CN1431090A - Technical method for producing prestress pipe pile of centrifugal strong concrete with fine grinding steel slag being mixed into - Google Patents
Technical method for producing prestress pipe pile of centrifugal strong concrete with fine grinding steel slag being mixed into Download PDFInfo
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- CN1431090A CN1431090A CN 03112837 CN03112837A CN1431090A CN 1431090 A CN1431090 A CN 1431090A CN 03112837 CN03112837 CN 03112837 CN 03112837 A CN03112837 A CN 03112837A CN 1431090 A CN1431090 A CN 1431090A
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- steel slag
- technical method
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Abstract
A technique for manufacturing prestressed centrigual high-strength concrete pipe pile features that the fine steel slags with the specific surface area greater than or equal to 3500 sq.cm/g can be used to replace 10-40% of high-grade silicate cement.
Description
Technical field
The present invention relates to a kind of production technology method of concrete product.
Background technology
In the prior art, the prestressed centrifugally high-strength concrete tubular pile (is called for short the PHC pile tube, pile body centrifugal concrete strength grade must not be lower than C80) to produce used Binder Materials be high grade silicate cement or Portland cement more than 42.5 grades, proposed " mixing the technology that levigate building sand is produced the pretensioned prestressing high-strength concrete tubular pile " method in the patent of invention 95116762.6.Ground steel slag is done existing application of composite material of the admixture or the cement of normal concrete, does not see that with certain proportion equivalent replacement manufacture of cement prestressed centrifugally high-strength concrete tubular pile report is arranged but mix ground steel slag.
Summary of the invention
The object of the present invention is to provide a kind of ground steel slag of mixing to produce prestressed centrifugally high-strength concrete tubular pile technical method, can produce the prestressed centrifugally high-strength concrete tubular pile with the high grade silicate cement more than 42.5 grades or the Portland cement of ground steel slag equivalent substitution 10%～40% when producing the PHC pile tube with this method.
Technical scheme of the present invention is: a kind of ground steel slag of mixing is produced prestressed centrifugally high-strength concrete tubular pile technical method, and slag is levigate to specific area 〉=3500cm
2/ g is then with the high grade silicate cement more than 42.5 grades or the Portland cement of this ground steel slag equivalent substitution 10%～40%.These two kinds of materials were stirred 90 seconds～180 seconds in forced concrete mixer with sand, rubble, concrete high efficiency water reducing agent, water etc., then compound is fed in the female die of the pile tube punching block of having cleaned out and placed deformed bar; The close upper mold section post-stretching deformed bar of pile tube punching block is placed on this punching block and carries out centrifugal operation on the centrifuge; Carry out atmospheric steam curing behind the centrifugal operation; Carrying out prestressing force behind the atmospheric steam curing puts and opens and the pile tube stripping operation; Used punching block is cleared up, will be sent into through the pile tube after the normal pressure steam curing simultaneously and carry out autoclave curing in the still kettle; Product can dispatch from the factory when the concrete strength of pile tube reached the C80 grade after the autoclave curing.Described feature is: slag is levigate to specific area 〉=3500cm
2/ g is then with the high grade silicate cement more than 42.5 grades or the Portland cement of this ground steel slag equivalent substitution 10%～40%.
The principle of present technique method is: slag is a kind of industrial residue, belongs to CaO-SiO
2-Al
2O
3-Fe
2O
3-FeO-MgO-MnO system, mineral are mainly with C
3S, C
2S, CMS, C
3MS
2With RO (RO is the general name of the solid solution of FeO, MgO, MnO) form existence mutually, the mineral with hydration activity generally have only 40%～70%, and the crystal development of these mineral is bigger, and more complete, activity is lower.Under the normal temperature, C
3S, C
2S has less hydration activity, and CMS, C
3MS
2Do not have gelling property mutually with RO.Slag is levigate to specific area 〉=3500cm
2During/g, under the effect of the water vapour of HTHP (170 ℃～200 ℃, 9～10 atmospheric pressure), C
3S, C
2Crystal activity and the aquation gelling property of S are improved CMS, C greatly
3MS
2With RO mutually and C
3S, C
2The hydrated product generation hydrothermal synthesis reaction of S forms the crystal mineral with higher-strength---holder shellfish mullite and eakleite, thus under the effect of the water vapour of HTHP (170 ℃～200 ℃, 9～10 atmospheric pressure), have gelling property preferably.
The present invention compared with prior art has the following advantages: a kind of ground steel slag of mixing is produced prestressed centrifugally high-strength concrete tubular pile technical method, not only can utilize slag with this method, and can reduce the volume of high grade silicate cement or Portland cement, can economize on resources, cut down the consumption of energy, alleviate the pollution of slag, have good economic benefits and social benefit environment.
The specific embodiment
A kind of ground steel slag of mixing is produced prestressed centrifugally high-strength concrete tubular pile technical method, and slag is levigate to specific area 〉=3500cm
2/ g is then with the high grade silicate cement more than 42.5 grades or the Portland cement of this ground steel slag equivalent substitution 10%～40%.These two kinds of materials were stirred 90 seconds～180 seconds in forced concrete mixer with sand, rubble, concrete high efficiency water reducing agent, water etc., then compound is fed in the female die of the pile tube punching block of having cleaned out and placed deformed bar; The close upper mold section post-stretching deformed bar of pile tube punching block is placed on this punching block and carries out centrifugal operation on the centrifuge; Carry out 70 ℃～90 ℃, 4 hours～8 hours atmospheric steam curing behind the centrifugal operation; Carrying out prestressing force behind the atmospheric steam curing puts and opens and the pile tube stripping operation; Used punching block is cleared up, the pile tube behind the atmospheric steam curing is sent into carried out 170 ℃～200 ℃, 6 hours～12 hours autoclave curing in the still kettle simultaneously; Product can dispatch from the factory when the concrete strength of pile tube reached the C80 grade after the autoclave curing.Described feature is: slag is levigate to specific area 〉=3500cm
2/ g is then with the high grade silicate cement more than 42.5 grades or the Portland cement of this ground steel slag equivalent substitution 10%～40%.
Embodiment 1. produces the AB type prestressed high-strength concrete pile of external diameter 400mm wall thickness 90mm.Slag is levigate to specific area 4200cm
2/ g, (volume of levigate high silica sand is 100kg/m with 42.5 grades PII type portland cement of this ground steel slag equivalent substitution 20% then
3, the volume of cement is 400kg/m
3).These two kinds of materials were stirred 120 seconds in forced concrete mixer with sand, rubble, concrete high efficiency water reducing agent, water etc., then compound is fed in the female die of the pile tube punching block of having cleaned out and placed deformed bar, the upper mold section post-stretching deformed bar of pile tube punching block closes, this punching block is placed on carries out centrifugal operation on the centrifuge, carry out 85 ℃, 7 hours atmospheric steam curing behind the centrifugal operation; Concrete demoulding strength is 50MPa behind the atmospheric steam curing; Carry out prestressing force then and put and open and the pile tube stripping operation, used punching block is cleared up, the pile tube behind the atmospheric steam curing is sent into carried out 185 ℃, 9 hours autoclave curing in the still kettle simultaneously; The concrete strength of pile tube reaches 94MPa after the autoclave curing.The mechanical property testing result of pile tube is shown in Table 1.
The mechanical property testing result of table 1 pile tube
| Detect cracking bending moment kNm | Detectable limit bending moment kNm | Standard cracking bending moment kNm | Standard limit bending moment kNm |
| ????75 | ????128 | ????63 | ????104 |
Claims (6)
1. mix ground steel slag production prestressed centrifugally high-strength concrete tubular pile technical method for one kind, slag is levigate back with certain proportion equivalent substitution high grade silicate cement or Portland cement, then this two kinds of materials and sand, rubble, concrete high efficiency water reducing agent, water stirs in forced concrete mixer together, again compound is fed in the female die of the pile tube punching block of having cleaned out and placed deformed bar, the upper mold section post-stretching deformed bar of pile tube punching block closes, this punching block is placed on carries out centrifugal operation on the centrifuge, carry out atmospheric steam curing behind the centrifugal operation, carrying out prestressing force behind the atmospheric steam curing puts and opens and the pile tube stripping operation, then used punching block is cleared up, simultaneously the pile tube behind the atmospheric steam curing is sent into and carried out autoclave curing in the still kettle, product can dispatch from the factory when the concrete strength of pile tube reached the C80 grade after the autoclave curing.
2. a kind of ground steel slag of mixing according to claim 1 is produced prestressed centrifugally high-strength concrete tubular pile technical method, and its described feature is: specific area 〉=3500cm that slag is levigate
2/ g.
3. a kind of ground steel slag of mixing according to claim 1 is produced prestressed centrifugally high-strength concrete tubular pile technical method, and its described feature is: the high grade silicate cement more than 42.5 grades or the Portland cement of ground steel slag equivalent substitution 10%～40%.
4. a kind of ground steel slag of mixing according to claim 1 is produced prestressed centrifugally high-strength concrete tubular pile technical method, and its described feature is: concrete mixture mixing time in forced concrete mixer is 90 seconds～180 seconds.
5. a kind of ground steel slag of mixing according to claim 1 is produced prestressed centrifugally high-strength concrete tubular pile technical method, and its described feature is: the atmospheric steam curing that carries out 70 ℃～90 ℃, 4 hours～8 hours behind the centrifugal operation.
6. a kind of ground steel slag of mixing according to claim 1 is produced prestressed centrifugally high-strength concrete tubular pile technical method, and its described feature is: carry out 170 ℃～200 ℃, 6 hours～12 hours autoclave curing behind the pile tube stripping operation in still kettle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031128378A CN1186181C (en) | 2003-02-12 | 2003-02-12 | Technical method for producing prestress pipe pile of centrifugal strong concrete with fine grinding steel slag being mixed into |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031128378A CN1186181C (en) | 2003-02-12 | 2003-02-12 | Technical method for producing prestress pipe pile of centrifugal strong concrete with fine grinding steel slag being mixed into |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1431090A true CN1431090A (en) | 2003-07-23 |
| CN1186181C CN1186181C (en) | 2005-01-26 |
Family
ID=4790321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031128378A Expired - Fee Related CN1186181C (en) | 2003-02-12 | 2003-02-12 | Technical method for producing prestress pipe pile of centrifugal strong concrete with fine grinding steel slag being mixed into |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1318196C (en) * | 2004-04-01 | 2007-05-30 | 深圳阿科太新型建材有限公司 | Method for maintaining lightweight wall slab made from concrete by autoclave |
| CN108623253A (en) * | 2018-05-09 | 2018-10-09 | 广西路桥工程集团有限公司 | A kind of full constituent steel slag concrete stake and its processing soft base construction technology |
| CN116283076A (en) * | 2023-01-10 | 2023-06-23 | 福建大力新型建材科技有限公司 | PHC pipe pile based on low-carbon gel material and preparation method thereof |
-
2003
- 2003-02-12 CN CNB031128378A patent/CN1186181C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1318196C (en) * | 2004-04-01 | 2007-05-30 | 深圳阿科太新型建材有限公司 | Method for maintaining lightweight wall slab made from concrete by autoclave |
| CN108623253A (en) * | 2018-05-09 | 2018-10-09 | 广西路桥工程集团有限公司 | A kind of full constituent steel slag concrete stake and its processing soft base construction technology |
| CN116283076A (en) * | 2023-01-10 | 2023-06-23 | 福建大力新型建材科技有限公司 | PHC pipe pile based on low-carbon gel material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1186181C (en) | 2005-01-26 |
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Owner name: JIAXING COLLEGE OF CIVIL ENGINEERING RESEARCH INS Free format text: FORMER OWNER: JIANG YUANHAI Effective date: 20060728 |
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