CN103073217B - Special porelike grouting agent for bridge concrete - Google Patents
Special porelike grouting agent for bridge concrete Download PDFInfo
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- CN103073217B CN103073217B CN201310004012.7A CN201310004012A CN103073217B CN 103073217 B CN103073217 B CN 103073217B CN 201310004012 A CN201310004012 A CN 201310004012A CN 103073217 B CN103073217 B CN 103073217B
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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is not corroded and firmly sticked with concrete, a plurality kinds of materials are not needed on the spot, out-of-date products are eliminated, energy consumption is reduced, and the special porelike grouting agent can be used immediately when water and cement are added and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 being exclusively used in bridge concrete.
Background technology
Along with National Highway net, the railway network, the developing by leaps and bounds of municipal bridge, the widely using of Longspan Bridge prestressed structure, bridge concrete grouting agent demand are increasing.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 Building technology.Ensure that the gordian technique in the work-ing life of prestressed concrete structure makes prestress hole path pressure grouting closely knit exactly, reduce loss of prestress, and prevent 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 being 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 the not corrosion of protection pre-stressing tendon, ensures effective transmission of power between itself and concrete member.There is some deficiency following in current press mortar; 1, use backward multiple starting material slurrying, constructional difficulties, water-cement ratio is crossed hard intensity and cannot be ensured; 2, the backwardness of design philosophy, pulping equipment, the method for inspection in design process, causes slurry index not reach code requirement; 3, preparation of construction and the unreliable of construction technology cause the uncontrollable of product; 4, particularly the temperature environment such as Xinjiang is badly regional, day and night temperature is large, material is alkaline high, can not meet code requirement when common grouting agent uses in this area, and such as mobility, water-cement ratio, bleeding rate, turgidity, time of coagulation and bending and compressive strength are all affected.The grouting agent overwhelming majority conventional on market can not meet the requirement of new criteria.
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 applicable special region environment, the requirement of " highway bridge and culvert construction technique normalizing " (JTG/T F50-2011) and " railway post stressed concrete beam pipe mudjacking agent technical qualification " TB3192-2008 can be met very well.
For achieving the above object, the technical scheme taked of the present invention is as follows:
. a kind of hole path pressure grouting agent being exclusively used in bridge concrete, it is characterized in that being made up of the additive of following per-cent of described grouting agent, 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, silicate cement.
Described water reducer is one or more in amido sulfoacid series, naphthalene system, polycarboxylic acid series.
Described swelling agent is one or more in organic hydrocarbon compound, calcium sulphoaluminate class, 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, not bleeding, not stratified.
2, good endurance, is inorganic grouting material, does not exist aging, to reinforcing bar non-corroding, durable firm.
3, mud jacking has the characteristics such as strong, microdilatancy full morning.
4, product has high full property, can construct by disposable mud jacking, the closely knit imporosity of slurry in pipeline.
5, deformed bar not corrosion, firm with concrete binding.
6, onsite application is without the need to multiple material, the eliminating of outmoded products, reduction energy consumption.
7, scene adds water and cement mixing evenly can use, simple to operation.
8, improve weather resistance and the work-ing life of bridge.
Embodiment
This kind is exclusively used in the hole path pressure grouting agent of bridge concrete, is made up 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, silicate cement, can be independent, also can mix.
Described water reducer is one or more in amido sulfoacid series, naphthalene system, polycarboxylic acid series, can be independent, also can mix.。
Described swelling agent is one or more in organic hydrocarbon compound, calcium sulphoaluminate class, 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 0.5%(quality), be more preferably less than 0.3%(quality).
Embodiment 1
Various material according to following mass percentage content is:
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%
Above mixing of materials is placed in mixer uniform stirring and obtains grouting agent.
When the present invention uses: 1. use 0.27 ± 0.01 water-cement ratio preparation slurry, carry out mud jacking or grouting.
2. during configuration slurry, order of addition(of ingredients) is: first add water, add grouting agent again, last slowly at the uniform velocity add cement, mix in normal silicate 42.5 grades or 52.5 class g cements and use, conventional volume is that 10-15%(adopts inner blending method, i.e. equivalent replace cement), concrete volume must be selected according to Cement Quality, behavior pattern.
Stir while add cement limit, to be mixed evenly after high-speed stirring 5 minutes again, high-speed stirring rotating speed >=1000 turn/min.
During mud jacking, slurry temperature should remain between 5 DEG C-30 DEG C, and grouting material, from the perdurability being stirred to press-in duct, depending on temperature situation, generally within the scope of 30-45min, otherwise should take measures to satisfy condition.
Grouting material answers continuously stirring before use with in pressure injection process.
The present invention can realize following 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.
Above-mentioned press mortar adopts the funnel viscosity measurement 1725ml elution time, water-cement ratio≤0.28, and slurry initial flow degree is that after 12s, 30min, degree of mobilization is that after 14s, 60min, degree of mobilization is 18s; 3h steel wire bleeding rate is the free bleeding rate of 0,24h is 0; After 7d, ultimate compression strength reaches 52MPa, and folding strength reaches 10MPa; After 28d, ultimate compression strength reaches 60MPa, and folding strength reaches 12.5MPa; Presetting period is 9h, and final setting time is 11h.
The present invention is owing to have employed said ratio, and selecting of additive can according to circumstances be selected 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 material according to following mass percentage content is:
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%
Above mixing of materials is placed in mixer uniform stirring and obtains grouting agent.
When the present invention uses: 1. use 0.27 ± 0.01 water-cement ratio preparation slurry, carry out mud jacking or grouting.
2. during configuration slurry, order of addition(of ingredients) is: first add water, add grouting agent again, last slowly at the uniform velocity add cement, mix in normal silicate 42.5 grades or 52.5 class g cements and use, conventional volume is that 10-15%(adopts inner blending method, i.e. equivalent replace cement), concrete volume must be selected according to Cement Quality, behavior pattern.
Stir while adding, to be mixed evenly after high-speed stirring 5 minutes again, high-speed stirring rotating speed >=1000 turn/min.
During mud jacking, slurry temperature should remain between 5 DEG C-30 DEG C, and grouting material, from the perdurability being stirred to press-in duct, depending on temperature situation, generally within the scope of 30-45min, otherwise should take measures to satisfy condition.
Grouting material answers continuously stirring before use with in pressure injection process.
The present invention can realize following 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
Above-mentioned press mortar adopts the funnel viscosity measurement 1725ml elution time, and initial flow degree is that after 14s, 30min, degree of mobilization is that after 16s, 60min, degree of mobilization is 20s; 3h steel wire bleeding rate is the free bleeding rate of 0,24h is 0; Ultimate compression strength 51MPa after 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 is owing to have employed said ratio, and selecting of additive can according to circumstances be selected 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 (1)
1. one kind is exclusively used in the hole path pressure grouting agent of bridge concrete, it is characterized in that described grouting agent is made up 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%; Described dispersion agent is one or more in wollastonite powder, Paris white, silica powder, first level flour coal ash, slag, terra alba, calcite, silicate cement; Described water reducer is one or more in amido sulfoacid series, naphthalene system, polycarboxylic acid series; Described plastic expansion agent is one or more in organic hydrocarbon compound, calcium sulphoaluminate class, calcium oxide; Described toughener is sodium sulfate; Described adjustable solidification agent is that five water metasilicic acids are received.
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| 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 |
Citations (6)
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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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- 2013-01-07 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 |
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