CN105254205A - Concrete slump remaining agent and preparation method thereof - Google Patents
Concrete slump remaining agent and preparation method thereof Download PDFInfo
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- CN105254205A CN105254205A CN201510637363.0A CN201510637363A CN105254205A CN 105254205 A CN105254205 A CN 105254205A CN 201510637363 A CN201510637363 A CN 201510637363A CN 105254205 A CN105254205 A CN 105254205A
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Abstract
The invention discloses a concrete slump remaining agent and a preparation method thereof. The concrete slump remaining agent is prepared from, by mass, 1-5 parts of methyl cellulose, 5-10 parts of polyacrylamide, 2-5 parts of calcium formate, 1.0-2.8 parts of saccharose, 5-10 parts of maleic anhydride, 0.2-1.0 part of methyl alcohol polyoxyethylene ether, 10-18 parts of monoethanolamine, 3-8 parts of formic acid, 0.5-1.2 parts of phosphoric acid, 6-11 parts of sodium methallyl sulfonate, 5.2-8.8 parts of methacrylic acid, 1.0-2.5 parts of sodium gluconate, and 10-15 parts of water. The slump remaining effect of the slump remaining agent is obvious, when the mass of the slum remaining agent doped in cement is 0.05%-0.08% of the mass of the cement, no slump loss is caused within 60 min, the maximum slump loss is only 10.8% in the ninetieth minute, flowablity of green concrete can be kept, and favorable conditions are created for use of commercial concrete.
Description
Technical field
The invention belongs to technical field of concrete additives, be specifically related to a kind of concrete slump retaining agent and preparation method thereof.
Background technology
Flourish along with commerical ready-mixed concrete industry for building, the concrete admixture of China was widely used in recent years, and wherein the consumption such as Cai system sulfonate and formaldehyde condenses analog high efficiency water reducing agent, condensate of melamine sulfonate and formaldehyde analog high efficiency water reducing agent, ligno-sulfate based plasticizer, sugared calcium water reducer is more.These water reducers give the good mobility of fresh concrete and intensity, for Site, substantially can meet construction needs.But for commerical ready-mixed concrete, ubiquity the excessive problem of slump-loss.
The method of current solution concrete slump loss has a lot, common are following several: (1) adds retardant in construction, thus reduces the hydration rate at cement initial stage, helps to solve slump-loss.(2) adopt multiaddition method, the method can improve concrete workability within the scope of certain.(3) adopt latter admixing method, after mixing concrete is good, add high efficiency water reducing agent again through the regular hour.(4) high-performance slump retaining agent and polycarboxylate water-reducer compound use is selected.But using method one solves concrete slump loss, can affect the time of coagulation of cement, this just affects construction speed to a certain extent, and this is disadvantageous in engineering construction.Using method two and method three solve concrete slump loss, though do not have too much influence to the time of coagulation of cement, but the volume of water reducer is difficult to control, and the super of water reducer can be caused unavoidably to mix, thus affect construction quality.And method four fundamental rules can not bring negative impact to aspects such as concrete time of coagulation and strength developments, and the excellent storage stability of slump retaining agent, concrete glutinous poly-property, anti-segregation ability and density can be improved to a certain extent.Therefore study a kind of new and effective slump retaining agent and there is considerable realistic meaning.
Summary of the invention
The object of this invention is to provide a kind of concrete slump retaining agent and preparation method thereof, this slump retaining agent is added in concrete construction, the excessive too fast shortcoming of high efficiency water reducing agent slump-loss can be overcome, guarantor is collapsed successful, it can keep the mobility of fresh concrete, and the use for commerical ready-mixed concrete creates favourable condition.
To achieve these goals, the technical solution used in the present invention is:
A kind of concrete slump retaining agent, the mass fraction of component and each component is as follows: methylcellulose gum 1 ~ 5 part, polyacrylamide 5 ~ 10 parts, calcium formiate 2 ~ 5 parts, sucrose 1.0 ~ 2.8 parts, maleic anhydride 5 ~ 10 parts, methyl alcohol Soxylat A 25-7 0.2 ~ 1.0 part, Monoethanolamine MEA BASF 10 ~ 18 parts, 3 ~ 8 parts, formic acid, phosphoric acid 0.5 ~ 1.2 part, methylpropene sodium sulfonate 6 ~ 11 parts, methacrylic acid 5.2 ~ 8.8 parts, Sunmorl N 60S 1.0 ~ 2.5 parts, 10 ~ 15 parts, water.
Described concrete slump retaining agent, the mass fraction of component and each component is preferably as follows: methylcellulose gum 2 ~ 4 parts, polyacrylamide 6 ~ 8 parts, calcium formiate 2.5 ~ 4.5 parts, sucrose 1.4 ~ 2.2 parts, maleic anhydride 6 ~ 8 parts, methyl alcohol Soxylat A 25-7 0.4 ~ 0.8 part, Monoethanolamine MEA BASF 12 ~ 16 parts, 4 ~ 6 parts, formic acid, phosphoric acid 0.7 ~ 1.0 part, methylpropene sodium sulfonate 7 ~ 10 parts, methacrylic acid 6.1 ~ 7.8 parts, Sunmorl N 60S 1.4 ~ 2.0 parts, 12 ~ 14 parts, water.
Described concrete slump retaining agent, the mass fraction of component and each component is preferably as follows: methylcellulose gum 2.8 parts, polyacrylamide 6.4 parts, calcium formiate 3.1 parts, sucrose 1.7 parts, maleic anhydride 6.5 parts, methyl alcohol Soxylat A 25-7 0.6 part, Monoethanolamine MEA BASF 13 parts, 4.4 parts, formic acid, phosphoric acid 0.8 part, methylpropene sodium sulfonate 8 parts, methacrylic acid 6.6 parts, Sunmorl N 60S 1.7 parts, 13 parts, water.
Described concrete slump retaining agent, the mass fraction of component and each component is preferably as follows: methylcellulose gum 3.7 parts, polyacrylamide 7.4 parts, calcium formiate 4.1 parts, sucrose 2.0 parts, maleic anhydride 7.5 parts, methyl alcohol Soxylat A 25-7 0.7 part, Monoethanolamine MEA BASF 14 parts, 5.6 parts, formic acid, phosphoric acid 0.9 part, methylpropene sodium sulfonate 9 parts, methacrylic acid 7.2 parts, Sunmorl N 60S 1.5 parts, 13 parts, water.
The preparation method of described concrete slump retaining agent, comprises the steps:
1) Monoethanolamine MEA BASF and formic acid, phosphoric acid are carried out after neutralization and maleic anhydride adds in reactor, under nitrogen protection, be warming up to 60 ~ 80 DEG C, add methylcellulose gum and continue to be warming up to 90 DEG C ~ 100 DEG C, isothermal reaction 2 ~ 3h, product A of lowering the temperature to obtain;
2) methyl alcohol Soxylat A 25-7, polyacrylamide and methacrylic acid are joined in reactor, stir, be heated to 100 ~ 120 DEG C, reaction 2 ~ 3h, product B of lowering the temperature to obtain;
3) join in reactor by methylpropene sodium sulfonate, product A and water, stir, add product B in whipping process, product B adds complete, continues stirring 20 ~ 40min, obtains mixture C;
4) calcium formiate, sucrose and Sunmorl N 60S are mixed, add mixture C, stirring and evenly mixing, obtain concrete slump retaining agent.
Step 1) in be preferably warming up to 70 DEG C, add methylcellulose gum and continue to be warming up to 95 DEG C, isothermal reaction 2.5h.
Step 2) in be preferably heated to 110 DEG C, reaction 2.5h.
Step 3) in mixing speed be preferably 800rpm ~ 1200rpm.
Beneficial effect:
Concrete slump retaining agent provided by the invention can overcome the excessive too fast shortcoming of high efficiency water reducing agent slump-loss, guarantor is collapsed successful, volume is 0.05 ~ 0.08% of cement quality time, slump free of losses in 60min, during 90min, slump-loss is maximum is also only 10.8%, it can keep the mobility of fresh concrete, and the use for commerical ready-mixed concrete creates favourable condition.
Embodiment
Testing cement used in following examples is the Tiger Mountain .024.5 cement that Zhejiang Tiger Mountain group produces.The mass concentration of phosphoric acid is 90%.
Embodiment 1
A kind of concrete slump retaining agent, the mass fraction of component and each component is as follows: methylcellulose gum 1 part, polyacrylamide 5 parts, calcium formiate 2 parts, sucrose 1.0 parts, maleic anhydride 5 parts, methyl alcohol Soxylat A 25-7 0.2 part, Monoethanolamine MEA BASF 10 parts, 3 parts, formic acid, phosphoric acid 0.5 part, methylpropene sodium sulfonate 6 parts, methacrylic acid 5.2 parts, Sunmorl N 60S 1.0 parts, 10 parts, water.
Preparation method, comprises the steps:
1) Monoethanolamine MEA BASF and formic acid, phosphoric acid are carried out after neutralization and maleic anhydride adds in reactor, under nitrogen protection, be warming up to 70 DEG C, add methylcellulose gum and continue to be warming up to 95 DEG C, isothermal reaction 2.5h, product A of lowering the temperature to obtain;
2) methyl alcohol Soxylat A 25-7, polyacrylamide and methacrylic acid are joined in reactor, stir, be heated to 110 DEG C, reaction 2.5h, product B of lowering the temperature to obtain;
3) join in reactor by methylpropene sodium sulfonate, product A and water, stir, add product B in whipping process, product B adds complete, and continue to stir 30min, mixing speed is 1000rpm, obtains mixture C;
4) calcium formiate, sucrose and Sunmorl N 60S are mixed, add mixture C, stirring and evenly mixing, mixing speed is 600rpm, obtains concrete slump retaining agent.
Embodiment 2
A kind of concrete slump retaining agent, the mass fraction of component and each component is as follows: methylcellulose gum 5 parts, polyacrylamide 10 parts, calcium formiate 5 parts, sucrose 2.8 parts, maleic anhydride 10 parts, methyl alcohol Soxylat A 25-7 1.0 parts, Monoethanolamine MEA BASF 18 parts, 8 parts, formic acid, phosphatase 11 .2 part, methylpropene sodium sulfonate 11 parts, methacrylic acid 8.8 parts, Sunmorl N 60S 2.5 parts, 15 parts, water.
Preparation method, comprises the steps:
1) Monoethanolamine MEA BASF and formic acid, phosphoric acid are carried out after neutralization and maleic anhydride adds in reactor, under nitrogen protection, be warming up to 70 DEG C, add methylcellulose gum and continue to be warming up to 95 DEG C, isothermal reaction 2.5h, product A of lowering the temperature to obtain;
2) methyl alcohol Soxylat A 25-7, polyacrylamide and methacrylic acid are joined in reactor, stir, be heated to 110 DEG C, reaction 2.5h, product B of lowering the temperature to obtain;
3) join in reactor by methylpropene sodium sulfonate, product A and water, stir, add product B in whipping process, product B adds complete, and continue to stir 30min, mixing speed is 1000rpm, obtains mixture C;
4) calcium formiate, sucrose and Sunmorl N 60S are mixed, add mixture C, stirring and evenly mixing, mixing speed is 600rpm, obtains concrete slump retaining agent.
Embodiment 3
A kind of concrete slump retaining agent, the mass fraction of component and each component is preferably as follows: methylcellulose gum 4 parts, polyacrylamide 8 parts, calcium formiate 4.5 parts, sucrose 2.2 parts, maleic anhydride 8 parts, methyl alcohol Soxylat A 25-7 0.8 part, Monoethanolamine MEA BASF 16 parts, 6 parts, formic acid, phosphatase 11 .0 part, methylpropene sodium sulfonate 10 parts, methacrylic acid 7.8 parts, Sunmorl N 60S 2.0 parts, 14 parts, water.
Preparation method, comprises the steps:
1) Monoethanolamine MEA BASF and formic acid, phosphoric acid are carried out after neutralization and maleic anhydride adds in reactor, under nitrogen protection, be warming up to 70 DEG C, add methylcellulose gum and continue to be warming up to 95 DEG C, isothermal reaction 2.5h, product A of lowering the temperature to obtain;
2) methyl alcohol Soxylat A 25-7, polyacrylamide and methacrylic acid are joined in reactor, stir, be heated to 110 DEG C, reaction 2.5h, product B of lowering the temperature to obtain;
3) join in reactor by methylpropene sodium sulfonate, product A and water, stir, add product B in whipping process, product B adds complete, and continue to stir 30min, mixing speed is 1000rpm, obtains mixture C;
4) calcium formiate, sucrose and Sunmorl N 60S are mixed, add mixture C, stirring and evenly mixing, mixing speed is 600rpm, obtains concrete slump retaining agent.
Embodiment 4
A kind of concrete slump retaining agent, the mass fraction of component and each component is preferably as follows: methylcellulose gum 2 parts, polyacrylamide 6 parts, calcium formiate 2.5 parts, sucrose 1.4 parts, maleic anhydride 6 parts, methyl alcohol Soxylat A 25-7 0.48 part, Monoethanolamine MEA BASF 12 parts, 4 parts, formic acid, phosphoric acid 0.7 part, methylpropene sodium sulfonate 7 parts, methacrylic acid 6.1 parts, Sunmorl N 60S 1.4 parts, 12 parts, water.
Preparation method, comprises the steps:
1) Monoethanolamine MEA BASF and formic acid, phosphoric acid are carried out after neutralization and maleic anhydride adds in reactor, under nitrogen protection, be warming up to 70 DEG C, add methylcellulose gum and continue to be warming up to 95 DEG C, isothermal reaction 2.5h, product A of lowering the temperature to obtain;
2) methyl alcohol Soxylat A 25-7, polyacrylamide and methacrylic acid are joined in reactor, stir, be heated to 110 DEG C, reaction 2.5h, product B of lowering the temperature to obtain;
3) join in reactor by methylpropene sodium sulfonate, product A and water, stir, add product B in whipping process, product B adds complete, and continue to stir 30min, mixing speed is 1000rpm, obtains mixture C;
4) calcium formiate, sucrose and Sunmorl N 60S are mixed, add mixture C, stirring and evenly mixing, mixing speed is 600rpm, obtains concrete slump retaining agent.
Embodiment 5
A kind of concrete slump retaining agent, the mass fraction of component and each component is as follows: methylcellulose gum 2.8 parts, polyacrylamide 6.4 parts, calcium formiate 3.1 parts, sucrose 1.7 parts, maleic anhydride 6.5 parts, methyl alcohol Soxylat A 25-7 0.6 part, Monoethanolamine MEA BASF 13 parts, 4.4 parts, formic acid, phosphoric acid 0.8 part, methylpropene sodium sulfonate 8 parts, methacrylic acid 6.6 parts, Sunmorl N 60S 1.7 parts, 13 parts, water.
Preparation method, comprises the steps:
1) Monoethanolamine MEA BASF and formic acid, phosphoric acid are carried out after neutralization and maleic anhydride adds in reactor, under nitrogen protection, be warming up to 70 DEG C, add methylcellulose gum and continue to be warming up to 95 DEG C, isothermal reaction 2.5h, product A of lowering the temperature to obtain;
2) methyl alcohol Soxylat A 25-7, polyacrylamide and methacrylic acid are joined in reactor, stir, be heated to 110 DEG C, reaction 2.5h, product B of lowering the temperature to obtain;
3) join in reactor by methylpropene sodium sulfonate, product A and water, stir, add product B in whipping process, product B adds complete, and continue to stir 30min, mixing speed is 1000rpm, obtains mixture C;
4) calcium formiate, sucrose and Sunmorl N 60S are mixed, add mixture C, stirring and evenly mixing, mixing speed is 600rpm, obtains concrete slump retaining agent.
Embodiment 6
A kind of concrete slump retaining agent, the mass fraction of component and each component is preferably as follows: methylcellulose gum 3.7 parts, polyacrylamide 7.4 parts, calcium formiate 4.1 parts, sucrose 2.0 parts, maleic anhydride 7.5 parts, methyl alcohol Soxylat A 25-7 0.7 part, Monoethanolamine MEA BASF 14 parts, 5.6 parts, formic acid, phosphoric acid 0.9 part, methylpropene sodium sulfonate 9 parts, methacrylic acid 7.2 parts, Sunmorl N 60S 1.5 parts, 13 parts, water.
Preparation method, comprises the steps:
1) Monoethanolamine MEA BASF and formic acid, phosphoric acid are carried out after neutralization and maleic anhydride adds in reactor, under nitrogen protection, be warming up to 70 DEG C, add methylcellulose gum and continue to be warming up to 95 DEG C, isothermal reaction 2.5h, product A of lowering the temperature to obtain;
2) methyl alcohol Soxylat A 25-7, polyacrylamide and methacrylic acid are joined in reactor, stir, be heated to 110 DEG C, reaction 2.5h, product B of lowering the temperature to obtain;
3) join in reactor by methylpropene sodium sulfonate, product A and water, stir, add product B in whipping process, product B adds complete, and continue to stir 30min, mixing speed is 1000rpm, obtains mixture C;
4) calcium formiate, sucrose and Sunmorl N 60S are mixed, add mixture C, stirring and evenly mixing, mixing speed is 600rpm, obtains concrete slump retaining agent.
Comparative example 1
Comparative example 1 is only with the difference of embodiment 5, does not add calcium formiate, sucrose and Sunmorl N 60S in comparative example 1, all the other components and content thereof with embodiment 5, preparation method and delete step 4).
Comparative example 2
Comparative example 2 is only with the difference of embodiment 5, and do not add methylcellulose gum in comparative example 2, all the other components and content thereof, with embodiment 5, delete this component in preparation method.
The slump retaining agent of embodiment 1 ~ 6 and comparative example 1 ~ 2 is mixed by 0.06% volume and concrete, investigates slump-loss, the results are shown in Table 1.
Table 1:
| Group | Slump-loss in 60min | Slump-loss during 90min |
| Blank | 11.9% | 35.2% |
| Embodiment 1 | 0.05% | 10.2% |
| Embodiment 2 | 0.07% | 10.8% |
| Embodiment 3 | 0.02% | 9.6% |
| Embodiment 4 | 0.02% | 9.1% |
| Embodiment 5 | 0 | 7.5% |
| Embodiment 6 | 0 | 6.9% |
| Comparative example 1 | 6.5% | 24.5% |
| Comparative example 2 | 4.7% | 19.7% |
Can find out according to the result in table 1, calcium formiate is not added in comparative example 1, sucrose and Sunmorl N 60S, it is poor that it protects effect of collapsing, only slightly good than blank group result, and in comparative example 2, add calcium formiate, sucrose and Sunmorl N 60S, its protect collapse effect comparatively comparative example 1 improve a lot, for adding methylcellulose gum in comparative example 2, methylcellulose gum has certain latent, bleed, to the concrete water-retentivity of improvement, reduce bleeding, improve concrete slump retentivity to have a significant effect, can find out according to embodiment and comparative example result, each component combines by the present invention in proportion, there is collaborative raising effect, protect the slump retaining agent that the successful that collapses is better than existing level.
Claims (8)
1. a concrete slump retaining agent, is characterized in that, the mass fraction of component and each component is as follows: methylcellulose gum 1 ~ 5 part, polyacrylamide 5 ~ 10 parts, calcium formiate 2 ~ 5 parts, sucrose 1.0 ~ 2.8 parts, maleic anhydride 5 ~ 10 parts, methyl alcohol Soxylat A 25-7 0.2 ~ 1.0 part, Monoethanolamine MEA BASF 10 ~ 18 parts, 3 ~ 8 parts, formic acid, phosphoric acid 0.5 ~ 1.2 part, methylpropene sodium sulfonate 6 ~ 11 parts, methacrylic acid 5.2 ~ 8.8 parts, Sunmorl N 60S 1.0 ~ 2.5 parts, 10 ~ 15 parts, water.
2. concrete slump retaining agent according to claim 1, is characterized in that, the mass fraction of component and each component is as follows: methylcellulose gum 2 ~ 4 parts, polyacrylamide 6 ~ 8 parts, calcium formiate 2.5 ~ 4.5 parts, sucrose 1.4 ~ 2.2 parts, maleic anhydride 6 ~ 8 parts, methyl alcohol Soxylat A 25-7 0.4 ~ 0.8 part, Monoethanolamine MEA BASF 12 ~ 16 parts, 4 ~ 6 parts, formic acid, phosphoric acid 0.7 ~ 1.0 part, methylpropene sodium sulfonate 7 ~ 10 parts, methacrylic acid 6.1 ~ 7.8 parts, Sunmorl N 60S 1.4 ~ 2.0 parts, 12 ~ 14 parts, water.
3. concrete slump retaining agent according to claim 1, is characterized in that, the mass fraction of component and each component is as follows: methylcellulose gum 2.8 parts, polyacrylamide 6.4 parts, calcium formiate 3.1 parts, sucrose 1.7 parts, maleic anhydride 6.5 parts, methyl alcohol Soxylat A 25-7 0.6 part, Monoethanolamine MEA BASF 13 parts, 4.4 parts, formic acid, phosphoric acid 0.8 part, methylpropene sodium sulfonate 8 parts, methacrylic acid 6.6 parts, Sunmorl N 60S 1.7 parts, 13 parts, water.
4. concrete slump retaining agent according to claim 1, is characterized in that, the mass fraction of component and each component is as follows: methylcellulose gum 3.7 parts, polyacrylamide 7.4 parts, calcium formiate 4.1 parts, sucrose 2.0 parts, maleic anhydride 7.5 parts, methyl alcohol Soxylat A 25-7 0.7 part, Monoethanolamine MEA BASF 14 parts, 5.6 parts, formic acid, phosphoric acid 0.9 part, methylpropene sodium sulfonate 9 parts, methacrylic acid 7.2 parts, Sunmorl N 60S 1.5 parts, 13 parts, water.
5. the preparation method of concrete slump retaining agent described in any one in Claims 1 to 4, is characterized in that, comprise the steps:
1) Monoethanolamine MEA BASF and formic acid, phosphoric acid are carried out after neutralization and maleic anhydride adds in reactor, under nitrogen protection, be warming up to 60 ~ 80 DEG C, add methylcellulose gum and continue to be warming up to 90 DEG C ~ 100 DEG C, isothermal reaction 2 ~ 3h, product A of lowering the temperature to obtain;
2) methyl alcohol Soxylat A 25-7, polyacrylamide and methacrylic acid are joined in reactor, stir, be heated to 100 ~ 120 DEG C, reaction 2 ~ 3h, product B of lowering the temperature to obtain;
3) join in reactor by methylpropene sodium sulfonate, product A and water, stir, add product B in whipping process, product B adds complete, continues stirring 20 ~ 40min, obtains mixture C;
4) calcium formiate, sucrose and Sunmorl N 60S are mixed, add mixture C, stirring and evenly mixing, obtain concrete slump retaining agent.
6. the preparation method of concrete slump retaining agent according to claim 5, is characterized in that, step 1) in be warming up to 70 DEG C, add methylcellulose gum and continue to be warming up to 95 DEG C, isothermal reaction 2.5h.
7. the preparation method of concrete slump retaining agent according to claim 5, is characterized in that, step 2) in be heated to 110 DEG C, reaction 2.5h.
8. the preparation method of concrete slump retaining agent according to claim 5, is characterized in that, step 3) in mixing speed be 800rpm ~ 1200rpm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113004007A (en) * | 2021-03-10 | 2021-06-22 | 广州市粤晟混凝土有限公司 | High slump-retaining concrete mixture and preparation method thereof |
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| CN102503217A (en) * | 2011-11-08 | 2012-06-20 | 厦门路桥翔通建材科技有限公司 | High slump loss resistant polycarboxylic acid high-performance water reducing agent and preparation method thereof |
| CN102976657A (en) * | 2012-12-04 | 2013-03-20 | 山东宏艺科技股份有限公司 | Slushing agent for concrete 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 |
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| US20110054053A1 (en) * | 2009-09-02 | 2011-03-03 | Lee Chris C | Additives in gypsum panels and adjusting their proportions |
| CN102503217A (en) * | 2011-11-08 | 2012-06-20 | 厦门路桥翔通建材科技有限公司 | High slump loss resistant polycarboxylic acid high-performance water reducing agent and preparation method thereof |
| CN102976657A (en) * | 2012-12-04 | 2013-03-20 | 山东宏艺科技股份有限公司 | Slushing agent for concrete 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 |
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| CN113004007A (en) * | 2021-03-10 | 2021-06-22 | 广州市粤晟混凝土有限公司 | High slump-retaining concrete mixture and preparation method thereof |
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Application publication date: 20160120 |