CN110528896A - Fully automatic electric hot steam generator Maintenance in Winter concrete construction method - Google Patents
Fully automatic electric hot steam generator Maintenance in Winter concrete construction method Download PDFInfo
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- CN110528896A CN110528896A CN201910793221.1A CN201910793221A CN110528896A CN 110528896 A CN110528896 A CN 110528896A CN 201910793221 A CN201910793221 A CN 201910793221A CN 110528896 A CN110528896 A CN 110528896A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
- C04B40/024—Steam hardening, e.g. in an autoclave
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/24—Safety or protective measures preventing damage to building parts or finishing work during construction
- E04G21/246—Safety or protective measures preventing damage to building parts or finishing work during construction specially adapted for curing concrete in situ, e.g. by covering it with protective sheets
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Architecture (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Civil Engineering (AREA)
- Toxicology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Mechanical Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The present invention relates to the maintenances of winter low temperature Environmental Concrete, specially fully automatic electric hot steam generator Maintenance in Winter concrete construction method.Full-automatic electrical heating steam generator mainly passes through a set of automatic control device, controls water and heating time in flue.Electrothermal tube continuous heating in flue, continually generates steam, passes through the Thermal insulating rubber tube of tape splicing air hole outside venthole, hot steam is sent into the enclosure space for needing to conserve, it is movable upwards using hot steam, so that temperature humidity in enclosure space be made to rise, achieve the purpose that concrete curing.The maintenance project construction that the present invention is suitable for carrying out under winter or low temperature environment is mainly included in the maintenance that day and night temperature is big, low temperature (in subzero) Under Concrete works carries out.
Description
Technical field
The present invention relates to the maintenances of winter low temperature Environmental Concrete, specially fully automatic electric hot steam generator Maintenance in Winter
Concrete construction method.
Background technique
Into winter construction, ambient air temperature declines, and moisture contained by soil, concrete, mortar etc. freezes, and construction material holds
Easy embrittlement brings many difficulties to construction.The concrete curing of winter low temperature environment at present is generally supported using coal-fired steam
Shield, fire coal will bring environmental issue, and coal-fired steam maintenance cost is also higher.
Summary of the invention
The present invention selects electric-heating steam maintenance to guarantee strong concrete aiming at the problem that winter low temperature Environmental Concrete conserves
Degree and properties, specially fully automatic electric hot steam generator Maintenance in Winter concrete construction method.
The present invention adopts the following technical scheme that realization: fully automatic electric hot steam generator Maintenance in Winter concrete is applied
Work engineering method, comprising the following steps:
Preparation of construction:
1) install brooder: brooder size is according to depending on curing concrete volume, using scaffold building skeleton, using plastic cloth,
Tarpaulin carries out covering and heat insulating, and inboard uses plastic cloth, and outside uses tarpaulin, makes to form enclosure space in tarpaulin, in enclosure space
It is conserved, liquefied water, hot steam will not scatter and disappear；
2) steam pipe is distributed in brooder；
3) prepare external water source；
4) install steam engine: the position of steam engine will reasonably select, and both can guarantee that venthole is short at a distance from conserved concrete, can be with
Guarantee that heat losses are few, and can guarantee that construction safety carries out, fence should be set up around steam generator and protected；
5) pipeline installation and junction inspection: steam engine and brooder internal steam pipe pass through steam injection pipe progress piping connection, In
It after all pipelines are installed, each junction to be checked from venthole to steam (vapor) outlet, it is ensured that each junction is not leaked safely
Vapour；It prevents heat loss and causes damages to maintenance personnel；
It is preheated before pouring: the pre-heat treatment being carried out to brooder in advance before concreting, guarantee concrete molding temperature；
Solidifying soil pours: opening on brooder and pours mouth and poured, pours and complete rear enclosed and pour mouth, to infuse during concreting
Meaning is vibrated, to guarantee the quality of concrete entirety；
Be powered maintenance: after the completion of concreting, steam engine being carried out energization maintenance；
Monitoring temperature.
Above-mentioned fully automatic electric hot steam generator Maintenance in Winter concrete construction method, steam pipe are put empty vertical in brooder
To laying, effectively vapor evolution can be made to be recycled in the enclosed space, to comparatively fast improve temperature in space.
Above-mentioned fully automatic electric hot steam generator Maintenance in Winter concrete construction method, external water source selection connection is originally
Water pipe is supplied, and should prepare water butt in advance before maintenance, to prevent the temporary insufficient supply of tap water, guarantees water source
It is sufficient.
Above-mentioned fully automatic electric hot steam generator Maintenance in Winter concrete construction method, steam pipe select outsourcing asbestos yarn
Rubber tube, be distributed steam (vapor) outlet on rubber tube.
Above-mentioned fully automatic electric hot steam generator Maintenance in Winter concrete construction method, steam engine select fully automatic electric to add
Hot steam generator.
Above-mentioned fully automatic electric hot steam generator Maintenance in Winter concrete construction method, brooder concrete cooling to
Ambient temperature difference can remove when being no more than 10 DEG C.
Above-mentioned fully automatic electric hot steam generator Maintenance in Winter concrete construction method, steam injection pipe wrap up dedicated outside
Muff, special-purpose thermal insulation are applied to wrap up in silver color outside tubulose rigid foam and return hot cloth and be made.
Above-mentioned fully automatic electric hot steam generator Maintenance in Winter concrete construction method, lifting thermophase ensure temperature ladder
Degree was at 10~15 degree/2~3 hours, and maximum temperature is 35~45 degree, it is possible to prevente effectively from the generation in crack.
Full-automatic electrical heating steam generator mainly passes through a set of automatic control device, controls water and heating in flue
Time.Electrothermal tube continuous heating in flue, continually generates steam, by the Thermal insulating rubber tube of tape splicing air hole outside venthole,
Hot steam is sent into the enclosure space for needing to conserve, it is movable upwards using hot steam, to make temperature humidity in enclosure space
Rise, achievees the purpose that concrete curing.
The method of the present invention has following technological merit:
1) steam generator is small in size, conveniently moving, the construction site suitable for various environment complexity.
2) maintenance is high-efficient, the outer temperature of concrete can be made comparatively fast to reach rated value under construction or cryogenic conditions in winter.And
And steam itself is liquefied as water and can also play the role of moisture-keeping maintaining to concrete.
3) at low cost.Relative to traditional winter construction concrete curing technique, electric-heating steam conserves relied on main material and is
Water and electricity, traditional coal-fired steam need to put into more fund construction boiler steam room.
4) highly-safe.Full-automatic electrical heating steam generator is now based on the basis of electric-heating steam, Import computer number
According to processing technique, to realize the automation and sequencing of on-site steam maintenance, and meanwhile it is artificial relative to traditional coal-burning boiler steam
Operational safety wants high.
5) social benefit is high, meets the call for " winning blue sky defended war " at this stage.Electric heating steam generator generates steam
No pollution to the environment is without discharge.
The maintenance project construction that the present invention is suitable for carrying out under winter or low temperature environment, is mainly included in day and night temperature
Greatly, the maintenance that low temperature (in subzero) Under Concrete works carries out.
Detailed description of the invention
Fig. 1 is flow chart of the present invention.
Specific embodiment
Construction flow chart of the present invention and key points for operation are described in detail.
Key points for operation:
Preparation of construction:
1. installing brooder: brooder size using scaffold building skeleton, and is reinforced according to depending on curing concrete volume.
Covering reinforcing (inboard uses tarpaulin using plastic cloth, outside) is carried out using plastic cloth, tarpaulin, keeps formation closing in tarpaulin empty
Between, it is conserved in enclosure space, liquefied water, hot steam will not scatter and disappear.
2. being distributed steam pipe in brooder: the quality of maintenance effect directly depends on the distribution of brooder internal steam pipe, steam pipe
It is laid in empty longitudinal direction is put.Effectively vapor evolution can be made to be recycled in the enclosed space, to comparatively fast improve temperature in space
Degree.Steam pipe selects the rubber tube of outsourcing asbestos yarn, thereon EDS maps steam (vapor) outlet.
3. preparing external water source: choosing suitable reasonable external water source, concrete will guarantee sufficient moisture content during maintenance
And suitable temperature, external water source may be selected connection running water pipe and supplied, should prepare substantially to store up in advance before maintenance
Bucket guarantees the abundance at water source to prevent the temporary insufficient supply of tap water.
4. choose rational position install steam engine: the position of steam generator will reasonably select, both can guarantee venthole with
The distance of conserved concrete is short, it is ensured that heat losses are few.It can guarantee that construction safety carries out again.It should be set around steam generator
Vertical fence is protected.Steam engine selects Full-automatic electrical heating steam generator, model NBS-1314, power: 24KW.
5. pipeline installation and junction inspection: after all pipelines are installed, respectively joining from venthole to steam (vapor) outlet
It bears and is checked, it is ensured that each junction does not leak safely vapour.It prevents heat loss and causes damages to maintenance personnel.
It is preheated before pouring: the pre-heat treatment being carried out to brooder in advance before concreting, guarantee concrete molding temperature.
Solidifying soil pours: it is noted that vibrating during concreting, to guarantee the quality of concrete entirety.
Be powered maintenance: after the completion of concreting, steam generator being carried out energization maintenance in time.It is arranged during maintenance
Inspection of the special messenger to generator circuit, prevents local electric leakage.It should prepare diesel-driven generator before being conserved, in advance to prevent from having a power failure
Influence to concrete curing.
Monitoring temperature: steam curing is commonly called as " hydrothermal curing " again, and temperature monitoring is most important during maintenance, concrete curing
Temperature is high, and curing strength is high.Stringenter to temperature requirement, care environments should be arranged special messenger 24 small by temperature difference large effect
When be monitored.
Maintenance quality control
Concrete performance is mainly determined by factors such as concrete component, Concrete and concrete curings.In raw material, cooperation
Than with construction technology it is certain in the case where, the maintenance method of the maintenance of concrete, especially early stage, curing temperature, maintenance humidity,
The control of curing time etc. has an important influence concrete hydrating hardenability, strength development, durability etc..
Curing temperature has a great impact to the development speed of the Early-age behavior of concrete.In general, curing temperature is got over
Height, strength development are faster.Research shows that hydrated reaction of cement will be carried out no longer, strong concrete when temperature is lower than a certain limit value
Degree stops development, this temperature is at -10 DEG C or so.In fact, the water in the case where temperature is lower than 0 DEG C, in concrete
Divide oneself through starting to freeze, this will lead to the frost damage of concrete.Environment locating for the concrete of early stage does not keep filling simultaneously
The humidity divided, may cause moisture in concrete and largely evaporates, consequence: on the one hand influencing cement because of dry dehydration and continues
Aquation;Another aspect concrete drying shrinkage increases, and concrete is made to bear tensile stress caused by shrinking under low-intensity state,
Concrete is caused early crack occur.
Steam pipe should not avoid generating localized hyperthermia when discharging steam directly against beam body and template；Maintenance in Winter exists
Special-purpose thermal insulation set is wrapped up outside steam injection pipe, (special-purpose thermal insulation set is i.e. with tubulose rigid foam to ensure steam regular supply
It wraps up in silver color outside and returns hot cloth and be made).
Steam-cured success or failure key is to control heating and cooling process, especially temperature-fall period, due to coagulation at high temperature
The early anti pressured intension of soil increases comparatively fast, but its tensile strength does not accomplish to increase in proportion, and intensity is low.If falling temperature gradient is excessive
Biggish temperature tensile stress is easy to produce in concrete structure, to generate crack.It is most important in lifting thermophase temperature difference control,
By improving steam-cured condition, reinforcing steam-cured monitoring etc. ensures that temperature gradient can have within the scope of 10~15 degree
Effect avoids the generation in crack.
Pass in and out steam pipe length should be as short as possible, reduce unnecessary elbow, with reduce resistance and ponding simultaneously guarantee must
The service clearance wanted.
Special messenger should be arranged to be responsible for, in periodic measurement canopy and surface temperature of concrete, strict control heating-cooling speed, ascending, descending
Every temperature of 1 hour inspection record when warm, when constant temperature every temperature of 2~3 hours inspection records.
Brooder must can be removed when concrete cooling is to ambient temperature difference no more than 10 DEG C.If there is special circumstances will
When concrete and outside air temperature differ by more than 15 DEG C after brooder is removed, the concrete surface after form removal should be covered, and be made
Its Slow cooling.
The necessary strict guarantee in water source during maintenance, avoids machine dry combustion method and concrete curing from stopping causing concrete quality
Problem.
Energy conservation and environmental protection
Electric-heating steam maintenance is pollution-free relative to coal-fired steam maintenance itself, without discharge, on environment without influence.
Full-automatic steam machine of new generation is low relative to traditional coal-fired steam cost.It only needs to be heated automatically by electric heating
Water becomes steam, and traditional fire coal needs to arrange special messenger and operates, and human factor is larger.
Automatic steam generating apparatus power is 24KW.Consider from power consumption, 24 hours electric costs are than fire coal
It is at low cost.
Performance analysis
Social benefit
The concrete curing of winter low temperature environment, conventionally employed coal-burning boiler steam curing.This mode is in the mistake for generating steam
Cheng Zhong, while generating a large amount of pernicious gas (carbon dioxide, sulfur dioxide, nitrogen oxides) and PM2.5.It is steamed using electric heating
Vapour generator replaces coal-fired steam to conserve the discharge that can effectively reduce polluted gas, on environment without influence.
Economic benefit
Concrete structure uses steam curing, and under the same conditions, traditional coal-burning boiler steam needs to put into more fund and builds
If boiler steam room, then water is heated to be by steam by fire coal.Electric heating steam generator only needs external power supply and outer water receiving
The generation of source progress steam.The investment of fund is saved, economic benefit is obvious.
It is compared by taking 10.5m*6.5m*2.5m cushion cap concrete curing as an example, using the brooder of same distribution steam pipe
It is conserved, Master Cost is identical.Conserve the comparison of two kinds of arrangement and method for construction for 24 hours:
Coal-burning boiler steam:
Set up boiler room (material, artificial): 4000 yuan/* 1,2 days=6000 yuan of 200 yuan/people *, 5 people *
It buys fuel and operation is artificial: 500 yuan/t*1t, 200 yuan/* 2 people=900 yuan for 24 hours
Use tap water: 4.5 yuan/t*4t*24h=432 yuan
Total 432+900=1332 yuan/for 24 hours
Electric heating steam generator:
External power supply: 24KW*24h=633.6 yuan 1.1 yuan/kilowatt hour *
Use tap water: 4.5 yuan/t*1t*24h=108 yuan
Operate labour cost: 200 yuan/* 2 people=400 yuan for 24 hours
Total 633.6+108+400=1141.6 yuan/for 24 hours
Conclusion: 1332-1141.6=190.4 yuan/for 24 hours, construction cost can be effectively reduced.
Environmental benefit
The use of electric heating steam generator substantially can achieve the zero-emission of pollutant, powered, heated by full-automatic regulation,
Heat preservation carries out steam curing, has saved water power.Cost has been saved, there is good environmental benefit.
Claims (8)
1. fully automatic electric hot steam generator Maintenance in Winter concrete construction method, it is characterised in that the following steps are included:
Preparation of construction:
1) install brooder: brooder size is according to depending on curing concrete volume, using scaffold building skeleton, using plastic cloth,
Tarpaulin carries out covering reinforcing, and inboard uses plastic cloth, and outside uses tarpaulin, makes to form enclosure space in tarpaulin, in enclosure space
It is conserved, liquefied water, hot steam will not scatter and disappear；
2) steam pipe is distributed in brooder；
3) prepare external water source；
4) steam engine is installed:
5) pipeline installation and junction inspection: steam engine and brooder internal steam pipe pass through steam injection pipe progress piping connection, In
It after all pipelines are installed, each junction to be checked from steam engine venthole to steam (vapor) outlet, it is ensured that each junction peace
Vapour is not leaked entirely；
It is preheated before pouring: the pre-heat treatment being carried out to brooder in advance before concreting, guarantee concrete molding temperature；
Concreting: opening on brooder and pour mouth and poured, and pours and completes rear enclosed and pour mouth, wants during concreting
Pay attention to vibrating, to guarantee the quality of concrete entirety；
Be powered maintenance: after the completion of concreting, steam engine being carried out energization maintenance；
Monitoring temperature.
2. fully automatic electric hot steam generator Maintenance in Winter concrete construction method according to claim 1, feature exist
Empty longitudinal laying is put in brooder in steam pipe.
3. fully automatic electric hot steam generator Maintenance in Winter concrete construction method according to claim 1 or 2, feature
It is that external water source selection connection running water pipe is supplied, prepares water butt, in advance before maintenance to prevent tap water temporary
The insufficient supply of property, guarantees the abundance at water source.
4. fully automatic electric hot steam generator Maintenance in Winter concrete construction method according to claim 1 or 2, feature
It is that steam pipe selects the rubber tube of outsourcing asbestos yarn, is distributed steam (vapor) outlet on rubber tube.
5. fully automatic electric hot steam generator Maintenance in Winter concrete construction method according to claim 1 or 2, feature
It is that steam engine selects Full-automatic electrical heating steam generator.
6. fully automatic electric hot steam generator Maintenance in Winter concrete construction method according to claim 1 or 2, feature
It is that brooder can be removed when concrete cooling is to ambient temperature difference no more than 10 DEG C.
7. fully automatic electric hot steam generator Maintenance in Winter concrete construction method according to claim 1 or 2, feature
It is to wrap up special-purpose thermal insulation set outside steam injection pipe, special-purpose thermal insulation, which is applied, to be wrapped up in silver color to return heat fabric outside tubulose rigid foam
At.
8. fully automatic electric hot steam generator Maintenance in Winter concrete construction method according to claim 1 or 2, feature
It is that going up and down thermophase ensures temperature gradient at 10~15 degree/2~3 hours, maximum temperature is 35~40 degree, it is possible to prevente effectively from
The generation in crack.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112661533A (en) * | 2020-12-17 | 2021-04-16 | 国家电网有限公司 | Winter construction maintenance device based on thermochemical reaction |
| CN113001772A (en) * | 2021-02-22 | 2021-06-22 | 中电建十一局工程有限公司 | Winter heat preservation construction method for concrete precast beam |
| CN113084985A (en) * | 2021-04-09 | 2021-07-09 | 中铁六局集团太原铁路建设有限公司 | Full-automatic steam curing equipment and method for concrete prefabricated part |
| CN113292358A (en) * | 2021-06-29 | 2021-08-24 | 中建三局第一建设安装有限公司 | Steam curing process for assembled building wall |
| CN113463962A (en) * | 2020-03-31 | 2021-10-01 | 上海二十冶建设有限公司 | Heat preservation method for construction of cyclone pool in winter in cold area |
| CN114263466A (en) * | 2021-12-20 | 2022-04-01 | 安徽理工大学 | Method for controlling prefabricated construction temperature crack of well wall in winter in alpine region |
| CN114478063A (en) * | 2022-02-28 | 2022-05-13 | 河北工业大学 | Gradient temperature electric stimulation curing method for concrete in cold region in winter |
| CN115139397A (en) * | 2022-08-09 | 2022-10-04 | 中建三局集团有限公司 | Steam curing device for bare concrete member in winter |
| CN115450449A (en) * | 2022-10-24 | 2022-12-09 | 中石化石油工程技术服务有限公司 | Construction method of mass concrete in severe cold climate |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113463962A (en) * | 2020-03-31 | 2021-10-01 | 上海二十冶建设有限公司 | Heat preservation method for construction of cyclone pool in winter in cold area |
| CN112661533A (en) * | 2020-12-17 | 2021-04-16 | 国家电网有限公司 | Winter construction maintenance device based on thermochemical reaction |
| CN113001772A (en) * | 2021-02-22 | 2021-06-22 | 中电建十一局工程有限公司 | Winter heat preservation construction method for concrete precast beam |
| CN113084985A (en) * | 2021-04-09 | 2021-07-09 | 中铁六局集团太原铁路建设有限公司 | Full-automatic steam curing equipment and method for concrete prefabricated part |
| CN113292358A (en) * | 2021-06-29 | 2021-08-24 | 中建三局第一建设安装有限公司 | Steam curing process for assembled building wall |
| CN113292358B (en) * | 2021-06-29 | 2022-11-01 | 中建三局第一建设安装有限公司 | Steam curing process for assembled building wall |
| CN114263466A (en) * | 2021-12-20 | 2022-04-01 | 安徽理工大学 | Method for controlling prefabricated construction temperature crack of well wall in winter in alpine region |
| CN114263466B (en) * | 2021-12-20 | 2024-01-30 | 安徽理工大学 | Winter prefabrication construction temperature crack control method for well wall of well drilling in alpine region |
| CN114478063A (en) * | 2022-02-28 | 2022-05-13 | 河北工业大学 | Gradient temperature electric stimulation curing method for concrete in cold region in winter |
| CN114478063B (en) * | 2022-02-28 | 2023-02-07 | 河北工业大学 | Gradient temperature electric stimulation curing method for concrete in cold region in winter |
| CN115139397A (en) * | 2022-08-09 | 2022-10-04 | 中建三局集团有限公司 | Steam curing device for bare concrete member in winter |
| CN115450449A (en) * | 2022-10-24 | 2022-12-09 | 中石化石油工程技术服务有限公司 | Construction method of mass concrete in severe cold climate |
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Application publication date: 20191203 |