CN108774033A - A kind of high-strength micro- contraction highway crack mud jacking mortar and highway maintenance method of flowing automatically - Google Patents
A kind of high-strength micro- contraction highway crack mud jacking mortar and highway maintenance method of flowing automatically Download PDFInfo
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- CN108774033A CN108774033A CN201810640624.8A CN201810640624A CN108774033A CN 108774033 A CN108774033 A CN 108774033A CN 201810640624 A CN201810640624 A CN 201810640624A CN 108774033 A CN108774033 A CN 108774033A
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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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/005—Methods or materials for repairing pavings
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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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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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
- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
A kind of flow automatically high-strength micro- contraction highway crack mud jacking mortar and highway maintenance method, belong to road and bridge field.Mortar is mainly made of cementitious material, aggregate, additive.Wherein, cementitious material is mainly made of portland cement, sulphate aluminium cement, flyash and silicon ash；Aggregate includes one or more in river sand, CHARACTERISTICS OF TAILINGS SAND and building solid castoff, and granularity is 0.3~0.5mm；Additive includes swelling agent, water-reducing agent, retarder, water and optional thickener, optional antifoaming agent.Mortar in the present invention has fluidity height, intensity height, has micro- contractile function, can be utilized to preferably maintain public highway.
Description
Technical field
The present invention relates to road and bridge field, in particular to a kind of high-strength micro- contraction highway crack mud jacking mortar of gravity flow and
Highway maintenance method.
Background technology
The highway in China most (>=90%) is to use bituminous paving.Although this road surface has many good qualities,
But there are one most apparent disadvantages, be exactly in use it is possible that many cracks, go back no matter base is flexibility
It is semirigid, can not all avoids the appearance of crack problem.Once and there is crack in bituminous paving, moisture can be penetrated into crack
Base declines so as to cause road surface bearing capacity or the serious plant diseases such as depression, pit slot, bleeding is caused to occur, and then direct shadow
Ring the service life and safety of highway.
Road surface multiple diseases-such as crack, protrusion, bellding, it is loose-in it is most universal and harmfulness is maximum is exactly
Crack.Crack can not only seriously affect the whole perception of highway, can also substantially reduce the degree of balance of road so as to cause vehicle
It jolts, while can also shorten the service life of road.After road surface is split, rainwater will flow to the bottommost on road surface from gap,
Cause way of concrete foundations corrosive damage occur under the immersion of prolonged rainwater, seriously destroys road.Therefore, research is public
The control measure in road crack are very necessary.
Currently, the method for carrying out repairing maintenance to all kinds of cracks is mostly more with the mud jacking cementation of fissures.Mortar exists in the prior art
Such as the problems such as intensity is not high, repairing effect is bad, need to carry out upgrading update.
The information for being disclosed in the background technology part is merely intended to deepen understanding of the general background technology to the present invention, and
It is not construed as recognizing or implying in any form that the information constitutes the prior art known to those skilled in the art.
Invention content
Based on the deficiencies of the prior art, the present invention provides a kind of high-strength micro- contraction highway crack mud jacking mortar of gravity flow and public affairs
Road maintenance process, partly or entirely to improve, even solve problem above.
The invention is realized in this way：
In a first aspect, an embodiment of the present invention provides a kind of high-strength micro- contraction highway crack mud jacking mortars of gravity flow.
Mortar provided in an embodiment of the present invention is a kind of material that can be used for maintaining public highway by mud jacking operation.Mortar
The ratio of mud be 0.25~0.35, fluidity be more than 280mm.
Mortar is mainly made of additive and material of main part.Material of main part includes according to mass percent meter with the following group
Point：Cementitious material 30~60%, aggregate 40~70%.The 5~27% of quality of materials based on the dosage of additive.
Wherein, cementitious material is mainly made of portland cement, sulphate aluminium cement, flyash and silicon ash；Aggregate packet
Include it is one or more in river sand, CHARACTERISTICS OF TAILINGS SAND and building solid castoff, and granularity be 0.3~0.5mm；Additive includes swollen
Swollen dose, water-reducing agent, retarder, water and optional thickener, optional antifoaming agent.
In second aspect, an embodiment of the present invention provides a kind of highway maintenance methods.
Highway maintenance method is mainly to be implemented using above-mentioned mortar.Maintenance process includes the side by the mud jacking cementation of fissures
In formula aforementioned mortar injection to the crack of highway and cure.
Advantageous effect：By using water-reducing agent (diminishing technology), silicon ash (micro mist skill in mortar provided in an embodiment of the present invention
Art), swelling agent, cementitious material, aggregate it is reasonably combined, 0.25~0.35, fluidity is more than 280mm, applies for ratio of mud control
Work is functional；Also there is the material property that slurry intensity is high, dry contraction is small, is conducive to the maintenance of pavement crack.
Specific implementation mode
Embodiment of the present invention is described in detail below in conjunction with embodiment, but those skilled in the art will
Understand, the following example is merely to illustrate the present invention, and is not construed as limiting the scope of the invention.It is not specified in embodiment specific
Condition person carries out according to conventional conditions or manufacturer's recommended conditions.Reagents or instruments used without specified manufacturer is
The conventional products that can be obtained by commercially available purchase.
However existing grouting material, there is also some such as poor fluidities, intensity is not high the problems such as.In view of this, inventor
A kind of new mortar is proposed, so as to At at least one aspect to obtaining the performance better than existing mortar.
It is specifically described below for a kind of mortar and highway maintenance method of the embodiment of the present invention：
An embodiment of the present invention provides a kind of mortars for being conserved to highway, although, in embodiments of the present invention,
The use-case of mortar is with highway as an example, it should be understood, however, that mortar is in buildings such as different types of rridges road surface, walls
Crack repair, all have potential application value in maintenance project.
The invention is intended to provide it is a kind of have after good mobility, intensity high (especially early strength is high), solidification after
The construction material of the gelling type of micro- contraction.And in practice, it is proposed that it is a kind of as be shown in the examples and mortar, compared to
Used mud jacking cementation of fissures mode achieves ideal performance above at least one aspect in the prior art.
The ratio of mud of mortar provided in an embodiment of the present invention is that 0.25~0.35, fluidity is more than 280mm.Typically,
There are considerable degree of influences on the intensity of mortar and fluidity for the ratio of mud.And the intensity and fluidity of mortar imitate its cementation of fissures
Fruit also important influence.In the present embodiment, the ratio of mud is in terms of the mass ratio of water and gum material and powder.
The mortar that the embodiment of the present invention is provided, by the reasonable distribution for controlling water-reducing agent, cement substance and aggregate
It uses, controls its fluidity, keep its fluidity more reasonable, to be more easy to be filled into gap, the ratio of mud, silicon ash, flyash
It adjusts and the use of aggregate keeps the intensity after its solidification more preferable.Being used cooperatively for the additives such as swelling agent and retarder can make
It cures the volume contraction after drying and is suppressed, to the function of keeping gap to repair.
Mortar is mainly made of additive and material of main part.Wherein, material of main part include according to mass percent meter with
Lower component：Cementitious material 30~60%, aggregate 40~70%.The 5~27% of quality of materials based on the dosage of additive.
Preferably, material of main part includes cementitious material 35~55%, aggregate 45~65%.
Wherein, the main component of cementitious material is cement, and in the present invention is implemented, cementitious material is mainly by silicate cement
Mud, sulphate aluminium cement, flyash and silicon ash composition.Two kinds of portland cement, sulphate aluminium cement cement mixing system tools
There is early strong, high-strength, microdilatancy function.After aquation, in hydrolysis product of cement, the amount of ettringite phase is more, can effectively improve slurry
The early strength of body can realize quick-drying, and aquation result generates microdilatancy so as to reduce dry contraction.Flyash and silicon
The use of grey micro mist can make the grading of mortar more reasonable, contribute to the raising of water-reducing effect, fluidity and intensity.
Based on actual requirement of engineering, the selection of cementitious material can be carried out according to following manner.Portland cement meets
The associated specifications of GB 175-2007 common portland cement standards.Low alkalinity aluminate cement meets JC/T659-1997
Technology requirement.Flyash meets the regulation of fine coal gray technology requirement in GB/T1596-2017.Silicon ash meets GB/T27690-
The regulation that silicon ash technology requires in 2001.With the update of standard, above-mentioned material will meet the requirement of more new standard.
Aggregate include it is one or more in river sand, CHARACTERISTICS OF TAILINGS SAND and building solid castoff, and granularity be 0.3~
0.5mm.Aggregate employed in the embodiment of the present invention is a kind of fine aggregate, the grading of mortar can be made more reasonable, and simultaneously
Positive effect can also be generated for the intensity after mortar solidification.Wherein river sand may be used fineness modulus 2.3~3.0 and be preferably
2.5 middle sand, average grain diameter substantially 0.35~0.5mm.The selection of aggregate preferably conforms to GB/T14684-2011 buildings
With the technology requirement of II class sand in sand.
Additive is a kind of material that mesh improvement result can be played to mortar performance.In the present embodiment, additive master
To include swelling agent, water-reducing agent, retarder, water and optional thickener, optional antifoaming agent.The dosage of water can be according to water ash
It is selected than the dosage with cementitious material, for example, in terms of the total amount of mortar, the content of water is 7~15%.
Wherein, swelling agent includes one or more combinations in sulphoaluminate expander, bulking agent of calcium aluminate.With mortar
Total amount meter, the content of swelling agent is 0.1~3%.Swelling agent has excellent expansion effect, in conjunction with the expansion work of cementitious material
It can be along with the use of aggregate be to a certain extent compared with original technology, it is suppressed that the volume contraction of mortar is that its volume is steady
It is qualitative to be maintained.
Wherein, water-reducing agent includes polycarboxylic acid salt, sulfamic acid salt, melamine resin class, naphthalene sulfonic acids based water reducer, trimerization
One or more mixing of sodium phosphate and calgon.In terms of the total amount of mortar, the content of water-reducing agent is 0.1~2%.
The use of water-reducing agent can make the water consumption of mortar be lowered the effect for playing and reducing the ratio of mud, and water-reducing rate can in some instances
Reach 20~35%.Preferably, water-reducing agent is composite water-reducing agent, and is pressed by polycarboxylic acids, three innings of sodium phosphates and calgon
According to 1:1:1 mass ratio mixes.
Wherein, antifoaming agent includes the mixing of one or more of organic silicon, polyethers and mineral oil defoaming agent.
In terms of the total amount of mortar, the content of antifoaming agent is 0~2%.The use of antifoaming agent can be eliminated to a certain extent is drawn by bubble
The slurry stomata risen, to improve the intensity of slurry.
Wherein, retarder includes one in borax, sodium gluconate, citric acid, tartaric acid, boric acid and sodium tripolyphosphate
Kind or several mixing.In terms of the total amount of mortar, the content of retarder is 1~4%.Preferably, retarder is compound retarder,
And by borax, tartaric acid and boric acid according to 1:2:1 mass ratio mixes.
The production method of mortar is as follows：Made raw material stirring, mixing.
Mortar production process：
1) raw material met the requirements of the standard has been weighed by recipe requirements spare；
2) raw material prepared is mixed by fine aggregate, water (85-90wt% of total water consumption), then stirs 5 minutes, is stirring
Blender does not stop that additive, powder is added during mixing, and continues stirring 5 minutes after the completion of charging, adds remaining water, made
Slurry.
3) slurry being stirred extracts sample, carries out workability inspection, qualification use, unqualified improvement or discarded.Simultaneously
Physical detection sample is made, to as quality monitoring sample.
Sand in the prior art is usually starched and is difficult to achieve the effect that lower shrinkage or microdilatancy, in order to meet construction requirement, needs
Increase the raising of fluidity, and the raising of fluidity, it is often associated with the reduction of the increasing mortar strength of cubical contraction.
And the mortar in the embodiment of the present invention have have good workability, fluidity is big, can be while realizing self-flowing dense
It does not isolate, the not high feature of bleeding, lower shrinkage, intensity.Simultaneously because industrial solid castoff can be utilized, thus cycle is passed through
Positive contribution is played by the development of Ji and society.
In some specific examples, with reference to Test method for fluidity of cement mortar, the non-vibrating initial glue sand flow of mortar
Dynamic degree is more than 280mm；Geneva cone flows down the time less than 1min.Such performance is far above the mortar fluidity of ordinary mortar
150mm~200mm.
With reference to building mortar basic performance tests method, pressure resistance of the mortar provided in this embodiment through standard curing 28d
Degree is far above the 5~25MPa and improved 30~50MPa in the prior art of general mortar more than 60MPa.
The shrinkage value of mortar provided in this embodiment is very low.It is tested with reference to normal concrete long-term behaviour and endurance quality
The rate of self-contraction difference≤3.0 × 10 of method, 28d and 56d-4With 4.0 × 10-4；The drying shrinkage difference of 28d and 56d≤
3.50×10-4(such as 2.50 × 10-4) and 4.50 × 10-4(such as 3.0 × 10-4), far below general mortar 28d shrinkage values
10×10-4~25 × 10-4。
Mortar provided in an embodiment of the present invention also has endurance quality, with reference to normal concrete long-term behaviour and endurance quality
Test method, the sample of the mortar standard curing 28d in the embodiment of the present invention move after capable of resisting 300 fast freeze-thaws cycles
Elasticity modulus loss is less than 10%, and carbonization 28d depth is 0, and gas permeability coefficient is less than 5.0 × 10-8m2/ s, 160 sulfuric-resistings
Salt tests corrosion resistance index and is more than 85% etc..The resisting chloride ion penetration transport coefficient of standard curing 56d is less than 4.5 × 10-12m2/s。
For generally, mortar provided in an embodiment of the present invention is made that improvement in following several respects.
Used in terms of improving fluidity diminishing technology (especially composite water-reducing agent) and micropowder technology (such as flyash,
The use of silicon ash)；
(high-strength) fine aggregate, water-reducing agent, antifoaming agent, micropowder technology have been used in terms of improving intensity；
Swelling agent, composite water-reducing agent, micropowder technology, fine aggregate have been used in terms of reducing shrinking percentage；
In terms of anti-isolation, bleeding, uses thickener to stable slurry mobile performance, played a positive role.Increase
Thick dose of use can prevent slurry from isolating, that is, prevent slurry from lower layer occur and coarse granule occur, upper layer is fine powder and water entirely.
Based on mortar provided above, a kind of method maintained public highway also proposed in the present invention.Maintenance process can be with
As under type is realized.Highway maintenance method in the crack of mortar injection to highway and will be cured by way of the mud jacking cementation of fissures.By
Cementitious material in mortar is mainly cement, and correspondingly, solidification is also to be carried out under the conditions of naturally, i.e., main to occur
Aquation.
A kind of mortar and highway maintenance method of the present invention are described in further detail with reference to embodiments.
Embodiment 1
The mortar that the ratio of mud is 0.275, fluidity is 295mm, raw material composition are as follows.
Material of main part：Cementitious material 36% (portland cement 26%, low-alkalinity sulphoaluminate cement 1%, flyash 6%,
Silicon ash 3%), aggregate 64% (river sand).
In terms of material of main part total amount, additive：Bulking agent of calcium aluminate 0.3%, 0.2% (polycarboxylic acids of composite water-reducing agent：Trimerization
Sodium phosphate：Calgon=1：1:1), methylcellulose thickener 0.2%, polyethers class A foam A antifoaming agent 0.2%, retarder
1.2% (borax：Tartaric acid：Boric acid=1：2：1), water 9.9%.
Mortar production method：By the stirring of each raw material, mixing.The initial flow of the mortar fluidity (not vibrating) of fresh mortar
Degree is 295mm.The geneva cone of 290mm flows down the time as 55s, while not isolating not bleeding.The 28d compression strength of hardened mortar
70.0MPa, 90d compression strength 86.0MPa.28d the and 56d drying shrinkages of hardened mortar are respectively 3.50 × 10-4With 4.50
×10-4, 28d and 56d rate of self-contraction is respectively 2.50 × 10-4With 3.0 × 10-4。
28d the and 56d resisting chloride ion penetration transport coefficients for measuring hardened mortar are respectively 5.9 × 10-12m2/ s and 4.0 × 10-12m2/ s, 28d gas permeability coefficient are 4.8 × 10-8m2/ s, 300 Frozen-thawed cycled Dynamic Elastic Module losses are 1.0%, mass loss
It is 1.5%, carbonization 28d carbonation depths are that 0,160 sulfate resistance experiment corrosion resistance index are 91.5%.
Embodiment 2
The mortar that the ratio of mud is 0.275, fluidity is 285mm, raw material composition are as follows.
Material of main part：Cementitious material 40% (portland cement 30%, low-alkalinity sulphoaluminate cement 1%, flyash 6%,
Silicon ash 3%), aggregate 60% (river sand 29%, building give up fine aggregate 31%).
In terms of material of main part total amount, additive：Bulking agent of calcium aluminate 0.5%, 0.3% (polycarboxylic acids of composite water-reducing agent：Trimerization
Sodium phosphate：Calgon=1：1:1), methylcellulose thickener 0.2%, polyethers class A foam A antifoaming agent 0.3%, retarder
1.2% (borax：Tartaric acid：Boric acid=1：2：1), water 11%.
Mortar production method：By the stirring of each raw material, mixing.The initial flow of the mortar fluidity (not vibrating) of fresh mortar
Degree is 285mm.The geneva cone of 290mm flows down the time as 59s, while not isolating not bleeding.The 28d compression strength of hardened mortar
68.0MPa, 90d compression strength 81.0MPa.28d the and 56d drying shrinkages of hardened mortar are respectively 3.80 × 10-4With 4.70
×10-4, 28d and 56d rate of self-contraction is respectively 2.70 × 10-4With 3.3 × 10-4。
28d the and 56d resisting chloride ion penetration transport coefficients for measuring hardened mortar are respectively 5.9 × 10-12m2/ s and 4.0 × 10-12m2/ s, 28d gas permeability coefficient are 4.8 × 10-8m2/ s, 300 Frozen-thawed cycled Dynamic Elastic Module losses are 1.0%, mass loss
It is 1.5%, carbonization 28d carbonation depths are that 0,160 sulfate resistance experiment corrosion resistance index are 91.5%.
Embodiment 3
The mortar that the ratio of mud is 0.28, fluidity is 285mm, raw material composition are as follows.
Material of main part：Cementitious material 43% (portland cement 33%, low-alkalinity sulphoaluminate cement 1%, flyash 6%,
Silicon ash 3%), aggregate 57% (building solid give up fine aggregate).
In terms of material of main part total amount, additive：Bulking agent of calcium aluminate 0.65%, 0.4% (polycarboxylic acids of composite water-reducing agent：Three
Polyphosphate sodium：Calgon=1：1:1), methylcellulose thickener 0.2%, polyethers class A foam A antifoaming agent 0.3%, slow setting
1.2% (borax of agent：Tartaric acid：Boric acid=1：2：1), water 12%.
Mortar production method：By the stirring of each raw material, mixing.The initial flow of the mortar fluidity (not vibrating) of fresh mortar
Degree is 285mm.The geneva cone of 290mm flows down the time as 59s, while not isolating not bleeding.The 28d compression strength of hardened mortar
58.0MPa, 90d compression strength 72.0MPa.28d the and 56d drying shrinkages of hardened mortar are respectively 3.90 × 10-4With 4.90
×10-4, 28d and 56d rate of self-contraction is respectively 2.80 × 10-4With 3.5 × 10-4。
28d the and 56d resisting chloride ion penetration transport coefficients for measuring hardened mortar are respectively 5.9 × 10-12m2/ s and 4.0 × 10-12m2/ s, 28d gas permeability coefficient are 4.8 × 10-8m2/ s, 300 Frozen-thawed cycled Dynamic Elastic Module losses are 1.0%, mass loss
It is 1.5%, carbonization 28d carbonation depths are that 0,160 sulfate resistance experiment corrosion resistance index are 91.5%.
Comparative example 1
The mortar that the ratio of mud is 0.49, fluidity is 245mm, raw material composition are as follows.
Material of main part：Cementitious material 43% (portland cement 33%, low-alkalinity sulphoaluminate cement 1%, flyash 6%,
Silicon ash 3%), aggregate 57% (building solid give up fine aggregate).
Water and material of main part weight ratio 21:100.
Mortar production method：By the stirring of each raw material, mixing.The initial flow of the mortar fluidity (not vibrating) of fresh mortar
Degree is 245mm.The geneva cone of 290mm time that flows down is 69s, while not being isolated, not bleeding.The 28d compression strength of hardened mortar
38.0MPa, 90d compression strength 42.0MPa.28d the and 56d drying shrinkages of hardened mortar are respectively 8.70 × 10-4With 8.90
×10-4, 28d and 56d rate of self-contraction is respectively 6.80 × 10-4With 7.5 × 10-4。
28d the and 56d resisting chloride ion penetration transport coefficients for measuring hardened mortar are respectively 5.9 × 10-12m2/ s and 4.0 × 10-12m2/ s, 28d gas permeability coefficient are 4.8 × 10-8m2/ s, 300 Frozen-thawed cycled Dynamic Elastic Module losses are 2.0%, mass loss
It is 2.5%, carbonization 28d carbonation depths are that 0,160 sulfate resistance experiment corrosion resistance index are 91.5%.
Comparative example 2
The mortar that the ratio of mud is 0.28, fluidity is 295mm, raw material composition are as follows.
Material of main part：Cementitious material 43% (portland cement 33%, low-alkalinity sulphoaluminate cement 1%, flyash 6%,
Silicon ash 3%), aggregate 57% (building solid give up fine aggregate).
In terms of material of main part total amount, additive：Bulking agent of calcium aluminate 0.65%, 0.4% (polycarboxylic acids of composite water-reducing agent：Three
Polyphosphate sodium：Calgon=1：1:1), polyethers class A foam A antifoaming agent 0.3%, 1.2% (borax of retarder：Tartaric acid：Boron
Acid=1：2：1), water 12%.I.e. the dosage of water and the weight ratio of material of main part are 12:100, and so on.
Mortar production method：By the stirring of each raw material, mixing.The initial flow of the mortar fluidity (not vibrating) of fresh mortar
Degree is 295mm.The geneva cone of 290mm time that flows down is 55s, while not being isolated, not bleeding.The 28d compression strength of hardened mortar
55.0MPa, 90d compression strength 68.0MPa.28d the and 56d drying shrinkages of hardened mortar are respectively 4.80 × 10-4With 5.30
×10-4, 28d and 56d rate of self-contraction is respectively 2.90 × 10-4With 3.8 × 10-4。
28d the and 56d resisting chloride ion penetration transport coefficients for measuring hardened mortar are respectively 5.9 × 10-12m2/ s and 4.0 × 10-12m2/ s, 28d gas permeability coefficient are 4.8 × 10-8m2/ s, 300 Frozen-thawed cycled Dynamic Elastic Module losses are 1.0%, mass loss
It is 1.5%, carbonization 28d carbonation depths are that 0,160 sulfate resistance experiment corrosion resistance index are 91.5%.
Comparative example 3
The mortar that the ratio of mud is 0.28, fluidity is 285mm, raw material composition are as follows.
Material of main part：Cementitious material 43% (portland cement 33%, low-alkalinity sulphoaluminate cement 1%, flyash 6%,
Silicon ash 3%), aggregate 57% (building solid give up fine aggregate).
In terms of material of main part total amount, additive：Bulking agent of calcium aluminate 0.65%, 0.4% (polycarboxylic acids of composite water-reducing agent：Three
Polyphosphate sodium：Calgon=1：1:1), methylcellulose 0.2%, 1.2% (borax of retarder：Tartaric acid：Boric acid=1：
2：1), water 12%.
Mortar production method：By the stirring of each raw material, mixing.The initial flow of the mortar fluidity (not vibrating) of fresh mortar
Degree is 285mm.The geneva cone of 290mm time that flows down is 59s, while not being isolated, not bleeding.The 28d compression strength of hardened mortar
54.0MPa, 90d compression strength 68.0MPa.28d the and 56d drying shrinkages of hardened mortar are respectively 4.10 × 10-4With 5.50
×10-4, 28d and 56d rate of self-contraction is respectively 3.20 × 10-4With 3.7 × 10-4。
28d the and 56d resisting chloride ion penetration transport coefficients for measuring hardened mortar are respectively 5.9 × 10-12m2/ s and 4.0 × 10-12m2/ s, 28d gas permeability coefficient are 4.8 × 10-8m2/ s, 300 Frozen-thawed cycled Dynamic Elastic Module losses are 1.0%, mass loss
It is 1.5%, carbonization 28d carbonation depths are that 0,160 sulfate resistance experiment corrosion resistance index are 91.5%.
Comparative example 4
The ratio of mud is the mortar of 0.42, fluidity 260mm, and raw material composition is as follows.
Material of main part：Cementitious material 92% (portland cement 82%, low-alkalinity sulphoaluminate cement 5%, flyash 5%,
Aggregate 8% (river sand).
In terms of material of main part total amount, additive：Bulking agent of calcium aluminate 8%, 0.5% (polycarboxylic acids of composite water-reducing agent：Trimerization phosphorus
Sour sodium：Calgon=1：1:1), methylcellulose 0.08%, polyethers class A foam A antifoaming agent 0.2%, water 39%.
Mortar production method：By the stirring of each raw material, mixing.The initial flow of the mortar fluidity (not vibrating) of fresh mortar
Degree is 260mm.The geneva cone of 290mm time that flows down is 60s, while not being isolated, not bleeding.The 28d compression strength of hardened mortar
40.0MPa, 90d compression strength 43.0MPa.28d the and 56d drying shrinkages of hardened mortar are respectively 5.50 × 10-4With 6.00
×10-4, 28d and 56d rate of self-contraction is respectively 3.20 × 10-4With 3.7 × 10-4。
28d the and 56d resisting chloride ion penetration transport coefficients for measuring hardened mortar are respectively 5.9 × 10-12m2/ s and 4.0 × 10-12m2/ s, 28d gas permeability coefficient are 4.8 × 10-8m2/ s, 300 Frozen-thawed cycled Dynamic Elastic Module losses are 1.0%, mass loss
It is 1.5%, carbonization 28d carbonation depths are that 0,160 sulfate resistance experiment corrosion resistance index are 91.5%.
Although illustrate and describing the present invention with specific embodiment, it will be appreciated that without departing substantially from the present invention's
Many other change and modification can be made in the case of spirit and scope.It is, therefore, intended that in the following claims
Including belonging to all such changes and modifications in the scope of the invention.
Claims (10)
1. a kind of high-strength micro- the contractions highway crack mud jacking mortar of gravity flow, which is characterized in that the ratio of mud of the mortar for 0.25~
0.35, fluidity is more than 280mm, and the mortar is mainly made of additive and material of main part, the material of main part include according to
The following components of mass percent meter：The dosage of cementitious material 30~60%, aggregate 40~70%, the additive is the master
The 5~27% of body quality of materials；
Wherein, the cementitious material is mainly made of portland cement, sulphate aluminium cement, flyash and silicon ash；The bone
Material includes one or more in river sand, CHARACTERISTICS OF TAILINGS SAND and building solid castoff, and granularity is 0.3~0.5mm；It is described additional
Agent includes swelling agent, water-reducing agent, retarder, water and optional thickener, optional antifoaming agent.
2. the high-strength micro- contraction highway crack mud jacking mortar of gravity flow according to claim 1, which is characterized in that the main body material
Material includes the following components according to mass percent meter：Cementitious material 40~50%, aggregate 50~60%.
3. the high-strength micro- contraction highway crack mud jacking mortar of gravity flow according to claim 1, which is characterized in that the swelling agent
Including one or more combinations in sulphoaluminate expander, bulking agent of calcium aluminate, the dosage of the swelling agent is the master
The 0.1~3% of body quality of materials.
4. the high-strength micro- contraction highway crack mud jacking mortar of gravity flow according to claim 1, which is characterized in that the water-reducing agent
Including polycarboxylic acid salt, sulfamic acid salt, melamine resin class, naphthalene sulfonic acids based water reducer, sodium tripolyphosphate and hexa metaphosphoric acid
One or more mixing of sodium, the dosage of the water-reducing agent are the 0.1~2% of the material of main part quality.
5. the high-strength micro- contraction highway crack mud jacking mortar of gravity flow according to claim 1, which is characterized in that the antifoaming agent
Include the mixing of one or more of organic silicon, polyethers and mineral oil defoaming agent, the dosage of the antifoaming agent is
The 0~2% of the material of main part quality.
6. the high-strength micro- contraction highway crack mud jacking mortar of gravity flow according to claim 1, which is characterized in that the retarder
Include the mixing of one or more of borax, sodium gluconate, citric acid, tartaric acid, boric acid and sodium tripolyphosphate, it is described
The dosage of retarder is the 1~4% of the material of main part quality.
7. the high-strength micro- contraction highway crack mud jacking mortar of gravity flow according to claim 1, which is characterized in that the dosage of water is
The content of the material of main part quality is 7~15%.
8. the high-strength micro- contraction highway crack mud jacking mortar of gravity flow according to claim 1, which is characterized in that the silicate
The label of cement is 42.5 or more.
9. the high-strength micro- contraction highway crack mud jacking mortar of gravity flow according to claim 1, which is characterized in that the water-reducing agent
For composite water-reducing agent, and by polycarboxylic acids, three innings of sodium phosphates and calgon according to 1:1:1 mass ratio mixes；It is slow
Solidifying agent is compound retarder, and by borax, tartaric acid and boric acid according to 1:2:1 mass ratio mixes.
10. highway maintenance method, which is characterized in that will be such as any one of claim 1~9 institute by way of the mud jacking cementation of fissures
In the mortar injection stated to the crack of highway and cure.
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| CN109180063A (en) * | 2018-11-13 | 2019-01-11 | 中铁二局集团有限公司 | A kind of cement mortar additive and its application method |
| CN111704404A (en) * | 2020-05-20 | 2020-09-25 | 深圳市东大洋建材有限公司 | Shrinkage-compensating concrete and preparation method thereof |
| CN112592097A (en) * | 2021-01-26 | 2021-04-02 | 江西省建筑材料工业科学研究设计院 | Copper tailing powder post-tensioned pre-stressed pipeline grouting agent |
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| CN107522449A (en) * | 2017-08-30 | 2017-12-29 | 东南大学 | A kind of Self-leveling low-shrinkage and high-strength mortar |
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| CN107522449A (en) * | 2017-08-30 | 2017-12-29 | 东南大学 | A kind of Self-leveling low-shrinkage and high-strength mortar |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109180063A (en) * | 2018-11-13 | 2019-01-11 | 中铁二局集团有限公司 | A kind of cement mortar additive and its application method |
| CN111704404A (en) * | 2020-05-20 | 2020-09-25 | 深圳市东大洋建材有限公司 | Shrinkage-compensating concrete and preparation method thereof |
| CN112592097A (en) * | 2021-01-26 | 2021-04-02 | 江西省建筑材料工业科学研究设计院 | Copper tailing powder post-tensioned pre-stressed pipeline grouting agent |
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