CN102059740A - Preparation method of prestress high-strength concrete (PHC) tubular pile - Google Patents
Preparation method of prestress high-strength concrete (PHC) tubular pile Download PDFInfo
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- CN102059740A CN102059740A CN 201010543111 CN201010543111A CN102059740A CN 102059740 A CN102059740 A CN 102059740A CN 201010543111 CN201010543111 CN 201010543111 CN 201010543111 A CN201010543111 A CN 201010543111A CN 102059740 A CN102059740 A CN 102059740A
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Abstract
The invention discloses a preparation method of a prestress high-strength concrete (PHC) tubular pile, which comprises the steps of: mixing 8-22 percent by weight of all-spherical superfine fly ash into 78-92 percent by weight of over 42.5 grade high-grade portland cement or common portland cement to form a gel material; and fully stirring the gel material with sand, macadam, naphthalene series superplasticizer or carboxylic acid superplasticizer and water in a forced stirring machine together for 180-240s to obtain a mixture, then feeding the mixture into a lower half die of a tubular pile steel die loaded with prestressed steel, connecting an upper half die of the tubular pile steel die and tensioning the prestressed steel, placing the steel die in a centrifugal machine for centrifuging, then carrying out normal pressure steam curing for 4-5h at a temperature of 70-90 DEG C, cooling and demoulding and then statically curing for 1-3 days to obtain the prestress high-strength concrete tubular pile with compression strength exceeding C80. The density of the concrete is greatly improved, the durability is improved, and the early and later-stage compression strengths of the concrete are greatly enhanced.
Description
Technical field
The present invention relates to the concrete product technical field, the preparation method of specifically a kind of prestressed high-strength concrete pile (PHC).
Background technology
The concrete preparation water consumption of existing pretensioned prestressing high-strength concrete tubular pile (being called for short the PHC pile tube) is relatively large, thereby the intensity of concrete tubular pile is difficult to increase substantially, if need to obtain C80 or above intensity, all adopt the steam-cured technology of secondary high-pressure, this will cause technological process of production lengthening, production cost increases, and energy consumption increases, the consequence that CO2 emission strengthens.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, the preparation method of a kind of prestressed high-strength concrete pile (PHC) is provided.
Technical scheme of the present invention is: global shape superfined flyash is used for the concrete preparation of pretensioned prestressed concrete pipe pile (PHC).Concrete grammar is as follows:
1) first preparation Binder Materials: with the part by weight of global shape superfined flyash 8～22% mix the high grade silicate cement more than 42.5 grades of 78～92% part by weight or Portland cement mix Binder Materials;
2) produce prestressed high-strength concrete pile: with Binder Materials and sand, rubble, how be or the carboxylic acids high efficiency water reducing agent, water fully stirs in forced stirrer together and got compound in 180～240 seconds, then compound is fed in the female die of the pile tube punching block of having placed deformed bar, pile tube punching block upper mold section post-stretching deformed bar closes, this punching block is placed on carries out centrifugal operation on the centrifuge, carry out 70～90 ℃ then, 4～5 hours atmospheric steam curings, rested again after the cooling and demolding 1～3 day, and can obtain the high strength prestressed concrete pipe pile that compression strength surpasses C80.
Above-described global shape superfined flyash, 90% particle diameter is below 10 microns, and its average grain diameter is at 1.5～2.5 microns.Present perfect spherical amorphous glass body under the ESEM, extremely strong filling, diminishing function are arranged.Its chemical composition is roughly as follows:
Chemical composition shows that obviously it is a kind of active pozzolans material.Because its particle diameter is little and the volcanic ash characteristic of itself, makes it have good activity.After tested, the water demand ratio of this superfined flyash is about 85%, and far below I level flyash, the replacement amount is not more than at 15% o'clock, and vivacity is all greater than 100%, and this material is to be generated and obtained through sorting by coal-burning boiler.
The present invention reduces the water consumption of tubular pile concrete owing to add global shape superfined flyash significantly, and this new material is not only as active admixture but also have the function of mineralizer water reducer concurrently.This material and chemical water reducer (how to be or carboxylic acids etc.) compound action is reduced to the water consumption that makes tubular pile concrete below the 100kg/ cubic meter.Because water-cement ratio reduces significantly, owing to little filling effect of this material, concrete packing greatly improves simultaneously, and durability is improved, and compression strength and pliability increase substantially.Only concrete crushing strength can reach more than the 80Mpa after the steam-cured demoulding of normal pressure.Can save high energy consumption, expensive high-pressure steaming and cultivating operation, shorten curing time, save the energy, reduce emission of carbon-dioxide, improve product quality and production efficiency, make product meet or exceed the national requirements of PHC pile tube equally.
The specific embodiment
The material that the present invention uses is a kind of global shape superfined flyash (being produced with one-tenth new material scientific ﹠ technical corporation by the Shenzhen), and 90% particle diameter is below 10 microns, and its average grain diameter is between 1.5～2.5 microns.Present perfect spherical amorphous glass body under the ESEM, extremely strong filling, diminishing function are arranged.Its chemical composition is roughly as follows:
Embodiment 1:
1) first preparation Binder Materials: the high grade silicate cement more than 42.5 grades (or Portland cement) that the part by weight of above-mentioned global shape superfined flyash 20% is mixed 80% part by weight mix Binder Materials.
2) produce the AB type prestressed high-strength concrete pile of external diameter 400mm wall thickness 90mm: with Binder Materials 410 kilograms (by every cubic metre) and 780 kilograms in sand, 1270 kilograms of rubbles, general on the market how be or 11 kilograms of carboxylic acids high efficiency water reducing agents (the colored king of available solid content weight ratio 40% how series high-efficiency water-reducing agent), water fully stirs in forced stirrer together for 90 kilograms and got compound in 240 seconds, then compound is fed in the female die of the pile tube punching block of having placed deformed bar, pile tube punching block upper mold section post-stretching deformed bar closes, this punching block is placed on carries out centrifugal operation on the centrifuge, carry out 70-90 ℃ then, 4 hours atmospheric steam curings, cooling and demolding intensity reaches 88Mpa, after rested again 3 days, can obtain the high strength prestressed concrete pipe pile that compression strength surpasses C80.
Embodiment 2:
1) first preparation Binder Materials: the high grade silicate cement more than 42.5 grades (or Portland cement) that the part by weight of above-mentioned global shape superfined flyash 22% is mixed 78% part by weight mix Binder Materials.
2) produce the AB type prestressed high-strength concrete pile of external diameter 400mm wall thickness 90mm: with Binder Materials 410 kilograms (by every cubic metre) and 790 kilograms in sand, 1300 kilograms of rubbles, general on the market how be or 10 kilograms of carboxylic acids high efficiency water reducing agents (the colored king of available solid content weight ratio 40% how series high-efficiency water-reducing agent), water fully stirs in forced stirrer together for 91 kilograms and got compound in 200 seconds, then compound is fed in the female die of the pile tube punching block of having placed deformed bar, pile tube punching block upper mold section post-stretching deformed bar closes, this punching block is placed on carries out centrifugal operation on the centrifuge, carry out 70-90 ℃ then, 4.5 hour atmospheric steam curing, cooling and demolding intensity reaches 92Mpa, after rested again 2 days, can obtain the high strength prestressed concrete pipe pile that compression strength surpasses C80.
Embodiment 3:
1) first preparation Binder Materials: the high grade silicate cement more than 42.5 grades (or Portland cement) that the part by weight of above-mentioned global shape superfined flyash 8% is mixed 92% part by weight mix Binder Materials.
2) produce the AB type prestressed high-strength concrete pile of external diameter 400mm wall thickness 90mm: with Binder Materials 410 kilograms (by every cubic metre) and 780 kilograms in sand, 1270 kilograms of rubbles, general on the market how be or 11 kilograms of carboxylic acids high efficiency water reducing agents (the colored king of available solid content weight ratio 40% how series high-efficiency water-reducing agent), water fully stirs in forced stirrer together for 93 kilograms and got compound in 180 seconds, then compound is fed in the female die of the pile tube punching block of having placed deformed bar, pile tube punching block upper mold section post-stretching deformed bar closes, this punching block is placed on carries out centrifugal operation on the centrifuge, carry out 70-90 ℃ then, 5 hours atmospheric steam curings, cooling and demolding intensity reaches 82Mpa, after rested again 1 day, can obtain the high strength prestressed concrete pipe pile that compression strength surpasses C80.
After tested, the pile tube that the new technology of removing high-pressure steaming and cultivating from of the foregoing description is produced, test results such as concrete compression strength, rupture strength, tensile splitting strength and concrete static(al) pressurized elastic modelling quantity reach the GB requirement, and the partial test result surpasses national standard.After removing high-pressure steaming and cultivating from, fragility reduction, the toughness of PHC pile tube are improved greatly.
Claims (2)
1. the preparation method of a prestressed high-strength concrete pile (PHC) is characterized in that preparing according to the following steps:
1) first preparation Binder Materials: with the part by weight of global shape superfined flyash 8～22% mix the high grade silicate cement more than 42.5 grades of 78～92% part by weight or Portland cement mix Binder Materials;
2) produce prestressed high-strength concrete pile: with Binder Materials and sand, rubble, how be or the carboxylic acids high efficiency water reducing agent, water fully stirs in forced stirrer together and got compound in 180～240 seconds, then compound is fed in the female die of the pile tube punching block of having placed deformed bar, pile tube punching block upper mold section post-stretching deformed bar closes, this punching block is placed on carries out centrifugal operation on the centrifuge, carry out 70～90 ℃ then, 4～5 hours atmospheric steam curings, rested again after the cooling and demolding 1～3 day, and can obtain the high strength prestressed concrete pipe pile that compression strength surpasses C80.
2. the preparation method of prestressed high-strength concrete pile according to claim 1 (PHC), it is characterized in that: the particle diameter of described global shape superfined flyash 90% is below 10 microns, its average grain diameter is 1.5～2.5 microns, amorphous glass body spherical in shape under the ESEM.
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| CN 201010543111 CN102059740A (en) | 2010-11-15 | 2010-11-15 | Preparation method of prestress high-strength concrete (PHC) tubular pile |
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| CN 201010543111 CN102059740A (en) | 2010-11-15 | 2010-11-15 | Preparation method of prestress high-strength concrete (PHC) tubular pile |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103145390A (en) * | 2013-02-22 | 2013-06-12 | 江苏博特新材料有限公司 | Concrete mixture for PHC (Prestressed High-strength Concrete) pipe pile and PHC pipe pile prepared therefrom |
| CN103641398A (en) * | 2013-11-21 | 2014-03-19 | 江苏东浦管桩有限公司 | Oxygen steaming-free high-strength concrete anticorrosive pipe pile and production method thereof |
| CN104827561A (en) * | 2015-04-30 | 2015-08-12 | 华南理工大学 | Method for preparing stream-pressure PHC (Prestressed high-strength concrete) pipe pile without residual slurry |
| CN104844099A (en) * | 2014-12-31 | 2015-08-19 | 中建商品混凝土（福建）有限公司 | Low-shrinkage, low-viscosity and ultrahigh strength concrete |
| CN104926224A (en) * | 2015-05-19 | 2015-09-23 | 中国矿业大学 | Autoclaved prestressed concrete tube pile applied to marine work environment and preparation method thereof |
| CN105753413A (en) * | 2016-03-09 | 2016-07-13 | 赤峰京环节能建材制造有限公司 | Method using solid wastes to produce concrete culvert pipe of city comprehensive pipe rack |
| CN105818265A (en) * | 2016-04-22 | 2016-08-03 | 东南大学 | Steam-curing-free prestressed high-strength concrete centrifugal pipe pile material and preparing method thereof |
| CN106003397A (en) * | 2016-07-27 | 2016-10-12 | 湖南三快而居住宅工业有限公司 | Concrete precast element maintenance method and system |
| CN111775304A (en) * | 2020-06-16 | 2020-10-16 | 浙江金鑫管桩有限公司 | Application method of nonmetal fibers in PHC concrete pipe pile |
| CN112521105A (en) * | 2020-12-25 | 2021-03-19 | 四川省公路规划勘察设计研究院有限公司 | Concrete prefabricated member for tensioning prestress in short time and preparation method thereof |
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| CN1431089A (en) * | 2003-02-12 | 2003-07-23 | 蒋元海 | Technical method for producing prestress pipe pile of strong concrete with fine grinding high silica sands being mixed into |
| CN1994710A (en) * | 2006-12-20 | 2007-07-11 | 嘉兴学院土木工程研究所 | Technique for producing pipe pile by mixing finely grinded metallurgical slag and fly ash |
| JP2007296749A (en) * | 2006-04-28 | 2007-11-15 | Smc Concrete Kk | Prestressed concrete-made pipe body and jacking method |
| CN101096114A (en) * | 2007-08-10 | 2008-01-02 | 中山市三和建材有限公司 | High-durability prestressed high-strength concrete pipe pile |
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2010
- 2010-11-15 CN CN 201010543111 patent/CN102059740A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1431089A (en) * | 2003-02-12 | 2003-07-23 | 蒋元海 | Technical method for producing prestress pipe pile of strong concrete with fine grinding high silica sands being mixed into |
| JP2007296749A (en) * | 2006-04-28 | 2007-11-15 | Smc Concrete Kk | Prestressed concrete-made pipe body and jacking method |
| CN1994710A (en) * | 2006-12-20 | 2007-07-11 | 嘉兴学院土木工程研究所 | Technique for producing pipe pile by mixing finely grinded metallurgical slag and fly ash |
| CN101096114A (en) * | 2007-08-10 | 2008-01-02 | 中山市三和建材有限公司 | High-durability prestressed high-strength concrete pipe pile |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103145390A (en) * | 2013-02-22 | 2013-06-12 | 江苏博特新材料有限公司 | Concrete mixture for PHC (Prestressed High-strength Concrete) pipe pile and PHC pipe pile prepared therefrom |
| CN103145390B (en) * | 2013-02-22 | 2014-08-06 | 江苏苏博特新材料股份有限公司 | Concrete mixture for PHC (Prestressed High-strength Concrete) pipe pile and PHC pipe pile prepared therefrom |
| CN103641398A (en) * | 2013-11-21 | 2014-03-19 | 江苏东浦管桩有限公司 | Oxygen steaming-free high-strength concrete anticorrosive pipe pile and production method thereof |
| CN104844099B (en) * | 2014-12-31 | 2017-08-25 | 中建商品混凝土（福建）有限公司 | A kind of lower shrinkage low viscosity super high strength concrete |
| CN104844099A (en) * | 2014-12-31 | 2015-08-19 | 中建商品混凝土（福建）有限公司 | Low-shrinkage, low-viscosity and ultrahigh strength concrete |
| CN104827561B (en) * | 2015-04-30 | 2017-08-25 | 华南理工大学 | A kind of steam pressure PHC pile tube preparation methods without remaining slurry |
| CN104827561A (en) * | 2015-04-30 | 2015-08-12 | 华南理工大学 | Method for preparing stream-pressure PHC (Prestressed high-strength concrete) pipe pile without residual slurry |
| CN104926224A (en) * | 2015-05-19 | 2015-09-23 | 中国矿业大学 | Autoclaved prestressed concrete tube pile applied to marine work environment and preparation method thereof |
| CN105753413A (en) * | 2016-03-09 | 2016-07-13 | 赤峰京环节能建材制造有限公司 | Method using solid wastes to produce concrete culvert pipe of city comprehensive pipe rack |
| CN105818265A (en) * | 2016-04-22 | 2016-08-03 | 东南大学 | Steam-curing-free prestressed high-strength concrete centrifugal pipe pile material and preparing method thereof |
| CN106003397A (en) * | 2016-07-27 | 2016-10-12 | 湖南三快而居住宅工业有限公司 | Concrete precast element maintenance method and system |
| CN106003397B (en) * | 2016-07-27 | 2019-08-09 | 湖南三一快而居住宅工业有限公司 | Precast concrete maintenance process and precast concrete curing system |
| CN111775304A (en) * | 2020-06-16 | 2020-10-16 | 浙江金鑫管桩有限公司 | Application method of nonmetal fibers in PHC concrete pipe pile |
| CN112521105A (en) * | 2020-12-25 | 2021-03-19 | 四川省公路规划勘察设计研究院有限公司 | Concrete prefabricated member for tensioning prestress in short time and preparation method thereof |
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Application publication date: 20110518 |