CN110304865A - Old cement concrete overlays repair materials and application method - Google Patents
Old cement concrete overlays repair materials and application method Download PDFInfo
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- CN110304865A CN110304865A CN201910216322.2A CN201910216322A CN110304865A CN 110304865 A CN110304865 A CN 110304865A CN 201910216322 A CN201910216322 A CN 201910216322A CN 110304865 A CN110304865 A CN 110304865A
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- miberal powder
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Classifications
-
- 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
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
-
- 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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
-
- 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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/72—Repairing or restoring existing buildings or building materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The present invention provides a kind of Old cement concretes to overlay repair materials and application method, material component including following parts by weight: 5~6 parts of emulsified asphalt, 0.4~0.5 part of direct putting type modifying agent, 0.02~0.03 part of antistripping agent, 0.2~0.4 part of fiber stabilizer, 90~95 parts of mineral aggregate；The mineral aggregate includes the component of following parts by weight: 40~45 parts of the rubble of the first partial size, 30~40 parts of the rubble of the second partial size, and 10~15 parts of aggregate chips, 8~10 parts of miberal powder.The miberal powder includes 20% calcium hydroxide.The gradation of the mineral aggregate uses SMA-13 match ratio, i.e., described first partial size is 9.5~13.2mm, and second partial size is 4.75~9.5mm, and the partial size of the aggregate chips is 0~4.75mm, and the partial size of the miberal powder is 0~0.6mm.A pot mixing modified asphalt mixture is mixed and stirred in the use of the present invention, only needing directly to launch direct putting type modifying agent into asphalt, this modification mode has thoroughly broken the tradition of modified pitch, enables modification technology is convenient to implement.
Description
Technical field
The present invention relates to road modified asphalt technologies, and in particular, to a kind of Old cement concrete overlay reparation material
Material and application method.
Background technique
Now, Road Transportation industry development is more and more flourishing, and the cement pavement of script making has been unable to meet existing rank
Section uses, therefore a series of breakage occurs in road surface, in order to make to travel use that is more smooth, reducing traffic accident, increase road
Service life is transformed for " white+black " road surface, environmentally-friendly asphalt concrete pavement technology is introduced, to blackened structure process
High-intensitive Plastic direct putting type modifying agent is applied in hot asphalt mixture.
By direct putting type modified technique, certain shapes and size is made by special technology in various polymer materials
Solid particle (powder) modifying agent, and be packaged into bag and transport asphalt mixture mixing base, in asphalt mixture mixing, according to
According to the dosage of design, directly this polymer modification particle investment is mixed and stirred in cylinder by artificial or equipment, passes through conventional drip
Green mixture blending craft, mix production meet the asphalt being modified for standardizing modified standard, this solid polymer
Modifying agent is referred to as asphalt mixed material modifier.
Modified save of bituminous concrete is directly carried out to prepare the " three high " problem of modified pitch and deposit such as process high temperature
It puts and uses temperature also very high；Processing needs high energy consumption, i.e. the consumption such as electric power, diesel oil, conduction oil is more；Process height row
It puts, i.e., it is toxic flavoursome in discharge pitch in process, it is seriously polluted, also discharge very high C02.Production process does not have completely
There is modified pitch stabilization aid pollution problem, a large amount of energy has been saved in the aging reduced in Modified Bitumen Manufacturing, clearly
Clean environmental protection is convenient without the heating of dedicated band, heat preservation bitumen transportation and the simple and convenient storage of Storage Tank Construction using recycling materials recycling
It can store for a long time.
Summary of the invention
For the defects in the prior art, it is overlayed the object of the present invention is to provide a kind of Old cement concrete and repairs material
Material and application method.The present invention uses the modification technology of direct putting type, and the discharge that can accomplish energy-saving and environmental protection, reduce C02 is repaired
Road surface afterwards has superior strength character, high temperature anti-rut behavior, water stabilizing.
The Old cement concrete provided according to the present invention overlays repair materials, the raw material group including following parts by weight
Part: 5~6 parts of emulsified asphalt, 0.4~0.5 part of direct putting type modifying agent, 0.02~0.03 part of antistripping agent, fiber stabilizer 0.2~
0.4 part, 90~95 parts of mineral aggregate；
The mineral aggregate includes the component of following parts by weight: 40~45 parts of the rubble of the first partial size, the rubble 30 of the second partial size
~40 parts, 10~15 parts of aggregate chips, 8~10 parts of miberal powder.
Preferably, the miberal powder includes 20% calcium hydroxide.
Preferably, the gradation of the mineral aggregate uses SMA-13 match ratio, i.e., described first partial size is 9.5~13.2mm, institute
Stating the second partial size is 4.75~9.5mm, and the partial size of the aggregate chips is 0~4.75mm, and the partial size of the miberal powder is 0~0.6mm.
Preferably, the partial size of the direct putting type modifying agent is 4~6mm.
Preferably, the rubble and the aggregate chips are to gather materials；The miberal powder is filler.
Old cement concrete provided by the invention overlays the application method of repair materials, includes the following steps:
Step S1: gathering materials in the mineral aggregate is dried with the temperature not less than 185 DEG C；
Step S2: regrading and metering are carried out by gathering materials described in after drying, and is sent into agitator, while adding from miberal powder
The direct putting type modifying agent and fiber stabilizer for adding hole investment corresponding measurement, carry out dry mixing, dry mixing preheating setting time；
Step S3: the miberal powder and dry mixing are added；
Step S4: by temperature control after 150 DEG C~160 DEG C, the emulsified asphalt added with the antistripping agent is sprayed into；
Step S5: 40~50s of wet-mixing；
Step S6: discharging, and drop temperature is controlled between 165 DEG C~185 DEG C.
Preferably, which is characterized in that the preheating setting time is 5s.
Compared with prior art, the present invention have it is following the utility model has the advantages that
1, the present invention breaks many and diverse modification processing process of traditional modified pitch, need to only process in factory straight
Throwing formula modifying agent, the then packed pitch batching plant for transporting user directly open bag in application and take out quantity required, then according to
It is direct plungeed into asphalt storage according to field condition and is pumped into the modified pitch mixing of pitch batching plant mixing after simple agitation is uniform
Material, or the direct putting type modifying agent of demand is directly launched into asphalt and mixes and stirs a pot mixing modified asphalt mixture, this
Kind modification mode has thoroughly broken the tradition of modified pitch, enables modification technology is convenient to implement.
2, direct putting type modifying agent is to direct plunge into the mixture of pitch batching plant to mix and stir in pot in the present invention, avoids pitch
The mass loss of the modifying agent and two kinds of raw material of pitch of modifying process stablizes and declines without the quality of modified storage process
The problem of subtracting, while also there is no mixture high temperature to mix and stir the mass attenuation hidden danger of process modified pitch, can guarantee road surface with
The modified high quality of mixture.
3, the present invention be according to difference such as the vast regional climates in China, according to the diversity of asphalt pavement structure form, and
The series of products of exploitation, user can be according to self-condition unrestricted choices, so having very strong flexibility, applicability；Due to
Direct putting type modifying agent is modified, produces high performance asphalt, reduces asphalt modification processing charges, so integral into
This is better than traditional modified pitch.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection scope.
Embodiment one:
In the present embodiment, Old cement concrete provided by the invention overlays repair materials, including following parts by weight
Material component: 5.89 parts of emulsified asphalt, 0.41 part of direct putting type modifying agent, 0.025 part of antistripping agent, 0.3 part of fiber stabilizer, mine
93.675 parts of material, the mineral aggregate include gathering materials and filler, specifically include the component of following parts by weight: the rubble 43 of the first partial size
Part, 35 parts of the rubble of the second partial size, 13 parts of aggregate chips, 9 parts of miberal powder, wherein include 20% calcium hydroxide in miberal powder.Wherein, the rubble
It is to gather materials with the aggregate chips, the miberal powder is filler.
The gradation of the mineral aggregate uses the match ratio of SMA~13, i.e. the ballast grain sizes of the first partial size are 9.5~13.2mm, the
The ballast grain sizes of two partial sizes are 4.75~9.5mm, and aggregate chips partial size is 0~4.75mm, and miberal powder partial size is 0~0.6mm.
The emulsified asphalt uses high-viscous emulsified asphalt, particular technique index are as follows: surplus on sieve: 0, the sieve is
1.18mm sieve；Particle charging is cationic (+)；De-emulsification speed is split slowly；En Gela viscosity E25:21；Design asphalt viscosity C25,3:
33s；Evaporated residue content: 63.3%, evaporated residue needle penetration (100g, 25 DEG C, 5s) (0.1mm): 75, evaporated residue
Softening point: 74.0 DEG C, evaporated residue ductility (5 DEG C): 25.1cm, evaporated residue solubility (trichloro ethylene): 99.3%；1
Its storage stability: 0%；5 days storage stabilities: 1%.
The concrete property of the direct putting type modifying agent are as follows: appearance is gray solid little particle, 0.91~0.96kg/ of density
m3, granular size be 4~6mm, 120 DEG C~160 DEG C of fusing point.
The particular technique index of the antistripping agent are as follows: active matter content 99.5%；Density 0.95；PH7~8；Thermostabilization
300 DEG C of property；5 grades of adhesiveness.
The fiber stabilizer is wood fibre, is had not for acid, caustic corrosion；It is nontoxic, tasteless, pollution-free, without radiation
Property；There are good toughness, dispersibility and a chemical stability, the characteristics such as oil suction, water absorbing capacity are strong.
The density index of the rubble are as follows: apparent density 2.724g/cm3, apparent relative density 2.732, bulk volume is opposite
Density 2.708, water absorption rate 0.53%.
The density index of the aggregate chips are as follows: apparent density 2.629g/cm3, apparent relative density 2.636, bulk volume is opposite
Density 2.569, water absorption rate 0.97%.
The miberal powder apparent density 2.715g/cm3, apparent relative density 2.720.
The Old cement concrete being prepared in the present invention overlays the technical indicator of repair materials are as follows: bulk volume phase
To density 2.344, theoretical maximum relative density 2.439, voidage 3.9%, void in mineral aggregate 17.1%, saturation degree are calculated
77.8%, stability 10.68kN, flow valuve 3.92mm, residual stability 86.1%, 5171 times/mm of dynamic stability, freeze-thaw split are residual
Stay intensity than 85.9%, low-temperature bending failure strain 2733 μ ε, infiltration coefficient 29ml/min, asphalt leakage analysis losing is
0.05%, asphalt disperses loss for 8.5%.
It is A1=500* for area when overlaying repair materials using Old cement concrete provided by the invention
5.3=2650m2Engineering, by 2.45 tons/m3Mixture specific gravity, 260 tons of raw materials of mixture dosage, then high-viscous emulsified asphalt dosage
=260*5.89%=15.314 tons, direct putting type amount of modifier=260*0.4%=1.04 tons, antistripping agent=260*
0.0252%=0.06552 tons, fiber stabilizer=260*0.3%=0.78 tons, gather materials and filler=260*92.9653%=
241.71 ton.
In construction, construction technology includes the following steps:
Step 1: sub-layer prepares, specifically: before Construction of Asphalt Pavement, first sub-layer is cleaned, is removed all kinds of
Sundries and the material that is scattered, in face of closed operation after road, reduce construction bring pollution, and spread adhesion coating in time, be on pitch
Surface construction is ready.
Step 2: mixture mixes and stirs, specifically: it is mixed and stirred using intermittent asphalt mixture mixer, in strict accordance with matching
Composition and division in a proportion feeding.It is appropriate to reduce gather materials quantity and the raising flame temperature for entering Drying when mixing and stirring the first disk asphalt,
Guarantee to gather materials in booting and be higher than 0 to 5 DEG C of specified value with the heating temperature of pitch, avoid the first disk because temperature is inadequate, mixture
Drop temperature is controlled substantially at 160 DEG C.It is added before modifying agent, it is dry to entering to dry of gathering materials, it is desirable that the aggregate temperature of drying is not less than
185℃；Gather materials after drying and carry out regrading and metering, and be sent into agitator, while putting into corresponding measurement from miberal powder added holes
Direct putting type modifying agent and fiber stabilizer, carry out dry mixing, dry mixing time 5s, i.e. the blanking time 5s that gathers materials of mixing building；Addition
Miberal powder；The emulsified asphalt added with the antistripping agent is sprayed into after dry mixing, and by temperature control between 150 DEG C~160 DEG C；Wet-mixing
40~50s；The drop temperature of modifying agent asphalt: 165 DEG C~185 DEG C.The batching plant is equipped with computer equipment, can
Store and search every disk a variety of materials dosage, every disk mixes and stirs total amount, mixes and stirs temperature.
Step 3: mixture transport, specifically: haulage vehicle should be cleaned out before charging, to prevent from bonding, in railway carriage
It is interior to brush a small amount of diesel oil as interleaving agent.To prevent mixture segregation when charging, should charge by the sequence in front and back.Factory before by
The temperature of mixture is surveyed in car test, and with canvas covering and heat insulating, dust-proof.In addition, also to reinforce construction site Organization And Management, pay attention to
Each link continuity, to prevent asphalt mixture warm degree from excessively reducing before compacting；Pay attention to the heat preservation of transport vehicle.
Step 4: mixture paves, specifically: mixture laying carries out thickness and smooth using Sonic Averaging System
The control of degree.The vibration frequency control of paver hammer ram is greater than 30%, to improve the initial pressure on road surface as far as possible in paving process
Solidity.Paver slowly, uniformly, continuously uninterruptedly paves when paving, and to improve flatness, reduces mixture segregation, test section
Spreading speed control is 3m/min.Dumper stops at 10~30cm before paver when paving, and is pushed to advance by paver and be opened
Begin slow discharging, in order to avoid dumper hits paver, influences the flatness to pave.
To prevent mixture segregation, spiral uniform and stable feeding when holding feeding in paving process, and control mixture
Height is no less than 2/3 height of feeding screw, to guarantee the uniformity in face of paving.The mixture thickness to have paved is thick according to pine paving
Degree is measured at any time using insertion.Coefficient of loose laying is 1.25.
Step 5: compacting and molding, specifically: 1 30t rubber-tyred roller of configuration, 1 13t dual-steel wheel road roller machine combination
Mixture is carried out to roll.Mixture is rolled immediately following the progress that paves, to guarantee the grinding compacting in higher temperatures, but it is serious not generate
Premised on passage and crack.Road roller rolls will be with slowly uniform speed progress, and rolling route and direction must not arbitrarily change
Become.Turn back position need to before paver so that advance, must not turn back on same cross section, so as not to cause mixture elapse or gather around
Packet, influences surface evenness.Road roller is forbidden to turn in the section of non-roller-compaction, turn around plus water or stop.Roller compaction process is pressed
First pressing, multiple pressure and final pressure three phases.Ensure to complete first pressing not less than 165 DEG C, not less than 140 DEG C under the conditions of complete
Multiple pressure first completes final pressure not less than 110 DEG C of conditions.
When first pressing, using 13t dual-steel wheel road roller static pressure 1 time, speed is 2~3Km/h, adjacent to roll 1/3 stone roller of band overlapping
Pinch roller width, is rolled from low to high when rolling.To prevent viscous wheel, steel roller is used to rolling wheel spray mode, but to be controlled
It water production and to nebulize, cool down to prevent mixture too fast.
Multiple pressure starts after first pressing, and using 13t dual-steel wheel road roller static pressure 3 times, speed is 2~3Km/h, adjacent stone roller
Pressure zone is overlapped 1/3 rolling wheel width, rolls from low to high when rolling, to keep rolling wheel to clean, wanted when having the viscous wheel of mixture and
When remove.To prevent viscous wheel, steel roller is used to rolling wheel spray mode, but to be controlled water and to be nebulized, to prevent
Mixture cooling is too fast.
Final pressure uses 13t dual-steel wheel road roller static pressure, and pass is subject to surface without wheelmark.When compacting, road roller can be tight
With paver, using closely follow, pressure, high frequency, compacting strategy by a narrow margin slowly.
Step 5: open to traffic can open to traffic after road surface road table temperature is cooled to lower than 50 DEG C.
After measured, above-mentioned resulting Old cement concrete overlays the infiltration coefficient 29mL/min of repair materials, has
Preferable permeability performance.High-temperature stability index is as shown in table 1, and low-temperature stability index is as shown in table 2, and water stability index is such as
Shown in table 3.
1 asphalt mixture in track test result of table
2 asphalt bend test result of table
3 asphalt indirect tensile test on frozen-thaw result of table
Comparative example one:
In the present embodiment, Old cement concrete provided by the invention overlays repair materials, including raw material and mineral aggregate；Institute
State the component that raw material includes following parts by weight: 6 parts of modified pitch of SBS (I~D), 0.024 part of antistripping agent, fiber stabilizer 0.3
Part, gather materials with 93.676 parts of filler, the component of the following parts by weight of mineral aggregate: 69.5 parts of rubble, 21 parts of aggregate chips, 9.5 parts of miberal powder.
It is A1=500*5.3=2650m for area2Process, by 2.45 tons/m3Mixture specific gravity, mixture dosage
260 tons of mixtures, then modified pitch dosage=260*6.0%=15.6 tons, antistripping agent=260*0.024%=0.0624
Ton, gathers materials and filler=260*93.676%=243.56 tons by fiber stabilizer=260*0.3%=0.78 tons.
It is consistent using work progress and technique and embodiment one.
After measured, the infiltration coefficient 19mL/min of above-mentioned resulting SSB modifying agent asphalt.High-temperature stability index
As shown in table 4, low-temperature stability index is as shown in table 5, and water stability index is as shown in table 6.
4 asphalt mixture in track test result of table
5 asphalt bend test result of table
6 asphalt indirect tensile test on frozen-thaw result of table
About high-temperature stability contrast table 1 and table 4, the track dynamic stability of two kinds of asphalts, which has reached heat, to be mixed and changes
Property asphalt requirement, illustrate that Old cement concrete in the present invention overlays repair materials and has good high temperature steady
It is qualitative.The stability that Old cement concrete in the present invention overlays repair materials is greater than SSB modifying agent asphalt.
About low-temperature stability contrast table 2 and table 5, it is general that the bending strain of two kinds of asphalts reaches Liao Dong severe cold area
The requirement of logical hot-mix asphalt mixture illustrates that the Old cement concrete in the present invention overlays repair materials with good low
The bending strain of warm crack resistance and the Old cement concrete overlay repair materials in the present invention is mixed greater than SBS modifier pitch
Close material.
About water stability contrast table 3 and table 6, the Ratio of split strength of two kinds of asphalts has reached ordinary hot and has mixed drip
The requirement of green mixture, illustrate Old cement concrete in the present invention overlay repair materials have good water stability and
The Ratio of split strength that Old cement concrete in the present invention overlays repair materials is less than SBS modifier asphalt.
Comprehensive Correlation above data, the Old cement concrete in the present invention, which overlays repair materials, has preferable application
Effect.
Embodiment two:
In the present embodiment, Old cement concrete provided by the invention overlays repair materials, including following parts by weight
Material component: 5 parts of emulsified asphalt, 0.4 part of direct putting type modifying agent, 0.02 part of antistripping agent, 0.2 part of fiber stabilizer, mineral aggregate 90
Part, the mineral aggregate includes gathering materials and filler, specifically includes the component of following parts by weight: 40 parts, second of the rubble of the first partial size
30 parts of the rubble of diameter, 10 parts of aggregate chips, 8 parts of miberal powder, wherein include 20% calcium hydroxide in miberal powder.
In the present embodiment the technical indicator of each component, the gradation of mineral aggregate and construction technology with phase in embodiment one
Together.
Embodiment three:
In the present embodiment, Old cement concrete provided by the invention overlays repair materials, including following parts by weight
Material component: 6 parts of emulsified asphalt, 0.5 part of direct putting type modifying agent, 0.03 part of antistripping agent, 0.4 part of fiber stabilizer, mineral aggregate 95
Part, the mineral aggregate includes gathering materials and filler, specifically includes the component of following parts by weight: 45 parts, second of the rubble of the first partial size
40 parts of the rubble of diameter, 15 parts of aggregate chips, 10 parts of miberal powder, wherein include 20% calcium hydroxide in miberal powder.
In the present embodiment the technical indicator of each component, the gradation of mineral aggregate and construction technology with phase in embodiment one
Together.
Above-mentioned three groups of embodiments, the asphalt by carrying out construction formation after the design to material component all have good
Good high-temperature stability, good low-temperature cracking-resistance and there is good water stability.
In the present embodiment, the existing coarse aggregate in forming that gathers materials can form skeleton structure, while again according to voidage
Size is added appropriate number of fine aggregate and makes it have higher compaction rate, to form a kind of " framework dense structure ", institute
To use SMA series gradation, by the performance of asphalt mixture comparative test, the mineral aggregate gradation for selecting SMA-13 and drip are determined
Green dosage etc..And under the comprehensive function of suitable construction technology, not only have using the road surface that the asphalt is modified
Good social benefit, but also there is preferable economic benefit.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring substantive content of the invention.
Claims (7)
1. a kind of Old cement concrete overlays repair materials, which is characterized in that the material component including following parts by weight: cream
5~6 parts of pitch of change, 0.4~0.5 part of direct putting type modifying agent, 0.02~0.03 part of antistripping agent, fiber stabilizer 0.2~0.4
Part, 90~95 parts of mineral aggregate；
The mineral aggregate includes the component of following parts by weight: 40~45 parts of the rubble of the first partial size, the rubble 30~40 of the second partial size
Part, 10~15 parts of aggregate chips, 8~10 parts of miberal powder.
2. Old cement concrete according to claim 1 overlays repair materials, which is characterized in that the miberal powder includes
20% calcium hydroxide.
3. Old cement concrete according to claim 1 overlays repair materials, which is characterized in that the grade of the mineral aggregate
With SMA-13 match ratio is used, i.e., described first partial size is 9.5~13.2mm, and second partial size is 4.75~9.5mm, described
The partial size of aggregate chips is 0~4.75mm, and the partial size of the miberal powder is 0~0.6mm.
4. Old cement concrete according to claim 1 overlays repair materials, which is characterized in that the direct putting type changes
Property agent partial size be 4~6mm.
5. Old cement concrete according to claim 1 overlays repair materials, which is characterized in that the rubble and institute
Stating aggregate chips is to gather materials；The miberal powder is filler.
6. a kind of Old cement concrete described in any one of claim 1 to 5 overlays the application method of repair materials, special
Sign is, includes the following steps:
Step S1: gathering materials in the mineral aggregate is dried with the temperature not less than 185 DEG C；
Step S2: carrying out regrading and metering for gathering materials described in after drying, and be sent into agitator, while from miberal powder added holes
The direct putting type modifying agent and fiber stabilizer of corresponding measurement are put into, dry mixing, dry mixing preheating setting time are carried out；
Step S3: the miberal powder and dry mixing are added；
Step S4: by temperature control after 150 DEG C~160 DEG C, the emulsified asphalt added with the antistripping agent is sprayed into；
Step S5: 40~50s of wet-mixing；
Step S6: discharging, and drop temperature is controlled between 165 DEG C~185 DEG C.
7. the application method that Old cement concrete according to claim 6 overlays repair materials, which is characterized in that institute
Stating preheating setting time is 5s.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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