CN107311612A - A kind of graded broken stone mixture - Google Patents
A kind of graded broken stone mixture Download PDFInfo
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- CN107311612A CN107311612A CN201710508511.8A CN201710508511A CN107311612A CN 107311612 A CN107311612 A CN 107311612A CN 201710508511 A CN201710508511 A CN 201710508511A CN 107311612 A CN107311612 A CN 107311612A
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- parts
- graded broken
- broken stone
- stone mixture
- titanium dioxide
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B30/00—Compositions for artificial stone, not containing binders
- C04B30/02—Compositions for artificial stone, not containing binders containing fibrous 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- 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
- E01C7/00—Coherent pavings made in situ
- E01C7/02—Coherent pavings made in situ made of road-metal without binders
- E01C7/04—Coherent pavings made in situ made of road-metal without binders of broken stones, gravel, or like 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
- 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
- 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)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The present invention relates to a kind of graded broken stone mixture, belong to ground surface material technical field.The invention mainly comprises aggregate raw material, modified acrylic fibre and expanded graphite；The preparation process of described aggregate raw material is：By titanium dioxide calcination and grind, the nano titanium dioxide powder activated, then by mixing such as graded broken stone particle, nano titanium dioxide powders of activation, obtain compound, compound is divided into 3 parts, and grinds to form three kinds of particles, aggregate raw material is obtained after mixing.Modifying polyacrylonitrile step is：Epoxy resin and absolute ethyl alcohol etc. are mixed, insulation reaction is carried out, obtains reaction solution, is that can obtain modified acrylic fibre by combination dryings such as polyacrylonitrile fibre and modification liquids.Coarse fodder formation skeleton in graded broken stone mixture prepared by the present invention, fines is filled in coarse fodder skeleton space, is conducive to improving integrally-built compactness and stability, and the intensity, resistance detrusion to improvement graded broken stone material play the role of obvious.
Description
Technical field
The present invention relates to a kind of graded broken stone mixture, belong to ground surface material technical field.
Background technology
The flexible material of graded broken stone etc loose type is set between asphalt surface course and semi-rigid type base, is a kind of effective
Delay asphalt pavement reflection ftracture method.Using high-quality graded broken stone as Semi-Rigid Pavement Structure transition zone, it can rise and disappear
Subtract the effect of stress, effectively prevent the appearance of semi-rigid pavement reflection crack disease, so as to delay or eliminate bituminous paving
Other diseases.The major advantage of graded broken stone has：1. absorb and cut down semi-rigid type base point stresses, reduce and delayed anti-
Penetrate the generation in crack；2. graded broken stone base can play a part of road surface drainage basic unit, to further improving high-grade highway road
Face uses quality, increases the service life particularly important；3. graded broken stone easily obtains high compactness, while higher stiffness is lower sleeping
Layer favourable crushed rock base course mechanical property thereon gives full play to.In a word, promoting graded broken stone flexible pavement technology can correct
The defect of original ground surface material, changes current semi-rigid base asphalt pavement structure form, transforms the structure on original road surface, enriches
The road structure mode of China, improves road bearing capacity and increases the service life, cost-effective, meets the strategy side of economic development
Pin and planning requirement.
But graded broken stone structure sheaf exist low intensity, permanent deformation is big, be open to traffic after be easily caused supercrust check crack and mistake
The problems such as big rut, and graded broken stone roller compaction process be easily loosely difficult it is integral, so as to limit graded broken stone in China
Application in highway.
It would therefore be highly desirable to which it is big to find a kind of intensity, it is unlikely to deform, it is easily integral, and surface layer check crack is not easily caused after being open to traffic
Graded broken stone mixture.
The content of the invention
The technical problems to be solved by the invention：For traditional graded broken stone mixture structure sheaf low intensity, mutability,
Loosely it is difficult integral, and there is provided a kind of graded broken stone mixture the problem of be easily caused supercrust check crack.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of graded broken stone mixture, it is characterised in that：Count by weight, including：70~80 parts of aggregate raw materials, 5~7 parts gather
Dralon and 10~20 parts of expanded graphites；
The preparation process of described aggregate raw material is：
（1）Weigh titanium dioxide and be put into after Muffle furnace, high-temperature calcination the nanometer two poured into grind into powder in mortar, activated
Titanium dioxide powder；
（2）Count by weight, 70~80 parts of 3~25mm graded broken stones particles, the nano-silica of 3~5 parts of activation are chosen respectively
Change titanium powder, 3~5 parts of iron tailings slags, 5~10 parts of quartz sands, 1~2 part of sodium nitrate and 1~3 part of barium nitrate are put into high-speed stirred
In machine, compound is obtained after being well mixed；
（3）Compound is divided into 3 parts, is respectively put into grinder and grinds, 0.3~0.8mm of particle diameter, particle diameter are ground to form respectively is
2~5mm and three kinds of particles that particle diameter is 10~20mm, obtain aggregate raw material after mixing.
Described polyacrylonitrile fibre can also be modified, and modification procedure is：
（1）Weigh epoxy resin to be added in reactor, sequentially add absolute ethyl alcohol and ethylene glycol monobutyl ether after heating stirring, protect
The diethanolamine solution of mass fraction 5% is added dropwise in the backward reactor of temperature stirring, follow-up continuous 2~4h of insulation reaction is added dropwise, modification is obtained
Liquid；
（2）Take polyacrylonitrile fibre and cutting short-forming fiber, count by weight, choose respectively 20~30 parts of chopped fibers, 100~
120 parts of modification liquids, 1~3 part of silane coupler and 2~4 parts of rosin resins, are put into baking oven after stirring mixing and dry to constant weight,
It can obtain modified acrylic fibre.
Described calcining heat is 500~600 DEG C, and calcination time is 3~6h.
Described absolute ethyl alcohol quality is epoxy resin quality 20~30%, and ethylene glycol monobutyl ether quality is asphalt mixtures modified by epoxy resin lipid
Amount 10~15%, diethanolamine solution quality is epoxy resin quality 2~4%.
Described silane coupler is N- aminoethyl -3- aminopropyltriethoxies dimethoxysilane, γ-glycidyl ether oxygen third
One kind in base trimethoxy silane, methacryloxypropyl trimethoxy silane.
The present invention is compared with other method, and advantageous effects are：
（1）The present invention is with graded broken stone particle, the nano titanium dioxide powder of activation, mine tailings, quartz sand, sodium nitrate and nitric acid
Barium is compound, and aggregate raw material, wherein coarse fodder formation skeleton are obtained after grinding, and fines is filled in coarse fodder skeleton space, is conducive to
Integrally-built compactness and stability are improved, has obvious to improving the intensity of graded broken stone material, resistance detrusion
Effect；（2）The present invention adds polyacrylonitrile fibre, and polyacrylonitrile fibre surface is changed with materials such as epoxy resin
Property, the mechanical property of modified polyacrylonitrile fibre greatly improved, after addition is in graded broken stone mixture, can be with
Improve and be unlikely to deform under the intensity and compression rebound modulu of graded broken stone structure sheaf, high pressure, and polyacrylonitrile fibre and expansion
After graphite is compound, the compression strength and volume stability of graded broken stone mixture can further improve.
Embodiment
Weigh titanium dioxide and be put into Muffle furnace, be warming up to 500~600 DEG C, 3~6h of high-temperature calcination takes out cooling, pours into and grind
Grind into powder in alms bowl, the nano titanium dioxide powder activated；Count by weight, respectively choose 70~80 part 3~
25mm graded broken stones particle, 10~20 parts of expanded graphites, nano titanium dioxide powder, 3~5 parts of iron tailings of 3~5 parts of activation
Slag, 5~10 parts of quartz sands, 1~2 part of sodium nitrate and 1~3 part of barium nitrate, is put into homogenizer, must be mixed after being well mixed
Material；Compound is divided into 3 parts, is respectively put into grinder and grinds, grind to form respectively 0.3~0.8mm of particle diameter, particle diameter for 2~
5mm and three kinds of particles that particle diameter is 10~20mm, obtain aggregate raw material after mixing；Weigh epoxy resin and be added to reactor
In, sequentially add the absolute ethyl alcohol of epoxy resin quality 20~30% and ring after being warming up to 82~85 DEG C, 15~20min of insulated and stirred
After the ethylene glycol monobutyl ether of oxygen resin quality 10~15%, 1~3h of insulated and stirred to reactor be slowly added dropwise epoxy resin quality 2~
The diethanolamine solution of 4% mass fraction 5%, is added dropwise follow-up continuous 2~4h of insulation reaction, and reaction is cooled to room temperature after terminating, and discharges, obtains
Modification liquid；Polyacrylonitrile fibre is taken, 5~7cm chopped fiber is cut into, counts by weight, chooses 20~30 parts short respectively
Baking is put into after fiber, 100~120 parts of modification liquids, 1~3 part of silane coupler and 2~4 parts of rosin resins, 1~2h of stirring mixing
Dried in case to constant weight, you can obtain modified acrylic fibre；Count by weight, 70~80 parts of aggregate originals are chosen respectively
Graded broken stone mixing is obtained after material, 5~7 parts of modified acrylic fibres and 10~20 parts of expanded graphites, 20~30min of stirring mixing
Material.Described silane coupler is N- aminoethyl -3- aminopropyltriethoxies dimethoxysilane, γ-glycidyl ether oxygen propyl three
Any one in methoxy silane, methacryloxypropyl trimethoxy silane.
Example 1
Weigh titanium dioxide and be put into Muffle furnace, be warming up to 600 DEG C, high-temperature calcination 6h takes out cooling, pours into mortar and pulverize
End, the nano titanium dioxide powder activated；Count by weight, 80 parts of 3~25mm graded broken stones particles, 20 are chosen respectively
Part expanded graphite, nano titanium dioxide powder, the 5 parts of iron tailings slags, 10 parts of quartz sands, 2 parts of sodium nitrate and 3 parts of nitre of 5 parts of activation
Sour barium, is put into homogenizer, and compound is obtained after being well mixed；Compound is divided into 3 parts, is respectively put into grinder and grinds
Mill, grinds to form three kinds of particles that particle diameter 0.8mm, particle diameter are 5mm and particle diameter is 20mm respectively, and aggregate raw material is obtained after mixing；
Weigh epoxy resin to be added in reactor, epoxy resin quality 30% is sequentially added after being warming up to 85 DEG C, insulated and stirred 20min
Asphalt mixtures modified by epoxy resin lipid is slowly added dropwise to reactor after absolute ethyl alcohol and the ethylene glycol monobutyl ether of epoxy resin quality 15%, insulated and stirred 3h
The diethanolamine solution of 4% mass fraction 5% is measured, follow-up continuous insulation reaction 4h is added dropwise, reaction is cooled to room temperature after terminating, and discharges, obtains
Modification liquid；Polyacrylonitrile fibre is taken, 7cm chopped fiber is cut into, counts by weight, 30 parts of chopped fibers, 120 are chosen respectively
Baking oven is put into after part modification liquid, 3 parts of γ-glycidyl ether oxygen propyl trimethoxy silicanes and 4 parts of rosin resins, stirring mixing 2h
Middle drying is to constant weight, you can obtain modified acrylic fibre；Count by weight, choose respectively 80 parts of aggregate raw materials, 7 parts change
Property polyacrylonitrile fibre and 20 parts of expanded graphites, after stirring mixing 30min graded broken stone mixture.
Example 2
Weigh titanium dioxide and be put into Muffle furnace, be warming up to 600 DEG C, high-temperature calcination 6h takes out cooling, pours into mortar and pulverize
End, the nano titanium dioxide powder activated；Count by weight, 80 parts of 3~25mm graded broken stones particles, 20 are chosen respectively
Part expanded graphite, nano titanium dioxide powder, the 5 parts of iron tailings slags, 10 parts of quartz sands, 2 parts of sodium nitrate and 3 parts of nitre of 5 parts of activation
Sour barium, is put into homogenizer, and compound is obtained after being well mixed；Compound is divided into 3 parts, is respectively put into grinder and grinds
Mill, grinds to form three kinds of particles that particle diameter 0.8mm, particle diameter are 5mm and particle diameter is 20mm respectively, and aggregate raw material is obtained after mixing；
Weigh epoxy resin to be added in reactor, epoxy resin quality 30% is sequentially added after being warming up to 85 DEG C, insulated and stirred 20min
Asphalt mixtures modified by epoxy resin lipid is slowly added dropwise to reactor after absolute ethyl alcohol and the ethylene glycol monobutyl ether of epoxy resin quality 15%, insulated and stirred 3h
The diethanolamine solution of 4% mass fraction 5% is measured, follow-up continuous insulation reaction 4h is added dropwise, reaction is cooled to room temperature after terminating, and discharges, obtains
Modification liquid；Count by weight, 80 parts of aggregate raw materials, 7 parts of polyacrylonitrile fibres and 20 parts of expanded graphites are chosen respectively, stirring is mixed
Close and graded broken stone mixture is obtained after 30min.
Reference examples：The graded broken stone mixture of Hunan Co., Ltd production.
The graded broken stone mixture of example and reference examples is prepared into test specimen with Static compaction method, the specification of test specimen is ф 100
Plastic bag sealing moisturizing is used after mm × 100mm, specimen molding, and is conserved under conditions of 20 ± 2 DEG C.To obtained test specimen
Detected, specific detection is as follows：
1. unconfined compression strength test：Test specimen is put on anti-folding and anti-pressing testing machine, compression test is carried out.Experiment
During, the increase of pressure constant speed, maximum pressure P during record destruction should be made（N）.
Calculation formula is：
In formula：Rc is unconfined compressive strength（MPa）, P is maximum pressure when test specimen is destroyed（N）, A is the sectional area of test specimen
（mm2）.
2. indirect tensile strength is tested：Test specimen is put on people's Marshall stability apparatus, placed respectively in the top and bottom of test specimen
One press strip, the deformation constant speed of experiment should be made in process of the test to be increased, and keeps speed about 1mm/min.Record test specimen destruction
When active force P（N）.
Calculation formula is：
In formula：RfFor indirect tensile strength（MPa）, P is active force when test specimen is destroyed（N）, H is the height of test specimen after immersion
（mm）.
Specific testing result is shown in Table 1.
Table 1
As shown in Table 1, the level that prepared by the present invention is high with graded broken stone mixture intensity, and compression rebound modulu is big, is unlikely to deform, can
It is widely used on road pavement.
Claims (5)
1. a kind of graded broken stone mixture, it is characterised in that：Count by weight, including：70~80 parts of aggregate raw materials, 5~7 parts
Polyacrylonitrile fibre and 10~20 parts of expanded graphites；
The preparation process of described aggregate raw material is：
（1）Weigh titanium dioxide and be put into after Muffle furnace, high-temperature calcination the nanometer two poured into grind into powder in mortar, activated
Titanium dioxide powder；
（2）Count by weight, 70~80 parts of 3~25mm graded broken stones particles, the nano-silica of 3~5 parts of activation are chosen respectively
Change titanium powder, 3~5 parts of iron tailings slags, 5~10 parts of quartz sands, 1~2 part of sodium nitrate and 1~3 part of barium nitrate are put into high-speed stirred
In machine, compound is obtained after being well mixed；
（3）Compound is divided into 3 parts, is respectively put into grinder and grinds, 0.3~0.8mm of particle diameter, particle diameter are ground to form respectively is
2~5mm and three kinds of particles that particle diameter is 10~20mm, obtain aggregate raw material after mixing.
2. a kind of graded broken stone mixture according to claim 1, it is characterised in that：Described polyacrylonitrile fibre may be used also
To be modified, modification procedure is：
（1）Weigh epoxy resin to be added in reactor, sequentially add absolute ethyl alcohol and ethylene glycol monobutyl ether after heating stirring, protect
The diethanolamine solution of mass fraction 5% is added dropwise in the backward reactor of temperature stirring, follow-up continuous 2~4h of insulation reaction is added dropwise, modification is obtained
Liquid；
（2）Take polyacrylonitrile fibre and cutting short-forming fiber, count by weight, choose respectively 20~30 parts of chopped fibers, 100~
120 parts of modification liquids, 1~3 part of silane coupler and 2~4 parts of rosin resins, are put into baking oven after stirring mixing and dry to constant weight,
It can obtain modified acrylic fibre.
3. a kind of graded broken stone mixture according to claim 1, it is characterised in that：Described calcining heat be 500~
600 DEG C, calcination time is 3~6h.
4. a kind of graded broken stone mixture according to claim 2, it is characterised in that：Described absolute ethyl alcohol quality is ring
Oxygen resin quality 20~30%, ethylene glycol monobutyl ether quality is epoxy resin quality 10~15%, and diethanolamine solution quality is ring
Oxygen resin quality 2~4%.
5. a kind of graded broken stone mixture according to claim 2, it is characterised in that：Described silane coupler is N- ammonia
Ethyl -3- aminopropyltriethoxies dimethoxysilane, γ-glycidyl ether oxygen propyl trimethoxy silicane, methacryloxy
Any one in propyl trimethoxy silicane.
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| CN201710508511.8A CN107311612A (en) | 2017-06-28 | 2017-06-28 | A kind of graded broken stone mixture |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112895028A (en) * | 2021-01-23 | 2021-06-04 | 浙江创通木业有限公司 | Formaldehyde-free artificial wood board and preparation method thereof |
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Application publication date: 20171103 |