CN106747133A - A kind of severe cold area high ferro pedestal concrete low temperature patching material and its application - Google Patents
A kind of severe cold area high ferro pedestal concrete low temperature patching material and its application Download PDFInfo
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- CN106747133A CN106747133A CN201611064183.9A CN201611064183A CN106747133A CN 106747133 A CN106747133 A CN 106747133A CN 201611064183 A CN201611064183 A CN 201611064183A CN 106747133 A CN106747133 A CN 106747133A
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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
- C04B28/06—Aluminous cements
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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
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/29—Frost-thaw resistance
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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
- 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
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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
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention belongs to building material technical field, more particularly to a kind of severe cold area high ferro pedestal concrete low temperature patching material and its application.Its composition is as follows：425 Portland cements, 425 sulphate aluminium cements, 725 sulphate aluminium cements, waterproof admixture, rubber powder, aggregate, water reducer, construction modifying agent, water-loss reducer, early strength agent, multifunctional nano water-repelling agent, PP fibers.A kind of severe cold area high ferro pedestal concrete low temperature patching material that the present invention is provided, the reparation construction time meets high ferro Window time requirement；Compression strength matches with pedestal concrete after the completion of aquation；Tensile bond strength with pedestal concrete is high；Microdilatancy；40 DEG C of freeze thawing resistance circulation abilities are strong, be not in it is secondary come off, requirement of the severe cold area to high ferro pedestal concrete low temperature patching material is met well.
Description
Technical field
The invention belongs to building material technical field, more particularly to a kind of severe cold area high ferro pedestal concrete low temperature repairing
Material and its application.
Background technology
Northeast severe cold area high ferro pedestal concrete is long-term to be triggered in low temperature (minimum as little as -40 DEG C), bullet train operation
Pedestal circulation vibrations etc. be on active service under adverse circumstances, often there is freeze thawing integrated disease, there is crackle and peeling, have a strong impact on
The security of train operation, it is necessary to be repaired in time.Existing method for repairing and mending is to carry out dabbing to disease region and criticize to scrape to repair
Material is mended, but on the one hand conventional patching material cannot undergo the circulating freezing resistance of -40 DEG C of severe cold area, intolerant to low after repairing use
, easily there is secondary peeling in temperature.On the other hand, conventional patching material cannot undergo the pedestal circulation shake that bullet train operation triggers
, easily there is secondary peeling in the dynamic stress damage for bringing.
The environment used according to low temperature patching material, proposes to its performance：
1st, there should be comparing early strength high, there is suitable operable time and setting time again.
2nd, preferable repair efficiency is reached, the later stage should be cold with the heat expansion of original concrete using process low temperature patching material
Contracting is consistent, it is to avoid cause repairing area hollowing occur with cracking because contraction is inconsistent.
3rd, low temperature patching material should have fine and close structure in itself, can there is enough water resistances, prevent moisture to material
Material internal penetration aggravates the freeze-thaw damage dynamics in later stage.
4th, patching material surface not load-bearing, confrontation folding intensity requirement is not high, but to have enough compression strength to resist height
The pedestal circulation that fast train operation triggers shakes brought stress damage.
5th, there are sufficiently high original bond intensity and immersion adhesion strength.
6th, the anti-freezing property to have had, is amenable to the continuous circulating freezing resistance of -40 DEG C of severe cold area.
7th, the content of chlorion is strictly controlled, it is to avoid too high levels produce rotten to the bar construction in original concrete
Erosion, influences endurance quality.
At present, the low temperature patching material and arrangement and method for construction for severe cold area high ferro pedestal concrete still belong to blank.
The content of the invention
It is an object of the invention to provide a kind of severe cold area high ferro pedestal concrete low temperature patching material and its application, with gram
Pedestal that is not low temperature resistant or cannot undergoing bullet train operation initiation is followed after taking current extremely frigid zones high ferro pedestal concrete repair
Easily there is the problem of secondary peeling in the stress damage that ring shattering zone comes.
In order to solve the above technical problems, the technical solution adopted by the present invention is as follows：
A kind of severe cold area high ferro pedestal concrete low temperature patching material, its mass parts composition is as follows：425 normal silicates
Cement 30-300 parts, 425 sulphate aluminium cement 0-50 parts, 725 sulphate aluminium cement 0-300 parts, 0-30 parts of waterproof admixture, glue
Powder 5-35 parts, 630 parts of aggregate, water reducer 0.5-2.0 parts, construct 0.1-1.0 parts of modifying agent, water-loss reducer 0.1-0.5 parts, early strength agent
0-4 parts, 1-3 parts of multifunctional nano water-repelling agent, 0-1 parts of PP fibers.
Preferably, the mass parts composition of the patching material is as follows：425 275 parts of Portland cements, 425 sulphur aluminic acids
45 parts of salt cement, 725 0 part of sulphate aluminium cements, 20 parts of waterproof admixture, 30 parts of rubber powder, 630 parts of aggregate, 1.5 parts of water reducer,
0.5 part of modifying agent of construction, 0.2 part of water-loss reducer, 3.2 parts of early strength agent, 2 parts of multifunctional nano water-repelling agent, 0.5 part of PP fibers.
Further, on the basis of above-mentioned, the rubber powder is 6011A rubber powders, and the water reducer is water reducer F10.
Above-mentioned composition is plain edition severe cold area high ferro pedestal concrete low temperature patching material.
The present invention still further provides a kind of severe cold area high ferro pedestal concrete low temperature patching material of fast gravity die, institute
The mass parts composition for stating patching material is as follows：425 32 parts of Portland cements, 725 288 parts of sulphate aluminium cements, waterproof is mixed
Close 20 parts of material, 30 parts of rubber powder, 630 parts of aggregate, 1.5 parts of water reducer, construct 0.5 part of modifying agent, 0.2 part of water-loss reducer, early strength agent 0
Part, 2 parts of multifunctional nano water-repelling agent, 0.5 part of PP fibers.
Further, the rubber powder is 5044N rubber powders and 5010N rubber powders mass ratio is 1:2 mixture, the water reducer
It is water reducer F1.
Whether plain edition or soon gravity die, constituent part are preferably as follows：The waterproof admixture is dolomite dust；It is described
Construction modifying agent is 542 starch ethers, and the water-loss reducer is 400S water-loss reducers, and the early strength agent is calcium formate, many work(of nanometer
Can water-repelling agent beB1490, the PP fibers are the PP fibers of 6mm.
Described aggregate is quartz sand, and its level is with as follows：2.36mm 0-15%, 1.18mm 0-25%, 0.60mm 16-
40%, 0.30mm 55-85%, 0.15mm 90-100%, 0.075mm 90-100%, sieve bottom 90-100%；The aggregate
Modulus of fineness is 1.6-2.2.
Preferably, described grading of aggregates is as follows：1.18mm 0%, 0.60mm 35.19%, 0.30mm 70.83%,
0.15mm 96.66%, 0.075mm 99.96%, sieves bottom 100%；The modulus of fineness Mx of the aggregate is 2.03.
Above-mentioned level is compounded with choosing multiple quartz sand, and being not restricted to above-mentioned level in the present invention matches somebody with somebody, inventor
Find under study for action, compound the grading of aggregates that modulus of fineness Mx is 1.92 also possible.The present invention is from compounding modulus of fineness
For 2.03 aggregate because compounding particle it is slightly thick, coarse aggregate specific surface area is smaller, the parcel needed for reaching identical workability
Slurry is less, and can more suppress cracking resistance using coarse aggregate, therefore chooses 2.03 compounding result.
When in use, if be formulated using medium-sized patching material, the brushing interfacial agents preferably before repairing.
The mass parts composition of the interfacial agents is preferably as follows：
425 Portland cement 50-70 parts, stone flour 25-45 parts, 1-3 parts of 5044N rubber powders, 2-6 parts of 5010N rubber powders, water
10-30 parts.
Used again after being first well mixed with water when material for repairing is used, the mass parts that water is added are 100-160 parts.
The severe cold area high ferro pedestal concrete low temperature patching material that the present invention is provided is tried by laboratory and engineering site
Test, be amenable to the circulating freezing resistance of -40 DEG C of severe cold area, repairing for severe cold area high ferro pedestal concrete freeze thawing disease can be exclusively used in
Mend, specifically, it has advantages below：
1) compared with other conventional repair materials, the material operable time is sufficient (being more than 30min), and patching material belongs to
Early-strength, greatly shortens the engineering time (setting time 1h or so).High-speed railway night Window time typically only has 4h, removes
Go to reach the standard grade, offline and time, effective repair time only has 2-3h, it is therefore desirable to which patching material is strong needed for being reached in 2h
Degree.After low temperature patching material adds water, with setting time inversely, shortening setting time cannot then ensure can for operable time
Operating time, for the characteristic of high ferro, the present invention can greatly shorten the reparation construction time, ensure salvaging construction matter
Amount.
2) tensile bond strength between low temperature patching material and original concrete is high, and such as untreated stretch-bondeds of 28d are strong
Degree is more than 1.8MPa.In order to strengthen the tensile bond strength between patching material and original concrete, spy adds special ratios
Redispersable latex powder (i.e. the present invention in 6011A, 5010N, 5044N rubber powder), the present invention by the selection to rubber powder with
And the determination of ratio so that redispersable latex powder plays raising workability in fresh mortar, improves mobile performance, increases
Thixotroping and the function of anti-vertical property, improvement cohesive force, extension open hour and enhancing water-retaining property, can play raising in hardened mortar
Tensile bond strength, enhancing rupture strength, reduction elastic modelling quantity, raising deformability, wear-resisting intensity of promoting, raising cohesion are strong
Spend, reduce carbonation depth, reduce material water imbibition and make material that there is the function of the characteristics such as hydrophobicity.
3) excellent water resistance and low-temperature resistance Frozen-thawed cycled.The condition of concrete through freeze-thaw test has two：Water-saturated state,
Frozen-thawed cycled replaces, it can be seen that the water resistance for improving material is to improve a critically important approach of material frost resistance, in order to
Strengthen the water resistance of low temperature patching material, spy adds waterproof admixture and multifunctional nano water-repelling agent
B1490, multifunctional nano water-repelling agentB1490 is a kind of nanoscale dispersiveness sheet silicate material, be by
A kind of very thin disc shaped material composition, has fabulous dispersive property, because the material has crystalline substance in cement based system
The dioctahedron crystal structure of interior its swelling capacity, the swellability silicate of these stratiforms can form gel, and this structure is improved
The basic viscosity of system, enables the mortar have sag resistance, and the space of cement mortar is by this easily scattered nanoscale piece
The silicate crystal of shape is filled, and water mudrock structure is become fine and close, carries out rational gradation composition when aggregate is prepared in addition, it is ensured that
Hardened mortar has fine and close structure, improves water resistance, and then enhances low-temperature resistance Frozen-thawed cycled, low temperature patching material
Be more than 1.3MPa with the water-fast adhesion strengths of original concrete 28d, in -40 DEG C of Frozen-thawed cycleds 25 times, tensile bond strength still greater than
1.1MPa, the far superior to existing material property for carrying out freeze thawing test with -20 DEG C.
4) good workability and anti-cracking performance.In order to strengthen workability, spy adds a certain proportion of construction
Modifying agent, strengthens the sag resistance energy of patching material, improves application property, improves the apparent state of wet mortar, increases the product of mortar
Extracting rate and very economical；In order to increase the anti-cracking performance of patching material, spy adds a certain proportion of pp fibers (6mm),
Split with primarily serving resistance, antiseepage, durable and shock proof effect.These effects of fiber so that mix the patching material of fiber
Crack resistance enhancing, the ability of cracking resistance seam are improved, even if toughness enhancing, generation microcrack, the drawing for remaining to stand out against the external world is made
With.
5) low temperature patching material intensity matches with Matrix-concrete strength, and intensity is 40MPa or so.Patching material is strong
Degree grade is too high, and the Binder Materials volume in patching material proportioning is just increased considerably, and patching material shrinks increase, elastic modelling quantity
Increase, when constraining larger, easily ftractures；When constraining smaller, easy hollowing.
6) chloride ion content is low.
7) construction technology is simple, and repairing is convenient.The patching material is dry powder-shaped cement-based polymers material for repairing, onsite application
When only need in proportion be added into water and uniformly stirred and use, construction technology is simple, and repairing is convenient.
To sum up, the present invention compared with prior art, has the following advantages that：
A kind of severe cold area high ferro pedestal concrete low temperature patching material that the present invention is provided, the reparation construction time meets high
The requirement of iron Window time；Compression strength matches with pedestal concrete after the completion of aquation；Stretch-bonded with pedestal concrete is strong
Degree is high；Microdilatancy；- 40 DEG C of freeze thawing resistance circulation abilities are strong, be not in it is secondary come off, severe cold area is met well to high ferro
The requirement of pedestal concrete low temperature patching material.
Brief description of the drawings
Fig. 1 is the SEM figures after the patching material aquation 28d of embodiment 1；
Fig. 2 is the patching material distribution of pores figure of embodiment 1；
Fig. 3 is the rail bed plate efflorescence treatment construction schematic diagram of Site Detection part；
Fig. 4 is the photo that drawing head is broken at matrix；
Fig. 5 is the photo of the concrete bed by freeze-thaw damage.
Specific embodiment
Technical scheme, but protection scope of the present invention not limited to this are illustrated with specific embodiment below：
Multifunctional nano water-repelling agent selection in following examplesB1490。
Embodiment 1
A kind of plain edition severe cold area high ferro pedestal concrete low temperature patching material, mass parts composition is as follows：
425 275 parts of Portland cements, 425 45 parts of sulphate aluminium cements, 20 parts of waterproof admixture, 30 parts of rubber powder, bone
630 parts of material, 1.5 parts of water reducer, construct 0.5 part of modifying agent, 0.2 part of water-loss reducer, 3.2 parts of early strength agent, multifunctional nano water-repelling agent 2
Part, 0.5 part of PP fibers.
The rubber powder is 6011A rubber powders (being redispersable latex powder), and the water reducer is water reducer F10.
The waterproof admixture is dolomite dust；The construction modifying agent is 542 starch ethers, and the water-loss reducer is protected for 400S
Aqua, the early strength agent is calcium formate, and the PP fibers are the PP fibers of 6mm.
Described grading of aggregates is as follows：
Table 1
| Rectangular mesh | It is accumulative to tail over |
| 4.75mm | 0 |
| 2.36mm | 0 |
| 1.18mm | 0 |
| 0.60mm | 35.19 |
| 0.30mm | 70.83 |
| 0.15mm | 96.66 |
| 0.075mm | 99.96 |
| Sieve bottom | 99.99 |
| It is total | 100.00 |
The modulus of fineness Mx of the aggregate is 2.03.
Powder is mixed with water when using be can be used, the water quality part of addition is 135 parts.
But before repairing, in the position brushing interfacial agents to be repaired, the mass parts composition of the interfacial agents is preferably as follows：
425 60 parts of Portland cements, 34 parts of mineral admixture stone flour, 2 parts of 5044N rubber powders, 4 parts of 5010N rubber powders, 20 parts of water.Boundary
Face agent is also to be used after powder therein is mixed with water when using.
Fig. 1 is the SEM figures of the present embodiment patching material aquation 28d samplings.Fig. 1 (a) represents the C- produced in hardened paste
S-H gels, possess similar coralliform structure, and surrounding has and can intersect webbed bar-shaped gel and produce, and it is gelling
The main hydration products of material, are also the main source of patching material hardenite mechanical strength；Fig. 1 (b) shows waterproof admixture
Insert in microscopic void, improve the mechanical strength and endurance quality of gelinite；By Fig. 1 (c) as can be seen that in gelinite
At pore structure, the entringite for having column is generated, and its presence is effectively reduced volume of the repairing slurry in hardening process and receives
Contracting, is the main matter for ensureing patching material volume stability；Fig. 1 (d) displays, after repairing slurry hardening, generate more Ca
(OH)2, and these Ca (OH)2Intercalation among hydrated gel body, meanwhile, intersected between fibrous gelinite, even
Connect, constitute space net structure, increased the intensity of hardened paste.
In order to the pore character parameter of true reflection patching material, the patching material test block of water intakingization 28d is pressed
It is broken, its surface portion is gone, choosing qualified sample from sample core carries out distribution of pores experiment.Result is as shown in Figure 2.
In Fig. 2, the total body aperture of patching material is smaller.Learnt by analysis, patching material entirety porosity is 15.32%,
Most probable pore size is 31.22nm, and average pore size is 20.1nm, illustrates developed patching material entirety packing preferably, is met with
Extraneous rainwater, salt ion etc. can show preferable blocking statutes when corroding.
According to the big academician's proposition in Wuzhong for concrete pore rate and the criteria for classifying of hole level, concrete inner pore can divide
It is four kinds, is respectively：Aperture<20nm is harmless hole, and aperture 20nm-50nm is few harmful hole, and aperture 50nm-100nm is harmful hole,
Aperture>200nm is many evil holes.With reference to this standard, the ratio for developing patching material inhomogeneity type hole is as shown in table 2.
Aperture distribution proportion in the patching material of table 2
| Pore-size distribution | <20nm | 20nm-50nm | 50nm-100nm | >200nm |
| Ratio | 39.21 | 37.32 | 3.27 | 20.2 |
As can be seen from Table 2, harmless hole proportion is maximum in patching material, reaches 39.21%, is then followed successively by few evil
Hole, many evil hole and harmful hole, wherein harmless hole and doing harm to hole less and accounting for the overwhelming majority, ratio is up to 76.53%, and this is just illustrated, repairs
Material has good packing, and preferable defensive ability/resistance ability can be shown when severe rugged environment is met with.
Embodiment 2
A kind of fast gravity die severe cold area high ferro pedestal concrete low temperature patching material, mass parts composition is as follows：
425 32 parts of Portland cements, 725 288 parts of sulphate aluminium cements, 20 parts of waterproof admixture, 30 parts of rubber powder, bone
630 parts of material, 1.5 parts of water reducer, construct 0.5 part of modifying agent, 0.2 part of water-loss reducer, 0 part of early strength agent, multifunctional nano water-repelling agent 2
Part, 0.5 part of PP fibers.
Further, the rubber powder is 5044N rubber powders and 5010N rubber powders mass ratio is 1:2 mixture, the water reducer
It is water reducer F1.
The waterproof admixture is dolomite dust；The construction modifying agent is 542 starch ethers, and the water-loss reducer is protected for 400S
Aqua, the early strength agent is calcium formate, and the PP fibers are the PP fibers of 6mm.
Described grading of aggregates is with embodiment 1.
When using, powder is mixed with water, the mass parts of water are 116 parts.
Performance measurement：
1. physical and mechanical property
1.1 setting times (used coagulation time tester)
Carried out by the 5th chapter regulation in DL/T 5126-2001, it is specific as follows：
Test specimen (correspond to the powder that the present invention refers to embodiment 1 or 2 add water the compound that is made after mixing) is in wet curing
Maintenance extremely plus after mixing water starts measure for the first time in case during 30min.During measure, circle mould is taken out from wet curing case and is put into test point
Under, test point is contacted with net slurry face, loosen suddenly after tightening screw 1s~2s, test point Vertical Free sinks to net slurry, observes test point
Total indicator reading when stopping sinking.When test point is sink to away from base plate 2mm~3mm, as net slurry reaches pre-hardening state；When sinking does not surpass
For net slurry reaches final set state when crossing 1mm~0.5mm.Mixing water to the time of initial set, final set state is added to be respectively this by
The presetting period of net slurry and final setting time, are represented with hour (h) and point (min).Should be noted that initial measure operation should during measure
Metal bar is gently helped, makes its decline that blows slowly in case test point hits curved, but result should be defined by free-falling；In whole test process
The position of middle test point injection at least will be away from circle mould inwall 10mm.When closing on initial set, determined once every 5min, closed on every during final set
Determined once every 15min, should repeat to survey once immediately when reaching initial set or final set state, can be just set to when two times result is identical
Reach initial set or final set state.Must not determine and allow test point to fall into former pin hole every time, be completed every time test point must be cleaned and incite somebody to action
Circle mould is put back in wet curing case.To prevent from justifying mould vibrated in whole measurement process.
1.2 rupture strengths and compression strength (using testing machine of folding strength)
Carried out by the 9th chapter regulation in GB/T 17671-1999, it is specific as follows：
(1) rupture strength is determined
One side of examination body is placed on testing machine support cylinder, examination long axis of body is justified perpendicular to support cylinder by loading
Vertically be added in load on prism opposite flank with the rate uniform ground of 50N/s ± 10N/s by post, until fractureing.
Two half prisms are kept to be in dampness until compression test.
Rupture strength Rf is represented with Newton per square millimetre (MPa), calculated by formula (1)：
In formula：The load in the middle part of prism, N are put on during Ff-fracture；
The distance between L-support cylinder, mm；
The length of side of b-prism square section, mm.
Using the average value of the anti-folding result of one group of three prism as result of the test.Exceed average when having in three intensity levels
During value ± 10%, averaged again as rupture strength result of the test after should rejecting.
(2) compressive strength determination
Compressive strength test is carried out by the instrument for specifying on the side of half prism.
Half prism center should be in ± 0.5mm with pressure plate of press machine compression central lid, and prism is exposed at outside pressing plate
Part there are about 10mm.
With the rate uniform ground loading of 2400N/s ± 200N/s until destruction in whole loading process.
Compression strength R.It is beast position with Newton per square millimetre (MPa), is calculated by formula (2)：
In formula：Fc --- peak load during destruction, N；
A --- part in compression area, mm2 (40mm × 40mm=1600mm2).
The arithmetic mean of instantaneous value of the six compressive strength determination values obtained on one group of three prism is result of the test.
As having one in six measured values beyond six ± the 10% of average value, this result should be just rejected, and with remaining
The average of five is result.If having more than their average ± 10% in five measured values again, this group of result is cancelled.
Above-mentioned resistance to compression, the shaping of rupture strength test specimen are carried out by chapter 7 regulation in GB/T17671-1999.1.3 stretchings are viscous
Knotting strength
The shaping of tensile bond strength and measure are carried out by the regulation of chapter 5 in JC/T 907-2002, specific as follows：
(1) untreated tensile bond strength sample：30S is pressed with 1.6Kg ± 15g weights after bonding, sample size is every group
At least 10, the shear strength of the single test specimen of test result is accurate to 0.01MPa.As single test specimen intensity level and average value it
Difference is more than 20%, then gradually reject the maximum test value of deviation, until the difference of each test value and average value is no more than 20%, it is such as surplus
Remainder is according to being no less than 5, then result is represented with remaining average value, is accurate to 0.1MPa, invalid less than 5.
(2) immersion treatment sample：Conserved 7 days under standard test conditions, be then fully immersed in 23 ± 2 DEG C of water, 6
Taken out from water after it and the dry surface that uses cloth to wipe with is water stain, glue drawing joint, 24h in water is placed into after 7h, determine intensity.
1.4 shrinkage factors
Should be by JGJ/T70-2009《Building mortar basic performance tests method standard》12nd chapter is carried out, specific as follows：
After determining initial length, test specimen should be placed in 18-22 DEG C, the interior of relative humidity 55-65%, then 7d,
14d, 21d, 28d, 56d, 90d determine the length of test specimen.
The contract with dry rate of material each age is calculated using formula (2-1)：
In formula：The contract with dry rate of test block when St is t；
L0It is the length of test block forming 7d, i.e. initial length, mm；
Test specimen measurement length, mm when Lt is t.
The performance indications of the embodiment 1 and 2 of experimental determination are carried out according to the above method, table 3 is referred to.
Inspection performance in the Lab Products of table 3
2. the study on frost-resistance of patching material
The loss of strength rate of frost resistance is with mass loss rate test method with reference to JGJ/T70-2009《Building mortar basic nature
Can test method standard》Tested, specimen molding size is 40mm*40mm*160mm.
Test specimen should carry out freezing-thawing test in 28d ages, and experiment a few days ago, should be by freeze thawing test specimen and contrast specimen from maintenance
Room is taken out, and is carried out outward appearance and is detected and record original condition, is subsequently placed into immersion in 15-20 DEG C of water, and the water surface of immersion should be at least
Higher than test specimen top surface 20mm, freeze thawing test specimen takes out two days later in immersion, and gently wipes surface moisture with the wet towel wrung out, so
Freeze thawing test specimen is numbered afterwards, claims its quality, then inserting refrigerator carries out freezing-thawing test, and contrast specimen is then put into standard curing
Case continues to conserve, after completing Frozen-thawed cycled, with the pressure testing simultaneously of freeze thawing test specimen.
Test specimen solidification point should be controlled at -40 DEG C to -35 DEG C, and when ice the temperature inside the box is less than -35 DEG C, test specimen can be put into,
After test specimen is put into, when temperature is higher than -35 DEG C, the freeze-off time of calculation testing piece when -35 DEG C should be again down to temperature, from dress
The time that complete test specimen is down to -35 DEG C to temperature again is not to be exceeded two hours.
Each freeze-off time should be 4h, and test specimen should be immediately taken out after the completion of freezing, and should be immediately placed in can keep water temperature
Melted in 15-20 DEG C of tank, the tank water surface should be at least above surface of test piece 20mm, the time that test specimen melts in water
It is set to 5h, thawing is finished as a Frozen-thawed cycled, takes out test specimen, and gently wipes surface moisture with the wet towel wrung out, and is sent
Entering refrigerator carries out cyclic test next time, and (this experiment untill the number of times or test specimen of design code are destroyed is carried out continuously according to this
Freezing-thawing cycles are 10 times, 20 times, 30 times, 40 times, 50 times).
Every five circulations, carry out an outward appearance and detect, and record the destruction situation of test specimen, go out when there is two in this group of test specimen
Now substantially be layered, split, insertion seam etc. destruction when, test specimen anti-freezing property experiment should terminate.
After freeze thawing terminates, freeze thawing test specimen is taken out from tank, gently wipe surface moisture with the wet towel wrung out, then
Claim its quality, contrast specimen is carried and a few days ago soaked.
Freeze thawing test specimen and contrast specimen should be carried out compressive strength test simultaneously.
Mortar strength loss late is calculated as follows：
△fm=(fm1-fm2)/fm1*100
△fmIt is the loss of strength rate (%) of mortar specimen after n Frozen-thawed cycled, is accurate to 1%.
fm1It is the compression strength average value (MPa) of contrast specimen.
Fm2It is through three pieces of arithmetic mean of instantaneous values of test specimen compression strength (MPa) after n Frozen-thawed cycled.
Mass loss rate after mortar specimen freeze thawing should be calculated as follows：
△mm=(m0-mn)/m0*100
△mmIt is the mass loss rate (%) of mortar specimen after n Frozen-thawed cycled, is calculated with 3 pieces of arithmetic mean of instantaneous values of test specimen
(%), is accurate to 1%.
m0Test specimen quality (g) before-freeze-thaw cycle experiment.
mn- after n Frozen-thawed cycled test specimen quality (g).
The tensile bond strength assay method of Frozen-thawed cycled is with reference to JC/T907-2002《Concrete interface treating agent》, simply
Sharp freezing temperature is set as -40 DEG C.
The freezing-thawing test result of embodiment 1 (being represented with 1# below) and embodiment 2 (being represented with 2# below) patching material is such as
Shown in table 4 below.
Table 4
Be can be seen that by upper table 4：
(1) with the increase of cycle-index, the mechanical strength of 1#, 2# patching material is gradually reduced.Water is by penetrating into base
After body, solidification icing is carried out at low ambient temperatures, can also produce certain freezing and expansion, icing pressure occur, cause matrix knot
The further destruction of structure, the mechanical strength for being eventually exhibited as test block decreases.But find simultaneously, by 10 Frozen-thawed cycleds
When, the compression strength of test block reduces 3.61%, 1.49% respectively, and after 40 circulate, strength retention still can reach
83.37%th, 87.57%, this explanation patching material has good density, can preferably hinder the jelly of extraneous low temperature environment
Melt.
(2) when freezing-thawing cycles are identical, the performance of 2# patching materials is generally better than 1# patching materials.
It is above-mentioned to be for determining the curing condition of the test specimen of performance：
7d ages conserve：It is immediately placed in after specimen molding under the conditions of standard curing and conserves 7d, wherein the 24h demouldings.
28d ages conserve：To conserve be put under standard test conditions after 7d under the conditions of test specimen standard curing and conserve 21d again.
Standard laboratory conditions：Temperature (20 ± 2 DEG C), relative humidity 45-75%；
Standard curing condition：Temperature (20 ± 2 DEG C), relative humidity is not less than 95%.
3. polymer material for repairing field test
3.1 materials prepare
Three kinds of materials of this Preparatory work of experiment
1# polymer material for repairing 80Kg, are divided into 8 parts, every part of 10Kg, plastic bag packaging.
2# polymer material for repairing 80Kg, are divided into 8 parts, every part of 10Kg, plastic bag packaging.
Interfacial agents 5Kg, plastic bag packaging.
3.2 construction equipments
3.2.1 base treatment instrument
Minitype gas dynamotor 1, electric socket one, electronic shot-blasting machine or other concrete feather plucking equipment 1, steel wires
2, brush, work portable lighter 1, some flashlights, the handle of broom 1, the handle of refuse hopper 1,20L plastic water bottles 2,1, watering can of watering.
3.2.2 construction equipment
Handheld electric stirrer 1, electronic scale 1,2, thermometer, agitator 1,1, bucket of weighing, plastics
1, beaker, hot water electric heater 2, the handle of spatula 2, marking pen 2, the handle of Steel Ruler 1,1, camera, two-sided tape are some, hand
Hold formula concrete cutting machine 1.
3.2.3 detecting instrument
Live drawing instrument 1, concrete bouncing back instrument 1.
3.3 personnel arrangements
The people of basic unit's wharf's pavement quality 2, weighing, stirring, batch scrapes 2 people, the people of on-the-spot record 1.
3.4 construction organizations
In view of construction 0 point to 4 points at night of window phase, the time is short, and temperature is low, and sight line is bad, all construction equipments and
Material should be transported near job site in advance, and one arrives zero point, and personnel and tool materials will timely enter the scope of operation, evolutionary operation.
3.5 construction procedures
1. experiment prepares：After construction window is opened, the equipment and instrument needed for construction are transported to region to be repaired, carried out
Preparation before construction.
2. base treatment：It is determined that needing the region of repairing, the damaged waste residue and dust stratification on top are first cleared away, with steel ruler and mark
SD repairing position (attention mark repair site area should be greater than region to be repaired), is vertically cut with electric slicer along graticule
Faulting of slab ends is cut into, depth should be not less than 5mm, polishing is first carried out to the concrete base layer inside faulting of slab ends with electronic shot-blasting machine draws mill, clearly
Greasy dirt, the efflorescence layer of substrate surface are removed, exposes firm sandstone aggregate, loose basic unit position should all be rejected, then
Cleaned, surface can not have floating dust, cleaning to be tested again and cleared up with steel brush after finishing, it is ensured that concrete base layer treatment
Totally, basic unit, when not having bright water, next process of being allowed for access finally are moistened with watering watering can.
3. brushing interfacial agents, the mass parts composition of the interfacial agents is as follows：425 60 parts of Portland cements, mineral are mixed
Close 34 parts of material, 2 parts of 5044N rubber powders, 4 parts of 5010N rubber powders, 20 parts of water.
4. weighing and stirring：15Kg material for repairing is weighed every time, then in proportion load weighted water (each 2.009Kg of 1#
Water, each 1.732Kg water of 2#) agitator is added, powder is added, with electric mixer high-speed stirred 5 minutes, cure 2 minutes
Afterwards, then slightly stir and can be used.
5. slurry batch is scraped：The slurry being stirred, it is poured in washcoat, it is firmly floating with batch knife, light is received, it is unnecessary
Slurry should clean out in time.
6. conserve：1# plain edition material for repairing natural curings；After the initial set of 2# material for repairing, should sprinkle water in time, curing time
With to when withdrawing.
7. scene cleaning：After construction is finished, timely site clearing, in order to avoid cause road surface to pollute, and whether checking tool is lost
Leakage.
3.6 Site Detections
Bedplate is repaired and detection position is as shown in Figure 3.In Fig. 3, different zones position and use treatment it is as follows：
The left stock 1# material for repairing repairing brush interfacial agents of the 44th block of plate of the descending K331 of 1-
The left stock 1# material for repairing of the 44th block of plate of the descending K331 of 2- repairs non-brush interfacial agents
The left stock 2# material for repairing of the 38th block of plate of the descending K331 of 3- repairs non-brush interfacial agents
The right stock 1# material for repairing repairing brush interfacial agents of the 38th block of plate of the descending K331 of 4-
The right stock facade 1# material for repairing repairing brush interfacial agents of the 38th block of plate of the descending K331 of 5-
The left stock 2# material for repairing of the 58th block of plate of the up K331 of 6- repairs non-brush interfacial agents
7th, 8,9,10- contrast districts, do not make any treatment
3.6.1 the pressure resistance of 1,2,3 region 7d, 28d, 120d is made of concrete bouncing back instrument and tensile bond strength drawing instrument
Degree and the compression strength value in tensile bond strength and 7,8,9,10 regions.(snowed after construction 2d, the without window phase, it is impossible to measure 3d
When compression strength and tensile bond strength.)
3.6.2 7d, 28d, 120d repairing area surface appearance are observed, if having hollowing cracking phenomena.
Note：On November 03rd, 2015 carries out field patch experiment, and November 06 was lower first snow, the Liaoyang Region lowest temperature
Start to be down to less than 0 DEG C, repairing area concrete enters the Frozen-thawed cycled phase in winter immediately, go up at the bottom of 2 months temperature, patch area
Domain concrete enters the warm Frozen-thawed cycled phase in spring, is limited to the limitation of actual high ferro skylight phase, selected from 7d after repairing experiment, 28d,
120d enters repairing collection in worksite test data, observation repairing area surface appearance.
3.7 repairing site test results analyses
3.7.1 tensile bond strength
Tensile bond strength gatherer process is as follows：First in repairing area, 40*40mm lines are drawn, base cuts out 40*40mm
Lattice, then paste drawing head, and drawing head is gluing to be heating and curing, and carries out tensile bond strength measure.The drawing in the region of patch area 1,2,3
Stretch adhesion strength value as shown in table 5 below.
The tensile bond strength value of table 5
In tensile failure experiment, its destruction interface must occur in following three kinds of situations：Inside original concrete, matrix
At the bonding interface of concrete/material for repairing, inside material for repairing.If destruction interface illustrates material for repairing internal junction inside material for repairing
Structure is weaker, and the repair efficiency to concrete substrate is poor, if destruction occurs the bonding interface in original concrete/material for repairing
Place, illustrates that the interface binding intensity of original concrete/material for repairing is relatively weak, if destruction interface is appeared in concrete substrate,
Illustrate that material for repairing repair efficiency is preferable.
Interface is destroyed when can be seen that 7d by the tensile bond strength data in above-mentioned No. 1 region and appears in original concrete
At the bonding interface of material for repairing, adhesion strength should be 0.346MPa, interface is destroyed during 28d and is appeared in concrete substrate, repair
Feed supplement should be greater than 0.557MPa with the adhesion strength of concrete, interface is destroyed during 120d and is appeared in concrete substrate, material for repairing
Adhesion strength with concrete should be greater than 0.256MPa.
Wherein one destruction interface appears in mixed when can be seen that 7d by the tensile bond strength data in above-mentioned No. 2 regions
At the bonding interface of solidifying soil and material for repairing, material for repairing should be greater than 0.849MPa with the adhesive strength of concrete substrate at another two, should
Region material for repairing should be 0.696MPa with the adhesion strength of concrete substrate, interface is destroyed during 28d and is appeared in concrete substrate,
Material for repairing should be greater than 0.502MPa with the adhesion strength of concrete, interface is destroyed during 120d and is appeared in concrete substrate, repair
Material should be greater than 0.264MPa with the adhesion strength of concrete.
Wherein one destruction interface appears in mixed when can be seen that 7d by the tensile bond strength data in above-mentioned No. 3 regions
At the bonding interface of solidifying soil and material for repairing, material for repairing should be greater than 0.441MPa with the adhesive strength of concrete substrate at another two, should
Region material for repairing should be 0.436MPa with the adhesion strength of concrete substrate, interface is destroyed during 28d and is appeared in concrete substrate,
Material for repairing should be greater than 0.759MPa with the adhesion strength of concrete, interface is destroyed during 120d and is appeared in concrete substrate, repair
Material should be greater than 0.400MPa with the adhesion strength of concrete.
Consider from tensile bond strength, the repair efficiency in No. 3 regions is better than No. 1 and No. 2 regions.
Partial data is relatively low in table, is on the one hand that cement early stage aquation is suppressed, another due to northeast winter construction
Aspect original concrete winter is circulated destruction by thawing, and cohesive force is poor between internal structure, when by tension very
Easily destroyed.
The drawing head that is broken at matrix is as shown in figure 4, the bonding of material for repairing and concrete substrate as can be seen from Figure
Preferably, the coarse aggregate in part of matrix concrete is pulled out intensity.From the point of view of tensile bond strength, polymer material for repairing is to matrix
The repair efficiency of concrete is preferable.
3.7.2 compression strength
1st, the compression strength value in 2,3,7,8,9,10 regions is as shown in table 6 below.
The compression strength value of table 6
| 7d/MPa | 28d/MPa | 120d/MPa | |
| 1 | 24.9 | 30.0 | 31.8 |
| 2 | 20.3 | 28.2 | 30.5 |
| 3 | 18.9 | 28.2 | 29.5 |
| 7 | 20.3 | 20.3 | 18.9 |
| 8 | 14.9 | 14.9 | 13.7 |
| 9 | 20.3 | 20.3 | 18.9 |
| 10 | 20.3 | 20.3 | 18.9 |
From data in table：
1) the surface compression strength of original concrete is very low, only 20MPa or so, and No. 8 regions are even as low as 15MPa.Base
The design strength of body concrete is 40MPa, significantly larger than measured value, freeze-thaw damage of the part because of concrete：Work as concrete
When ponding occurs in surface, moisture can be residing around concrete component along surface microscopic hole or surface crack endosmosis
Environment is begun to decline when below zero degrees celsius, and negative temperature Surface Structures first are influenceed, concrete component from surface by
Freezeout gradually takes place so that surface texture becomes fragile, so that negative temperature surface gradually from concrete is to inside it
Structure is permeated, now the freezeout in concrete surface gradually increases, and over time, Frozen-thawed cycled enters
OK, the inside of concrete component is also gradually destroyed.The reason for concrete component is destroyed, after all precisely due to temperature
Reduce, water build-ups ice, the water of identical weight becomes the volumetric expansion that ice has 9%, cause concrete when freezing, in it
The phenomenon that volume is constantly expanded will occur so that the moisture that concrete the inside does not freeze also when the water in portion is due to glaciation
Son is pressed into the also unsaturated capillary channel in inside due to extraneous volumetric expansion.The temperature of concrete component external environment condition
When continuing to decline, inside concrete just has more water and build-ups ice, and volume will increasingly expand, therefore inside concrete institute
The compression that the hydrone not frozen also for existing bears will be increasing, when these hydrones not freezed nowhere flow again
When dynamic, the capillary channel of inside concrete will be made to bear increasing compression, when this compression reaches to a certain degree
When finally reaching the limit, inside concrete will be made because will expand to outside concrete when cannot bear this compression
Dissipate, so that concrete produces fracture phenomena, and this will cause inside concrete to produce substantial amounts of microcrack, finally result in whole
There is freeze-thaw damage in concrete component.
2) the apparent compression strength in 7,9,10 regions repair age be 7d and 28d when be 20.3MPa, repairing age be
18.9MPa is reduced to during 120d, the apparent compression strength in 8 regions is 14.9MPa when age is repaired for 7d and 28d, repairs age
Phase is reduced to 13.7MPa when being 120d, and on the whole with the extension of repairing age, the apparent compression strength of non-repairing area occurs
Decline.It can thus be seen that by 4 months winters, the apparent compression strength of original concrete occurred in that slight decline, one
Partially due to winter part freeze-thaw damage, another part is the use position due to its uniqueness.
3) the surface compression strength in 1,2,3 regions increases very fast with the extension early stage of repairing age, and the later stage increasess slowly, by
Gradually tend towards stability, the change procedure of this surface compression strength of material for repairing is that the forming process for having its network structure is determined.
The network structure of polymer material for repairing forms process and can be divided into following four-stage：
First stage, polymer is incorporated into cement mortar, polymer beads are agitated to be evenly dispersed in mortar,
Form the homogeneous mixed system of polymer cement mortar；Add water and mixed and stirred, as Binder Materials occurs hydration reaction, cement gel
Gradually form, hydrated product calcium hydroxide progressivelyes reach its saturation state, slurry reclaimed water is absorbed because cement occurs hydration reaction
Point, cause polymer beads to dry out and be deposited on the gel particle surface of hydrated cementitious formation.
Second stage, as the hydration reaction of Binder Materials is further carried out, the gel structure of hydrated product is initially formed,
Polymer beads are then limited in gel structure and cement and aggregate void among particles, the hydration reaction of cement continue into
Row causes polymer further dehydration, and polymer beads start to occur piling up to flocculate together.(the space in mortar slurry
Size is mostly between 0.2-2 μm, and the size of polymer particles is more between 0.05-0.5 μm, it is possible in thinking slurry
Space filled by polymer beads.)
Phase III, with constantly carrying out for hydrated reaction of cement, the polymer particles intergranular flocculation being packed together, moisture
To be all absorbed in hydrolysis product of cement and form a junction the polymer beads filled between Heshui, final space and condense completely
Continuous strip, membrane structure are formed together, their inter-adhesive formation space net structures, filling, covering hole and hair
Thin passage or play bridge formation connection function across gap.
Fourth stage, by hydrolysis product of cement, cement between polymer mesh while polymer space web frame is formed
Grain, aggregate etc. are filled, and hydrated gel product is intertwined to form the interspersed intertexture web frame in engaged space with polymer；Water
Change the rigid space web frame that product formed and play decisive role to the main body intensity of mortar, and with the flexibility of its interspersed intertexture
Polymer space web frame is played to gather and pulled and connection function, because two kinds of structures mutually fill space, reduces the presence in space,
Internal flaw is compensate for, while the cohesive force of entirety is also improved, so that the intensity of mortar is strengthened.
The stirring that adds water of polymer material for repairing batch is scraped in after original concrete, the Binder Materials early stage aquation in material for repairing compared with
Hurry up, gain in strength is very fast, and with the carrying out of aquation, unhydrated Binder Materials is fewer and feweri, aquation is also increasingly slower, and intensity increases
It is long slow, and gradually tend towards stability, the later stage is held essentially constant, and simply slightly increases.
3.7.3 surface appearance
By observing the surface appearance of 7d, 28d, 120d repairing area, and repairing area is gently tapped with hand hammer, inspection is repaiied
Effect is mended, phenomenon of the repairing face without any crack, hollowing and cracking is found, illustrates that the repair efficiency of 1# and 2# patching materials is good
It is good.
Observed by repairing area onsite surface situation, repairing area on-site data gathering and analysis draw, 2# repairing materials
The repair efficiency of material is better than 1# patching materials, in order that original concrete is combined more preferably with 1# material for repairing, and makes critical surface not
Hollowing phenomenon is produced, is needed to pedestal concrete surface brushing interfacial agents before batch 1# material for repairing is scraped.
Claims (10)
1. a kind of severe cold area high ferro pedestal concrete low temperature patching material, it is characterised in that its mass parts composition is as follows：425
Portland cement 30-300 parts, 425 sulphate aluminium cement 0-50 parts, 725 sulphate aluminium cement 0-300 parts, waterproof is blended
0-30 parts of material, rubber powder 5-35 parts, 630 parts of aggregate, water reducer 0.5-2.0 parts, construct 0.1-1 parts of modifying agent, water-loss reducer 0.1-0.5
Part, early strength agent 0-4 parts, 1-3 parts of multifunctional nano water-repelling agent, 0-1 parts of PP fibers.
2. severe cold area high ferro pedestal concrete low temperature patching material as claimed in claim 1, it is characterised in that the repairing
The mass parts composition of material is as follows：425 275 parts of Portland cements, 425 45 parts of sulphate aluminium cements, waterproof admixture 20
Part, 30 parts of rubber powder, 630 parts of aggregate, 1.5 parts of water reducer, 0.5 part of modifying agent of constructing, 0.2 part of water-loss reducer, 3.2 parts of early strength agent is received
2 parts of rice multi-functional, hydrophobic agent, 0.5 part of PP fibers.
3. severe cold area high ferro pedestal concrete low temperature patching material as claimed in claim 2, it is characterised in that the rubber powder
It is 6011A rubber powders, the water reducer is water reducer F10.
4. severe cold area high ferro pedestal concrete low temperature patching material as claimed in claim 1, it is characterised in that the repairing
The mass parts composition of material is as follows：425 32 parts of Portland cements, 725 288 parts of sulphate aluminium cements, waterproof admixture 20
Part, 30 parts of rubber powder, 630 parts of aggregate, 1.5 parts of water reducer, construct 0.5 part of modifying agent, 0.2 part of water-loss reducer, 0 part of early strength agent, nanometer
2 parts of multi-functional, hydrophobic agent, 0.5 part of PP fibers.
5. severe cold area high ferro pedestal concrete low temperature patching material as claimed in claim 4, it is characterised in that the rubber powder
For 5044N rubber powders and 5010N rubber powders mass ratio are 1:2 mixture, the water reducer is water reducer F1.
6. the severe cold area high ferro pedestal concrete low temperature patching material as described in claim 1-5 is any, it is characterised in that institute
Waterproof admixture is stated for dolomite dust；The construction modifying agent is 542 starch ethers, and the water-loss reducer is 400S water-loss reducers, described
Early strength agent is calcium formate, and the PP fibers are the PP fibers of 6mm.
7. severe cold area high ferro pedestal concrete low temperature patching material as claimed in claim 6, it is characterised in that described bone
Expect to be quartz sand, its level is with as follows：2.36mm 0-15%, 1.18mm 0-25%, 0.60mm 16-40%, 0.30mm 55-
85%, 0.15mm 90-100%, 0.075mm 90-100%, sieve bottom 90-100%；The modulus of fineness of the aggregate is 1.6-
2.2。
8. severe cold area high ferro pedestal concrete low temperature patching material as claimed in claim 7, it is characterised in that described bone
Material level is with as follows：1.18mm 0%, 0.60mm 35.19%, 0.30mm 70.83%, 0.15mm 96.66%, 0.075mm
99.96%, sieve bottom 100%.
9. the application of any severe cold area high ferro pedestal concrete low temperature patching materials of claim 1-8, it is characterised in that
It is well mixed with water when using and is used, the mass parts that water is added is 100-160 parts.
10. the application of Claims 2 or 3 or any severe cold area high ferro pedestal concrete low temperature patching materials of 6-8, it is special
Levy and be, carry out repairing preceding brushing interfacial agents, the mass parts composition of the interfacial agents is as follows：
425 Portland cement 50-70 parts, stone flour 25-45 parts, 1-3 parts of 5044N rubber powders, 2-6 parts of 5010N rubber powders, water 10-
30 parts.
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