CN109503032A - A kind of asphalt and preparation method thereof of physical modification red mud substitution miberal powder - Google Patents
A kind of asphalt and preparation method thereof of physical modification red mud substitution miberal powder Download PDFInfo
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- CN109503032A CN109503032A CN201910009205.9A CN201910009205A CN109503032A CN 109503032 A CN109503032 A CN 109503032A CN 201910009205 A CN201910009205 A CN 201910009205A CN 109503032 A CN109503032 A CN 109503032A
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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
- 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
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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
- 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
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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
- 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)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Road Paving Structures (AREA)
Abstract
The present invention relates to a kind of asphalts and preparation method thereof of physical modification red mud substitution miberal powder, belong to road engineering material and preparation technical field.Aqueous solution is made the described method includes: 1) be mixed in a certain ratio modified material and water；2) red mud broken, after drying is added according to a certain percentage in step 1) and stirs to get mixed serum in aqueous solution obtained；3) mixed serum obtained in step 2) is obtained into the physical modification red mud powder for asphalt processed by suction filtration, dry, shattering process；4) the substitution miberal powder of physical modification red mud powder obtained in step 3) is prepared into asphalt.By the present invention in that preparing asphalt with physical modification red mud substitution miberal powder, it can effectively improve the high temperature performance and anti-water damage ability of asphalt, the performance of asphalt be effectively ensured.
Description
Technical field
The invention belongs to road engineering material and preparation technical fields, are related to a kind of preparation method of asphalt, special
It is not to be related to a kind of asphalt and preparation method thereof using physical modification red mud substitution miberal powder.
Background technique
Red mud (Red mud or Bauxite residue) is that alumina producer alkaline process processing bauxite extracts aluminium oxide
The insoluble solid trade waste discharged afterwards shows red or brown because it is rich in iron oxide, therefore referred to as red mud.Every life
It produces the big appointment of 1 ton of aluminium oxide and generates 1.0-1.8 tons of red muds.China's aluminum i ndustry, which was stepped into since the nineties in last century, rapidly develops rank
Section, while aluminium oxide production capacity improves rapidly, the discharge amount of red mud is also growing.According to statistics, China's red mud accumulation stockpiling
Amount is more than 3.5 hundred million tons, and wherein the accumulation volume of cargo in storage of Shandong Province is more than 200,000,000 tons, and stockyard is taken up an area more than 13,000,000 square metres.2016
Year China red mud total release is about 80,000,000 tons, and consumption is only 3,200,000 tons, and comprehensive utilization ratio is less than 4%.At this stage,
The red mud of domestic and international Alumina Enterprise discharge is mainly conveyed to stacking field and is carried out by the way of " wet type conveying-dry type is stacked "
It builds a dam stacking.This outdoor stacking mode does not only take up a large amount of soils, expends a large amount of stockyard construction and arable land expense, simultaneously
Also security risk is brought to surrounding soil and underground water link.In China area with heavy rainfall, alkaline attached liquid in red mud and
Heavy metal ion can penetrate into soil with rainwater, to cause soil alkalization and underground water pollution, these harmful substances that can pass through
Underground water and crops enter human body, constitute a threat to the life security of the mankind.Meanwhile because red mud strong basicity, plant is difficult
With existence, red mud dump is directly exposed under rainwash erosion without vegetative coverage, easily the disasters such as initiation landslide, dam break.
As society is to the pay attention to day by day of safety in production and environmental protection, the discharge and stockpiling of red mud, which have become, restricts alumina industry hair
The heavy burden of important bottleneck and the regional society development and environmental protection of exhibition.
At the same time, with the development of the infrastructure constructions such as China's urban construction and highway, railway, engineering construction consumption
A large amount of non-renewable resources.Wherein, by the irrational extraction of resources of decades, the lime stone in the most areas in China has become dilute
Lack resource.According to statistics, the overall reserves of China's limestone are about 75,000,000,000 tons, are only capable of maintaining China's base by current depletion rate
Plinth design and construction demand at most 15 years.It is therein to fill out as main surface layer pavement material-asphalt of highway in China construction
Material part is limestone limestone mineral powder obtained after broken, levigate.The volume of filler accounts for about asphalt gross mass
5%, it is main rise filling gather materials skeleton gap, improve bitumen stiffness and raising gather materials-rubber cement adhesion the effects of, be that pitch is mixed
Close important component indispensable in material.And with the continuous consumption of Natural Resources in China, it is especially social in recent years right
The enhancing of environmental protection and natural resources protection consciousness, a large amount of limestone building stones factory close, and leading to building stones, supply falls short of demand, high-quality
Building stones have reached by the crazy degree robbed.At the same time, since a large amount of dust generated in limestone mineral powder production process is to sky
Makings amount generates and its negative impact, the underproof limestone mineral powder manufacturing enterprise in part are shut down rectification, lead to limestone
Miberal powder price rises year by year, brings serious cost pressure to investments in highway building unit and construction enterprises.Therefore, exploitation at
The limestone mineral powder alternative materials that this is controllable, performance is stable, research are suitable for the asphalt preparation process of alternative materials, are
Highway construction field critical issue urgently to be resolved.
Patent CN105753375A discloses a kind of asphalt and preparation method thereof for making filler using red mud, each group
Point weight proportion be respectively as follows: 30~80 parts of coarse aggregate, 20~70 parts of fine aggregate, 3~6 parts of pitch, 3~6 parts of filler, filler is
The weight proportion of the mixture of limestone dust and red mud, limestone dust and red mud is (1~3): (1~3).Preparation method is such as
Under: 1. red mud is dried it is levigate, according to the ratio with limestone dust mix, then in 160~180 DEG C of pre- stand-by heats；2. by thickness
Gather materials after 160~180 DEG C of preheatings, it is uniform that asphalt mixing is added；3. the filler of preheating is added to 2. mixing that step is prepared
It is mixed thoroughly in material.The present invention can not only accomplish to turn waste into wealth, subtract using industrial waste red mud as the filler of asphalt
Few land seizure area and environmental pollution, can also reduce the material cost for preparing asphalt, while can improve pitch mixing
The pavement performance of material should be widely promoted and use.
Summary of the invention
The technical problems to be solved by the present invention are: providing a kind of using physical modification red mud as the mixing of the pitch of miberal powder
Material and preparation method thereof, industrial wastes red mud is used in asphalt, is reduced the cost using miberal powder and is improved environment.
To realize the above-mentioned technical purpose, The technical solution adopted by the invention is as follows:
A kind of physical modification red mud for replacement miberal powder, the following raw material composition: red mud, modified material, the weight of the two
Proportion is 1:0.1~0.5；
The red mud is at least one of red mud from sintering process or Bayer process red mud；
The application research discovery: the modified material of single composition can only often improve certain aspect performance of red mud,
It is difficult to substitute miberal powder, the requirement of asphalt.For this purpose, the application to current several common asphalt modification mixtures into
It has gone after compounding, discovery: calcium hydroxide, flyash in cement, are suitably added a certain amount of blast-furnace cinder, white clay and carbide slag
Mixture, the comprehensive performance of changed red mud can be effectively improved, guarantee that the dynamic stability of asphalt, Marshall are stablized
Degree, maximum bending strain are not less than hot-mix asphalt mixture.
The modified material is calcium hydroxide, flyash, cement, blast-furnace cinder, white clay and carbide slag.
Addition calcium hydroxide and cement can significantly improve the water stability of obtained asphalt；
In some embodiments, the flyash is that a kind of industrial solid that thermal power plant pulverized coal fired boiler excludes is discarded
Object.Addition flyash and blast-furnace cinder can then significantly improve the high-temperature stability of asphalt；
In some embodiments, the blast-furnace cinder is a kind of solid waste excluded from blast furnace in manUfaCtUre of pig iron
Object.Addition flyash and blast-furnace cinder can then significantly improve the high-temperature stability of asphalt；
In some embodiments, the white clay is the solid waste pollution that paper industry generates in alkali recovery process
Object.Addition white clay and carbide slag then have a distinct increment for water stability and low-temperature cracking-resistance.
In some embodiments, the ancillary industry generated when the carbide slag is using calcium carbide method acetylene production is discarded
Object.Addition white clay and carbide slag then have a distinct increment for water stability and low-temperature cracking-resistance.
And processing lower, for modified material is required preparation process when preparing asphalt using above-mentioned material
Also relatively simple.
Processing of the application for modified material: being put into 105 DEG C of baking ovens dry 1-3h for modified material and remove moisture removal, it
Afterwards using high speed disintegrator it is levigate into " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004) to required by filler
Partial size.
It is insufficient that traditional changed red mud water stability can be improved well using calcium hydroxide, flyash and modified cement red mud
The characteristics of.
Compared to traditional limestone dust is used, the asphalt using this physical modification red mud substitution miberal powder exists
It is performed better than in high-temperature stability and low-temperature cracking-resistance.
In some embodiments, the red mud carries out after drying levigate processing, and granularity meets " asphalt highway construction skill
Art specification " requirement in (JTGF40-2004) one to filler, and appearance is agglomerated without granule.
The present invention also provides a kind of above-mentioned preparation methods for the physical modification red mud instead of miberal powder, comprising:
Red mud is crushed, it is dry, it is then levigate to " standard specification for construction and acceptance of highway asphalt pavement " (JTGF40-2004)
In to partial size required by filler, obtain levigate red mud；
Modified material is poured into water, is uniformly mixed, obtains modified material aqueous solution；
Above-mentioned levigate red mud is poured into modified material aqueous solution, is uniformly mixed, obtains changed red mud slurries；
By changed red mud slurries into dehydration, drying, it is crushed, is levigate to " standard specification for construction and acceptance of highway asphalt pavement "
(JTGF40-2004) to partial size required by filler to get physical modification red mud in.
In some embodiments, the mass ratio of the quality of the modified material and water is 0.1~0.4:1.
In some embodiments, the dehydration is by the way of filtering.
In some embodiments, the drying condition is dry 1~3h in 101~105 DEG C of baking ovens.
The present invention also provides a kind of asphalt preparation methods using physical modification red mud substitution miberal powder, comprising:
(1) above-mentioned physical modification red mud is dried, the substitution filler as asphalt；
(2) coarse aggregate and fine aggregate are preheated, it is spare as gathering materials for asphalt；
(3) matrix pitch or modified pitch preheating 1-3h are made into its thawing；
(4) coarse aggregate centainly matched and fine aggregate are placed in asphalt to mix in pot, dry mixing, thickness is made to gather materials progress
Premixing；
(5) road matrix pitch is heated into 1-2h under the conditions of 135 DEG C, is then added in thickness is gathered materials according to match ratio
It is reused after the road matrix pitch of the parts by weight and mixes pot stirring 1-3min until uniformly；
(6) filler after preheating in step (1) is added in mixture prepared in step (3) and is stirred using mixing and stirring pot
30-60s is mixed until uniformly to get asphalt for road.
In some embodiments, the type of the asphalt is AC-13, AC-20, AC-25 or SMA-13.
In some embodiments, the preheating temperature gathered materials is the preheating temperature of 160-180 DEG C, matrix pitch or modified pitch
It is 140-160 DEG C.
The present invention also provides the asphalts of any above-mentioned method preparation.
The beneficial effects of the present invention are:
(1) chemical composition of the invention according to industrial red mud itself, and calcium hydroxide, flyash, cement, Blast Furnace Ore is added
Slag, white clay and carbide slag are used to substitute miberal powder by making a kind of physical modification red mud and mix in asphalt, be effectively ensured
The mechanical property of asphalt.
(2) test proves that, after physical modification red mud prepared by the present invention is added, it is ensured that asphalt
Integral strength, to guarantee the structural stability of bituminous pavement.
(3) test proves that, the freeze thawing that the addition of physical modification red mud of the present invention significantly improves asphalt is split
Resistance to spalling ratio can be effectively improved the water resistant damage capability of bituminous pavement.
(4) test proves that, after physical modification red mud prepared by the present invention is added, it is ensured that asphalt
Dynamic stability, Marshall stability, maximum bending strain are not less than hot-mix asphalt mixture, it was demonstrated that physical modification of the invention
The high temperature performance of asphalt can be effectively ensured in red mud.
(5) for raw materials for production angle, the present invention can efficiently use various solid wastes, not only have significant
Environmental benefit can also reduce the overall cost of asphalt.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used in this application have logical with the application person of an ordinary skill in the technical field
The identical meanings understood.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
As background technique is introduced, replaced for the limestone mineral powder that development cost is controllable, performance is stable is badly in need of at present
The problem of for material.Therefore, the present invention proposes a kind of physical modification red mud, is made of the following raw material: red mud, modified material, two
The weight proportion of person is 1:0.1~0.5.
In some embodiments, the industrial pollution being discharged when the red mud is aluminium industry extraction aluminium oxide is discarded
Object.Red mud is carried out to dry levigate processing, granularity meets " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004) one
In requirement to filler, and appearance is agglomerated without granule.
In some embodiments, the red mud be red mud from sintering process, it is one or two kinds of in Bayer process red mud.
In some embodiments, the modified material is calcium hydroxide, flyash, cement, blast-furnace cinder, white clay and calcium carbide
Slag, mass ratio are 1:2~3:1~3:3~5:2~6:1~5.
The preparation method for the physical modification red mud that the present invention also provides a kind of for replacing miberal powder, comprising:
(1) red mud is carried out routine first to be just crushed, places into dry 1-3h in 105 DEG C of baking ovens and remove moisture removal, makes later
With high speed disintegrator it is levigate into " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004) to grain required by filler
Diameter；
(2) a certain amount of modified material is poured into water, is stirred under 100-300 revs/min of revolving speed with reinforcement blender
It mixes them thoroughly within 10-20 minutes, wherein the mass ratio of the quality of modified material and water is 0.1~0.4:1；
(3) a certain amount of levigate red mud is poured into modified material aqueous solution, with reinforcement blender at 100-300 revs/min
It stirs 10-20 minutes and mixes them thoroughly under revolving speed, wherein red mud and the mass ratio of modified material are 1:0.1~0.5；
(4) in order to remove the moisture in mixed serum, well-mixed changed red mud slurries are poured into bottle,suction, are carried out
It filters, is put into togerther to dry 1-3 hours in 105 DEG C of baking oven by filter paper and filter residue after the completion of suction filtration and removes moisture removal；
(5) filter paper and filter residue are taken out, filter residue is removed from filter paper, and filter residue is crushed and levigate to " public affairs
Road Asphalt Pavement Construction Technique specification " in (JTG F40-2004) to partial size required by filler, obtain the physics at this time
Changed red mud.
A kind of asphalt preparation method using physical modification red mud substitution miberal powder, can prepare different types of drip
Green mixture, such as AC-13, AC-20, AC-25, SMA-13.
The preparation method of asphalt recited above, the specific steps of which are as follows:
(1) the physical modification red mud after will be levigate dries 3h under the conditions of 105 DEG C and removes moisture removal, as asphalt
Substitute filler.
(2) coarse aggregate and fine aggregate are preheated into 1-3h under the conditions of 160-180 DEG C, it is standby as gathering materials for asphalt
With；
(3) matrix pitch or modified pitch are preheated to 1-3h under the conditions of 140-160 DEG C makes its thawing；
(4) coarse aggregate centainly matched and fine aggregate are placed in asphalt to mix in pot, are done under the conditions of 160-180 DEG C
It mixes 30-60 seconds, so that thickness is gathered materials and be pre-mixed.
(5) to prepare AC asphalt, road matrix pitch is heated into 1-2h under the conditions of 135 DEG C, then according to
Match ratio, which is added after the road matrix pitch of the parts by weight to reuse in thickness is gathered materials, mixes pot stirring 1-3min until uniformly,
To prepare SMA asphalt, then modified pitch is used；
(6) filler after preheating in step (1) is added in mixture prepared in step (3) and is stirred using mixing and stirring pot
30-60s is mixed until uniformly to get asphalt for road.
In order to enable those skilled in the art can clearly understand technical solution of the present invention, below with reference to tool
The embodiment of body and the technical solution that the present invention will be described in detail.
Embodiment 1:
1, a kind of asphalt of physical modification red mud substitution miberal powder, by mass percentage, including following component: 0-
20%, the 10-15cm's that gathers materials of 40%, the 5-10cm that gathers materials of 5cm gathers materials 30%, No. 70 matrix bi tumenf orr oads 4.5%, object
Changed red mud 5.5% is managed, described to gather materials using basalt, all technical meets " standard specification for construction and acceptance of highway asphalt pavement "
Related request in (JTG F40-2004).Asphalt type: AC-20.
Red mud used in the physical modification red mud is red mud from sintering process, and modified material is calcium hydroxide, flyash, water
Mud, blast-furnace cinder, white clay and carbide slag, mass ratio 1:2:1.5:3:4.5:3.
The physical modification red mud is the mixture of red mud and calcium hydroxide, and the mass ratio of red mud and modified material is 1:0.5.
2, the asphalt of above-mentioned physical modification red mud substitution miberal powder the preparation method is as follows:
(1) red mud from sintering process is carried out routine first to be crushed, is then placed in 105 DEG C of baking ovens dry 3h and removes moisture removal, it
Afterwards using high-speed breakage crusher machine 2min it is levigate into " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004) to filling out
The required partial size of material；
(2) a certain amount of modified material is poured into water, is stirred under 100-300 revs/min of revolving speed with reinforcement blender
It mixes them thoroughly within 20 minutes, wherein the mass ratio of the quality of modified material and water is 0.4:1；
(3) red mud that a certain amount of step (1) obtains is poured into modified material aqueous solution, with reinforcement blender in 100-
It stirs 20 minutes and mixes them thoroughly under 300 revs/min of revolving speed, wherein red mud and the mass ratio of modified material are 1:0.5；
(4) it in order to which by the moisture removal in mixed serum, well-mixed changed red mud slurries are poured into bottle,suction, takes out
3min is filtered, is put into togerther filter paper and filter residue after the completion of suction filtration 3 hours dry in the baking oven that temperature is 105 DEG C；
(5) filter paper and filter residue are taken out, filter residue is removed from filter paper, and high-speed breakage crusher machine is used to filter residue
3min is levigate into " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004) to partial size required by filler, at this time
To the physical modification red mud.
(6) physical modification red mud described in step (3) is dried under the conditions of 105 DEG C 3h and removes moisture removal, it is mixed as pitch
Close the substitution filler of material.
(7) coarse aggregate and fine aggregate are preheated into 1h under the conditions of 160-180 DEG C, it is spare as gathering materials for asphalt；
(8) coarse aggregate centainly matched and fine aggregate are placed in asphalt to mix in pot, are done under the conditions of 160-180 DEG C
30s is mixed, so that thickness is gathered materials and is pre-mixed.
(9) road matrix pitch is heated into 1-2h under the conditions of 135 DEG C, is then added in thickness is gathered materials according to match ratio
It is reused after the road matrix pitch of the parts by weight and mixes pot stirring 1-3min until uniformly；
(10) filler after preheating in step (6) is added in mixture prepared in step (9) and is stirred with mixing pot
30s is until uniformly to get asphalt for road.
Embodiment 2:
1, a kind of asphalt of physical modification red mud substitution miberal powder, by mass percentage, including following component: 0-
20%, the 10-15cm's that gathers materials of 40%, the 5-10cm that gathers materials of 5cm gathers materials 30%, No. 70 matrix bi tumenf orr oads 4.5%, object
Changed red mud 5.5% is managed, described to gather materials using basalt, all technical meets " standard specification for construction and acceptance of highway asphalt pavement "
Related request in (JTG F40-2004).Asphalt type: AC-20.
Red mud used in the physical modification red mud is red mud from sintering process, and modified material is calcium hydroxide, flyash, water
Mud, blast-furnace cinder, white clay and carbide slag, mass ratio 1:3:2:3:4.5:3.
The physical modification red mud is the mixture of red mud and modified material, and the mass ratio of red mud and modified material is 1:
0.1。
2, the asphalt of above-mentioned physical modification red mud substitution miberal powder the preparation method is as follows:
(1) red mud from sintering process is carried out routine first to be crushed, is then placed in 105 DEG C of baking ovens dry 3h and removes moisture removal, it
Afterwards using high-speed breakage crusher machine 2min it is levigate into " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004) to filling out
The required partial size of material；
(2) a certain amount of modified material is poured into water, is stirred under 100-300 revs/min of revolving speed with reinforcement blender
It mixes them thoroughly within 20 minutes, wherein the mass ratio of the quality of modified material and water is 0.1:1；
(3) red mud that a certain amount of step (1) obtains is poured into modified material aqueous solution, with reinforcement blender in 100-
It stirs 20 minutes and mixes them thoroughly under 300 revs/min of revolving speed, wherein red mud and the mass ratio of modified material are 1:0.1；
(4) it in order to which by the moisture removal in mixed serum, well-mixed changed red mud slurries are poured into bottle,suction, takes out
3min is filtered, is put into togerther filter paper and filter residue after the completion of suction filtration 3 hours dry in the baking oven that temperature is 105 DEG C；
(5) filter paper and filter residue are taken out, filter residue is removed from filter paper, and high-speed breakage crusher machine is used to filter residue
3min is levigate into " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004) to partial size required by filler, at this time
To the physical modification red mud.
(6) physical modification red mud described in step (3) is dried under the conditions of 105 DEG C 3h and removes moisture removal, it is mixed as pitch
Close the substitution filler of material.
(7) coarse aggregate and fine aggregate are preheated into 1h under the conditions of 160-180 DEG C, it is spare as gathering materials for asphalt；
(8) coarse aggregate centainly matched and fine aggregate are placed in asphalt to mix in pot, are done under the conditions of 160-180 DEG C
30s is mixed, so that thickness is gathered materials and is pre-mixed.
(9) road matrix pitch is heated into 1-2h under the conditions of 135 DEG C, is then added in thickness is gathered materials according to match ratio
It is reused after the road matrix pitch of the parts by weight and mixes pot stirring 1-3min until uniformly；
(10) filler after preheating in step (6) is added in mixture prepared in step (9) and is stirred with mixing pot
30s is until uniformly to get asphalt for road.
Embodiment 3:
1, a kind of asphalt of physical modification red mud substitution miberal powder, by mass percentage, including following component: 0-
20%, the 10-15cm's that gathers materials of 40%, the 5-10cm that gathers materials of 5cm gathers materials 30%, No. 70 matrix bi tumenf orr oads 4.5%, object
Changed red mud 5.5% is managed, described to gather materials using basalt, all technical meets " standard specification for construction and acceptance of highway asphalt pavement "
Related request in (JTG F40-2004).Asphalt type: AC-20.
Red mud used in the physical modification red mud is Bayer process red mud, and modified material is calcium hydroxide, flyash, water
Mud, blast-furnace cinder, white clay and carbide slag, mass ratio 1:2.5:1.5:3:4:3.
The physical modification red mud is the mixture of red mud and modified material, and the mass ratio of red mud and modified material is 1:
0.5。
2, the asphalt of above-mentioned physical modification red mud substitution miberal powder the preparation method is as follows:
(1) Bayer process red mud is carried out routine first to be crushed, is then placed in 105 DEG C of baking ovens dry 3h and removes moisture removal, it
Afterwards using high-speed breakage crusher machine 2min it is levigate into " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004) to filling out
The required partial size of material；
(2) a certain amount of modified material is poured into water, is stirred under 100-300 revs/min of revolving speed with reinforcement blender
It mixes them thoroughly within 20 minutes, wherein the mass ratio of the quality of modified material and water is 0.4:1；
(3) red mud that a certain amount of step (1) obtains is poured into modified material aqueous solution, with reinforcement blender in 100-
It stirs 20 minutes and mixes them thoroughly under 300 revs/min of revolving speed, wherein red mud and the mass ratio of modified material are 1:0.5；
(4) it in order to which by the moisture removal in mixed serum, well-mixed changed red mud slurries are poured into bottle,suction, takes out
3min is filtered, is put into togerther filter paper and filter residue after the completion of suction filtration 3 hours dry in the baking oven that temperature is 105 DEG C；
(5) filter paper and filter residue are taken out, filter residue is removed from filter paper, and high-speed breakage crusher machine is used to filter residue
3min is levigate into " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004) to partial size required by filler, at this time
To the physical modification red mud.
(6) physical modification red mud described in step (3) is dried under the conditions of 105 DEG C 3h and removes moisture removal, it is mixed as pitch
Close the substitution filler of material.
(7) coarse aggregate and fine aggregate are preheated into 1h under the conditions of 160-180 DEG C, it is spare as gathering materials for asphalt；
(8) coarse aggregate centainly matched and fine aggregate are placed in asphalt to mix in pot, are done under the conditions of 160-180 DEG C
30s is mixed, so that thickness is gathered materials and is pre-mixed.
(9) road matrix pitch is heated into 1-2h under the conditions of 135 DEG C, is then added in thickness is gathered materials according to match ratio
It is reused after the road matrix pitch of the parts by weight and mixes pot stirring 1-3min until uniformly；
(10) filler after preheating in step (6) is added in mixture prepared in step (9) and is stirred with mixing pot
30s is until uniformly to get asphalt for road.
Embodiment 4:
1, a kind of asphalt of physical modification red mud substitution miberal powder, by mass percentage, including following component: 0-
20%, the 10-15cm's that gathers materials of 40%, the 5-10cm that gathers materials of 5cm gathers materials 30%, No. 70 matrix bi tumenf orr oads 4.5%, object
Changed red mud 5.5% is managed, described to gather materials using basalt, all technical meets " standard specification for construction and acceptance of highway asphalt pavement "
Related request in (JTG F40-2004).Asphalt type: AC-20.
Red mud used in the physical modification red mud is Bayer process red mud, and modified material is modified material, flyash, water
Mud, blast-furnace cinder, white clay and carbide slag, mass ratio 1:3:3:3.5:5:2.
The physical modification red mud is the mixture of red mud and modified material, and the mass ratio of red mud and modified material is 1:
0.1。
2, the asphalt of above-mentioned physical modification red mud substitution miberal powder the preparation method is as follows:
(1) Bayer process red mud is carried out routine first to be crushed, is then placed in 105 DEG C of baking ovens dry 3h and removes moisture removal, it
Afterwards using high-speed breakage crusher machine 2min it is levigate into " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004) to filling out
The required partial size of material；
(2) a certain amount of modified material is poured into water, is stirred under 100-300 revs/min of revolving speed with reinforcement blender
It mixes them thoroughly within 20 minutes, wherein the mass ratio of the quality of modified material and water is 0.1:1；
(3) red mud that a certain amount of step (1) obtains is poured into modified material aqueous solution, with reinforcement blender in 100-
It stirs 20 minutes and mixes them thoroughly under 300 revs/min of revolving speed, wherein red mud and the mass ratio of modified material are 1:0.1；
(4) it in order to which by the moisture removal in mixed serum, well-mixed changed red mud slurries are poured into bottle,suction, takes out
3min is filtered, is put into togerther filter paper and filter residue after the completion of suction filtration 3 hours dry in the baking oven that temperature is 105 DEG C；
(5) filter paper and filter residue are taken out, filter residue is removed from filter paper, and high-speed breakage crusher machine is used to filter residue
3min is levigate into " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004) to partial size required by filler, at this time
To the physical modification red mud.
(6) physical modification red mud described in step (3) is dried under the conditions of 105 DEG C 3h and removes moisture removal, mixed as pitch
The substitution filler of material.
(7) coarse aggregate and fine aggregate are preheated into 1h under the conditions of 160-180 DEG C, it is spare as gathering materials for asphalt；
(8) coarse aggregate centainly matched and fine aggregate are placed in asphalt to mix in pot, are done under the conditions of 160-180 DEG C
30s is mixed, so that thickness is gathered materials and is pre-mixed.
(9) road matrix pitch is heated into 1-2h under the conditions of 135 DEG C, is then added in thickness is gathered materials according to match ratio
It is reused after the road matrix pitch of the parts by weight and mixes pot stirring 1-3min until uniformly；
(10) filler after preheating in step (6) is added in mixture prepared in step (9) and is stirred with mixing pot
30s is until uniformly to get asphalt for road.
The common red mud of comparative example 1
Raw material proportioning and the preparation method is the same as that of Example 1, the difference is that, it is red mud from sintering process that red mud, which uses, not plus
Enter modified material.
Comparative example 2AC-20
Raw material proportioning and the preparation method is the same as that of Example 1, the difference is that, red mud is using ground granulated blast furnace slag replacement.
Performance test:
In order to evaluate the performance of physical modification red mud asphalt, while it is identical as raw material to be prepared for a kind of gradation,
Asphalt sample as a comparison using limestone mineral powder as filler.Referring to " highway engineering pitch and asphalt examination
Test regulation " experiment process of (JTG E20-2011), integral strength, high-temperature behavior, low has been carried out to above-mentioned 5 kinds of asphalts
The evaluation of warm nature energy, water stability, specific evaluation index are shown in Table 1
Table 1
By the above the performance test results it can be seen that passing through progress after (1) addition physical modification red mud prepared by the present invention
The freeze-thaw split intensity ratio and immersion residual stability for the asphalt that indirect tensile test on frozen-thaw and immersion Marshall test obtain
It significantly improves, illustrates that physical modification red mud prepared by the present invention can effectively improve the water stability of asphalt.(2) it is added
After physical modification red mud prepared by the present invention, the asphalt that the girder bend test by carrying out asphalt obtains is most
Macrobending strain significantly improves, illustrate physical modification red mud prepared by the present invention can effectively improve asphalt low temperature it is anti-
Fragility.(3) it after physical modification red mud prepared by the present invention being added, is obtained by carrying out Marshall stability test and wheel tracking test
Asphalt Marshall stability and dynamic stability significantly improve, illustrate that physical modification red mud prepared by the present invention can be with
Effectively improve the high-temperature stability of asphalt.
Finally it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not limited to this hair
It is bright, although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still
It can modify to technical solution documented by previous embodiment, or part is equivalently replaced.It is all in this hair
Within bright spirit and principle, any modification, equivalent replacement, improvement and so on should be included in protection scope of the present invention
Within.Above-mentioned, although specific embodiments of the present invention have been described, and it is not intended to limit the protection scope of the present invention, institute
Category field technical staff should be understood that based on the technical solutions of the present invention those skilled in the art do not need to pay wound
The various modifications or changes that the property made labour can be made are still within protection scope of the present invention.
Claims (10)
1. a kind of for replacing the physical modification red mud of miberal powder, which is characterized in that the following raw material composition: red mud, modified material, two
The weight proportion of person is 1:0.1~0.5；
The red mud is at least one of red mud from sintering process or Bayer process red mud；
The modified material is calcium hydroxide, flyash, cement, blast-furnace cinder, white clay and carbide slag, and mass ratio is 1:2~3:1
~3:3~5:2~6:1~5.
2. red mud as described in claim 1, which is characterized in that the red mud carries out after drying levigate processing, and granularity meets " public
Road Asphalt Pavement Construction Technique specification " requirement in (JTGF40-2004) one to filler, and appearance is agglomerated without granule.
3. a kind of preparation method of any of claims 1 or 2 for the physical modification red mud instead of miberal powder, which is characterized in that
Include:
Red mud is crushed, it is dry, it is then levigate right into " standard specification for construction and acceptance of highway asphalt pavement " (JTGF40-2004)
Partial size required by filler obtains levigate red mud；
Modified material is poured into water, is uniformly mixed, obtains modified material aqueous solution；
Above-mentioned levigate red mud is poured into modified material aqueous solution, is uniformly mixed, obtains changed red mud slurries；
By changed red mud slurries into dehydration, drying, it is crushed, is levigate to " standard specification for construction and acceptance of highway asphalt pavement " (JTGF40-
2004) to partial size required by filler to get physical modification red mud in.
4. the method as described in claim 1, which is characterized in that the mass ratio of the quality of the modified material and water is 0.1
~0.4:1.
5. the method as described in claim 1, which is characterized in that the dehydration is by the way of filtering.
6. the method as described in claim 1, which is characterized in that the drying condition is dry 1 in 101~105 DEG C of baking ovens
~3h.
7. a kind of asphalt preparation method using physical modification red mud substitution miberal powder characterized by comprising
(1) physical modification red mud of any of claims 1 or 2 is dried, the substitution filler as asphalt；
(2) coarse aggregate and fine aggregate are preheated, it is spare as gathering materials for asphalt；
(3) matrix pitch or modified pitch preheating 1-3h are made into its thawing；
(4) coarse aggregate centainly matched and fine aggregate are placed in asphalt to mix in pot, dry mixing, so that thickness is gathered materials and is premixed
It closes；
(5) road matrix pitch is heated into 1-2h under the conditions of 135 DEG C, be then added in thickness is gathered materials according to match ratio described in
It is reused after the road matrix pitch of parts by weight and mixes pot stirring 1-3min until uniformly；
(6) filler after preheating in step (1) is added in mixture prepared in step (3) and is stirred using mixing and stirring pot
30-60s is until uniformly to get asphalt for road.
8. the method for claim 7, which is characterized in that the type of the asphalt is AC-13, AC-20, AC-
25 or SMA-13.
9. the method for claim 7, which is characterized in that the preheating temperature gathered materials is 160-180 DEG C, matrix pitch or changes
Property pitch preheating temperature be 140-160 DEG C.
10. the asphalt of the described in any item method preparations of claim 7-9.
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