CN105293978A - Concrete strengthening auxiliary - Google Patents
Concrete strengthening auxiliary Download PDFInfo
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- CN105293978A CN105293978A CN201510690010.7A CN201510690010A CN105293978A CN 105293978 A CN105293978 A CN 105293978A CN 201510690010 A CN201510690010 A CN 201510690010A CN 105293978 A CN105293978 A CN 105293978A
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Abstract
The invention discloses a novel concrete strengthening auxiliary. A preparation method of the concrete strengthening auxiliary comprises the steps that polyether macromonomers and sulfonate are added to water, the temperature is increased to 60 DEG C, and sulfonation is conducted for half an hour; an initiating agent is added, an acrylic monomer is dropwise added during stirring, the time of dropping is controlled to range from 0.5 h to 1 h, and after dropping addition is completed, the temperature is kept constant for one hour; the temperature is decreased to 45 DEG C, alkylol amine is dropwise added, the time of dropping is controlled to range from 0.5 h to 1 h, after dropping addition is completed, the temperature is kept constant for one hour, and a finished product is obtained. The mass ratio of the sulfonate to the polyether macromonomers is 1 to 3-3.5, and the mass ratio of the initiating agent to the polyether macromonomers is 1 to 2.5-3. The whole concrete performance is improved, and meanwhile it is found that a specific formula has an extremely significant and unexpected effect of excellently improving the shrinkage resistance performance of concrete.
Description
Technical field
The present invention relates to concrete additive technical field, especially a kind of concrete reinforcing aids.
Background technology
Along with the continuous progress of concrete technology, people expect that concrete has more excellent performance, as high strength, high workability and and high-durability.Except common C10, C30, C40, the concrete appearance of performance as contour in C60, C80 as caused the interest of Chinese scholars and slip-stick artist, and has been applied in nuclear power nuclear island, marine structure, Highrise buildings, viaduct and cut-pff wall engineering.The domestic Study and appliance to high-strength high-performance concrete is started late, but nearly ten years high performance concrete very fast, novel, efficient, the complex function type concrete admixture of investigation and application development continually develop the development also promoting high performance concrete.
Efficient additive is one of indispensable component of modern concrete.From initial stage sixties Japan and since Germany starts application, obtain in countries in the world and developed widely and apply, and become after Steel Concrete, prestressed concrete, the breakthrough of third time of concrete technology.Application high efficiency water reducing agent, except saving cement and the energy, improves speed of application and construction quality, improves outside technique and labor condition, the more important thing is and make concrete obtain unprecedented high-performance.Can say, there is no efficient additive, just there is no high performance concrete.Along with the development of concrete works technology, many new requirements are proposed to concrete performance.As pump concrete requires high mobility; Winter construction requires high early strength; Highrise buildings, ocean structure require high-strength, high-durability.The realization of these performances, needs to apply high performance additive.Because admixture is to the improvement of concrete technical feature, the ratio that it applies in engineering is increasing, and many countries use the concrete mixing admixture to account for 60% ~ 90% of concrete total amount.Therefore, admixture also just becomes the 5th kind of composition in concrete gradually.
Because general admixture exists, volume is comparatively large, water-reducing rate is not high enough, reinforced effects is very not remarkable and the adaptability of cement is wide, concrete slump loss is larger; Especially in process of production to adopt some toxic and harmful substances, exist and be unfavorable for the shortcomings such as Sustainable development, thus partly constrain and further apply.Thus researching and developing performance function composite additive and become the task of top priority, is also current research and development focus both domestic and external.
Compared with naphthalene system, melamine class admixture, the mechanism of action that is new and effective, complex function type concrete admixture is different, and it has comb shaped molecular structure, and with multiple active group on main chain, and polarity is comparatively strong, and side chain is with hydrophilic active group.Main chain is adsorbed in cement particle surface, cement particle and water is separated by electrical charge rejection; Side chain carries out space obstacle to cement particle and water, reaches high water-reducing rate, and increases concrete glutinous poly-property, improves concrete homogeneity.The admixture retention that main chain is longer, side chain is shorter is better; The admixtures water-reducing ratio that main chain is shorter, side chain is longer is higher; By adjusting the length of main chain and side chain during production, meet different workability of concrete, retention and concrete viscosity requirement.Because cement particle surface does not all cover by main chain, therefore unmasked portion can carry out aquation, along with the increase of basicity, destroy electrical charge rejection and space obstacle, cement can aquation rapidly, so the existing longer workability retention of the admixture of this type, do not affect again concrete normal condensation.
Just because of the mechanism of action that it is special, when compared with greatly improving when low-dosage and effectively control concrete workability, concrete plasticizing can keep the time more grown, concrete mixing image liquid-like is soft, concrete force of cohesion strong (do not emanate, disperse or bleeding), can adjust time of coagulation and air content simultaneously as required.Concrete after sclerosis has high-strength, lower shrinkage, low-permeability, has the concrete surface of good anti-carbonization and chemical corrosion and uniformity.
In recent years, flourish along with China's real estate, ready mixed concrete have also been obtained very large development space, and the concrete mixing plant quantity of various places is increasing, this also increases the market competition of ready mixed concrete manufacturing enterprise, specific mass, becomes common recognition in the industry gradually than price.Studying data at home and abroad shows, under the environment of routine, about have the cement of 10% ~ 30% normally can not play effect in concrete, this part can only play the cement of stopping composition effect, is cost waste maximum in concrete application.Concrete reinforcing aids is exactly a kind of novel concrete admixture, its reactivity worth is extremely strong, mix the interface zone that fully can be distributed to aggregate and cement slurry in concrete, there is repeatedly aquation in the Ca (OH) 2 fully exciting SiO2 and Al2O3 and hydrated cementitious to generate, produce CSH gelinite, make CSH gelinite have more several times than normal concrete, thus substantially increase the performances such as concrete intensity, weather resistance.When ensureing concrete over-all properties, volume is 0.6% ~ 1.0% of gelling material, with normal concrete comparison, can reduce cement consumption 12% ~ 20%.
The present invention aims to provide a kind of new concrete reinforcing aids, and this product is environmental protection colourless transparent liquid (tasteless, nontoxic, do not fire).The hard insolubles that this product can react generation can fill the pore blocked in concrete, and the degree of compactness increasing inside concrete improves concrete intensity and wear resistance.The adjustment modification that this product belongs to cement-base concrete strengthens multi-functional admixture kind, by introducing difference in functionality component, make gelling material good distribution in concrete and excite the reactivity of mineralogical composition, reducing hydrated product crystalline mineral quantity, make full use of the response capacity of adulterant; Improve the workability of concrete mortar, regulate optimised coagulation air in soil bubble structure, concrete parcel property obviously improves, anti-bleeding capacity improves, pumping frictional force reduces, can go to glue to partially sticky type cement concrete (as high-grade concrete), also to low-grade concrete thickening, can effectively ensure concrete intensity and weather resistance.
Summary of the invention
Base the object of the invention is to provide a kind of new concrete reinforcing aids.
Technical scheme of the present invention is as follows:
A kind of new concrete reinforcing aids, it is prepared from by following methods:
Polyether macromonomer is added in water, sulfonate, heats up 60 degree, sulfonation half an hour, add initiator, drip Acrylic Acid Monomer while stirring, time for adding controls at 0.5-1 hour, drips constant temperature one hour, be cooled to 45 degree, drip hydramine, time for adding controls at 0.5-1 hour, drips off constant temperature and is a finished product in.
The mass ratio of described sulfonate and polyether macromonomer is 1:3-3.5,
The mass ratio of described initiator and polyether macromonomer is 1:2.5-3;
The key point of this Product Process is:
1, the ratio of sulfonate and polyether macromonomer, the ratio of initiator and polyether macromonomer
2, add the time after initiator, the length of time controling is different, has considerable influence to the performance of product.
3, the time controling in Acrylic Acid Monomer dropping process, has larger impact to the performance of product.
Obtained environmental protection colourless transparent liquid (tasteless, nontoxic, do not fire).
Usefulness of the present invention is:
Product is environmental protection colourless transparent liquid (tasteless, nontoxic, do not fire).The hard insolubles that this product can react generation can fill the pore blocked in concrete, and the degree of compactness increasing inside concrete improves concrete intensity and wear resistance.The adjustment modification that this product belongs to cement-base concrete strengthens multi-functional admixture kind, by introducing difference in functionality component, make gelling material good distribution in concrete and excite the reactivity of mineralogical composition, reducing hydrated product crystalline mineral quantity, make full use of the response capacity of adulterant; Improve the workability of concrete mortar, regulate optimised coagulation air in soil bubble structure, concrete parcel property obviously improves, and anti-bleeding capacity improves, and pumping frictional force reduces, and can go to glue to partially sticky type cement concrete (as high-grade concrete).
Accompanying drawing explanation
Accompanying drawing 1 is process flow sheet of the present invention.
Embodiment
Embodiment 1:
Concrete reinforcing aids, it is prepared from by following methods:
Polyether macromonomer is added in water, sulfonate, heats up 60 degree, sulfonation half an hour, add initiator, drip Acrylic Acid Monomer while stirring, time for adding controls at 0.5 hour, drips constant temperature one hour, be cooled to 45 degree, drip hydramine, time for adding controls at 1 hour, drips off constant temperature and is a finished product in.
The mass ratio of described sulfonate and polyether macromonomer is 1:3,
The mass ratio of described initiator and polyether macromonomer is 1:3.
Obtained environmental protection colourless transparent liquid (tasteless, nontoxic, do not fire).
The hard insolubles that this product can react generation can fill the pore blocked in concrete, and the degree of compactness increasing inside concrete improves concrete intensity and wear resistance.Ultimate compression strength 40% and wear resistance 55%.Concrete impermeability can be improved and reach more than 30%.
Embodiment 2:
Concrete reinforcing aids, it is prepared from by following methods:
Polyether macromonomer is added in water, sulfonate, heats up 60 degree, sulfonation half an hour, add initiator, drip Acrylic Acid Monomer while stirring, time for adding controls at 1 hour, drips constant temperature one hour, be cooled to 45 degree, drip hydramine, time for adding controls at 0.5 hour, drips off constant temperature and is a finished product in.
Obtained environmental protection colourless transparent liquid (tasteless, nontoxic, do not fire).
The mass ratio of described sulfonate and polyether macromonomer is 1:3.5,
The mass ratio of described initiator and polyether macromonomer is 1:2.5.
The hard insolubles that this product can react generation can fill the pore blocked in concrete, and the degree of compactness increasing inside concrete improves concrete intensity and wear resistance.Ultimate compression strength 50% and wear resistance 40%.Concrete impermeability can be improved and reach more than 30%.
Embodiment 3:
Concrete reinforcing aids, it is prepared from by following methods:
Polyether macromonomer is added in water, sulfonate, heats up 60 degree, sulfonation half an hour, add initiator, drip Acrylic Acid Monomer while stirring, time for adding controls at 0.6 hour, drips constant temperature one hour, be cooled to 45 degree, drip hydramine, time for adding controls at 0.9 hour, drips off constant temperature and is a finished product in.
The mass ratio of described sulfonate and polyether macromonomer is 1:3.1,
The mass ratio of described initiator and polyether macromonomer is 1:2.9.
Obtained environmental protection colourless transparent liquid (tasteless, nontoxic, do not fire).
The hard insolubles that this product can react generation can fill the pore blocked in concrete, and the degree of compactness increasing inside concrete improves concrete intensity and wear resistance.Ultimate compression strength 41% and wear resistance 54%.Concrete impermeability can be improved and reach more than 30%.
Embodiment 4:
Concrete reinforcing aids, it is prepared from by following methods:
Polyether macromonomer is added in water, sulfonate, heats up 60 degree, sulfonation half an hour, add initiator, drip Acrylic Acid Monomer while stirring, time for adding controls at 0.9 hour, drips constant temperature one hour, be cooled to 45 degree, drip hydramine, time for adding controls at 0.6 hour, drips off constant temperature and is a finished product in.
The mass ratio of described sulfonate and polyether macromonomer is 1:3.4,
The mass ratio of described initiator and polyether macromonomer is 1:2.6.
Obtained environmental protection colourless transparent liquid (tasteless, nontoxic, do not fire).
The hard insolubles that this product can react generation can fill the pore blocked in concrete, and the degree of compactness increasing inside concrete improves concrete intensity and wear resistance.Ultimate compression strength 49% and wear resistance 41%.Concrete impermeability can be improved and reach more than 30%.
Embodiment 5:
Prepare concrete reinforcing aids:
Polyether macromonomer is added in water, sulfonate, heats up 60 degree, sulfonation half an hour, add initiator, drip Acrylic Acid Monomer while stirring, time for adding controls at 1 hour, drips constant temperature one hour, be cooled to 45 degree, drip hydramine, time for adding controls at 0.5 hour, drips off constant temperature and is a finished product in.
The proportional range of described sulfonate and polyether macromonomer at 1:3.5,
The proportional range of described initiator and polyether macromonomer is at 1:2.5;
Obtained environmental protection colourless transparent liquid (tasteless, nontoxic, do not fire).
The hard insolubles that this product can react generation can fill the pore blocked in concrete, and the degree of compactness increasing inside concrete improves concrete intensity and wear resistance.Ultimate compression strength 42% and wear resistance 53%.Concrete impermeability can be improved and reach more than 30%.
Embodiment 6:
Continuation carries out anti-freezing property test to the concrete reinforcing aids that embodiment 1-5 obtains and shrinkage is tested, according to the concrete that the proportioning of addition content 0.5% is prepared out, after curing age reaches 28 days, after 200 freeze-thaw cycle, the test mass loss rate of concrete test block and relative dynamic elastic modulus, its result is as in table 1.
The present inventor has found the improvement of beyond thought anti-freezing property and shrinkage, and result is as shown in following table 1 and table 2:
Table 1
| Proportioning is numbered | Mass loss rate/% | Relative dynamic elastic modulus/% |
| Embodiment 1 | 1.5 | 76.5 |
| Embodiment 2 | 1.6 | 81.3 |
| Embodiment 3 | 1.3 | 80.3 |
| Embodiment 4 | 1.4 | 81.5 |
| Embodiment 5 | 0.5 | 98.1 |
| Benchmark (blank) | 1.5 | 78.1 |
Table 2
Visible, concrete reinforcing aids of the present invention overallly can also improve concrete anti-freezing property and shrinkage.
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (4)
1. a new concrete reinforcing aids, it is prepared from by following methods:
Polyether macromonomer is added in water, sulfonate, heats up 60 degree, sulfonation half an hour, add initiator, drip Acrylic Acid Monomer while stirring, time for adding controls at 0.5-1 hour, drips constant temperature one hour, be cooled to 45 degree, drip hydramine, time for adding controls at 0.5-1 hour, drips off constant temperature and is a finished product in.
2. the mass ratio of sulfonate described in and polyether macromonomer is 1:3-3.5,
The mass ratio of described initiator and polyether macromonomer is 1:2.5-3.
3. concrete reinforcing aids according to claim 1, is characterized in that:
The proportional range of described sulfonate and polyether macromonomer at 1:3,
The proportional range of described initiator and polyether macromonomer is at 1:3.
4. concrete reinforcing aids according to claim 2, is characterized in that: it mixes after in concrete according to 0.5% mass ratio, the shrinkage value * 10 of cement
-630 days/the length of time was 108.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510690010.7A CN105293978B (en) | 2015-10-22 | 2015-10-22 | A kind of concrete reinforcing aids |
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| CN201510690010.7A CN105293978B (en) | 2015-10-22 | 2015-10-22 | A kind of concrete reinforcing aids |
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| CN105293978A true CN105293978A (en) | 2016-02-03 |
| CN105293978B CN105293978B (en) | 2018-02-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110104985A (en) * | 2019-05-24 | 2019-08-09 | 山西桑穆斯建材化工有限公司 | A kind of wear-resisting water-reducing agent of HF type concrete impact-resistant |
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| CN101735411A (en) * | 2010-01-08 | 2010-06-16 | 北京工业大学 | Method for preparing sustained-release polycarboxylic water reducer |
| CN102391435A (en) * | 2011-10-09 | 2012-03-28 | 浙江五龙化工股份有限公司 | Slump-retaining polycarboxylic acid type water reducing agent and preparation method thereof |
| CN102796234A (en) * | 2012-08-15 | 2012-11-28 | 聊城天成水泥科技研发有限公司 | Preparation method of high efficiency controllable polycarboxylic acids series cement grinding aid |
| CN102815882A (en) * | 2012-08-03 | 2012-12-12 | 山西科腾环保科技有限公司 | High-performance water reducer of polycarboxylic acid, and preparation method thereof |
| CN103772624A (en) * | 2014-01-10 | 2014-05-07 | 陕西科技大学 | Early-strength polycarboxylate concrete water-reducing agent and preparation method thereof |
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2015
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101735411A (en) * | 2010-01-08 | 2010-06-16 | 北京工业大学 | Method for preparing sustained-release polycarboxylic water reducer |
| CN102391435A (en) * | 2011-10-09 | 2012-03-28 | 浙江五龙化工股份有限公司 | Slump-retaining polycarboxylic acid type water reducing agent and preparation method thereof |
| CN102815882A (en) * | 2012-08-03 | 2012-12-12 | 山西科腾环保科技有限公司 | High-performance water reducer of polycarboxylic acid, and preparation method thereof |
| CN102796234A (en) * | 2012-08-15 | 2012-11-28 | 聊城天成水泥科技研发有限公司 | Preparation method of high efficiency controllable polycarboxylic acids series cement grinding aid |
| CN103772624A (en) * | 2014-01-10 | 2014-05-07 | 陕西科技大学 | Early-strength polycarboxylate concrete water-reducing agent and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110104985A (en) * | 2019-05-24 | 2019-08-09 | 山西桑穆斯建材化工有限公司 | A kind of wear-resisting water-reducing agent of HF type concrete impact-resistant |
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| CN105293978B (en) | 2018-02-27 |
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Address after: 313000 Zhejiang city of Huzhou province Daixi shangqiang Industrial Park Patentee after: Huzhou Green Building Materials Development Co., Ltd. Address before: 313000 Guanbian Village, Dixi Town, Wuxing District, Huzhou City, Zhejiang Province Patentee before: HUZHOU GREEN BUILDING MATERIALS DEVELOPMENT CO., LTD. |
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Denomination of invention: A kind of concrete reinforcing agent Effective date of registration: 20210113 Granted publication date: 20180227 Pledgee: Daixi sub branch of Huzhou Wuxing Rural Commercial Bank Co.,Ltd. Pledgor: HUZHOU NEW GREEN MATERIAL Co.,Ltd. Registration number: Y2021330000035 |
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