CN101249696A - Production technology of high-strength pipe pile by combined admixture of ground granulated metallurgical slag and ground granulated quartz sand as well as coal ash - Google Patents
Production technology of high-strength pipe pile by combined admixture of ground granulated metallurgical slag and ground granulated quartz sand as well as coal ash Download PDFInfo
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- CN101249696A CN101249696A CNA2008100870485A CN200810087048A CN101249696A CN 101249696 A CN101249696 A CN 101249696A CN A2008100870485 A CNA2008100870485 A CN A2008100870485A CN 200810087048 A CN200810087048 A CN 200810087048A CN 101249696 A CN101249696 A CN 101249696A
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- slag
- flyash
- quartz sand
- metallurgical slag
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Abstract
The invention aims to provide a technology for producing a high-strength tubular pipe by mixing grinded metallurgical slag, grinded arenaceous quartz and fly ash. During the tubular pile production with the technology, the grinded metallurgical slag, the grinded arenaceous quartz and the fly ash are mixed according to a certain proportion to replace 30% to 60% of the high-grade silicate cement or regular silicate cement. The method can not only utilize the metallurgical slag and the fly ash, but also reduce the proportion of cement, increase the initial strength and long-term strength of the tubular pile concrete, save resources, reduce energy consumption and produce good economic and social benefits.
Description
Technical field
The present invention relates to a kind of production technology method of high-strength concrete tubular pile.
Background technology
In the prior art, the used Binder Materials of prestressed high-strength concrete pile (being called for short high-strength pipe pile, i.e. PHC pile tube) production is high grade silicate cement or the Portland cement more than 42.5 grades.Prestressed high-strength concrete pile, concrete design strength are the C80 grade.Ground steel slag, ground slags etc. are referred to as levigate metallurgical slag, ground steel slag, ground slags etc. are as the admixture existing application in the PHC pile tube separately of tubular pile concrete, fly ash is produced prestressed high-strength concrete pile also application, mix levigate quartz sand production prestressed high-strength concrete pile application is also arranged, what announce is that bi-component is mixed technology again to patent ZL 03113256.1 " levigate metallurgical slag and levigate silica sand are mixed method again and produced the pile tube technology ", but levigate metallurgical slag and levigate quartz sand and flyash three components are mixed again and do not see that with certain proportion equivalent replacement portland cement production pile tube report is arranged.
Summary of the invention
The object of the present invention is to provide a kind of levigate metallurgical slag and levigate quartz sand and flyash three components to mix the production technology of high-strength pipe pile again, can be with levigate metallurgical slag and grinding fine quartz sand and flyash the portland cement or the Portland cement production high-strength pipe pile of label more than 32.5 grades when producing high-strength pipe pile with the compound equivalent substitution 40%～60% afterwards of certain proportion with this technology.
Technical scheme of the present invention is: a kind of levigate metallurgical slag and levigate quartz sand and flyash three components are mixed the production technology of high-strength pipe pile again, with specific area 350～600m
2The slag of/kg (or slag) and specific area 350～600m
2The flyash of/kg and specific area are 350～600m
2The levigate quartz sand of/kg substitutes 40%～60% the portland cement or the Portland cement of label more than 32.5 grades with the certain proportion equivalent volumes, wherein to account for the ratio of admixture total amount be 10%～30% to flyash, and the ratio that slag (or slag) accounts for the admixture total amount is 40%～80%.This three-component composite doping material, cement, sand, rubble, concrete high efficiency water reducing agent, water are stirred in forced concrete mixer together, then compound is fed in the female die of the pile tube punching block of cleaning 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; Carry out prestressing force behind the atmospheric steam curing and put and open and the pile tube stripping operation, used punching block is cleared up; To send into through the pile tube behind the atmospheric steam curing and carry out autoclave curing in the still kettle, product can dispatch from the factory when the concrete strength of pile tube reached the regulation grade after the autoclave curing.Described feature is: mix substituted for silicon acid salt cement or Portland cement again with the lower levigate metallurgical slag of production cost and levigate quartz sand and flyash three components, and adopt autoclave curing explained hereafter high-strength pipe pile.
The principle of present technique method is: specific area 350～600m
2The slag of/kg (or slag) has good morning of strong hydrating capacity, and equivalent substitution portland cement or Portland cement can improve concrete early strength.Specific area 350～600m
2Coal ash instead part portland cement or the Portland cement of/kg, wherein to account for the ratio of admixture total amount be 10%～30% to flyash, the ratio that slag (or slag) accounts for the admixture total amount is 40%～80%.The concrete of admixture metallurgical slag and flyash, levigate quartz sand is through 70 ℃～100 ℃, 4 hours～10 hours atmospheric steam curing, the active A l in the flyash
2O
3Will with the SO in the cement
3And hydrated product Ca (OH)
2React; Under the effect of the saturated vapor of HTHP (170 ℃～200 ℃, 9～10 atmospheric pressure), the SiO in levigate quartz sand and the flyash
2With C
3S (tricalcium silicate), C
2The hydrated product Ca (OH) of S (dicalcium silicate)
2Hydrothermal synthesis reaction takes place, and forms the crystal mineral with higher-strength---holder shellfish mullite, thus concrete has gelling property preferably under the water vapor acting of HTHP (170 ℃～200 ℃, 9～10 atmospheric pressure).Admixture ground slag (or slag) can remedy the reduction of the early age strength of concrete that causes because of adding coal ash, levigate quartz sand; And the levigate quartz sand of admixture, flyash can improve the intensity of tubular pile concrete again under the autoclave curing condition.
The present invention compared with prior art has the following advantages: a kind of levigate metallurgical slag and levigate quartz sand and flyash three components are mixed the technology of high-strength pipe pile method of producing again, not only can utilize slag (or slag) and flyash with this method, and can reduce the volume of portland cement or Portland cement, can economize on resources, cut down the consumption of energy, alleviate the pollution of slag (or slag) and flyash, have good economic benefits and social benefit environment.
The specific embodiment
A kind of levigate metallurgical slag and levigate quartz sand and flyash three components are mixed again and are produced the pile tube technology, with specific area 350～600m
2The slag of/kg (or slag) and specific area 350～600m
2The flyash of/kg and specific area 350～600m
2The levigate quartz sand of/kg substitutes 40%～60% portland cement more than 32.5 grades or Portland cement with the certain proportion equivalent volumes, wherein to account for the ratio of admixture total amount be 10%～30% to flyash, and the ratio that slag (or slag) accounts for the admixture total amount is 40%～60%.Admixture was stirred 90 seconds～180 seconds in forced concrete mixer with cement, 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, centrifuging process control requires: the acceleration of gravity that initial velocity is 2～5 times, 1～3 minute time; The acceleration of gravity that low speed is 10～15 times, 2～6 minutes time; The acceleration of gravity that middling speed is 20～30 times, 2～8 minutes time; The acceleration of gravity that high speed is 35～50 times, 5～12 minutes time.Carry out 70～100 ℃, 4～8 hours atmospheric steam curing behind the centrifugal operation; Carry out prestressing force behind the atmospheric steam curing and put and open and the pile tube stripping operation, used punching block is cleared up; Simultaneously the pile tube behind the atmospheric steam curing is sent into and carried out 160 ℃～200 ℃, 4 hours～12 hours autoclave curing in the still kettle; Product can dispatch from the factory when the concrete strength of pile tube reached design grade after the autoclave curing.
Embodiment 1. produces the AB type prestressed high-strength concrete pile of external diameter 400mm wall thickness 90mm.With specific area 420m
2The slag of/kg (or slag) and specific area 460m
2The flyash of/kg and specific area 440m
2The levigate quartz sand of/kg substitutes 50% the high grade silicate cement more than 42.5 grades with 5: 2: 3 ratio equivalent volumes.Admixture was stirred 120 seconds in forced concrete mixer with cement, 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 98 ℃, 7 hours atmospheric steam curing behind the centrifugal operation; Concrete demoulding strength is 45MPa 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 92MPa 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 |
| 72 | 118 | 63 | 104 |
Claims (5)
1. a levigate metallurgical slag and levigate quartz sand and flyash three components are mixed the production technology of high-strength pipe pile again, ground slag or slag, levigate quartz sand and flyash are stirred into compound with cement, sand, rubble, concrete high efficiency water reducing agent, water in forced concrete mixer, 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 atmospheric steam curing behind the centrifugal operation; Carry out prestressing force behind the atmospheric steam curing and put and open and the pile tube stripping operation, simultaneously the pile tube after the demoulding is carried out autoclave curing, product can dispatch from the factory when the concrete strength of pile tube reached design grade after the autoclave curing.
2. a kind of levigate metallurgical slag according to claim 1 and levigate quartz sand and flyash three components are mixed the production technology of high-strength pipe pile again, and its described feature is: with specific area 350～600m
2The slag of/kg or slag and specific area 300～600m
2The flyash of/kg, specific area 300～600m
2The quartz sand of/kg mixes the portland cement more than 32.5 grades or the Portland cement of back equivalent substitution 30%～60%, and the ratio that flyash accounts for the admixture total amount is 10%～30%, and the ratio that slag (or slag) accounts for the admixture total amount is 40%～80%.
3. a kind of levigate metallurgical slag according to claim 1 and levigate quartz sand and flyash three components are mixed the production technology of high-strength pipe pile again, and its described feature is: centrifuging process control: the acceleration of gravity that initial velocity is 2～5 times, 1～3 minute time; The acceleration of gravity that low speed is 10～15 times, 2～6 minutes time; The acceleration of gravity that middling speed is 20～30 times, 2～8 minutes time; The acceleration of gravity that high speed is 35～50 times, 5～12 minutes time.
4. a kind of levigate metallurgical slag according to claim 1 and levigate quartz sand and flyash three components are mixed the production technology of high-strength pipe pile again, and its described feature is: the atmospheric steam curing that carries out 70 ℃～100 ℃, 4 hours～10 hours behind the centrifugal operation.
5. a kind of levigate metallurgical slag according to claim 1 and levigate quartz sand and flyash three components are mixed the production technology of high-strength pipe pile again, its described feature is: when producing the PHC pile tube, the pile tube behind the atmospheric steam curing sent into carry out 160 ℃～200 ℃, 4 hours～12 hours autoclave curing in the still kettle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100870485A CN101249696A (en) | 2008-03-27 | 2008-03-27 | Production technology of high-strength pipe pile by combined admixture of ground granulated metallurgical slag and ground granulated quartz sand as well as coal ash |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100870485A CN101249696A (en) | 2008-03-27 | 2008-03-27 | Production technology of high-strength pipe pile by combined admixture of ground granulated metallurgical slag and ground granulated quartz sand as well as coal ash |
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| Publication Number | Publication Date |
|---|---|
| CN101249696A true CN101249696A (en) | 2008-08-27 |
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| CNA2008100870485A Pending CN101249696A (en) | 2008-03-27 | 2008-03-27 | Production technology of high-strength pipe pile by combined admixture of ground granulated metallurgical slag and ground granulated quartz sand as well as coal ash |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101581095B (en) * | 2009-06-11 | 2012-01-25 | 福建省大地管桩有限公司 | Anti-corrosive pre-stressed concrete pipe pile foundation |
| CN110144880A (en) * | 2019-05-28 | 2019-08-20 | 连云港晟宇新型建材有限公司 | A kind of prestressed high-strength concrete pile and preparation method thereof of non-evaporating pressure |
-
2008
- 2008-03-27 CN CNA2008100870485A patent/CN101249696A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101581095B (en) * | 2009-06-11 | 2012-01-25 | 福建省大地管桩有限公司 | Anti-corrosive pre-stressed concrete pipe pile foundation |
| CN110144880A (en) * | 2019-05-28 | 2019-08-20 | 连云港晟宇新型建材有限公司 | A kind of prestressed high-strength concrete pile and preparation method thereof of non-evaporating pressure |
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Application publication date: 20080827 |