CN106746862A - A kind of method for preparing agent on crack resistance of concrete dispersant - Google Patents
A kind of method for preparing agent on crack resistance of concrete dispersant Download PDFInfo
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- CN106746862A CN106746862A CN201510808234.3A CN201510808234A CN106746862A CN 106746862 A CN106746862 A CN 106746862A CN 201510808234 A CN201510808234 A CN 201510808234A CN 106746862 A CN106746862 A CN 106746862A
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Abstract
The invention provides a kind of method for preparing agent on crack resistance of concrete dispersant, it is comprised the following steps：The first step, by polyacrylamide 26%, prenyl polyoxyethylene ether 3.5%, maleic anhydride 2%, ammonium persulfate 7%, calcium acetate 10%, lithium carbonate 13%, lithium chloride 7%, NaOH 1.5%, 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 by it to 58-62 DEG C, then while stirring, while toward adding prenyl polyoxyethylene ether in reactor；Second step, after prenyl polyoxyethylene ether is completely dissolved, solution is cooled to 40-45 DEG C and sequentially adds maleic anhydride, polyacrylamide and ammonium persulfate, continuously stir 3.5 hours；3rd step, adds NaOH and a part of water, and solution pH value is transferred into 8；4th step, 25-30 DEG C is cooled to by solution, sequentially adds calcium acetate, lithium carbonate, lithium chloride and remaining water, is finally continuously stirred 1 hour；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 agent on crack resistance of concrete 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 C50 grades of concrete, its 1d compression strength is mostly at 14-18 MPas）.2nd, early strength growth rate is slow（During for C50 grades of concrete, its 7d compression strength is mostly at 30-34 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 agent on crack resistance of concrete dispersant, the agent on crack resistance of concrete dispersant of early strength and early stage gain in strength speed when the agent on crack resistance of concrete dispersant prepared by the method can improve 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 agent on crack resistance of concrete dispersant, comprises the following steps：
The first step, by polyacrylamide 26%, prenyl polyoxyethylene ether 3.5%, maleic anhydride 2%, ammonium persulfate 7%, calcium acetate 10%, lithium carbonate 13%, lithium chloride 7%, NaOH 1.5%, be ready to for each component by the weight proportion of balance of water, and be contained in container each component respectively, a part of water is taken from the container of dress water to add in reactor and the water in reactor is heated into 58-62 DEG C, then while stirring, while toward adding prenyl polyoxyethylene ether in reactor；
Second step, after prenyl polyoxyethylene ether is completely dissolved, 40-45 DEG C is cooled to again toward maleic anhydride, polyacrylamide and ammonium persulfate is sequentially added in reactor by solution, is continuously stirred 3.5 hours；
3rd step, adds NaOH and a part of water, and solution pH value is transferred into 8；
4th step, 25-30 DEG C 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 1 hour, you can obtain above-mentioned agent on crack resistance of concrete dispersant；
Above steps is to carry out at ambient pressure.
The present invention obtain beneficial effect be：The agent on crack resistance of concrete dispersant that the method provided using the present invention is prepared can greatly improve early strength during concrete underwater casting（Increase rate about 23%）, 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 agent on crack resistance of concrete dispersant is comprised the following steps：
The first step, by polyacrylamide 26%, prenyl polyoxyethylene ether 3.5%, maleic anhydride 2%, ammonium persulfate 7%, calcium acetate 10%, lithium carbonate 13%, lithium chloride 7%, NaOH 1.5%, be ready to for each component by the weight proportion of balance of water, and be contained in container each component respectively, a part of water is taken from the container of dress water to add in reactor and the water in reactor is heated into 58-62 DEG C, then while stirring, while toward adding prenyl polyoxyethylene ether in reactor；
Second step, after prenyl polyoxyethylene ether is completely dissolved, 40-45 DEG C is cooled to again toward maleic anhydride, polyacrylamide and ammonium persulfate is sequentially added in reactor by solution, is continuously stirred 3.5 hours；
3rd step, adds NaOH and a part of water, and solution pH value is transferred into 8；
4th step, 25-30 DEG C 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 1 hour, you can obtain above-mentioned agent on crack resistance of concrete dispersant；
Above steps is to carry out at ambient pressure.
Agent on crack resistance of concrete dispersant is prepared according to preparation method, hereafter, the agent on crack resistance of concrete application of dispersant that will be obtained pours the consolidation stabilization works of 2 meters of height fall in the meter per second of water velocity 1.5, water, tests 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 21.5 MPas, 35.7 MPas of 3d intensity, 46.4 MPas of 7d intensity, 62.3 MPas of 28d intensity.
Be can be seen that from above-mentioned test data, agent on crack resistance of concrete dispersant prepared by the method provided by adding the present invention, early strength during concrete underwater casting improves about 23%, 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. a kind of method for preparing agent on crack resistance of concrete dispersant, comprises the following steps：
The first step, by polyacrylamide 26%, prenyl polyoxyethylene ether 3.5%, maleic anhydride 2%, ammonium persulfate 7%, calcium acetate 10%, lithium carbonate 13%, lithium chloride 7%, NaOH 1.5%, be ready to for each component by the weight proportion of balance of water, and be contained in container each component respectively, a part of water is taken from the container of dress water to add in reactor and the water in reactor is heated into 58-62 DEG C, then while stirring, while toward adding prenyl polyoxyethylene ether in reactor；
Second step, after prenyl polyoxyethylene ether is completely dissolved, 40-45 DEG C is cooled to by solution, then toward maleic anhydride, polyacrylamide and ammonium persulfate is sequentially added in reactor, is continuously stirred 3.5 hours；
3rd step, adds NaOH and a part of water, and solution pH value is transferred into 8；
4th step, 25-30 DEG C 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 1 hour, you can obtain above-mentioned agent on crack resistance of concrete dispersant；
Above steps is to carry out at ambient pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510808234.3A CN106746862A (en) | 2015-11-20 | 2015-11-20 | A kind of method for preparing agent on crack resistance of concrete dispersant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510808234.3A CN106746862A (en) | 2015-11-20 | 2015-11-20 | A kind of method for preparing agent on crack resistance of concrete dispersant |
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| CN106746862A true CN106746862A (en) | 2017-05-31 |
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| CN201510808234.3A Pending CN106746862A (en) | 2015-11-20 | 2015-11-20 | A kind of method for preparing agent on crack resistance of concrete dispersant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112552454A (en) * | 2020-11-09 | 2021-03-26 | 中交二航武汉港湾新材料有限公司 | Preparation method of anti-dispersing agent for underwater non-dispersed concrete |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101519288A (en) * | 2009-04-03 | 2009-09-02 | 南京瑞迪高新技术公司 | Special additive for underwater undispersed shrinking-free grouting material |
| CN102153313A (en) * | 2011-04-21 | 2011-08-17 | 江苏锋泰建材科技有限公司 | Concrete complex additive |
| JP2014037329A (en) * | 2012-08-15 | 2014-02-27 | Denki Kagaku Kogyo Kk | Underwater non-separable concrete |
| CN104446115A (en) * | 2014-11-18 | 2015-03-25 | 桂林华越环保科技有限公司 | Concrete synergist |
-
2015
- 2015-11-20 CN CN201510808234.3A patent/CN106746862A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101519288A (en) * | 2009-04-03 | 2009-09-02 | 南京瑞迪高新技术公司 | Special additive for underwater undispersed shrinking-free grouting material |
| CN102153313A (en) * | 2011-04-21 | 2011-08-17 | 江苏锋泰建材科技有限公司 | Concrete complex additive |
| JP2014037329A (en) * | 2012-08-15 | 2014-02-27 | Denki Kagaku Kogyo Kk | Underwater non-separable concrete |
| CN104446115A (en) * | 2014-11-18 | 2015-03-25 | 桂林华越环保科技有限公司 | Concrete synergist |
Non-Patent Citations (1)
| Title |
|---|
| 刘春燕: "保坍型聚羧酸减水剂的合成及性能研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112552454A (en) * | 2020-11-09 | 2021-03-26 | 中交二航武汉港湾新材料有限公司 | Preparation method of anti-dispersing agent for underwater non-dispersed concrete |
| CN112552454B (en) * | 2020-11-09 | 2023-04-18 | 中交二航武汉港湾新材料有限公司 | Preparation method of anti-dispersing agent for underwater non-dispersed concrete |
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Application publication date: 20170531 |