CN110104996A - A kind of high-durability steel slag asphalt concrete pavement material and preparation method - Google Patents
A kind of high-durability steel slag asphalt concrete pavement material and preparation method Download PDFInfo
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- CN110104996A CN110104996A CN201910532719.2A CN201910532719A CN110104996A CN 110104996 A CN110104996 A CN 110104996A CN 201910532719 A CN201910532719 A CN 201910532719A CN 110104996 A CN110104996 A CN 110104996A
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- steel slag
- parts
- asphalt concrete
- concrete pavement
- pitch
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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
- 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
-
- 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
- C04B2111/00017—Aspects relating to the protection of the environment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The present invention relates to a kind of high-durability steel slag asphalt concrete pavement material and preparation methods, which is characterized in that by weight, including 10 ~ 20 parts of pitch, coarse aggregate are 40 ~ 80 parts, and fine aggregate is 10 ~ 20 parts, 2 ~ 10 parts of filler, 5 ~ 10 parts of phase-change material.The addition of phase-change material can ensure that mixture temperature meets construction requirement; it prevents from generating segregation phenomenon in construction; the asphalt prepared after being surface-treated simultaneously to steel slag coarse aggregate; the features such as showing high-durability, high anti-water damage; the effective use for not only realizing solid waste, also solves Study of Volume Expansion of traditional steel slag asphalt concrete for road engineering.
Description
Technical field
The present invention relates to building material technical fields, it is more particularly related to a kind of high-durability steel slag asphalt
Concrete pavement material and preparation method.
Background technique
Steel slag is the waste residue being discharged in steelmaking process, mainly by slag making materials, smelt reactant, corrode fall off furnace body, mend
Composite solid solution composed by impurity that furnace material, metal charge are brought into and the slag making materials being added for adjustment steel slag property.
1 ton of crude steel of every production, there are about 0.15~0.2 ton of steel slags to be discharged.As steel big producer, steel slag annual output is very huge in China
Greatly, but resource utilization rate is less than 30%.A lot of steel slag is stacked naturally to be caused serious environmental pollution, and resource is also created
Waste.
On the one hand, the physical and mechanical property of steel slag also has good wear-resisting, non-skid property, anti-vehicle comparable to natural aggregate
Rut can satisfy the related requirement of pavement material completely.Steel slag is used as to gather materials and prepares asphalt, is Comprehensive Utilization of Steel Slag
The important channel utilized.
There are about 50% steel slags to be used for road construction in Europe at present, is even as high as 98% in this ratio of Britain, and China uses
In road construction steel slag also less than 2%, from developed country, also there is a big difference.
On the other hand, due in steel slag f-CaO content it is higher, up to 5%~10%.These free calcium oxide aquations form hydrogen
Volume can increase 1~2 times during calcium oxide, easily cause steel slag dusting expand, steel slag in terms of stability there are the problem of,
The construction material performance especially volume stability containing steel slag is set to increase bad hidden danger, this has obtained body in engineer application
Existing, the road surface and building structure that the engineering steel slag aggregate largely reported is done are expanded out in various degree using several Nian Houjun
Split phenomenon.
It is anti-that the method that nature ageing is generallyd use in engineer application makes the free calcium oxide in steel slag that aquation occur completely
It answers, mainly there is immersion and sprinkling to be exposed to the sun two kinds of techniques of circular treatment.But usually time-consuming for this 2 kinds of methods, can also occupy a large amount of
Place is stacked, it is totally unfavorable to the resource utilization of steel slag.In order to solve the problems, such as steel slag utilization, the patent No.
CN201811061836.7 discloses a kind of steel slag asphalt concrete pavement material and preparation method thereof, this method not to steel slag into
Row is effectively treated, and is easy to cause the inhomogeneities of steel slag itself that can generate segregation phenomenon in the construction process, to influence drip
The appearance and military service performance of green concrete road surface, only part is replaced with steel slag in coarse aggregate described in another aspect, remaining is
Limestone gravel.
Summary of the invention
In view of the deficiencies of the prior art, the present invention proposes a kind of high-durability steel slag asphalt concrete pavement material and preparation
On the one hand method can not only make road surface have good high temperature performance, moreover it is possible to improve steel slag by the pretreatment to steel slag
The anti-water damage property of bituminous concrete, the addition of still further aspect phase-change material can satisfy construction temperature in asphalt
It is required that preventing steel slag from occurring segregation phenomenon in the construction process.
In order to solve the above-mentioned technical problem, technical scheme is as follows:
A kind of high-durability steel slag asphalt concrete pavement material and preparation method, by weight, including 10 ~ 20 parts of pitch,
Steel slag coarse aggregate is 40 ~ 80 parts, and fine aggregate is 10 ~ 20 parts, 2 ~ 10 parts of filler, 5 ~ 10 parts of phase-change material；
Preferably, the high-durability steel slag asphalt concrete pavement material, by weight, including 10 ~ 15 parts of pitch, steel
Slag coarse aggregate is 40 ~ 70 parts, and fine aggregate is 10 ~ 15 parts, 2 ~ 8 parts of filler, 5 ~ 8 parts of phase-change material；
Preferably, the high-durability steel slag asphalt concrete pavement material, by weight, including 15 parts of pitch, steel slag
Coarse aggregate is 70 parts, and fine aggregate is 15 parts, 5 parts of filler, 6 parts of phase-change material；
Preferably, the coarse aggregate is steel slag, and particle size range is 2.36 ~ 16mm.
Further, the inorganic agent that gathers materials is water-and oil-repellent, and effective component is organic siliconresin.The phase transformation material
Material is or mixtures thereof palmitinic acid, lauric acid, polyethylene glycol.
Preferably, the pitch is 70#Matrix pitch.
Above-mentioned high-durability steel slag asphalt concrete pavement material, includes the following steps:
S1, steel slag is selected into slag as aggregate by sieve pore, be then placed in water-and oil-repellent after impregnating 10 ~ 30min at room temperature
24 ~ 48h is conserved, pulls out, after draining, obtains hydrophobicity steel slag；
S2, each component is weighed according to parts by weight, and coarse aggregate is uniformly mixed with fine aggregate, filler and phase-change material and is stirred to get
Mixture；
S3,70# matrix pitch is heated to melt-flow state, and controlling addition temperature is 165 ~ 175 DEG C, is then added to S2
In mixture, after being mixed evenly, both.
Organic siliconresin, microstructure show as network structure made of being crosslinked as silicon oxygen bond, are other non-on side chain
Polar group shows very strong repellency to the very strong hydrone of polarity, thus has hydrophobicity.Water-and oil-repellent impregnates steel
Slag can make steel slag surface form the film of one layer of waterproof, and influence of this tunic to steel slag partial size is smaller, but can prevent outside moisture
It enters inside steel slag, is reacted so that moisture be avoided to enter inside steel slag with the f-CaO inside steel slag, and then improve steel slag drip
The stability of green concrete.Water-and oil-repellent forms film to other physical properties of steel slag almost without shadow on steel slag surface
It rings, and this layer film property is stablized, can preferably resist the height during extraneous mechanical wear and asphalt are mixed and stirred
Warm environment, and still maintained during the military service of steel slag asphalt concrete and stablize and play a role.
Contain a large amount of metallic elements in steel slag, so that the heating conduction of steel slag is fine, in steel slag asphalt
Concrete is mixed and stirred, is transported, paving with heat transfer in roller compaction process quickly, and temperature also can be reduced quickly, be easy to cause construction
Not enough to influence construction quality, phase-change material is just generated when pitch is heated to fusion temperature from solid the relatively low compactness of temperature
State is to the phase transformation of liquid, and during fusing, phase-change material absorbs and stores a large amount of latent heat, and upon a drop in temperature, release is latent
Heat makes mixture temperature meet construction requirement.
Compared with prior art, beneficial effects of the present invention:
1, improve the anti-water damage property of steel slag asphalt concrete, reduce steel slag water absorption rate, prevent road surface swelling cracking；
2, the addition of phase-change material can ensure that mixture temperature meets construction requirement, prevent from generating segregation phenomenon in construction；
3, ground surface material is prepared using steel slag aggregate and greatly reduces the pollution that the bulk deposition of steel slag generates, can reduce cost,
With preferable market application prospect.
Specific embodiment
Below with reference to embodiment, the present invention will be described in detail.It should be noted that in the absence of conflict, the present invention
In embodiment and embodiment in feature can be combined with each other.
Embodiment 1
In the present embodiment, the technical solution of high-durability steel slag asphalt concrete pavement material preparation method is:
High-durability steel slag asphalt concrete pavement material, by weight, comprising: 70#15 parts of matrix pitch, steel slag coarse aggregate
It is 70 parts, fine aggregate is 15 parts, 5 parts of filler, 6 parts of phase-change material；
High-durability steel slag asphalt concrete pavement material the preparation method is as follows:
S1, steel slag is selected into slag as aggregate by sieve pore, is then placed on after impregnating 20min in water-and oil-repellent and conserves at room temperature
48h is pulled out, after draining, obtains hydrophobicity steel slag；
S2, each component is weighed according to parts by weight, and coarse aggregate is uniformly mixed with fine aggregate, filler and phase-change material and is stirred to get
Mixture；
S3,70# matrix pitch is heated to melt-flow state, and controlling addition temperature is 170 DEG C, is then added to S2 mixing
In material, after being mixed evenly, both.
Embodiment 2
In the present embodiment, the technical solution of high-durability steel slag asphalt concrete pavement material preparation method is:
High-durability steel slag asphalt concrete pavement material, by weight, comprising: 70#15 parts of matrix pitch, steel slag coarse aggregate
It is 65 parts, fine aggregate is 15 parts, 8 parts of filler, 6 parts of phase-change material；
High-durability steel slag asphalt concrete pavement material preparation method is the same as above-described embodiment 1.
Comparative example 1
Immersion treatment is not carried out to steel slag, saves S1 step；
In this comparative example, the technical solution of steel slag asphalt concrete pavement material preparation method is:
Steel slag asphalt concrete pavement material, by weight, comprising: 70#15 parts of matrix pitch, steel slag coarse aggregate are 70 parts,
Fine aggregate is 15 parts, 5 parts of filler；
Steel slag asphalt concrete pavement material preparation method: with step S2 and S3 in above-described embodiment 1.
Comparative example 2
Coarse aggregate is changed to the limestone gravel of 2.36 ~ 16mm；
In this comparative example, the technical solution of limestone asphalt concrete pavement material preparation method is:
Limestone asphalt concrete pavement material, by weight, comprising: 70#15 parts of matrix pitch, limestone coarse aggregate are 70
Part, fine aggregate is 15 parts, 5 parts of filler；
Limestone asphalt concrete pavement material preparation method: with step S2 and S3 in above-described embodiment 1.
Test result is as follows:
1. high-temperature stability is examined
According to " highway engineering pitch and asphalt Experimental Procedures (E20-2011 JTG) ", evaluated using wheel tracking test high
Temperature stability.Wheel tracking test forms the board-like test specimen of bituminous concrete using standard rolling method, in defined test temperature and wheel
Under the conditions of stone roller, rolling wheel back and forth rolls rolling along surface of test piece identical strip path curve, and measurement surface of test piece takes turns repeated action in test
The rutting depth formed in lower.Wherein, gradation is gathered materials in satisfaction " standard specification for construction and acceptance of highway asphalt pavement " JTG F40-2017
The requirement of AC-13 gradation.
1 bituminous concrete wheel tracking test result of table
2. low-temperature cracking-resistance is examined
In order to evaluate the low-temperature cracking-resistance of bituminous concrete, low temperature bend test is carried out according to current specifications.Warm bend test
At -10 DEG C, with the rate of 50mm/min, load is applied to rupture failure, meter to asphalt girder test specimen span centre
Calculate the destruction flexural tensile stress strain of asphalt.
2 bituminous concrete bend test result of table
3. dilatancy is examined
In order to test influence of the volume expansion to performance when steel slag gathers materials as bituminous concrete, according to " highway engineering is gathered materials examination
Test regulation (E42-2005 JTG) " carry out steel slag expansion test.3 standard marshal pieces are made first, use vernier caliper
Initial volume is calculated in the diameter of test specimen and height before test is soaked, then test specimen is immersed in 60 DEG C ± 1 DEG C of thermostatted water
72h in case takes out measurement diameter, highly to volume after being impregnated, finally calculating steel slag asphalt concrete expansion rate later.
3 bituminous concrete swelling rate test result of table
4. water stability is examined
According to " highway engineering pitch and asphalt Experimental Procedures (E20-2011 JTG) ", examined using indirect tensile test on frozen-thaw
Test the water stability of bituminous concrete.Indirect tensile test on frozen-thaw is suitable for carrying out freeze thawing to bituminous concrete under prescribed conditions following
Ring measures the intensity ratio of concrete sample cleavage fracture before and after by Moisture Damage, further evaluates bituminous concrete with this
Water stability.
4 bituminous concrete Ratio of split strength test result of table
In conclusion in conjunction with test result in table 1 to 4 it is found that being better than limestone concrete using steel slag concrete effect, not only
Meet high temperature performance, moreover it is possible to improve the water stability of bituminous concrete and reduce steel slag being used for swelling generation in road surface,
In embodiment 1 by water-and oil-repellent impregnate and phase-change material addition after steel slag asphalt concrete freeze-thaw split intensity ratio
93.5% improves 11.7% compared to steel slag untreated in comparative example 1, side light water-and oil-repellent film energy effective protection steel
Slag aggregate is not damaged by outside moisture, and moisture reduces the destruction of asphalt concrete structure in frozen-thaw process.Using leaching
The steel slag of bubble before and after the processing prepares steel slag asphalt mixture as gathering materials, and untreated steel slag particle surface is wrapped up in comparative example 1
It is covered with one layer of dust, these dust can fall off at any time during the production of steel slag, transport, use, can be to the performance of steel slag
A degree of influence is caused, while phase-change material is not added causes construction temperature decline to become faster, compactness is inadequate, causes to mix
Expect segregation phenomenon；There is cleaning function to steel slag surface using water-and oil-repellent immersion in embodiment 1, steel slag stability that treated
It is substantially improved, stability is good.By changing the optimum adding quantity of pulverized of steel slag, embodiment 2 also can satisfy requirement, and effect is worse than implementation
Example 1.Steel slag asphalt expansion capacity of concrete is more than to show that steel slag stability is bad 1% as defined in specification in comparative example 1, can be because of body
The stability on product expansion effects road surface.
Steel slag asphalt concrete water stability is good to have good adhesiveness mainly due to steel slag and pitch.Steel slag belongs to
Alkali aggregate can seemingly with lime rock react with the acid anhydrides in pitch, enhance the adhesive attraction between asphaltaggregate；Together
When steel slag coarse, porous structure facilitate adsorptive pitch, so that the adhesiveness of steel slag and pitch is better than limestone in comparative example 2
Adhesiveness.
The content that above-described embodiment illustrates should be understood as that these embodiments are only used for being illustrated more clearly that the present invention, without
For limiting the scope of the invention, after the present invention has been read, those skilled in the art are to various equivalent forms of the invention
Modification each fall within the application range as defined in the appended claims.
Claims (8)
1. a kind of high-durability steel slag asphalt concrete pavement material and preparation method, which is characterized in that by weight, including
10 ~ 20 parts of pitch, coarse aggregate are 40 ~ 80 parts, and fine aggregate is 10 ~ 20 parts, 2 ~ 10 parts of filler, 5 ~ 10 parts of phase-change material.
2. high-durability steel slag asphalt concrete pavement material according to claim 1, which is characterized in that by weight
Meter, including 10 ~ 15 parts of pitch, coarse aggregate are 40 ~ 70 parts, and fine aggregate is 10 ~ 15 parts, 2 ~ 8 parts of filler, 5 ~ 8 parts of phase-change material.
3. high-durability steel slag asphalt concrete pavement material according to claim 1, which is characterized in that by weight
Meter, including 15 parts of pitch, coarse aggregate are 70 parts, and fine aggregate is 15 parts, 5 parts of filler, 6 parts of phase-change material.
4. high-durability steel slag asphalt concrete pavement material according to claim 1, which is characterized in that the place that gathers materials
Reason agent is water-and oil-repellent, and effective component is organic siliconresin.
5. high-durability steel slag asphalt concrete pavement material according to claim 1, which is characterized in that the pitch is
70#One of matrix pitch, SBS modified pitch.
6. high-durability steel slag asphalt concrete pavement material according to claim 1, which is characterized in that the coarse aggregate
For steel slag, particle size range is 2.36 ~ 16mm.
7. high-durability steel slag asphalt concrete pavement material according to claim 1, which is characterized in that the phase transformation material
Material is or mixtures thereof palmitinic acid, lauric acid, polyethylene glycol.
8. such as the described in any item high-durability steel slag asphalt concrete pavement materials of claim 1-7, which is characterized in that including
Following steps:
S1, steel slag is selected into slag as aggregate by sieve pore, be then placed in water-and oil-repellent after impregnating 10 ~ 30min at room temperature
24 ~ 48h is conserved, pulls out, after draining, obtains hydrophobicity steel slag；
S2, each component is weighed according to parts by weight, and coarse aggregate is uniformly mixed with fine aggregate, filler and phase-change material and is stirred to get
Mixture；
S3, pitch is heated to melt-flow state, and controlling addition temperature is 165 ~ 175 DEG C, is then added to S2 mixture
In, after being mixed evenly, both.
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Cited By (5)
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| CN112624668A (en) * | 2020-12-31 | 2021-04-09 | 武汉理工大学 | Antiskid and anti-icing-nighttime visible asphalt pavement material and preparation method thereof |
| CN113213816A (en) * | 2021-05-22 | 2021-08-06 | 山东高速工程建设集团有限公司 | Low-activity steel slag asphalt mixture and preparation method thereof |
| CN113979672A (en) * | 2021-11-24 | 2022-01-28 | 华中科技大学 | Steel slag-based phase-change asphalt concrete capable of melting snow and removing ice and preparation method thereof |
| CN114835439A (en) * | 2022-06-02 | 2022-08-02 | 黄卫 | Epoxy asphalt steel slag concrete ultrathin wearing layer and preparation method thereof |
| CN115321883A (en) * | 2022-08-29 | 2022-11-11 | 聊城市交通发展有限公司 | Steel slag SMA asphalt concrete and intersection rut rapid disposal structure |
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| CN112624668A (en) * | 2020-12-31 | 2021-04-09 | 武汉理工大学 | Antiskid and anti-icing-nighttime visible asphalt pavement material and preparation method thereof |
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| CN113979672A (en) * | 2021-11-24 | 2022-01-28 | 华中科技大学 | Steel slag-based phase-change asphalt concrete capable of melting snow and removing ice and preparation method thereof |
| CN114835439A (en) * | 2022-06-02 | 2022-08-02 | 黄卫 | Epoxy asphalt steel slag concrete ultrathin wearing layer and preparation method thereof |
| CN115321883A (en) * | 2022-08-29 | 2022-11-11 | 聊城市交通发展有限公司 | Steel slag SMA asphalt concrete and intersection rut rapid disposal structure |
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Application publication date: 20190809 |