CN106676999A - Red mud and red mud stabilized macadam combined type base pavement structure - Google Patents
Red mud and red mud stabilized macadam combined type base pavement structure Download PDFInfo
- Publication number
- CN106676999A CN106676999A CN201710071278.1A CN201710071278A CN106676999A CN 106676999 A CN106676999 A CN 106676999A CN 201710071278 A CN201710071278 A CN 201710071278A CN 106676999 A CN106676999 A CN 106676999A
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- Prior art keywords
- red mud
- base
- pavement structure
- asphalt
- stabilized macadam
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a red mud and red mud stabilized macadam combined type base pavement structure, and belongs to the field of road engineering. The pavement structure comprises an asphalt mixture structure layer, a modified red mud stabilized macadam base and a modified red mud subbase, wherein the asphalt mixture structure layer, the modified red mud stabilized macadam base and the modified red mud subbase are paved on a soil base from up to down. According to the red mud and red mud stabilized macadam combined type base pavement structure, the advantage of rigidity complementation between the modified red mud subbase and the red mud stabilized macadam base is fully utilized, a novel pavement structure is formed by reasonable structural combination, application of industrial waste residue red mud in a pavement structure base and a subbase is achieved, and the adopted combined base structure improves the rigidity uniformity of a pavement base, reduces the damages such as cracking and slurry pumping of a traditional semi-rigid base asphalt pavement, achieves resource utilization of industrial waste red mud, and prolongs the service life of an asphalt pavement structure.
Description
Technical field
The present invention relates to field of road, specifically a kind of red mud and red mud stabilization gravel Combined base road surface
Structure.
Background technology
Red mud is that aluminium industry extracts the contaminative waste residue discharged during aluminum oxide, and average often produces 1 ton of aluminum oxide, attached
Band produces 1.0~2.0 tons of red muds.About 70,000,000 tons of the red mud that the whole world is produced every year, the red mud that China produces every year is 3000
More than ten thousand tons.Current substantial amounts of red mud sufficiently effective can not be utilized, and the stockyard of large area can only be relied on to stack, and be occupied a large amount of
Soil, also causes serious pollution to environment.China currently carries out highway construction, it is necessary to material of largely building the road on a large scale
Material.But, as river course and environmental improvement are increasingly paid attention in various regions in recent years, large area forbids excavation Tu Chang, gravel and mountain area
The road-making materials such as building stones, many area soil, sand, stone are extremely short, and cost of building the road is significantly increased.Using red mud as each structure of road
The main material of layer, while some areas road-making material shortage problem is solved, minimizing and recycling to red mud
Also will be important breakthrough.
Although red mud is had into disclosed in lot of documents as the technology that road basement material is applied, due to
Or red mud is filling roadbed cannot to meet engineering objective requirement, or environmental protection index requirement cannot be met, its Pavement Design does not have yet
There are corresponding design parameter, index to refer to and follow, real popularization and application is difficult in real road process of deployment.
And, in the prior art yet without red mud and red mud stabilization gravel as asphalt pavement structure basic unit and the complete paving of underlayment
Assembling structure, constrains minimizing and the recycling of red mud.
The content of the invention
Technical assignment of the invention is directed to above-mentioned the deficiencies in the prior art, there is provided a kind of red mud and red mud stabilization gravel group
Box-like basic unit's pavement structure, the pavement structure makes full use of the modified underlayment of red mud excellent with red mud stabilized macadam base rigidity complementation
Gesture, is combined by Rational structure, realizes application of the industrial residue red mud in road surface structure basic unit and underlayment, is used
Combined base structure improve the rigidity uniformity of sub-surface, reduce traditional semi-rigid asphalt pavement cracking, purt
The diseases such as slurry, while industrial waste red mud recycling is realized, improve the service life of asphalt pavement structure.
Red mud of the present invention refers to that aluminium industry extracts the contaminative waste residue discharged during aluminum oxide, it is generally the case that stockyard
More than 30%, simple considers that red mud is mainly made up of fines from Geotechnical Engineering angle to the water content of red mud, 10 μm~
More than 60%, with similar to viscous soil characteristics, red mud is presented high dispersive colloidal to 100 μm of grain group contents under nature
State, its high-moisture and low-density make its void ratio be up to 1.85~2.40, and this is also extremely rare, but red for mud
The composition and the origin cause of formation of mud are entirely different with mud, and property also differs greatly.It is therefore contemplated that red mud is a kind of low severe, height
Void ratio, high-consistency, high ph-values belong to high liquid limit clay in strong basicity.
Technical assignment of the invention is realized in the following manner：A kind of red mud and red mud stabilization gravel Combined base road
Face structure, is characterized in including asphalt structure sheaf, changed red mud stabilized macadam base, changed red mud underlayment, pitch
Mixture structure layer, changed red mud stabilized macadam base and changed red mud underlayment are laid on soil matrix from top to bottom.
In order to ensure that changed red mud underlayment has good pavement performance, can be filled in the red mud of changed red mud underlayment
Modifying agent.Preferably, the modifying agent is formed by ardealite, slag micropowder and cement mixing, ardealite, slag micropowder, water
Mud, the mass ratio of red mud are 1-2:20-25:70-80:500.When the mass ratio of ardealite, slag micropowder, cement, red mud is
1.3-1.7:21-23:73-77:When 500, best-of-breed technology effect can be reached.
The thickness of changed red mud underlayment is preferably 15cm~20cm.
In order to ensure that changed red mud stabilized macadam base has good environmental-protecting performance, its strong basicity is reduced, can changed
Modifying agent is filled in the red mud of property red mud stabilized macadam base.Preferably, the modifying agent is by ardealite, slag micropowder and water
Mud is mixed, and ardealite, slag micropowder, cement, red mud, the mass ratio of rubble are 0.3-0.5:5-7:50-70:110-130:
940, also, when the mass ratio of ardealite, slag micropowder, cement, red mud, rubble is 0.3-0.5:5.5-6.5:55-65:115-
125:Optimal technique effect can be reached when 940.
Further, the macadam gradating scope of changed red mud stabilized macadam base, standard size is passed through with each particle diameter mineral aggregate
Sieve aperture percentage, preferably：
26.5mm, 95%~100%；19mm, 47%~67%；9.5mm, 23%~33%；4.75mm, 12%~
22%；2.36mm, 7%~17%；0.6mm, 0%~7%；0.075mm, 0%~6%.
The thickness of changed red mud stabilized macadam base is preferably 30~40cm, and preferably a point two-layer is constructed, thickness in monolayer model
Enclose 15cm~20cm.
In changed red mud stabilized macadam base and changed red mud underlayment, the ardealite is used to reduce the alkalescence of red mud；
The slag micropowder is used to excite the strength character of red mud compound；Cement is used to form strength stability steady in a long-term.Cause
This, above-mentioned modifying agent is added in red mud, can effectively meet the stability of roadbase, improves the length of Pavement Base Structure
Phase performance.
The asphalt structure sheaf can select any one asphalt structure sheaf in the prior art, but in order to
Changed red mud stabilized macadam base preferably coordinates, and asphalt structure sheaf of the present invention is preferably by under asphalt uplayer, pitch
Surface layer, macrovoid drainage asphalt metalling, heated bitumen crushed stone sealing are constituted, and asphalt structure sheaf is by asphalt uplayer, drip
Blue or green cutting optimal, macrovoid drainage asphalt metalling, heated bitumen crushed stone sealing are laid on changed red mud stabilization gravel base from top to bottom
On layer.
Asphalt uplayer is preferably SMA-13 or AC-13, and it is PG76-22 to use pitch PG grades, and thickness is 3-5cm；
Pitch cutting optimal is preferably AC-20, and it is PG64-22 or PG76-22 to use pitch PG grades, and thickness is 5-7cm.
Heated bitumen crushed stone sealing is preferably PG64-22 or PG76-22 using pitch PG grades
Preferably, it is PG64-22 or PG76-22 that macrovoid drainage asphalt metalling uses pitch PG grades, hole is designed
Gap rate is 12%~16%, and thickness is 10-20cm, is PG64-22 when macrovoid drainage asphalt rubble uses pitch PG grades, heat
Mixing asphalt outer need to mix 0.5~1.5% lignin fibre.
The outer volume of lignin fibre is preferably 1%.
The macadam gradating scope of macrovoid drainage asphalt metalling, standard size sieve aperture percentage is passed through with each particle diameter mineral aggregate
Meter, preferably：
31.5mm, 93%~100%；19mm, 60%~75%；9.5mm, 25%~38%；1.18mm, 0~10%；
0.075mm, 0~3%.
Compared with prior art, red mud of the invention and red mud stabilization gravel Combined base pavement structure have following prominent
Go out ground beneficial effect：
(1) addition particular modification agent, can effectively improve the long-time stability of road, reducing the contaminative of roadbed.Add
After above-mentioned Special modifier, the detection Leaching of Heavy Metals concentration total mercury index of changed red mud indoor sample<0.001mg/L, six
Valency chromium index<0.05mg/L, meets the class of underground water III control standard so that the pavement structure ensure red mud as roadbase and
Underlayment can meet engineering objective requirement, and environmental requirement can be met again, realize minimizing, the resource profit of industrial residue red mud
With；
(2) red mud and red mud stabilization gravel Combined base structure improves sub-surface and the rigidity of underlayment is uniform
Property, the diseases such as cracking, purt slurry are prevented, improve the structure service life of semi-rigid type base.
(3) pavement structure prevents Pavement Structure Damage by Water using the layer combination of drainage crack resistance bituminous texture, extends
Pavement structure overall structure service life.
Brief description of the drawings
Accompanying drawing 1 is red mud and red mud stabilization gravel Combined base pavement structure.
Specific embodiment
With reference to Figure of description with specific embodiment to red mud of the invention and red mud stabilization gravel Combined base road surface
Structure is described in detail below.
【Embodiment】
As shown in Figure 1, the red mud of the present embodiment and red mud stabilization gravel Combined base pavement structure：4cmSMA-13
Asphalt 1+6cmAC-20 asphalt 2+12cm macrovoid drainage asphalt rubble 3+ heated bitumen crushed stone sealings 4+18cm
Basic unit 5+18cm changed red mud stabilization gravels are gone to a grassroots level 6+20cm changed red mud underlayment 7+ soil matrixs on changed red mud stabilization gravel
8。
1st, changed red mud underlayment 7
It is main pavement material with red mud, the mixture with ardealite, slag micropowder and cement is as modifying agent.
It is 1.5 by mass ratio:22:75:After 500 ardealite, slag micropowder, cement, red mud are well mixed, in soil matrix 8
On carry out the laying (a layer construction) of changed red mud underlayment 7.
2nd, changed red mud stabilized macadam base (go to a grassroots level basic unit on 6, changed red mud stabilization gravel by changed red mud stabilization gravel
5)
With each particle diameter mineral aggregate by standard size sieve aperture percentage, macadam gradating scope：
26.5mm, 97%；19mm, 58%；9.5mm, 30%；4.75mm, 17%；2.36mm, 13%；0.6mm, 4%；
0.075mm, 3%.
Cementitious matter：With red mud as major ingredient, mixed by modifying agent of the mixture of ardealite, slag micropowder and cement,
Ardealite, slag micropowder, cement, red mud, the mass ratio of rubble are 0.4:6:60:120:940.
Changed red mud stabilized macadam base gross thickness is 36cm, point two-layer construction.
3rd, heated bitumen crushed stone sealing 4
It is PG64-22 that heated bitumen crushed stone sealing uses pitch PG grades.
4th, macrovoid drainage asphalt rubble 3
Pitch PG grade PG76-22, mix mass percent for 1% lignin fibre outside hot-mix asphalt mixture；
Design porosity is 15%；
With each particle diameter mineral aggregate by standard size sieve aperture percentage, the level of rubble is with being：
31.5mm, 95%；19mm, 70%；9.5mm, 30%；1.18mm, 5%；0.075mm, 2%.
5th, pitch cutting optimal 2
Using AC-20 compounds, pitch PG grades are PG64-22.
6th, asphalt uplayer 1
Using SMA-13 compounds, pitch PG grades are PG76-22.
【Experimental example】
With roadbed red mud and the above-mentioned changed red mud underlayment for being added with modifying agent as experimental subjects, major project and environment
Index is contrasted：
Claims (10)
1. a kind of red mud and red mud stabilization gravel Combined base pavement structure, it is characterised in that：Including asphalt structure
Layer, changed red mud stabilized macadam base, changed red mud underlayment, asphalt structure sheaf, changed red mud stabilized macadam base
It is laid on soil matrix from top to bottom with changed red mud underlayment.
2. red mud according to claim 1 and red mud stabilization gravel Combined base pavement structure, it is characterised in that：It is modified
Admixture has modifying agent in the red mud of red mud underlayment, and the modifying agent is formed by slag micropowder, ardealite and cement mixing, phosphorus stone
Cream, slag micropowder, cement, the mass ratio of red mud are 1-2:20-25:70-80:500.
3. red mud according to claim 2 and red mud stabilization gravel Combined base pavement structure, it is characterised in that：It is modified
Thickness range 15cm~the 20cm of red mud underlayment.
4. red mud according to claim 1 and red mud stabilization gravel Combined base pavement structure, it is characterised in that：It is modified
Admixture has modifying agent in the red mud of red mud stabilized macadam base, and the modifying agent is by ardealite, slag micropowder and cement mixing
Into ardealite, slag micropowder, cement, red mud, the mass ratio of rubble are 0.3-0.5:5-7:50-70:110-130:940.
5. red mud according to claim 4 and red mud stabilization gravel Combined base pavement structure, it is characterised in that：It is modified
The macadam gradating scope of red mud stabilized macadam base, with each particle diameter mineral aggregate by standard size sieve aperture percentage, be：
26.5mm, 95%~100%；19mm, 47%~67%；9.5mm, 23%~33%；4.75mm, 12%~22%；
2.36mm, 7%~17%；0.6mm, 0%~7%；0.075mm, 0%~6%.
6. red mud according to claim 4 and red mud stabilization gravel Combined base pavement structure, it is characterised in that：It is modified
The thickness range of red mud stabilized macadam base is 30~40cm, point two-layer construction, thickness in monolayer scope 15cm~20cm.
7. red mud according to claim 1 and red mud stabilization gravel Combined base pavement structure, it is characterised in that：Pitch
Mixture structure layer is made up of asphalt uplayer, pitch cutting optimal, macrovoid drainage asphalt metalling, heated bitumen crushed stone sealing,
Asphalt structure sheaf by asphalt uplayer, pitch cutting optimal, macrovoid drainage asphalt metalling, heated bitumen crushed stone sealing from
It is laid on changed red mud stabilized macadam base under above.
8. red mud according to claim 7 and red mud stabilization gravel Combined base pavement structure, it is characterised in that：Pitch
Upper layer is SMA-13 or AC-13, and it is PG76-22 to use pitch PG grades, and thickness is 3-5cm；
Pitch cutting optimal is AC-20, and it is PG64-22 or PG76-22 to use pitch PG grades, and thickness is 5-7cm.
9. red mud according to claim 7 and red mud stabilization gravel Combined base pavement structure, it is characterised in that：Macropore
It is PG64-22 or PG76-22 that gap drainage asphalt metalling uses pitch PG grades, and design porosity is 12%~16%, thickness
It is 10-20cm, is PG64-22 when macrovoid drainage asphalt rubble uses pitch PG grades, hot-mix asphalt mixture outer need to mixes 0.5
~1.5% lignin fibre.
10. red mud according to claim 7 and red mud stabilization gravel Combined base pavement structure, it is characterised in that：Heat
It is PG64-22 or PG76-22 that bitumen macadam seal coat uses pitch PG grades.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710071278.1A CN106676999B (en) | 2017-02-09 | 2017-02-09 | Red mud and broken stone combination formula basic unit road surface structure is stabilized to red mud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710071278.1A CN106676999B (en) | 2017-02-09 | 2017-02-09 | Red mud and broken stone combination formula basic unit road surface structure is stabilized to red mud |
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| CN106676999B CN106676999B (en) | 2022-06-14 |
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Cited By (8)
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| CN109020461A (en) * | 2018-09-03 | 2018-12-18 | 山西云泉岩土工程科技股份有限公司 | A kind of red mud sill for roadbed steady layer of water |
| CN109338843A (en) * | 2018-11-26 | 2019-02-15 | 山东省交通科学研究院 | A kind of gold tailings base underloading pavement of road paving structure |
| CN110219217A (en) * | 2019-06-19 | 2019-09-10 | 山东省交通科学研究院 | A kind of Bituminous stabilized silt base light traffic pavement structure |
| CN111153664A (en) * | 2020-01-13 | 2020-05-15 | 北京工业大学 | Road base material produced by stabilizing waste concrete building waste aggregate with lime red mud |
| CN111892373A (en) * | 2020-08-10 | 2020-11-06 | 山东省交通科学研究院 | Cementitious cold-mix cold-spread asphalt mixture and preparation method thereof |
| CN112225513A (en) * | 2020-09-10 | 2021-01-15 | 广东同创科鑫环保有限公司 | Red mud-based highway base material |
| CN113754398A (en) * | 2021-09-18 | 2021-12-07 | 湖北昌耀新材料工程技术研究有限责任公司 | Modified phosphogypsum stabilized macadam and preparation method and application thereof |
| CN116479698A (en) * | 2023-06-21 | 2023-07-25 | 湖南大学 | Roadbed structure based on construction waste and construction method thereof |
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| CN111153664B (en) * | 2020-01-13 | 2022-01-28 | 北京工业大学 | Road base material produced by stabilizing waste concrete building waste aggregate with lime red mud |
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| CN112225513A (en) * | 2020-09-10 | 2021-01-15 | 广东同创科鑫环保有限公司 | Red mud-based highway base material |
| CN113754398A (en) * | 2021-09-18 | 2021-12-07 | 湖北昌耀新材料工程技术研究有限责任公司 | Modified phosphogypsum stabilized macadam and preparation method and application thereof |
| CN116479698A (en) * | 2023-06-21 | 2023-07-25 | 湖南大学 | Roadbed structure based on construction waste and construction method thereof |
| CN116479698B (en) * | 2023-06-21 | 2023-09-15 | 湖南大学 | Roadbed structure based on construction waste and construction method thereof |
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