CN106749954A - It is a kind of to prepare the method that polycarboxylic acids protects agent of collapsing - Google Patents
It is a kind of to prepare the method that polycarboxylic acids protects agent of collapsing Download PDFInfo
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- CN106749954A CN106749954A CN201510808215.0A CN201510808215A CN106749954A CN 106749954 A CN106749954 A CN 106749954A CN 201510808215 A CN201510808215 A CN 201510808215A CN 106749954 A CN106749954 A CN 106749954A
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- China
- Prior art keywords
- water
- collapsing
- polycarboxylic acids
- concrete
- agent
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- 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.)
- Pending
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- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 34
- 239000002253 acid Substances 0.000 title claims abstract description 29
- 150000007513 acids Chemical class 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229940051841 polyoxyethylene ether Drugs 0.000 claims abstract description 10
- 229920000056 polyoxyethylene ether Polymers 0.000 claims abstract description 10
- 125000001844 prenyl group Chemical group [H]C([*])([H])C([H])=C(C([H])([H])[H])C([H])([H])[H] 0.000 claims abstract description 10
- QZPSOSOOLFHYRR-UHFFFAOYSA-N 3-hydroxypropyl prop-2-enoate Chemical compound OCCCOC(=O)C=C QZPSOSOOLFHYRR-UHFFFAOYSA-N 0.000 claims abstract description 7
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 7
- JPAOMENBKRZQDR-UHFFFAOYSA-N CC=CC.[Na] Chemical compound CC=CC.[Na] JPAOMENBKRZQDR-UHFFFAOYSA-N 0.000 claims abstract description 7
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims abstract description 7
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 abstract description 22
- 229920005646 polycarboxylate Polymers 0.000 abstract description 17
- 150000001875 compounds Chemical class 0.000 abstract description 9
- 239000000654 additive Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 9
- 239000004568 cement Substances 0.000 description 5
- 230000000996 additive effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000002079 cooperative effect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003223 protective agent Substances 0.000 description 1
- 229920013730 reactive polymer Polymers 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000013268 sustained release Methods 0.000 description 1
- 239000012730 sustained-release form Substances 0.000 description 1
Classifications
-
- 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
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
- C08F283/065—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals on to unsaturated polyethers, polyoxymethylenes or polyacetals
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/16—Sulfur-containing compounds
- C04B24/161—Macromolecular compounds comprising sulfonate or sulfate groups
- C04B24/163—Macromolecular compounds comprising sulfonate or sulfate groups obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/165—Macromolecular compounds comprising sulfonate or sulfate groups obtained by reactions only involving carbon-to-carbon unsaturated bonds containing polyether side chains
-
- 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
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/308—Slump-loss preventing agents
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The method that polycarboxylic acids protects agent of collapsing is prepared the invention provides a kind of, is related to technical field of concrete additives, the weight proportion of its component is：Prenyl polyoxyethylene ether 7%, maleic anhydride 5.5%, acryloyl ammonium 16%, hydroxypropyl acrylate 4.5%, methylpropene sodium sulfonate 8.5%, NaOH 3.7%, balance of water.The polycarboxylic acids protects agent of collapsing and overcomes the excessive too fast shortcoming of existing polycarboxylate water-reducer loss of slump with polycarboxylate water-reducer compound use, guarantor's effect of collapsing is obvious, simultaneously, it can keep the mobility of fresh concrete, be that the use of concrete creates favourable condition, in addition, the polycarboxylic acids protects collapse agent and polycarboxylate water-reducer compound use, due to the raising of water-reducing rate, the intensity of concrete increased, and also overcome the low shortcoming of early age strength of concrete.
Description
Technical field
It is more particularly to a kind of to prepare the method that polycarboxylic acids protects agent of collapsing the present invention relates to technical field of concrete additives.
Background technology
Guarantor's agent of collapsing is the additive that can keep slump not immediate loss, and guarantor's agent of collapsing mainly rises and delays hydrated cementitious to condense, and reaches the effect for keeping slump.
Most common problem is that the too fast of loss of slump mainly has 5 kinds for reducing the method for polycarboxylate water-reducer loss of slump at present in cement adaptability：（1）Compound slow setting component；（2）The repeated multiple times addition of water reducer；（3）Additive process after water reducer；（4）Sustained release method；（5）Compounding reactive polymer copolymer.
In too fast this problem for loss of slump, additive worker generally improves the guarantor of water reducer and collapses ability with polycarboxylate water-reducer and retarder compounding.It is particularly problematic particularly when transportation range is more long but above-mentioned way far can not meet requirement of engineering.It is weak that the addition of retarder can not fundamentally solve the problems, such as that existing polycarboxylate water-reducer protects ability of collapsing, excessive incorporation retarder can extend on the contrary the setting time of concrete, reduce concrete quality, influence construction speed is then, exploitation one kind can keep slump not lose in a long time, and not influence the guarantor of maturing later stage performance to collapse agent just into the study hotspot of concrete admixture.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of polycarboxylic acids for preparing and protects the method for agent of collapsing, and the polycarboxylic acids prepared using the method protects agent of collapsing can keep slump not lose in a long time, and does not influence the guarantor of maturing later stage performance to collapse agent.
In order to solve the above-mentioned technical problem, the present invention is adopted the following technical scheme that：It is a kind of to prepare the method that polycarboxylic acids protects agent of collapsing, comprise the following steps：
The first step, according to prenyl polyoxyethylene ether 7%, maleic anhydride 5.5%, acryloyl ammonium 16%, hydroxypropyl acrylate 4.5%, methylpropene sodium sulfonate 8.5%, NaOH 3.7%, be ready to for each component by the weight proportion of balance of water, and each component is contained in container, a part of water is taken from the container of dress water to add in reactor and the water in reactor is heated into 46-50 DEG C, then while stirring, while toward adding prenyl polyoxyethylene ether in reactor；
Second step, after prenyl polyoxyethylene ether is completely dissolved, then toward maleic anhydride, acryloyl ammonium, hydroxypropyl acrylate, methylpropene sodium sulfonate is sequentially added in reactor, continuously stirs 4-4.5 hours；
3rd step, adds NaOH and remaining water, solution pH value is transferred into 7-7.5 can obtain the polycarboxylic acids and protect agent of collapsing；
Above steps is to carry out at ambient pressure.
The present invention obtain beneficial effect be：The polycarboxylic acids that the method provided by the present invention is prepared protects agent of collapsing and overcomes the excessive too fast shortcoming of existing polycarboxylate water-reducer loss of slump with polycarboxylate water-reducer compound use, guarantor's effect of collapsing is obvious, simultaneously, it can keep the mobility of fresh concrete, be that the use of concrete creates favourable condition, in addition, the polycarboxylic acids protects collapse agent and polycarboxylate water-reducer compound use, due to the raising of water-reducing rate, the intensity of concrete increased, and also overcome the low shortcoming of early age strength of concrete.
Specific embodiment
It is a kind of to prepare the method that polycarboxylic acids protects agent of collapsing as one embodiment of the present invention, comprise the following steps：
The first step, according to prenyl polyoxyethylene ether 7%, maleic anhydride 5.5%, acryloyl ammonium 16%, hydroxypropyl acrylate 4.5%, methylpropene sodium sulfonate 8.5%, NaOH 3.7%, be ready to for each component by the weight proportion of balance of water, and each component is contained in container, a part of water is taken from the container of dress water to add in reactor and the water in reactor is heated into 46-50 DEG C, then while stirring, while toward adding prenyl polyoxyethylene ether in reactor；
Second step, after prenyl polyoxyethylene ether is completely dissolved, then toward maleic anhydride, acryloyl ammonium, hydroxypropyl acrylate, methylpropene sodium sulfonate is sequentially added in reactor, continuously stirs 4-4.5 hours；
3rd step, adds NaOH and remaining water, solution pH value is transferred into 7-7.5 can obtain the polycarboxylic acids and protect agent of collapsing；
Above steps is to carry out at ambient pressure.
Polycarboxylic acids being prepared according to the method described above and protecting agent of collapsing, hereafter, agent of collapsing is protected with the polycarboxylic acids for obtaining carries out paste flowing degree test, and paste flowing degree test is with reference to GB/T8077-2000《Concrete admixture homogeneity test method》In flowing degree of net paste of cement method of testing carry out, finally measure and filled guarantor and collapse after agent, flowing degree of net paste of cement is lost 4.5% or so with the extension of time, illustrate that guarantor's agent of collapsing is highly beneficial to reduction fluidity loss.
Then the polycarboxylic acids that will be obtained protects agent of collapsing and the test of water-reducing rate, loss of slump, concrete crushing strength is carried out 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.
In water-reducing rate, loss of slump, the test of concrete crushing strength, the adding proportion of polycarboxylate water-reducer is 0.9%（Weight ratio）, the adding proportion that polycarboxylic acids protects agent of collapsing is 0.25%（Weight ratio）.
Water-reducing rate test result is：In the case of the polycarboxylate water-reducer of simple addition 0.9%, water-reducing rate is 28%, and in the case where the polycarboxylic acids of simple addition 0.25% protects agent of collapsing, water-reducing rate is 17%, and after compound addition polycarboxylate water-reducer and polycarboxylic acids protect agent of collapsing, water-reducing rate is 39%.Can be seen that guarantor agent of collapsing by above-mentioned test result has certain water-reducing effect, after it is compound with polycarboxylate water-reducer, with cooperative effect, the water-reduction of water reducer is substantially increased, the raising of this water-reducing rate will be significant to saving cement and raising concrete strength.
Loss of slump test result is：In the case of the polycarboxylate water-reducer of simple addition 0.9%, initial slump degree is 240 millimeters, it is 220 millimeters after 60 minutes, it is 200 millimeters after 90 minutes, after compound addition polycarboxylate water-reducer and polycarboxylic acids protect agent of collapsing, initial slump degree is 270 millimeters, is 260 millimeters after 60 minutes, is 250 millimeters after 90 minutes.It can thus be seen that be not added with the polycarboxylic acids protect collapse agent when, slump loss it is larger, just have lost within 60 minutes 20 millimeters, after 90 minutes be even more loss reach 40 millimeters；After addition polycarboxylic acids protects agent of collapsing, slump loss is smaller, and 20 millimeters are only have lost after 90 minutes, it was demonstrated that the polycarboxylic acids protects agent of collapsing and overcomes the excessive too fast shortcoming of existing polycarboxylate water-reducer loss of slump, protects effect of collapsing obvious.
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：In the case of the polycarboxylate water-reducer of simple addition 0.9%, concrete 3d intensity is 36.5 MPas, 42.3 MPas of 7d intensity, 60.5 MPas of 28d intensity, after compound addition polycarboxylic acids protects agent of collapsing, concrete 3d intensity is 39.7 MPas, 49.4 MPas of 7d intensity, 65.2 MPas of 28d intensity.It is possible thereby to determine, the polycarboxylic acids is protected agent of collapsing and is used with polycarboxylic acids water reducing agent compositional, and because water-reducing rate is improved, the intensity of concrete increased, while overcoming the low shortcoming of early age strength of concrete.
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. it is a kind of to prepare the method that polycarboxylic acids protects agent of collapsing, comprise the following steps：
The first step, according to prenyl polyoxyethylene ether 7%, maleic anhydride 5.5%, acryloyl ammonium 16%, hydroxypropyl acrylate 4.5%, methylpropene sodium sulfonate 8.5%, NaOH 3.7%, be ready to for each component by the weight proportion of balance of water, and each component is contained in container, a part of water is taken from the container of dress water to add in reactor and the water in reactor is heated into 46-50 DEG C, then while stirring, while toward adding prenyl polyoxyethylene ether in reactor；
Second step, after prenyl polyoxyethylene ether is completely dissolved, then toward maleic anhydride, acryloyl ammonium, hydroxypropyl acrylate, methylpropene sodium sulfonate is sequentially added in reactor, continuously stirs 4-4.5 hours；
3rd step, adds NaOH and remaining water, solution pH value is transferred into 7-7.5 can obtain the polycarboxylic acids and protect agent of collapsing；
Above steps is to carry out at ambient pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510808215.0A CN106749954A (en) | 2015-11-20 | 2015-11-20 | It is a kind of to prepare the method that polycarboxylic acids protects agent of collapsing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510808215.0A CN106749954A (en) | 2015-11-20 | 2015-11-20 | It is a kind of to prepare the method that polycarboxylic acids protects agent of collapsing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106749954A true CN106749954A (en) | 2017-05-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510808215.0A Pending CN106749954A (en) | 2015-11-20 | 2015-11-20 | It is a kind of to prepare the method that polycarboxylic acids protects agent of collapsing |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101993210A (en) * | 2010-03-04 | 2011-03-30 | 山西大学 | Prenyl polyether polycarboxylate water reducing agent and synthesis method thereof |
| CN102504126A (en) * | 2011-11-03 | 2012-06-20 | 山西合盛邦砼建材有限公司 | Slump loss resistant type gather carboxylate water-reducing agent and preparation method thereof |
| CN103755208A (en) * | 2013-12-19 | 2014-04-30 | 柳州正菱集团有限公司 | Concrete slump retaining agent |
| CN104230203A (en) * | 2014-09-11 | 2014-12-24 | 北京东方雨虹防水技术股份有限公司 | Super controlled release type polycarboxylate slump retention agent and preparation method thereof |
-
2015
- 2015-11-20 CN CN201510808215.0A patent/CN106749954A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101993210A (en) * | 2010-03-04 | 2011-03-30 | 山西大学 | Prenyl polyether polycarboxylate water reducing agent and synthesis method thereof |
| CN102504126A (en) * | 2011-11-03 | 2012-06-20 | 山西合盛邦砼建材有限公司 | Slump loss resistant type gather carboxylate water-reducing agent and preparation method thereof |
| CN103755208A (en) * | 2013-12-19 | 2014-04-30 | 柳州正菱集团有限公司 | Concrete slump retaining agent |
| CN104230203A (en) * | 2014-09-11 | 2014-12-24 | 北京东方雨虹防水技术股份有限公司 | Super controlled release type polycarboxylate slump retention agent and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 陈国新等: "聚羧酸系保坍剂的低温制备及性能", 《新型建筑材料》 * |
| 陈惠等: "一种新型聚羧酸保坍剂的研究与应用", 《山西大学学报(自然科学版)》 * |
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Application publication date: 20170531 |
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