CN109293280A - A kind of bituminous concrete and its preparation process - Google Patents
A kind of bituminous concrete and its preparation process Download PDFInfo
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- CN109293280A CN109293280A CN201811047016.2A CN201811047016A CN109293280A CN 109293280 A CN109293280 A CN 109293280A CN 201811047016 A CN201811047016 A CN 201811047016A CN 109293280 A CN109293280 A CN 109293280A
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention discloses a kind of bituminous concrete and its preparation processes, are related to concrete production manufacturing technology field, solve the problems, such as that bituminous concrete in the prior art is easy to happen cracking because its internal bond strength is lower in use.A kind of bituminous concrete, the component including following parts by weight: 70~80 parts of basalt masterbatch；6~12 parts of pitch；2~4 parts of miberal powder；8~10 parts of iron tailings masterbatch；1.5~2.5 parts of cement；0.7~1.4 part of anti-rut agent；1.1~1.8 parts of silicon carbide.The obtained bituminous concrete of the present invention has good structural strength after use, and is not susceptible to be broken.
Description
Technical field
The present invention relates to concrete production manufacturing technology field, more specifically, it relates to a kind of bituminous concrete and its
Preparation process.
Background technique
Bituminous concrete is commonly called as bitumen concrete, and artificial selection has the mineral aggregate of certain gradation composition, rubble or grating gravel, stone
Bits or sand, miberal powder etc., with a certain proportion of bitumen for road use material, the mixture made of mixing under the conditions of strict control.
A kind of sericite modified bituminous concrete is disclosed in the Chinese invention patent of Publication No. CN103553443A,
It is made of raw material from the following weight: 100 parts of mineral aggregate, 4~7 parts of pitch, 0.5~2 part of sericite in powder, 0.1~4 part of coupling agent；
The coupling agent is silane coupling agent, titanate coupling agent or aluminate coupling agent, and the gradation types of the mineral aggregate are GAC-13
Type, AC-13 type, AM-13 grades, SMA-13 type, OGFC-13 type or superpave type.The pitch is bi tumenf orr oad, coal
Pitch, SBS modified pitch, SBR modified pitch or natural rubber modified pitch.
In above-mentioned patent, sericite in powder is aluminosilicate of the stratiform containing potassium, it is to clip one layer by two layers of oxygen-octahedron
The resettable layer that alumina octahedral is constituted, though combination itself is firm, the combination between two compound silica layers is very faint, therefore thin,tough silk
Mica easily splits along plane locating for cation very much, and the sericite modified bituminous concrete is caused to be easy in use
It cracks, it is, therefore, desirable to provide a kind of new scheme solves the above problems.
Summary of the invention
It is easy to happen out in use because its internal bond strength is lower for bituminous concrete in the prior art
The problem of splitting, the purpose of the present invention one are to provide a kind of bituminous concrete have good structural strength after use, and
It is not susceptible to be broken.
To achieve the above object one, the present invention provides the following technical scheme that
A kind of bituminous concrete, which is characterized in that the component including following parts by weight:
70~80 parts of basalt masterbatch；
6~12 parts of pitch；
2~4 parts of miberal powder；
8~10 parts of iron tailings masterbatch；
1.5~2.5 parts of cement；
0.7~1.4 part of anti-rut agent；
1.1~1.8 parts of silicon carbide.
By using above-mentioned technical proposal, in existing production, not only needs iron tailings discarding to occupy a large amount of soils, give
The ecological environment of surrounding causes very big injury, and to put into respectively processing and maintenance cost.And carry out iron tailings resource
Synthetical recovery and utilization, can not only make full use of mineral resources, expand mineral resource utilization range, extend mine service year
The important means of limit and pollution administration, protecting ecology.At the same time it can also save a large amount of soil and fund, solves employment and ask
Topic, bring benefit to the mankind society, realizes effective unification of economy of resources, economic benefit, social benefit and environmental benefit.
Miberal powder plays filling effect in asphalt, it is therefore an objective to which the gap for reducing bituminous concrete is sometimes referred to as filled out
Material.Asphalt mastic is collectively formed in miberal powder and pitch, improves the strength and stability of bituminous concrete.Meanwhile miberal powder and pitch
It forms colloid and adheres to basalt surface, obtained from most of miberal powder itself is ground with igneous rock and ore, meta-alkalescence and pitch are very
Good adherency basalt surface, so that also making basalt between basalt masterbatch other than very stiff and demanding skeleton produced by insert molding
More bonds between masterbatch.
Contain a large amount of silica in basalt masterbatch, quality is hard, it can be mixed in bituminous concrete, can be with
Make bituminous concrete weight saving, and sturdy and durable.Contain a large amount of silica and aluminium oxide in iron tailings, with basalt mother
Material has good associativity, and bituminous concrete is made to have good intensity.Meanwhile basalt masterbatch, iron tailings and pitch it
Between form well stable colloid net, and silicon carbide has good wear-resisting property and intensity, can be filled in colloid net
In the gap in portion, closely bonding each raw material component together greatly improves the structural strength of bituminous concrete, is not susceptible to
Fracture.
Further preferably, the basalt masterbatch is respectively the basalt of 0~3mm, 3~5mm, 5~18mm by partial size
Particle is according to (2~3): (3~4): the weight fraction ratio of (5~6) mixes.
By using above-mentioned technical proposal, basalt made of the basalt particle for selecting particle size different is mixed is female
Material can form the colloid net that density is met each other in the inside of bituminous concrete with iron tailings and pitch, can cope with different size
Extrudate extruding that it is generated, making bituminous concrete in actual use has good structural strength.It will be above-mentioned
Basalt particle is mixed according to the ratio of 2:3:5, so that colloid net is had good space structure in the inside of bituminous concrete, is made
Bituminous concrete is not susceptible to be broken.
Further preferably, the iron tailings masterbatch is by Anshan high-silicon type iron tailings, horse steel high alumina sections tailing and Handan Xing
It is mixed by any weight fraction ratio for any two or three in high contents of calcium and magnesium sections tailing.
By using above-mentioned technical proposal, different types of iron tailings is selected to mix, there is iron tailings masterbatch not
It is corresponding with the partial size of basalt particle in basalt masterbatch with the particle diameter of size, be conducive to that there is above-mentioned colloid net
Uniform and stable structure keeps bituminous concrete with good stability.Meanwhile different types of iron tailings, internal is each
Ingredient type and content are different, are conducive to make have good conjugation between each component in bituminous concrete, improve drip
The structural strength of green concrete makes it be not susceptible to be broken.
Further preferably, the iron tailings masterbatch is pre-processed, and the following steps are included:
Step a, takes the iron tailings masterbatch of corresponding parts by weight, and the feldspar of corresponding parts by weight is added and bentonite is mixed
Uniformly, mixing speed is 400~800rpm, and mixing time is 30~40min, obtains mixture；
Step b, mixture is dried, and at 80~100 DEG C, the time is 60~90min for temperature control；
Mixture after drying is carried out ball milling, and carries out sieve material with the sieve of 200~300 mesh by step c, obtains ingredient；
Step d takes the foaming agent of corresponding parts by weight and foam stabilizer to be put into high speed agitator and is stirred foaming, then will match
Material is put into high speed agitator to be stirred together, and mixing speed is 2500~3000rpm, and mixing time is 40~70min, temperature control
120~150 DEG C are made as, slurry is obtained；
Step e, slurry is put into container, and is dried in an oven, and modified iron tailings masterbatch is obtained.
By using above-mentioned technical proposal, mixture is dried, keeps iron tailings masterbatch, feldspar and bentonite sufficient
It scatters, it is avoided to be sticked together between each other due to moisture, be conducive to screen it.Mixture after screening is existed
It is loaded in the high speed agitator of foaming agent and foam stabilizer, feldspar is a kind of good fluxing agent, and bentonite is a kind of good
Binder, and using the foam theory of foaming agent, make to obtain modified iron tailings masterbatch have inside it is good uniformly and mutually
Staggered aperture allows pitch to be filled in the inside of modified iron tailings masterbatch, improves the structural strength of colloid net entirety, makes to drip
The integral strength of green concrete greatly improves.
Further preferably, the bituminous concrete further includes the polypropylene fibre that parts by weight are 0.8~1.6 part.
By using above-mentioned technical proposal, polypropylene fibre has good intensity, elasticity and temperature tolerance, and chemically-resistant is rotten
Erosion.Polypropylene fibre can be penetrated partially in the aperture of modified iron tailings masterbatch, remaining polypropylene fibre can be intertwined, and with
Modified iron tailings masterbatch forms space network, and interlaced between space network and colloid net, improves pitch
Conjugation in concrete between each component, the structural strength for keeping it whole greatly enhance, are not susceptible to be broken.
Further preferably, the bituminous concrete further includes the polyethylene glycol that parts by weight are 0.6~1.3 part.
By using above-mentioned technical proposal, polyethylene glycol is a kind of good dispersing agent, is conducive to keep polypropylene fibre equal
Even spreads out, and polypropylene fibre is avoided to occur agglomerating phenomenon in bituminous concrete, and above-mentioned space network is made to exist
What is be distributed in bituminous concrete is more uniform, and is uniformly cross-linked with colloid net, improves the close of bituminous concrete entirety
Solidity has good promotion effect to its whole structural strength.
Further preferably, the cement is the asbestos of the talcum powder of powdery, agstone, dolomite dust or threadiness
Dandruff, wood-fibred.
By using above-mentioned technical proposal, cement be can be filled between modified basalt masterbatch, iron tailings and pitch
In gap, make bituminous concrete that there is good compactness, and cement has the viscosity of good Kazakhstan, can make in bituminous concrete
Stable between each component to be adhered to each other, the structural strength for keeping it whole is improved, and is not susceptible to be broken.
Further preferably, the anti-rut agent select RA anti-rut agent, road spy LT anti-rut agent, PR anti-rut agent or
Domix anti-rut agent.
By using above-mentioned technical proposal, anti-rut agent softens due to the effect of high temperature in the construction process, this is slightly
Grain thermoforming in roller compaction process increases the colloid net in bituminous concrete and three-dimensional framework effect, strengthens a group and divides it
Between interaction force, keep bituminous concrete more closely knit.Meanwhile the elastic component of anti-rut agent in higher temperature have make
The function that the deformed part elasticity on road surface is restored, thus so that bituminous concrete is not susceptible to deformation, and have good structure strong
Degree.
The purpose of the present invention two is to provide a kind of preparation process of bituminous concrete, be mixed using the pitch of this method preparation
Solidifying soil has good structural strength, and is not susceptible to be broken.
To achieve the above object two, the present invention provides the following technical scheme that
A kind of preparation process of bituminous concrete, which comprises the following steps:
The basalt masterbatch of corresponding parts by weight is stirred drying in drying bucket by step 1, and temperature controls 110~
120 DEG C, the time is 80~150min, and mixing speed is 1500~2000rpm, obtains dry basalt masterbatch；
Step 2 sieves dry basalt masterbatch, obtain partial size be respectively 0~3mm, 3~5mm, 5~18mm it is profound
Military rock particle, and according to (2~3): (3~4): the weight fraction ratio of (5~6) is uniformly mixed, and miberal powder and iron tailings mother is added
Material, stirs evenly together, obtains basalt ingredient；
Step 3, basalt ingredient, cement, anti-rut agent and silicon carbide is put into mix carries out dry mixing in cylinder, and the time is 8~
10s, mixing speed are 1500~2000rpm；
The pitch of corresponding parts by weight is heated to 180~200 DEG C by step 4, is uniformly added and is mixed in cylinder in 30~50s,
And basalt ingredient and pitch are stirred, mixing speed is 1200~1500rpm；
Uniformly mixed basalt ingredient and pitch are discharged from mixing in cylinder, bituminous concrete can be obtained by step 5.
By using above-mentioned technical proposal, when basalt masterbatch is dried at high temperature, part basalt particle because heated
Uneven or stirring is acutely easy to happen fragmentation, re-starts screening and ingredient to the basalt masterbatch after drying, is conducive to make
Specification when basalt masterbatch keeps initial makes the total quality of bituminous concrete be guaranteed.In basalt masterbatch high-speed stirring
During mixing, pitch is evenly and rapidly added, is conducive to the mixing for making pitch Yu basalt ingredients, has bituminous concrete
There is uniform and stable internal structure, and there is good good structural strength.
Further, the step 2 specifically includes, and dry basalt masterbatch is carried out via electromagnet exclusion device
Magnetic impurity is removed, is then sieved again, obtains the basalt particle that partial size is respectively 0~3mm, 3~5mm, 5~18mm,
And according to (2~3): (3~4): the weight fraction ratio of (5~6) is uniformly mixed, and adds miberal powder and the stirring of iron tailings masterbatch is equal
It is even, obtain basalt ingredient.
By using above-mentioned technical proposal, the magnetic impurity that will contain in basalt masterbatch, such as iron oxide Fe2O3, pass through
Electromagnet adsorbs Screening Treatment, can not only reduce the impurity content in bituminous concrete, moreover it is possible to improve each group in bituminous concrete
/ bond strength, help to improve the structural strength of bituminous concrete entirety, and be not susceptible to be broken.
In conclusion compared with prior art, the invention has the following advantages:
(1) contain a large amount of silica and aluminium oxide in the present invention in iron tailings, there is good combination with basalt masterbatch
Property, make bituminous concrete that there is good intensity.Meanwhile basalt masterbatch, iron tailings and pitch support form good stabilization
Colloid net, and silicon carbide have good wear-resisting property and intensity, can be filled in the gap inside colloid net, make pitch
The structural strength of concrete greatly improves, and is not susceptible to be broken；
(2) optimize, basalt masterbatch is modified processing, keep it internal with criss-cross aperture, and be added poly- third
Alkene fiber, polypropylene fibre and modified iron tailings masterbatch form space network, and between space network and colloid net
It is interlaced, the conjugation in bituminous concrete between each component is improved, the structural strength for keeping it whole greatly enhances, and is not easy to send out
Raw fracture；
(3) optimize, dry basalt masterbatch is removed magnetic impurity via electromagnet exclusion device, can not only be reduced
Impurity content in bituminous concrete, moreover it is possible to improve the bond strength in bituminous concrete between each component, help to improve drip
The structural strength of green concrete entirety, and be not susceptible to be broken.
Specific embodiment
Below with reference to embodiment, the present invention will be described in detail.
Embodiment 1: a kind of bituminous concrete, each component and its corresponding parts by weight are as shown in table 1, and by walking as follows
Suddenly it prepares:
The basalt masterbatch of corresponding parts by weight is stirred drying by step 1 in drying bucket, and temperature is controlled at 120 DEG C,
Time is 150min, mixing speed 1500rpm, obtains dry basalt masterbatch；
Step 2 sieves dry basalt masterbatch, obtains the basalt particle that partial size is respectively 3mm, 5mm, 18mm,
And be uniformly mixed according to the weight fraction ratio of 2:3:5, and miberal powder and iron tailings masterbatch is added, it stirs evenly together, obtains the Black Warrior
Rock ingredient；
Step 3, basalt ingredient, talcum powder, RA anti-rut agent and silicon carbide is put into mix carries out dry mixing in cylinder, and the time is
10s, mixing speed 1500rpm；
The pitch of corresponding parts by weight is heated to 180 DEG C by step 4, is uniformly added and is mixed in cylinder in 50s, and to basalt
Ingredient and pitch are stirred, mixing speed 1200rpm；
Uniformly mixed basalt ingredient and pitch are discharged from mixing in cylinder, bituminous concrete can be obtained by step 5.
Embodiment 2-8: a kind of bituminous concrete, difference from example 1 is that, each component and its corresponding weight
Number is as shown in table 1.
Each component and its parts by weight in 1 embodiment 1-8 of table
Embodiment 9: a kind of bituminous concrete, difference from example 1 is that, the talcum powder in step 3 replaces with white clouds
Mountain flour.
Embodiment 10: a kind of bituminous concrete, difference from example 1 is that, the talcum powder replacement in step 3
For wood-fibred.
Embodiment 11: a kind of bituminous concrete, difference from example 1 is that, the RA anti-rut agent in step 3
Replace with PR anti-rut agent.
Embodiment 12: a kind of bituminous concrete, difference from example 1 is that, basalt masterbatch is distinguished by partial size
It is mixed for the basalt particle of 3mm, 5mm, 15mm according to the weight fraction ratio of 2:3:5.
Embodiment 13: a kind of bituminous concrete, the difference is that, iron tailings masterbatch is by the high silicon in Anshan with embodiment 12
Sections tailing, horse steel high alumina sections tailing and Handan Xing's high contents of calcium and magnesium sections tailing are the weight fraction ratio of 1:1:1 by ratio of weight and the number of copies
It mixes.
Embodiment 14: a kind of bituminous concrete, the difference is that, iron tailings masterbatch is by the high silicon in Anshan with embodiment 12
Sections tailing and horse steel high alumina sections tailing are that the weight fraction ratio of 1:1 mixes by ratio of weight and the number of copies.
Embodiment 15: a kind of bituminous concrete, the difference is that, iron tailings masterbatch is located in advance with embodiment 14
Reason, and the following steps are included:
Step a, takes the iron tailings masterbatch of corresponding parts by weight, and the feldspar of corresponding parts by weight is added and bentonite is mixed
Uniformly, mixing speed 400rpm, mixing time 40min, obtains mixture；
Step b, mixture is dried, and temperature control is at 100 DEG C, time 90min；
Mixture after drying is carried out ball milling, and carries out sieve material with the sieve of 300 mesh by step c, obtains ingredient；
Step d takes the foaming agent of corresponding parts by weight and foam stabilizer to be put into high speed agitator and is stirred foaming, then will match
Material is put into high speed agitator to be stirred together, mixing speed 2500rpm, mixing time 70min, and temperature control is 150 DEG C,
Obtain slurry；
Step e, slurry is put into container, and is dried in an oven, and modified iron tailings masterbatch is obtained.
Embodiment 16: a kind of bituminous concrete, the difference is that, step 3 specifically includes with embodiment 15, by phase
Answer parts by weight be 80 parts of basalt ingredient, 2.5 parts of talcum powder, 0.7 part of RA anti-rut agent, 1.8 parts of silicon carbide and
0.8 part of polypropylene fibre, which is put into mix, carries out dry mixing in cylinder, time 10s, mixing speed 1500rpm.
Embodiment 17: a kind of bituminous concrete, with embodiment 16 the difference is that, the parts by weight of polypropylene fibre
It is 1.2 parts.
Embodiment 18: a kind of bituminous concrete, with embodiment 16 the difference is that, the parts by weight of polypropylene fibre
It is 1.6 parts.
Embodiment 19: a kind of bituminous concrete, the difference is that, step 3 specifically includes with embodiment 18, by phase
Answer parts by weight be 80 parts of basalt ingredient, 2.5 parts of talcum powder, 0.7 part of RA anti-rut agent, 1.8 parts of silicon carbide,
0.8 part of polypropylene fibre and 0.6 part of polyethylene glycol, which are put into mix, carries out dry mixing in cylinder, time 10s, and mixing speed is
1500rpm。
Embodiment 20: a kind of bituminous concrete, the difference is that, the parts by weight of polyethylene glycol are with embodiment 19
0.9 part.
Embodiment 21: a kind of bituminous concrete, the difference is that, the parts by weight of polyethylene glycol are with embodiment 19
1.3 part.
Embodiment 22: a kind of bituminous concrete, the difference is that, step 2 specifically includes with embodiment 21, will do
Dry basalt masterbatch is removed magnetic impurity via electromagnet exclusion device, is then sieved again, and partial size difference is obtained
It for the basalt particle of 0~3mm, 3~5mm, 5~18mm, and is uniformly mixed according to the weight fraction ratio of 2:3:5, adds mine
Powder and iron tailings masterbatch stir evenly, and obtain basalt ingredient.
Comparative example 1: a kind of bituminous concrete, difference from example 1 is that, it is added without iron during the preparation process
Tailing.
Comparative example 2: a kind of bituminous concrete, difference from example 1 is that, it is added without glue during the preparation process
Connect agent.
Comparative example 3: a kind of bituminous concrete, difference from example 1 is that, it is added without iron during the preparation process
Tailing and cement.
Comparative example 4: a kind of bituminous concrete, difference from example 1 is that, it is added without carbon during the preparation process
SiClx.
Comparative example 5: a kind of bituminous concrete, difference from example 1 is that, it is added without iron during the preparation process
Tailing, cement and silicon carbide.
Test Marshall stability test
Test specimen: using the bituminous concrete obtained in embodiment 1-22 as test specimen 1-22, using in comparative example 1-5
The bituminous concrete of acquisition is as control sample 1-5.
Test method: Marshall stability is that the maximum that marshal piece is done when going to pot when Marshall stability test is answered
Power, flow valuve are corresponding deformations.In general may be considered with stability is big and deform it is small be preferred, illustrate mixture intensity compared with
It is high.Test specimen 1-22 and control sample 1-5 is made into standard sample according to GB/T25033-2010 " Recycled Asphalt Pavement ",
And test the Marshall stability of each standard sample.
Test result: the test result of test specimen 1-22 and control sample 1-5 are as shown in table 2.
The test result of table 2 test specimen 1-22 and control sample 1-5
As shown in Table 2, it can be obtained by the control of the test result of test specimen 1-22 and control sample 1-5, basalt masterbatch, iron tailings
Well stable colloid net is formd between pitch, and silicon carbide has good wear-resisting property and intensity, makes pitch coagulation
The Marshall stability of soil greatly improves, and is not susceptible to be broken.Modified basalt masterbatch, and after polypropylene fibre is added,
The structural strength of bituminous concrete can be made to greatly improve.Meanwhile different types of iron tailings being selected to be mixed, select particle
Basalt masterbatch of different sizes has good improvement effect to the structural strength of bituminous concrete.
Test two intensity tests
Test specimen: using the bituminous concrete obtained in embodiment 1-22 as test specimen 1-22, using in comparative example 1-5
The bituminous concrete of acquisition is as control sample 1-5.
Test method: by test specimen 1-22 and control sample 1-5, according to GB/T17671-1999, " strength of cement mortar is examined
Proved recipe method " production reference block using TYE-3000 computer full-automatic concrete pressure machine takes 0.5MPa/s~0.8MPa/s's
Loading velocity, the compression strength of measurement standard test block maintenance 1d, 7d and 28d.
Test result: the test result of test specimen 1-22 and control sample 1-5 are as shown in table 3.
The test result of table 3 test specimen 1-22 and control sample 1-5
As shown in Table 3, by test sample 1-22 and control sample 1-5 test result compare can obtain, basalt masterbatch, iron tailings and
Well stable colloid net is formd between pitch, and silicon carbide has good wear-resisting property and intensity, makes bituminous concrete
Compression strength be improved.Modified basalt masterbatch, and after polypropylene fibre is added, space network and colloid net
Between be staggered, the structural strength of bituminous concrete can be made to greatly improve.Meanwhile select different types of iron tailings into
Row mixing, the basalt masterbatch for selecting granular size different make each component in bituminous concrete have good conjugation, and
There is good improvement effect to its structural strength.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of bituminous concrete, which is characterized in that the component including following parts by weight:
70~80 parts of basalt masterbatch；
6~12 parts of pitch；
2~4 parts of miberal powder；
8~10 parts of iron tailings masterbatch；
1.5~2.5 parts of cement；
0.7~1.4 part of anti-rut agent；
1.1~1.8 parts of silicon carbide.
2. bituminous concrete according to claim 1, which is characterized in that the basalt masterbatch by partial size be respectively 0~
3mm, 3~5mm, 5~18mm basalt particle according to (2~3): (3~4): the weight fraction ratio of (5~6) mixes.
3. bituminous concrete according to claim 1, which is characterized in that the iron tailings masterbatch is by Anshan high-silicon type iron tail
It is mixed by any weight fraction ratio any two or three in mine, horse steel high alumina sections tailing and Handan Xing's high contents of calcium and magnesium sections tailing
It forms.
4. bituminous concrete according to claim 3, which is characterized in that the iron tailings masterbatch is pre-processed, and is wrapped
Include following steps:
Step a, takes the iron tailings masterbatch of corresponding parts by weight, and the feldspar of corresponding parts by weight is added and bentonite is mixed
Uniformly, mixing speed is 400~800rpm, and mixing time is 30~40min, obtains mixture；
Step b, mixture is dried, and at 80~100 DEG C, the time is 60~90min for temperature control；
Mixture after drying is carried out ball milling, and carries out sieve material with the sieve of 200~300 mesh by step c, obtains ingredient；
Step d takes the foaming agent of corresponding parts by weight and foam stabilizer to be put into high speed agitator and is stirred foaming, then will match
Material is put into high speed agitator to be stirred together, and mixing speed is 2500~3000rpm, and mixing time is 40~70min, temperature control
120~150 DEG C are made as, slurry is obtained；
Step e, slurry is put into container, and is dried in an oven, and modified iron tailings masterbatch is obtained.
5. bituminous concrete according to claim 4, which is characterized in that the bituminous concrete further includes that parts by weight are
0.8~1.6 part of polypropylene fibre.
6. bituminous concrete according to claim 1, which is characterized in that the bituminous concrete further includes that parts by weight are
0.6~1.3 part of polyethylene glycol.
7. bituminous concrete according to claim 1, which is characterized in that the cement is talcum powder, the lime of powdery
Asbestos dandruff, the wood-fibred of mountain flour, dolomite dust or threadiness.
8. bituminous concrete according to claim 1, which is characterized in that the anti-rut agent selects RA anti-rut agent, road
Special LT anti-rut agent, PR anti-rut agent or Domix anti-rut agent.
9. a kind of preparation process of bituminous concrete, which comprises the following steps:
The basalt masterbatch of corresponding parts by weight is stirred drying in drying bucket by step 1, and temperature controls 110~
120 DEG C, the time is 80~150min, and mixing speed is 1500~2000rpm, obtains dry basalt masterbatch；
Step 2 sieves dry basalt masterbatch, obtain partial size be respectively 0~3mm, 3~5mm, 5~18mm it is profound
Military rock particle, and according to (2~3): (3~4): the weight fraction ratio of (5~6) is uniformly mixed, and miberal powder and iron tailings mother is added
Material, stirs evenly together, obtains basalt ingredient；
Step 3, basalt ingredient, cement, anti-rut agent and silicon carbide is put into mix carries out dry mixing in cylinder, and the time is 8~
10s, mixing speed are 1500~2000rpm；
The pitch of corresponding parts by weight is heated to 180~200 DEG C by step 4, is uniformly added and is mixed in cylinder in 30~50s,
And basalt ingredient and pitch are stirred, mixing speed is 1200~1500rpm；
Uniformly mixed basalt ingredient and pitch are discharged from mixing in cylinder, bituminous concrete can be obtained by step 5.
10. the preparation process of bituminous concrete according to claim 9, which is characterized in that the step 2 specifically includes,
Dry basalt masterbatch is removed magnetic impurity via electromagnet exclusion device, is then sieved again, obtains partial size
The basalt particle of respectively 0~3mm, 3~5mm, 5~18mm, and according to (2~3): (3~4): the parts by weight of (5~6)
Than being uniformly mixed, adds miberal powder and iron tailings masterbatch stirs evenly, obtain basalt ingredient.
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