CN103073217A - Special porelike grouting agent for bridge concrete - Google Patents
Special porelike grouting agent for bridge concrete Download PDFInfo
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- CN103073217A CN103073217A CN2013100040127A CN201310004012A CN103073217A CN 103073217 A CN103073217 A CN 103073217A CN 2013100040127 A CN2013100040127 A CN 2013100040127A CN 201310004012 A CN201310004012 A CN 201310004012A CN 103073217 A CN103073217 A CN 103073217A
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Abstract
The invention discloses a special porelike grouting agent for bridge concrete, which is characterized by being prepared from the following additives in proportion: 81.5-90.8 percent of dispersing agent, 4-8 percent of water reducing agent, 0.2-0.5 percent of plastic expanding agent, 1-3 percent of enhancer and 4-7 percent of adjustable solidification agent. Compared with the prior art, the special porelike grouting agent has the following remarkable advantages: the flowability is excellent, the mud jacking has the characteristics of fullness, early strength, minimum inflation and the like, the product has higher fullness, one-time mud jacking construction can be realized, slurry inside a pipe is compact and clearance-free, prestressed reinforcement is not corroded and firmly sticked with concrete, a plurality kinds of materials are not needed on the spot, out-of-date products are eliminated, energy consumption is reduced, and the special porelike grouting agent can be used immediately when water and cement are added and uniformly stirred on the spot, the operation is simple and convenient, the durability of bridges is improved, and the service life of bridges are prolonged.
Description
Technical field
The invention belongs to building material technical field, be specifically related to a kind of hole path pressure grouting agent that is exclusively used in bridge concrete.
Background technology
Along with developing by leaps and bounds of national HVN, the railway network, municipal bridge, being widely used of Longspan Bridge prestressed structure, bridge concrete grouting agent demand are increasing.The bridge concrete technology is the new technology that Ministry of Construction's emphasis is promoted, and it is widely used in building, bridge and special engineering structure, is important component part indispensable in the Building technology.The gordian technique that guarantees the work-ing life of prestressed concrete structure makes prestress hole path pressure grouting closely knit exactly, reduces loss of prestress, and prevents steel bar corrosion.The superiority-inferiority of grouting agent and adaptability have influence on safety coefficient and the work-ing life of bridge largely.The hole path pressure grouting agent that is exclusively used in bridge concrete is a new technology in construction application, is one key procedure of prestressed concrete construction process.In prestressed concrete structure, the quality of squeezing quality directly affects the weather resistance of bridge structure.Prestressed concrete hole path pressure grouting material is protection pre-stressing tendon not corrosion, guarantees the effective communication of power between itself and the concrete member.There is following some deficiency in present mud jacking material; 1, use the multiple starting material slurrying that falls behind, constructional difficulties, water-cement ratio is crossed hard intensity and can't be ensured; 2, the backwardness of design philosophy, pulping equipment, the method for inspection in the design process causes the slurry index not reach code requirement; 3, preparation of construction and construction technology unreliable causes the uncontrollable of product; 4, the abominable area of the temperature environment such as Xinjiang particularly, day and night temperature is large, material is alkaline high, and common grouting agent can not satisfy code requirement when using in this area, all is affected such as flowability, water-cement ratio, bleeding rate, turgidity, time of coagulation and bending and compressive strength.The grouting agent overwhelming majority commonly used can not satisfy the requirement of new criteria on the market.
Summary of the invention
For the deficiencies in the prior art part, the object of the present invention is to provide a kind of grouting agent of excellent property of suitable special region environment, can the fine requirement of satisfying " highway bridge and culvert construction technique normalizing " (JTG/T F50-2011) and " railway post stressed concrete beam pipe mudjacking agent technical qualification " TB3192-2008.
For achieving the above object, the technical scheme taked of the present invention is as follows:
. a kind of hole path pressure grouting agent that is exclusively used in bridge concrete, the additive by following per-cent that it is characterized in that described grouting agent forms, and its content is: dispersion agent 81.5 ~ 90.8%, water reducer 4 ~ 8%, plastic expansion agent 0.2 ~ 0.5%, toughener 1 ~ 3% and adjustable solidification agent 4 ~ 7%.
Described dispersion agent is one or more in wollastonite powder, Paris white, silica powder, first level flour coal ash, slag powders, terra alba, calcite, the silicate cement.
Described water reducer is one or more in amido sulfoacid series, naphthalene system, the polycarboxylic acid series.
Described swelling agent is one or more in organic hydrocarbon compound, calcium sulphoaluminate class, the calcium oxide.
Described toughener is sodium sulfate.
Described adjustable solidification agent is that five water metasilicic acids are received.
The present invention compared with prior art has following clear superiority:
1, good fluidity, resistance to compression, High anti bending strength, bleeding is not stratified.
2, good endurance is the inorganic grouting material, do not exist aging, to the reinforcing bar non-corroding, durable firm.
3, mud jacking has the characteristics such as full morning of strong, microdilatancy.
4, product has high full property, can construct by disposable mud jacking the closely knit imporosity of slurry in the pipeline.
5, not corrosion of deformed bar, firm with concrete binding.
6, the on-the-spot use need not multiple material, the eliminating of outmoded products, reduction energy consumption.
7, the scene adds water and cement mixing evenly can use, and is simple to operation.
8, weather resistance and the work-ing life of bridge have been improved.
Embodiment
This kind is exclusively used in the hole path pressure grouting agent of bridge concrete, is comprised of the additive of following per-cent, and its content is: dispersion agent 81.5 ~ 90.8%, water reducer 4 ~ 8%, plastic expansion agent 0.2 ~ 0.5%, toughener 1 ~ 3% and adjustable solidification agent 4 ~ 7%.
Described dispersion agent is one or more in wollastonite powder, Paris white, silica powder, first level flour coal ash, slag powders, terra alba, calcite, the silicate cement, can be independent, also can mix.
Described water reducer is one or more in amido sulfoacid series, naphthalene system, the polycarboxylic acid series, can be independent, also can mix.。
Described swelling agent is one or more in organic hydrocarbon compound, calcium sulphoaluminate class, the calcium oxide, can be independent, also can mix.。
Described toughener is sodium sulfate.
Described adjustable solidification agent is that five water metasilicic acids are received.
In following examples, the alkalinity of described plastic expansion agent is less than the 0.5%(quality), be more preferably less than the 0.3%(quality).
Embodiment 1
Various materials according to following mass percentage content are:
Paris white 37.7%
Terra alba 28.5%
First level flour coal ash 18%
Naphthalene water reducer 4%
Aminosulfonic water-reducing agent 4%
Plastic expansion agent 0.3%
The adjustable solidification agent 5% that five water metasilicic acids are received
The toughener of sodium sulfate is 2.5%
Place the mixer uniform stirring to make grouting agent above mixing of materials.
When the present invention uses: 1. use 0.27 ± 0.01 water-cement ratio preparation slurry, carry out mud jacking or grouting.
2. order of addition(of ingredients) is when configuring slurry: add first entry, add again grouting agent, last slow adding cement at the uniform velocity, mix in 42.5 grades of normal silicates or 52.5 class g cements and use, volume commonly used is that 10-15%(adopts inner blending method, be that equivalent replaces cement), concrete volume fibrous root is selected according to Cement Quality, performance situation.
The limit adds the cement limit stirs, high-speed stirring 5 minutes again after stirring, and high-speed stirring rotating speed 〉=1000 turn/min.
Slurry temperature should remain between 5 ℃-30 ℃ during mud jacking, and grouting material is decided on the temperature situation from being stirred to the perdurability that is pressed into the duct, generally in the 30-45min scope, otherwise should take measures to satisfy condition.
Grouting material is answered continuously stirring before use with in the pressure injection process.
The present invention can be achieved as follows technical indicator:
● water-cement ratio≤0.28.
● degree of mobilization (s): initial value≤17; 30min value≤20; 60min value≤25.
● time of coagulation (h): initial set 〉=5; Final set≤24.
● 24h degree of free swelling (%): 0-3.
● bleeding rate: 0.
● ultimate compression strength (Mpa): 3d intensity 〉=45 Mpa; 7d intensity 〉=50Mpa; 28d intensity 〉=55Mpa.
● folding strength (Mpa): 3d intensity 〉=6Mpa; 7d intensity 〉=9Mpa; 28d intensity 〉=12Mpa.
[0018] above-mentioned mud jacking material adopts the funnel viscosity instrumentation 1725ml elution time, water-cement ratio≤0.28, and slurry initial flow degree is 12s, and degree of mobilization is 14s behind the 30min, and degree of mobilization is 18s behind the 60min; 3h steel wire bleeding rate is that the free bleeding rate of 0,24h is 0; Ultimate compression strength reaches 52MPa behind the 7d, and folding strength reaches 10MPa; Ultimate compression strength reaches 60MPa behind the 28d, and folding strength reaches 12.5MPa; Presetting period is 9h, and final setting time is 11h.
The present invention has been owing to having adopted said ratio, and selecting of additive can according to circumstances select arbitrarily, and per-cent can be constant, therefore, is very suitable for using in the bridge construction in the atrocious weather areas such as Xinjiang.
Embodiment 2
Various materials according to following mass percentage content are:
Terra alba 38.7%
Wollastonite powder 25.5%
First level flour coal ash 20%
Naphthalene water reducer 5%
Aminosulfonic water-reducing agent 3%
Plastic expansion agent 0.3%
The adjustable solidification agent 5.5% that five water metasilicic acids are received
The toughener of sodium sulfate is 2%
Place the mixer uniform stirring to make grouting agent above mixing of materials.
When the present invention uses: 1. use 0.27 ± 0.01 water-cement ratio preparation slurry, carry out mud jacking or grouting.
2. order of addition(of ingredients) is when configuring slurry: add first entry, add again grouting agent, last slow adding cement at the uniform velocity, mix in 42.5 grades of normal silicates or 52.5 class g cements and use, volume commonly used is that 10-15%(adopts inner blending method, be that equivalent replaces cement), concrete volume fibrous root is selected according to Cement Quality, performance situation.
Stir while adding, high-speed stirring 5 minutes again after stirring, high-speed stirring rotating speed 〉=1000 turn/min.
Slurry temperature should remain between 5 ℃-30 ℃ during mud jacking, and grouting material is decided on the temperature situation from being stirred to the perdurability that is pressed into the duct, generally in the 30-45min scope, otherwise should take measures to satisfy condition.
Grouting material is answered continuously stirring before use with in the pressure injection process.
The present invention can be achieved as follows technical indicator:
● water-cement ratio≤0.28.
● degree of mobilization (s): initial value≤17; 30min value≤20; 60min value≤25.
● time of coagulation (h): initial set 〉=5; Final set≤24.
● 24h degree of free swelling (%): 0-3.
● bleeding rate: 0.
● ultimate compression strength (Mpa): 3d intensity 〉=45 Mpa; 7d intensity 〉=50Mpa; 28d intensity 〉=55Mpa.
● folding strength (Mpa): 3d intensity 〉=6Mpa; 7d intensity 〉=9Mpa; 28d intensity 〉=12Mpa
[0020] above-mentioned mud jacking material adopts the funnel viscosity instrumentation 1725ml elution time, and the initial flow degree is 14s, and degree of mobilization is 16s behind the 30min, and degree of mobilization is 20s behind the 60min; 3h steel wire bleeding rate is that the free bleeding rate of 0,24h is 0; Ultimate compression strength 51MPa behind the 7d, folding strength 9.5MPa; 28d ultimate compression strength reaches 58MPa, and folding strength reaches 12MPa; Presetting period is 10h, and final setting time is 12h.
The present invention has been owing to having adopted said ratio, and selecting of additive can according to circumstances select arbitrarily, and per-cent can be constant.Therefore, be very suitable for using in the bridge construction in the atrocious weather areas such as Xinjiang.
Claims (6)
1. hole path pressure grouting agent that is exclusively used in bridge concrete, it is characterized in that described grouting agent is comprised of the additive of following per-cent, its content is: dispersion agent 81.5 ~ 90.8%, water reducer 4 ~ 8%, plastic expansion agent 0.2 ~ 0.5%, toughener 1 ~ 3% and adjustable solidification agent 4 ~ 7%.
2. such as the described hole path pressure grouting agent that is exclusively used in bridge concrete of claim 1, it is characterized in that: described dispersion agent is one or more in wollastonite powder, Paris white, silica powder, first level flour coal ash, slag, terra alba, calcite, the silicate cement.
3. such as the described hole path pressure grouting agent that is exclusively used in bridge concrete of claim 1, it is characterized in that: described water reducer is one or more in amido sulfoacid series, naphthalene system, the polycarboxylic acid series.
4. such as the described hole path pressure grouting agent that is exclusively used in bridge concrete of claim 1, it is characterized in that: described plastic expansion agent is one or more in organic hydrocarbon compound, calcium sulphoaluminate class, the calcium oxide.
5. such as the described hole path pressure grouting agent that is exclusively used in bridge concrete of claim 1, it is characterized in that: described toughener is sodium sulfate.
6. such as the described hole path pressure grouting agent that is exclusively used in bridge concrete of claim 1, it is characterized in that: described adjustable solidification agent is that five water metasilicic acids are received.
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| CN201310004012.7A CN103073217B (en) | 2013-01-07 | 2013-01-07 | Special porelike grouting agent for bridge concrete |
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| CN201310004012.7A CN103073217B (en) | 2013-01-07 | 2013-01-07 | Special porelike grouting agent for bridge concrete |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106587794A (en) * | 2016-11-07 | 2017-04-26 | 福建省泉州市公路局 | Cement-based grouting treatment material and preparation method thereof |
| CN108218346A (en) * | 2018-01-29 | 2018-06-29 | 云南森博混凝土外加剂有限公司 | A kind of grouting material and preparation method thereof |
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| CN101817656A (en) * | 2009-02-26 | 2010-09-01 | 北京东方雨虹防水技术股份有限公司 | Post stressed concrete beam pipe mudjacking agent |
| CN102092982A (en) * | 2010-12-30 | 2011-06-15 | 济南鲁新新型建材有限公司 | Concrete pipeline mud-jacking agent and preparation method |
| 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 |
| CN102206062A (en) * | 2011-03-31 | 2011-10-05 | 浙江五龙化工股份有限公司 | Post-tensioned and pre-stressed pipe grouting agent |
| CN102351485A (en) * | 2011-07-08 | 2012-02-15 | 王小清 | Grouting material, premix of grouting material, and preparation method of premix |
| CN102584101A (en) * | 2012-01-20 | 2012-07-18 | 南京瑞迪高新技术有限公司 | Special grouting agent for post-tensioned prestressed concrete beams of highway bridges and culverts and preparation method thereof |
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2013
- 2013-01-07 CN CN201310004012.7A patent/CN103073217B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101817656A (en) * | 2009-02-26 | 2010-09-01 | 北京东方雨虹防水技术股份有限公司 | Post stressed concrete beam pipe mudjacking agent |
| 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 |
| CN102092982A (en) * | 2010-12-30 | 2011-06-15 | 济南鲁新新型建材有限公司 | Concrete pipeline mud-jacking agent and preparation method |
| CN102206062A (en) * | 2011-03-31 | 2011-10-05 | 浙江五龙化工股份有限公司 | Post-tensioned and pre-stressed pipe grouting agent |
| CN102351485A (en) * | 2011-07-08 | 2012-02-15 | 王小清 | Grouting material, premix of grouting material, and preparation method of premix |
| CN102584101A (en) * | 2012-01-20 | 2012-07-18 | 南京瑞迪高新技术有限公司 | Special grouting agent for post-tensioned prestressed concrete beams of highway bridges and culverts and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106587794A (en) * | 2016-11-07 | 2017-04-26 | 福建省泉州市公路局 | Cement-based grouting treatment material and preparation method thereof |
| CN106587794B (en) * | 2016-11-07 | 2019-02-26 | 福建省泉州市公路局 | Cement base Grouting Treatment material and preparation method thereof |
| CN108218346A (en) * | 2018-01-29 | 2018-06-29 | 云南森博混凝土外加剂有限公司 | A kind of grouting material and preparation method thereof |
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| CN103073217B (en) | 2015-07-15 |
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