CN106749955A - A kind of anti-chamotte mould polycarboxylate water-reducer - Google Patents
A kind of anti-chamotte mould polycarboxylate water-reducer Download PDFInfo
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- CN106749955A CN106749955A CN201510821179.1A CN201510821179A CN106749955A CN 106749955 A CN106749955 A CN 106749955A CN 201510821179 A CN201510821179 A CN 201510821179A CN 106749955 A CN106749955 A CN 106749955A
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- water
- reducer
- chamotte mould
- polycarboxylate water
- mould polycarboxylate
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Abstract
The invention provides a kind of anti-chamotte mould polycarboxylate water-reducer, it is related to technical field of concrete additives, the weight proportion of its component is：Polyethylene glycol dimethacrylate 7.5%, acrylic acid 3.5%, acryloyl ammonium 16%, neopelex 4%, ammonium persulfate 6%, NaOH 3.5%, sodium gluconate 8%, isopropanol 5%, balance of water.In the case of aggregate clay content 8%, its water-reducing rate may remain in 30% or so to the anti-chamotte mould polycarboxylate water-reducer, it is ensured that the compression strength of concrete.
Description
Technical field
The present invention relates to technical field of concrete additives, more particularly to a kind of anti-chamotte mould polycarboxylate water-reducer.
Background technology
Compared with the water reducers such as naphthalene system, aliphatic, sulfonated melamine, the advantage of poly carboxylic acid series water reducer shows：Slump retaining is good；Under identical flowing implementations, smaller is influenceed on cement setting time, the problems such as diminishing, bleed, slow setting, bleeding can be efficiently solved；Cement can be replaced with more slags or flyash, so that cost reduction；The harmful substances such as formaldehyde, naphthalene are not used, environment will not be polluted etc.；Simultaneously compared with other water reducers, clay content requirement of the polycarboxylate water-reducer to aggregate is higher, because the suction-operated of clay causes the water-reducing rate of polycarboxylate dehydragent to decline.During concrete-agitating, polycarboxylate dehydragent part by clay adsorption, adsorbed water reducer loses the function of its diminishing, so that the water-reducing rate reduction of polycarboxylate dehydragent, as the adsorbed water reducer of the increase of clay content also increases, therefore as the increase water-reducing rate of clay content of gathering materials also just is decreased, effect variation of collapsing is protected.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of anti-chamotte mould polycarboxylate water-reducer, even if clay content is higher in aggregate, the water reducer can still keep water-reducing rate higher.
In order to solve the above-mentioned technical problem, the present invention is adopted the following technical scheme that：A kind of anti-chamotte mould polycarboxylate water-reducer, the weight proportion of its component is：Polyethylene glycol dimethacrylate 7.5%, acrylic acid 3.5%, acryloyl ammonium 16%, neopelex 4%, ammonium persulfate 6%, NaOH 3.5%, sodium gluconate 8%, isopropanol 5%, balance of water.
In the present invention, the method for preparing above-mentioned anti-chamotte mould polycarboxylate water-reducer is comprised the following steps：
The first step, each component is ready to according to above-mentioned weight proportion, and is contained in cell therefor, a part of water taken from the container of dress water and is added in reactor and the water in reactor is heated to 70-75 DEG C, then while stirring, while toward adding polyethylene glycol dimethacrylate in reactor；
Second step, after polyethylene glycol dimethacrylate is uniformly mixed, again toward sequentially adding neopelex, acrylic acid, acryloyl ammonium in reactor, after stirring half an hour, another side stirring is while toward adding ammonium persulfate in reactor, the ammonium persulfate is divided into three additions, each half an hour interval time；
Solution, is hereafter heated to 105-110 DEG C, insulation 1.5 hours at 20 minutes each interval times by the 3rd step, lasting stirring and toward adding isopropanol, the isopropanol to be divided into and add twice in reactor；
3rd step, room temperature is cooled to by solution, is subsequently adding sodium gluconate, NaOH and remaining water, is persistently stirred 20 minutes, you can obtain foregoing anti-chamotte mould polycarboxylate water-reducer；
Above steps is to carry out at ambient pressure.
The present invention obtain beneficial effect be：In the case of aggregate clay content 8%, its water-reducing rate may remain in 30% or so to the anti-chamotte mould polycarboxylate water-reducer that the present invention is provided, it is ensured that the compression strength of concrete.
Specific embodiment
As one embodiment of the present invention, a kind of anti-chamotte mould polycarboxylate water-reducer, the weight proportion of its component is：Polyethylene glycol dimethacrylate 7.5%, acrylic acid 3.5%, acryloyl ammonium 16%, neopelex 4%, ammonium persulfate 6%, NaOH 3.5%, sodium gluconate 8%, isopropanol 5%, balance of water.
The method for preparing above-mentioned anti-chamotte mould polycarboxylate water-reducer is comprised the following steps：
The first step, each component is ready to according to above-mentioned weight proportion, and is contained in cell therefor, a part of water taken from the container of dress water and is added in reactor and the water in reactor is heated to 70-75 DEG C, then while stirring, while toward adding polyethylene glycol dimethacrylate in reactor；
Second step, after polyethylene glycol dimethacrylate is uniformly mixed, again toward sequentially adding neopelex, acrylic acid, acryloyl ammonium in reactor, after stirring half an hour, another side stirring is while toward adding ammonium persulfate in reactor, the ammonium persulfate is divided into three additions, each half an hour interval time；
Solution, is hereafter heated to 105-110 DEG C, insulation 1.5 hours at 20 minutes each interval times by the 3rd step, lasting stirring and toward adding isopropanol, the isopropanol to be divided into and add twice in reactor；
3rd step, room temperature is cooled to by solution, is subsequently adding sodium gluconate, NaOH and remaining water, is persistently stirred 20 minutes, you can obtain foregoing anti-chamotte mould polycarboxylate water-reducer；
Above steps is to carry out at ambient pressure.
Anti- chamotte mould polycarboxylate water-reducer is prepared according to said ratio and preparation method, hereafter, the anti-chamotte mould polycarboxylate water-reducer that will be obtained is carried out the test of water-reducing rate, concrete crushing strength by following concrete mix, and test result is as described below.
Concrete each component weight proportion：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, the weight portion of clay 19.
In water-reducing rate, loss of slump, the test of concrete crushing strength, the adding proportion of anti-chamotte mould polycarboxylate water-reducer is 0.65%（Weight ratio）.
Water-reducing rate test result is：After the anti-chamotte mould polycarboxylate water-reducer of addition aforementioned proportion, water-reducing rate is 29.5%.Can be seen that the anti-chamotte mould polycarboxylate water-reducer by above-mentioned test result still has preferable water-reducing effect in the case where concrete clay content is higher, to saving cement and ensureing that concrete strength will be significant.
Concrete crushing strength experiment is with reference to GB8076-2008《Concrete admixture》, experiment concrete match ratio ratio of mud W/C=0.29,20 DEG C of experimental temperature.Concrete crushing strength test result is：In the case of the anti-chamotte mould polycarboxylate water-reducer of addition aforementioned proportion, concrete 3d intensity is 34.2 MPas, 40.6 MPas of 7d intensity, 58.8 MPas of 28d intensity.It is possible thereby to determine, the anti-chamotte mould polycarboxylate water-reducer reaches in concrete clay content and can still ensure in the case of 8% concrete with compression strength higher.
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 anti-chamotte mould polycarboxylate water-reducer, the weight proportion of its component is：Polyethylene glycol dimethacrylate 7.5%, acrylic acid 3.5%, acryloyl ammonium 16%, neopelex 4%, ammonium persulfate 6%, NaOH 3.5%, sodium gluconate 8%, isopropanol 5%, balance of water.
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| CN201510821179.1A CN106749955A (en) | 2015-11-20 | 2015-11-20 | A kind of anti-chamotte mould polycarboxylate water-reducer |
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| CN201510821179.1A CN106749955A (en) | 2015-11-20 | 2015-11-20 | A kind of anti-chamotte mould polycarboxylate water-reducer |
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| CN106749955A true CN106749955A (en) | 2017-05-31 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107459599A (en) * | 2017-09-07 | 2017-12-12 | 上海高铁化学建材有限公司 | A kind of anti-chamotte mould polycarboxylate water-reducer and preparation method thereof |
| CN113860796A (en) * | 2021-10-29 | 2021-12-31 | 北京金隅节能保温科技(大厂)有限公司 | Ecological porous cellucotton and preparation process thereof |
| WO2023213064A1 (en) * | 2022-05-06 | 2023-11-09 | 苏州市兴邦化学建材有限公司 | Anti-flocculation polycarboxylate superplasticizer and preparation method therefor |
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| CN103897116A (en) * | 2014-02-28 | 2014-07-02 | 北京东方雨虹防水技术股份有限公司 | Mud-resistant polycarboxylic acid water reducer and preparation method thereof |
| CN103923276A (en) * | 2014-04-28 | 2014-07-16 | 中海油能源发展股份有限公司惠州石化分公司 | Method for synthesizing polyether-type polycarboxylate water reducer |
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| CN103897116A (en) * | 2014-02-28 | 2014-07-02 | 北京东方雨虹防水技术股份有限公司 | Mud-resistant polycarboxylic acid water reducer and preparation method thereof |
| CN103923276A (en) * | 2014-04-28 | 2014-07-16 | 中海油能源发展股份有限公司惠州石化分公司 | Method for synthesizing polyether-type polycarboxylate water reducer |
| CN104031218A (en) * | 2014-05-20 | 2014-09-10 | 日照港集团岚山港务有限公司 | Long-chain polycarboxylic acid water reducing agent |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107459599A (en) * | 2017-09-07 | 2017-12-12 | 上海高铁化学建材有限公司 | A kind of anti-chamotte mould polycarboxylate water-reducer and preparation method thereof |
| CN113860796A (en) * | 2021-10-29 | 2021-12-31 | 北京金隅节能保温科技(大厂)有限公司 | Ecological porous cellucotton and preparation process thereof |
| WO2023213064A1 (en) * | 2022-05-06 | 2023-11-09 | 苏州市兴邦化学建材有限公司 | Anti-flocculation polycarboxylate superplasticizer and preparation method therefor |
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