CN104695709A - Crack control method for mass concrete adopting phase-change material - Google Patents
Crack control method for mass concrete adopting phase-change material Download PDFInfo
- Publication number
- CN104695709A CN104695709A CN201510010150.5A CN201510010150A CN104695709A CN 104695709 A CN104695709 A CN 104695709A CN 201510010150 A CN201510010150 A CN 201510010150A CN 104695709 A CN104695709 A CN 104695709A
- Authority
- CN
- China
- Prior art keywords
- concrete
- exchange heat
- phase
- water
- heat exchange
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention provides a crack control method for mass concrete adopting a phase-change material, and belongs to the technical field of construction engineering. The crack control method is characterized by comprising steps as follows: step one, a heat exchange water circulation system is arranged in the construction position; step two, phase-change concrete is poured on a heat absorption assembly of the heat exchange water circulation system; step three, the concrete is poured, and the inner temperature of the concrete is controlled by the heat exchange water circulation system; the heat exchange water circulation system comprises the head absorption assembly and water storage pools, the heat absorption assembly comprises heat exchange water pipes and heat exchange metal sheets, the water storage pools comprise a cold water storage pool and a hot water storage pool, the heat exchange metal sheets are arranged on the heat exchange water pipes, one end of each heat exchange water pipe is connected with the cold water storage pool through a water inlet pipe, and the other end of each heat exchange pipe is connected with the hot water storage pool through a water outlet pipe. According to the crack control method for the mass concrete adopting the phase-change material, the structure is simple, the cost is low, the inner temperature of the concrete can be effectively controlled, and accordingly, concrete cracks are prevented.
Description
Technical field:
The invention belongs to construction engineering technical field, be specifically related to a kind of control of concrete cracks method adopting phase-change material.
Background technology:
Along with the continuous quickening of China's rapid development of economy and Process of Urbanization Construction process, building is on the increase, and wherein Tall Building Foundation and Bridge Piers, cushion cap concrete structure size are comparatively large, and mass concrete construction is more and more general.Large volume concrete structural, it has, and structure is thick, volume is large, reinforcing bar is close, concreting amount large, construction technical requirement high.One of key of large volume concrete structural construction success or failure is how to take practicable technical measures, the generation of crackle preventing.Occur in work progress that mass concrete surface cracking directly affects the seismic behavior of building and the application life of building.
During mass concrete construction, cement will send certain heat in hydration process.Internal temperature constantly rises, the maximum temperature of inside concrete generally can reach 60 ~ 65 DEG C, and large volume concrete structural thing section is general thicker, the heat accumulation that cement sends not easily scatters and disappears in works inside, and with exponentially relation growth in the concrete length of time (time).Along with the growth of the age of concrete, concrete surface and internal difference in temperature increase, and increasing of concrete intensity and modulus of elasticity, the constraint of shrinking inside concrete cooling is also just more and more large, so that produces very large tensile stress.When concrete tensile strength is not enough to resist this tensile stress, just start to occur thermal cracking.Tensile stress is larger, and it is also larger that concrete produces thermal cracking.
Therefore the thermal cracking that hydrated cementitious causes is one of the key factor affecting large volume concrete structural stability, durability, control the concrete in mass heat of hydration to heat up, reduce temperature difference between inside and outside concrete, avoid generation and the expansion of thermal cracking, to improving, the globality of concrete in mass, impermeability and durability are most important.
At present, in the research of concrete in mass internal temperature rise control technology, mainly from the optimization of the selection of material, concrete mix and start with from the working measure such as precooled aggregate, block placement, coordinate the control adopting the method for water pipe cooling cooling to realize thermal cracking.Since adopting water pipe cooling to reduce the internal temperature rise of concrete in mass from 1931 first in the U.S. recklessly Buddhist dam process of construction, this method becomes one of most important measure of control hydration heat of concrete temperature rise, is worldwide widely applied.But in water pipe cooling process, press close to the concrete temperature gradient in tube wall position very large, sizable tensile stress can being caused, particularly in concrete in mass later stage cooling procedure, the structure middle and upper part departing from base restrained area may being caused to occur serious through crack.So, in order to obtain better concrete in mass internal temperature rise control effects, effectively reducing local restriction stress, improve structure anti-cracking safety, be necessary to inquire into more efficiently, more steady, safer hydration heat of concrete temperature rise controls new technology.
Summary of the invention:
For solving prior art Problems existing, the present invention proposes a kind of temperature that can adjust control inside concrete well, and then the control of concrete cracks method of the employing phase-change material effectively preventing concrete in mass internal fissure from producing.
For achieving the above object, the present invention by the following technical solutions: a kind of control of concrete cracks method adopting phase-change material, comprises the steps:
Step one: exchange heat water circulation system is set at construction location;
Step 2: build phase change concrete on the heat-absorbing member of exchange heat water circulation system;
Step 3: concreting, and control temperature in concrete by exchange heat water circulation system;
Described exchange heat water circulation system comprises heat-absorbing member and reservoir, heat-absorbing member comprises exchange heat water pipe and exchange heat sheet metal, reservoir comprises cold water reservoir and hot water reservoir, described exchange heat sheet metal is arranged on exchange heat water pipe, one end of exchange heat water pipe connects cold water reservoir by water inlet pipe, the other end connects hot water reservoir by outlet pipe, and hot water reservoir is connected with cold water reservoir, and water inlet pipe is provided with water pump;
Described phase change concrete is made up of concrete and phase-change material, and the mass ratio of concrete and phase-change material is 5 ~ 10, the laurate-myristic acid-palmitic acid ternary eutectic of described phase-change material to be mass ratio be 3:2:1.
Described exchange heat sheet metal is connected with the reinforcing bar phase colligation of inside concrete with exchange heat water pipe.
Beneficial effect of the present invention: structure is simple, and cost is low, effectively can control the temperature of inside concrete, and then prevent concrete from producing crack.
Accompanying drawing illustrates:
Fig. 1 is the structural representation of one embodiment of the present of invention;
Fig. 2 is the enlarged partial sectional view of Fig. 1;
Wherein: 1-exchange heat water pipe, 2-water inlet pipe, 3-outlet pipe, 4-phase change concrete, 5-cold water reservoir, 6-hot water reservoir, 7-water pump, 8-cold and hot pond water-supply-pipe, 9-concrete, 10-exchange heat sheet metal, 11-reinforcing bar.
Detailed description of the invention:
Below in conjunction with drawings and Examples, the present invention is described in further details:
Adopt a control of concrete cracks method for phase-change material, comprise the steps:
Step one: exchange heat water circulation system is set at construction location, described exchange heat water circulation system comprises heat-absorbing member and reservoir, as shown in Fig. 1 ~ Fig. 2, heat-absorbing member comprises some exchange heat water pipes 1 and exchange heat sheet metal 10, exchange heat water pipe 1 is evenly arranged on construction location, each root exchange heat water pipe 1 is evenly provided with some exchange heat sheet metals 10, reservoir comprises cold water reservoir 5 and hot water reservoir 6, one end of every bar exchange heat water pipe 1 connects cold water reservoir 5 by water inlet pipe 2, the other end connects hot water reservoir 6 by outlet pipe 3, hot water reservoir 6 is connected by cold and hot pond water-supply-pipe 8 with cold water reservoir 5, after recirculated water cools in hot water reservoir 6, cold water reservoir 5 can be transported to.Water inlet pipe 2 is provided with water pump 7; Exchange heat sheet metal 10 is connected with the reinforcing bar 11 phase colligation of inside concrete with exchange heat water pipe 1.The internal water heat-transmission produced when concrete 9 solidifies is conducted by reinforcing bar 11, more contributes to phase change concrete 4 and absorbs heat, take full advantage of the heat-transfer effect of reinforcing bar 11.
Step 2: build phase change concrete 4 on the exchange heat water pipe 1 and exchange heat sheet metal 10 of exchange heat water circulation system; Described phase change concrete 4 is made up of concrete and phase-change material, and the laurate-myristic acid-palmitic acid ternary eutectic of described phase-change material to be mass ratio be 3:2:1, in phase change concrete, the mass ratio of concrete and phase-change material is 5 ~ 10.
Step 3: concreting 9, in the process of concrete 9 heat release, the inner pre-buried temperature pick up of concrete 9, detects the temperature of inside concrete, when temperature starts water pump 7 higher than when 40 DEG C, thus carries out entirety cooling to concrete 9 inside.When concrete 9 internal temperature is lower than 25 DEG C, stop water pump 7.
After concrete 9 has been built, carry out the heat and moisture preserving maintenance of concrete 9, given full play to the creep property of Cemented, lowered thermal stresses, at concrete 9 exposed surface covered with plastic film, add a cover straw bag etc.
Water inlet pipe 2, outlet pipe 3 adopt DN40-75mm thin-wall steel tube (zinc-plated inside pipe), exchange heat water pipe 1 adopts DN20-40mm thin-wall steel tube (zinc-plated inside pipe), water inlet pipe 2, outlet pipe 3 are independent all separately, and exchange heat water pipe 1, water inlet pipe 2, outlet pipe 3 are apart from the edge 100cm of concrete 9.
Exchange heat water pipe 1 and exchange heat sheet metal 10 accelerate the exchange heat speed of cold water and phase change concrete 4, effectively absorb the heat of phase change concrete 4.
Phase-change material in phase change concrete 4 is laurate-myristic acid-palmitic acid ternary eutectic, its transition temperature range is at 25 DEG C ~ 30 DEG C, in this interval, concrete 9 cured strength can significantly promote, and the water temperature under normal temperature is also lower than this phase transformation interval range, effectively derived the heat of phase change concrete 4 absorption by exchange heat water circulation system, ensure that phase transition process continues to carry out.
Claims (2)
1. adopt a control of concrete cracks method for phase-change material, it is characterized in that: comprise the steps:
Step one: exchange heat water circulation system is set at construction location;
Step 2: build phase change concrete on the heat-absorbing member of exchange heat water circulation system;
Step 3: concreting, and control temperature in concrete by exchange heat water circulation system;
Described exchange heat water circulation system comprises heat-absorbing member and reservoir, heat-absorbing member comprises exchange heat water pipe and exchange heat sheet metal, reservoir comprises cold water reservoir and hot water reservoir, described exchange heat sheet metal is arranged on exchange heat water pipe, one end of exchange heat water pipe connects cold water reservoir by water inlet pipe, the other end connects hot water reservoir by outlet pipe, and hot water reservoir is connected with cold water reservoir, and water inlet pipe is provided with water pump;
Described phase change concrete is made up of concrete and phase-change material, and the mass ratio of concrete and phase-change material is 5 ~ 10, the laurate-myristic acid-palmitic acid ternary eutectic of described phase-change material to be mass ratio be 3:2:1.
2. the control of concrete cracks method of employing phase-change material according to claim 1, is characterized in that: described exchange heat sheet metal is connected with the reinforcing bar phase colligation of inside concrete with exchange heat water pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510010150.5A CN104695709B (en) | 2015-01-09 | 2015-01-09 | Adopt the control of concrete cracks method of phase-change material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510010150.5A CN104695709B (en) | 2015-01-09 | 2015-01-09 | Adopt the control of concrete cracks method of phase-change material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104695709A true CN104695709A (en) | 2015-06-10 |
| CN104695709B CN104695709B (en) | 2016-07-27 |
Family
ID=53343220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510010150.5A Expired - Fee Related CN104695709B (en) | 2015-01-09 | 2015-01-09 | Adopt the control of concrete cracks method of phase-change material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104695709B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106904923A (en) * | 2017-03-13 | 2017-06-30 | 中建商品混凝土有限公司 | A kind of large volume eco-concrete and its construction method suitable for torrid areas |
| CN107265947A (en) * | 2017-06-29 | 2017-10-20 | 安徽理工大学 | The massive concrete and its construction technology of a kind of anti-thermal cracking |
| CN107417297A (en) * | 2017-09-13 | 2017-12-01 | 苏交科集团股份有限公司 | Mass concrete hydration heat control device and its construction method |
| CN109469063A (en) * | 2018-11-21 | 2019-03-15 | 中国电建集团成都勘测设计研究院有限公司 | Cooling water pipe device suitable for thin wall concrete |
| CN111792945A (en) * | 2020-06-03 | 2020-10-20 | 北京工业大学 | PCM material storage pipeline for reducing hydration heat temperature of mass concrete and construction method |
| CN113565117A (en) * | 2021-06-29 | 2021-10-29 | 中国化学工程重型机械化有限公司 | Winter building construction method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0431564A (en) * | 1990-05-29 | 1992-02-03 | Taisei Corp | Cooling of mass concrete |
| KR20050099936A (en) * | 2004-03-23 | 2005-10-17 | 염치선 | Hydration heat control system of mass concrete using heat pipe and hydration heat control method form construction method thereof |
| KR20060098407A (en) * | 2006-08-16 | 2006-09-18 | (주)인텔리지오 | Refrigerants circulation type cooling system for concrete dams |
| CN202039605U (en) * | 2011-04-27 | 2011-11-16 | 中建七局第三建筑有限公司 | Water cooling system for concrete |
| CN103485542A (en) * | 2013-09-25 | 2014-01-01 | 中铁大桥局股份有限公司 | System and method for measuring and controlling hydration heat in mass concrete |
| CN204059978U (en) * | 2014-08-13 | 2014-12-31 | 上海建工集团股份有限公司 | The temperature-controlled cooling system of large volume concrete structural |
-
2015
- 2015-01-09 CN CN201510010150.5A patent/CN104695709B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0431564A (en) * | 1990-05-29 | 1992-02-03 | Taisei Corp | Cooling of mass concrete |
| KR20050099936A (en) * | 2004-03-23 | 2005-10-17 | 염치선 | Hydration heat control system of mass concrete using heat pipe and hydration heat control method form construction method thereof |
| KR20060098407A (en) * | 2006-08-16 | 2006-09-18 | (주)인텔리지오 | Refrigerants circulation type cooling system for concrete dams |
| CN202039605U (en) * | 2011-04-27 | 2011-11-16 | 中建七局第三建筑有限公司 | Water cooling system for concrete |
| CN103485542A (en) * | 2013-09-25 | 2014-01-01 | 中铁大桥局股份有限公司 | System and method for measuring and controlling hydration heat in mass concrete |
| CN204059978U (en) * | 2014-08-13 | 2014-12-31 | 上海建工集团股份有限公司 | The temperature-controlled cooling system of large volume concrete structural |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106904923A (en) * | 2017-03-13 | 2017-06-30 | 中建商品混凝土有限公司 | A kind of large volume eco-concrete and its construction method suitable for torrid areas |
| CN106904923B (en) * | 2017-03-13 | 2019-07-23 | 中建商品混凝土有限公司 | A kind of large volume eco-concrete and its construction method suitable for torrid areas |
| CN107265947A (en) * | 2017-06-29 | 2017-10-20 | 安徽理工大学 | The massive concrete and its construction technology of a kind of anti-thermal cracking |
| CN107417297A (en) * | 2017-09-13 | 2017-12-01 | 苏交科集团股份有限公司 | Mass concrete hydration heat control device and its construction method |
| CN109469063A (en) * | 2018-11-21 | 2019-03-15 | 中国电建集团成都勘测设计研究院有限公司 | Cooling water pipe device suitable for thin wall concrete |
| CN109469063B (en) * | 2018-11-21 | 2023-11-07 | 中国电建集团成都勘测设计研究院有限公司 | Cooling water pipe device suitable for thin-wall concrete |
| CN111792945A (en) * | 2020-06-03 | 2020-10-20 | 北京工业大学 | PCM material storage pipeline for reducing hydration heat temperature of mass concrete and construction method |
| CN113565117A (en) * | 2021-06-29 | 2021-10-29 | 中国化学工程重型机械化有限公司 | Winter building construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104695709B (en) | 2016-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104695709A (en) | Crack control method for mass concrete adopting phase-change material | |
| CN105418006B (en) | A kind of thermograde controls Massive Bridge Concrete | |
| CN105260531B (en) | A kind of calculation method of circular cross section lining concrete construction time inside maximum temperature | |
| CN105133615A (en) | Circulating cooling water temperature-control construction method for mass concrete in large temperature difference environments of Qinghai-Tibet plateau areas | |
| CN104018673A (en) | Extra-huge-volume concrete one-time continuous pouring multi-cycle real-time temperature control construction technology | |
| CN101914992A (en) | Water cooling temperature control method of mass concrete of blast furnace foundation | |
| CN101994392A (en) | Large-volume concrete fast pouring and temperature control method | |
| CN101638940A (en) | Large plate mass concrete seamless construction method | |
| CN103669356B (en) | Large volume normal concrete thick layer casting method | |
| CN111411628B (en) | Medium-heat lining concrete water cooling method based on maximum inner surface temperature difference age | |
| CN102011492B (en) | Method for controlling occurrence of cracks on mass concrete structure | |
| CN206840852U (en) | Phase-change accumulation energy composite heat supply wallboard | |
| CN109322386A (en) | Assembly concrete beam column dry type connector | |
| CN107663863A (en) | A kind of Permafrost Area pile foundation and its construction technology | |
| CN104032713B (en) | A kind of pressure diversion tunnel composite lining concrete anti-seepage structure and construction technology thereof | |
| CN108425685A (en) | A kind of Concrete Crack Control method based on cast-in-place tunnel | |
| CN219034104U (en) | Control device for crack of steel plate concrete shear wall | |
| CN202194074U (en) | Pier body heat-insulating template | |
| CN102359200B (en) | Construction method of inorganic heat-insulating wall body | |
| CN104453236B (en) | Circulating water natural cooling system for controlling large-volume concrete cracks and construction method | |
| CN216196782U (en) | Single-layer multi-loop water cooling system for super-thick large-volume concrete | |
| CN113191043B (en) | Hydraulic tunnel lining concrete temperature crack control strong constraint method and temperature control system | |
| CN116180746A (en) | Large-volume concrete construction process capable of effectively preventing concrete from shrinking in temperature | |
| WO2021134844A1 (en) | Solar radiation-shielding concrete box girder structure, and bridge box girder | |
| CN209369026U (en) | Assembly concrete beam column dry type connector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160727 Termination date: 20170109 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |