CN106082855A - A kind of high intensity high-durability modified concrete structure repair material - Google Patents
A kind of high intensity high-durability modified concrete structure repair material Download PDFInfo
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- CN106082855A CN106082855A CN201610425094.6A CN201610425094A CN106082855A CN 106082855 A CN106082855 A CN 106082855A CN 201610425094 A CN201610425094 A CN 201610425094A CN 106082855 A CN106082855 A CN 106082855A
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- Prior art keywords
- concrete
- concrete structure
- modified concrete
- repair material
- structure repair
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/72—Repairing or restoring existing buildings or building materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention discloses a kind of high intensity high-durability modified concrete structure repair material, constituent includes by weight percent: cement 10% 11%, sand 6% 7%, coarse aggregate 21% 38%, modifying agent 16% 20%, silicon ash 5% 7%, water 34% 38%.The addition of modifying agent and silicon ash improves intensity and the durability of concrete.The present invention, compared with traditional concrete material, has good service behaviour, becomes high-strength, and interfacial bond property is good, low price and the concrete repairing material of good endurance, can be widely used in the recovery project of water conservancy project and all types of industries and civil buildings.
Description
Technical field
The present invention relates to xoncrete structure repair materials field, be specifically related to a kind of high intensity high-durability modified concrete
Structure repair material.
Background technology
Before and after 1830, concrete came out to the beginning of this century, and concrete is widely used in bridge, house, dam, height
In the buildings such as speed highway and structures, it has also become one of construction material that consumption is at most, purposes is the widest.In Practical Project, by
In design or construction wrong, and severe working environment, concrete can be the most aging, damaged, particularly corrodes ring in industry
Building in border and structures, their the age period of service well below design period age.If reinforcing not in time, its structural behaviour meeting
Significant degradation, it is likely that cause structural damage.Can effectively improve structural behaviour because structure being carried out reparation, extending building
Service life, protect environment, have significant economic benefit and social benefit.
In recent years, both at home and abroad many scientific research institutions and scholar for the patching material of aging cement concrete and patcher
Skill, has carried out many research.Attempt to research and develop new material, new technology solves this problem.For development process, abroad about
The practice of concrete repair Zao 20 ~ 30 years than us.In terms of research conditions from Present Domestic, succeed in developing and put into
The concrete repairing material in market is more and more, has been summed up three major types: cementitious matrix material, resinous substrates bonding material
Material and polymer-modified cementitious materials.
Cement-based material mainly has normal concrete, ordinary mortar, fiber concrete, special mending mortar # low slump
Concrete, magnesium phosphate concrete and mortar, gunite concrete, expansive concrete etc..Cement-based material has intensity height, phase
The advantages such as capacitive is good, easy construction, but its curing period, is longer, is not suitable for salvaging.
Resin matrix material is exactly main using macromolecule resin material as the compoiste adhering material of adhesive, mainly by having
A few part of machine cementitious matter, filler and coarse aggregate forms, sometimes through mixing outside chopped fiber, coupling agent, antiaging agent, combustion adjuvant etc.
Add agent.Resin concrete has that intensity is high, water absorption rate is little, freeze-thaw resistance good, impervious good, good with old concrete caking property etc. excellent
Point, but its cure shrinkage than cement concrete several times greater to tens times, stress deformation amount and creep big, expensive.
Polymer-modified cementitious materials refers to the compound of cement and aggregate and the polymer emulsion of addition or dispersibles
The composite of polymer glue powder stirring, compared with conventional cement mortar, its tensile strength is high, tension bullet mould is relatively low,
And wear-resisting, corrosion-resistant, impervious, anti-freezing property is excellent, be combined with old concrete and there is good adhesive property, it is adaptable to because of carbon
Change, cavitation erosion, freeze-thaw damage and chemical erosion and repairing that the concrete surface layer cracking that causes, surface deterioration destroy, it is also possible to should
Use in the engineering such as anticorrosion, antiseepage.
As the repairing and reinforcing material of normal concrete, owing to being to repair on original structure, must consider new and old
The bonding of concrete is the most reliable, and the basic mechanical performance of patching material to be studied is as strong in comprcssive strength and tension
Degree, the adhesion strength of new-old concrete material to be studied.Such as, owing to the use environment of double-curve cooling column is quite severe,
Defect phenomenon for cooling tower is serious, it is desirable to repair materials should have preferable anti-carbonation and impermeability, i.e. except reinforcement,
Also want higher life requirement.
The repair materials major part used now is common repair materials, and it is not ideal that it repairs performance；Part is had to repair
Although multiple material performance is good, but price is the most much more expensive, seldom has mechanical property and endurance quality all good and price is fitted again
In patching material.Therefore to solution problem above, the present invention intends mixing polymer and silicon in common concrete material
Ash, researches and develops the concrete repair materials meeting this requirement of engineering.
At present, polymer concrete grows a lot the most, the most latex modified concrete, has many excellent
Performance and production technology are simple, and development is very fast.But current latex modified concrete is mainly with the shape of latex modified cement mortar
Formula, as various coatings, anti-corrosion protective material and the patching material of unstructuredness, seldom with latex modified concrete as building
Structural material and structural patching material.The main cause that this new material does not obtain greatly developing is: mix polymer
Afterwards, the comprcssive strength of concrete can be made to have declined, volume the more declines the more.This latex modified concrete is as building
When building structure material and structural strengthening material, its intensity tends not to meet requirement, so that the application of latex modified concrete
It is restricted.Therefore study the modified concrete of high intensity high-durability, be used for repairing or update original outmoded concrete knot
Structure thing has become one of technical problem the most urgently to be resolved hurrily.Additionally, the appearance of high molecular polymer, for high performance structural
The research of supporting material, development and application, it is provided that the basis of research and development.
Summary of the invention
For not enough present on prior art, the present invention seeks to the modification being to provide a kind of high intensity high-durability
Xoncrete structure repair materials, has intensity height, good endurance, the good and low-cost good characteristics of interfacial bond property.
To achieve these goals, the present invention is to realize by the following technical solutions:
A kind of high intensity high-durability modified concrete structure repair material of the present invention, wherein, described modified concrete is tied
The constituent of structure repair materials includes by weight percent:
Cement 10%-11%
Sand 6%-7%
Coarse aggregate 21%-38%
Modifying agent 16%-20%
Silicon ash 5%-7%
Water 34%-38%
Wherein, described sand is medium coarse sand, and modulus of fineness is 2.68.
Wherein, described coarse aggregate be particle diameter be the rubble of 5 ~ 20mm.
Wherein, described modifying agent is MA type cement modifier.
Wherein, described MA type cement modifier is milky white emulsion body.
Wherein, described silicon ash is pale powder, unit weight 200 ~ 250Kg/m3。
Wherein, the chemical analysis of described silicon ash includes SiO2, Al2O3, Fe2O3, MgO, CaO, Na2O。
Wherein, the pH of described silicon ash is neutral.
Wherein, in described silicon ash fineness less than 1 m account for more than 80%, mean diameter is at 0.1 ~ 0.3 m, specific surface
Amassing is 20 ~ 28m2/g。
Compared with prior art, the present invention's it is a technical advantage that:
The MA cement modifier that the present invention selects is a kind of new type water of modified exploitation on the basis of acrylate copolymer emulsion
Mud modifying agent.Its feature is in hard monomer in addition to methyl methacrylate, has also introduced the styrene of function admirable,
After making this latex dehydrating and curing, existing moderate finite deformation ability, there are again higher intensity and cohesion.Add MA water by a certain percentage
The cement mortar of mud modifying agent, have excellence bonding, chloride permeability freeze proof, anti-, wear-resisting, ageing-resistant, resistant to chemical media is rotten
The performances such as erosion, compared with traditional polymer cement mortar (such as epoxy resin mortar), not only low cost, and easy construction.
A small amount of inorganic ultrafine active material silicon ash that the present invention adds, it is possible to make up concrete because of the addition of polymer
And the comprcssive strength reduced.
The present invention has good service behaviour compared with traditional concrete material, becomes high-strength, interfacial bond property
Good, low price and the concrete repairing material of good endurance, repairing of water conservancy project and all types of industries and civil buildings can be widely used in
Return to work in journey.
Detailed description of the invention
A kind of high intensity high-durability modified concrete structure repair material that the present invention provides, wherein, described modification mixes
The constituent of Xtah Crude Clay structure repair materials includes by weight percent: cement 10%-11%；Sand 6%-7%；Coarse aggregate 21%-38%；
Modifying agent 16%-20%；Silicon ash 5%-7%；Water 34%-38%；Wherein, described sand is medium coarse sand, and modulus of fineness is 2.68.Wherein, institute
State coarse aggregate be particle diameter be the rubble of 5 ~ 20mm.Wherein, described modifying agent is MA type cement modifier.Wherein, described MA
Type cement modifier is milky white emulsion body.Wherein, described silicon ash is pale powder, unit weight 200 ~ 250Kg/m3, pH is
Neutrality, chemical analysis includes SiO2, Al2O3, Fe2O3, MgO, CaO, Na2O, in described silicon ash fineness less than 1 m account for 80%
Above, mean diameter is at 0.1 ~ 0.3 m, and specific surface area is 20 ~ 28m2/g。
The high intensity high-durability modified concrete structure repair material advantage compared with prior art that the present invention provides
It is: the MA cement modifier that (1) is selected is a kind of novel concrete of modified exploitation on the basis of acrylate copolymer emulsion
Modifying agent.Its feature is in hard monomer in addition to methyl methacrylate, has also introduced the styrene of function admirable, has made
After this latex dehydrating and curing, existing moderate finite deformation ability, there are again higher intensity and cohesion.Add MA cement by a certain percentage
The cement mortar of modifying agent, has the bonding of excellence, chloride permeability freeze proof, anti-, wear-resisting, ageing-resistant, resistant to chemical media corrosion
Etc. performance, compared with traditional polymer cement mortar (such as epoxy resin mortar), not only low cost, and easy construction.(2) pass through
The a small amount of inorganic ultrafine active material silicon ash added, it is possible to make up the pressure resistance that concrete reduces because of the addition of polymer
Degree.(3) having good service behaviour compared with traditional concrete material, become high-strength, interfacial bond property is good, and price is just
Preferably and the concrete repairing material of good endurance, can be widely used in water conservancy project and all types of industries with in the recovery project of civil buildings.
Below in conjunction with detailed description of the invention, the present invention being expanded on further, described method is routine side if no special instructions
Method, described material is commercial goods.
Embodiment 1
The mass percent of the constituent of the modified concrete structure repair material of this experiment preparation is respectively as follows: cement: common
Portland cement 10.5%；Sand: medium coarse sand 7%；Coarse aggregate: 5-20mm rubble 25%;Modifying agent: MA type cement modifier 16%；
Silicon ash 5%；Water 36.5%.
Normal concrete test specimen 28d comprcssive strength 33.6MPa, split tensile strength is 3.02MPa；Content of modifier 18%,
Silicon ash 0%, concrete sample 28d comprcssive strength 21.7MPa prepared, split tensile strength is 2.28MPa, this modified coagulation
Comprcssive strength and the split tensile strength of soil test specimen are respectively the 64% and 75% of normal concrete test specimen group, and MA modifying agent is described
Incorporation will reduce the early strength of concrete.This experiment adds MA type cement modifier 16%, silicon ash 5%, the modification prepared
Concrete sample 28d comprcssive strength 21.9MPa, split tensile strength is 2.31MPa, and its comprcssive strength and split tensile strength can be the most extensive
Arriving the 65% and about 76% of normal concrete test specimen group again, service behaviour is further enhanced.
Embodiment 2
The mass percent of the constituent of the modified concrete structure repair material of this experiment preparation is respectively as follows: cement: common
Portland cement 10.5%；Sand: medium coarse sand 7%;Coarse aggregate: 5-20mm rubble 25%；Modifying agent: MA type cement modifier 18%；Silicon
Ash 6%；Water 36.5%.
Normal concrete test specimen 28d comprcssive strength 33.6MPa, split tensile strength is 3.02MPa；Content of modifier 18%,
Silicon ash 0%, concrete sample 28d comprcssive strength 21.7MPa prepared, split tensile strength is 2.28MPa, this modified coagulation
Comprcssive strength and the split tensile strength of soil test specimen are respectively the 64% and 75% of normal concrete test specimen group, and MA modifying agent is described
Incorporation will reduce the early strength of concrete.This experiment adds modifying agent 18%, silicon ash 6%, the modified concrete prepared examination
Part 28d comprcssive strength 23.8MPa, split tensile strength is 2.97MPa, and its comprcssive strength and split tensile strength can return to commonly respectively
The 70% and about 98% of concrete sample group.
The most also this experiment is carried out permeability test analysis, when normal concrete does not mixes any additive, the most general
Logical concrete sample, infiltration is highly maximum, and its average infiltration has highly reached 117.93mm；Change when mixing in normal concrete
Property agent volume 18%, during silicon ash 0%, its impermeability is significantly improved, and average infiltration height be 42.88mm, the examination of relatively normal concrete
Part reduces 63.6%, illustrates that MA modifying agent can be significantly increased the impermeability of concrete；When incorporating modified dose 18%,
During silicon ash 6%, its averagely infiltration height only 19.87mm, relatively normal concrete test specimen group reduces 83.2%, reduce further
Infiltration height so that the anti-permeability performance of concrete be improved significantly, illustrate that the grey impermeability for concrete of silicon also has very well
Effect.
Embodiment 3
The mass percent of the constituent of the modified concrete structure repair material of this experiment preparation is respectively as follows: cement: common
Portland cement 10.5%；Sand: medium coarse sand 7%；Coarse aggregate: 5-20mm rubble 25%；Modifying agent: MA type cement modifier 20%；
Silicon ash 7%；Water 36.5%.
Normal concrete test specimen 28d comprcssive strength 33.6MPa, split tensile strength is 3.02MPa；Content of modifier 18%,
Silicon ash 0%, concrete sample 28d comprcssive strength 21.7MPa prepared, split tensile strength is 2.28MPa, this modified coagulation
Comprcssive strength and the split tensile strength of soil test specimen are respectively the 64% and 75% of normal concrete test specimen group, and MA modifying agent is described
Incorporation will reduce the early strength of concrete.This experiment adds modifying agent 16%, silicon ash 5%, the modified concrete prepared examination
Part 28d comprcssive strength 22.4MPa, split tensile strength is 2.56MPa, and its comprcssive strength and split tensile strength can return to commonly respectively
The 67% and about 85% of concrete sample.
The ultimate principle of the present invention and principal character and advantages of the present invention have more than been shown and described.The technology of the industry
Personnel, it should be appreciated that the present invention is not restricted to the described embodiments, simply illustrating this described in above-described embodiment and description
The principle of invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, and these become
Change and improvement both falls within scope of the claimed invention.Claimed scope by appending claims and
Equivalent defines.
Claims (8)
1. a high intensity high-durability modified concrete structure repair material, it is characterised in that described modified concrete structure
The constituent of repair materials includes by weight percent:
Cement 10%-11%；
Sand 6%-7%；
Coarse aggregate 21%-38%；
Modifying agent 16%-20%；
Silicon ash 5%-7%；
Water 34%-38%.
High intensity high-durability modified concrete structure repair material the most according to claim 1, it is characterised in that described
Sand is medium coarse sand, and modulus of fineness is 2.68.
High intensity high-durability modified concrete structure repair material the most according to claim 1, it is characterised in that described
Coarse aggregate be particle diameter be the rubble of 5 ~ 20mm.
High intensity high-durability modified concrete structure repair material the most according to claim 1, it is characterised in that described
Modifying agent is MA type cement modifier.
High intensity high-durability modified concrete structure repair material the most according to claim 4, it is characterised in that described
MA type cement modifier is milky white emulsion body.
High intensity high-durability modified concrete structure repair material the most according to claim 1, it is characterised in that described
Silicon ash is pale powder, unit weight 200 ~ 250Kg/m3, pH is neutral.
7. according to the high intensity high-durability modified concrete structure repair material described in claim 1 or 6, it is characterised in that
The chemical composition of described silicon ash includes SiO2, Al2O3, Fe2O3, MgO, CaO and Na2O。
8., according to the high intensity high-durability modified concrete structure repair material described in claim 1 or 6 or 7, its feature exists
In, in described silicon ash, the fineness material less than 1 m accounts for more than 80%, and mean diameter is in the material of 0.1 ~ 0.3 m, specific surface area
It is 20 ~ 28m2/g。
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| CN201610425094.6A CN106082855A (en) | 2016-06-16 | 2016-06-16 | A kind of high intensity high-durability modified concrete structure repair material |
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| CN201610425094.6A CN106082855A (en) | 2016-06-16 | 2016-06-16 | A kind of high intensity high-durability modified concrete structure repair material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106630858A (en) * | 2017-01-03 | 2017-05-10 | 南京航空航天大学 | Surface strengthening and repairing material for hydraulic concrete, and application thereof |
| CN108658534A (en) * | 2018-04-24 | 2018-10-16 | 北京固斯特国际化工有限公司 | A kind of solvent-free osmotic crosslink type composite dope for cooling tower anti-corrosion |
| CN112681788A (en) * | 2020-12-07 | 2021-04-20 | 国网辽宁省电力有限公司锦州供电公司 | Rapid repairing method for prestressed concrete pole crack |
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| CN101353247A (en) * | 2008-09-27 | 2009-01-28 | 北京工业大学 | Polymer modified cement based patching material |
| CN104788062A (en) * | 2015-04-22 | 2015-07-22 | 哈尔滨工程大学 | Waterborne polyurethane polymer modified concrete for bridge deck slab and preparation method |
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| CN101353247A (en) * | 2008-09-27 | 2009-01-28 | 北京工业大学 | Polymer modified cement based patching material |
| CN104788062A (en) * | 2015-04-22 | 2015-07-22 | 哈尔滨工程大学 | Waterborne polyurethane polymer modified concrete for bridge deck slab and preparation method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106630858A (en) * | 2017-01-03 | 2017-05-10 | 南京航空航天大学 | Surface strengthening and repairing material for hydraulic concrete, and application thereof |
| CN106630858B (en) * | 2017-01-03 | 2019-11-05 | 南京航空航天大学 | A kind of concrete for hydraulic structure surface peening patching material and its application |
| CN108658534A (en) * | 2018-04-24 | 2018-10-16 | 北京固斯特国际化工有限公司 | A kind of solvent-free osmotic crosslink type composite dope for cooling tower anti-corrosion |
| CN108658534B (en) * | 2018-04-24 | 2020-12-15 | 北京固斯特国际化工有限公司 | Permeable cross-linking type combined coating for corrosion prevention of cooling tower |
| CN112681788A (en) * | 2020-12-07 | 2021-04-20 | 国网辽宁省电力有限公司锦州供电公司 | Rapid repairing method for prestressed concrete pole crack |
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Application publication date: 20161109 |