CN105130308A - Prestress concrete tubular pile free of steaming and pressing - Google Patents
Prestress concrete tubular pile free of steaming and pressing Download PDFInfo
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- CN105130308A CN105130308A CN201510546910.4A CN201510546910A CN105130308A CN 105130308 A CN105130308 A CN 105130308A CN 201510546910 A CN201510546910 A CN 201510546910A CN 105130308 A CN105130308 A CN 105130308A
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Abstract
Provided is a prestress concrete tubular pile free of steaming and pressing. Each cubic meter of concrete contains 420-480 kg of gel materials, the water-binder ratio is 0.24-0.26, and the sand ratio is 30-33%. Crushed stone is broken cobblestone, and each cubic meter of concrete contains 1250-1350 kg of the cobblestone. Doped water reducers account for 1.5%-2.0% of the gel materials. The gel materials are prepared from, by mass, 20-30% of superfine slag powder, 5-7% of carbide slag, 5-10% of micro silicon powder, 5-7% of gypsum powder and the balance cement. The comprehensive performance of the tubular pile is fully improved while the quality of the PHC tubular pile is guaranteed; meanwhile, the technology process is simplified, steam consumption in the pile making process is reduced; use of hoisting equipment required when the pile enters and gets out of an autoclave is reduced, and electric energy consumption is correspondingly reduced.
Description
Technical field
The invention belongs to building material technical field, be specifically related to a kind of non-evaporating pressure prestressed concrete pipe pile.
Background technology
Along with the fast development of engineering construction technology, and the continuous renewal of foundation treatment engineering construction technology and mechanical means, high-strength concrete prestress static pressure pipe pile is used widely in the basement process of big and medium-sized cities high building project; Current domestic production adopts (the initial stage steam-cured guarantee demoulding of the steam-cured mode of secondary, second phase high-pressure steaming and cultivating ensures concrete strength), steam press maintenance is the operation maximum with the energy consuming time, in general, for oil-firing boiler, every steam pressure 1 cubic meter of concrete oil consumption 25Kg, and the power consumption time is long; In addition steam press maintenance needs autoclave, and input ratio is higher, and time pile tube goes out autoclave, temperature is higher, if do not use special protection, causes pile pipe crack; Disadvantageous effect is brought to pile tube weather resistance.
Summary of the invention
Object of the present invention is just to provide a kind of non-evaporating pressure prestressed concrete pipe pile and its preparation method for solving the deficiencies in the prior art.
The object of the invention is with following technical proposals realize:
A kind of non-evaporating pressure prestressed concrete pipe pile, described tubular pile concrete is made up of gelling material, sand, rubble, water reducer and water, and wherein every cubic meter of concrete contains gelling material 420-480kg, and water-cement ratio is 0.24-0.26, and sand coarse aggregate ratio is 30-33%; Rubble is broken pebbles, and wherein every cubic meter of concrete contains 1250-1350kg; Water reducer volume is the 1.5-2.0% of gelling material; Gelling material is made up of cement, slag micropowder, carbide slag, SILICA FUME and terra alba; In described gelling material, the mass ratio of slag micropowder is 20-30%, carbide slag is 5-7%, SILICA FUME 5-10%, terra alba 5-7%, and surplus is cement.
Described broken pebbles particle diameter is 5-25mm, and crush index is 7-7.5%, and elongated particles is less than 3%, and silt content is not more than 0.5%, and apparent density is 2500-2700Kg/m
3, tap density is 1400-1500Kg/m
3,compactness densities is 1550-1650Kg/m
3.
The fineness of sand is 2.6-3.2, and silt content is not more than 1.0%.
Described water reducer is polycarboxylate water-reducer, and water-reducing rate is not less than 25%, and air content is not higher than 3%.
Described cement is P II 52.5 type, and slag micropowder is S95 type.
The described tubular pile concrete slump is 3-5cm.
The preparation method of non-evaporating pressure prestressed concrete pipe pile as above, is characterized in that comprising the following steps:
1) concrete-agitating, feeding enters mould, matched moulds, stretch-draw;
2) centrifugal forming: rotary process is four-stage: pipe die speed is respectively low speed 70-80 rev/min, 2-3 minute; Low-medium speed 180-200 rev/min, 1.5-2.5 minute; Middling speed 280-300 rev/min, 1.5-2.5 minute; High speed 420-450 rev/min, 4-6 minute;
3) normal pressure is steam-cured: steam-cured at the uniform velocity to rise to 95-100 DEG C of heating-up time by room temperature be 1.5-2.5h, and keep 95-100 DEG C of 5-6h, temperature fall time is 20-35min;
4) demoulding, natural curing 3-7 days.
Step 2) in rotary process be divided into: low speed 70-80 rev/min, 2.5 minutes; Low-medium speed 180-200 rev/min, 2 minutes; Middling speed 280-300 rev/min, 2 minutes; High speed 420-450 rev/min, 5 minutes.
Because unreasonable, the large slump of raw material grating and the improper concrete delamination that causes of centrifuging process are the major reasons that concrete tubular pile ftractures, non-evaporating pressure prestressed concrete pipe pile provided by the invention, adopt broken pebbles as coarse aggregate, its grating is reasonable, particle shape is good, elongated particles is few, fillibility between coarse aggregate is good, addition 1300-1500kg, such coarse aggregate is evenly distributed in concrete, decrease the spacing between coarse aggregate, reduce sedimentation contraction and the self-constriction of concrete itself; Add carbide slag, SILICA FUME, terra alba, synergistic agent simultaneously, further optimizing materials grain composition, improve concrete strength, experiment again through science is improved centrifuging process, improves the rotating speed of centrifuging process high speed, ensures minimum remaining pulp layer, increase concrete layer, make the concrete tubular pile of production need not carry out reaching more than 85MPa after 80Mpa, natural curing 1-3 days when high-pressure steaming and cultivating can make intensity reach the demoulding, fracture resistance, erosion resistance are further enhanced simultaneously.Therefore the present invention not only improves the over-all properties of pile tube while ensureing PHC pile tube quality comprehensively, simplification of flowsheet simultaneously, considerably reduce the consumption of steam in stake process processed, decrease the use of weight handling equipment needed for turnover autoclave simultaneously, also correspondingly decrease power consumption.
Embodiment
embodiment 1
A kind of non-evaporating pressure prestressed concrete pipe pile, tubular pile concrete is made up of gelling material, sand, rubble, water reducer and water, and wherein every cubic meter of concrete contains 420-480kg gelling material, and water-cement ratio is 0.24-0.26, and sand coarse aggregate ratio is 30-33%; Rubble is broken pebbles, and particle diameter is 5-25mm, and wherein every cubic meter of concrete contains 1300-1500kg; Water reducer volume is the 1-2% of gelling material; Gelling material is made up of cement, slag micropowder, carbide slag, SILICA FUME and terra alba; In gelling material, the mass ratio of slag micropowder is 20-30%, carbide slag is 5-7%, SILICA FUME 5-10%, terra alba 5-7%, and surplus is cement.
Broken pebbles breaking indices is 7-7.5%, and elongated particles is less than 3%, and silt content is not more than 0.5%, and not containing clod, apparent density is 2500-2700Kg/m
3, tap density is 1400-1500Kg/m
3, compactness densities is 1550-1650Kg/m
3; Sand meets the requirement of natural one-level sand, fineness modulus 2.6-3.2, and silt content is not more than 1.0%, not containing clod; Water reducer is polycarboxylate water-reducer, and water-reducing rate is not less than 25%, and air content is not higher than 3%.
Cement is P II 52.5 type, and within 3 days, folding strength reaches 4.5MPa, and within 28 days, folding strength reaches 7.5MPa, within 3 days, intensity reaches 32MPAa, and within 28 days, intensity reaches 56MPa, and cement just final setting time controls at 2-2.5 hour, final setting time controls at 3-3.5 hour, and cement specific surface area controls at 350-370m
2/ kg; Slag micropowder is S95 type; Adopt 1 rank, activity index reaches 85% in 3 days, within 7 days, reaches 100%, within 28 days, reaches 115%; Loss on ignition is less than or equal to 3%; Terra alba fineness is 200 orders; Carbide slag calcium oxide content is greater than 55%.
The tubular pile concrete slump is 3-5cm.
The preparation method of described non-evaporating pressure prestressed concrete pipe pile, comprises the following steps:
1) concrete-agitating, feeding enters mould, matched moulds, stretch-draw;
2) centrifugal forming: rotary process is divided into 4 stages, and the pipe speed of touching is respectively low speed 70-80 rev/min, 2-3 minute; Low-medium speed 180-200 rev/min, 1.5-2.5 minute; Middling speed 280-300 rev/min, 1.5-2.5 minute; High speed 420-450 rev/min, 4-6 minute;
3) normal pressure is steam-cured: steam-cured at the uniform velocity to rise to 95-100 DEG C of heating-up time by room temperature be 1.5-2.5h, and keep 95-100 DEG C of 4-5h, temperature fall time is 20-35min;
4) demoulding, natural curing 3-7 days.
embodiment 2
A kind of non-evaporating pressure prestressed concrete pipe pile, described tubular pile concrete is made up of gelling material, sand, rubble, water reducer and water, and wherein every cubic meter of concrete contains 440kg gelling material, and water-cement ratio is 0.25, and sand coarse aggregate ratio is 32%; Rubble is broken pebbles, and particle diameter is 5-25mm, and wherein every cubic meter of concrete contains 1300kg; Water reducer volume is 2% of gelling material; Gelling material is made up of cement, slag micropowder, carbide slag, SILICA FUME and terra alba; In described gelling material, the mass ratio of slag micropowder is 25%, carbide slag is 6%, SILICA FUME 8%, terra alba 6%, and surplus is cement.
Described broken pebbles breaking indices is 7-7.5%, and elongated particles is less than 3%, and silt content is not more than 0.5%, clod content 0%, and apparent density is 2500-2700Kg/m
3, tap density is 1400-1500Kg/m
3, compactness densities is 1550-1650Kg/m
3; Described sand meets the requirement of natural one-level sand, fineness 2.6-3.2, and silt content is not more than 1.0%, clod content 0%; Described water reducer is polycarboxylate water-reducer, and water-reducing rate is not less than 25%, and air content is not higher than 3%.
Described cement is P II 52.5 type, within 3 days, folding strength reaches 4.5MPa, within 28 days, folding strength reaches 7.5MPa, within 3 days, intensity reaches 32MPAa, within 28 days, intensity reaches 56MPa, cement just final setting time controls at 2-2.5 hour, and final setting time controls at 3-3.5 hour, and cement specific surface area controls at 350-370m
2/ kg; Slag micropowder is S95 type; Adopt 1 rank, activity index reaches 85% in 3 days, within 7 days, reaches 100%, within 28 days, reaches 115%; Loss on ignition is less than or equal to 3%; Terra alba fineness is 200 orders; Carbide slag calcium oxide content is greater than 55%.
The described tubular pile concrete slump is 3-5cm.
The preparation method of described non-evaporating pressure prestressed concrete pipe pile, comprises the following steps:
1) concrete-agitating, feeding enters mould, matched moulds, stretch-draw;
2) centrifugal forming: rotary process is low speed 75 revs/min, 2.5 minutes; Low-medium speed 190 revs/min, 2 minutes; Middling speed 290 revs/min, 2 minutes; 430 revs/min at a high speed, 5 minutes;
3) normal pressure is steam-cured: steam-cured at the uniform velocity to rise to 95 DEG C of heating-up times by room temperature be 2h, and keep 95 DEG C of 5h, temperature fall time is 30min;
4) demoulding, natural curing 5 days.
87MPa is reached after 80Mpa, natural curing 1-3 days when intensity reaches the demoulding.
embodiment 3
A kind of non-evaporating pressure prestressed concrete pipe pile, described tubular pile concrete is made up of gelling material, sand, rubble, water reducer and water, and wherein every cubic meter of concrete contains 430kg gelling material, and water-cement ratio is 0.24, and sand coarse aggregate ratio is 30%; Rubble is broken pebbles, and wherein every cubic meter of concrete contains 1350kg; Water reducer volume is 1.5% of gelling material; Gelling material is made up of cement, slag micropowder, carbide slag, SILICA FUME and terra alba; In described gelling material, the mass ratio of slag micropowder is 20%, carbide slag is 7%, SILICA FUME 6%, terra alba 5%, and surplus is cement.
The preparation method of described non-evaporating pressure prestressed concrete pipe pile, comprises the following steps:
1) concrete-agitating, feeding enters mould, matched moulds, stretch-draw;
2) centrifugal forming: rotary process is low speed 80 revs/min, 2 minutes; Low-medium speed 200 revs/min, 1.5 minutes; Middling speed 280 revs/min, 2 minutes; 440 revs/min at a high speed, 4 minutes;
3) normal pressure is steam-cured: steam-cured at the uniform velocity to rise to 100 DEG C of heating-up times by room temperature be 2.5h, and keep 100 DEG C of 4h, temperature fall time is 35min;
4) demoulding, natural curing 6 days; Other are with embodiment 2.
85MPa is reached after 81Mpa, natural curing 1-3 days when intensity reaches the demoulding.
embodiment 4
A kind of non-evaporating pressure prestressed concrete pipe pile, described tubular pile concrete is made up of gelling material, sand, rubble, water reducer and water, and wherein every cubic meter of concrete contains 480kg gelling material, and water-cement ratio is 0.26, and sand coarse aggregate ratio is 33%; Rubble is broken pebbles, and wherein every cubic meter of concrete contains 1500kg; Water reducer volume is 1% of gelling material; Gelling material is made up of cement, slag micropowder, carbide slag, SILICA FUME and terra alba; In described gelling material, the mass ratio of slag micropowder is 28%, carbide slag is 5%, SILICA FUME 9%, terra alba 7%, and surplus is cement.
The preparation method of described non-evaporating pressure prestressed concrete pipe pile, comprises the following steps:
1) concrete-agitating, feeding enters mould, matched moulds, stretch-draw;
2) centrifugal forming: rotary process is low speed 70 revs/min, 3 minutes; Low-medium speed 180 revs/min, 2.5 minutes; Middling speed 300 revs/min, 1.5 minutes; 420 revs/min at a high speed, 6 minutes;
3) normal pressure is steam-cured: steam-cured at the uniform velocity to rise to 98 DEG C of heating-up times by room temperature be 1.5h, and keep 98 DEG C of 4h, temperature fall time is 25min;
4) demoulding, natural curing 4 days; Other are with embodiment 2.
88MPa is reached after 80Mpa, natural curing 1-3 days when intensity reaches the demoulding.
embodiment 5
A kind of non-evaporating pressure prestressed concrete pipe pile, described tubular pile concrete is made up of gelling material, sand, rubble, water reducer and water, and wherein every cubic meter of concrete contains 420kg gelling material, and water-cement ratio is 0.26, and sand coarse aggregate ratio is 31%; Rubble is broken pebbles, and wherein every cubic meter of concrete contains 1400kg; Water reducer volume is 1.2% of gelling material; Gelling material is made up of cement, slag micropowder, carbide slag, SILICA FUME and terra alba; In described gelling material, the mass ratio of slag micropowder is 30%, carbide slag is 5.5%, SILICA FUME 5%, terra alba 7%, and surplus is cement.
The preparation method of described non-evaporating pressure prestressed concrete pipe pile, comprises the following steps:
1) concrete-agitating, feeding enters mould, matched moulds, stretch-draw;
2) centrifugal forming: rotary process is low speed 80 revs/min, 2.5 minutes; Low-medium speed 200 revs/min, 2 minutes; Middling speed 280 revs/min, 2 minutes; 450 revs/min at a high speed, 5 minutes;
3) normal pressure is steam-cured: steam-cured at the uniform velocity to rise to 96 DEG C of heating-up times by room temperature be 2h, and keep 96 DEG C of 4h, temperature fall time is 20min;
4) demoulding, natural curing 3 days; Other are with embodiment 2.
embodiment 6
A kind of non-evaporating pressure prestressed concrete pipe pile, described tubular pile concrete is made up of gelling material, sand, rubble, water reducer and water, and wherein every cubic meter of concrete contains 450kg gelling material, and water-cement ratio is 0.25, and sand coarse aggregate ratio is 30%; Rubble is broken pebbles, and wherein every cubic meter of concrete contains 1450kg; Water reducer volume is 1.8% of gelling material; Gelling material is made up of cement, slag micropowder, carbide slag, SILICA FUME and terra alba; In described gelling material, the mass ratio of slag micropowder is 22%, carbide slag is 6.5%, SILICA FUME 10%, terra alba 6.5%, and surplus is cement.
The preparation method of described non-evaporating pressure prestressed concrete pipe pile, comprises the following steps:
1) concrete-agitating, feeding enters mould, matched moulds, stretch-draw;
2) centrifugal forming: rotary process is low speed 70 revs/min, 2 minutes; Low-medium speed 180 revs/min, 1.5 minutes; Middling speed 300 revs/min, 1.5 minutes; 420 revs/min at a high speed, 6 minutes;
3) normal pressure is steam-cured: steam-cured at the uniform velocity to rise to 97 DEG C of heating-up times by room temperature be 2.5h, and keep 97 DEG C of 4.5h, temperature fall time is 35min;
4) demoulding, natural curing 7 days; Other are with embodiment 2.
embodiment 7
A kind of non-evaporating pressure prestressed concrete pipe pile, described tubular pile concrete is made up of gelling material, sand, rubble, water reducer and water, and wherein every cubic meter of concrete contains 460kg gelling material, and water-cement ratio is 0.24, and sand coarse aggregate ratio is 33%; Rubble is broken pebbles, and wherein every cubic meter of concrete contains 1300kg; Water reducer volume is 2% of gelling material; Gelling material is made up of cement, slag micropowder, carbide slag, SILICA FUME and terra alba; In described gelling material, the mass ratio of slag micropowder is 21%, carbide slag is 5%, SILICA FUME 5%, terra alba 5.5%, and surplus is cement.
The preparation method of described non-evaporating pressure prestressed concrete pipe pile, comprises the following steps:
1) concrete-agitating, feeding enters mould, matched moulds, stretch-draw;
2) centrifugal forming: rotary process is low speed 80 revs/min, 2 minutes; Low-medium speed 190 revs/min, 2 minutes; Middling speed 280 revs/min, 2 minutes; 430 revs/min at a high speed, 5 minutes;
3) normal pressure is steam-cured: steam-cured at the uniform velocity to rise to 99 DEG C of heating-up times by room temperature be 2h, and keep 99 DEG C of 4h, temperature fall time is 30min;
4) demoulding, natural curing 6 days; Other are with embodiment 2.
embodiment 8
A kind of non-evaporating pressure prestressed concrete pipe pile, described tubular pile concrete is made up of gelling material, sand, rubble, water reducer and water, and wherein every cubic meter of concrete contains 470kg gelling material, and water-cement ratio is 0.26, and sand coarse aggregate ratio is 30%; Rubble is broken pebbles, and wherein every cubic meter of concrete contains 1500kg; Water reducer volume is 1.5% of gelling material; Gelling material is made up of cement, slag micropowder, carbide slag, SILICA FUME and terra alba; In described gelling material, the mass ratio of slag micropowder is 29%, carbide slag is 6%, SILICA FUME 10%, terra alba 5%, and surplus is cement.
The preparation method of described non-evaporating pressure prestressed concrete pipe pile, comprises the following steps:
1) concrete-agitating, feeding enters mould, matched moulds, stretch-draw;
2) centrifugal forming: rotary process is low speed 80 revs/min, 3 minutes; Low-medium speed 200 revs/min, 2.5 minutes; Middling speed 280 revs/min, 1.5 minutes; 450 revs/min at a high speed, 6 minutes;
3) normal pressure is steam-cured: steam-cured at the uniform velocity to rise to 95 DEG C of heating-up times by room temperature be 2h, and keep 95 DEG C of 4h, temperature fall time is 30min;
4)the demoulding, natural curing 5 days; Other are with embodiment 2.
Claims (8)
1. a non-evaporating pressure prestressed concrete pipe pile, it is characterized in that: described tubular pile concrete is made up of gelling material, sand, rubble, water reducer and water, wherein every cubic meter of concrete contains gelling material 420-480kg, and water-cement ratio is 0.24-0.26, and sand coarse aggregate ratio is 30-33%; Rubble is broken pebbles, and wherein every cubic meter of concrete contains 1250-1350kg; Water reducer volume is the 1.5-2.0% of gelling material; Gelling material is made up of cement, slag micropowder, carbide slag, SILICA FUME and terra alba; In described gelling material, the mass ratio of slag micropowder is 20-30%, carbide slag is 5-7%, SILICA FUME 5-10%, terra alba 5-7%, and surplus is cement.
2. non-evaporating pressure prestressed concrete pipe pile as claimed in claim 1, is characterized in that: described broken pebbles particle diameter is 5-25mm, and crush index is 7-7.5%, and elongated particles is less than 3%, and silt content is not more than 0.5%, and apparent density is 2500-2700Kg/m
3, tap density is 1400-1500Kg/m
3,compactness densities is 1550-1650Kg/m
3.
3. non-evaporating pressure prestressed concrete pipe pile as claimed in claim 1, is characterized in that: the fineness of sand is 2.6-3.2, and silt content is not more than 1.0%.
4. non-evaporating pressure prestressed concrete pipe pile as claimed in claim 1, it is characterized in that: described water reducer is polycarboxylate water-reducer, and water-reducing rate is not less than 25%, air content is not higher than 3%.
5. non-evaporating pressure prestressed concrete pipe pile as claimed in claim 1, is characterized in that: described cement is P II 52.5 type, and slag micropowder is S95 type.
6. non-evaporating pressure prestressed concrete pipe pile as claimed in claim 1, is characterized in that: the described tubular pile concrete slump is 3-5cm.
7. the preparation method of the non-evaporating pressure prestressed concrete pipe pile as described in any one of claim 1-6, is characterized in that comprising the following steps:
1) concrete-agitating, feeding enters mould, matched moulds, stretch-draw;
2) centrifugal forming: rotary process is four-stage: pipe die speed is respectively low speed 70-80 rev/min, 2-3 minute; Low-medium speed 180-200 rev/min, 1.5-2.5 minute; Middling speed 280-300 rev/min, 1.5-2.5 minute; High speed 420-450 rev/min, 4-6 minute;
3)normal pressure is steam-cured: steam-cured at the uniform velocity to rise to 95-100 DEG C of heating-up time by room temperature be 1.5-2.5h, and keep 95-100 DEG C of 5-6h, temperature fall time is 20-35min;
4) demoulding, natural curing 3-7 days.
8. the preparation method of non-evaporating pressure prestressed concrete pipe pile as claimed in claim 7, is characterized in that step 2) in rotary process be divided into: low speed 70-80 rev/min, 2.5 minutes; Low-medium speed 180-200 rev/min, 2 minutes; Middling speed 280-300 rev/min, 2 minutes; High speed 420-450 rev/min, 5 minutes.
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| CN105884287A (en) * | 2016-04-11 | 2016-08-24 | 天津港航桩业有限公司 | Non-autoclaved precast tubular pile and preparation method thereof |
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| CN107382206A (en) * | 2017-08-18 | 2017-11-24 | 杨小英 | A kind of preparation method of prestressed high-strength concrete pile |
| CN107487998A (en) * | 2017-08-18 | 2017-12-19 | 杨小英 | Prestressed high-strength concrete pile additive |
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| 巴恒静: "集料物性对商品混凝土早期自收缩的影响", 《商品混凝土》 * |
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| CN105884287A (en) * | 2016-04-11 | 2016-08-24 | 天津港航桩业有限公司 | Non-autoclaved precast tubular pile and preparation method thereof |
| CN105818265A (en) * | 2016-04-22 | 2016-08-03 | 东南大学 | Steam-curing-free prestressed high-strength concrete centrifugal pipe pile material and preparing method thereof |
| CN106588039A (en) * | 2016-11-05 | 2017-04-26 | 余贤祥 | Cement rotary kiln body bottom layer castable |
| CN107352919A (en) * | 2017-08-18 | 2017-11-17 | 杨小英 | Prestressed high-strength concrete pile |
| CN107382206A (en) * | 2017-08-18 | 2017-11-24 | 杨小英 | A kind of preparation method of prestressed high-strength concrete pile |
| CN107487998A (en) * | 2017-08-18 | 2017-12-19 | 杨小英 | Prestressed high-strength concrete pile additive |
| CN114133201A (en) * | 2021-12-30 | 2022-03-04 | 湖北工业大学 | Multi-scale solid waste modified phosphorus building gypsum composite cementing material |
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| CN105130308B (en) | 2017-03-29 |
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