CN108868143A - Concrete construction method for extreme cold area in low temperature season - Google Patents
Concrete construction method for extreme cold area in low temperature season Download PDFInfo
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- CN108868143A CN108868143A CN201810803948.9A CN201810803948A CN108868143A CN 108868143 A CN108868143 A CN 108868143A CN 201810803948 A CN201810803948 A CN 201810803948A CN 108868143 A CN108868143 A CN 108868143A
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- concrete
- heating
- heating rod
- temperature
- low temperature
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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
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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- Engineering & Computer Science (AREA)
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- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a kind of concrete construction method for extreme cold area in low temperature season, it is related to technical field of concrete construction, it is heated by special electrothermal template in concreting, heating copper wire is evenly distributed in the electrothermal template, temperature sensor and heating rod is arranged towards the side of concrete in template in the electrothermal template, the heating copper wire is wrapped on heating rod, thermal conductive shell is provided with outside the heating rod, the heating rod is inserted vertically into concrete, is heated to concrete；The density of setting of the temperature sensor is every 1~2m2One, the density of setting of the heating rod is every 0.04~0.1m2One；On the inside of the electrothermal template and thermal conductive shell surface is painted with underwater paint.The problem of being able to solve extreme cold area in low temperature season concrete construction improves the construction efficiency of concrete works.
Description
Technical field
The present invention relates to technical field of concrete construction, in particular to a kind of extreme cold area in low temperature season concrete construction
Method.
Background technique
Cement aquation weakens under low temperature condition, and concrete hardening is very slow, to influence concrete strength.If temperature
4 DEG C are dropped to hereinafter, water needed for hydrated cementitious starts to expand, for the fragile cement granules structure newly formed, it is possible to create
Permanent damage.If concrete temperature drop to it is below freezing, since the water that freezes cannot be with cement chemical combination, concrete internalization
It learns new compound caused by reaction to be just greatly reduced, will cause the loss of concrete strength and durability.If concrete structure
The temperature difference of part itself is very big, there is also thermal cracking.It constructs in extremely frigid zones, especially low temperature season is constructed, these problems
It if not obtaining adequate solution, can not only affect adversely the duration, wasting manpower and material resources, and will cause serious quality accident.
Summary of the invention
The purpose of the present invention is to provide a kind of concrete construction method for extreme cold area in low temperature season, are able to solve high and coldly
The problem of low temp area season concrete construction, improve the construction efficiency of concrete works.
Above-mentioned purpose of the invention technical scheme is that：
A kind of concrete construction method for extreme cold area in low temperature season is added by special electrothermal template in concreting
Temperature, heating copper wire is evenly distributed in the electrothermal template, and temperature is arranged towards the side of concrete in template in the electrothermal template
Degree sensor and heating rod, the heating copper wire are wrapped on heating rod, and thermal conductive shell is provided with outside the heating rod, described
Heating rod is inserted vertically into concrete, is heated to concrete；The setting frequency of the temperature sensor is every 1~2m2
One, the setting frequency of the heating rod is every 0.04~0.1m2One；On the inside of the electrothermal template and thermal conductive shell surface is equal
It is painted with underwater paint.
By using above-mentioned technical proposal, concrete is heated by electrothermal template, when concrete temperature is too low,
The critical value for reaching temperature inductor induction heats the power supply connection of copper wire, and heating copper wire starts to warm up, and to electrothermal template and adds
Hot pin is heated, and electrothermal template improves the temperature of concrete surface, and heating rod improves the temperature of inside concrete, reduces coagulation
The internal-external temperature difference of soil, enables concrete quick-hardening, avoids the occurrence of thermal cracking, improve the intensity of concrete；Heating rod is adopted
With reasonable distribution density, inside concrete can more fully be heated, guarantee that internal-external temperature difference is smaller.
Preferably, the end of the thermal conductive shell is removably connected with thermally conductive sheet, the thermally conductive sheet is with heating rod
It is inserted into concrete, concrete is heated.
By using above-mentioned technical proposal, thermally conductive sheet is set in thermal conductive shell end, increases and connect with concrete inner layer
Contacting surface product, increases the heat exchange area of heating rod, make heating rod to the heating of concrete inner layer more evenly, heating effect is into one
Step is promoted.
Preferably, the thermal conductive shell end is provided with ring ladder, the thermally conductive sheet is circumferentially fixed in a round set
On cylinder, the circular sleeve is set on thermal conductive shell and is against on ring ladder.
By using above-mentioned technical proposal, facilitate and heating sheet is mounted on thermal conductive shell, while the disassembly of thermally conductive sheet
It is more convenient.
Preferably, the test frequency when concreting starts of the temperature sensor on the inside of the electrothermal template is 1h survey
It tries once, test frequency is that 2h test is primary after 2h, and rear test frequency is primary for 4h test for 24 hours.
The test frequency to concrete temperature is reduced with the gradually hardening of concrete by using above-mentioned technical proposal,
The energy can either be saved, unnecessary energy loss is reduced, while can also guarantee good concrete pouring quality.
Preferably, for different labels concrete, using different heating rates；For the concrete of C40, heating speed
Degree is 13 DEG C/h；For the concrete of C35, heating rate is 12 DEG C/h；For the concrete of C30, heating rate is 11 DEG C/h；
For the concrete of C25, heating rate is 10 DEG C/h, and for the concrete of C20, heating rate is 9 DEG C/h, for the mixed of C15
Solidifying soil, heating rate are 8 DEG C/h.
By using above-mentioned technical proposal, different marks are guaranteed using different heating rates for different labels concrete
Number concrete can have good hardening effect at low ambient temperatures.
Preferably, temperature of concrete during construction must not exceed 28 DEG C when concrete uses portland cement；Work as concrete
When using slag cements, temperature of concrete during construction must not exceed 30 DEG C；When concrete uses pozzolan cement, concreting
Temperature must not exceed 32 DEG C；When concrete uses pulverized fuel ash cement, temperature of concrete during construction must not exceed 34 DEG C.
By using above-mentioned technical proposal, the temperature of concrete during construction of unlike material is unsuitable excessively high, if temperature is excessively high, holds
Easily cause moisture evaporation excessive, concrete temperature is lower, can reduce moisture evaporation, be conducive to the hydration reaction of cement, improve
The pouring quality of concrete.
Preferably, for different labels concrete, using different maintenance processes；For the concrete of C40, maintenance temperature
Degree is 7~8 DEG C/h；For the concrete of C35, curing temperature is 8~9 DEG C；For the concrete of C30, curing temperature is 9~10
℃；For the concrete of C25, curing temperature is 10~11 DEG C；Concrete below for C20 and C20, curing temperature 11
~12 DEG C.
By using above-mentioned technical proposal, the concrete of different labels uses different curing temperatures, and curing temperature is reasonable,
Too high excessive water will not be caused to evaporate, too low concrete will not be caused to freeze, ensure that the pouring quality of concrete.
Preferably, the heating rod takes out from concrete, and the thermally conductive sheet stays in mixed when the electrothermal template is removed
In solidifying soil, the hole casting concrete that leaves to concrete in heating rod is simultaneously smoothed out.
By using above-mentioned technical proposal, thermally conductive sheet will not be removed with heating rod, be avoided to around heating rod
Concrete damages, and then the hole that heating rod leaves is poured and smoothed out using concrete, ensure that concrete structure
Surfacing.
In conclusion the invention has the advantages that：
1, the present invention in casting concrete, by heat copper wire concrete is heated, make concrete be able to maintain compared with
High temperature avoids the water in concrete from freezing under conditions of low temperature, guarantees that concrete can be hardened normally, improves
The pouring quality of concrete, ensure that the intensity and durability of concrete construction under extremely frigid zones low temperature environment.
2, the present invention is in curing concrete, while to concrete surface layer and being internally heated, and reduces internal-external temperature difference, makes
Concrete can quick-hardening, avoid the occurrence of thermal cracking, improve the intensity and durability of concrete.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of electric heating diaphragm plate of the present invention.
In figure, 1, electric heating diaphragm plate；2, copper wire is heated；3, temperature sensor；4, heating rod；5, thermal conductive shell；51, annular step
Ladder；6, thermally conductive sheet；61, circular sleeve.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
In the description of the invention, it is to be understood that term " center ", "upper", "lower", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown is merely for convenience of description the invention and simplifies description, rather than indication or suggestion is signified
Device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the present invention
Limitation.
A kind of concrete construction method for extreme cold area in low temperature season, through special electrothermal template 1 in concreting
It is heated, as shown in Fig. 1, which includes two sides plate body, and centre is provided with interlayer, is evenly distributed in interlayer
Copper wire 2 is heated, heating copper wire 2 is mounted on electrothermal template 1 on the plate body of the side of concrete, and surface layer is provided with terephthaldehyde
Sour glycol ester insulating film.Heating copper wire 2 is connected to power supply by earth leakage protective device, passes through heating copper wire 2 when concreting
Concrete surface layer heat temperature raising is given, the electric current heated in copper wire 2 is less than 350A.
Electrothermal template 1 is provided with temperature sensor 3 and heating rod 4 in the side of template towards concrete, and heating copper wire 2 is worn
The plate body for crossing electrothermal template 1 is wrapped on heating rod 4.The density of setting of heating rod 4 is every 0.04~0.1m2One, uniformly divide
For cloth on side of the electrothermal template 1 towards concrete, for density of setting depending on environment temperature, environment temperature is lower, then heats
The density of stick 4 is bigger.Temperature sensor 3 is arranged at intervals between heating rod 4, and density of setting is every 1~2m2One, pass through
Temperature sensor 3 can grasp the state of temperature of concrete, to adjust the electrical current of heating copper wire 2；Temperature sensor 3 exists
When concreting starts, test frequency is that 1h is tested once, and test frequency is that 2h test is primary after 2h, for 24 hours rear test frequency
It is primary for 4h test.
Heating rod 4 is highly 10-15cm perpendicular to 1 surface of electrothermal template, and electrothermal template 1 is fitted in concrete surface, adds
Hot pin 4 is inserted into concrete, is heated to inside concrete.Columnar thermal conductive shell 5 is provided with outside heating rod 4,
Heating copper wire 2 in heating rod 4 is fitted on thermal conductive shell 5, and heat is transmitted in concrete by thermal conductive shell 5.It is thermally conductive
Shell 5 deviates from an end closure of electrothermal template 1, and the other end is fixed on electrothermal template 1, is inserted into coagulation with heating rod 4
In soil, 1 inside of electrothermal template and 5 surface of thermal conductive shell are painted with underwater paint, prevent from burning out heating copper wire 2 into water.
5 end of thermal conductive shell is removably connected with thermally conductive sheet 6, and thermally conductive sheet 6 is inserted into concrete with heating rod 4,
Increase the heating area to concrete.Specifically, 5 end of thermal conductive shell is provided with the ring ladder 51 of circle circumferential direction, four squares
For the thermally conductive sheet 6 of shape in circumferentially fixed on a circular sleeve 61, circular sleeve 61 is set in the end of thermal conductive shell 5 and and ring
Shape ladder 51 contradicts connection, and the outer diameter of circular sleeve 61 is identical as the diameter of thermal conductive shell 5.
For different labels concrete, using different heating rates；For the concrete of C40, heating rate is 13 DEG C/
h；For the concrete of C35, heating rate is 12 DEG C/h；For the concrete of C30, heating rate is 11 DEG C/h；For C25's
Concrete, heating rate are 10 DEG C/h, and for the concrete of C20, heating rate is 9 DEG C/h, for the concrete of C15, heating
Speed is 8 DEG C/h.For different labels concrete, using different maintenance processes；For the concrete of C40, curing temperature 7
~8 DEG C/h；For the concrete of C35, curing temperature is 8~9 DEG C；For the concrete of C30, curing temperature is 9~10 DEG C；It is right
In the concrete of C25, curing temperature is 10~11 DEG C；Concrete below for C20 and C20, curing temperature are 11~12
℃。
When concrete uses portland cement, temperature of concrete during construction must not exceed 28 DEG C；When concrete uses slag
When cement, temperature of concrete during construction must not exceed 30 DEG C；When concrete uses pozzolan cement, temperature of concrete during construction must not
More than 32 DEG C；When concrete uses pulverized fuel ash cement, temperature of concrete during construction must not exceed 34 DEG C.
The intensity of certain engineering beams of concrete is C25, is highly 80cm, width 40cm, length 12m, extraneous when construction
Mean temperature is -1 DEG C.For the single plate body of electrothermal template 1 with a thickness of 5mm, heating brass wire diameter is 2mm, temperature sensor 3 every
1.2m is arranged one, and heating rod 4 is arranged one every 25cm.For the concrete of C25, heating rate is 10 DEG C/h, maintenance temperature
Degree is 10~11 DEG C, avoids heating up too fast, causes concrete season cracking,
This specific embodiment is only explanation of the invention, is not limitation of the present invention, and those skilled in the art exist
It can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as in the present invention
Scope of the claims in all by the protection of Patent Law.
Claims (8)
1. a kind of concrete construction method for extreme cold area in low temperature season, it is characterised in that：Pass through special electrothermal template（1）Mixed
Solidifying soil is heated when pouring, the electrothermal template（1）Inside it is evenly distributed with heating copper wire（2）, the electrothermal template（1）In mould
Temperature sensor is arranged towards the side of concrete in plate（3）And heating rod（4）, the heating copper wire（2）It is wrapped in heating rod（4）
On, the heating rod（4）Outside is provided with thermal conductive shell（5）, the heating rod（4）It is inserted vertically into concrete, to coagulation
Soil is heated；The temperature sensor（3）Density of setting be every 1~2m2One, the heating rod（4）Density of setting
For every 0.04~0.1m2One；The electrothermal template（1）Inside and thermal conductive shell（5）Surface is painted with underwater paint.
2. concrete construction method for extreme cold area in low temperature season according to claim 1, it is characterised in that：It is described thermally conductive outer
Shell（5）End be removably connected with thermally conductive sheet（6）, the thermally conductive sheet（6）With heating rod（4）It is inserted into concrete together,
Concrete is heated.
3. concrete construction method for extreme cold area in low temperature season according to claim 2, it is characterised in that：It is described thermally conductive outer
Shell（5）End is provided with ring ladder（51）, the thermally conductive sheet（6）It is circumferentially fixed in a circular sleeve（61）On, the circle
Sleeve（61）It is set in thermal conductive shell（5）It goes up and is against ring ladder（51）On.
4. concrete construction method for extreme cold area in low temperature season according to claim 1-3, it is characterised in that：Institute
State electrothermal template（1）The temperature sensor of inside（3）When concreting starts, test frequency is that 1h test is primary, is surveyed after 2h
Trying frequency is that 2h test is primary, and rear test frequency is that 4h test is primary for 24 hours.
5. concrete construction method for extreme cold area in low temperature season according to claim 1-3, it is characterised in that：It is right
In different labels concrete, using different heating rates；For the concrete of C40, heating rate is 13 DEG C/h；For C35
Concrete, heating rate be 12 DEG C/h；For the concrete of C30, heating rate is 11 DEG C/h；For the concrete of C25, rise
Warm speed is 10 DEG C/h, and for the concrete of C20, heating rate is 9 DEG C/h, for the concrete of C15, heating rate is 8 DEG C/
h。
6. concrete construction method for extreme cold area in low temperature season according to claim 1-3, it is characterised in that：When
When concrete uses portland cement, temperature of concrete during construction must not exceed 28 DEG C；When concrete uses slag cements, coagulation
Native placing temperature must not exceed 30 DEG C；When concrete uses pozzolan cement, temperature of concrete during construction must not exceed 32 DEG C；When
When concrete uses pulverized fuel ash cement, temperature of concrete during construction must not exceed 34 DEG C.
7. concrete construction method for extreme cold area in low temperature season according to claim 1-3, it is characterised in that：It is right
In different labels concrete, using different maintenance processes；For the concrete of C40, curing temperature is 7~8 DEG C/h；For
The concrete of C35, curing temperature are 8~9 DEG C；For the concrete of C30, curing temperature is 9~10 DEG C；For the coagulation of C25
Soil, curing temperature are 10~11 DEG C；Concrete below for C20 and C20, curing temperature are 11~12 DEG C.
8. according to the described in any item concrete construction method for extreme cold area in low temperature season of Claims 2 or 3, it is characterised in that：
The electrothermal template（1）When dismounting, the heating rod（4）It is taken out from concrete, the thermally conductive sheet（6）It stays in concrete,
To concrete in heating rod（4）The hole casting concrete that leaves simultaneously smoothes out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810803948.9A CN108868143B (en) | 2018-07-20 | 2018-07-20 | Concrete construction method in cold region in low-temperature season |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810803948.9A CN108868143B (en) | 2018-07-20 | 2018-07-20 | Concrete construction method in cold region in low-temperature season |
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| CN108868143B CN108868143B (en) | 2020-11-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112497453A (en) * | 2019-09-16 | 2021-03-16 | 中国京冶工程技术有限公司 | Non-corrosive liquid heat-conducting medium for cement electric heating composite template and heat preservation control device |
| CN115097875A (en) * | 2022-05-20 | 2022-09-23 | 湖南科技大学 | Carbon fiber electric heating-based concrete structure prestressed pipeline temperature control system and control method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030013088A (en) * | 2001-08-07 | 2003-02-14 | 주식회사유신코퍼레이션 | Method for reducing heat of hydration generated from mass concrete |
| CN101798871A (en) * | 2010-01-25 | 2010-08-11 | 朱奎 | Method for constructing concrete in frost region |
| WO2013085116A1 (en) * | 2011-12-07 | 2013-06-13 | 한국철도기술연구원 | Heating form heated by microwaves and construction method of concrete structure |
| CN103790247A (en) * | 2013-12-30 | 2014-05-14 | 吴方伯 | Cast-in-situ heat preservation beam or column or shear wall and construction method |
| CN204166414U (en) * | 2014-11-10 | 2015-02-18 | 陈绪褚 | Intelligent temperature control concrete heated die plate constructing device |
| CN107327137A (en) * | 2017-09-02 | 2017-11-07 | 青岛科瑞新型环保材料集团有限公司 | A kind of heat insulation integrated non-dismantling formworks of STP and its construction technology |
-
2018
- 2018-07-20 CN CN201810803948.9A patent/CN108868143B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030013088A (en) * | 2001-08-07 | 2003-02-14 | 주식회사유신코퍼레이션 | Method for reducing heat of hydration generated from mass concrete |
| CN101798871A (en) * | 2010-01-25 | 2010-08-11 | 朱奎 | Method for constructing concrete in frost region |
| WO2013085116A1 (en) * | 2011-12-07 | 2013-06-13 | 한국철도기술연구원 | Heating form heated by microwaves and construction method of concrete structure |
| CN103790247A (en) * | 2013-12-30 | 2014-05-14 | 吴方伯 | Cast-in-situ heat preservation beam or column or shear wall and construction method |
| CN204166414U (en) * | 2014-11-10 | 2015-02-18 | 陈绪褚 | Intelligent temperature control concrete heated die plate constructing device |
| CN107327137A (en) * | 2017-09-02 | 2017-11-07 | 青岛科瑞新型环保材料集团有限公司 | A kind of heat insulation integrated non-dismantling formworks of STP and its construction technology |
Non-Patent Citations (1)
| Title |
|---|
| 北京土木建筑学会: "混凝土结构表面出现裂缝", 《建筑工程质量常见问题防治手册 建筑与节能工程》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112497453A (en) * | 2019-09-16 | 2021-03-16 | 中国京冶工程技术有限公司 | Non-corrosive liquid heat-conducting medium for cement electric heating composite template and heat preservation control device |
| CN115097875A (en) * | 2022-05-20 | 2022-09-23 | 湖南科技大学 | Carbon fiber electric heating-based concrete structure prestressed pipeline temperature control system and control method |
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| CN108868143B (en) | 2020-11-27 |
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