CN104827564B - It is a kind of to reduce the PC pile tube preparation methods of gel material content - Google Patents
It is a kind of to reduce the PC pile tube preparation methods of gel material content Download PDFInfo
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- CN104827564B CN104827564B CN201510215060.XA CN201510215060A CN104827564B CN 104827564 B CN104827564 B CN 104827564B CN 201510215060 A CN201510215060 A CN 201510215060A CN 104827564 B CN104827564 B CN 104827564B
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- concrete
- temperature
- pile
- binder materials
- gel material
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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
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/02—Methods or machines specially adapted for the production of tubular articles by casting into moulds
- B28B21/10—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means
- B28B21/22—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means using rotatable mould or core parts
- B28B21/30—Centrifugal moulding
-
- 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
-
- 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
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/304—Air-entrainers
Abstract
The invention discloses reduce the PC pile tube preparation methods of gel material content, including step the invention discloses a kind of：1）Prepare and mixed concrete, every cubic metre of gross mass of concrete is 2450 ~ 2520kg, wherein binder materials quality is 320 ~ 420kg, water is 0.28 ~ 0.32 with binder materials mass ratio：1, water reducer consumption is the 1.2 ~ 2.0% of binder materials quality, and air entraining agent is the 0.005 ~ 0.08% of binder materials quality, and surplus is sand and stone, and the wherein mass ratio of sand and sandstone is 0.32 ~ 0.36:1；2）The concrete mixed is put into cloth, pipe pile die matched moulds, tensioning in feeding machine；3）Tubular pile centrifugal；4）Steam curing conservation；5）Tubular pile demoulding；6）Steam press maintenance.The present invention reduces PC pile tube gel material contents by air-entrained agent, reduces remaining slurry amount, and on intensity, durability without influence.
Description
Technical field
It is more particularly to a kind of to reduce the PC pile tube preparation methods of gel material content the invention belongs to building material field.
Background technology
PC pile tubes, i.e. prestressed concrete pipe pile, are the precast concretes commonly used in building foundation, widely should
For engineerings such as all kinds of buildings, traffic, water conservancies.
According to GB 13476-2009《Pretensioned prestressed concrete pipe pile》Regulation, PC pile tubes with concrete strength not
Less than C60.In the production of PC pile tubes, concrete is most large material, and the deciding factor of Cost of Concrete is binder materials.
If gel material content can be reduced, then can just reduce cost, competitiveness is improved.
In existing production technology with the conditions of, the PC pile tube gel material contents in actual production have been reduced levels,
Substantially in 450kg/m3.If directly reducing binder materials, the service behaviour of concrete can be made to be difficult to reach production requirement.
If reducing gel material content, while improving water-cement ratio, although service behaviour can be improved, but it is mixed
Solidifying soil intensity is difficult to reach requirement；If reducing gel material content, while keeping water-cement ratio constant, water reducer consumption is improved,
Service behaviour can also be improved, but too high water reducer volume can make concrete disintegration, bleeding.
In addition, byproduct can be produced using centrifuging process production PC pile tubes --- remaining slurry.Remaining slurry is the quilt in centrifugal process
A part of concrete mortar of extrusion, mainly contains water, cement, mineral admixture, soil（From sand, stone aggregate surface）, subtract
Aqua etc..Remaining slurry does not work for the performance of pile tube product, but if removing this part slurry, the pile tube production before centrifugation
During, do not reach requirement if the service behaviour of concrete mix during cloth, matched moulds etc..Due to remaining slurry composition not
Stable, quality is difficult to control to, and it is dfficult to apply to the production of other concrete products；Some enterprises take remaining slurry reuse skill
Art, increases the complexity and artificial demand of production, also increases the difficulty of pile tube quality control.Remaining slurry belongs to pollutant,
And be difficult to handle after condensing generation intensity, therefore, it is difficult to discharge.How remaining slurry is handled, be to make asking for pile tube manufacturing enterprise headache
Topic.
Air entraining agent can cost-effectively improve the workability of fresh concrete, particularly the coagulation few to gel material content
Native effect is more notable.But GB 50119-2013《Technical code for application of admixture in concrete》Provide air entraining agent and bleed diminishing
Agent should not be used in steam-curing concrete.Because under the conditions of High Temperature Curing, the gas that air entraining agent is introduced can produce huge expansion, such as
The gas content that fruit introduces is incorrect, in some instances it may even be possible to cause concrete strength significantly to decline and durability variation.Therefore, it is traditional
Upper pile tube production is not spiked with air entraining agent.
In view of having centrifugation step in PC pile tube production technologies, in centrifugation, the gas that air entraining agent is introduced can be extruded mixed
Solidifying soil.That is, adding air entraining agent in the mixed concrete stage, the gas of introducing exists only in mix, cloth, matched moulds rank
Section, and these demands concrete have preferable service behaviour.The gas introduced in eccentric phase air entraining agent is extruded, to mixed
Coagulate intensity, the durability influence very little of soil.It is therefore proposed that reducing binder materials in concrete using the method for air-entrained agent
The thinking of consumption.
If air-entrained agent, the consumption of binder materials is reduced, the cement mortar scale of construction is also just correspondingly reduced.During centrifugation,
A part of gas is extruded concrete instead of slurry so that slurry extrusion capacity, namely remaining slurry amount is reduced.Therefore air-entrained agent can
The yield of remaining slurry is reduced to a certain extent.
Through retrieval, two patent documents related to teachings herein are found：Publication No. CN 101096114A China
Patent《High-durability prestressed high-strength concrete pipe pile》With Publication No. CN 101130456A Chinese patent《Outside concrete
Plus agent》, it is directed to the air-entrained agent in tubular pile concrete.But the purpose is to improve pile tube durability, because air entraining agent can be with
The number of bubbles in concrete is improved, the frost resistance of concrete is improved；The bubble that air entraining agent is introduced into is ultimately remained in pile tube, and
Its gel material content is 450 ~ 480kg/m3, it is consistent with common steam pressure PHC pile tubes.This patent and the key difference of above-mentioned patent
It is that the gas that air entraining agent is introduced almost is extruded completely in the eccentric phase, in the prestressed concrete pipe pile product produced almost
The bubble of air entraining agent introducing is not contained, air entraining agent only plays the work of raising working performance of concrete in mix, cloth, matched moulds stage
With so as to provide possibility for further reduction PC pile tube gel material contents.In addition, this patent is directed to PC pile tubes, and on
State patent and be directed to steam pressure prestressed high-strength concrete pile（PHC pile tubes）.Therefore this patent uses the purpose of air entraining agent, made
With there is significant difference with above-mentioned patent on, objective for implementation and the effect of generation.
The content of the invention
To solve prestressed concrete pipe pile（PC pile tubes）The problem of gel material content is high, the present invention provides a kind of reduction
The PC pile tube preparation methods of gel material content.Pass through air-entrained agent so that concrete in mix inside introduce a large amount of gas
Body, improves concrete mix workability, it is easy to stir, cloth, so that situation of the concrete in reduction gel material content
Under still have suitable service behaviour.During tubular pile centrifugal after, concrete extrudes close during high speed centrifugation
Real, these gases are extruded, therefore the intensity and durability of pile tube are substantially unaffected.
The purpose of the present invention is achieved through the following technical solutions：
It is a kind of to reduce the PC pile tube preparation methods of gel material content, including step：
1）Prepare and mixed concrete, described every cubic metre of gross mass of concrete is 2450 ~ 2520kg, wherein binder materials
Quality is 320 ~ 420kg, and the mass ratio of water and binder materials is 0.28 ~ 0.32：1, water reducer consumption is binder materials quality
1.2 ~ 2.0%, air entraining agent consumption is the 0.005 ~ 0.08% of binder materials quality, and surplus is sand and stone, wherein sand and sand
The mass ratio of stone is 0.32 ~ 0.36:1, cement accounts for 65 ~ 75% in the binder materials, and mineral admixture accounts for 25 ~ 35%；
2）The concrete mixed is put into cloth, pipe pile die matched moulds, tensioning in feeding machine；
3）Tubular pile centrifugal, is extruded the gas introduced in concrete by air entraining agent；
4）Steam curing conservation, curing time totally 6 ~ 8h；
5）Tubular pile demoulding；
6）Steam press maintenance, the pile tube after the demoulding is placed in still kettle, and maintenance air pressure is 0.8 ~ 1.2MPa, curing temperature
165 ~ 200 DEG C, steam press maintenance duration 7-12h.
Further, tubular pile centrifugal process includes low speed, low-medium speed, high speed, high speed four-stage successively in step 3,
The rotating speed in each stage is identical with the technique of existing PC pile tubes with the time.
Further, the steam curing conservation process of the step 4 stops the stage, rises to thermostat temperature by quiet temperature of stopping including quiet
Temperature rise period, constant temperature stage, the temperature-fall period four-stage for being down to by thermostat temperature ambient temperature, the quiet temperature for stopping the stage
For 40 ~ 55 DEG C, the temperature in constant temperature stage is 80 ~ 90 DEG C.
Further, before mixed concrete, the air entraining agent is sufficiently mixed with water reducer in advance, is prepared into bleed diminishing
Agent.
Further, the water reducer is polycarboxylate water-reducer or naphthalene water reducer.
Compared with prior art, the invention has the advantages that：
1. the present invention can effectively reduce the gel material content 6 ~ 29% of PC pile tubes, and it is service behaviour to concrete, strong
Degree, durability are substantially without influence, so as to reduce the cost of raw material, improve competitiveness.
2. the present invention can be reduced the byproduct in tubular pile production process --- and the yield of remaining slurry, reduces remaining slurry and is processed into
This.
3. present invention only requires air entraining agent is added in mixed concrete, do not change original technological process, it is not required that increase
Oil (gas) filling device, is easy to promote.
Embodiment
Make further specific detailed description to the present invention with reference to specific embodiment, but embodiments of the present invention are not
It is limited to this, for the technological parameter not indicated especially, can refer to routine techniques progress.
The cement that following examples are used is the 42.5R of China Resources cement P. II, and sand is natural river sand（Sand in 2nd area, modulus of fineness
2.9）, rubble is mixed into continuous grading by the class rubble of particle diameter 0-5mm and 10-20mm two.
Embodiment 1
It is a kind of to reduce the PC pile tube preparation methods of gel material content, including step：
1）Prepare and mixed concrete, described every cubic metre of gross mass of concrete is 2520kg, wherein binder materials quality
For 420kg, the mass ratio of water and binder materials is 0.28：1, water reducer consumption is the 2.0% of binder materials quality, and air entraining agent is used
Measure as the 0.005% of binder materials quality, surplus is sand and stone, and the wherein mass ratio of sand and sandstone is 0.32:1, it is described
Cement accounts for 65% in binder materials, and mineral admixture accounts for 35%；
2）The concrete mixed is put into cloth, pipe pile die matched moulds, tensioning in feeding machine；
3）Tubular pile centrifugal, is extruded the gas introduced in concrete by air entraining agent；
4）Steam curing conservation, curing time totally 6 ~ 8h；
5）Tubular pile demoulding；
6）Steam press maintenance, the pile tube after the demoulding is placed in still kettle, and maintenance air pressure is 0.8 ~ 1.2MPa, curing temperature
165 ~ 200 DEG C, steam press maintenance duration 7-12h.
Further, tubular pile centrifugal process includes low speed, low-medium speed, high speed, high speed four-stage successively in step 3.
Further, the steam curing conservation process of the step 4 stops the stage, rises to thermostat temperature by quiet temperature of stopping including quiet
Temperature rise period, constant temperature stage, the temperature-fall period four-stage for being down to by thermostat temperature ambient temperature, the quiet temperature for stopping the stage
For 40 ~ 55 DEG C, the temperature in constant temperature stage is 80 ~ 90 DEG C.
Further, the water reducer is 10% solid content polycarboxylate water-reducer.
The concrete parameters and performance of PC pile tubes manufactured in the present embodiment are shown in Table 1, and as seen from Table 1, the present embodiment is compared
Existing PC pile tubes technique reduces 6.7% gel material content, and other inspection projects etc. meet the examination criteria of correlation.
Embodiment 2
It is a kind of to reduce the PC pile tube preparation methods of gel material content, including step：
1）Prepare and mixed concrete, described every cubic metre of gross mass of concrete is 2500kg, wherein binder materials quality
For 400kg, the mass ratio of water and binder materials is 0.3：1, water reducer consumption is the 1.6% of binder materials quality, air entraining agent consumption
For the 0.01% of binder materials quality, surplus is sand and stone, and the wherein mass ratio of sand and sandstone is 0.33:1, the glue
Cement accounts for 70% in gel material, and mineral admixture accounts for 30%；
2）The concrete mixed is put into cloth, pipe pile die matched moulds, tensioning in feeding machine；
3）Tubular pile centrifugal, is extruded the gas introduced in concrete by air entraining agent；
4）Steam curing conservation, curing time totally 6 ~ 8h；
5）Tubular pile demoulding；
6）Steam press maintenance, the pile tube after the demoulding is placed in still kettle, and maintenance air pressure is 0.8 ~ 1.2MPa, curing temperature
165 ~ 200 DEG C, steam press maintenance duration 7-12h.
Further, tubular pile centrifugal process includes low speed, low-medium speed, high speed, high speed four-stage successively in step 3.
Further, the steam curing conservation process of the step 4 stops the stage, rises to thermostat temperature by quiet temperature of stopping including quiet
Temperature rise period, constant temperature stage, the temperature-fall period four-stage for being down to by thermostat temperature ambient temperature, the quiet temperature for stopping the stage
For 40 ~ 55 DEG C, the temperature in constant temperature stage is 80 ~ 90 DEG C.
Further, before mixed concrete, the air entraining agent is sufficiently mixed with water reducer in advance, is prepared into bleed diminishing
Agent.
Further, the water reducer is 10% solid content polycarboxylate water-reducer.
The concrete parameters and performance of PC pile tubes manufactured in the present embodiment are shown in Table 1, and as seen from Table 1, the present embodiment is compared
Existing PC pile tubes technique reduces 11.1% gel material content, and other inspection projects etc. meet the examination criteria of correlation.
Embodiment 3
It is a kind of to reduce the PC pile tube preparation methods of gel material content, including step：
1）Prepare and mixed concrete, described every cubic metre of gross mass of concrete is 2480kg, wherein binder materials quality
For 370kg, the mass ratio of water and binder materials is 0.32：1, water reducer consumption is the 1.4% of binder materials quality, and air entraining agent is used
Measure as the 0.03% of binder materials quality, surplus is sand and stone, and the wherein mass ratio of sand and sandstone is 0.35:1, it is described
Cement accounts for 75% in binder materials, and mineral admixture accounts for 25%；
2）The concrete mixed is put into cloth, pipe pile die matched moulds, tensioning in feeding machine；
3）Tubular pile centrifugal, is extruded the gas introduced in concrete by air entraining agent；
4）Steam curing conservation, curing time totally 6 ~ 8h；
5）Tubular pile demoulding；
6）Steam press maintenance, the pile tube after the demoulding is placed in still kettle, and maintenance air pressure is 0.8 ~ 1.2MPa, curing temperature
165 ~ 200 DEG C, steam press maintenance duration 7-12h.
Further, tubular pile centrifugal process includes low speed, low-medium speed, high speed, high speed four-stage successively in step 3.
Further, the steam curing conservation process of the step 4 stops the stage, rises to thermostat temperature by quiet temperature of stopping including quiet
Temperature rise period, constant temperature stage, the temperature-fall period four-stage for being down to by thermostat temperature ambient temperature, the quiet temperature for stopping the stage
For 40 ~ 55 DEG C, the temperature in constant temperature stage is 80 ~ 90 DEG C.
Further, the water reducer is 30% solid content naphthalene water reducer.
The concrete parameters and performance of PC pile tubes manufactured in the present embodiment are shown in Table 1, and as seen from Table 1, the present embodiment is compared
Existing PC pile tubes technique reduces 17.8% gel material content, and other inspection projects etc. meet the examination criteria of correlation.
Embodiment 4
It is a kind of to reduce the PC pile tube preparation methods of gel material content, including step：
1）Prepare and mixed concrete, described every cubic metre of gross mass of concrete is 2450kg, wherein binder materials quality
For 320kg, the mass ratio of water and binder materials is 0.32：1, water reducer consumption is the 1.2% of binder materials quality, and air entraining agent is used
Measure as the 0.08% of binder materials quality, surplus is sand and stone, and the wherein mass ratio of sand and sandstone is 0.36:1, it is described
Cement accounts for 75% in binder materials, and mineral admixture accounts for 25%；
2）The concrete mixed is put into cloth, pipe pile die matched moulds, tensioning in feeding machine；
3）Tubular pile centrifugal, is extruded the gas introduced in concrete by air entraining agent；
4）Steam curing conservation, curing time totally 6 ~ 8h；
5）Tubular pile demoulding；
6）Steam press maintenance, the pile tube after the demoulding is placed in still kettle, and maintenance air pressure is 0.8 ~ 1.2MPa, curing temperature
165 ~ 200 DEG C, steam press maintenance duration 7-12h.
Further, tubular pile centrifugal process includes low speed, low-medium speed, high speed, high speed four-stage successively in step 3.
Further, the steam curing conservation process of the step 4 stops the stage, rises to thermostat temperature by quiet temperature of stopping including quiet
Temperature rise period, constant temperature stage, the temperature-fall period four-stage for being down to by thermostat temperature ambient temperature, the quiet temperature for stopping the stage
For 40 ~ 55 DEG C, the temperature in constant temperature stage is 80 ~ 90 DEG C.
Further, the water reducer is 30% solid content naphthalene water reducer.
The concrete parameters and performance of PC pile tubes manufactured in the present embodiment are shown in Table 1, and as seen from Table 1, the present embodiment is compared
Existing PC pile tubes technique reduces 28.9% gel material content, and other inspection projects etc. meet the examination criteria of correlation.
Table 1 reduces the embodiment of PC pile tube gel material contents
| Bench-marking sample | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | |
| Air entraining agent volume（%） | 0 | 0.005 | 0.01 | 0.03 | 0.08 |
| Gel material content（kg/m3） | 450 | 420 | 400 | 370 | 320 |
| Reduce gel material content（%） | — | 6.7 | 11.1 | 17.8 | 28.9 |
| Steam pressure intensity（MPa） | 74.3 | 72.9 | 72.2 | 75.1 | 73.8 |
| 28d electric fluxes（C） | 744 | 761 | 757 | 784 | 753 |
| PC pile tube testing results* | It is qualified | It is qualified | It is qualified | It is qualified | It is qualified |
*Examination criteria is GB13476-2009《Pretensioned prestressed concrete pipe pile》In prestressed concrete pipe pile
Can standard.
Above-described embodiment is preferably embodiment, but embodiments of the present invention are not by the embodiment of the invention
Limitation, other any Spirit Essences without departing from the present invention and the change made under principle, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (5)
1. a kind of reduce the PC pile tube preparation methods of gel material content, it is characterised in that including step：
1）Prepare and mixed concrete, described every cubic metre of gross mass of concrete is 2450 ~ 2520kg, wherein binder materials quality
For 320 ~ 420kg, the mass ratio of water and binder materials is 0.28 ~ 0.32：1, water reducer consumption for binder materials quality 1.2 ~
2.0%, air entraining agent consumption is the 0.005 ~ 0.08% of binder materials quality, and surplus is sand and stone, wherein sand and stone
Mass ratio is 0.32 ~ 0.36:1, cement accounts for 65 ~ 75% in the binder materials, and mineral admixture accounts for 25 ~ 35%；
2）The concrete mixed is put into cloth, pipe pile die matched moulds, tensioning in feeding machine；
3）Tubular pile centrifugal, is extruded the gas introduced in concrete by air entraining agent；
4）Steam curing conservation, curing time totally 6 ~ 8h；
5）Tubular pile demoulding；
6）Steam press maintenance, the pile tube after the demoulding is placed in still kettle, maintenance air pressure be 0.8 ~ 1.2MPa, curing temperature 165 ~
200 DEG C, steam press maintenance duration 7-12h.
2. the PC pile tube preparation methods of reduction gel material content according to claim 1, it is characterised in that：In step 3
Tubular pile centrifugal process includes low speed, low-medium speed, high speed, high speed four-stage successively.
3. the PC pile tube preparation methods of reduction gel material content according to claim 1, it is characterised in that：The step
4 steam curing conservation process stops the stage, rises to the temperature rise period of thermostat temperature, constant temperature stage, by constant temperature by quiet temperature of stopping including quiet
Temperature is down to the temperature-fall period four-stage of ambient temperature, and the quiet temperature for stopping the stage is 40 ~ 55 DEG C, the temperature in constant temperature stage
For 80 ~ 90 DEG C.
4. the PC pile tube preparation methods of reduction gel material content according to claim 1, it is characterised in that：Mix coagulation
Before soil, the air entraining agent is sufficiently mixed with water reducer in advance, is prepared into gas tracting subtractive agent.
5. the PC pile tube preparation methods of reduction gel material content according to claim 1, it is characterised in that：The diminishing
Agent is polycarboxylate water-reducer or naphthalene water reducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510215060.XA CN104827564B (en) | 2015-04-30 | 2015-04-30 | It is a kind of to reduce the PC pile tube preparation methods of gel material content |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510215060.XA CN104827564B (en) | 2015-04-30 | 2015-04-30 | It is a kind of to reduce the PC pile tube preparation methods of gel material content |
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| CN104827564A CN104827564A (en) | 2015-08-12 |
| CN104827564B true CN104827564B (en) | 2017-10-20 |
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| CN109400018A (en) * | 2018-10-08 | 2019-03-01 | 江门市新会华源管桩有限公司 | A kind of tubular pole exempts to press steam curing technique |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102229484A (en) * | 2011-06-10 | 2011-11-02 | 江苏建华管桩有限公司 | Method for manufacturing tubular pile by adopting pump concrete |
| CN104420465A (en) * | 2013-08-26 | 2015-03-18 | 青岛兴河建材有限公司 | Prestressed concrete pile and production method thereof |
-
2015
- 2015-04-30 CN CN201510215060.XA patent/CN104827564B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102229484A (en) * | 2011-06-10 | 2011-11-02 | 江苏建华管桩有限公司 | Method for manufacturing tubular pile by adopting pump concrete |
| CN104420465A (en) * | 2013-08-26 | 2015-03-18 | 青岛兴河建材有限公司 | Prestressed concrete pile and production method thereof |
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| CN104827564A (en) | 2015-08-12 |
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