CN106746853A - The method for preparing high-strength concrete underwater casting anti-dispersant - Google Patents
The method for preparing high-strength concrete underwater casting anti-dispersant Download PDFInfo
- Publication number
- CN106746853A CN106746853A CN201510808232.4A CN201510808232A CN106746853A CN 106746853 A CN106746853 A CN 106746853A CN 201510808232 A CN201510808232 A CN 201510808232A CN 106746853 A CN106746853 A CN 106746853A
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- CN
- China
- Prior art keywords
- water
- reactor
- dispersant
- polyacrylamide
- hydroxypropyl acrylate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/10—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of amides or imides
-
- 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)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
Abstract
The invention provides a kind of method for preparing high-strength concrete underwater casting anti-dispersant, comprise the following steps：The first step, according to polyacrylamide 23%, hydroxypropyl acrylate 4.5%, methylpropene sodium sulfonate 8.5%, ammonium persulfate 3%, calcium acetate 12%, lithium carbonate 11%, lithium chloride 4%, triethanolamine 0.15%, be ready to for each component by the weight proportion of balance of water, a part of water is taken to add in reactor and be heated to 40-45 DEG C, then while stirring, successively adds polyacrylamide and hydroxypropyl acrylate on one side；Second step, after polyacrylamide and hydroxypropyl acrylate are completely dissolved, sequentially adds methylpropene sodium sulfonate, ammonium persulfate and triethanolamine, continuously stirs 1.5-2 hours；3rd step, room temperature is cooled to by solution, sequentially adds calcium acetate, lithium carbonate, lithium chloride and remaining water, is finally continuously stirred 2 hours；Above steps is to carry out at ambient pressure.
Description
Technical field
The present invention relates to technical field of concrete additives, more particularly to a kind of method for preparing high-strength concrete underwater casting anti-dispersant.
Background technology
Building underwater concrete building（Such as coagulated seabank underwater etc.）When, in order to solve the problems, such as that underwater concrete loses in water reclaimed water mudflow, water absorption, increase concrete crushing strength when improving the viscosity of cement slurry and reducing concrete underwater casting, it usually needs anti-dispersant is added in concrete.
At present, on the market anti-dispersant species is more, and it has problems with mostly in actual application：1st, early strength is low（During for C60 grades of concrete, its 1d compression strength is mostly at 20 MPas）.2nd, early strength growth rate is slow（During for C60 grades of concrete, its 7d compression strength is mostly at 38 MPas）.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of method for preparing high-strength concrete underwater casting anti-dispersant, and the anti-dispersant prepared by the method can improve the early strength and early stage gain in strength speed during concrete underwater casting.
In order to solve the above-mentioned technical problem, the present invention is adopted the following technical scheme that：A kind of method for preparing high-strength concrete underwater casting anti-dispersant, comprises the following steps：
The first step, according to polyacrylamide 23%, hydroxypropyl acrylate 4.5%, methylpropene sodium sulfonate 8.5%, ammonium persulfate 3%, calcium acetate 12%, lithium carbonate 11%, lithium chloride 4%, triethanolamine 0.15%, be ready to for each component by the weight proportion of balance of water, and be contained in cell therefor, a part of water is taken from the container of dress water to add in reactor and the water in reactor is heated into 40-45 DEG C, then while stirring, while toward successively adding polyacrylamide and hydroxypropyl acrylate in reactor；
Second step, after polyacrylamide and hydroxypropyl acrylate are completely dissolved, then toward methylpropene sodium sulfonate, ammonium persulfate and triethanolamine is sequentially added in reactor, continuously stirs 1.5-2 hours；
3rd step, room temperature is cooled to by solution, then toward calcium acetate, lithium carbonate, lithium chloride and remaining water is sequentially added in reactor, is finally continuously stirred 2 hours, you can obtain above-mentioned high-strength concrete underwater casting anti-dispersant；
Above steps is to carry out at ambient pressure.
The present invention obtain beneficial effect be：The high-strength concrete underwater casting anti-dispersant that the method provided by the present invention is prepared can greatly improve early strength during concrete underwater casting（Increase rate about 27%）, also can significantly accelerate early age strength of concrete growth rate.
Specific embodiment
Used as one embodiment of the present invention, a kind of method for preparing high-strength concrete underwater casting anti-dispersant is comprised the following steps：
The first step, according to polyacrylamide 23%, hydroxypropyl acrylate 4.5%, methylpropene sodium sulfonate 8.5%, ammonium persulfate 3%, calcium acetate 12%, lithium carbonate 11%, lithium chloride 4%, triethanolamine 0.15%, be ready to for each component by the weight proportion of balance of water, and be contained in cell therefor, a part of water is taken from the container of dress water to add in reactor and the water in reactor is heated into 40-45 DEG C, then while stirring, while toward successively adding polyacrylamide and hydroxypropyl acrylate in reactor；
Second step, after polyacrylamide and hydroxypropyl acrylate are completely dissolved, then toward methylpropene sodium sulfonate, ammonium persulfate and triethanolamine is sequentially added in reactor, continuously stirs 1.5-2 hours；
3rd step, room temperature is cooled to by solution, then toward calcium acetate, lithium carbonate, lithium chloride and remaining water is sequentially added in reactor, is finally continuously stirred 2 hours, you can obtain above-mentioned high-strength concrete underwater casting anti-dispersant；
Above steps is to carry out at ambient pressure.
High-strength concrete underwater casting anti-dispersant is prepared according to method, hereafter, the high-strength concrete underwater casting anti-dispersant that will be obtained is applied in the meter per second of water velocity 1.5, water pour the consolidation stabilization works of 2 meters of height fall, test the early strength of concrete, the situation that record concrete strength increases over time.
The concrete each component weight proportion used in experiment is：The weight portion of cement 32, the weight portion of river sand 73, the weight portion of handstone 33 of 0.3-0.8 centimetres of diameter, the weight portion of middle stone 44 of 1-1.5 centimetres of diameter, the weight portion of big stone 33 of 1.8-2.4 centimetres of diameter.
Concrete crushing strength experiment is with reference to GB8076-2008《Concrete admixture》, experiment concrete matched ratio of mud W/C=0.29,20 DEG C of experimental temperature.Concrete crushing strength test result is：Concrete 1d intensity is 25.5 MPas, 38.9 MPas of 3d intensity, 49.3 MPas of 7d intensity, 65.8 MPas of 28d intensity.
Be can be seen that from above-mentioned test data, by adding above-mentioned high-strength concrete underwater casting anti-dispersant, early strength during concrete underwater casting improves about 27%, the concrete 3d intensity that with the addition of anti-dispersant has just exceeded the level of prior art 7d, it is possible thereby to determine, by adding above-mentioned anti-dispersant, early age strength of concrete growth rate has obtained significantly accelerating.
Above-described embodiment is the present invention preferably implementation, and in addition, the present invention can be realized with other manner, and any obvious replacement is within protection scope of the present invention on the premise of the technical program design is not departed from.
Finally, it should be emphasized that, in order to allow those of ordinary skill in the art more easily to understand improvements of the present invention relative to prior art, some descriptions of the invention have been simplified, and for the sake of clarity, present specification is omitted some other elements, and those of ordinary skill in the art should be aware that these elements for omitting also may make up present disclosure.
Claims (1)
1. the method for preparing high-strength concrete underwater casting anti-dispersant, comprises the following steps：
The first step, according to polyacrylamide 23%, hydroxypropyl acrylate 4.5%, methylpropene sodium sulfonate 8.5%, ammonium persulfate 3%, calcium acetate 12%, lithium carbonate 11%, lithium chloride 4%, triethanolamine 0.15%, be ready to for each component by the weight proportion of balance of water, and be contained in cell therefor, a part of water is taken from the container of dress water to add in reactor and the water in reactor is heated into 40-45 DEG C, then while stirring, while toward successively adding polyacrylamide and hydroxypropyl acrylate in reactor；
Second step, after polyacrylamide and hydroxypropyl acrylate are completely dissolved, then toward methylpropene sodium sulfonate, ammonium persulfate and triethanolamine is sequentially added in reactor, continuously stirs 1.5-2 hours；
3rd step, room temperature is cooled to by solution, then toward calcium acetate, lithium carbonate, lithium chloride and remaining water is sequentially added in reactor, is finally continuously stirred 2 hours, you can obtain above-mentioned high-strength concrete underwater casting anti-dispersant；
Above steps is to carry out at ambient pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510808232.4A CN106746853A (en) | 2015-11-20 | 2015-11-20 | The method for preparing high-strength concrete underwater casting anti-dispersant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510808232.4A CN106746853A (en) | 2015-11-20 | 2015-11-20 | The method for preparing high-strength concrete underwater casting anti-dispersant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106746853A true CN106746853A (en) | 2017-05-31 |
Family
ID=58885054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510808232.4A Pending CN106746853A (en) | 2015-11-20 | 2015-11-20 | The method for preparing high-strength concrete underwater casting anti-dispersant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106746853A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019169645A1 (en) * | 2018-03-05 | 2019-09-12 | 沙焕焕 | Non-dispersible soil-cement for underwater reinforcement, and construction method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1083452A (en) * | 1993-09-18 | 1994-03-09 | 中国科学院水利部能源部水利水电科学研究院 | Underwater concrete is dispersion agent and concrete mix method thereof not |
| CN1454865A (en) * | 2003-05-15 | 2003-11-12 | 同济大学 | Underwater antidispersion concrete admixture for building |
| CN101074154A (en) * | 2006-05-18 | 2007-11-21 | 中国石油天然气集团公司 | Anti-dispersant of concrete for coagulated seabank underwater |
| CN101333091A (en) * | 2007-06-25 | 2008-12-31 | 深圳市海川实业股份有限公司 | Method for preparing high-efficiency water-reducing agent of poly-carboxylic acid |
-
2015
- 2015-11-20 CN CN201510808232.4A patent/CN106746853A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1083452A (en) * | 1993-09-18 | 1994-03-09 | 中国科学院水利部能源部水利水电科学研究院 | Underwater concrete is dispersion agent and concrete mix method thereof not |
| CN1454865A (en) * | 2003-05-15 | 2003-11-12 | 同济大学 | Underwater antidispersion concrete admixture for building |
| CN101074154A (en) * | 2006-05-18 | 2007-11-21 | 中国石油天然气集团公司 | Anti-dispersant of concrete for coagulated seabank underwater |
| CN101333091A (en) * | 2007-06-25 | 2008-12-31 | 深圳市海川实业股份有限公司 | Method for preparing high-efficiency water-reducing agent of poly-carboxylic acid |
Non-Patent Citations (1)
| Title |
|---|
| 刘娟: "水下不分散混凝土抗分散剂的研究", 《中国优秀博硕士学位论文全文数据库（硕士）工程科技II辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019169645A1 (en) * | 2018-03-05 | 2019-09-12 | 沙焕焕 | Non-dispersible soil-cement for underwater reinforcement, and construction method |
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Application publication date: 20170531 |
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