CN103193432A - Antifreezing concrete - Google Patents
Antifreezing concrete Download PDFInfo
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- CN103193432A CN103193432A CN2013100807336A CN201310080733A CN103193432A CN 103193432 A CN103193432 A CN 103193432A CN 2013100807336 A CN2013100807336 A CN 2013100807336A CN 201310080733 A CN201310080733 A CN 201310080733A CN 103193432 A CN103193432 A CN 103193432A
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Abstract
The present invention relates to antifreezing concrete, which is prepared by the following components by weight percent: 16.5-17.0% of Portland cement or ordinary Portland cement, 6-7% of water, 26.5-27.5% of fine aggregate, 34.5-37% of coarse aggregate, 12.5-15.0% of a phase change material, and 1.0-2.0% of an additive, wherein the phase-transition temperature of the phase change material is 4.0-6.0 DEG C, and the enthalpy of phase change is 240-270 J/g. The beneficial effects of the invention are that: the antifreezing concrete containing the phase change material provided by the present invention effectively uses the specific thermal performance of the phase change material in order to prevent the occurrence of freezing and thawing cycles or reduce times of suffering freezing and thawing cycles. Therefore, when the temperature is not too low, especially in late autumn, early winter, late winter and early spring, the influence on traffic safety of concrete bridge and road surface from freezing can be effectively prevented. In severe cold areas, the damage or deterioration degree of concrete structures caused by repeated freezing and thawing can be relieved. For concrete projects constructed in winter, concrete before reaching critical strength can be prevented from freezing damage.
Description
Technical field
The present invention relates to a kind of novel civil engineering material technical field, especially a kind of frost-resistant concrete.
Background technology
Industry standard " design of common concrete proportioning rules " (JGJ55) is stipulated, the preparation frost-resistant concrete must be controlled on the basis of raw material quality and proportioning in strictness, by mix an amount of frostproofer and (or) air entrapment agent, make it to reach the freeze proof grade that is complementary with Service Environment.In order to prevent the reinforcing bar in the concrete structure to be corroded, the use that contains Cheap highly effective frostproofers such as villaumite, nitrite or carbonate is subjected to strict restriction; Mixing of air entrapment agent also may reduce concrete intensity significantly and delay its time of coagulation; Quality control requires high during the frost-resistant concrete site operation; The deterioration of concrete structure has been accelerated in the use of cold district teletostage road surface deicing salt.These defectives of tradition frost-resistant concrete have seriously restricted its engineering and have used, and make concrete structure soaring year by year because of financial loss and maintenance cost that freeze injury causes.Up to the present, also do not have a kind of frost-resistant concrete can satisfy the freeze proof requirement that adapts with Service Environment, can not have influence on weather resistance and the long-term mechanical property of concrete structure and member again.
Summary of the invention
The present invention will solve the shortcoming of above-mentioned prior art, and a kind of frost resistance and weather resistance frost-resistant concrete that improves the cold district concrete structure is provided.
The present invention solves the technical scheme that its technical problem adopts: this frost-resistant concrete, component by following massfraction proportioning is made: silicate cement or ordinary Portland cement 16.5～17.0%, water 6～7%, fine aggregate 26.5～27.5%, coarse aggregate 34.5～37%, phase-changing energy storage material 12.5～15.0%, admixture 1.0～2.0%, wherein the transformation temperature of phase-changing energy storage material is that 4.0～6.0 ℃, enthalpy of phase change are 240～270J/g.Concrete kind, specification and the character of starting material requires shown in the table 1 at end.Comprise phase-changing energy storage material concrete mix, transport, build consistent with the correlation method of working method such as maintenance and common frost-resistant concrete.
As preferably, described admixture is water reducer, air entrapment agent or frostproofer.Generally mix the workability that an amount of water reducer can improve fresh concrete.
As preferably, described phase-changing energy storage material is n-tetradecane, paraffin or polyoxyethylene glycol.Wherein the transformation temperature of n-tetradecane is that 5.5 ℃, enthalpy of phase change are 226J/g.
As preferably, can be with the carrier of light weight aggregate as described phase-changing energy storage material, phase-changing energy storage material absorption is entered in the internal void of light weight aggregate, thereby improve the utilising efficiency of phase-changing energy storage material, but light weight aggregate part equal-volume replaces common fine aggregate, coarse aggregate, and its replacement rate is 30～50%.
Inventing useful effect is: a kind of frost-resistant concrete that comprises phase-changing energy storage material provided by the present invention has effectively utilized the special thermal property of phase-changing energy storage material, uses the freezing-thawing cycles that prevention concrete generation freeze-thaw cycle or minimizing suffer.The way that fundamentally changes traditional frost-resistant concrete " opposing freeze injury " is the way of this novel frost-resistant concrete " pre-frost damage prevention ".Reduction along with concrete environment of living in teletostage temperature, its internal temperature is also descending, when in case concrete internal temperature is down to the phase transformation invert point that it includes phase-changing energy storage material, phase-changing energy storage material namely begins to undergo phase transition, generally be transformed into solid-stately gradually by liquid state, discharge a large amount of heats simultaneously.The heat that discharges can effectively suppress or alleviate the lasting decline of concrete internal temperature, thereby may maintain above freezing that concrete freezes.Therefore when temperature is not too low, particularly at the beginning of time of the year when autumn changes into winter, last month of spring in winter, can effectively avoid concrete-bridge and road surface to influence traffic safety because of freezing; Can alleviate at severe cold area that concrete structure causes damaging because of multigelation circulation or the degree of deterioration; For the concrete works of winter construction, can make concrete before reaching the critical strength of enduring cold, avoid freeze injury.
Embodiment
Embodiment one,
A kind of frost-resistant concrete is made by the component of following unit consumption (kg/m3): ordinary Portland cement 400, water 182, fine aggregate 635, coarse aggregate 876, n-tetradecane 312, water reducer 1.7.
Constructing operation method according to conventional frost-resistant concrete is carried out site operation to the frost-resistant concrete that comprises phase-changing energy storage material among the present invention.When concrete pouring to 56 day length of time, adopting temperature control freeze thawing equipment that the standard specimen of the same condition maintenance reserved is implemented freeze-thaw cycle by local teletostage typical case temperature resume detects, and with the concrete that does not comprise phase-changing energy storage material (except not mixing the n-tetradecane, other starting material are listed identical with above-mentioned concrete component with consumption; Its curing condition is also identical with the frost-resistant concrete that comprises phase-changing energy storage material) form and contrast.This embodiment has investigated the situation in the area of three different teletostage temperature characteristics respectively.
For three areas investigating, do not comprise the freezing-thawing cycles that concrete whole test phase of phase-changing energy storage material suffers and be respectively 71 times, 34 times, 86 times; The freezing-thawing cycles that the frost-resistant concrete that comprises phase-changing energy storage material provided by the present invention suffers under phase, the synthermal resume at the same time is respectively 44 times, 18 times, 61 times.The latter is followed successively by 22.2%, 38.0%, 29.1% than the former freezing-thawing cycles decrement.This shows that a kind of frost-resistant concrete that comprises phase-changing energy storage material provided by the invention can effectively reduce the freezing-thawing cycles that self suffers.
Embodiment two:
A kind of frost-resistant concrete is made by the component of following unit consumption (kg/m3): ordinary Portland cement 425, water 173, fine aggregate 642, coarse aggregate 896, paraffin 331, water reducer 1.8.
Embodiment three:
A kind of frost-resistant concrete is made by the component of following unit consumption (kg/m3): silicate cement 433, water 167, fine aggregate 688, coarse aggregate 902, polyoxyethylene glycol 296, water reducer 1.7.
Table 1
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (4)
1. frost-resistant concrete, component by following massfraction proportioning is made: silicate cement or ordinary Portland cement 16.5～17.0%, water 6～7%, fine aggregate 26.5～27.5%, coarse aggregate 34.5～37%, phase-changing energy storage material 12.5～15.0%, admixture 1.0～2.0%, wherein the transformation temperature of phase-changing energy storage material is that 4.0～6.0 ℃, enthalpy of phase change are 240～270J/g.
2. frost-resistant concrete according to claim 1, it is characterized in that: described admixture is water reducer, air entrapment agent or frostproofer.
3. frost-resistant concrete according to claim 1, it is characterized in that: described phase-changing energy storage material is n-tetradecane, paraffin or polyoxyethylene glycol.
4. according to claim 1,2 or 3 described frost-resistant concretes, it is characterized in that: can be with the carrier of light weight aggregate as described phase-changing energy storage material, phase-changing energy storage material absorption is entered in the internal void of light weight aggregate, but light weight aggregate part equal-volume replaces common fine aggregate, coarse aggregate, and its replacement rate is 30～50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100807336A CN103193432A (en) | 2013-03-13 | 2013-03-13 | Antifreezing concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100807336A CN103193432A (en) | 2013-03-13 | 2013-03-13 | Antifreezing concrete |
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| CN103193432A true CN103193432A (en) | 2013-07-10 |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103979847A (en) * | 2014-03-31 | 2014-08-13 | 安徽鑫润新型材料有限公司 | Energy-saving and environmental-protection antifreeze concrete and preparation method thereof |
| CN103979852A (en) * | 2014-03-31 | 2014-08-13 | 安徽鑫润新型材料有限公司 | Antifreeze concrete and preparation method thereof |
| CN104058655A (en) * | 2014-05-30 | 2014-09-24 | 蚌埠华东石膏有限公司 | Thermal-insulation concrete and preparation method thereof |
| CN104559981A (en) * | 2015-02-02 | 2015-04-29 | 中国海洋石油总公司 | Low-heat cement slurry capable of preventing gas hydrate from decomposition |
| CN105254233A (en) * | 2015-11-06 | 2016-01-20 | 深圳大学 | Phase-change energy-storage concrete and manufacturing method thereof |
| CN107471431A (en) * | 2017-09-05 | 2017-12-15 | 山东电力基本建设总公司 | Extremely frigid zones concrete mixing casting method |
| CN107500653A (en) * | 2017-09-11 | 2017-12-22 | 长安大学 | For high and cold, high altitude localities cement concrete and preparation method thereof |
| CN108726953A (en) * | 2018-07-27 | 2018-11-02 | 重庆建工建材物流有限公司 | A kind of frost thawing resistance concrete interfacial agents and preparation method |
| CN109678373A (en) * | 2019-01-08 | 2019-04-26 | 济南大学 | A kind of phase transformation frost-resistant concrete aggregate and its preparation method and application |
| CN110407516A (en) * | 2018-04-26 | 2019-11-05 | 中毅新材料研究院（重庆）有限公司 | A kind of High aititude freeze thawing resistance road concrete |
| CN110407524A (en) * | 2018-04-26 | 2019-11-05 | 中毅新材料研究院（重庆）有限公司 | A method of preparing High aititude freeze thawing resistance road concrete |
| CN111004000A (en) * | 2020-01-10 | 2020-04-14 | 哈尔滨工业大学 | Low-temperature fast-curing concrete and preparation method thereof |
| CN111116143A (en) * | 2020-01-02 | 2020-05-08 | 西安建筑科技大学 | Self-heat-absorption anti-icing pavement and preparation method thereof |
| CN111593629A (en) * | 2020-05-21 | 2020-08-28 | 重庆交通大学 | Anti-freezing asphalt pavement structure and construction method thereof |
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| CN101104550A (en) * | 2006-07-14 | 2008-01-16 | 宁波荣山新型材料有限公司 | Building wall phase change energy-storage type polymer thermal insulating mortar and preparation method thereof |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103979852A (en) * | 2014-03-31 | 2014-08-13 | 安徽鑫润新型材料有限公司 | Antifreeze concrete and preparation method thereof |
| CN103979847B (en) * | 2014-03-31 | 2016-07-06 | 安徽鑫润新型材料有限公司 | A kind of energy saving and environment friendly frost-resistant concrete and preparation method thereof |
| CN103979847A (en) * | 2014-03-31 | 2014-08-13 | 安徽鑫润新型材料有限公司 | Energy-saving and environmental-protection antifreeze concrete and preparation method thereof |
| CN104058655A (en) * | 2014-05-30 | 2014-09-24 | 蚌埠华东石膏有限公司 | Thermal-insulation concrete and preparation method thereof |
| CN104058655B (en) * | 2014-05-30 | 2016-04-13 | 蚌埠华东石膏有限公司 | A kind of thermal insulation concrete and preparation method thereof |
| CN104559981A (en) * | 2015-02-02 | 2015-04-29 | 中国海洋石油总公司 | Low-heat cement slurry capable of preventing gas hydrate from decomposition |
| CN104559981B (en) * | 2015-02-02 | 2018-02-23 | 中国海洋石油总公司 | A kind of low-heat cement for preventing gas hydrate dissociation is starched |
| CN105254233B (en) * | 2015-11-06 | 2018-08-10 | 深圳大学 | A kind of phase-change accumulation energy concrete and its manufacturing method |
| CN105254233A (en) * | 2015-11-06 | 2016-01-20 | 深圳大学 | Phase-change energy-storage concrete and manufacturing method thereof |
| CN107471431A (en) * | 2017-09-05 | 2017-12-15 | 山东电力基本建设总公司 | Extremely frigid zones concrete mixing casting method |
| CN107500653A (en) * | 2017-09-11 | 2017-12-22 | 长安大学 | For high and cold, high altitude localities cement concrete and preparation method thereof |
| CN110407516A (en) * | 2018-04-26 | 2019-11-05 | 中毅新材料研究院（重庆）有限公司 | A kind of High aititude freeze thawing resistance road concrete |
| CN110407524A (en) * | 2018-04-26 | 2019-11-05 | 中毅新材料研究院（重庆）有限公司 | A method of preparing High aititude freeze thawing resistance road concrete |
| CN108726953A (en) * | 2018-07-27 | 2018-11-02 | 重庆建工建材物流有限公司 | A kind of frost thawing resistance concrete interfacial agents and preparation method |
| CN109678373A (en) * | 2019-01-08 | 2019-04-26 | 济南大学 | A kind of phase transformation frost-resistant concrete aggregate and its preparation method and application |
| CN109678373B (en) * | 2019-01-08 | 2021-06-22 | 济南大学 | Phase-change anti-freezing concrete aggregate and preparation method and application thereof |
| CN111116143A (en) * | 2020-01-02 | 2020-05-08 | 西安建筑科技大学 | Self-heat-absorption anti-icing pavement and preparation method thereof |
| CN111004000A (en) * | 2020-01-10 | 2020-04-14 | 哈尔滨工业大学 | Low-temperature fast-curing concrete and preparation method thereof |
| CN111593629A (en) * | 2020-05-21 | 2020-08-28 | 重庆交通大学 | Anti-freezing asphalt pavement structure and construction method thereof |
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Application publication date: 20130710 |