CN1411965A - Technological process for producing centrifugal concrete product by utilizing flyash - Google Patents
Technological process for producing centrifugal concrete product by utilizing flyash Download PDFInfo
- Publication number
- CN1411965A CN1411965A CN02145308A CN02145308A CN1411965A CN 1411965 A CN1411965 A CN 1411965A CN 02145308 A CN02145308 A CN 02145308A CN 02145308 A CN02145308 A CN 02145308A CN 1411965 A CN1411965 A CN 1411965A
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- CN
- China
- Prior art keywords
- concrete
- centrifugal
- flyash
- reducing agent
- water
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Classifications
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/56—Compositions suited for fabrication of pipes, e.g. by centrifugal casting, or for coating concrete pipes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The technological process for adding flyash in production of centrifugal concrete product is characterized by that when the concrete is stirred, the flyash, water-reducing agent, cement, sand, broken stone and water can be simultaneously added together to prepare the concrete mixture containing flyash and water-reducing agent. The centrigugal concrete product made up by using said mixture possesses high after-strength.
Description
Technical field
The present invention relates to a kind of technology method of centrifugal concrete product.
Background technology
In the prior art, centrifugal concrete product (as: pretensioned prestressed concrete pipe pile, annular prestressed concrete electric pole, Circular reinforced concrete pole, Core type prestressed concrete pipe for water, Concrete and reinforced concrete drainage and sewer pipes etc.) production uses cement to be Binder Materials, flyash is not used as the centrifugal concrete admixture.Because proportion (about 2.0g/cm of flyash
3) than proportion (about 3.1g/cm of cement
3) much smaller, therefore, concrete product when centrifugal operation if mix a certain proportion of flyash, in centrifugal process, flyash and sand, rubble, cement etc. produce very serious lamination, cement and flyash also will produce serious lamination in mortar, and make a large amount of flyash accumulate in the inwall of centrifugal concrete product.Because the gelling property of flyash need carry out in the presence of cement aquation to a great extent, therefore, when cement and flyash take place will cause weakening greatly of flyash effect after the serious lamination, the flyash that accumulates in the centrifugal concrete product inwall fails to play gelatification, simultaneously formed the fine coal grieshoch that does not have intensity in a large number at the centrifugal concrete product inwall, Products Quality reduces greatly, and quality is very unstable.Therefore, at present centrifugal concrete product not with flyash as the centrifugal concrete admixture.
Summary of the invention
The object of the present invention is to provide a kind of in centrifugal concrete product is produced the technology method of adding coal ash.The Workable of the centrifugal concrete of making of this method, the late strength of concrete height of centrifugal concrete product, the production cost of centrifugal concrete product can reduce greatly.
Technical scheme of the present invention is: a kind of in centrifugal concrete product is produced the technology method of adding coal ash, with flyash and cement water reducing agent together when concrete stirs and admixture simultaneously such as cement, sand, rubble, water, the concrete that is mixed with fly ash and cement water reducing agent mixes and stirs material, and mixing time during stirring need prolong 0.5 minute during than fly ash not～and 1.5 minutes; Carry out the concrete distributing operation of centrifugal goods then, centrifugal acceleration when goods carry out centrifugal operation will reduce 10%～30% during than fly ash not, centrifugation time need prolong 10%～30% during than fly ash not; The curing temperature of goods when normal temperature is steam-cured need improve 5 ℃～15 ℃ during than fly ash not.
The present invention compared with prior art has the following advantages: the Workable of the centrifugal concrete of making of this method, be easy to concrete distributing, faster production; The concrete later stage of centrifugal concrete product (as 90 days) intensity height; Can utilize waste resource, protection environment, save cement, reduce production costs.
The specific embodiment
A kind of in centrifugal concrete product is produced the technology method of adding coal ash, with flyash and cement water reducing agent together when concrete stirs and admixture simultaneously such as cement, sand, rubble, water, the concrete that is mixed with adding coal ash and cement water reducing agent mixes and stirs material, and mixing time during stirring need prolong 0.5 minute during than fly ash not～and 1.5 minutes; Carry out the concrete distributing operation of centrifugal goods then, centrifugal acceleration when goods carry out centrifugal operation will reduce 10%～30% during than fly ash not, centrifugation time need prolong 10%～30% during than fly ash not; Goods need quiet stopping 1 hour～2 hours during than fly ash not when normal temperature is steam-cured, curing temperature need improve 5 ℃～25 ℃ during than fly ash not.
Described centrifugal concrete product production is that a kind of in the following products or two kinds are compound with the quality grade (dividing by standard GB J146 " flyash concrete application technology standard " regulation) of flyash:
1.I level flyash;
2.II level flyash.
Described centrifugal concrete product production is that a kind of in the following products or two kinds are compound with cement water reducing agent (dividing by standard GB 8076 " concrete admixture " regulation):
1. high efficiency water reducing agent;
2. early strength water-reducing agent;
3. ordinary water-reducing agent;
4. retardation water reducing agent;
5. efficient retarding and water reducing agent.
Described centrifugal concrete product has: pretensioned prestressed concrete pipe pile, annular prestressed concrete electric pole, Circular reinforced concrete pole, Core type prestressed concrete pipe for water, Concrete and reinforced concrete drainage and sewer pipes etc.
When embodiment 1. produces at thin tubular piles produced by prestressed concrete PTC600-70-14, " golden cat board " Portland cement with 42.5 grades on the PII type of I level flyash equivalent replacement 25%, the MD-150 high efficiency water reducing agent of while admixture 1.5%, be mixed with fresh concrete, the control water-cement ratio is 0.27～0.29, slump is 1cm～3cm, and the consumption (kg) of the various materials of every cubic meter of concrete is: cement: flyash: sand: rubble: water: high efficiency water reducing agent=390: 130: 610: 1180: 150: 7.8.Mixing time when concrete stirs is 2.0 minutes, prolongs 0.5 minute during than adding coal ash not.Carry out the concrete distributing operation of centrifugal goods then, the maximum centrifugal acceleration when goods carry out centrifugal operation is 33g (annotates: g is meant acceleration of gravity), will reduce 15% during than fly ash not; Centrifugation time is 16 minutes, prolongs 20% during than fly ash not.Behind concrete distributing, matched moulds, prestressed stretch-draw, will the band mould thin-wall pipe pile send in the steam-cured pond, quiet stop 1 hour after, carry out steam curing.The atmospheric steam curing time is 7 hours, wherein heat up 2 hours, constant temperature 4 hours, cooling 1 hour, and thermostat temperature is 85 ℃, improves 15 ℃ during than fly ash not.The steam-cured end back goods demoulding, natural curing is carried out in the stockyard.Concrete strength testing result, demoulding strength are that 56MPa, 28 days intensity are that 69MPa, 60 days intensity are that 75MPa, 90 days intensity are 89MPa.The pile tube inner wall smooth, uniformity does not have the stone of revealing and flyash and plays grey phenomenon.The PTC600-70-14 thin-wall pipe pile of producing is shown as mechanical property test, cracking moment and ultimate bending moment respectively super design load 15%, 25%.
When embodiment 2. produces at reinforced concrete sewer pipe RCPII φ 1200 * 4000, (the excess coefficient is 1.2 with II level flyash equivalent replacement, the place of cement amount is 25%) " conch board " Portland cement of 32.5 grades on PO type, the JM early strength water-reducing agent of while admixture 1.0%, be mixed with fresh concrete, the control water-cement ratio is 0.33～0.35, slump is 3cm～5cm, and the consumption (kg) of the various materials of every cubic meter of concrete is: cement: flyash: sand: rubble: water: high efficiency water reducing agent=300: 125: 600: 1220: 159: 4.3.Mixing time when concrete stirs is 1.5 minutes, prolongs 0.5 minute during than adding coal ash not.Carry out the concrete distributing operation of centrifugal goods then, the maximum centrifugal acceleration when goods carry out centrifugal operation is 34g (annotates: g is meant acceleration of gravity), will reduce 20% during than fly ash not; Centrifugation time is 18 minutes, prolongs 15% during than fly ash not.Behind concrete distributing, matched moulds, will the band mould drainpipe send in the steam-cured pond, quiet stop 1.5 hours after, carry out steam curing.The atmospheric steam curing time is 6 hours, wherein heat up 1.5 hours, constant temperature 4 hours, cooling 0.5 hour, and thermostat temperature is 90 ℃, improves 10 ℃ during than fly ash not.The steam-cured end back goods demoulding, natural curing is carried out in the stockyard.Concrete strength testing result, demoulding strength are that 30MPa, 28 days intensity are that 42MPa, 60 days intensity are that 50MPa, 90 days intensity are 58MPa.Tube wall is smooth, and uniformity does not have the stone of revealing and flyash and plays grey phenomenon.The drainpipe of producing is shown as mechanical property test, all reach the quality requirement of GB/T11836 " Concrete and reinforced concrete drainage and sewer pipes ".
When embodiment 3. produces at annular prestressed concrete tapered electric pole φ 150 * 10 * C * BY, " sea lion board " Portland cement with 42.5 grades on the PII type of I level flyash equivalent replacement 25%, the FDN high efficiency water reducing agent of while admixture 0.5%, be mixed with fresh concrete, the control water-cement ratio is 0.32～0.34, slump is 3cm～5cm, and the consumption (kg) of the various materials of every cubic meter of concrete is: cement: flyash: sand: rubble: water: high efficiency water reducing agent=345: 115: 625: 1210: 156: 2.3.Mixing time when concrete stirs is 2.0 minutes, prolongs 0.5 minute during than adding coal ash not.Carry out the concrete distributing operation of centrifugal goods then, the maximum centrifugal acceleration when goods carry out centrifugal operation is 35g (annotates: g is meant acceleration of gravity), will reduce 15% during than fly ash not; Centrifugation time is 15 minutes, prolongs 20% during than fly ash not.Behind concrete distributing, matched moulds, prestressed stretch-draw, will the band mould thin-wall pipe pile send in the steam-cured pond, quiet stop 1 hour after, carry out steam curing.The atmospheric steam curing time is 7 hours, wherein heat up 1.5 hours, constant temperature 4.5 hours, cooling 1 hour, and thermostat temperature is 90 ℃, improves 5 ℃ during than fly ash not.The steam-cured end back goods demoulding, natural curing is carried out in the stockyard.Concrete strength testing result, demoulding strength are that 45MPa, 28 days intensity are that 54MPa, 60 days intensity are that 68MPa, 90 days intensity are 76MPa.The electric pole inner wall smooth, uniformity does not have the stone of revealing and flyash and plays grey phenomenon.φ 150 * 10 * C * BY annular prestressed concrete tapered electric pole of producing is shown as mechanical property test, cracking moment and ultimate bending moment respectively super design load 20%, 25%.
When embodiment 4. produces at the tube core of Core type prestressed concrete pipe for water (tube core twines a technology) SYGIIIA800, (the excess coefficient is 1.2 with II level flyash equivalent replacement, the place of cement amount is 25%) " conch board " Portland cement of 42.5 grades on PO type, the MD-150 high efficiency water reducing agent of while admixture 1.0%, be mixed with fresh concrete, the control water-cement ratio is 0.33～0.35, slump is 3cm～5cm, and the consumption (kg) of the various materials of every cubic meter of concrete is: cement: flyash: sand: rubble: water: high efficiency water reducing agent=330: 132: 615: 1250: 155: 4.6.Mixing time when concrete stirs is 1.5 minutes (than an adding coal ash not time prolong 0.5 minute).Carry out the concrete distributing operation of centrifugal goods then, the maximum centrifugal acceleration when goods carry out centrifugal operation is 34g (annotates: g is meant acceleration of gravity), will reduce 20% during than fly ash not; Centrifugation time is 16 minutes, prolongs 15% during than fly ash not.Behind concrete distributing, matched moulds, will the band mould drainpipe send in the steam-cured pond, quiet stop 1.5 hours after, carry out steam curing.The atmospheric steam curing time is 6 hours, wherein heat up 1.5 hours, constant temperature 4 hours, cooling 0.5 hour, and thermostat temperature is 90 ℃, improves 15 ℃ during than fly ash not.The steam-cured end back goods demoulding, natural curing is carried out in the stockyard.Concrete strength testing result, demoulding strength are that 38MPa, 28 days intensity are that 50MPa, 60 days intensity are that 62MPa, 90 days intensity are 71MPa.Tube wall is smooth, and uniformity does not have the stone of revealing and flyash and plays grey phenomenon.The tube core of producing done outward appearance detects and inner pressure test shows, all reach the quality requirement of GB/T11836 " Concrete and reinforced concrete drainage and sewer pipes ".
Claims (4)
1. the technology method of an adding coal ash in centrifugal concrete product is produced, with flyash and cement water reducing agent together when concrete stirs and admixture simultaneously such as cement, sand, rubble, water, the concrete that is mixed with adding coal ash and cement water reducing agent mixes and stirs material, and mixing time during stirring need prolong 0.5 minute during than fly ash not～and 1.5 minutes; Carry out the concrete distributing operation of centrifugal goods then, centrifugal acceleration when goods carry out centrifugal operation will reduce 10%～30% during than fly ash not, centrifugation time need prolong 10%～30% during than fly ash not; Goods need quiet stopping 1 hour～2 hours during than fly ash not when normal temperature is steam-cured, curing temperature need improve 5 ℃～25 ℃ during than fly ash not.
2. centrifugal concrete product production flyash according to claim 1 is characterized in that flyash (dividing by standard GB J146 " flyash concrete application technology standard " regulation) is compound for a kind of in the following products or two kinds:
(1) I level flyash;
(2) II level flyash.
3. centrifugal concrete product production cement water reducing agent according to claim 1 is characterized in that concrete diminishing (dividing by standard GB 8076 " concrete admixture " regulation) is compound for a kind of in the following products or two kinds:
(1) high efficiency water reducing agent;
(2) early strength water-reducing agent;
(3) ordinary water-reducing agent;
(4) retardation water reducing agent;
(5) efficient retarding and water reducing agent.
4. centrifugal concrete product according to claim 1 is characterized in that centrifugal concrete product has: pretensioned prestressed concrete pipe pile, annular prestressed concrete electric pole, Circular reinforced concrete pole, Core type prestressed concrete pipe for water, Concrete and reinforced concrete drainage and sewer pipes etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02145308A CN1411965A (en) | 2002-11-15 | 2002-11-15 | Technological process for producing centrifugal concrete product by utilizing flyash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02145308A CN1411965A (en) | 2002-11-15 | 2002-11-15 | Technological process for producing centrifugal concrete product by utilizing flyash |
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| Publication Number | Publication Date |
|---|---|
| CN1411965A true CN1411965A (en) | 2003-04-23 |
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ID=4750838
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02145308A Pending CN1411965A (en) | 2002-11-15 | 2002-11-15 | Technological process for producing centrifugal concrete product by utilizing flyash |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102172979A (en) * | 2011-02-12 | 2011-09-07 | 嘉兴学院管桩应用技术研究所 | Method for improving concrete strength of cement product |
| CN104960086A (en) * | 2015-06-10 | 2015-10-07 | 江苏东浦管桩有限公司 | Production method of non-surplus-slurry and non-autoclaved prestressed concrete pipe pile |
| US9439364B2 (en) | 2009-07-29 | 2016-09-13 | Erez Yiflach | Apparatus and method for producing an irrigation pipe |
-
2002
- 2002-11-15 CN CN02145308A patent/CN1411965A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9439364B2 (en) | 2009-07-29 | 2016-09-13 | Erez Yiflach | Apparatus and method for producing an irrigation pipe |
| CN102172979A (en) * | 2011-02-12 | 2011-09-07 | 嘉兴学院管桩应用技术研究所 | Method for improving concrete strength of cement product |
| CN104960086A (en) * | 2015-06-10 | 2015-10-07 | 江苏东浦管桩有限公司 | Production method of non-surplus-slurry and non-autoclaved prestressed concrete pipe pile |
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