CN103910512A - Post-tensioned prestressed pore channel grouting material - Google Patents
Post-tensioned prestressed pore channel grouting material Download PDFInfo
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- CN103910512A CN103910512A CN201410093522.0A CN201410093522A CN103910512A CN 103910512 A CN103910512 A CN 103910512A CN 201410093522 A CN201410093522 A CN 201410093522A CN 103910512 A CN103910512 A CN 103910512A
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- grouting material
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- pressure grouting
- hole path
- path pressure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a post-tensioned prestressed pore channel grouting material. The grouting material comprises following components by weight: 50-85% of silicate cement, 5-35% of limestone powder, 5-20% of ultrafine slag powder, 0.2-1% of an earlier-stage expanding agent, 2-16% of a middle- and later- stage expanding agent, 0.4-2% of an efficient water reducing agent, 0.002-0.01% of a stabilizing agent, 0.1-1% of a defoaming agent and 0.01-0.5% of a retarder, with the water glue ratio being 0.26-0.28. The grouting material has advantages of high fluidity, high strength in the earlier stage and the later stage, no water bleeding, no isolation or layering, micro-expansion, good durability, and the like.
Description
Technical field
The invention belongs to building material field, be specifically related to a kind of post-stressed hole path pressure grouting material.
Background technology
Along with developing rapidly of China's infrastructure construction, prestressed concrete structure is used widely in Large Span Bridges.In prestressed concrete structure system, the effect of hole path pressure grouting mainly contains 3 points: the one, and protection deformed bar exempts from corrosion, guarantees the safety of prestressed concrete structure; The 2nd, make deformed bar and concrete have good bonding, guarantee prestressed effective transmission between them, make deformed bar and concrete acting in conjunction; The 3rd, eliminate prestressed concrete structure under course under cyclic loading, due to the fatigure failure that STRESS VARIATION causes ground tackle, improve reliability of structure.Therefore, the quality of pore squeezing quality will directly affect the safety and reliability of whole prestressed concrete structure.
On August 1st, 2011, Department of Transportation issues and has implemented " highway bridge and culvert construction technique normalizing " JTG/TF50-2011, wherein back-tension prestressed channel mudjacking material is had higher requirement.The variation of this standard maximum is, require the water-cement ratio of hole path pressure grouting material to be controlled in 0.26～0.28 scope, and initial flow degree will reach 10～17 seconds.But mostly take " railway post stressed concrete beam pipe mudjacking technical qualification ", TB/T3192-2008 is as standard for hole path pressure grouting material in the market, water-cement ratio is in 0.32 left and right.Therefore,, at the hole path pressure grouting material compared with preparing high fluidity under low water binder ratio, be of great immediate significance.
Summary of the invention
Technical problem: main purpose of the present invention is higher for existing hole path pressure grouting material water-cement ratio, easily there is the problem of bleeding, segregation demixing phenomenon in slurry, a kind of post-stressed hole path pressure grouting material of low water binder ratio is provided.
Technical scheme: the post-stressed hole path pressure grouting material of one of the present invention, obtain on basis at high efficiency water reducing agent, mix limestone powder and ultrafine slag powder, further improve the mobility of hole path pressure grouting material.
The weight percent of its composition is:
Water-cement ratio be the quality of water and silicate cement, ultrafine slag powder and limestone powder quality and ratio.
The intensity of described silicate cement is not less than 42.5 strength grades.
Described limestone powder granularity is 800 order～2500 orders.
Described ultrafine slag powder specific surface area is not less than 800m
2/ kg, median size≤4 μ m.
Described high efficiency water reducing agent water-reducing rate >=30%.
Described early expansion agent is the agent of CSA plastic expansion or EZZ-01 or the agent of EEA-101 plastic expansion.
Described middle and later periods swelling agent is calcium oxide or magnesium oxide class swelling agent, total alkali content≤0.75%.
Described stablizer is one or more in methylcellulose gum, Walocel MT 20.000PV, Natvosol.
Described defoamer is polyether-modified silicon defoaming agent or dimethyl silicone oil defoamer.
Described retardant is one or more in tartrate, citric acid, Sunmorl N 60S.
Beneficial effect:
1. post-stressed hole path pressure grouting material of the present invention adopts 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.This hole path pressure grouting material water-cement ratio is between 0.26～0.28 time, and initial flow degree is 15～17 seconds, and 30min degree of mobilization is 18～20 seconds.
2. post-stressed hole path pressure grouting material of the present invention adopts and is not less than 42.5 silicate cements, guarantees that it has higher early strength and later strength.1d ultimate compression strength >=20MPa, 3d ultimate compression strength >=40MPa, 28d ultimate compression strength >=60MPa.
3. the present invention adopts one or more composition of concrete admixtures to use, and hole path pressure grouting 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 each embodiment only for the present invention being described but not limitation of the present invention.
Embodiment 1
By weight: cement 62%, limestone powder 25%, super finely ground slag 10%, early expansion agent 0.2%, middle and later periods swelling agent 6%, defoamer 0.4%, methylcellulose gum 0.01%, Sunmorl N 60S 0.02%, water-cement ratio 0.28; Embodiment 2
By weight: cement 60%, limestone powder 30%, super finely ground slag 5%, early expansion agent 0.2%, middle and later periods swelling agent 10% defoamer 0.4%, methylcellulose gum 0.01%, Sunmorl N 60S 0.02%, water-cement ratio 0.28; Embodiment 3
By weight: cement 57%, limestone powder 20%, super finely ground slag 15%, early expansion agent 0.3%, middle and later periods swelling agent 8% defoamer 0.4%, methylcellulose gum 0.01%, Sunmorl N 60S 0.02%, water-cement ratio 0.26
Each component is mixed by above-mentioned weight ratio, adopt the homogenizer of rotating speed >=1000r/min to stir, churning time is 5min.
The physicals of grouting material sees the following form.
Claims (10)
1. a post-stressed hole path pressure grouting material, is characterized in that: the weight percent of its composition is:
Water-cement ratio be the quality of water and silicate cement, ultrafine slag powder and limestone powder quality and ratio.
2. post-stressed hole path pressure grouting material according to claim 1, is characterized in that, the intensity of described silicate cement is not less than 42.5 strength grades.
3. post-stressed hole path pressure grouting material according to claim 1, is characterized in that, described limestone powder granularity is 800 order～2500 orders.
4. post-stressed hole path pressure grouting material according to claim 1, is characterized in that, described ultrafine slag powder specific surface area is not less than 800m
2/ kg, median size≤4 μ m.
5. post-stressed hole path pressure grouting material according to claim 1, is characterized in that, described high efficiency water reducing agent water-reducing rate >=30%.
6. post-stressed hole path pressure grouting material according to claim 1, is characterized in that, described early expansion agent is the agent of CSA plastic expansion or EZZ-01 or the agent of EEA-101 plastic expansion.
7. post-stressed hole path pressure grouting material according to claim 1, is characterized in that, described middle and later periods swelling agent is calcium oxide or magnesium oxide class swelling agent, total alkali content≤0.75%.
8. post-stressed hole path pressure grouting material according to claim 1, is characterized in that, described stablizer is one or more in methylcellulose gum, Walocel MT 20.000PV, Natvosol.
9. post-stressed hole path pressure grouting material according to claim 1, is characterized in that, described defoamer is polyether-modified silicon defoaming agent or dimethyl silicone oil defoamer.
10. post-stressed hole path pressure grouting material according to claim 1, is characterized in that, described retardant is one or more in tartrate, citric acid, Sunmorl N 60S.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410093522.0A CN103910512A (en) | 2014-03-13 | 2014-03-13 | Post-tensioned prestressed pore channel grouting material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410093522.0A CN103910512A (en) | 2014-03-13 | 2014-03-13 | Post-tensioned prestressed pore channel grouting material |
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| Publication Number | Publication Date |
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| CN103910512A true CN103910512A (en) | 2014-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410093522.0A Pending CN103910512A (en) | 2014-03-13 | 2014-03-13 | Post-tensioned prestressed pore channel grouting material |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104402366A (en) * | 2014-11-03 | 2015-03-11 | 甘肃畅陇公路养护技术研究院有限公司 | Post-tensioned pre-stressing pipeline grouting agent |
| CN106866085A (en) * | 2016-12-29 | 2017-06-20 | 中铁第四勘察设计院集团有限公司 | Special grouting material and its grouting method are reinforced in a kind of high-speed railway subgrade repairing |
| CN109942218A (en) * | 2019-04-19 | 2019-06-28 | 辽宁科大中驰镁建材科技有限公司 | A kind of modified oxidized magnesium swelling agent and its preparing the application in cement-based material |
| CN110482955A (en) * | 2019-08-31 | 2019-11-22 | 中国水利水电第五工程局有限公司 | A kind of high-strength press pulp material and preparation method thereof |
| CN113620678A (en) * | 2021-09-23 | 2021-11-09 | 重庆三圣实业股份有限公司 | Grouting material and preparation method thereof |
| CN114772989A (en) * | 2022-05-20 | 2022-07-22 | 成都天博同创科技有限公司 | Micro-aggregate micro-expansion cement mortar and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102115314A (en) * | 2009-12-31 | 2011-07-06 | 北京市建筑工程研究院 | Duct grouting agent for post-tensioning prestressed concrete beams |
| CN103570307A (en) * | 2012-07-25 | 2014-02-12 | 陕西通宇新材料有限公司 | Anticorrosion rust-proof pre-stressed duct grouting material |
-
2014
- 2014-03-13 CN CN201410093522.0A patent/CN103910512A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102115314A (en) * | 2009-12-31 | 2011-07-06 | 北京市建筑工程研究院 | Duct grouting agent for post-tensioning prestressed concrete beams |
| CN103570307A (en) * | 2012-07-25 | 2014-02-12 | 陕西通宇新材料有限公司 | Anticorrosion rust-proof pre-stressed duct grouting material |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104402366A (en) * | 2014-11-03 | 2015-03-11 | 甘肃畅陇公路养护技术研究院有限公司 | Post-tensioned pre-stressing pipeline grouting agent |
| CN106866085A (en) * | 2016-12-29 | 2017-06-20 | 中铁第四勘察设计院集团有限公司 | Special grouting material and its grouting method are reinforced in a kind of high-speed railway subgrade repairing |
| CN109942218A (en) * | 2019-04-19 | 2019-06-28 | 辽宁科大中驰镁建材科技有限公司 | A kind of modified oxidized magnesium swelling agent and its preparing the application in cement-based material |
| CN110482955A (en) * | 2019-08-31 | 2019-11-22 | 中国水利水电第五工程局有限公司 | A kind of high-strength press pulp material and preparation method thereof |
| CN113620678A (en) * | 2021-09-23 | 2021-11-09 | 重庆三圣实业股份有限公司 | Grouting material and preparation method thereof |
| CN114772989A (en) * | 2022-05-20 | 2022-07-22 | 成都天博同创科技有限公司 | Micro-aggregate micro-expansion cement mortar and preparation method thereof |
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Application publication date: 20140709 |