CN109553341A - A kind of steel slag asphalt concrete pavement material and preparation method thereof - Google Patents
A kind of steel slag asphalt concrete pavement material and preparation method thereof Download PDFInfo
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- CN109553341A CN109553341A CN201811061836.7A CN201811061836A CN109553341A CN 109553341 A CN109553341 A CN 109553341A CN 201811061836 A CN201811061836 A CN 201811061836A CN 109553341 A CN109553341 A CN 109553341A
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- steel slag
- parts
- asphalt concrete
- concrete pavement
- mixture
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/142—Steelmaking slags, converter slags
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The present invention relates to a kind of steel slag asphalt concrete pavement material, the raw material including following parts by weight: 4-7.5 parts of pitches, 3-6 parts of cement, 3-10 parts of miberal powders, 50-80 parts of coarse aggregates, 10-35 parts of fine aggregates；Containing the steel slag of 65-80% in the coarse aggregate, remaining is limestone gravel.The preparation method of the ground surface material: steel slag is screened by sieve pore, steel slag and limestone gravel are mixed thoroughly, coarse aggregate is obtained；Then it is mixed with fine aggregate, miberal powder, cement, obtains mixture；Pitch is heated to 165-175 DEG C, mixture is then added, after mixing to obtain the final product.Steel slag is used for urban road laying process by the present invention; part substitution is gathered materials; it can either solve the problems, such as building stones exhaustive exploitation; it preserves the ecological environment, and can turn waste into wealth, save the energy and resource; it is at low cost; raw material is easily purchased, easy to make, has good high-temperature stability, low-temperature cracking-resistance and good non-deformability using the road surface of material making of the present invention.
Description
Technical field
The present invention relates to a kind of steel slag asphalt concrete pavement materials and preparation method thereof, belong to building material technology neck
Domain.
Background technique
Steel slag is the waste residue generated during steel-making along with the casting of steel, is the by-product in steelmaking process
Product according to the difference of the steel-making type of furnace, and are divided into vessel slag, arc furnace slag and secondary smelting slag.Vessel slag is most common at present
Steel slag type is formed during oxygen-blown converter.Arc furnace slag is the steel slag smelted in electric arc furnaces.The raw material of electric furnace steel making are logical
Be often steel scrap, by electric arc heated, form crude steel by ironing phase, the heat of oxidation and reduction period, electroslag usually have intensity it is high,
The big and non-porous feature of density.Secondary smelting slag is the steel slag generated with the secondary smelting process of refining high quality steel, is
Make the crude steel of converter or electric furnace smelting to meet higher chemical component requirement, ladle furnace processing, vacuum need to be carried out to crude steel
Exhaust, aod or vacuum oxygen decarbonization) etc. processing, the usual calcium oxide content of the steel slag formed in the process is high, powder easy to break
Change.
The most element of content is Ca element in steel slag, this has biggish relationship, followed by Fe, Si and Mg with process for making
Element.Compared with natural stone, the constituent content feature of steel slag is that iron content is high, in addition, four kinds of oxygen, calcium, iron and silicon members
Plain atom number is than accounting for the 93.4% of total amount.The generation of steel slag is usually the 10%-15% of crude steel yield, and yield is very huge,
According to statistics, China's crude steel yield in 2014 is more than 800,000,000 tons, and bed drain purge is more than 80,000,000 tons.Initially, steel slag is taken as waste straight
It connects and abandons, a large amount of steel slag is piled into mountain, not only occupies large stretch of industry and agricultural land, but also cause to environment very big
Pollution.Therefore, how steel slag waste material is efficiently used, becomes domestic urgent problem.
On the other hand, the demand with country to communications and transportation constantly increases, and highway in China construction also enters quick hair
The period of exhibition.According to " 2016 year traffic carriers develop statistical report ", ended for the end of the year 2016, national total mileage of highway reaches
469.63 ten thousand kilometers, wherein highway total kilometrage has exceeded 13.1 ten thousand kilometers.Highway is praised from Beijing-to-Shijiazhuangs in 1988, Shen great Hu
Since being open to traffic, highway in China construction generallys use limestone as semi-rigid sub-base material and basalt as asphalt surface course material
Material, this traditional ground surface material is huge to resource and energy consumption, and there are also to be further improved for performance.Natural earth and stone material
Exploitation massif vegetation and farmland can be damaged, and seriously affected the environment on periphery.Traditional ground surface material is not
It can better adapt to the requirement of current sustainable development.For steel slag as a kind of industrial residue, physical and mechanical property and rolling are broken
Stone is closer to, and is a kind of potential excellent road-making material.It rationally utilizes the properties of steel slag and is applied in road engineering,
It can turn waste into wealth, economic benefit, social benefit and the environmental benefit having had are the square Zhan Fangxiang that steel slag high value utilizes,
With vast potential for future development.
Currently, domestic have the research that steel slag is used for road engineering.For example, what is had been reported that has: Wuhan Iron and Steel Plant steel slag stock ground
Highway, the road 2.42km of PORT OF TIANJIN two roadbed backfill squeeze become silted up, No. four road 5.93km of Tianjinxingang are filling roadbed, the Baoji-Chengdu Railway is multiple
Line river oil Station Project test section is filling roadbed etc., is all using steel slag as roadbed embankment material or steel slag as in mixture
Aggregate replace the rubble etc. in pavement mix.Although research is more early, technology is simultaneously immature, mainly since steel slag contains
Extremely expansive free calcium oxide and free oxidation magnesium make steel slag have unstability, therefore are easy to cause ground surface material high temperature
Stability and low-temperature cracking-resistance are poor.
Summary of the invention
It is an object of the invention to solve the deficiencies in the prior art, a kind of steel slag asphalt concrete pavement material is provided.
Another object of the present invention is to provide the preparation methods of above-mentioned steel slag asphalt concrete pavement material.
Technical solution
A kind of steel slag asphalt concrete pavement material, the raw material including following parts by weight: 4-7.5 parts of pitches, 3-6 parts of cement, 3-
10 parts of miberal powders, 50-80 parts of coarse aggregates, 10-35 parts of fine aggregates；Containing the steel slag of 65-80% in the coarse aggregate, remaining is lime
Rock rubble.
Further, the ground surface material includes 4.8-6.3 parts of pitches, 3.5-4.5 parts of cement, 3-10 parts of miberal powders, and 60-80 parts
Coarse aggregate, 12-29 parts of fine aggregates.
Further, the ground surface material further includes 0.3-0.5 parts of lignocellulosics.
Further, the pitch is SBS modified pitch.
Further, the cement is 42.5 grades of ordinary portland cements.
Further, the particle size range of the steel slag and limestone gravel is 2.36-16mm.
The preparation method of above-mentioned steel slag asphalt concrete pavement material:
(1) steel slag is screened by sieve pore, steel slag and limestone gravel is mixed thoroughly, coarse aggregate is obtained；
(2) coarse aggregate and fine aggregate, miberal powder, cement are mixed, obtains mixture；
(3) pitch is heated to 165-175 DEG C, then be added step (2) mixture, after mixing to get.
Beneficial effects of the present invention: steel slag is used for urban road laying process by the present invention, and part substitution is gathered materials, can either be solved
Building stones exhaustive exploitation problem, preserves the ecological environment, and can turn waste into wealth, and saves the energy and resource, and at low cost, raw material is easily purchased, system
Facilitate, there is good high-temperature stability, low-temperature cracking-resistance using the steel slag asphalt concrete road surface of material making of the present invention
And good non-deformability, there are significant economic results in society.
Specific embodiment
For a better understanding of the present invention, below with reference to the embodiment content that the present invention is furture elucidated, but it is of the invention
Content is not limited solely to the following examples.
Embodiment 1
A kind of steel slag asphalt concrete pavement material, the raw material including following parts by weight: 5.3 parts of SBS modified pitch, 4.5 parts
42.5 grades of ordinary portland cements, 10 parts of miberal powders, 78 parts of coarse aggregates, 12 parts of fine aggregates, 0.3 part of lignocellulosic；The rough set
In material containing 78% steel slag, remaining is limestone gravel, and the particle size range of steel slag and limestone gravel is 2.36-16mm.
The preparation method of above-mentioned steel slag asphalt concrete pavement material:
(1) steel slag is screened by sieve pore, steel slag and limestone gravel is mixed thoroughly, coarse aggregate is obtained；
(2) coarse aggregate and fine aggregate, miberal powder, cement are mixed, obtains mixture；
(3) pitch is heated to 165-175 DEG C, then be added step (2) mixture, after mixing to get.
Embodiment 2
A kind of steel slag asphalt concrete pavement material, the raw material including following parts by weight: 5.7 parts of SBS modified pitch, 4.8 parts
42.5 grades of ordinary portland cements, 3 parts of miberal powders, 69 parts of coarse aggregates, 28 parts of fine aggregates, 0.4 part of lignocellulosic；The coarse aggregate
In containing 66% steel slag, remaining is limestone gravel, and the particle size range of steel slag and limestone gravel is 2.36-16mm.
The preparation method of above-mentioned steel slag asphalt concrete pavement material:
(1) steel slag is screened by sieve pore, steel slag and limestone gravel is mixed thoroughly, coarse aggregate is obtained；
(2) coarse aggregate and fine aggregate, miberal powder, cement are mixed, obtains mixture；
(3) pitch is heated to 165-175 DEG C, then be added step (2) mixture, after mixing to get.
Comparative example 1
Coarse aggregate in ground surface material is changed to the basaltic broken stone that particle size range is 2.36-16mm, remaining is same with embodiment 1,
Obtain asphalt concrete pavement material.
Comparative example 2
Coarse aggregate in ground surface material is changed to the basaltic broken stone that particle size range is 2.36-16mm, remaining is same with embodiment 2,
Obtain asphalt concrete pavement material.
1. water stability is tested
The mode for using immersion Marshall test and indirect tensile test on frozen-thaw to combine is to determine mixture water stabilizing.It adopts respectively
Marshal piece is formed by typical compacting method with the ground surface material of embodiment 1-2 and comparative example 1-2, is subsequently placed in thermostatic water bath
Middle progress immersion Marshall test test, step are more simple；Indirect tensile test on frozen-thaw mainly includes following three processes: (1) true
The full water of sky；(2) freeze thawing；(3) influence of rainwater on road surface can be concentrated, and is further strengthened by high temperature bath, can be effective
The actual working environment of simulation bituminous pavement.Test result is shown in Tables 1 and 2:
The residual stability performance test results of 1 embodiment of table and comparative example ground surface material
The indirect tensile test on frozen-thaw result of 2 embodiment of table and comparative example ground surface material
It can be seen from Tables 1 and 2 the residual stability of the ground surface material of the embodiment of the present invention 1 and 2 be all satisfied specification >=
85% requirement, Ratio of split strength >=80%, sufficiently prove that above two mixture has certain anti-water damage ability, this
Illustrate the water stability of steel slag asphalt mixture compared to parabasalt mixture slightly advantage.
2. high-temperature stability is tested
The ground surface material of embodiment 1-2, comparative example 1-2 are subjected to track by T 0719-2011 " asphalt mixture in track test "
Test, test result are shown in Table 3:
The wheel tracking test result of 3 embodiment of table and comparative example ground surface material
As can be seen from Table 3, the dynamic stability of steel slag asphalt mixture (embodiment 1) of the invention is higher, mixed compared with plain asphalt
It closes material (comparative example 1) and improves 80.9%；And the mixture for 2 steel-slag mixture dynamic stability of embodiment compared with comparative example 2
Improve 75.2%.It is indicated above that steel slag asphalt mixture has certain advantage in terms of high-temperature stability.
3. low-temperature cracking-resistance is tested
According to standard method preparation and 1 mixture of excision forming embodiment, 1 mixture of comparative example, 2 mixture of embodiment and
The girder test specimen of 2 mixture of comparative example, each type mixture is respectively provided with 8 parallel test specimens, using girder bend test side
Method, and using mechanics parameters such as failure strains with the crack resistance at low-temperature of Comprehensive Evaluation steel-slag mixture, test temperature is -10
DEG C, load uses UTM experimental machine.Specific test result is shown in Table 4:
The girder bend test result of 4 embodiment of table and comparative example mixture
As can be seen from Table 4, asphalt constantly increases with stiffness modulus, and failure strain is in downward trend.Embodiment
The failure strain of 1 mixture improves 11.7% compared with comparative example 1, and 2 mixture failure strain of embodiment is improved compared with comparative example 2
3.9%.On the whole, the introducing of steel slag improves mixture low-temperature bending performance, and reason is the caking property of steel slag and pitch
It is stronger, and the introducing of steel slag causes asphalt content to increase.
4. anti-shear performance is tested
Direct shear test effectively simulation bituminous pavement upper layer actual loading (pure shear stress) situation, test can use straight
Instrument is cut to be tested.
Experimental condition: load loading speed is about 1mm/min；It is 20 DEG C and 60 DEG C that temperature, which is respectively adopted, and test specimen is in control cabinet
Keep the temperature 6h, the shearing strength using the magnitude of maximum shearing stress of direct shear test as test specimen.To ensure the accurate of this test data
Property, under the conditions of same temperature, 1 mixture of embodiment, 1 mixture of comparative example, 2 mixture of embodiment and comparative example 2 are mixed
Material prepares six test specimens respectively and does parallel test.Specific test data is shown in Table 5:
The shear test data of 5 embodiment of table and comparative example mixture
As can be seen from Table 5, the incorporation of steel slag improves the anti-shear ability of asphalt to a certain extent, different
Under the conditions of temperature (20 DEG C and 60 DEG C), the more common mixture of the maximum shear stress typical value of Examples 1 and 2 mixture has small
Amplitude is promoted, comprehensive to show that steel slag asphalt mixture has good non-deformability.
5. application test
Respectively with the rapid improvement project of Nanjing Yangtze River tunnel north of the Changjiang River connecting line, 328 national highway Yong Zhuanzhi dragon ponds section reorganization and expansion work
Journey is to rely on engineering, with assay steel slag asphalt road surface application effect.
(1) the rapid improvement project of Nanjing Yangzi river tunnel north of the Changjiang River connecting line
Our company is in 2017 in the left width main line K2+030 ~ K2 of the rapid improvement project of Nanjing Yangtze River tunnel north of the Changjiang River connecting line
(the site operation stage paves side by side using 2 pavers, paves for+305 makings steel slag asphalt concrete road surface of embodiment 1
Speed is controlled substantially in 2.0 ~ 2.5m/min).After making completes test section, compactness, infiltration, coefficient of friction, construction have been carried out
The Indexs measures such as depth, indices are all satisfied associated specifications.
In addition, the integral status on upper layer road surface is preferable, and service performance is good by the tracking observation to traffic counts,
At present without diseases such as tracks.By FWD deflection testing, show that the steel slag asphalt concrete road surface structure layer of embodiment 1 is more common
Asphalt concrete pavement has higher total bearing capacity and non-deformability.
Through comprehensively measuring and calculating, 1 mixture of embodiment per ton saves 127.34 yuan of construction costs compared with 1 mixture of comparative example, tool
There is good economic benefit.
(2) 328 national highway Yong Zhuanzhi dragon ponds section reconstruction and extension project
Our company is in 2017 in 328 national highway Yong Zhuanzhi dragon ponds section reconstruction and extension project K30+700 ~ K31+500 making embodiment 2
Steel slag asphalt concrete pavement material (the site operation stage is paved side by side using 2 SUPER 1800-2 pavers, is paved
Speed control is in 1.5 ~ 2.5m/min).After making completes test section, compactness, infiltration, coefficient of friction, construction depth have been carried out
Equal Indexs measures, indices are all satisfied associated specifications.
In October, 2017 tracking observation is carried out to the road surface, the integral status on upper layer road surface is preferable, at present without obvious disease
Evil.The detection of dynamic modulus and flexure is also carried out to steel slag SUP-13 bituminous pavement simultaneously, steel slag asphalt road surface is dynamic
Morphotype amount is above 3500MPa, and structure sheaf has good bearing capacity.
Through comprehensively measuring and calculating, 2 mixture of embodiment per ton saves 122.76 yuan compared with 2 mixture of common control's example and is constructed into
This, has significant economic benefit.
Claims (7)
1. a kind of steel slag asphalt concrete pavement material, which is characterized in that the raw material including following parts by weight: 4-7.5 parts of pitches,
3-6 parts of cement, 3-10 parts of miberal powders, 50-80 parts of coarse aggregates, 10-35 parts of fine aggregates；Contain the steel of 65-80% in the coarse aggregate
Slag, remaining is limestone gravel.
2. steel slag asphalt concrete pavement material as described in claim 1, which is characterized in that the ground surface material includes 4.8-
6.3 parts of pitches, 3.5-4.5 parts of cement, 3-10 parts of miberal powders, 60-80 parts of coarse aggregates, 12-29 parts of fine aggregates.
3. steel slag asphalt concrete pavement material described in requiring 1, which is characterized in that the ground surface material further includes 0.3-0.5
Part lignocellulosic.
4. steel slag asphalt concrete pavement material as described in claim 1, which is characterized in that the pitch is the modified drip of SBS
It is green.
5. steel slag asphalt concrete pavement material as described in claim 1, which is characterized in that the cement is 42.5 grades common
Portland cement.
6. such as steel slag asphalt concrete pavement material described in any one of claim 1 to 5, which is characterized in that the steel slag and
The particle size range of limestone gravel is 2.36-16mm.
7. such as the preparation method of steel slag asphalt concrete pavement material as claimed in any one of claims 1 to 6, which is characterized in that
Include the following steps:
(1) steel slag is screened by sieve pore, steel slag and limestone gravel is mixed thoroughly, coarse aggregate is obtained；
(2) coarse aggregate and fine aggregate, miberal powder, cement are mixed, obtains mixture；
(3) pitch is heated to 165-175 DEG C, then be added step (2) mixture, after mixing to get.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811061836.7A CN109553341A (en) | 2018-09-12 | 2018-09-12 | A kind of steel slag asphalt concrete pavement material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811061836.7A CN109553341A (en) | 2018-09-12 | 2018-09-12 | A kind of steel slag asphalt concrete pavement material and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111153633A (en) * | 2020-01-09 | 2020-05-15 | 江苏中新苏通市政工程有限公司 | Anti-cracking asphalt concrete and preparation process thereof |
| CN111285637A (en) * | 2020-03-30 | 2020-06-16 | 中南大学 | Open-graded wearing layer asphalt mixture and preparation method thereof |
| CN111393108A (en) * | 2020-03-27 | 2020-07-10 | 江苏东交智控科技集团股份有限公司 | Environment-friendly cement-stabilized macadam and application thereof |
| CN111472236A (en) * | 2020-04-10 | 2020-07-31 | 南京林业大学 | Porous slag asphalt mixture and mix proportion design method thereof |
| CN111548076A (en) * | 2020-06-23 | 2020-08-18 | 杨琼 | Steel slag asphalt concrete with good anti-rutting performance and preparation method thereof |
| CN113772999A (en) * | 2021-08-31 | 2021-12-10 | 武汉理工大学 | Asphalt filler and preparation method thereof |
-
2018
- 2018-09-12 CN CN201811061836.7A patent/CN109553341A/en active Pending
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| 庹峻玮: "钢渣碎石沥青混合料路用性能研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111153633A (en) * | 2020-01-09 | 2020-05-15 | 江苏中新苏通市政工程有限公司 | Anti-cracking asphalt concrete and preparation process thereof |
| CN111393108A (en) * | 2020-03-27 | 2020-07-10 | 江苏东交智控科技集团股份有限公司 | Environment-friendly cement-stabilized macadam and application thereof |
| CN111393108B (en) * | 2020-03-27 | 2021-06-15 | 江苏东交智控科技集团股份有限公司 | Environment-friendly cement-stabilized macadam and application thereof |
| CN111285637A (en) * | 2020-03-30 | 2020-06-16 | 中南大学 | Open-graded wearing layer asphalt mixture and preparation method thereof |
| CN111285637B (en) * | 2020-03-30 | 2021-12-14 | 中南大学 | Open-graded wearing layer asphalt mixture and preparation method thereof |
| CN111472236A (en) * | 2020-04-10 | 2020-07-31 | 南京林业大学 | Porous slag asphalt mixture and mix proportion design method thereof |
| CN111472236B (en) * | 2020-04-10 | 2021-12-21 | 南京林业大学 | Porous slag asphalt mixture and mix proportion design method thereof |
| CN111548076A (en) * | 2020-06-23 | 2020-08-18 | 杨琼 | Steel slag asphalt concrete with good anti-rutting performance and preparation method thereof |
| CN113772999A (en) * | 2021-08-31 | 2021-12-10 | 武汉理工大学 | Asphalt filler and preparation method thereof |
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Application publication date: 20190402 |
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