CN1448363A - High-strength anchor grouting agent - Google Patents
High-strength anchor grouting agent Download PDFInfo
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- CN1448363A CN1448363A CN 03113391 CN03113391A CN1448363A CN 1448363 A CN1448363 A CN 1448363A CN 03113391 CN03113391 CN 03113391 CN 03113391 A CN03113391 A CN 03113391A CN 1448363 A CN1448363 A CN 1448363A
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- agent
- early strength
- reducing agent
- grouting
- strength
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Abstract
The high-strength anchoring and grouting agent is one kind of repairing and reinforcing material for building engineering. It is produced by mixing common Portland cement 89.0-92.0 wt%, swelling agent 5.0-8.0 wt%, early strength water-reducing agent 2.0-2.5 wt% and adhesive 0.2-0.5 wt%, where the swelling agent is U-type or UPS-type swelling agent, the early strength water-reducing agent is DAF-type early strength water-reducing agent and the adhesive is interface treating adhesive. As one kind of high-performance grouting material, the present invention is used reinforcing planted rib, grouting crack, column head and hole, cementing well, etc. Compared with epoxy grout, building structure glue and similar material, the present invention has 3 times lowered cost.
Description
One, technical field
The present invention is a kind of the be used for material that construction work is repaired and reinforced, especially a kind of high-strength anchor grouting agent.
Two, background technology
The binding agent of engineering and bar planting is studied for a second time courses one has flunked in the reinforcing that the anchor grouting agent is mainly used in existing structure, and this just requires the anchor grouting agent to have very high early strength and strong cohesive property energy.Existing anchor grouting agent, higher as epoxy mortar, construction structure glue cost, this wastes for large-scale civil construction project very much, and epoxy mortar and construction structure glue be liquid as a form of gel, and it is not too convenient to transport.If adopt Portland cement to replace the anchor grouting agent, engineering reality and experimental study show: the early strength of cement is lower, and especially adhesive property is relatively poor, is difficult to satisfy the requirement of actual engineering.
Three, summary of the invention
1, technical problem
The purpose of this invention is to provide a kind of cheap, early strength is higher, strong cohesive property energy, convenient construction and transport, free of contamination high-strength anchor grouting agent.
2, technical scheme
Main technical schemes of the present invention is: add swelling agent, early strength water-reducing agent and the binding agent early strength to strengthen the adhesive property between injection material and the old concrete interface and to improve injection material of certain proportioning in common 425# or 525# silicate cement, so that the bar planting grouting in the reinforcing engineering, crack grouting and column cap grouting.It is characterized in that: choose ordinary Portland cement, swelling agent, early strength water-reducing agent and binding agent and mix, its weight percent is: ordinary Portland cement 89.0～92.0%, swelling agent 5.0～8.0%, early strength water-reducing agent 2.0～2.5%, binding agent 0.2～0.5%.Wherein: swelling agent is U type or UPS type swelling agent; Early strength water-reducing agent is a DAF type early strength water-reducing agent; Binding agent is an interface processing class binding agent.
By weight percentage, ordinary Portland cement 91.0%, swelling agent 6.5%, early strength water-reducing agent 2.2% and binding agent 0.3% is optimal proportion.
3, beneficial effect
The present invention is the good injection material of a kind of performance, is mainly used in bar planting in the reinforcing engineering, perfusion crack, column cap and the engineerings such as hole and well cementation.Compare with materials such as epoxy mortar and construction structure glues, it has reduced the expense of material widely under the prerequisite that satisfies engineering strength and requirement, and price approximately reduces about 3 times on year-on-year basis; This material has fast, the early stage cohesive strength advantages of higher of condensing, and has shortened the requirement of duration widely; This material is Powdered, pollution-free, odorlessness, non-corrosiveness, easy construction.The major cause that produces these advantages is that having adopted the ordinary Portland cement with cheapness is body material, swelling agent, early strength water-reducing agent and binding agent can obviously improve the early strength and the adhesive property of anchor grouting agent under the proportioning optimizing, and these materials are solid powdery, have pollution-free, odorlessness, non-corrosiveness characteristic.
Four, embodiment
The anchor grouting agent requires to have very strong interfacial bond property and higher early strength, epoxy mortar, construction structure glue can be used as injection material, yet it costs an arm and a leg, if be used for large-area column cap grouting, crack grouting and bar planting grouting, its cost is very high, epoxy mortar and construction structure glue are liquid as a form of gel on the other hand, and it is not too convenient to transport.Why ortho-water mud can not be used for the anchor grouting material is because it has shrinking effect, produce shrinkage crack between the old and new interface in the process of setting, and early strength is lower.For addressing these problems, the present invention has added swelling agent not of the same race (U type, UPS type and HSP type), early strength water-reducing agent (DAF type, ZQ-2 type and compound), binding agent (interface processing class) and other material (sodium cellulosate, latex powder, wilkinite, fine sand, medium sand) in common 425# cement.Under different proportionings, carried out a large amount of pull-out tests, compressive strength test, folding strength test and final setting time test just, optimized under the prerequisite of pull strength that material is formed and proportioning is as follows satisfying:
| Material is formed | The proportioning upper limit | The proportioning lower limit | Best proportioning value |
| Ordinary Portland cement | ????89.0％ | ????92.0％ | ????91.0％ |
| Swelling agent (U type or UPS type swelling agent) | ????8.0％ | ????5.0％ | ????6.5％ |
| Early strength water-reducing agent (DAF type early strength water-reducing agent) | ????2.5％ | ????2.0％ | ????2.2％ |
| Binding agent (interface processing class) | ????0.5％ | ????0.2％ | ????0.3％ |
The test of 1 fs
Performance according to various admixtures tentatively is selected in interpolation swelling agent not of the same race, early strength water-reducing agent not of the same race, binding agent, interface treating agent and fine aggregate in the cement, and research proportioning not of the same race is to the influence of material adhesive property.The cement that is adopted in this step-by-step test all is common 425# silicate cement, and the reinforcing bar of bar planting pull-out test all is Φ 16, and the bar planting degree of depth is taken as 240mm by standard.
Can draw by experimental study: swelling agent has remarkable influence to drawing ability and the early strength that improves injection material, and has optimized the swelling agent kind; Early strength water-reducing agent has remarkable influence to drawing ability and the early strength that improves injection material, and has optimized the early strength water-reducing agent kind; The adding binding agent has certain effect to the raising tool of adhesive property in injection material, but effect is not very remarkable; The proportioning of swelling agent, early strength water-reducing agent and binding agent has remarkable influence to the drawing ability of injection material; When adding wilkinite, make deleterious on the contrary.
The main component that can determine the anchor grouting agent of subordinate phase test according to the test-results of fs is: 425# cement, swelling agent (U type or UPS type), early strength water-reducing agent (DAF type) and binding agent.
The test of 2 subordinate phase
Swelling agent, early strength water-reducing agent and binding agent to selected composition carry out pull-out test, compressive strength test, folding strength test and final setting time test just under different proportionings, test result is as follows.
| The performance test item | The anchor grouting agent | Portland cement | Whether the anchor grouting agent satisfies engineering objective or requirement |
| 1 day Φ 16 drawing force | ???25～60KN | ??12～30KN | Do not satisfy reinforcement yielding power 62.34KN |
| 3 days Φ 16 drawing forcies | ???80～120KN | ??40～65KN | Satisfy reinforcement yielding power 62.34KN |
| 7 days Φ 16 drawing forcies | 100KN～break | ??60～90KN | Satisfy reinforcement yielding power 62.34KN |
| 1 day φ 8 drawing force | ???7～11KN | ??3～7KN | Do not satisfy reinforcement yielding power 10.56KN |
| 3 days φ 8 drawing forcies | ???11～19KN | ??5～11KN | Satisfy reinforcement yielding power 10.56KN |
| 7 days φ 8 drawing forcies | 14KN～break | ??7～14KN | Satisfy reinforcement yielding power 10.56KN |
| 1 day Φ 25 drawing force | ???40～100KN | ??20～55KN | Do not satisfy reinforcement yielding power 152.18KN |
| 3 days Φ 25 drawing forcies | ???120～165KN | ??60～90KN | Do not satisfy reinforcement yielding power 152.18KN |
| 7 days Φ 25 drawing forcies | 160KN～break | ??80～140KN | Satisfy reinforcement yielding power 152.18KN |
| 1 day ultimate compression strength (MPa) | ????45～54 | ??25～35 | |
| 3 days ultimate compression strength (MPa) | ????58～72 | ??38～49 | |
| 7 days ultimate compression strength (MPa) | ????70～85 | ??50～65 | |
| 1 day folding strength (MPa) | ????4.7～6.1 | ??2.1～2.8 | |
| 3 days folding strengths (MPa) | ????8.1～10.5 | ??4.7～5.6 | |
| 7 days folding strengths (MPa) | ????11.2～12.5 | ??8.7～9.7 | |
| Presetting period (hour) | ????2.18～2.62 | ??2.70～2.82 | |
| Final setting time (hour) | ????2.57～3.02 | ??3.67～3.75 |
Can draw by experimental study: in ordinary Portland cement, add ultimate compression strength and folding strength that swelling agent, early strength water-reducing agent and binding agent can improve test specimen greatly, and shortened the first final setting time of test specimen effectively; The different proportionings of each moiety have influenced the extraction-resistant behavior and the early strength of anchor grouting material significantly, optimize the one-tenth shown in aforementioned through test and are grouped into and proportioning; For selected anchor grouting agent, under the general temperature condition, its withdrawal resistance of 3 days has surpassed the yield strength (φ 8, Φ 16 and Φ 25) of reinforcing bar, even under the outdoor conditions of severe cold in winter, its 7 days withdrawal resistances also surpass the yield strength (φ 8, Φ 16 and Φ 25) of reinforcing bar; For selected anchor grouting agent, its ultimate compression strength and folding strength (mainly being early strength) are more much higher than ordinary Portland cement; For selected anchor grouting agent, just final setting time is shorter than Portland cement for it.The swelling agent, early strength water-reducing agent and the binding agent that add suitable proportioning in ordinary Portland cement are eliminated the crack at the old and new interface to eliminate the shrinking effect of cement in process of setting, strengthen the early strength and the adhesive property of anchor grouting agent.This anchor grouting agent and water are prepared according to a certain percentage, determine whether with addition of thick or fine aggregate, carry out the grouting of column cap or crack after stirring, perhaps bar planting grouting according to engine request.
Claims (5)
1. high-strength anchor grouting agent, it is characterized in that: choose silicate cement, swelling agent, early strength water-reducing agent and binding agent and mix, its weight percent is: ordinary Portland cement 89.0～92.0%, swelling agent 5.0～8.0%, early strength water-reducing agent 2.0～2.5%, binding agent 0.2～0.5%.
2. high-strength anchor grouting agent according to claim 1 is characterized in that: by weight percentage, ordinary Portland cement 91.0%, swelling agent 6.5%, early strength water-reducing agent 2.2% and binding agent 0.3% is optimal proportion.
3. high-strength anchor grouting agent according to claim 1 and 2 is characterized in that swelling agent is U type or UPS type swelling agent.
4. according to claim 1 or 2 or 3 described high-strength anchor grouting agent, it is characterized in that early strength water-reducing agent is a DAF type early strength water-reducing agent.
5. according to claim 1 or 2 or 3 or 4 described high-strength anchor grouting agent, it is characterized in that binding agent is an interface processing class binding agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03113391 CN1448363A (en) | 2003-05-01 | 2003-05-01 | High-strength anchor grouting agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03113391 CN1448363A (en) | 2003-05-01 | 2003-05-01 | High-strength anchor grouting agent |
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| Publication Number | Publication Date |
|---|---|
| CN1448363A true CN1448363A (en) | 2003-10-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03113391 Pending CN1448363A (en) | 2003-05-01 | 2003-05-01 | High-strength anchor grouting agent |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102887727A (en) * | 2011-07-22 | 2013-01-23 | 通用电气公司 | Methods for repairing a turbine airfoil constructed from cmc material |
| WO2014146392A1 (en) * | 2013-03-22 | 2014-09-25 | 中国矿业大学 | Paste fixed-length anchoring supporting method |
| CN104788045A (en) * | 2014-01-18 | 2015-07-22 | 上海标仕新型建筑材料厂 | Grouting material |
-
2003
- 2003-05-01 CN CN 03113391 patent/CN1448363A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102887727A (en) * | 2011-07-22 | 2013-01-23 | 通用电气公司 | Methods for repairing a turbine airfoil constructed from cmc material |
| WO2014146392A1 (en) * | 2013-03-22 | 2014-09-25 | 中国矿业大学 | Paste fixed-length anchoring supporting method |
| CN104788045A (en) * | 2014-01-18 | 2015-07-22 | 上海标仕新型建筑材料厂 | Grouting material |
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