CN108298913A - Pile for prestressed pipe and preparation method thereof suitable for underground sulfate corrosion environment - Google Patents
Pile for prestressed pipe and preparation method thereof suitable for underground sulfate corrosion environment Download PDFInfo
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- CN108298913A CN108298913A CN201810288172.1A CN201810288172A CN108298913A CN 108298913 A CN108298913 A CN 108298913A CN 201810288172 A CN201810288172 A CN 201810288172A CN 108298913 A CN108298913 A CN 108298913A
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- pile
- tube body
- underground
- prestressed pipe
- sulfate corrosion
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/58—Prestressed concrete piles
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2015—Sulfate resistance
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Piles And Underground Anchors (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of pile for prestressed pipe and preparation method thereof for underground sulfate corrosion environment, belong to civil engineering material manufacturing field.The tube body of the pile for prestressed pipe is double-deck pipe body, and tube body outer layer is fiber reinforcement geopolymer based composites protective layer, and internal layer is armored concrete tube layer, the foam concrete of tubular body filling hardening.Protective layer opens the prestressed reinforced concrete pipe layer of inside carrying and extraneous erosion environment isolation.And foam concrete is filled into caliber after its pile sinking at the construction field (site), to avoid the infiltration of underground water from causing directly to destroy to inboard wall of tube body, to increase service life of the pile body in the sulfate corrosion environment of underground.Construction technology of the present invention is easy, can industrial high efficiency production, pipe forming quality is high, durable, disclosure satisfy that the requirement to pile body endurance quality in all kinds of underground sulfate corrosion environments.
Description
Technical field
The present invention relates to a kind of pile for prestressed pipe, specifically a kind of prestressing force suitable for underground sulfate corrosion environment
Pile pile and preparation method thereof.
Background technology
Pile foundation is since it can overcome the influence of unfavorable geological condition and provide compared with high bearing capacity, current all kinds of
Extensive use in engineering.Wherein pile pile due to its low water-cement ratio centrifugal forming, includes pre- answer as a kind of important pile foundation form
The features such as power steel reinforcement cage and control of industrialization produce, pile body forming quality is good, and intensity is high, and convenient and quick construction disclosure satisfy that respectively
The needs of class engineering geology bearing capacity.With the fast development of economic construction of China, urbanization and the continuous of coastal great development push away
Into the demand of pile pile is huge, according to the incomplete statistics of related data, until the end of the year 2007, the year output nearly 2.5 of China's pile pile
Hundred million meters, the output value is up to more than 300 hundred million yuans；To the end of the year 2011, China has 500 Duo Jia pile piles manufacturing enterprises, annual output
More than 3.5 hundred million meters, become the highest country of pile pile yield in the world.
Chinese Regional is vast, and natural environment complexity is various, and Service Environment complexity residing for pile foundation is various, ocean and coastal waters chlorine
Ion erosion environment and inland brine lake and salt-soda soil sulphate corrosion environment are very universal.Concrete structure in different erosion environments
It is not quite similar with mechanism by the degree of erosion damage, concrete structure deterioration is main in ocean and coastal waters chloride erosion environment
Based on the swollen cracking destruction that becomes rusty caused by steel bar corrosion, but in salt lake and salt-soda soil sulfate corrosion environment, concrete structure
Durability deterioration mainly with sulphate crystal spalling destroy based on.The corrosiveness of erosion carbon dioxide will under these environmental conditions
Very important damage can be generated to pile body, seriously affect the quality of pile body, jeopardize the bearing capacity and properties of pile body, and
With the extension of time, its breakoff phenomenon constantly aggravates, serious security risk is brought, seriously threatens the safety of superstructure.
As a result,《Code for design of corrosion prevention of industrial buildings》GB50046-2008 is provided, since there are deformed bars for pile pile
The problem relatively thin to corrosion-susceptible and tube wall, SO4 2-It is strong corrosive medium, sulfate corrosion environment lower prestress coagulation with Cl-
Native pile pile should not use, and chloride erosion environment lower prestress concrete tubular pile is not easy to use.Pile pile row is undoubtedly given in the restriction of specification
The development of industry brings crisis, and also an urgent demand, which is designed, is more in line with the pile-type of industry requirement to serve the hair of building trade
Exhibition.
Geopolymer is a kind of novel inorganic nonmetallic materials that new development in recent years is got up, and is alkaline activity gelling material
Most one kind of future in material.This kind of material is mostly using natural aluminosilicate mineral or industrial solid wastes as primary raw material, with it
After his mineral admixture and alkali silicate solution are sufficiently mixed, the maintenance molding hardening under room temperature or making condition, be it is a kind of by
The cementitious material that aluminosilicate gelling component bonds.Compared with traditional portland cement, geology polymer material has high-strength
（Compression strength is up to 60-150MPa）, acid and alkali-resistance salt corrosion（It is impregnated for a long time in sulfate liquor, performance is stablized, and does not corrode）、
Dense micro-structure permeability is extremely low（1 percent of its infiltration coefficient less than Portland cement）The advantages that；It is a kind of environment-friendly type
Green construction material.If adding geopolymer protective layer outer wall on pile pile surface, the sulfuric-resisting of pile pile can be greatly improved
Salt corrosion ability, to which pile pile to be applied in sulfate corrosion environment.
Invention content
The goal of the invention of the present invention is customer service defect of the existing technology, is provided a kind of suitable for underground sulfuric acid salt contamination
The pile for prestressed pipe and preparation method thereof for losing environment wants pile body endurance quality under the conditions of the sulfate attack of underground with meeting
It asks.
In order to achieve the above object, the technical proposal of the invention is realized in this way：
Suitable for the pile for prestressed pipe of underground sulfate corrosion environment, including tube body.The tube body is double-deck pipe body, tube body outer layer
For fiber reinforcement geopolymer based composites protective layer, internal layer is armored concrete tube layer；The bubble of tubular body filling hardening
Foam concrete.
The fiber reinforcement geopolymer based composites, are made of powder body material and organic fiber, and fiber accounts for powder material
The mass percent of material is：3-8%.
The component and mass percent of the powder body material be：Graining blast-furnace cinder micro-powder 50-70%；Pozzolanic materials
10-30%；Portland cement 5-15%；Sodium silicate exciting agent（The Na2O meterings contained with it）4-8%.
The organic fiber is polypropylene fibre, polyacrylonitrile fibre, superhigh molecular weight polyethylene fibers, polyvinyl alcohol fibre
Dimension, polyester fiber or polyformaldehyde fibre.
The graining blast-furnace cinder micro-powder be S95 grade graining blast-furnace cinder micro-powders, be granulated blast-furnace slag through iron removal by magnetic separation
It handles and grinding reaches the m2/kg of specific surface area >=400 and is made, wherein grain size is less than 30 μm of superfine graining blast-furnace cinder
Micro mist accounts for 90% of gross mass or more；
The pozzolanic materials is silicon ash, kaolin or flyash.
The sodium silicate exciting agent be waterglass after sodium hydroxide is reconciled, modulus be 1.0~2.0, Baume degrees is 37 °
~41 ° of sodium silicate.
Foam concrete be foaming agent is mechanically fully foamed by the foamed system of foaming machine, and by foam with
Cement mortar uniformly mixes, and the pumping system for then passing through foaming machine carries out cast-in-place construction or mold molding, through natural curing institute shape
At a kind of novel light insulation material containing a large amount of sealed porositys.
The pile pile utilizes secondary centrifuging technique productions, for the first time the protective layer outer wall of centrifugal forming resisting erosion of sulfate, mainly
The isolation effect of going along with sb. to guard him is played, secondary centrifuging is molded armored concrete tube body, main to play stress carrying effect.Using being molded for the first time
Anti-erosion protective layer outer wall inside carrying tube body and extraneous erosion environment isolation are opened, avoid the inside in erosion environment and hold
Carry the destruction of pipe structure integrality and the decline of properties., water consumption is advisable with slurry liquid-solid ratio=0.3-0.5
The present invention is suitable for the preparation method of the pile for prestressed pipe of underground sulfate corrosion environment, and its step are as follows：
Step 1. is consolidated mass ratio=0.3-0.5 according to liquid and is matched, and water is added to prepare fiber reinforcement geopolymer based composites slurries.
The preparation of step 2. resisting erosion of sulfate tube body
Steel reinforcement cage is placed in centrifuge mold；Then fiber reinforcement geopolymer based composites slurries, centrifugal casting are filled
Outer surface of tube body wraps up in attached fiber reinforcement geopolymer based composites protective layer, curing in the mold to setting time, first one-step forming；Again
Carry out tube body concrete batching system cloth, according to the construction technology tensioned prestressing bar of existing pile for prestressed pipe, again from
The heart is molded, and carries out steam press maintenance, obtains the resisting erosion of sulfate tube body.
Step 3. fills out core protection
At the construction field (site) after pile sinking, foam concrete is filled into resisting erosion of sulfate tube body, up to the present invention after its hardening
Pile pile.The part foam concrete is not subject to load, and the main filling effect that plays is to avoid the underground water containing corrosive medium
It is penetrated into pipe by pile pile junction, erosion damage is directly generated to tubular body.
The size and the protective layer outer wall performance of centrifugal forming for the first time of pile pile sulphate-corrosion resistance energy are closely related, specifically
It is characterized as：With outer wall（Material）The increase of corrosion resistance, the increase of outer wall thickness, the erosion-resisting characteristics of pile pile are stronger.It is real
It can be according to the reasonable adjusted design for specifically descending the size of condition of sulfate erosion degree to carry out material and wall thickness in the engineering of border.
The time interval centrifuged twice is rationally controlled, coalescence at the beginning of the protective layer outer wall in centrifugal forming for the first time reaches certain strong
After degree, it can continue feeding and carry out secondary centrifuging molding, specific strength values should be to ensure in secondary centrifuging forming process middle pipe
Stake outer wall is not damaged as according to progress reasonable arrangement design.To meet maximum journey on the basis of not generating damage to outer wall
Degree ground makes molding outer wall for the first time and the tube body of post forming closely connect.
Pile pile of the present invention has the advantages that：
（1）Resisting erosion of sulfate ability is high, durable.
The protective layer outer wall construction of product of the present invention uses the fiber reinforcement geopolymer system that high sulfate resisting corrodes
It is standby to form.Pass through the protective layer outer wall construction of centrifugal forming for the first time so that the reinforced concrete structure of inside carrying is from outside
Corrode the interference of sexual factor.Foam concrete is perfused in managing simultaneously, prevents the intrusion of underground water from generating erosion to pile pile inner wall.Two
Person's collective effect makes pile body bearing capacity stablize, and properties do not fail, and meets durable to pile body under erosion environment
The requirement of performance.It disclosure satisfy that the sulphate-corrosion resistance energy of underground concrete structure construction requirement through preliminary test.
（2）It disclosure satisfy that the underground environment of different sulfate attack degree.
It, can be by rationally designing the protective layer of centrifugal forming for the first time according to the difference of underground environment sulfate ion content
Outer wall wall thickness meets requirement of the different degrees of erosion environment in underground to pile body durability.I.e. etching medium is dense in underground environment
Degree is bigger, and erosion destruction is stronger, and the outer wall of centrifugal forming just should be thicker.
（3）Structure combining form is reasonable, and bearing capacity is high
The protective layer outer wall of centrifugal forming and filled and process coagulation earth removal play outside insulation blocking effect for the first time, while also to answering in advance
Power armored concrete tube body generates sidewise restraint effect so that tube body its mechanical property in pressure-bearing can be played preferably, warp
Test pile pile mechanics bearing capacity of the present invention is apparently higher than same pile for prestressed pipe.
（4）Production efficiency is high, super quality and competitive price
The present invention is suitable for heavy industrialization, mechanization production, and production efficiency is high, and forming quality is high, and it is convenient to construct, durable
Performance is good, durable, and economic value is high.
Specific implementation mode
With reference to embodiment, invention is further described in detail.
Embodiment 1 is suitable for the pile for prestressed pipe of underground sulfate corrosion environment, and tube body is armored concrete tube body.
Attached fiber reinforcement geopolymer based composites protective layer, the foam coagulation of tubular body filling hardening are wrapped up in outer surface of tube body
Soil.
The fiber reinforcement geopolymer based composites of the fiber reinforcement geopolymer based composites protective layer, by powder
Body material and organic fiber composition, the mass percent that fiber accounts for powder body material are：5%.
The component and mass percent of the powder body material be：Graining blast-furnace cinder micro-powder 60%；Pozzolanic materials
20%；Portland cement 10%；Sodium silicate exciting agent（The Na2O meterings contained with it）8%.
The organic fiber uses polypropylene fibre.
The graining blast-furnace cinder micro-powder be S95 grade graining blast-furnace cinder micro-powders, be granulated blast-furnace slag through iron removal by magnetic separation
It handles and grinding reaches the m2/kg of specific surface area >=400 and is made, wherein grain size is less than 30 μm of superfine graining blast-furnace cinder
Micro mist accounts for 90% of gross mass or more.
The pozzolanic materials is silicon ash.
The sodium silicate exciting agent is waterglass after sodium hydroxide is reconciled, the sodium that modulus 1.5, Baume degrees are 39 °
Waterglass.
Foam concrete be foaming agent is mechanically fully foamed by the foamed system of foaming machine, and by foam with
Cement mortar uniformly mixes, and the pumping system for then passing through foaming machine carries out cast-in-place construction or mold molding, through natural curing institute shape
At a kind of novel light insulation material containing a large amount of sealed porositys.
The preparation process of the present embodiment pile pile is as follows：
Step 1. is consolidated mass ratio=0.3-0.5 according to liquid and is matched, and water is added to prepare fiber reinforcement geopolymer based composites slurries.
The preparation of step 2. resisting erosion of sulfate tube body
Steel reinforcement cage is placed in centrifuge mold；Then fiber reinforcement geopolymer based composites slurries, centrifugal casting are filled
Outer surface of tube body wraps up in attached fiber reinforcement geopolymer based composites protective layer, curing in the mold to setting time, molding；It carries out again
The cloth of tube body concrete batching system is centrifuged into again according to the construction technology tensioned prestressing bar of existing pile for prestressed pipe
Type obtains the resisting erosion of sulfate tube body, and conserves molding.
Step 3. fills out core protection
At the construction field (site) after pile sinking, foam concrete is filled into resisting erosion of sulfate tube body, up to the present invention after its hardening
Pile pile.
Embodiment 2, it is substantially the same manner as Example 1, except that：The fiber reinforcement geopolymer based composites
The mass percent that fiber accounts for powder body material is：3%.
The component and mass percent of the powder body material be：Graining blast-furnace cinder micro-powder 50%；Pozzolanic materials
30%；Portland cement 15%；Sodium silicate exciting agent（The Na2O meterings contained with it）5%.
The organic fiber is fine using polyacrylonitrile fibre, superhigh molecular weight polyethylene fibers, vinal, polyester
Dimension or polyformaldehyde fibre.
The pozzolanic materials is kaolin or flyash.
The sodium silicate exciting agent is waterglass after sodium hydroxide is reconciled, the sodium that modulus 1.0, Baume degrees are 37 °
Waterglass.
Embodiment 3 is substantially the same manner as Example 1, except that：The fiber reinforcement geopolymer based composites, by
Powder body material and organic fiber composition, the mass percent that fiber accounts for powder body material are：8%.
The component and mass percent of the powder body material be：Graining blast-furnace cinder micro-powder 70%；Pozzolanic materials
10%；Portland cement 15%；Sodium silicate exciting agent（The Na2O meterings contained with it）5%.
The sodium silicate exciting agent is waterglass after sodium hydroxide is reconciled, the sodium that modulus 2.0, Baume degrees are 41 °
Waterglass.
Claims (7)
1. a kind of pile for prestressed pipe suitable for underground sulfate corrosion environment, including tube body；It is characterized in that：The tube body is double
Layer tube body, tube body outer layer are fiber reinforcement geopolymer based composites protective layer, and internal layer is armored concrete tube layer；In tube body
The foam concrete of portion's filling hardening；
The fiber reinforcement geopolymer based composites, are made of powder body material and organic fiber, and organic fiber accounts for powder material
The mass percent of material is：3-8%.
2. it is suitable for the pile for prestressed pipe of underground sulfate corrosion environment according to claim 1, it is characterized in that：It is described organic
Fiber is polypropylene fibre, polyacrylonitrile fibre, superhigh molecular weight polyethylene fibers, vinal, polyester fiber or poly-
Formaldehyde fibers.
3. it is suitable for the pile for prestressed pipe of underground sulfate corrosion environment according to claim 1, it is characterized in that：The powder
The component and mass percent of material be：Graining blast-furnace cinder micro-powder 50-70%；Pozzolanic materials 10-30%；Silicate
Cement 5-15%；Sodium silicate exciting agent is measured with the Na2O that it contains, and is 4-8%.
4. it is suitable for the pile for prestressed pipe of underground sulfate corrosion environment according to claim 3, it is characterized in that：The granulation
Blast-furnace cinder micro-powder is S95 grades of graining blast-furnace cinder micro-powders, is handled through iron removal by magnetic separation for granulated blast-furnace slag and grinding makes it reach
Obtained to specific surface area >=400 m2/kg, wherein superfine graining blast-furnace cinder micro-powder of the grain size less than 30 μm accounts for the 90% of gross mass
More than.
5. it is suitable for the pile for prestressed pipe of underground sulfate corrosion environment according to claim 3, it is characterized in that：The volcano
Grey material is silicon ash, kaolin or flyash.
6. it is suitable for the pile for prestressed pipe of underground sulfate corrosion environment according to claim 3, it is characterized in that：The sodium water
Glass exciting agent is waterglass after sodium hydroxide is reconciled, the sodium silicate that modulus is 1.0~2.0, Baume degrees is 37 °~41 °.
7. the preparation side of the pile for prestressed pipe suitable for underground sulfate corrosion environment described in a kind of one of claim 1-6
Method, its step are as follows：
Step 1. is consolidated mass ratio=0.3-0.5 according to liquid and is matched, and water is added to prepare fiber reinforcement geopolymer based composites slurries；
The preparation of step 2. tube body
Steel reinforcement cage is placed in centrifuge mold；Then fiber reinforcement geopolymer based composites slurries, centrifugal casting are filled
Outer surface of tube body wraps up in attached fiber reinforcement geopolymer based composites protective layer, curing in the mold to setting time, first one-step forming；Again
Carry out tube body concrete batching system cloth, according to the construction technology tensioned prestressing bar of existing pile for prestressed pipe, again from
The heart is molded, and carries out steam press maintenance, obtains the tube body；
Step 3. fills out core protection
At the construction field (site) after pile sinking, foam concrete is filled into tube body, waits for its hardening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810288172.1A CN108298913B (en) | 2018-04-03 | 2018-04-03 | Prestressed pipe pile suitable for underground sulfate corrosion environment and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810288172.1A CN108298913B (en) | 2018-04-03 | 2018-04-03 | Prestressed pipe pile suitable for underground sulfate corrosion environment and preparation method thereof |
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| Publication Number | Publication Date |
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| CN108298913A true CN108298913A (en) | 2018-07-20 |
| CN108298913B CN108298913B (en) | 2021-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810288172.1A Active CN108298913B (en) | 2018-04-03 | 2018-04-03 | Prestressed pipe pile suitable for underground sulfate corrosion environment and preparation method thereof |
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Cited By (4)
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| CN109081640A (en) * | 2018-09-13 | 2018-12-25 | 福建瑞森水泥制品发展有限公司 | A kind of geo-polymer composite pole and preparation method thereof |
| CN110423060A (en) * | 2019-07-04 | 2019-11-08 | 福建省大地管桩有限公司 | The steam-cured tubular pole manufacturing process of double moldings |
| WO2020097690A1 (en) * | 2018-11-16 | 2020-05-22 | Canasia Australia Pty Ltd | Geopolymer compositions |
| US10843969B2 (en) | 2019-03-01 | 2020-11-24 | King Fahd University Of Petroleum And Minerals | Alkali activated natural pozzolan based concrete containing ground granulated blast furnace slag |
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| US10843969B2 (en) | 2019-03-01 | 2020-11-24 | King Fahd University Of Petroleum And Minerals | Alkali activated natural pozzolan based concrete containing ground granulated blast furnace slag |
| CN110423060A (en) * | 2019-07-04 | 2019-11-08 | 福建省大地管桩有限公司 | The steam-cured tubular pole manufacturing process of double moldings |
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| Publication number | Publication date |
|---|---|
| CN108298913B (en) | 2021-02-12 |
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