spare to prepare sodium silicate solution, calcium nitrate solution and calcium hydroxide solution；
Step 2: sodium silicate solution prepared by the step 1 is mixed with calcium nitrate solution, reaction generation CSH gels mix
Close liquid I；
Step 3: CSH gels mixed liquor I is placed in filter press, starts filter press, carry out first press filtration, treat that CSH gels mix
It closes liquid I no longer to occur until solution filters out, record filtrate quality m1For 75.7g, remaining CSH gels I after press filtration are taken out；
Step 4: weigh quality m1It for the calcium hydroxide solution of 75.7g, and is mixed with CSH gels I, forms CSH gels and mix
Close liquid II；
Step 5: dispersion machine is used with certain mixing speed V1For 600r/min and certain mixing time T1For 600r/
Min is stirred CSH gels mixed liquor II, after CSH gels mixed liquor II stirs evenly, is placed in filter press, starts press filtration
Machine carries out secondary press filtration, treats that CSH gels mixed liquor II no longer occurs until solution filters out, to record filtrate quality m2For 76.9g,
Remaining CSH gels II after taking-up press filtration；
Step 6: quality is weighed as m2It for the water of 76.9g, and is mixed with CSH gels II, forms CSH gels mixed liquor III；
Step 7: dispersion machine is used with certain mixing speed V1For 600r/min and certain mixing time T1For 3min
CSH gels mixed liquor III is stirred, uniformly rear taking-up to be mixed so far, is completed at CSH gel-type early strength agent lixiviating purifications
Reason；
Step 8: quality is weighed respectively as m3Lauryl sodium sulfate and quality for 4g are m4Subtract for 3g High-efficiency polycarboxylic acids
Aqua after lauryl sodium sulfate is mixed with high-efficiency polycarboxylic acid water reducer, is poured among CSH gels mixed liquor III, meanwhile, it adopts
With dispersion machine with certain mixing speed V2For 200r/min and certain mixing time T2For 25s to CSH gels mixed liquor III into
Row stirring, uniformly rear taking-up to be mixed, is made CSH gel-type early strength agent.
Embodiment 2：
As different from Example 1：m1For 76.2g；m2For 76.7g；V1For 550r/min；T1For 3.5min；m3For 3.6g；
m4For 4g；V2For 180r/min；T2For 30s.Other steps and parameter are same as Example 1.
By to untreated CSH gel-types early strength agent and CSH gel-types early strength agent provided by the invention dispersion effect
Fruit carries out experiment discovery, and the dispersion effect of untreated CSH gel-types early strength agent is as shown in Figure 1.As can be seen from Figure 1：It should
There is apparent lamination in early strength agent, and dispersion is uneven, this is not only bad for storage, transport and uses, and will be to morning
Potent fruit generates will adverse effect.And the multiple CSH mixed with lauryl sodium sulfate and high-efficiency polycarboxylic acid water reducer of the present invention coagulates
The dispersion effect of glue-type early strength agent is as shown in Figure 2.As can be seen from Figure 2：The uniform and stable dispersion of CSH gel-type early strength agent, is convenient for
Storage and construction, can utmostly play its early strong effect.
In conclusion the present invention proposes a kind of CSH gel-types early strength agent and its purification redisperse preparation method.This method
With following advantage：
1) it is mixed by lauryl sodium sulfate and answering for High-efficiency polycarboxylic acid based water reducer, it can be achieved that CSH gel-type early strength agent
Uniform and stable dispersion, convenient for storing, transporting and use, can utmostly play its early strong effect；
2) using filter-pressing method, the alkali content of CSH gel-type early strength agent is greatly reduced, reduce in engineer application there may be
Alkali-aggregate reaction risk, promote the endurance quality of concrete；
3) block-like CSH gels after press filtration are dissolved using calcium hydroxide solution, follow-up secondary press filtration can be greatly decreased
The loss of CSH (i.e. early strength agent active ingredient) in journey；
4) using dispersion machine, CSH gels block-like after press filtration can be well-dispersed in calcium hydroxide solution and water, met
Follow-up press filtration and dispersion preparation demand.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to right.
Claims (6)
1. a kind of CSH gel-types early strength agent and its purification redisperse preparation method, it is characterised in that：The step of this method, is as follows：
Step 1: it is spare to prepare sodium silicate solution, calcium nitrate solution and calcium hydroxide solution；
Step 2: sodium silicate solution prepared by the step 1 is mixed with calcium nitrate solution, reaction generation CSH gel mixed liquors
Ⅰ；
Step 3: CSH gels mixed liquor I is placed in filter press, starts filter press, carry out first press filtration, treat CSH gel mixed liquors
I no longer occurs until solution filters out, to record filtrate quality m1, take out remaining CSH gels I after press filtration；
Step 4: quality is weighed as m1Calcium hydroxide solution, and mixed with CSH gels I, form CSH gels mixed liquor II；
Step 5: dispersion machine is used with certain mixing speed V1And certain mixing time T1CSH gels mixed liquor II is carried out
Stirring after CSH gels mixed liquor II stirs evenly, is placed in filter press, starts filter press, carry out secondary press filtration, treat CSH gels
Mixed liquor II no longer occurs until solution filters out, to record filtrate quality m2, take out remaining CSH gels II after press filtration；
Step 6: quality is weighed as m2Water, and mixed with CSH gels II, form CSH gels mixed liquor III；
Step 7: dispersion machine is used with certain mixing speed V1And certain mixing time T1CSH gels mixed liquor III is carried out
Stirring, uniformly rear taking-up to be mixed, so far, completes CSH gel-type early strength agent lixiviating purification processes；
Step 8: quality is weighed respectively as m3Lauryl sodium sulfate and quality be m4High-efficiency polycarboxylic acid water reducer, by dodecane
After base sodium sulphate is mixed with high-efficiency polycarboxylic acid water reducer, pour among CSH gels mixed liquor III, meanwhile, dispersion machine is used with one
Fixed mixing speed V2And certain mixing time T2CSH gels mixed liquor III is stirred, uniformly rear taking-up to be mixed, system
Obtain CSH gel-type early strength agent.
2. preparation method according to claim 1, it is characterised in that：The m1For 75.7g；m2For 76.9g；V1For 600r/
min；T1For 3min.
3. preparation method according to claim 1, it is characterised in that：The m3For 4g；m4For 3g；V2For 200r/min；T2
For 25s.
4. preparation method according to claim 1, it is characterised in that：The m1For 76.2g；m2For 76.7g；V1For 550r/
min；T1For 3.5min.
5. preparation method according to claim 1, it is characterised in that：The m3For 3.6g；m4For 4g；V2For 180r/min；
T2For 30s.
6. a kind of CSH gel-types early strength agent, it is characterised in that：It is prepared according to claim 1-5 any one of them preparation method
It forms, by sodium metasilicate, calcium nitrate, calcium hydroxide, lauryl sodium sulfate, high-efficiency polycarboxylic acid water reducer and water, purification, dispersion
It is prepared.
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| CN201711474825.7A CN108178547A (en) | 2017-12-29 | 2017-12-29 | A kind of CSH gel-types early strength agent and its purification redisperse preparation method |
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| CN201711474825.7A CN108178547A (en) | 2017-12-29 | 2017-12-29 | A kind of CSH gel-types early strength agent and its purification redisperse preparation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109160762A (en) * | 2018-08-23 | 2019-01-08 | 武汉三源特种建材有限责任公司 | Cement quick-hardening additive and application thereof |
| CN109354432A (en) * | 2018-11-13 | 2019-02-19 | 上海建工集团股份有限公司 | A kind of early-strength water-reducing agent and preparation method and application |
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| CN104402009A (en) * | 2014-10-29 | 2015-03-11 | 上海建工集团股份有限公司 | Calcium silicate hydrate gel solution early strength agent and preparation method thereof |
| CN106542534A (en) * | 2015-09-18 | 2017-03-29 | 中国科学院过程工程研究所 | A kind of method of impurity natrium in de-sodium agent removing afwillite |
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| US20100234491A1 (en) * | 2010-05-27 | 2010-09-16 | Morteza Khorrami | Method and material for manufacturing fiber cement board |
| CN104402009A (en) * | 2014-10-29 | 2015-03-11 | 上海建工集团股份有限公司 | Calcium silicate hydrate gel solution early strength agent and preparation method thereof |
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Cited By (3)
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| CN109160762A (en) * | 2018-08-23 | 2019-01-08 | 武汉三源特种建材有限责任公司 | Cement quick-hardening additive and application thereof |
| CN109160762B (en) * | 2018-08-23 | 2021-04-16 | 武汉三源特种建材有限责任公司 | Cement quick-hardening additive and application thereof |
| CN109354432A (en) * | 2018-11-13 | 2019-02-19 | 上海建工集团股份有限公司 | A kind of early-strength water-reducing agent and preparation method and application |
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Application publication date: 20180619 |