CN103304179A - Concrete composite liquid anti-freezing pumping agent - Google Patents
Concrete composite liquid anti-freezing pumping agent Download PDFInfo
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- CN103304179A CN103304179A CN2013102581086A CN201310258108A CN103304179A CN 103304179 A CN103304179 A CN 103304179A CN 2013102581086 A CN2013102581086 A CN 2013102581086A CN 201310258108 A CN201310258108 A CN 201310258108A CN 103304179 A CN103304179 A CN 103304179A
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Abstract
The invention provides a concrete composite liquid anti-freezing pumping agent and belongs to the technical field of the concrete pumping agent. The pumping agent is composed of the following components: a low-concentration naphthalene efficient water reducer, a sulfamate water reducer, sodium nitrite, an organic alcohol, water, sodium gluconate and dry Chinese honeylocust fruit powder, in a weight ratio of 1: 0.385: 0.3: 0.056: 2.017: 0.06: 0.013. The concrete composite liquid anti-freezing pumping agent provided by the invention has the advantages that all the components have synergistic effect to inhibit crystallization of an early strength component at a minus temperature, well control the slump of the concrete and keep development of the early strength of the concrete, and simultaneously, bubbles are introduced into the concrete and neat paste to improve the workability (peaceability) of the concrete and the cement neat paste, and therefore, the adaptability of the liquid anti-freezing pumping agent can be improved and the anti-freezing durability of the concrete can be greatly improved; besides, the anti-freezing pumping agent is free of chlorine, low in alkali, and in the form of a liquid, and thereby more convenient for storage, transportation and use.
Description
Technical field
The invention belongs to the concrete pump-feed agent technical field, be specifically related to the antifreeze pumping agent of the compound liquid of a kind of concrete.
Background technology
In the concrete engineering construction process, concrete transportation and to build be heavy, a critical job.Its requires rapidly, in time, ensure the quality of products and reduce labour consumption.This is with large-scale, high-rise and have more in the modern concrete engineering that complicacy is characteristics and seem important further.So the concrete pumping operating technique is arisen at the historic moment, and become one of sign of modern concrete.
The design of the proportioning of pump concrete be unable to do without admixture, and wherein pumping agent is undoubtedly the most frequently used a kind of.In general construction environment, carry out pumping construction, only mix this a kind of admixture of pumping agent and get final product.
Yet the speed of cement aquation is also closely related with outside temperature except outside the Pass having with the composition material of concrete own and proportioning.Hydration is accelerated when temperature raises, gain in strength is accelerated, and be reduced to 0 ℃ when spending when temperature, be present in the concrete water some begin to freeze, become solid phase (ice) by liquid phase (water) gradually, at this moment the water that participates in cement aquation has reduced, and hydration slows down, and gain in strength is corresponding slack-off.Temperature continues to reduce, and the water in being present in concrete becomes ice fully, and when just becoming solid phase by liquid phase fully, cement aquation stops substantially, and this moment, concrete intensity can not increase again.Because water becomes ice back volume and increases 9% approximately, produce the expansion stress of about 2.5MPa simultaneously, this stress is often greater than the initial strength value of concrete inner formation, makes concrete be subjected in various degree destruction (being early stage frost damage).In addition, after water becomes ice, also can produce the bigger ice slush of particle at aggregate and rebar surface, weaken the cohesive force of grout and aggregate and reinforcing bar.After ice slush melts, also can form various spaces at inside concrete, and reduce concrete weather resistance.Domestic and international many scholars have carried out a large amount of tests to the concrete of winter construction, the result shows: before cement generation hydration stops in the concrete of enduring cold, make concrete reach a minimum critical intensity (China be defined as be not less than design strength 30% and be not less than 3.5MPa), can make concrete not suffer freeze injury, final strength does not incur loss.So prolong the liquid form of coagulation water in soil, make it to have ample time and cement generation hydration reaction, the content that reaches free water in concrete minimum critical intensity and the minimizing concrete is the key that prevents freeze injury of concrete.Need a kind of admixture, it both can give concrete good pumpability for this reason, also can make concrete have resistance to frost, and this admixture namely is antifreeze pumping agent.
At present, it is Sodium Nitrite type, calcium nitrite type and villaumite resistance rust type frostproofer that state's inner concrete deicing pump send agent to use maximum, and these several frostproofers generally all are powder, its alkali content height, volume is big, carrier is many, concrete weather resistance is influenced to some extent, and be unfavorable for pumping construction and concrete commercialization.
For the construction requirement that satisfies commerical ready-mixed concrete and improve concrete weather resistance, be necessary to research and develop out a kind of liquid frostproofer that does not have chlorine, low alkali, high-effect, environment-friendly type.
Summary of the invention
In order to solve the above-mentioned defective of prior art, the invention discloses the antifreeze pumping agent of the compound liquid of a kind of concrete, this antifreeze pumping agent is the low alkali low-dosage liquid compound antifreezer of no chlorine, and it does not contain villaumite, and alkali content is low, and volume is low and antifreezing effect is good.
The objective of the invention is to be achieved through the following technical solutions:
The antifreeze pumping agent of the compound liquid of a kind of concrete, wherein, described pumping agent is made up of the component of following weight ratio: low dense naphthalene high efficiency water reducing agent: sulfamate based water reducer: Sodium Nitrite: organic alcohol: water: Sunmorl N 60S: Chinese honey locust dry powder=1: 0.385: 0.3: 0.056: 2.017: 0.06: 0.013.
The antifreeze pumping agent of the technique scheme compound liquid of described a kind of concrete, wherein, described organic alcohol is ethylene glycol, methyl alcohol or ethylene glycol and the mixture of methyl alcohol according to any ratio.
The antifreeze pumping agent of the technique scheme compound liquid of described a kind of concrete, wherein, the solid content of described sulfamate high-effective water-reducing agent is 32.1%.
The antifreeze pumping agent of the technique scheme compound liquid of described a kind of concrete, wherein, the content of sodium sulfate is 18.1% in the described low dense naphthalene series high-efficiency water-reducing agent.
The antifreeze pumping agent of the compound liquid of concrete of the present invention comprises following component:
(1), low dense naphthalene high efficiency water reducing agent and sulfamate based water reducer are as the diminishing component, effect mainly is diminishing and strengthens two aspects, reduce the concrete mixing water yield on the one hand, mean and reduced congealable water in the concrete, reduced the frost heave stress that water freezes to produce; Reduce water consumption on the other hand, the water cement ratio reduction is conducive to improve concrete strength, strengthens freezing tolerance.
(2), 18.1% sodium sulfate is as accelerating component in the low dense naphthalene series high-efficiency water-reducing agent, main effect is the setting and harden of accelerate concrete, makes it to reach as early as possible freeze proof critical strength; After reaching critical strength, can accelerate concrete hardening speed, overcome the slow phenomenon of gain in strength that subzero temperature, low temperature cause; Accelerating component often has the effect of certain reduction freezing point; But because sodium sulfate solubleness sharply descends under the low temperature, can cause again producing the crystallization precipitation under the antifreeze pumping agent low temperature of liquid, not only influence its homogeneity, and easily stop up transport pipe;
(3), organic pure and mild Sodium Nitrite unites use as antifreezing component, both reduced the content of salts substances in the antifreeze pumping agent of liquid, can improve the dissolving percentage ratio of sodium sulfate again;
Antifreezing component refers to a kind of chemical substance that makes concrete mix avoid freeze injury under the subzero temperature environment, can be divided three classes according to its mode of action: a class is with water very low eutectic temperature to be arranged, have the freezing point that can reduce water and make concrete under subzero temperature, still can carry out hydration, as Sodium Nitrite, sodium-chlor etc.In case concrete still can suffer freeze injury when hanging down because volume deficiency or temperature are crossed.Another kind of is the freezing point that can reduce water, also can make the lattice of the ice that contains such material constitute gross distortion, thereby can't form expansion stress and destroy concrete, as urea, methyl alcohol.When using quantity not sufficient, concrete intensity under subzero temperature stops to increase, but after the temperature of becoming a full member the concrete final strength is not had influence.Though the 3rd class is its aqueous solution very low eutectic temperature is arranged, the freezing point in the concrete is obviously reduced.His effect is directly and cement generation hydration reaction and the setting and harden of accelerate concrete is conducive to the development of concrete strength, as calcium chloride, salt of wormwood;
(4), Chinese honey locust dry powder is as the bleed component, introduces a certain amount of even distribution, airtight, micro-bubble independently in concrete, suppress on the one hand or weaken the bleeding that fresh concrete takes place in the process of building; On the other hand, both for the ice crystal that freezes provides certain expansion space, the seepage water pressure for supercooled water provides a cushioning pocket again, thereby improves concrete freezing tolerance;
(5), Sunmorl N 60S is as the slow setting component, be a kind ofly can postpone hydrated reaction of cement, thereby prolong concrete time of coagulation, be the fresh concrete long period to keep plasticity, convenient cast improves operating efficiency, can not cause detrimentally affect to every performance of concrete later stage simultaneously.
Several component synergies among the present invention, the sulfamate based water reducer in the component overcome because the low low temperature crystallization phenomenon that causes of sodium sulfate solubleness; Organic pure and mild Sodium Nitrite is compound as the antifreeze pumping agent of antifreezing component reflex dispense liquid, to reduce the content of salts substances in the antifreeze pumping agent of liquid, passes through to increase the dissolving percentage ratio of the high sodium sulfate of organic alcohol extracting among the present invention; Sunmorl N 60S has control preferably for concrete slump loss as the retardant admixture, and the development that can keep early age strength of concrete, and the effect of 1+1＞2 has been brought into play in the combination of water reducer and Sunmorl N 60S; The Saponin/TSM powder can be introduced even distribution, sealing, stable micro-bubble as air entrapment agent in concrete and clean slurry, can improve the workability (workability) of concrete and cement paste, adaptability to the antifreeze pumping agent of liquid and cement has the improvement effect, can improve concrete freeze proof weather resistance greatly, simultaneously, concrete construction performance and other Synthesis durability also there is the significant effect of improving.
The organic alcohols antifreezing component is that the antifreeze pumping agent of liquid of methyl alcohol and the compound preparation of ethylene glycol has no adverse effect to negative temperature concrete later strength development among the present invention, even the later strength of promotion accretion is arranged.
The present invention has following beneficial effect:
1, various component synergies in the antifreeze pumping agent of the compound liquid of concrete of the present invention, suppressed the early strong crystallization of component under subzero temperature, for concrete slump loss control is preferably arranged, and the development that can keep early age strength of concrete, simultaneously by in concrete and clean slurry, introducing the workability (workability) that bubble improves concrete and cement paste, adaptability to the antifreeze pumping agent of liquid and cement has the improvement effect, can improve concrete freeze proof weather resistance greatly.
2, the antifreeze pumping agent of the compound liquid of concrete of the present invention can be worked under-15 ℃ of low temperature, is adapted to the teletostage concrete construction of three Norths extremely frigid zones especially and uses.
3, the antifreeze pumping agent of the compound liquid of concrete of the present invention does not have chlorine, low alkali, liquid, the storage of being more convenient for, transportation and use.
Embodiment:
For making technical scheme of the present invention be convenient to understand, below in conjunction with specific embodiment the antifreeze pumping agent of the compound liquid of concrete of the present invention is further described.
Embodiment 1:The antifreeze pumping agent of the compound liquid of concrete of the present invention:
Take by weighing following substances by weight:
Wherein organic alcohol is selected from mixture a kind of of ethylene glycol, methyl alcohol or ethylene glycol and any ratio of methyl alcohol; Ratio between organic alcohol and the low dense naphthalene high efficiency water reducing agent is 1: 0.056.
The antifreeze pumping agent of the compound liquid of concrete will namely be got behind the above-mentioned substance mixing.
Embodiment 2:The antifreeze pumping agent of the compound liquid of concrete of the present invention:
Take by weighing the material of following weight:
The antifreeze pumping agent of the compound liquid of concrete will namely be got behind the above-mentioned substance mixing.
Organic alcohol in the present embodiment is selected from mixture a kind of of ethylene glycol, methyl alcohol or ethylene glycol and any ratio of methyl alcohol; Ratio between organic alcohol and the low dense naphthalene high efficiency water reducing agent is 1: 0.056.
In order better to understand beneficial effect of the present invention, below by testing the effect that example illustrates that the antifreeze pumping agent of the compound liquid of concrete of the present invention has.
Test example 1:
The antifreeze pumping agent of the compound liquid of concrete to embodiment 2 preparation gained is tested cement consumption 330kg/m by frostproofer standard JC475-2004
3, the volume of the antifreeze pumping agent of liquid is 2.5% of cement consumption, and specified temperature is-15 ℃, and assay sees the following form 1:
The antifreeze pumping agent performance test of table 1 result
As shown in Table 1, this antifreeze pumping agent water-reducing rate reaches 19.8%, is not less than 10% set quota considerably beyond acceptable end product, eliminates the internal cause that causes frost heave thereby reached by diminishing, improve the concentration of capillary water Lu frostproofer, refinement kapillary and the purpose of improving pore structure; The subzero temperature temperature back intensity of becoming a full member increases rapidly, and is less to concrete effect of contraction.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any formal and substantial restriction, all those skilled in the art, in not breaking away from the technical solution of the present invention scope, when can utilizing the above technology contents that discloses, and a little change of making, modify the equivalent variations with differentiation, be equivalent embodiment of the present invention; Simultaneously, the change of any equivalent variations that all foundations essence technology of the present invention is done above embodiment, modify and differentiation, all still belong in the scope of technical scheme of the present invention.
Claims (4)
1. antifreeze pumping agent of the compound liquid of concrete is characterized in that described pumping agent is made up of the component of following weight ratio:
Low dense naphthalene high efficiency water reducing agent: sulfamate based water reducer: Sodium Nitrite: organic alcohol: water: Sunmorl N 60S: Chinese honey locust dry powder=1: 0.385: 0.3: 0.056: 2.017: 0.06: 0.013.
2. the antifreeze pumping agent of the compound liquid of a kind of concrete according to claim 1, it is characterized in that: described organic alcohol is ethylene glycol, methyl alcohol or ethylene glycol and the mixture of methyl alcohol according to any ratio.
3. the antifreeze pumping agent of the compound liquid of a kind of concrete according to claim 1, it is characterized in that: the solid content of described sulfamate high-effective water-reducing agent is 32.1%.
4. the antifreeze pumping agent of the compound liquid of a kind of concrete according to claim 1 is characterized in that: the content of sodium sulfate is 18.1% in the described low dense naphthalene series high-efficiency water-reducing agent.
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| CN2013102581086A CN103304179A (en) | 2013-06-26 | 2013-06-26 | Concrete composite liquid anti-freezing pumping agent |
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| CN2013102581086A CN103304179A (en) | 2013-06-26 | 2013-06-26 | Concrete composite liquid anti-freezing pumping agent |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104556878A (en) * | 2015-01-06 | 2015-04-29 | 安徽省无为县泉塘预制厂 | Novel frost-resistant concrete |
| CN106830735A (en) * | 2017-01-18 | 2017-06-13 | 江苏中铁奥莱特新材料股份有限公司 | A kind of concrete antifreezing pumping aid and preparation method thereof |
| CN109160763A (en) * | 2018-09-12 | 2019-01-08 | 十堰市郧阳区成林工贸有限责任公司 | Novel high-strength pumping admixture and its preparation method and application |
| CN109503023A (en) * | 2018-12-27 | 2019-03-22 | 山西黄腾化工有限公司 | A kind of pumping agent for concrete and its production technology |
| CN111253105A (en) * | 2020-03-20 | 2020-06-09 | 中国能源建设集团西北电力建设工程有限公司 | Concrete antifreezing pumping agent for high-alkali areas and preparation method thereof |
| CN111620592A (en) * | 2020-06-10 | 2020-09-04 | 山西黄腾化工有限公司 | Adaptive comprehensive liquid polycarboxylate superplasticizer |
| CN115353316A (en) * | 2022-09-16 | 2022-11-18 | 中建研科技股份有限公司 | Fine stone concrete additive and preparation method thereof |
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| CN1247173A (en) * | 1998-09-08 | 2000-03-15 | 帅希文 | Application of saponin in concrete |
| CN102603225A (en) * | 2012-03-14 | 2012-07-25 | 内蒙古科技大学 | Concrete pumping antifreezing agent with adjustable performances |
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2013
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| CN1247173A (en) * | 1998-09-08 | 2000-03-15 | 帅希文 | Application of saponin in concrete |
| CN102603225A (en) * | 2012-03-14 | 2012-07-25 | 内蒙古科技大学 | Concrete pumping antifreezing agent with adjustable performances |
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| 周华新: "防冻组分对液体防冻泵送剂性能影响的研究", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104556878A (en) * | 2015-01-06 | 2015-04-29 | 安徽省无为县泉塘预制厂 | Novel frost-resistant concrete |
| CN106830735A (en) * | 2017-01-18 | 2017-06-13 | 江苏中铁奥莱特新材料股份有限公司 | A kind of concrete antifreezing pumping aid and preparation method thereof |
| CN109160763A (en) * | 2018-09-12 | 2019-01-08 | 十堰市郧阳区成林工贸有限责任公司 | Novel high-strength pumping admixture and its preparation method and application |
| CN109503023A (en) * | 2018-12-27 | 2019-03-22 | 山西黄腾化工有限公司 | A kind of pumping agent for concrete and its production technology |
| CN111253105A (en) * | 2020-03-20 | 2020-06-09 | 中国能源建设集团西北电力建设工程有限公司 | Concrete antifreezing pumping agent for high-alkali areas and preparation method thereof |
| CN111620592A (en) * | 2020-06-10 | 2020-09-04 | 山西黄腾化工有限公司 | Adaptive comprehensive liquid polycarboxylate superplasticizer |
| CN115353316A (en) * | 2022-09-16 | 2022-11-18 | 中建研科技股份有限公司 | Fine stone concrete additive and preparation method thereof |
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Application publication date: 20130918 |