CN1369453A - Asphalt-mastic-broken stone mixture using steel slag as coarse aggregate and its application - Google Patents

Asphalt-mastic-broken stone mixture using steel slag as coarse aggregate and its application Download PDF

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Publication number
CN1369453A
CN1369453A CN02116245A CN02116245A CN1369453A CN 1369453 A CN1369453 A CN 1369453A CN 02116245 A CN02116245 A CN 02116245A CN 02116245 A CN02116245 A CN 02116245A CN 1369453 A CN1369453 A CN 1369453A
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CN
China
Prior art keywords
slag
aggregate
compound
asphalt
coarse aggregate
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CN02116245A
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Chinese (zh)
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CN1182064C (en
Inventor
杨丽英
柳浩�
王建国
李宝生
完宇培
郝文启
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北京市公路局公路设计研究院
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Priority to CNB02116245XA priority Critical patent/CN1182064C/en
Publication of CN1369453A publication Critical patent/CN1369453A/en
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02Macromolecular compounds
    • C04B26/26Bituminous materials, e.g. tar, pitch
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0075Uses not provided for elsewhere in C04B2111/00 for road construction
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

An asphalt-mastic-broken stone mixture used for pavement of highway and street is prepared from steel slags, machined sand, powdered ore, lignofibres as stabilizer and asphalt as cementing agent through proportional mixing. Its advantages are high mechanical performance long service life and reducing environmental pollution.

Description

Stone mastic asphalt and application thereof with steel slag as coarse aggregate
Technical field
The present invention relates to a kind of stone mastic asphalt, especially a kind of stone mastic asphalt with steel slag as coarse aggregate belongs to the technical field that asphalt is applied to highway pavement and slag recycling.The invention still further relates to the application of described stone mastic asphalt.
Background technology
Highway in China road surface layer generally adopts asphalt (AC).In recent years, in the high-grade highway upper layer, bring into use stone mastic asphalt (SMA).Stone mastic asphalt is to be extruded into skeleton by the embedding of gap grading coarse aggregate, the bitumastic filling skeleton gap that forms by pitch, fiber stabilizer, breeze and a small amount of fine aggregate and a kind of compound of forming, belong to a kind of closely knit-skeleton structure.Because stone mastic asphalt has remarkable characteristics such as anti-rut, cling property, bleeding and weather resistance, thereby becomes the ideal structure form of high grade highway pavement upper layer in recent years.The characteristics of stone mastic asphalt are: content of coarse aggregate height, asphaltic binder and breeze content height.Content of coarse aggregate accounts for more than 70%, and the mutual embedding of coarse aggregate to squeeze be the prerequisite that compound has good high-temperature stability, sliding resistance, thereby the quality of coarse aggregate is most important to the performance impact of stone mastic asphalt.This class compound require coarse aggregate tough and tensile, coarse, wear-resisting, corner angle are arranged and have good adhesivity with pitch.Using more coarse aggregate at present mainly is basalt and diabase, and these two classes building stones can satisfy the technical requirements of stone mastic asphalt to coarse aggregate.
But, along with the continuous expansion of highway in China construction scale, the demand of building stones being increased day by day, existing reserves can not satisfy the demands, and many geographic building stones can not satisfy the needs of road construction, thereby have greatly restricted the development of highway.Remote outward transport building stones make that again material cost increases, thereby highway construction cost is improved.And, the large scale mining building stones again havoc ecotope, the indirect loss that causes can't be retrieved.
Goal of the invention
The objective of the invention is to adopt the industrial waste of steelworks---slag replaces basalt and as the coarse aggregate of asphalt, a kind of stone mastic asphalt with steel slag as coarse aggregate is provided, to be used for the highway pavement upper layer, improve the road and use the life-span, reduce construction costs, and can recycle slag, reduce the pollution of steel cinder dust to environment.
Slag is the industrial waste of steelworks, always bulk deposition and nobody shows any interest in.Test shows that slag has outstanding wear resistance, is best one of the gathering materials of cling property.
Slag has the following advantages as the coarse aggregate of stone mastic asphalt:
1. from technical feature, slag is tough and tensile, coarse, corner angle are arranged, and has good adhesivity with pitch.And, contain Ca in the slag 2+, Mg 2+, Fe 3+, Al 3+, Mn 2+Etc. a large amount of positively charged ions, the material generation chemical reactions such as asphaltous acid in they and the pitch generate the pitch hydrochlorate, constitute chemisorbed layer on the slag surface, can increase the cohesive force of pitch and slag, and make asphalt have good water stability.Thereby slag is as the coarse aggregate excellent property of compound.
2. from economic angle, the slag low price, large-scale application can reduce cost of raw and processed materials, thereby reduces highway construction cost.And slag storage abundance, can alleviate the insufficient present situation of raw material supply greatly.
3. analyze from the environment aspect, the slag bulk deposition takies the big area place, and simultaneously, steel cinder dust pollutes has become one of principal element that influences environment.Utilize slag to address these problems rationally and effectively, and can produce the huge social benefit.
Summary of the invention
Stone mastic asphalt of the present invention (SMA), by gather materials, breeze, fiber stabilizer and asphaltic binder form, gathering materials comprises coarse aggregate and fine aggregate, described coarse aggregate adopts slag, fine aggregate adopts machine-processed sand as far as possible.Slightly, fine aggregate and breeze are called mineral aggregate.Described slag should be that the waste residue that steelworks is discharged was deposited more than 1 year, the material of the stable in properties that obtains after process magnetic separation again, the screening.The content of free calcium oxide should be controlled at below 2% in the slag.The technical feature of slag should satisfy the mechanical index requirement of stone mastic asphalt to coarse aggregate, sees Table 1.
Table 1 stone mastic asphalt is to the mechanical index requirement of coarse aggregate
Index Technical requirements
Building stones crush values (%) Be not more than 25
Los Angeles wear(ing)value (%) Be not more than 30
Water-intake rate (%) Be not more than 2.0
Volume density (g/cm 3) Be not less than 2.60
Faller gill shape content (%) Be not more than 15
Soft grain in aggregate (%) Be not more than 1
Soundness (%) Be not more than 12
To the bituminous adhesivity Be not less than 4 grades
Slightly, the cooperation ratio of fine aggregate should be decided according to grating situation separately.Generally speaking, among the SMA-16, the above coarse aggregate of 4.75mm adopts slag, and its consumption should be controlled at 68~80% of mineral aggregate weight, is controlled at about 75% as far as possible, and fine aggregate and breeze account for 20~32%.Bitumen aggregate ratio (being the mass ratio of asphaltic binder and mineral aggregate) is 5.0%~5.3%, and the lignin fibre consumption is 0.267% of a compound consumption.
Embodiment
Below specific embodiments of the invention are described in more detail.
Coarse aggregate in the SMA-16 stone mastic asphalt adopts the Shoudu Iron and Steel Co slag, and fine aggregate and breeze adopt limestone.The main character index of Shoudu Iron and Steel Co slag sees Table 2, and by comparison, table 3 is listed the basaltic main character index in Zhangjiakou.
Table 2 slag main character index table
Sieve aperture (mm) Bulk density (g/cm 3) Water-intake rate (%) Soft rock content (%) Faller gill shape content (%) Crush values (%) Los Angeles abrasion (%) Soundness (%) Adhesivity
????16 ????3.21 ????1.18 Do not have ???10.8 ??14.4 ????16 ????4.7 4 grades
????13.2 ????3.201 ????1.26
????9.5 ????3.234 ????1.24
????4.75 ????3.127 ????1.90
As seen from the table, the every performance of slag all can satisfy the technical requirements of stone mastic asphalt to coarse aggregate, and free calcium oxide content is 0.54% in the slag, and less than 2%, its stability meets the demands.
Table 3 basalt main character index table
Sieve aperture (mm) Bulk density (g/cm 3) Water-intake rate (%) Soft rock content (%) Faller gill shape content (%) Crush values (%) Los Angeles abrasion (%) Soundness (%) Adhesivity
??16 ????2.808 ??1.37 Do not have ???6.7 ????12.8 ????13.8 ????1.0 4 grades
??13.2 ????2.812 ??1.37
??9.5 ????2.820 ??1.45
??4.75 ????2.817 ??1.57
From above-mentioned table 2,3 slags and basaltic technical indicator, slag density is bigger than basalt.The ultimate compression strength that crush values, abrasion reflection are gathered materials, the trial value of slag is more bigger than basalt, illustrates that slag compressive strength rate basalt is lower slightly.
The mineral aggregate formate gradation composition of stone mastic asphalt of the present invention sees Table 4.
Table 4 mineral aggregate formate gradation composition table
Sieve aperture (mm) Slag percent of pass (%) Basalt percent of pass (%) Grading limit (%)
????16 ????95 ????95 ????90~100
????13.2 ????75 ????75 ????65~85
????9.5 ????55 ????55 ????45~65
????4.75 ????25 ????26 ????20~32
????2.36 ????19.5 ????19.5 ????15~24
????1.18 ????18 ????18 ????14~22
????0.6 ????15 ????15 ????12~18
????0.3 ????12.5 ????12.5 ????10~15
????0.15 ????11.5 ????11.5 ????9~14
????0.075 ????10 ????10 ????8~12
Make the performance difference of SMA coarse aggregate in order to compare slag and basalt, carry out the performance comparison test at two kinds of SMA that gather materials, the content of test is respectively high-temperature stability and the water stability of SMA.The test of high-temperature stability check is Marshall Test and wheel tracking test, and evaluation index is Marshall stability and dynamic stability.The test of water stability check is immersion Martens test and freeze thawing split test, and evaluation index is residual Marshall stability and freeze thawing cleavage strength ratio.In two groups of tests, except that coarse aggregate adopted slag and basalt respectively, all the other test conditionss were identical.Asphaltic binder adopts Panjin 90 #Heavy traffic asphaltum, modifying asphalt adopts the SBS modification, and volume 5%, fiber adopt German JR lignin fibre, fiber consumption 0.267%.Test-results sees Table 5, table 6, table 7.
The SMA-16 compound wheel tracking test result of table 5 Different Coarse Aggregates
The coarse aggregate kind The binder kind Bitumen aggregate ratio (%) Dynamic stability (inferior/mm) Code requirement (inferior/mm)
Basalt Modifying asphalt ????5.9 ????5538 ??>3000
Non-modifying asphalt ????5.6 ????2453 ??>1500
Slag Modifying asphalt ????5.3 ????5559 ??>3000
Non-modifying asphalt ????5.0 ????2400 ??>1500
The SMA-16 compound Marshall Test result of table 6 Different Coarse Aggregates
The coarse aggregate kind The binder kind Bitumen aggregate ratio (%) Stability (KN) Code requirement (KN) Flow valuve (mm) Code requirement (mm)
Basalt Modifying asphalt ????5.9 ??8.59 ??>6.0 ?2.70 ??2~5
Non-modifying asphalt ????5.6 ??8.25 ??>5.5 ?3.32 ??2~4
Slag Modifying asphalt ????5.3 ??12.41 ??>6.0 ?3.94 ??2~5
Non-modifying asphalt ????5.0 ??8.20 ??>5.5 ?3.89 ??2~4
Table 7 stone mastic asphalt water stability and active check
Compound The slag asphalt The basalt asphalt Code requirement
Cubical expansivity ????0.6% ????0.5% Be not more than 1%
Immersion Marshall stability ratio ????90.0% ????88.6% Be not less than 80%
The freeze thawing cleavage strength is than (TSR) ????91.5% ????86.7% Be not less than 75%
According to table 5 and table 6, from the dynamic stability of slag and basalt stone mastic asphalt and the test-results of Marshall stability, two kinds of dynamic stabilities that gather materials are more or less the same, Marshall stability also remains on same level, and, illustrate that two kinds are gathered materials and are used for stone mastic asphalt the high-temperature stability impact effect of compound is more or less the same all greater than code requirement.From the water stability angle, the residual Marshall stability of slag stone mastic asphalt and freeze thawing cleavage strength illustrate that than all greater than the basalt stone mastic asphalt water stability of slag stone mastic asphalt is better than the basalt stone mastic asphalt.
Performances such as the physics of slag of the present invention, chemistry and mechanics all meet does the high-grade highway road with the technical indicator of gathering materials, and is a kind ofly to can be used for the good of high-grade highway and gather materials.Every performance index of described slag stone mastic asphalt all can reach code requirement, and have good volume stability and higher mechanical property, can be used in the upper layer of high-grade highway, urban road bituminous pavement, this type of material excellent road performance, environmental sound and low price, thereby be with a wide range of applications.

Claims (6)

1. stone mastic asphalt, by gather materials, breeze, fiber stabilizer and asphaltic binder form, gather materials and comprise coarse aggregate and fine aggregate, it is characterized in that: described coarse aggregate adopts slag, fine aggregate adopts machine-processed sand, and the consumption of coarse aggregate is controlled at 68~80% of mineral aggregate weight, and fine aggregate and breeze account for 20~32% of mineral aggregate weight, the bitumen aggregate ratio of described compound is 5.0%~5.3%, and the lignin fibre consumption is 0.267% of a compound consumption.
2. compound according to claim 1 is characterized in that: the physical and mechanical property index of described slag is:
Building stones crush values≤25%, Los Angeles wear(ing)value≤30%,
Water-intake rate≤2.0%, volume density 〉=2.60g/cm 3,
Faller gill shape content≤15%, soft grain in aggregate≤1%,
Soundness≤12% is to bituminous adhesivity 〉=4 grade.
3. compound according to claim 1 and 2 is characterized in that: the consumption of coarse aggregate slag should be controlled at 75% of mineral aggregate weight in the described compound.
4. compound according to claim 3 is characterized in that: described slag is that the waste residue that steelworks is discharged was deposited more than 1 year, the material that obtains after process magnetic separation again, the screening, and the content of free calcium oxide is controlled at below 2% in the slag.
5. compound according to claim 1 and 2 is characterized in that: described slag is that the waste residue that steelworks is discharged was deposited more than 1 year, the material that obtains after process magnetic separation again, the screening, and the content of free calcium oxide is controlled at below 2% in the slag.
6. the application of the described stone mastic asphalt of above-mentioned any one claim, described compound can be applicable in the upper layer of highway, urban road bituminous pavement.
CNB02116245XA 2002-03-22 2002-03-22 Asphalt-mastic-broken stone mixture using steel slag as coarse aggregate and its application CN1182064C (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101948272A (en) * 2010-09-25 2011-01-19 钱卫胜 Rubber bituminous mixture partially using slag as coarse aggregate
CN101973726A (en) * 2010-09-25 2011-02-16 钱卫胜 Porous pavement partially taking steel slag as coarse aggregate
CN102518017A (en) * 2011-12-23 2012-06-27 上海宝田新型建材有限公司 Steel slag ecological permeable pavement brick and production method thereof
WO2014094318A1 (en) * 2012-12-17 2014-06-26 武汉理工大学 Foamed asphalt-steel slag mixture and method for preparing thereof
CN104074113A (en) * 2014-06-30 2014-10-01 四川公路桥梁建设集团有限公司 Stable mineral-powder-doped graded macadam bedding layer and flexible base layer
CN104591572A (en) * 2015-01-05 2015-05-06 葛洲坝武汉道路材料有限公司 Production method of steel slag aggregate for asphalt concrete
CN104631269A (en) * 2015-01-05 2015-05-20 葛洲坝武汉道路材料有限公司 Synchronous pavement surface dressing material for steel slag aggregate for road maintenance, and construction method thereof
CN108872534A (en) * 2018-06-16 2018-11-23 扬州大学 Sand particles material soil test method
CN109704650A (en) * 2019-01-26 2019-05-03 上海宝新特种沥青混凝土有限公司 A kind of wear-resisting Recycled Asphalt Pavement and its preparation process
CN109796155A (en) * 2019-01-23 2019-05-24 广东贝林建筑设计有限公司 A kind of bituminous concrete and its road construction method
CN111410457A (en) * 2020-03-27 2020-07-14 江苏东交智控科技集团股份有限公司 Environment-friendly durable pavement, upper concrete layer thereof and paving method
CN109704650B (en) * 2019-01-26 2021-05-28 上海宝新特种沥青混凝土有限公司 Wear-resistant recycled asphalt concrete and preparation process thereof

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101973726A (en) * 2010-09-25 2011-02-16 钱卫胜 Porous pavement partially taking steel slag as coarse aggregate
CN101948272A (en) * 2010-09-25 2011-01-19 钱卫胜 Rubber bituminous mixture partially using slag as coarse aggregate
CN101948272B (en) * 2010-09-25 2012-09-26 上海佳砼新材料科技发展有限公司 Rubber bituminous mixture partially using slag as coarse aggregate
CN101973726B (en) * 2010-09-25 2012-11-14 钱卫胜 Porous pavement partially taking steel slag as coarse aggregate
CN102518017B (en) * 2011-12-23 2014-09-03 上海宝田新型建材有限公司 Steel slag ecological permeable pavement brick and production method thereof
CN102518017A (en) * 2011-12-23 2012-06-27 上海宝田新型建材有限公司 Steel slag ecological permeable pavement brick and production method thereof
WO2014094318A1 (en) * 2012-12-17 2014-06-26 武汉理工大学 Foamed asphalt-steel slag mixture and method for preparing thereof
CN104074113B (en) * 2014-06-30 2016-06-22 四川公路桥梁建设集团有限公司 Granular cushion stablized by breeze
CN104074113A (en) * 2014-06-30 2014-10-01 四川公路桥梁建设集团有限公司 Stable mineral-powder-doped graded macadam bedding layer and flexible base layer
CN104631269A (en) * 2015-01-05 2015-05-20 葛洲坝武汉道路材料有限公司 Synchronous pavement surface dressing material for steel slag aggregate for road maintenance, and construction method thereof
CN104591572A (en) * 2015-01-05 2015-05-06 葛洲坝武汉道路材料有限公司 Production method of steel slag aggregate for asphalt concrete
CN108872534A (en) * 2018-06-16 2018-11-23 扬州大学 Sand particles material soil test method
CN109796155A (en) * 2019-01-23 2019-05-24 广东贝林建筑设计有限公司 A kind of bituminous concrete and its road construction method
CN109704650A (en) * 2019-01-26 2019-05-03 上海宝新特种沥青混凝土有限公司 A kind of wear-resisting Recycled Asphalt Pavement and its preparation process
CN109704650B (en) * 2019-01-26 2021-05-28 上海宝新特种沥青混凝土有限公司 Wear-resistant recycled asphalt concrete and preparation process thereof
CN111410457A (en) * 2020-03-27 2020-07-14 江苏东交智控科技集团股份有限公司 Environment-friendly durable pavement, upper concrete layer thereof and paving method

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