CN102935658A - Method and device for concrete electrical heating maintenance - Google Patents
Method and device for concrete electrical heating maintenance Download PDFInfo
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- CN102935658A CN102935658A CN2012104420489A CN201210442048A CN102935658A CN 102935658 A CN102935658 A CN 102935658A CN 2012104420489 A CN2012104420489 A CN 2012104420489A CN 201210442048 A CN201210442048 A CN 201210442048A CN 102935658 A CN102935658 A CN 102935658A
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Abstract
The invention discloses a method and a device for concrete electrical heating maintenance at the lower temperature. When steel bar installation, embedded part placement and welding operation are completed, the electrical heating maintenance device is utilized, a heating band is laid, the heating band is fixed on a cast-in-situ component steel bar by a fixing band, when the heating band is detected to be intact, the concrete is poured, the heating band is powered on to heat the concrete, the heating maintenance device is subjected to a dynamic regulation according to real-time temperature acquisition data, once the concrete is heated to the preset upper limit temperature, a temperature braking device in the electrical heating maintenance device can automatically disconnect the power, and when the temperature of the concrete is decreased, the temperature braking device can automatically connect the power and heat the concrete again. The method and the device for the concrete electrical heating maintenance are applicable for concrete drying and hardening of new-built buildings.
Description
Technical field
The present invention relates to a kind of cast-in-place concrete maintenance process in winter that is applied to, exactly is a kind of concrete electric heating curing method and heating curing device.
Background technology
The concrete that teletostage newly builds is because freezing the concrete strength development of impact, even later stage normal temperature maintenance also can't return to design strength, prevent that if can take measures concrete from enduring cold, allow concrete strength rise under normal temperature conditions more than the permission critical intensity that concrete endures cold in early days, concrete may ultimately reach design strength and does not suffer a loss.Therefore, the maintenance measure of cold weather concrete is extremely important.At present main concrete curing method is divided into two kinds of natural curing and heating curings: natural curing is adopted in cast-in-place concrete under normal operation usually, and maintenance process--outside heating method commonly used in the construction in the winter time.Outside heating method is mainly used in more than the temperature-10 ℃, and the not thick large engineering of member.By heating concrete component ambient air, heat is passed to concrete, or directly to the concrete heating, concrete is under the positive temperature condition can harden normally.1. stove heating.Generally use in less building site, method is simple, but indoor temperature is not high, and relatively drying, and the CO2 that emits can make newly-laid concrete surface carbonization, affects quality.2. steam heated.With steam concrete is hardened under wet heat condition.This method is more easy to control, and heating-up temperature is even.But because it needs special boiler plant, expense is higher.And heat loss is larger, and working condition is also undesirable.3. infrared heating.With high temp. electrical heater or gas infrared generator, concrete is sealed the width of cloth penetrate heating.4. electrical heating.Reinforcing bar as electrode, or is attached to concrete surface with electric heater, and power transformation can become heat energy, to improve concrete temperature.This method is simple and convenient, and heat loss is less, and is easy to control, but that weak point is power consumption is relatively large.At present along with constantly the promoting the use of of skyscraper and mass concrete component, the impact of the factor such as these passive outside maintenance processes are subjected to the job site building storey high, and member is large, more and more inconvenience refers to use at the scene.
Summary of the invention
For the deficiencies in the prior art, adapt to the building structure construction technique and construction environment in winter become increasingly complex, the purpose of this invention is to provide a kind of concrete electric heating curing method and heating curing device.The method and device are take electric power as the energy, and heating tape is heater, according to Joule's law: Q=I2Rt, by shirtsleeve operation at short notice, 100% electric energy almost are converted to heat energy.This method and device can use in concrete drying and sclerosis, shorten the dry time of concrete, can shorten whole construction period, bring very large economic benefit.The heating tape can directly place in the concrete, prevents that concrete from freezing, and accelerates its sclerosis, even in very cold season, also can just template be removed in three days, and basic heat supply is provided in architectural process.Be applicable to the concrete of new building dry with sclerosis in use.
For achieving the above object, the technical solution adopted for the present invention to solve the technical problems is:
A kind of concrete electric heating curing method, its concrete technology is: finish after reinforcement installation, built-in fitting placement and the welding job, use the electrical heating curing means, lay the heating tape according to the heating tape layout drawing, with fixed band the heating tape is fixed on the site concrete reinforcing bar.Intact after-pouring concrete is detected in the heating tape, and the heating tape energising is heated concrete.According to the real time temperature image data heating curing device is dynamically adjusted, in case concrete is heated to predefined ceiling temperature, temperature brake apparatus in the electrical heating curing means is with automatic cut-off power, after treating that concrete temperature descends, the temperature brake apparatus heats automatic plugged again to concrete.
In the described heating process, overlay Insulation at member, coat insulation material.
A kind of concrete electric heating curing device comprises and adopts heating tape, ammeter, temperature sensor, Acquisition Instrument, distribution box, 220V power supply.
Described temperature sensor one end places concrete members temperature control key position, and the other end is connected with Acquisition Instrument, is used for the Real-Time Monitoring concrete temperature and changes.
Described distribution box adopts hanging or console body structure; be divided into indoor, outdoor two kinds of moulding; the feed cable import is at bottom half; in main circuit breaker is housed; the shunt earth leakage circuit breaker; deliver newspapers alarm device and control system are used for Circuits System protection, adjustment, temperature alarming outage, rewarming contact etc., reach automatic operating.
Described distribution box one end feed cable import is at bottom half, and the other end is connected with the heating tape.
Described distribution box one end feed cable import is at bottom half, and the other end is connected with Acquisition Instrument.
Described heating tape is provided with anticorrosion crust, avoids concrete to the corrosion of heating tape.
Concrete electric heating curing method of the present invention and the heating curing device most important are exactly to pass through concrete active maintenance, reduce to greatest extent the low duration restriction that causes of Yin Wendu, prevent that concrete from freezing, accelerate its sclerosis, even in very cold season, also can just template be removed in three days, and basic heat supply is provided in architectural process.Be applicable to simultaneously the concrete of new building dry with sclerosis in use.
The present invention's advantage compared with prior art is:
Because the heating tape is evenly arranged in concrete component inside, therefore can be directly to the concrete heating, homogeneous heating, the efficiency of heating surface is high; Mode of heating from inside to outside, the component surface heat loss is few, energy savings; Can use in any job site, do not built the impact of height size; It is simple and safe to construct, and is difficult for causing electric shock accidents.
Description of drawings
Fig. 1 is cast-in-place concrete wall heating tape and heating curing Plant arrangement schematic diagram.
Fig. 2 is cast-in-situ concrete columns, wall heating tape and heating curing Plant arrangement schematic diagram.
Fig. 3 is cast-in-situ concrete beam, plate heating tape and heating curing Plant arrangement schematic diagram.
Description of reference numerals is as follows
1-heating tape 2-distribution box
3-temperature transducer 4-thermometric Acquisition Instrument
5-cast-in-place concrete wall 6-cast-in-situ concrete columns
7-cast in place concrete plate 8-cast-in-place concrete span centre beam
9-cast-in-place concrete side bar.
The specific embodiment
The present invention is described in detail below in conjunction with accompanying drawing:
As shown in Figure 1, according to heating condition, according to snakelike layout heating tape 1, heating tape 1 is fixed on the bar-mat reinforcement, and heating tape 1 one ends are connected with distribution box 2, and the other end is carried out insulation processing, in the Transducers Embedded in Concrete; At the concrete component center and edge placement temperature sensor 3, the data of temperature sensor 3 are gathered by thermometric Acquisition Instrument 4.
As shown in Figure 2, cast-in-situ concrete columns 6, wall 5, according to heating condition, according to snakelike layout heating tape 1, heating tape 1 is fixed on the bar-mat reinforcement, and heating tape 1 one ends are connected with distribution box 2, and the other end is carried out insulation processing, in the Transducers Embedded in Concrete; At the concrete component center and edge placement temperature sensor 3, the data of temperature sensor 3 are gathered by thermometric Acquisition Instrument 4.
As shown in Figure 3, cast-in-situ concrete beam 8,9 plates 7, according to heating condition, according to snakelike layout heating tape 1, heating tape 1 is fixed on the bar-mat reinforcement, and heating tape 1 one ends are connected with distribution box 2, and the other end is carried out insulation processing, in the Transducers Embedded in Concrete; At the concrete component center and edge placement temperature sensor 3, the data of temperature sensor 3 are gathered by thermometric Acquisition Instrument 4.
Using above-mentioned heating curing method specific implementation method is:
The installation requirement of heating tape: with fixed band heating tape 1 is fixed on the site concrete reinforcing bar, on any point, heating cable does not all allow to connect to take; According to heating condition, comprise scantling, size, form is arranged the heating tape according to even, principle of continuity; The spacing of laying the heating tape is 100mm～1200mm; The heating tape will place the center of member as far as possible, is placed in the concrete, does not allow to contact template; Do not allow from concrete, to expose.
Electrical heating maintenance step and requirement: after the concreting, whether intact, open immediately the heating tape power supply if detecting the heating tape; Energising duration of heat is 30min～72 h; Every 30min carries out temperature detection; Per hour temperature increases or reduces 2 ℃～5 ℃, and the temperature difference of concrete and surrounding environment can not be crossed 25 ℃; After reaching the maximum temperature of appointment, the concrete heated at constant temperature stage begins; Concrete vibrating will be avoided the heating tape.
More than concrete electric heating curing method provided by the present invention and heating curing device are described in detail; used concrete case herein principle of the present invention and embodiment have been done elaboration; these are implemented an explanation of example and just are used for helping to understand method of the present invention and core concept; simultaneously for one of ordinary skill in the art; according to thought of the present invention; all will change in specific embodiments and applications; no matter but do what kind of variation; every have a technology case identical or close with the present invention, all within its protection domain.
Claims (5)
1. concrete electric heating curing method, it is characterized in that: finish reinforcement installation, after built-in fitting placement and the welding job, use the electrical heating curing means, lay the heating tape, with fixed band the heating tape is fixed on the site concrete reinforcing bar, intact after-pouring concrete is detected in the heating tape, the heating tape energising, to the concrete heating, according to the real time temperature image data heating curing device is dynamically adjusted, in case concrete is heated to predefined ceiling temperature, temperature brake apparatus in the electrical heating curing means is with automatic cut-off power, after treating that concrete temperature descends, the temperature brake apparatus heats automatic plugged again to concrete.
2. concrete electric heating curing method according to claim 1, it is characterized in that: when being fixed on the heating tape on the site concrete reinforcing bar with fixed band, on any point, heating cable does not all allow to connect to take; According to heating condition, arrange the heating tape according to even, principle of continuity; The heating tape will place the center of member as far as possible, is placed in the concrete, does not allow to contact template; Do not allow from concrete, to expose.
3. concrete electric heating curing method according to claim 1 is characterized in that: after the concreting, whether intact, open immediately the heating tape power supply if detecting the heating tape; Energising duration of heat is 30min～72 h; Every 30min carries out temperature detection; Per hour temperature increases or reduces 2 ℃～5 ℃, and the temperature difference of concrete and surrounding environment can not be crossed 25 ℃; After reaching the maximum temperature of appointment, the concrete heated at constant temperature stage begins; Concrete vibrating will be avoided the heating tape.
4. the electrical heating curing means in the concrete electric heating curing as claimed in claim 1; comprise the heating tape; ammeter; temperature sensor; Acquisition Instrument; distribution box; the 220V power supply; it is characterized in that: temperature sensor one end places concrete members; the other end is connected with Acquisition Instrument; being used for the Real-Time Monitoring concrete temperature changes; distribution box adopts hanging or console body structure; be divided into indoor; outdoor two kinds of moulding; the feed cable import is at bottom half, in main circuit breaker is housed, earth leakage circuit breaker along separate routes; deliver newspapers alarm device and control system; be used for the Circuits System protection; adjustment; the temperature alarming outage; the rewarming contact reaches automatic operating, and distribution box one end feed cable import is at bottom half; the other end is connected with the heating tape, and the cable other end also is connected with Acquisition Instrument.
5. concrete electric heater according to claim 4, it is characterized in that: the heating tape is provided with anticorrosion crust, avoids concrete to the corrosion of heating tape.
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| CN2012104420489A CN102935658A (en) | 2012-11-08 | 2012-11-08 | Method and device for concrete electrical heating maintenance |
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| CN2012104420489A CN102935658A (en) | 2012-11-08 | 2012-11-08 | Method and device for concrete electrical heating maintenance |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103171041A (en) * | 2013-04-09 | 2013-06-26 | 中建三局第二建设工程有限责任公司 | Auxiliary curing method for cold weather concrete by electric heating tapes |
| CN103213193A (en) * | 2013-03-26 | 2013-07-24 | 沈阳建筑大学 | Heating maintenance method and heating maintenance device for retard-bonded prestressed concrete |
| CN103255766A (en) * | 2013-06-03 | 2013-08-21 | 徐萍 | Heating device heating cemented soil in temperature-control mode and using method thereof |
| CN104675118A (en) * | 2015-02-11 | 2015-06-03 | 刘明瑞 | Electric heating technology for winter concrete construction |
| CN104790533A (en) * | 2015-04-27 | 2015-07-22 | 沈阳建筑大学 | Fabricated structure preformed hole slurry anchoring lap construction method under low-temperature environment |
| CN107338785A (en) * | 2017-09-05 | 2017-11-10 | 中国科学院寒区旱区环境与工程研究所 | A kind of freezing soil prevention and control system automatic temperature-controlled based on electrical blanket |
| CN107338787A (en) * | 2017-09-05 | 2017-11-10 | 中国科学院寒区旱区环境与工程研究所 | A kind of temperature control freezing soil prevention and control system of automatic deploying and retracting formula |
| CN109930458A (en) * | 2019-04-09 | 2019-06-25 | 河南高速公路发展有限责任公司安新分公司 | A method of cement concrete construction member rapid curing is carried out using electric-heating belt |
| CN110590398A (en) * | 2019-08-28 | 2019-12-20 | 中铁大桥局集团第一工程有限公司 | Heating maintenance method for thin-wall concrete of steel-concrete composite beam |
| CN112333854A (en) * | 2020-10-28 | 2021-02-05 | 中国建筑第八工程局有限公司 | Heat tracing electrified heating system and electric heating method for concrete structure |
| CN114776052A (en) * | 2022-04-20 | 2022-07-22 | 中冶南方城市建设工程技术有限公司 | Electric heating maintenance method for pre-embedded concrete wall |
| CN114789504A (en) * | 2022-04-26 | 2022-07-26 | 河南交投交通建设集团有限公司道路材料分公司 | Method for quickly maintaining cement concrete member by utilizing electric tracing band |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103213193A (en) * | 2013-03-26 | 2013-07-24 | 沈阳建筑大学 | Heating maintenance method and heating maintenance device for retard-bonded prestressed concrete |
| CN103171041A (en) * | 2013-04-09 | 2013-06-26 | 中建三局第二建设工程有限责任公司 | Auxiliary curing method for cold weather concrete by electric heating tapes |
| CN103255766A (en) * | 2013-06-03 | 2013-08-21 | 徐萍 | Heating device heating cemented soil in temperature-control mode and using method thereof |
| CN103255766B (en) * | 2013-06-03 | 2016-06-22 | 徐萍 | The heater of a kind of temperature control heating soil cement and using method thereof |
| CN104675118A (en) * | 2015-02-11 | 2015-06-03 | 刘明瑞 | Electric heating technology for winter concrete construction |
| CN104790533A (en) * | 2015-04-27 | 2015-07-22 | 沈阳建筑大学 | Fabricated structure preformed hole slurry anchoring lap construction method under low-temperature environment |
| CN107338785A (en) * | 2017-09-05 | 2017-11-10 | 中国科学院寒区旱区环境与工程研究所 | A kind of freezing soil prevention and control system automatic temperature-controlled based on electrical blanket |
| CN107338787A (en) * | 2017-09-05 | 2017-11-10 | 中国科学院寒区旱区环境与工程研究所 | A kind of temperature control freezing soil prevention and control system of automatic deploying and retracting formula |
| CN109930458A (en) * | 2019-04-09 | 2019-06-25 | 河南高速公路发展有限责任公司安新分公司 | A method of cement concrete construction member rapid curing is carried out using electric-heating belt |
| CN110590398A (en) * | 2019-08-28 | 2019-12-20 | 中铁大桥局集团第一工程有限公司 | Heating maintenance method for thin-wall concrete of steel-concrete composite beam |
| CN112333854A (en) * | 2020-10-28 | 2021-02-05 | 中国建筑第八工程局有限公司 | Heat tracing electrified heating system and electric heating method for concrete structure |
| CN112333854B (en) * | 2020-10-28 | 2023-03-24 | 中国建筑第八工程局有限公司 | Heat tracing electrified heating system and electric heating method for concrete structure |
| CN114776052A (en) * | 2022-04-20 | 2022-07-22 | 中冶南方城市建设工程技术有限公司 | Electric heating maintenance method for pre-embedded concrete wall |
| CN114789504A (en) * | 2022-04-26 | 2022-07-26 | 河南交投交通建设集团有限公司道路材料分公司 | Method for quickly maintaining cement concrete member by utilizing electric tracing band |
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Application publication date: 20130220 |