CN103922660A - Shrinkage-free ultrahigh-strength grouting material for connection of steel bar sleeves - Google Patents
Shrinkage-free ultrahigh-strength grouting material for connection of steel bar sleeves Download PDFInfo
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- CN103922660A CN103922660A CN201410093760.1A CN201410093760A CN103922660A CN 103922660 A CN103922660 A CN 103922660A CN 201410093760 A CN201410093760 A CN 201410093760A CN 103922660 A CN103922660 A CN 103922660A
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- superelevation
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- injection material
- reinforced bar
- bar sleeve
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Abstract
The invention discloses a shrinkage-free ultrahigh-strength grouting material for connection of steel bar sleeves. The grouting material comprises, by weight, 25 to 45% of Portland cement, 5 to 20% of grade-I fly ash, 2 to 10% of silicon ash, 0.3 to 1% of an early-stage expanding agent, 2 to 10% of a middle-and-later-stage expanding agent, 0.2 to 0.5% of an antifoaming agent, 0.5 to 1.5% of a high-efficiency water reducer and 35 to 50% of quartz sand, wherein a water-binder ratio is 0.16 to 0.18. The grouting material provided by the invention has the advantages of high fluidity, high early-stage and later-stage strength, no bleeding, no separation and layering, slight expansion, good durability, etc.
Description
Technical field
The invention belongs to building material field, be specifically related to a kind of reinforced bar sleeve connection injection material.
Background technology
In the last few years, along with the development of China's prefabricated concrete structure, node interconnection technique has been proposed to new requirement, grout sleeve interconnection technique is arisen at the historic moment under such background.More traditional reinforcing bar welding and mechanical connection, sleeve connects the advantage with structure and construction two aspects.Reinforced bar sleeve junctor is applied to the connection of reinforcing bar in prefabricated components, is to shrink high-strength grout as the medium that transmits load and storeroom cohesive force by nothing.The use of reinforced bar sleeve junctor has greatly reduced the settling time of prefabricated components, reduces reinforcing bar overlap length.In skeleton construction, why two kinds of diverse materials of character of reinforcing bar and concrete can work jointly, are mainly the bond stress relying between reinforcing bar and concrete.
But the grouting material quality on existing market is uneven, particularly the grouting material of high strength micro expansion type is not also a lot, therefore for research a kind of there is high-strength, high workability, microdilatancy type connect having great importance with grouting material for reinforced bar sleeve.
Summary of the invention
Technical problem: main purpose of the present invention, higher for existing injection material water-cement ratio, easily there is the problem of bleeding, segregation demixing phenomenon and intensity and early expansion deficiency in slurry, a kind of High Strength Steel Bar sleeve connection injection material of low water binder ratio is provided.
Technical scheme: a kind of reinforced bar sleeve of the present invention connects with the strong injection material of nothing contraction superelevation, on the basis of high efficiency water reducing agent, mix again fine mineral component (I level flyash+silicon ash), further improve reinforced bar sleeve and connect the mobility with grouting material, its composition and weight percent are:
The quality that wherein water-cement ratio is water and silicate cement, I level flyash and silicon ash quality and ratio.
The intensity of described silicate cement is not less than 42.5 strength grades.
Described silicon ash median size approximately 0.02 μ m.
Described I level flyash specific surface area is not less than 400m
2/ kg, median size≤10 μ m.
Described high efficiency water reducing agent water-reducing rate >=30%.
Described early expansion agent is sulplo-aluminate quasi-plastic property swelling agent.
Described middle and later periods swelling agent is the one in sulplo-aluminate class, calcium oxide or magnesium oxide class, total alkali content≤0.75%.
Described defoamer is polyether-modified silicon defoaming agent or dimethyl silicone oil defoamer.
Beneficial effect:
1. reinforced bar sleeve of the present invention connects with grouting material employing fine mineral component and high efficiency water reducing agent, makes it in the requirement that is issued to high fluidity compared with low water binder ratio.Between this hole path pressure grouting material water-cement ratio 0.16～0.20 time, initial flow degree is 315～340mm, and 30min degree of mobilization is 305～325mm.
2. reinforced bar sleeve connection of the present invention adopts 52.5 silicate cements with grouting material, ensures that it has higher early strength and later strength.1d ultimate compression strength >=45MPa, 3d ultimate compression strength >=65MPa, 28d ultimate compression strength >=100MPa.
3. the present invention adopts one or more composition of concrete admixtures to use, and injection material has without bleeding, the features such as layering, microdilatancy, good endurance of not emanating.
Embodiment
Below in conjunction with specific examples come the present invention will be further described, below embodiment only for the present invention being described but not limitation of the present invention.
Embodiment 1
By weight percentage: cement 30% silicon ash 5%I level flyash 15% early expansion agent 0.4% sulplo-aluminate class swelling agent 10% defoamer 0.3% quartz sand 40% water-cement ratio 0.18
Embodiment 2
By weight percentage: cement 37% silicon ash 5%I level flyash 15% early expansion agent 0.3% sulplo-aluminate class swelling agent 8% defoamer 0.3% quartz sand 35% water-cement ratio 0.18
Embodiment 3
By weight percentage: cement 25% silicon ash 5%I level flyash 20% early expansion agent 0.5% sulplo-aluminate class swelling agent 10% defoamer 0.3% quartz sand 40% water-cement ratio 0.16
Each component is mixed by above-mentioned weight ratio, adopt glue sand agitator to stir, churning time is 10min.Reinforced bar sleeve connection sees the following form by the physicals of grouting material.
Claims (8)
1. reinforced bar sleeve connects with the strong injection material of nothing contraction superelevation, it is characterized in that: its composition and weight percent are:
The quality that wherein water-cement ratio is water and silicate cement, I level flyash and silicon ash quality and ratio.
2. a kind of reinforced bar sleeve according to claim 1 connects with without shrinking the strong injection material of superelevation, it is characterized in that, the intensity of described silicate cement is not less than 42.5 strength grades.
3. a kind of reinforced bar sleeve according to claim 1 connects with without shrinking the strong injection material of superelevation, it is characterized in that, described silicon ash median size approximately 0.02 μ m.
4. a kind of reinforced bar sleeve according to claim 1 connects with without shrinking the strong injection material of superelevation, it is characterized in that, described I level flyash specific surface area is not less than 400m
2/ kg, median size≤10 μ m.
5. a kind of reinforced bar sleeve according to claim 1 connects with without shrinking the strong injection material of superelevation, it is characterized in that described high efficiency water reducing agent water-reducing rate >=30%.
6. a kind of reinforced bar sleeve according to claim 1 connects with without shrinking the strong injection material of superelevation, it is characterized in that, described early expansion agent is sulplo-aluminate quasi-plastic property swelling agent.
7. a kind of reinforced bar sleeve according to claim 1 connects with without shrinking the strong injection material of superelevation, it is characterized in that, described middle and later periods swelling agent is the one in sulplo-aluminate class, calcium oxide or magnesium oxide class, total alkali content≤0.75%.
8. a kind of reinforced bar sleeve according to claim 1 connects with without shrinking the strong injection material of superelevation, it is characterized in that, described defoamer is polyether-modified silicon defoaming agent or dimethyl silicone oil defoamer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410093760.1A CN103922660A (en) | 2014-03-13 | 2014-03-13 | Shrinkage-free ultrahigh-strength grouting material for connection of steel bar sleeves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410093760.1A CN103922660A (en) | 2014-03-13 | 2014-03-13 | Shrinkage-free ultrahigh-strength grouting material for connection of steel bar sleeves |
Publications (1)
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| CN103922660A true CN103922660A (en) | 2014-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201410093760.1A Pending CN103922660A (en) | 2014-03-13 | 2014-03-13 | Shrinkage-free ultrahigh-strength grouting material for connection of steel bar sleeves |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104402363A (en) * | 2014-09-16 | 2015-03-11 | 柳州欧维姆机械股份有限公司 | Sleeve grouting material for connection of steel bar and preparation method thereof |
| CN105439512A (en) * | 2015-11-13 | 2016-03-30 | 江苏苏博特新材料股份有限公司 | Ultrahigh strength cement-based grouting material easy to stir |
| CN104860616B (en) * | 2015-04-17 | 2016-08-17 | 临沂大学 | Seif-citing rate Self-leveling equipment grouting material |
| CN105967568A (en) * | 2016-05-11 | 2016-09-28 | 北京中德新亚建筑技术有限公司 | High-strength shrinkage-free sleeve grouting material for rebar connection and preparing method of high-strength shrinkage-free sleeve grouting material |
| CN106316279A (en) * | 2015-06-30 | 2017-01-11 | 上海宝冶集团有限公司 | Grouting material composition for grouting connection of reinforcing steel bar and sleeve |
| CN107915435A (en) * | 2017-11-28 | 2018-04-17 | 中国建筑材料科学研究总院有限公司 | The fast gravity die bar connecting sleeve grouting material of low-temperature-sensitive seif-citing rate |
| CN108424066A (en) * | 2017-07-13 | 2018-08-21 | 上海城建建设实业集团新型建筑材料有限公司 | A kind of grouting material and its preparation method and application |
| CN109704615A (en) * | 2019-01-24 | 2019-05-03 | 深圳市红威达建材有限公司 | Pumping of prostressed duct agent, preparation method and grouting material |
| CN111848035A (en) * | 2020-07-20 | 2020-10-30 | 中建西部建设新材料科技有限公司 | Grouting material for connecting reinforcing steel bar sleeve and preparation method and application thereof |
| CN112299791A (en) * | 2020-11-16 | 2021-02-02 | 上海宝冶工程技术有限公司 | Non-ignition concrete floor material |
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| CN1887781A (en) * | 2006-07-13 | 2007-01-03 | 内蒙古科技大学 | No-shrinkage grouting filler with adjustable performance |
| CN101798208A (en) * | 2010-02-22 | 2010-08-11 | 湖北中桥科技有限公司 | High fluidity grouting material and production method thereof |
| CN102320785A (en) * | 2011-06-16 | 2012-01-18 | 上海维固工程实业有限公司 | Shrinkage-free grouting reinforcing material and preparation process thereof |
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- 2014-03-13 CN CN201410093760.1A patent/CN103922660A/en active Pending
Patent Citations (3)
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| CN1887781A (en) * | 2006-07-13 | 2007-01-03 | 内蒙古科技大学 | No-shrinkage grouting filler with adjustable performance |
| CN101798208A (en) * | 2010-02-22 | 2010-08-11 | 湖北中桥科技有限公司 | High fluidity grouting material and production method thereof |
| CN102320785A (en) * | 2011-06-16 | 2012-01-18 | 上海维固工程实业有限公司 | Shrinkage-free grouting reinforcing material and preparation process thereof |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104402363A (en) * | 2014-09-16 | 2015-03-11 | 柳州欧维姆机械股份有限公司 | Sleeve grouting material for connection of steel bar and preparation method thereof |
| CN104860616B (en) * | 2015-04-17 | 2016-08-17 | 临沂大学 | Seif-citing rate Self-leveling equipment grouting material |
| CN106316279A (en) * | 2015-06-30 | 2017-01-11 | 上海宝冶集团有限公司 | Grouting material composition for grouting connection of reinforcing steel bar and sleeve |
| CN105439512A (en) * | 2015-11-13 | 2016-03-30 | 江苏苏博特新材料股份有限公司 | Ultrahigh strength cement-based grouting material easy to stir |
| CN105967568A (en) * | 2016-05-11 | 2016-09-28 | 北京中德新亚建筑技术有限公司 | High-strength shrinkage-free sleeve grouting material for rebar connection and preparing method of high-strength shrinkage-free sleeve grouting material |
| CN108424066A (en) * | 2017-07-13 | 2018-08-21 | 上海城建建设实业集团新型建筑材料有限公司 | A kind of grouting material and its preparation method and application |
| CN107915435A (en) * | 2017-11-28 | 2018-04-17 | 中国建筑材料科学研究总院有限公司 | The fast gravity die bar connecting sleeve grouting material of low-temperature-sensitive seif-citing rate |
| CN109704615A (en) * | 2019-01-24 | 2019-05-03 | 深圳市红威达建材有限公司 | Pumping of prostressed duct agent, preparation method and grouting material |
| CN111848035A (en) * | 2020-07-20 | 2020-10-30 | 中建西部建设新材料科技有限公司 | Grouting material for connecting reinforcing steel bar sleeve and preparation method and application thereof |
| CN112299791A (en) * | 2020-11-16 | 2021-02-02 | 上海宝冶工程技术有限公司 | Non-ignition concrete floor material |
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Application publication date: 20140716 |