CN104030619A - Steel tube concrete - Google Patents
Steel tube concrete Download PDFInfo
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- CN104030619A CN104030619A CN201410214228.0A CN201410214228A CN104030619A CN 104030619 A CN104030619 A CN 104030619A CN 201410214228 A CN201410214228 A CN 201410214228A CN 104030619 A CN104030619 A CN 104030619A
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Abstract
The invention relates to a steel tube concrete. The concrete contains a self-compacting concrete of which the strength grade is C35-C50 and an expanding agent and is injected into constructed steel tubes under the working pressure of 10-16MPa by adopting a pumping and jacking casting process, and an overflow pressure relief hole or an exhaust pressure relief hole is formed in the top end of each steel tube column; the adding quantity of the expanding agent is 6-8% of the weight of the self-compacting concrete; the self-compacting concrete is obtained by mixing cement, an admixture, a water reducing agent, a fine aggregate and a coarse aggregate in a weight ratio of 1kg: (0.17-0.25)kg: (0.022-0.025)kg: (1.5-2.4)kg: (2.1-3.3)kg with per cubic meter of concrete and then stirring uniformly according to a conventional method, and the water-cement ratio of the self-compacting concrete is 0.44-0.48. The steel tube concrete can be used for effectively reducing the labor intensity, shortening the construction period and improving the efficiency.
Description
Technical field
The present invention relates to a kind of concrete with property, relate in particular to concrete filled steel tube.
Background technology
Concrete ultimate compression strength is high, but resistance to bend is very weak, and too large for elevated structure concrete own wt, and building safety coefficient is reduced; For steel, particularly shaped steel resistance to bend is strong, has good elastoplasticity, but when pressurized easy loss of stability and lose axial compression resistance ability.Therefore the concrete filled steel tube that invents of the performance of bi-material being combined has the mechanical property advantage of above bi-material, anti-pressure ability is higher than concrete, and there is better elastoplasticity, be more suitable in industrial premises, high level and high-rise building, the inferior structure of bridge and ground.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of concrete filled steel tube that reduces labour intensity, shortens construction period, raises the efficiency.
For addressing the above problem, concrete filled steel tube of the present invention, it is characterized in that: the self-compacting concrete that it is C35 ~ C50 that this concrete refers to strength grade and swelling agent adopt pumping, jacking casting craft to be injected among the steel pipe of putting up with the operating pressure of 10 ~ 16MPa, and Steel Cylindrical Column top is provided with the concrete of overflow pressure relief vent or exhaust pressure relief vent; The addition of described swelling agent is 6 ~ 8% of described self-compacting concrete weight; Described self-compacting concrete refers to every 1m
3concrete is the concrete that the water cement ratio that forms is 0.44 ~ 0.48 that stirs according to a conventional method after kg:2.1 ~ 3.3, kg:1.5 ~ 2.4, kg:0.022 ~ 0.025,1kg:0.17 ~ 0.25 kg mixes by the weight ratio of cement, adulterant, water reducer, fine aggregate, coarse aggregate.
Described cement refers to that strength grade is the ordinary Portland cement of 42.5 grades.
Described fine aggregate is I class 2 district's medium coarse sands, and grain composition was the accumulative total screen over-size 0 ~ 10% of 5 ㎜ sieve apertures, the accumulative total screen over-size 10 ~ 50% of crossing 1.25 ㎜ sieve apertures, cross the accumulative total screen over-size 70 ~ 92% of 0.315 ㎜ sieve aperture, cross the sand of the accumulative total screen over-size 90 ~ 100% of 0.16 ㎜ sieve aperture.
Described coarse aggregate refers to that grain composition was that the accumulative total screen over-size 0 ~ 5% of 25mm sieve aperture, the accumulative total screen over-size 30 ~ 70% of crossing 16mm sieve aperture are, cross rubble or the cobble of the accumulative total screen over-size 90 ~ 100% of 5mm sieve aperture.
Described adulterant refers to the mixture that second class powered coal ash and breeze mix by 1 kg:1 kg.
Described water reducer refers to that aqua solid content is 30% naphthalene series high-efficiency water-reducing agent.
The present invention compared with prior art has the following advantages:
1, self-compacting concrete of the present invention can need not vibrate under deadweight, can be by the engineering position of intensive, the structural section more complicated of reinforcing bar, space in filling template keep self homogeneity and density voluntarily, form closely knit concrete structure, there is the labor force of saving, reduce labour intensity, shorten construction period, raise the efficiency, eliminate construction noise harm, improve the advantages such as environment.
2, the present invention is as a kind of novel texture between steel construction and skeleton construction, its core concrete is in triaxial stress state, steel pipe plays cuff effect, therefore can improve ultimate compression strength and the deformability of core concrete, have bearing capacity high, from heavy and light, plasticity is good, antifatigue is impacted, anti-seismic performance is good, corrosion resistance nature is better than steel construction, the anti-fire and anti-the fighting that are conducive to steel pipe can be given full play to the advantages such as mechanical property of bi-material.
3, the present invention mixes swelling agent, and making concrete inject after steel pipe that swelling agent swell increment just can compensating concrete shrinkage makes can not be gapped between concrete filled steel tube.
4, the present invention adopts < < self-compacting concrete utilisation technology rules > > (JGJ/T283-2012) to design to have that water-cement ratio is little, the slump large, the concrete of self-compacting ability, use jacking technique injects concrete among steel pipe, thereby form the concrete filled steel tube with property, be more suitable in industrial premises, high level and high-rise building, the inferior structure of bridge and ground.
Embodiment
embodiment 1concrete filled steel tube, the self-compacting concrete that it is C35 that this concrete refers to strength grade and swelling agent adopt pumping, jacking casting craft to be injected among the steel pipe of putting up with the operating pressure of 10MPa, and Steel Cylindrical Column top is provided with the concrete of overflow pressure relief vent or exhaust pressure relief vent.
Wherein: the addition of swelling agent is 6% of self-compacting concrete weight.
Self-compacting concrete refers to every 1m
3concrete is the concrete that the water cement ratio that forms is 0.48 that stirs according to a conventional method after 1 kg:0.25 kg:0.022 kg:2.4 kg:3.3kg mixes by the weight ratio of cement, adulterant, water reducer, fine aggregate, coarse aggregate.
embodiment 2concrete filled steel tube, the self-compacting concrete that it is C50 that this concrete refers to strength grade and swelling agent adopt pumping, jacking casting craft to be injected among the steel pipe of putting up with the operating pressure of 16MPa, and Steel Cylindrical Column top is provided with the concrete of overflow pressure relief vent or exhaust pressure relief vent.
Wherein: the addition of swelling agent is 8% of self-compacting concrete weight.
Self-compacting concrete refers to every 1m
3concrete is the concrete that the water cement ratio that forms is 0.45 that stirs according to a conventional method after 1 kg:0.17 kg:0.025 kg:1.5 kg:2.1kg mixes by the weight ratio of cement, adulterant, water reducer, fine aggregate, coarse aggregate.
embodiment 3concrete filled steel tube, the self-compacting concrete that it is C40 that this concrete refers to strength grade and swelling agent adopt pumping, jacking casting craft to be injected among the steel pipe of putting up with the operating pressure of 13MPa, and Steel Cylindrical Column top is provided with the concrete of overflow pressure relief vent or exhaust pressure relief vent.
Wherein: the addition of swelling agent is 7% of self-compacting concrete weight.
Self-compacting concrete refers to every 1m
3concrete is the concrete that the water cement ratio that forms is 0.44 that stirs according to a conventional method after 1kg:0.25kg:0.023kg:2.0kg:2.8kg mixes by the weight ratio of cement, adulterant, water reducer, fine aggregate, coarse aggregate.
embodiment 4concrete filled steel tube, the self-compacting concrete that it is C45 that this concrete refers to strength grade and swelling agent adopt pumping, jacking casting craft to be injected among the steel pipe of putting up with the operating pressure of 12MPa, and Steel Cylindrical Column top is provided with the concrete of overflow pressure relief vent or exhaust pressure relief vent.
Wherein: the addition of swelling agent is 7.5% of self-compacting concrete weight.
Self-compacting concrete refers to every 1m
3concrete is the concrete that the water cement ratio that forms is 0.45 that stirs according to a conventional method after 1kg:0.20kg:0.024kg:1.7kg:2.4kg mixes by the weight ratio of cement, adulterant, water reducer, fine aggregate, coarse aggregate.
Above-mentioned
embodiment 1 ~ 4in, cement refers to that strength grade is the ordinary Portland cement of 42.5 grades.
Fine aggregate is I class 2 district's medium coarse sands, and grain composition was the accumulative total screen over-size 0 ~ 10% of 5 ㎜ sieve apertures, the accumulative total screen over-size 10 ~ 50% of crossing 1.25 ㎜ sieve apertures, cross the accumulative total screen over-size 70 ~ 92% of 0.315 ㎜ sieve aperture, cross the sand of the accumulative total screen over-size 90 ~ 100% of 0.16 ㎜ sieve aperture.
Coarse aggregate refers to that grain composition was that the accumulative total screen over-size 0 ~ 5% of 25mm sieve aperture, the accumulative total screen over-size 30 ~ 70% of crossing 16mm sieve aperture are, cross rubble or the cobble of the accumulative total screen over-size 90 ~ 100% of 5mm sieve aperture.
Adulterant refers to the mixture that second class powered coal ash and breeze mix by 1 kg:1 kg.
Water reducer refers to that aqua solid content is 30% naphthalene series high-efficiency water-reducing agent.
In pumping, jacking casting craft, the operating pressure of concrete pump is 10 ~ 16MPa, and concrete delivery pipe is provided with the fluid stopping device of a flashboard type or wedge anchorage formula.
Claims (6)
1. concrete filled steel tube, it is characterized in that: the self-compacting concrete that it is C35 ~ C50 that this concrete refers to strength grade and swelling agent adopt pumping, jacking casting craft to be injected among the steel pipe of putting up with the operating pressure of 10 ~ 16MPa, and Steel Cylindrical Column top is provided with the concrete of overflow pressure relief vent or exhaust pressure relief vent; The addition of described swelling agent is 6 ~ 8% of described self-compacting concrete weight; Described self-compacting concrete refers to every 1m
3concrete is the concrete that the water cement ratio that forms is 0.44 ~ 0.48 that stirs according to a conventional method after kg:2.1 ~ 3.3, kg:1.5 ~ 2.4, kg:0.022 ~ 0.025,1kg:0.17 ~ 0.25 kg mixes by the weight ratio of cement, adulterant, water reducer, fine aggregate, coarse aggregate.
2. concrete filled steel tube as claimed in claim 1, is characterized in that: described cement refers to that strength grade is the ordinary Portland cement of 42.5 grades.
3. concrete filled steel tube as claimed in claim 1, it is characterized in that: described fine aggregate is I class 2 district's medium coarse sands, grain composition was the accumulative total screen over-size 0 ~ 10% of 5 ㎜ sieve apertures, the accumulative total screen over-size 10 ~ 50% of crossing 1.25 ㎜ sieve apertures, cross the accumulative total screen over-size 70 ~ 92% of 0.315 ㎜ sieve aperture, cross the sand of the accumulative total screen over-size 90 ~ 100% of 0.16 ㎜ sieve aperture.
4. concrete filled steel tube as claimed in claim 1, is characterized in that: described coarse aggregate refers to that grain composition was the accumulative total screen over-size 0 ~ 5% of 25mm sieve aperture, cross the accumulative total screen over-size 30 ~ 70% of 16mm sieve aperture, cross rubble or the cobble of the accumulative total screen over-size 90 ~ 100% of 5mm sieve aperture.
5. concrete filled steel tube as claimed in claim 1, is characterized in that: described adulterant refers to the mixture that second class powered coal ash and breeze mix by 1 kg:1 kg.
6. concrete filled steel tube as claimed in claim 1, is characterized in that: described water reducer refers to that aqua solid content is 30% naphthalene series high-efficiency water-reducing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410214228.0A CN104030619A (en) | 2014-05-21 | 2014-05-21 | Steel tube concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410214228.0A CN104030619A (en) | 2014-05-21 | 2014-05-21 | Steel tube concrete |
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| CN104030619A true CN104030619A (en) | 2014-09-10 |
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| CN201410214228.0A Pending CN104030619A (en) | 2014-05-21 | 2014-05-21 | Steel tube concrete |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104478307A (en) * | 2014-11-19 | 2015-04-01 | 鞍钢房产建设有限公司 | High-strength special concrete-filled steel tube |
| CN104987018A (en) * | 2015-07-21 | 2015-10-21 | 嘉华特种水泥股份有限公司 | Self-compacting concrete |
| CN106082873A (en) * | 2016-06-22 | 2016-11-09 | 沈阳建筑大学 | A kind of concrete filled steel tube regenerated coarse aggregate substitutes stone C50 concrete entirely |
| CN106478022A (en) * | 2016-10-13 | 2017-03-08 | 沈阳建筑大学 | A kind of clay being applied to concrete filled steel tube substitutes sand C40 concrete entirely |
| CN108375513A (en) * | 2018-01-23 | 2018-08-07 | 中国石油大学(华东) | A kind of perforating job broken rock experimental method |
| CN110698128A (en) * | 2019-11-04 | 2020-01-17 | 重庆泰安装饰设计工程有限公司 | Concrete and preparation process thereof |
Citations (4)
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| CN101428991A (en) * | 2008-12-22 | 2009-05-13 | 中铁二局股份有限公司 | Self-compaction concrete |
| JP4425570B2 (en) * | 2003-06-10 | 2010-03-03 | 鹿島建設株式会社 | Construction method of underground impermeable walls |
| CN102030507A (en) * | 2010-11-19 | 2011-04-27 | 天津城市建设学院 | Self-compacting micro-expanded steel tube concrete |
| CN102060481A (en) * | 2010-11-15 | 2011-05-18 | 北京新奥混凝土集团有限公司 | Low cementitious material self-compacting concrete |
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2014
- 2014-05-21 CN CN201410214228.0A patent/CN104030619A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4425570B2 (en) * | 2003-06-10 | 2010-03-03 | 鹿島建設株式会社 | Construction method of underground impermeable walls |
| CN101428991A (en) * | 2008-12-22 | 2009-05-13 | 中铁二局股份有限公司 | Self-compaction concrete |
| CN102060481A (en) * | 2010-11-15 | 2011-05-18 | 北京新奥混凝土集团有限公司 | Low cementitious material self-compacting concrete |
| CN102030507A (en) * | 2010-11-19 | 2011-04-27 | 天津城市建设学院 | Self-compacting micro-expanded steel tube concrete |
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| 严新华: "自密实混凝土在钢桁架拱桥中的研究及应用", 《商品混凝土》, 15 November 2009 (2009-11-15) * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104478307A (en) * | 2014-11-19 | 2015-04-01 | 鞍钢房产建设有限公司 | High-strength special concrete-filled steel tube |
| CN104987018A (en) * | 2015-07-21 | 2015-10-21 | 嘉华特种水泥股份有限公司 | Self-compacting concrete |
| CN104987018B (en) * | 2015-07-21 | 2017-11-03 | 嘉华特种水泥股份有限公司 | A kind of self-compacting concrete |
| CN106082873A (en) * | 2016-06-22 | 2016-11-09 | 沈阳建筑大学 | A kind of concrete filled steel tube regenerated coarse aggregate substitutes stone C50 concrete entirely |
| CN106478022A (en) * | 2016-10-13 | 2017-03-08 | 沈阳建筑大学 | A kind of clay being applied to concrete filled steel tube substitutes sand C40 concrete entirely |
| CN108375513A (en) * | 2018-01-23 | 2018-08-07 | 中国石油大学(华东) | A kind of perforating job broken rock experimental method |
| CN110698128A (en) * | 2019-11-04 | 2020-01-17 | 重庆泰安装饰设计工程有限公司 | Concrete and preparation process thereof |
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Application publication date: 20140910 |