CN102584111A - Steel slag asphalt graded crushed rock mixture - Google Patents
Steel slag asphalt graded crushed rock mixture Download PDFInfo
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- CN102584111A CN102584111A CN2012100119793A CN201210011979A CN102584111A CN 102584111 A CN102584111 A CN 102584111A CN 2012100119793 A CN2012100119793 A CN 2012100119793A CN 201210011979 A CN201210011979 A CN 201210011979A CN 102584111 A CN102584111 A CN 102584111A
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- 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
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- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention discloses steel slag asphalt graded crushed rock mixture. The steel slag asphalt graded crushed rock mixture comprises the following components in percentage by weight: 90-93 percent of aggregate particle, 4-6 percent of asphalt and 3-4 percent of limestone mineral powder, wherein the aggregate comprises the following four grain compositions in percentage by weight: 21-24 percent of grain composition 1, 20-28 percent of grain composition 2, 19-25 percent of grain composition 3 and 32-37 percent of grain composition 4; the granularity of the grain composition 1 is smaller than or equal to 31.5mm and larger than 19mm, the granularity of the grain composition 2 is smaller than or equal to 19mm and larger than 9.5mm, the granularity of the grain composition 3 is smaller than or equal to 9.5mm and larger than 4.75mm, and the granularity of the grain composition 4 is smaller than or equal to 4.75mm and larger than 0mm; and the aggregate is steel slag or the mixture of the steel slag and limestone. Proved by experiments, the mixture has the advantages of low cost, reasonable granularity grain size distribution, water proof performance and good stability.
Description
Technical field
The invention belongs to highway structure material technology field, specifically be meant a kind of slag pitch graded broken stone mixture that is used for the highway flexbile base.
Background technology
In the motorway that built in China becomes more than 90% is to be that basic unit, bituminous concrete are the road surface of surface layer with the semi-rigid material, i.e. semi-rigid pavement.This pavement structure has intensity and the high advantage of supporting capacity, but its shortcoming also clearly embodies a concentrated reflection of: 1) the semi-rigid sub-base material shrinkage is bigger, very easily causes the reflection crack of bituminous pavement, causes local check crack and hole, hole; 2) the semi-rigid type base drainage performance is poor, is prone to cause hydropexis between basic unit and surface layer, thereby it is stressed and cause the basic unit total bearing capacity to descend to influence the road surface; 3) semi-rigid asphalt pavement has bigger axle year susceptibility to traction engine, and is very unfavorable to the work-ing life of semi-rigid asphalt pavement, and especially highroad transportation overrun and overload phenomenon is particularly outstanding.And flexbile base is compared semi-rigid type base except having the strong advantage of anti-overload capacity, and its toughness is better, can produce reflection crack hardly.And its water stability ability is good, is difficult for recurring structure property destruction.Therefore the flexbile base structure has obtained road worker's favor in recent years.Comparatively common flexbile base material is pitch graded broken stone mixture, graded gravel compound etc.
The pitch graded broken stone mixture mainly uses natural rocks such as Irish touchstone, ls to be main aggregate at present.But these natural rocks have seldom or almost do not have reserves in the most of areas of China, thereby their price is higher.According to statistics, if the ls of China according to existing spending rate, can only be kept the supply in 20 years again.Slag is a kind of industrial solid wastes that smelting iron and steel enterprise produces; Output is about 15～20% of crude steel output; China's steel-making enterprise all has big steel slag to produce every year; China's slag YO in 2010 has reached 2,000 ten thousand tons, and the slag of accumulation not only takies a large amount of soils, and causes environmental pollution.Had both at home and abroad enterprise that slag is widely used in bed course, the structural sheet of road foundation, You Yi can significantly drive the slag demands of applications like this as the aggregate surfacing layer of asphalt mixture, alleviates the harm of slag to ecotope.But these mainly concentrate on the application of oil mat to Multipurpose Utilization of Steel Slag in the road engineering field at present, and lack the precedent of using the slag preparation to be applied to the pitch graded broken stone mixture of highway flexbile base structure.
Summary of the invention
The object of the invention be exactly to provide a kind of with low cost, grain size distribution rationally, water resistance and the good slag pitch graded broken stone mixture of stability.
For realizing above-mentioned purpose; Slag pitch graded broken stone mixture of the present invention; Its special character is that the each component weight percent content of this compound is: particles of aggregates accounts for 90～93%, and pitch accounts for 4～6%; Limestone dust accounts for 3～4%; Said aggregate is made up of four kinds of grain compositions of 31.5mm >=granularity＞19mm, 19 >=granularity＞9.5mm, 9.5 >=granularity＞4.75mm, 4.75 >=granularity＞0mm, and the weight percent of said four kinds of grain compositions in aggregate is followed successively by 21～24%, 20～28%, 19～25% and 32～37%, and said aggregate is the mixture of slag or slag and Wingdale.
Preferably, in four kinds of grain compositions of said aggregate, 31.5mm >=granularity＞19mm's is slag, other granularity be Wingdale; Perhaps, said 31.5mm >=granularity＞19mm and 19 >=granularity＞9.5mm's is slag, other granularity be Wingdale; Perhaps, said 4.75 >=granularity＞0mm is a Wingdale, the slag of other granularity.So selection can enlarge the range of application of slag better; Make the slag of granularity about 31.5mm also can be used as the building material of pitch graded broken stone mixture; And; Heterozygous grating through design slag and Wingdale effectively reduces required asphalt content, can significantly reduce the preparation cost of this slag pitch graded broken stone mixture.
Preferably, said pitch is the 70# heavy traffic paving asphalt, than engineering polymer modified asphalt commonly used, uses this bituminous slag graded broken stone mixture construction workability better, and lower cost.
Preferably, the apparent relative density of said slag is at 3.300～3.400g/cm
3Between.Preferably, the apparent relative density of said Wingdale is at 2.600～2.800g/cm
3Between.
Preferably, the size-grade distribution of described limestone dust is: the 0.6mm percent of pass is 100%, and the 0.15mm percent of pass is that 95～100%, 0.075 percent of pass is 90～100%.
Preferably, free calcium oxide content is controlled at below 1.5% in the said slag.Because free calcium oxide content surpasses after 1.5% in slag; Very easily cause slag pitch graded broken stone mixture to meet the water volume expanding, produce the crack, collapse diseases such as broken, and then the serious threat oil mat; Diseases such as generation is subsided, reflective crack, thus the highway active time shortened.
Preferably, said slag soaks the 120h cubical expansivity and is not more than 2% in 60 ℃ of hot water.The slag of this performance can guarantee that pitch and asphalt mastic to the parcel fully of slag, form the isolation effect of steel slag particle to water, guarantees the Stability Analysis of Structures of this slag pitch graded broken stone mixture.
The reason that each component mechanism of action in the slag pitch graded broken stone mixture of the present invention and content thereof limit is following:
Compare with traditional building stones such as Irish touchstone, ls; It is good that slag has intensity height, wear resistance and anti-skid, and with pitch good adhesivity is arranged, and the aggregate of slag pitch graded broken stone mixture of the present invention is selected clean steel slag grating for use or adopted slag and the heterozygous grating of Wingdale composition; And according to size distribution rule behind the characteristics of pitch stabilized macadam base (ATB) suspension compact structure and the slag crushing; Aggregate is selected by four kinds of grain compositions and specific weight proportion, not only maximally utilised the slag of each size, and more help the inner interference each other of gathering materials of compound; The influence that feasible thicker previous stage is gathered materials and by thinner back one-level; Secondary gathering materials to blocking prime, the coarse aggregate of prime can't directly be contacted each other, like this; Can not inlay the formation skeleton between the coarse aggregate; Just as general among the fine aggregate that is suspended in asphalt mastic and time one-level, less, the inner cohesion of the voidage of suspension compact structure is then relatively large, and its relative water resistance is excellent.
Slag pitch graded broken stone mixture of the present invention; Have higher structural-load-carrying capacity and endurance quality; Can effectively improve supporting capacity and anti-water damage, cracking resistance seam, the anti-overload ability of highway; And manufacturing and maintenance cost are cheap, can be used as the flexbile base material and are used for motorway, Class I highway and other standard highway.
Embodiment
Below in conjunction with specific embodiment slag pitch graded broken stone mixture of the present invention is done further explain.
Embodiment 1
A kind of slag pitch graded broken stone mixture; Its each component weight percent content is: particles of aggregates accounts for 92%; The 70# heavy traffic paving asphalt accounts for 5%; Limestone dust accounts for 3%, and this aggregate is made up of the slag of four kinds of grain compositions of 31.5mm>=granularity＞19mm, 19>=granularity＞9.5mm, 9.5>=granularity＞4.75mm, 4.75>=granularity＞0mm, and the weight percent of four kinds of grain compositions in aggregate is followed successively by 21%, 22%, 21% and 36%; This slag be Wuhan Iron and Steel Company's converter slag under field conditions (factors) ageing make slag after 3 years, the apparent relative density of selected slag is at 3.300～3.400g/cm
3Between, in the slag free calcium oxide content below 1.5%, slag soaks the 120h cubical expansivity and is not more than 2% in 60 ℃ of hot water; The apparent relative density of selected Wingdale is at 2.600～2.800g/cm
3Between, the size-grade distribution of the limestone dust that is adopted is: the 0.6mm percent of pass is 100%, and the 0.15mm percent of pass is 95～100%, and the 0.075mm percent of pass is 90～100%.
Embodiment 2
A kind of slag pitch graded broken stone mixture; Its each component weight percent content is: particles of aggregates accounts for 90%; Pitch accounts for 6%; Limestone dust accounts for 4%, and this aggregate is made up of 31.5mm>=granularity＞19mm, 19>=granularity＞9.5mm, the 9.5>=granularity＞steel slag particle of three kinds of gratings of 4.75mm and the limestone particle of 4.75>=granularity＞0mm, and the weight percent of four kinds of grain compositions in aggregate is followed successively by 22%, 24%, 22% and 32%; Slag wherein be Wuhan Iron and Steel Company's converter slag under field conditions (factors) ageing make after 3 years, the apparent relative density of selected slag is at 3.300～3.400g/cm
3Between, in the slag free calcium oxide content below 1.3%, slag soaks the 120h cubical expansivity and is not more than 2% in 60 ℃ of hot water; The apparent relative density of selected Wingdale is at 2.600～2.700g/cm
3Between, the size-grade distribution of the limestone dust that is adopted is: the 0.6mm percent of pass is 100%, and the 0.15mm percent of pass is 95～100%, and the 0.075mm percent of pass is 90～100%.
Embodiment 3
A kind of slag pitch graded broken stone mixture; Its each component weight percent content is: particles of aggregates accounts for 93%; Pitch accounts for 4%; Limestone dust accounts for 3%; This aggregate is made up of the limestone particle of the steel slag particle of 31.5mm>=granularity＞19mm, 19>=granularity＞two kinds of gratings of 9.5mm and 9.5>=granularity＞4.75mm, 4.75>=granularity＞two kinds of gratings of 0mm, and the weight percent of four kinds of grain compositions in aggregate is followed successively by 24%, 20%, 20% and 36%, and the apparent relative density of selected slag is at 3.300～3.400g/cm
3Between, in the slag free calcium oxide content below 1.2%, slag soaks the 120h cubical expansivity and is not more than 2% in 60 ℃ of hot water; Its apparent relative density of selected Wingdale is at 2.700～2.800g/cm
3Between, the size-grade distribution of the limestone dust that is adopted is: the 0.6mm percent of pass is 100%, and the 0.15mm percent of pass is 95～100%, and the 0.075mm percent of pass is 90～100%.
Embodiment 4
A kind of slag pitch graded broken stone mixture; Its each component weight percent content is: particles of aggregates accounts for 92%; Pitch accounts for 4.5%; Limestone dust accounts for 3.5%; This aggregate is made up of the limestone particle of the steel slag particle of 31.5mm>=granularity＞19mm and 19>=granularity＞9.5mm, 9.5>=granularity＞4.75mm, three kinds of gratings of 4.75>=granularity 0mm, and the weight percent of four kinds of grain compositions in aggregate is followed successively by 21%, 28%, 19% and 32%, and the apparent relative density of selected slag is at 3.300～3.400g/cm
3Between, in the slag free calcium oxide content below 1.4%, slag soaks the 120h cubical expansivity and is not more than 2% in 60 ℃ of hot water; Its apparent relative density of selected Wingdale is at 2.700～2.800g/cm
3Between, the size-grade distribution of the limestone dust that is adopted is: the 0.6mm percent of pass is 100%, and the 0.15mm percent of pass is 95～100%, and the 0.075mm percent of pass is 90～100%.
Embodiment 5
A kind of slag pitch graded broken stone mixture; Its each component weight percent content is: particles of aggregates accounts for 90%; Pitch accounts for 6%; Limestone dust accounts for 4%; This aggregate is made up of the limestone particle of the steel slag particle of 31.5mm>=granularity＞19mm, 19>=granularity＞two kinds of gratings of 9.5mm and 9.5>=granularity＞4.75mm, two kinds of gratings of 4.75>=granularity 0mm, and the weight percent of four kinds of grain compositions in aggregate is followed successively by 24%, 25%, 19% and 32%, and the apparent relative density of selected slag is at 3.300～3.400g/cm
3Between, in the slag free calcium oxide content below 1.2%, slag soaks the 120h cubical expansivity and is not more than 2% in 60 ℃ of hot water; Its apparent relative density of selected Wingdale is at 2.700～2.800g/cm
3Between, the size-grade distribution of the limestone dust that is adopted is: the 0.6mm percent of pass is 100%, and the 0.15mm percent of pass is 95～100%, and the 0.075mm percent of pass is 90～100%.
Compound to the foregoing description 1～5; Taking by weighing each grade steel slag particle and limestone particle by determined mixing ratio by weight adopts the intermittent type whipping device to mix; In 180 ℃ of baking ovens, dry then to constant weight; Pour into again in the mix equipment, and add the pitch and the limestone dust of corresponding ratio, evenly mix and stir the preparation that 90～120s can accomplish slag pitch graded broken stone mixture.
Various mechanical properties to the slag pitch graded broken stone mixture of above-mentioned each embodiment are tested, and correspondence is as shown in table 1 as a result:
Table 1
Correspondence is as shown in table 2 as a result to the low-temperature bending test under 0 ℃ of condition of slag pitch graded broken stone mixture of the foregoing description:
Table 2
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | |
| Flexural-tensile strain (μ ε) | ?2845 | ?2302 | ?1786 | 2436 | 2207 |
| Strain energy (J) | ?0.308 | ?0.262 | ?0.242 | 0.253 | 0.256 |
Table 1 data presentation, slag graded broken stone mixture of the present invention Marshall stability (all greater than 15kN), cleavage strength (all greater than 1.3MPa) value higher, prove that it has excellent mechanics supporting capacity.The immersion Marshall stability explains behind 60 ℃ of hot-water soak 48h that all greater than 13kN its mechanics supporting capacity decay is less, has proved that it has anti-water damage ability preferably.Simultaneously, this slag graded broken stone mixture dynamic stability satisfies the requirement of highway in China asphalt pavement construction technical specifications JTG F40-2004 all greater than 1300 times/mm.
The flexural-tensile strain value is represented the strain after the pitch graded broken stone mixture receives stress to be loaded on destruction under coldcondition.The flexural-tensile strain value is big more, represents it to have better low-temperature flexibility.Table 2 data presentation; The flexural-tensile strain of slag pitch graded broken stone mixture of the present invention is all greater than 2200 μ ε; The flexural-tensile strain value that is higher than the Wingdale pitch graded broken stone mixture (flexural-tensile strain is between 1600-1832 μ ε under the equal test conditions) that extensively adopts at present far away proves that slag pitch graded broken stone mixture of the present invention has toughness and opposing cold cracking preferably under low-temperature condition.Strain energy refer to the pitch graded broken stone mixture under coldcondition from the required energy of standard state to collapse state.This energy is big more, proves that compound low temperature survivability is strong more.Table 2 data presentation, the strain energy of slag pitch graded broken stone mixture of the present invention are higher than the strain energy of the Wingdale pitch graded broken stone mixture (strain energy is between 0.191-0.204 under the equal test conditions) that extensively adopts at present all greater than 0.242J.Prove that slag pitch graded broken stone mixture of the present invention has more outstanding low temperature anti-damage performance.
Claims (10)
1. slag pitch graded broken stone mixture; It is characterized in that; The each component weight percent content of this compound is: particles of aggregates accounts for 90～93%; Pitch accounts for 4～6%, and limestone dust accounts for 3～4%, and said aggregate is made up of four kinds of grain compositions of 31.5mm >=granularity＞19mm, 19 >=granularity＞9.5mm, 9.5 >=granularity＞4.75mm, 4.75 >=granularity 0mm; The weight percent of said four kinds of grain compositions in aggregate is followed successively by 21～24%, 20～28%, 19～25% and 32～37%, and said aggregate is the mixture of slag or slag and Wingdale.
2. slag pitch graded broken stone mixture according to claim 1 is characterized in that: in four kinds of grain compositions of said aggregate, 31.5mm >=granularity＞19mm's is slag, other granularity be Wingdale.
3. slag pitch graded broken stone mixture according to claim 1 is characterized in that: in four kinds of grain compositions of said aggregate, 31.5mm >=granularity＞19mm and 19 >=granularity＞9.5mm's is slag, other granularity be Wingdale.
4. slag pitch graded broken stone mixture according to claim 1 is characterized in that: in four kinds of grain compositions of said aggregate, 4.75 >=granularity 0mm is a Wingdale, the slag of other granularity.
5. according to any described slag pitch graded broken stone mixture in the claim 1～4, it is characterized in that: said pitch is the 70# heavy traffic paving asphalt.
6. according to any described slag pitch graded broken stone mixture in the claim 1～4, it is characterized in that: the apparent relative density of said slag is at 3.300～3.400g/cm
3Between.
7. according to any described slag pitch graded broken stone mixture in the claim 1～4, it is characterized in that: the apparent relative density of said Wingdale is at 2.600～2.800g/cm
3Between.
8. according to any described slag pitch graded broken stone mixture in the claim 1～4; It is characterized in that: the size-grade distribution of said limestone dust is: the 0.6mm percent of pass is 100%; 0.15mm percent of pass is 95～100%, the 0.075mm percent of pass is 90～100%.
9. according to any described slag pitch graded broken stone mixture in the claim 1～4, it is characterized in that: free calcium oxide content is controlled at below 1.5% in the said slag.
10. according to any described slag pitch graded broken stone mixture in the claim 1～4, it is characterized in that: said slag soaks the 120h cubical expansivity and is not more than 2% in 60 ℃ of hot water.
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103224347A (en) * | 2013-05-08 | 2013-07-31 | 武汉钢铁(集团)公司 | Steel slag permeable asphalt mixture |
| CN103408253A (en) * | 2013-07-29 | 2013-11-27 | 同济大学 | Method of bitumen solidification for waste incineration slag aggregate |
| CN103553393A (en) * | 2013-10-22 | 2014-02-05 | 江苏宝利沥青股份有限公司 | Method for improving property of steel slag bituminous mixture by grinding treatment |
| CN104074113A (en) * | 2014-06-30 | 2014-10-01 | 四川公路桥梁建设集团有限公司 | Mineral powder stable graded broken stone cushion 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 |
| CN105442402A (en) * | 2015-11-09 | 2016-03-30 | 四川公路桥梁建设集团有限公司 | Recycled powder stable graded broken stone cushion layer |
| CN105565708A (en) * | 2015-12-14 | 2016-05-11 | 上海中冶环境工程科技有限公司 | Building mastic gravel-asphalt mixture |
| CN106045384A (en) * | 2016-05-27 | 2016-10-26 | 西安建筑科技大学 | Single-grading-particle-size steel slag permeable asphalt mixture |
| CN106951721A (en) * | 2017-04-14 | 2017-07-14 | 广州大学 | A kind of thick-layer paves the big space Emulsified Asphalt Mixture of cold mixing and its method for designing |
| CN108395149A (en) * | 2018-03-06 | 2018-08-14 | 内蒙古交通设计研究院有限责任公司 | A kind of environmental protection and economy type asphalt stabilized base course mixtures and preparation method thereof |
| CN110407494A (en) * | 2019-05-17 | 2019-11-05 | 江苏瑞沃建设集团有限公司 | A kind of preparation method of the modified steel scoria asphalt with low volume expansion |
| CN111018408A (en) * | 2019-12-11 | 2020-04-17 | 山东省交通科学研究院 | Permanent bituminous paving antiskid wearing and tearing layer |
| 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 |
| CN111559892A (en) * | 2020-06-05 | 2020-08-21 | 杨琼 | Preparation method of steel slag cement stabilized macadam raw material based on different specifications |
| CN111675508A (en) * | 2020-05-29 | 2020-09-18 | 上海海事大学 | Preparation method of anti-skid and wear-resistant colored asphalt concrete |
| CN111704393A (en) * | 2020-06-23 | 2020-09-25 | 杨琼 | Steel slag asphalt concrete formula |
| CN112209684A (en) * | 2020-10-20 | 2021-01-12 | 长沙理工大学 | Road base material and preparation method thereof |
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| CN103224347B (en) * | 2013-05-08 | 2015-05-27 | 武汉钢铁(集团)公司 | Steel slag permeable asphalt mixture |
| CN103224347A (en) * | 2013-05-08 | 2013-07-31 | 武汉钢铁(集团)公司 | Steel slag permeable asphalt mixture |
| CN103408253A (en) * | 2013-07-29 | 2013-11-27 | 同济大学 | Method of bitumen solidification for waste incineration slag aggregate |
| CN103408253B (en) * | 2013-07-29 | 2015-02-18 | 同济大学 | Method of bitumen solidification for waste incineration slag aggregate |
| CN103553393A (en) * | 2013-10-22 | 2014-02-05 | 江苏宝利沥青股份有限公司 | Method for improving property of steel slag bituminous mixture by grinding treatment |
| CN104074113A (en) * | 2014-06-30 | 2014-10-01 | 四川公路桥梁建设集团有限公司 | Mineral powder stable graded broken stone cushion layer and flexible base layer |
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| CN105442402A (en) * | 2015-11-09 | 2016-03-30 | 四川公路桥梁建设集团有限公司 | Recycled powder stable graded broken stone cushion layer |
| CN105565708B (en) * | 2015-12-14 | 2019-01-22 | 上海中冶环境工程科技有限公司 | A kind of mastic-broken stone asphalt |
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| CN106045384A (en) * | 2016-05-27 | 2016-10-26 | 西安建筑科技大学 | Single-grading-particle-size steel slag permeable asphalt mixture |
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| 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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| CN111559892A (en) * | 2020-06-05 | 2020-08-21 | 杨琼 | Preparation method of steel slag cement stabilized macadam raw material based on different specifications |
| CN111704393A (en) * | 2020-06-23 | 2020-09-25 | 杨琼 | Steel slag asphalt concrete formula |
| CN112209684A (en) * | 2020-10-20 | 2021-01-12 | 长沙理工大学 | Road base material and preparation method thereof |
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Application publication date: 20120718 |