CN106003396A - Steaming-free production technology for PHC pipe pile and application of steaming-free production technology - Google Patents
Steaming-free production technology for PHC pipe pile and application of steaming-free production technology Download PDFInfo
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- CN106003396A CN106003396A CN201610367851.9A CN201610367851A CN106003396A CN 106003396 A CN106003396 A CN 106003396A CN 201610367851 A CN201610367851 A CN 201610367851A CN 106003396 A CN106003396 A CN 106003396A
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- curing
- pile tube
- ambient temperature
- curing time
- demoulding
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 46
- 238000005516 engineering process Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 40
- 238000009413 insulation Methods 0.000 claims abstract description 9
- 238000001704 evaporation Methods 0.000 claims description 27
- 230000008569 process Effects 0.000 claims description 24
- 238000012423 maintenance Methods 0.000 claims description 22
- 230000036541 health Effects 0.000 claims description 12
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 230000015271 coagulation Effects 0.000 claims description 4
- 238000005345 coagulation Methods 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 2
- 238000001723 curing Methods 0.000 abstract 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000004568 cement Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 230000008859 change Effects 0.000 description 6
- 239000003638 chemical reducing agent Substances 0.000 description 6
- 239000004576 sand Substances 0.000 description 6
- 239000002893 slag Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000004927 clay Substances 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- 239000004005 microsphere Substances 0.000 description 3
- 238000010025 steaming Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 2
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- INHCSSUBVCNVSK-UHFFFAOYSA-L lithium sulfate Inorganic materials [Li+].[Li+].[O-]S([O-])(=O)=O INHCSSUBVCNVSK-UHFFFAOYSA-L 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- RBTVSNLYYIMMKS-UHFFFAOYSA-N tert-butyl 3-aminoazetidine-1-carboxylate;hydrochloride Chemical compound Cl.CC(C)(C)OC(=O)N1CC(N)C1 RBTVSNLYYIMMKS-UHFFFAOYSA-N 0.000 description 2
- -1 Triethanolamine Lithium sulfate Chemical compound 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention belongs to the building technology, relates to a steaming-free production technology for a PHC pipe pile and application of the steaming-free production technology and provides a steaming-free curing method for the pipe pile. The method includes the following steps that firstly, the pipe pile is subjected to insulation curing before demolding; and secondly, the pipe pile obtained after insulation curing in the step (1) is demolded and is subjected to natural curing after being demolded. The invention further provides the application of the above method in the production technology for the PHC pipe pile and the steaming-free production technology for the PHC pipe pile. By means of the steaming-free production technology for the PHC pipe pile and the application of the production technology, the steam curing link is omitted in the pile manufacturing process, the manufacturing difficulty and cost of the pipe pile are lowered, energy is saved, environment friendliness is facilitated, the performance of the manufactured PHC pipe pile meets various requirements of the standard, and very wide application prospects are achieved.
Description
Technical field
The invention belongs to Building technology, relate to non-evaporating health preserving production. art and the application thereof of a kind of PHC pile tube.
Background technology
Along with the high speed development of the every engineering construction of China, PHC pile tube because having good mechanical property and cost performance and
Extensively application is obtained in the pile foundation engineering of the engineerings such as industry and civil buildings, port and pier, water conservancy, railway, bridge.Statistics money
Material shows, the demand of PHC pile tube increases year by year, and domestic large-scale pile tube enterprise in 2011 production and marketing is more than 300,000,000 yuan of linear meter(lin.m.)s, annual value of production
Breaching 30,000,000,000 yuan, the output value of pile tube has accounted for more than the 50% of the national cement goods industry output value.
The production technology of tradition PHC pile tube need to use steam curing and high-pressure steaming and cultivating to carry out secondary steam curing process.High pressure steams
Supporting need to be under conditions of steam pressure 0.95～1.0MPa and temperature 170～180 DEG C, steam press maintenance 3～5 hours.For overcoming biography
The substantial amounts of energy resource consumption of system PHC pile tube secondary high-pressure steam curing process generation and high-pressure steaming and cultivating are to PHC tubular pile concrete performance
Impact, in recent years, develop and use exempt from pressure steam production technology carry out PHC pile tube production.But, high-pressure steaming and cultivating is steamed with exempting from pressure
Technique is required to steam curing, need to consume mass energy, and have a negative impact pile tube performance, it is therefore desirable to research and develop non-evaporating vapour
Maintaining process technology carries out PHC pile tube production.But employing is exempted from steam curing and the strongest intensity of concrete can be caused to decline, and need to develop and exempt from
Steam-cured PHC pile tube production new technique, takes the effective technology measures such as curing pool insulated curing, gives full play to hydration heat of cement and supports
Protect the insulation effect in pond, improve concrete early curing temperature, be effectively improved early age strength of concrete, thus ensure that concrete takes off
Mould time and template turnover.Therefore, develop new non-evaporating foster PHC pile tube manufacturing technique method to be of great significance.
Summary of the invention
The shortcoming of prior art in view of the above, it is an object of the invention to provide the non-evaporating health preserving of a kind of PHC pile tube
Production. art and application thereof, be used for overcoming existing pressure of exempting to steam technical problem present in production technology.
For achieving the above object and other relevant purposes, first aspect present invention provides the non-evaporating foster maintenance side of a kind of pile tube
Method, comprises the following steps:
1) by pile tube before the demoulding, insulated curing is carried out；
2) will be through step 1) in tubular pile demoulding after insulated curing, after demoulding, carry out natural curing.
Preferably, described pile tube is PHC pile tube.
Preferably, step 1) in, described insulated curing is carried out in curing in airtight condition pond.
Preferably, step 1) in, the temperature of described insulated curing, right according between insulated curing time and ambient temperature
Should be related to, calculate by public formula I, (II), (III):
Described public formula I is: y1=9.73+0.99x；
Described public formula II is: y2=12.92+0.92x；
Described public formula III is: y3=14.82+0.89x；
In formula: x is average ambient temperature；Y1 is mean temperature in 12 hours curing pools；Y2 is flat in 24 hours curing pools
All temperature；Y3 is mean temperature in 48 hours curing pools.
It is highly preferred that the corresponding relation between described insulated curing time and ambient temperature is as shown in table 1, for:
When average ambient temperature (x) is 3 DEG C≤x≤15 DEG C, the insulated curing time is 48 hours；
When average ambient temperature (x) is 15 DEG C of ＜ x≤25 DEG C, the insulated curing time is 24 hours；
When average ambient temperature (x) is 25 DEG C of ＜ x≤40 DEG C, the insulated curing time is 12 hours.
The insulated curing time at a temperature of table 1 varying environment
| Average ambient temperature (DEG C) | The insulated curing time (hour) |
| 3～15 | 48 |
| 15～25 | 24 |
| 25～40 | 12 |
Preferably, step 1) in, the curing time in described insulated curing is 12-48h.
Described insulated curing determines temperature and the relation of ambient temperature in curing pool by test, can become according to ambient temperature
Change, determine suitable curing pool curing time and temperature.Described insulated curing is at the insulation of curing pool confined space and pile tube coagulation
Under soil-cement hydration heat effect, in making curing pool, constant temperature increases, and improves concrete demoulding intensity.
Preferably, step 1) in, described insulated curing does not include steam curing.
Preferably, step 2) in, the temperature of described natural curing is ambient temperature.
Preferably, step 2) in, the time of described natural curing is 1-20 days.
The natural curing time of table 2 varying environment temperature
| Average ambient temperature (DEG C) | The natural curing time (my god) |
| 3～5 | 10-20 |
| 5～10 | 6-12 |
| 10～15 | 3-6 |
| 15～25 | 3-5 |
| 25～40 | 1-2 |
Preferably, step 2) in, the corresponding relation between described natural curing time and ambient temperature is as shown in table 2, for:
When average ambient temperature (x) is 3 DEG C≤x≤5 DEG C, the natural curing time is 10～20 days；
When average ambient temperature (x) is 5 DEG C of ＜ x≤10 DEG C, the natural curing time is 6～12 days；
When average ambient temperature (x) is 10 DEG C of ＜ x≤15 DEG C, the natural curing time is 3～6 days；
When average ambient temperature (x) is 15 DEG C of ＜ x≤25 DEG C, the natural curing time is 3～5 days；
When average ambient temperature (x) is 25 DEG C of ＜ x≤40 DEG C, the natural curing time is 1～2 day.
Described natural curing is according to variation of ambient temperature, and curing time is different, when temperature is relatively low, and the natural curing time
Relatively increase.
Preferably, step 2) in, described natural curing does not include steam curing.
Preferably, step 1) or 2) in, the described demoulding is demoulding Shi Hanzhang technique conventional in pile tube production technology.
The described demoulding is to be spun off from mould by concrete tubular pile.
Second aspect present invention provides above-mentioned maintenance process application in the production technology of PHC pile tube.
Third aspect present invention provides the non-evaporating health preserving production. art of a kind of PHC pile tube, successively through concrete batching, concrete
Stirring, fabrication of reinforcing cage, concrete distributing, prestressed stretch-draw, centrifugal forming, demoulding maintenance processes, thus prepare required
PHC pile tube, wherein, described demoulding maintenance processes, comprise the following steps:
A) by PHC pile tube before the demoulding, insulated curing is carried out；
B) will be through step A) in PHC tubular pile demoulding after insulated curing, after demoulding, carry out natural curing.
Preferably, described concrete is conventional use of concrete, commercially available acquisition.
Preferably, in the non-evaporating health preserving production. art of described PHC pile tube, described concrete batching, concrete-agitating, steel reinforcement cage
Making, concrete distributing, prestressed stretch-draw, centrifugal forming, be the common process in PHC pile tube production technology.It is specifically shown in figure
1。
Preferably, described concrete batching is by each for concrete component material, weighs by match ratio electronic scale, by not
After being transported to blender with approach, it is stirred.
It is highly preferred that described match ratio, by every cubic metre of kilogram number (kg/m added3) meter, including following components:
Cement 400～500；
Admixture 60～110；
Fine aggregate 700～800；
Coarse aggregate 1100～1200；
Mixing water 120～140；
Additive 3～11.
It is further preferred that described cement is II type portland cement.The strength grade of described cement is 52.5.
It is further preferred that described admixture, by every cubic metre of kilogram number (kg/m added3) meter, including following components:
Slag powders 40～60；
Fly ash micro-sphere 20～50.
Most preferably, described slag powders is ground granulated blast furnace slag.The strength grade of described slag powders is S115.
Most preferably, the water demand ratio of described fly ash micro-sphere is 70～90wt%, and 7 days activity indexs are 80-90%.
It is further preferred that described fine aggregate is sand.The performance indications of described sand are: modulus of fineness is in 2.3～3.0
Sand, clay content is 0.2～1.5wt%, clod content 0.1～0.5wt%.
It is further preferred that described coarse aggregate is rubble.The performance indications of described rubble are: 5～25mm continuous gradings
Rubble (formulated by 5～10mm and 16～25 liang of gratings, the mass ratio of 5～10mm and 16～25mm is 2～4:6～8), contains
Mud amount is 0.2～1wt%, and clod content is 0.05-0.2wt%.
It is further preferred that described mixing water is tap water.
It is further preferred that described additive, by every cubic metre of kilogram number (kg/m added3) meter, including following components:
Water reducer 3～7；
Early strength agent 0～4.
Most preferably, described water reducer is high performance water reducing agent of polyocarboxy acid.
Most preferably, one or both in lithium sulfate or triethanolamine of described early strength agent.
Preferably, described concrete-agitating is to be stirred by each for concrete component employing forced concrete mixer.
Preferably, after described fabrication of reinforcing cage refers to make steel reinforcement cage and pile crown respectively, carry out being assembled into PHC pile tube shape
Band pile crown steel reinforcement cage, puts into mould.
Preferably, described concrete distributing is the band pile crown steel reinforcement cage that concrete is poured into PHC pile tube shape in mould.
Preferably, described prestressed stretch-draw is in advance deformed bar to be applied pulling force in component so that in advance should apply
Power acts on punching block, and then after the demoulding, PHC tubular pile concrete is applied stress, improves the bending resistance of component, rigidity and resists
Fragility, increases the durability of component.
Preferably, described centrifugal forming is to use centrifuge to be centrifuged by the PHC tubular pile concrete after prestressed stretch-draw
Molding.
Preferably, step A) in, described insulated curing is carried out in curing in airtight condition pond.
Preferably, step A) in, the temperature of described insulated curing, right according between insulated curing time and ambient temperature
Should be related to, calculate by public formula I, (II), (III):
Described public formula I is: y1=9.73+0.99x；
Described public formula II is: y2=12.92+0.92x；
Described public formula III is: y3=14.82+0.89x；
In formula: x is average ambient temperature；Y1 is mean temperature in 12 hours curing pools；Y2 is flat in 24 hours curing pools
All temperature；Y3 is mean temperature in 48 hours curing pools.
It is highly preferred that the corresponding relation between described insulated curing time and ambient temperature is:
When average ambient temperature (x) is 3 DEG C≤x≤15 DEG C, the insulated curing time is 48 hours；
When average ambient temperature (x) is 15 DEG C of ＜ x≤25 DEG C, the insulated curing time is 24 hours；
When average ambient temperature (x) is 25 DEG C of ＜ x≤40 DEG C, the insulated curing time is 12 hours.
Preferably, step A) in, the curing time in described insulated curing is 12-48h.
Described insulated curing determines temperature and the relation of ambient temperature in curing pool by test, can become according to ambient temperature
Change, determine suitable curing pool curing time and temperature.Described insulated curing is at the insulation of curing pool confined space and pile tube coagulation
Under soil-cement hydration heat effect, in making curing pool, constant temperature increases, and improves concrete demoulding intensity.
Preferably, step A) in, described insulated curing does not include steam curing.
Preferably, step B) in, the temperature of described natural curing is ambient temperature.
Preferably, step B) in, the time of described natural curing is 1-20 days.
Preferably, step B) in, the corresponding relation between described natural curing time and ambient temperature is:
When average ambient temperature (x) is 3 DEG C≤x≤5 DEG C, the natural curing time is 10～20 days；
When average ambient temperature (x) is 5 DEG C of ＜ x≤10 DEG C, the natural curing time is 6～12 days；
When average ambient temperature (x) is 10 DEG C of ＜ x≤15 DEG C, the natural curing time is 3～6 days；
When average ambient temperature (x) is 15 DEG C of ＜ x≤25 DEG C, the natural curing time is 3～5 days；
When average ambient temperature (x) is 25 DEG C of ＜ x≤40 DEG C, the natural curing time is 1～2 day.
Described natural curing is according to variation of ambient temperature, and curing time is different, when temperature is relatively low, and the natural curing time
Relatively increase.
Preferably, step B) in, described natural curing does not include steam curing.
As it has been described above, the non-evaporating health preserving production. art of a kind of PHC pile tube of the present invention and application thereof, systematically solve PHC pipe
The Related Technical Issues of the non-evaporating health preserving production. art of stake, has the advantages that
(1) present invention is by PHC tubular pile concrete match ratio and the research of conservation system, ensureing PHC pile tube physics
Mechanical property, durability and on the premise of the production time, do not use steam curing to produce PHC pile tube, thus save a large amount of energy
Consumption, thoroughly changes PHC pile tube high energy consumption history, it is achieved PHC pile tube technique new breakthrough.
(2) performance of the non-evaporating foster PHC pile tube that the present invention develops production meets the requirements of specification, non-evaporating foster
The durability such as the precenting chlorate corrosion performance of PHC tubular pile concrete, frost resistance are higher, and the product quality of PHC pile tube has been effectively ensured,
It is particularly well-suited to the environment that the life requirement such as ocean engineering and the north is higher.
(3) the PHC tubular pile concrete fragility that the present invention produces makes moderate progress, it is ensured that serviceability and beating property.
(4) steam-cured link during the non-evaporating foster PHC pile tube that the present invention produces eliminates stake processed, reduces pile tube system
Make difficulty and cost, and save the energy, thus beneficially environmental protection, it has application prospect widely.
Accompanying drawing explanation
Fig. 1 is shown as the non-evaporating health preserving production. art schematic flow sheet of the PHC pile tube of the present invention.
Detailed description of the invention
The present invention is expanded on further, it should be appreciated that these embodiments are merely to illustrate the present invention below in conjunction with specific embodiment
Rather than limit the scope of the invention.
Below by way of specific instantiation, embodiments of the present invention being described, those skilled in the art can be by this specification
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also be by the most different concrete realities
The mode of executing is carried out or applies, the every details in this specification can also based on different viewpoints and application, without departing from
Various modification or change is carried out under the spirit of the present invention.
It should be clear that conventional equipment in the concrete process equipment indicated or device all use this area in the following example or
Device；All force value and scope are all referring to relative pressure.
In addition, it is to be understood that the one or more method steps mentioned in the present invention do not repel before and after described combination step
Additive method step can also be there is or additive method step can also be inserted between these steps specifically mentioned, unless separately
It is described；Should also be understood that the combination annexation between the one or more equipment/devices mentioned in the present invention is not repelled
Can also exist before and after described unit equipment/device other equipment/devices or these two equipment/devices specifically mentioned it
Between can also insert other equipment/devices, except as otherwise noted.And, except as otherwise noted, the numbering of various method steps is only
Differentiate the convenient tool of various method steps, rather than for limiting the ordering of various method steps or limiting the enforceable model of the present invention
Enclose, being altered or modified of its relativeness, in the case of without essence change technology contents, enforceable when being also considered as the present invention
Category.
As it is shown in figure 1, the invention provides the non-evaporating health preserving production. art of a kind of PHC pile tube, successively through concrete batching, mixed
Solidifying soil stirring, fabrication of reinforcing cage, concrete distributing, prestressed stretch-draw, centrifugal forming, demoulding maintenance processes, thus prepare
Required PHC pile tube, wherein, described demoulding maintenance processes, comprise the following steps:
(1) by PHC pile tube before the demoulding, insulated curing is carried out；
(2) will be through step A) in PHC pile tube after insulated curing, after demoulding, carry out natural curing.
Wherein, in the non-evaporating health preserving production. art of PHC pile tube, concrete batching, concrete-agitating, fabrication of reinforcing cage, coagulation
Handwoven cloth material stretch-draw, centrifugal forming, be the common process in PHC pile tube production technology.The demoulding in demoulding maintenance processes is pipe
Demoulding Shi Hanzhang technique conventional in stake production technology.
Insulated curing is carried out in curing in airtight condition pond.Curing time in insulated curing is 12-48h.
The temperature of insulated curing, according to the corresponding relation between insulated curing time and ambient temperature, by public formula I,
(II), (III) calculates:
Public formula I is: y1=9.73+0.99x；
Public formula II is: y2=12.92+0.92x；
Public formula III is: y3=14.82+0.89x；
In formula: x is average ambient temperature；Y1 is mean temperature in 12 hours curing pools；Y2 is flat in 24 hours curing pools
All temperature；Y3 is mean temperature in 48 hours curing pools.
Corresponding relation between described insulated curing time and ambient temperature is:
When average ambient temperature (x) is 3 DEG C≤x≤15 DEG C, the insulated curing time is 48 hours；
When average ambient temperature (x) is 15 DEG C of ＜ x≤25 DEG C, the insulated curing time is 24 hours；
When average ambient temperature (x) is 25 DEG C of ＜ x≤35 DEG C, the insulated curing time is 12 hours.
The temperature of natural curing is ambient temperature.The time of natural curing is 1-20 days.
Corresponding relation between natural curing time and ambient temperature is:
When average ambient temperature (x) is 3 DEG C≤x≤5 DEG C, the natural curing time is 10～20 days；
When average ambient temperature (x) is 5 DEG C of ＜ x≤10 DEG C, the natural curing time is 6～12 days；
When average ambient temperature (x) is 10 DEG C of ＜ x≤15 DEG C, the natural curing time is 3～6 days；
When average ambient temperature (x) is 15 DEG C of ＜ x≤25 DEG C, the natural curing time is 3～5 days；
When average ambient temperature (x) is 25 DEG C of ＜ x≤40 DEG C, the natural curing time is 1～2 day.
Insulated curing and natural curing do not include steam curing.
Embodiment 1
1, raw material
Cement: strength grade is 52.5 II type portland cements.
Slag powders: strength grade is the ground granulated blast furnace slag of S115.
Fly ash micro-sphere: water demand ratio is 80wt%, within 7 days, activity index is 85%.
Sand: modulus of fineness is the medium sand of 2.7, clay content is 0.5wt%, clod content 0.2wt%.
Rubble: the rubble of 5-25mm continuous grading (formulated by 5-10mm and 16-25 two grating, 5-10mm and 16-
The mass ratio of 25mm is 3:7), clay content is 0.5wt%, and clod content is 0.1wt%.
Water reducer: HP400 early-strength high-efficiency water-reducing agent of poly-carboxylic acid is stepped on by Shanghai China.
Mixing water: use city tap-water.
Early strength agent one: lithium sulfate.
Early strength agent two: triethanolamine.
2, concrete mix (being shown in Table 3)
Table 3 non-evaporating curing concrete match ratio (kg/m3)
| Numbering | Cement | Breeze | Microballon | Sand | Rubble | Water | Water reducer | Triethanolamine | Lithium sulfate |
| Match ratio one | 441 | 47 | 31 | 711 | 1160 | 130 | 4.15 | - | - |
| Match ratio two | 441 | 47 | 31 | 711 | 1160 | 130 | 5.19 | 0.21 | 3.1 |
3, PHC pile tube makes and maintenance
According to the invention provides the non-evaporating health preserving production. art of a kind of PHC pile tube, as it is shown in figure 1, successively through concrete matched
Material, concrete-agitating, fabrication of reinforcing cage, concrete distributing, prestressed stretch-draw, centrifugal forming, demoulding maintenance processes, thus prepare
Obtain required PHC pile tube sample.Wherein, demoulding maintenance processes, before the demoulding, carries out insulated curing, after demoulding, carries out nature
Maintenance, curing condition sees table 1-2.
4, test result
The associated production condition of the PHC pile tube sample 1-7 prepared is (such as concrete mix, insulated curing time, temperature
Degree and natural curing time) it is shown in Table 4, the performance parameter index of the PHC pile tube sample 1-7 prepared (such as demoulding strength, goes out
Factory's intensity) also it is shown in Table 4.
Table 4
From table 4, it can be seen that by using curing pool insulated curing, arrange temperature in curing pool, be effectively improved concrete
Early strength, under the curing pool insulation effect of 12～48 hours, PHC tubular pile concrete demoulding strength is all higher than 45MPa mass
Control requirement.Additionally, for varying environment temperature, use the different natural curing time, concrete strength is continuously increased, concrete
Intensity all reaches 80MPa and dispatches from the factory requirement of strength.
So, the present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.
The principle of above-described embodiment only illustrative present invention and effect thereof, not for limiting the present invention.Any ripe
Above-described embodiment all can be modified under the spirit and the scope of the present invention or change by the personage knowing this technology.Cause
This, have usually intellectual such as complete with institute under technological thought without departing from disclosed spirit in art
All equivalences become are modified or change, and must be contained by the claim of the present invention.
Claims (9)
1. the non-evaporating foster maintenance process of pile tube, comprises the following steps:
1) by pile tube before the demoulding, insulated curing is carried out；
2) will be through step 1) in tubular pile demoulding after insulated curing, after demoulding, carry out natural curing.
The non-evaporating foster maintenance process of pile tube the most according to claim 1, it is characterised in that step 1) in, described insulation is supported
Protect and carry out in curing in airtight condition pond.
The non-evaporating foster maintenance process of pile tube the most according to claim 1, it is characterised in that step 1) in, described insulation is supported
The temperature protected, according to the corresponding relation between insulated curing time and ambient temperature, based on public formula I, (II), (III) are carried out
Calculate:
Described public formula I is: y1=9.73+0.99x；
Described public formula II is: y2=12.92+0.92x；
Described public formula III is: y3=14.82+0.89x；
In formula: x is average ambient temperature；Y1 is mean temperature in 12 hours curing pools；Y2 is average temperature in 24 hours curing pools
Degree；Y3 is mean temperature in 48 hours curing pools.
The non-evaporating foster maintenance process of pile tube the most according to claim 3, it is characterised in that described insulated curing time and ring
Corresponding relation between the temperature of border is:
When average ambient temperature x is 3 DEG C≤x≤15 DEG C, the insulated curing time is 48 hours；
When average ambient temperature x is 15 DEG C of ＜ x≤25 DEG C, the insulated curing time is 24 hours；
When average ambient temperature x is 25 DEG C of ＜ x≤40 DEG C, the insulated curing time is 12 hours.
The non-evaporating foster maintenance process of pile tube the most according to claim 1, it is characterised in that step 1) in, described insulation is supported
Curing time in protecting is 12-48h.
The non-evaporating foster maintenance process of pile tube the most according to claim 1, it is characterised in that step 2) in, described naturally foster
The time protected is 1-20 days.
The non-evaporating foster maintenance process of pile tube the most according to claim 1, it is characterised in that step 2) in, described naturally foster
Protecting the corresponding relation between time and ambient temperature is:
When average ambient temperature (x) is 3 DEG C≤x≤5 DEG C, the natural curing time is 10～20 days；
When average ambient temperature (x) is 5 DEG C of ＜ x≤10 DEG C, the natural curing time is 6～12 days；
When average ambient temperature (x) is 10 DEG C of ＜ x≤15 DEG C, the natural curing time is 3～6 days；
When average ambient temperature (x) is 15 DEG C of ＜ x≤25 DEG C, the natural curing time is 3～5 days；
When average ambient temperature (x) is 25 DEG C of ＜ x≤40 DEG C, the natural curing time is 1～2 day.
8. according to claim 1-7 arbitrary described non-evaporating foster maintenance process of pile tube answering in the production technology of PHC pile tube
With.
9. a non-evaporating health preserving production. art for PHC pile tube, successively through concrete batching, concrete-agitating, fabrication of reinforcing cage, coagulation
Handwoven cloth material, prestressed stretch-draw, centrifugal forming, demoulding maintenance processes, thus prepare required PHC pile tube, wherein,
Described demoulding maintenance processes, comprises the following steps:
A) by PHC pile tube before the demoulding, insulated curing is carried out；
B) will be through step A) in PHC tubular pile demoulding after insulated curing, after demoulding, carry out natural curing.
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