CN106676999B - Red mud and broken stone combination formula basic unit road surface structure is stabilized to red mud - Google Patents
Red mud and broken stone combination formula basic unit road surface structure is stabilized to red mud Download PDFInfo
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- CN106676999B CN106676999B CN201710071278.1A CN201710071278A CN106676999B CN 106676999 B CN106676999 B CN 106676999B CN 201710071278 A CN201710071278 A CN 201710071278A CN 106676999 B CN106676999 B CN 106676999B
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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
Abstract
The invention discloses a red mud and red mud stabilized macadam combined 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 layer and a modified red mud base layer, wherein the asphalt mixture structure layer, the modified red mud stabilized macadam base layer and the modified red mud base layer are paved on a soil base from top to bottom. The invention fully utilizes the complementary advantages of the rigidity of the red mud modified subbase layer and the red mud stabilized macadam base layer, forms a novel pavement structure through reasonable structural combination, realizes the application of industrial waste residues and red mud in the pavement structure base layer and the subbase layer, improves the rigidity uniformity of the pavement base layer by adopting the combined base layer structure, reduces the diseases such as cracking, slubbing and the like of the traditional semi-rigid base layer asphalt pavement, realizes the resource utilization of industrial waste red mud, and prolongs the service life of the structure of the asphalt pavement.
Description
Technical Field
The invention relates to the field of road engineering, in particular to a combined base pavement structure of red mud and red mud stabilized macadam.
Background
The red mud is polluting waste residue discharged when aluminum oxide is extracted in the aluminum industry, and generally 1.0-2.0 tons of red mud are additionally generated when 1 ton of aluminum oxide is produced on average. The red mud produced in the world is about 7000 million tons, and the red mud produced in China is more than 3000 million tons every year. At present, a large amount of red mud cannot be fully and effectively utilized, and can only be stacked by a large-area yard, thereby occupying a large amount of land and causing serious pollution to the environment. At present, China is carrying out highway construction on a large scale and needs a large amount of road building materials. However, with the increasing importance of river channels and environmental governance in recent years, large-area excavation of earth-moving fields, gravels and mountain stones is prohibited, and road building materials such as soil, sand and stones in many areas are in short supply, and the road building cost is greatly increased. The red mud is used as a main material of each structural layer of the road, so that the problem of shortage of road building materials in partial areas is solved, and the reduction and resource utilization of the red mud are a major breakthrough.
Although the technology of applying red mud as a road base material is disclosed in a large number of documents, the red mud filled roadbed can not meet the requirements of engineering indexes or environmental protection indexes, and the pavement design of the roadbed has no corresponding design parameters and indexes which can be referred and followed, so that the actual popularization and application of the roadbed is difficult to realize in the actual road paving process. Moreover, in the prior art, no complete pavement structure of the base course and the subbase layer of the asphalt pavement structure made of the red mud and the red mud stabilized macadam exists, so that the reduction and resource utilization of the red mud are restricted.
Disclosure of Invention
The technical task of the invention is to provide a red mud and red mud stabilized macadam combined base pavement structure aiming at the defects of the prior art, the pavement structure fully utilizes the rigidity complementary advantage of the red mud modified base course and the red mud stabilized macadam base course, the application of industrial waste residue red mud in the base course and the base course of the pavement structure is realized through reasonable structural combination, the adopted combined base course structure improves the rigidity uniformity of the pavement base course, reduces the defects of cracking, slubbing and the like of the traditional semi-rigid base course asphalt pavement, and improves the service life of the asphalt pavement structure while realizing the resource utilization of industrial waste red mud.
The red mud refers to polluting waste residues discharged during extraction of alumina in the aluminum industry, the water content of the red mud in a storage yard is over 30% in general, the red mud mainly comprises ultrafine particles from the viewpoint of geotechnical engineering, the content of the 10-100 mu m particles is over 60%, the red mud has the characteristic similar to that of clay, the red mud is in a high-dispersion colloid state in a natural state, the porosity ratio of the red mud is up to 1.85-2.40 due to the high water content and the low density of the red mud, the mud is rare, but the components and the causes of the red mud are completely different from those of the mud, and the properties of the red mud are far away. Therefore, the red mud is considered to be a high-liquid-limit clay with low weight, high porosity ratio, high consistency and high pH value and strong basicity.
The technical task of the invention is realized by the following modes: the red mud and red mud stabilized macadam combined base pavement structure is characterized by comprising an asphalt mixture structural layer, a modified red mud stabilized macadam base layer and a modified red mud subbase layer, wherein the asphalt mixture structural layer, the modified red mud stabilized macadam base layer and the modified red mud subbase layer are paved on a soil base from top to bottom.
In order to ensure that the modified red mud underlayer has good pavement performance, a modifier can be doped in the red mud of the modified red mud underlayer. Preferably, the modifier is formed by mixing phosphogypsum, slag micro powder and cement, and the mass ratio of the phosphogypsum to the slag micro powder to the cement to the red mud is 1-2:20-25:70-80: 500. When the mass ratio of the phosphogypsum to the slag micro powder to the cement to the red mud is 1.3-1.7:21-23:73-77:500, the optimal technical effect can be achieved.
The thickness of the modified red mud underlayer is preferably 15 cm-20 cm.
In order to ensure that the modified red mud stabilized macadam foundation has good environmental protection performance and reduce strong basicity, a modifier can be doped in the red mud of the modified red mud stabilized macadam foundation. Preferably, the modifier is formed by mixing phosphogypsum, slag micro powder and cement, the mass ratio of the phosphogypsum to the slag micro powder to the cement to the red mud to the broken stone is 0.3-0.5:5-7:50-70:110-130:940, and the best technical effect can be achieved when the mass ratio of the phosphogypsum to the slag micro powder to the cement to the red mud to the broken stone is 0.3-0.5:5.5-6.5:55-65:115-125: 940.
Further, the graded range of the crushed stone of the modified red mud stabilized crushed stone base is preferably as follows according to the percentage of the mineral aggregate with each particle size passing through the sieve pores with standard sizes:
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 the modified red mud stabilized macadam base is preferably 30-40 cm, the modified red mud stabilized macadam base is preferably constructed in two layers, and the thickness of a single layer ranges from 15cm to 20 cm.
In the modified red mud stabilized macadam base layer and the modified red mud subbase layer, the phosphogypsum is used for reducing the alkalinity of the red mud; the slag micro powder is used for exciting the strength performance of the red mud mixture; the cement is used to form a long-term stable strength stability. Therefore, the modifier is added into the red mud, so that the stability of the road base layer can be effectively met, and the long-term performance of the pavement base layer structure is improved.
The asphalt mixture structure layer can be any asphalt mixture structure layer in the prior art, but in order to be better matched with the modified red mud stabilized macadam base layer, the asphalt mixture structure layer preferably consists of an asphalt upper surface layer, an asphalt lower surface layer, a macroporous drainage asphalt macadam layer and a hot asphalt macadam seal layer, and the asphalt mixture structure layer is paved on the modified red mud stabilized macadam base layer from top to bottom by the asphalt upper surface layer, the asphalt lower surface layer, the macroporous drainage asphalt macadam layer and the hot asphalt seal layer.
The upper layer of the asphalt is preferably SMA-13 or AC-13, the PG grade of the asphalt is PG76-22, and the thickness of the asphalt is 3-5 cm;
the asphalt lower layer is preferably AC-20, and adopts asphalt PG grade of PG64-22 or PG76-22, and the thickness is 5-7 cm.
The heat asphalt macadam seal coat adopts asphalt PG grade preferably PG64-22 or PG76-22
Preferably, the large-pore drainage asphalt gravel layer adopts asphalt with PG (pitch grade) of PG64-22 or PG76-22, the designed porosity is 12% -16%, the thickness is 10-20cm, and when the large-pore drainage asphalt gravel adopts asphalt with PG grade of PG64-22, the hot-mixed asphalt mixture needs to be doped with 0.5-1.5% of lignin fiber.
The preferable doping amount of the lignin fiber is 1%.
The broken stone grading range of the macroporous drainage asphalt gravel layer is preferably as follows according to the percentage that mineral aggregates with various particle sizes pass through sieve pores with standard sizes:
31.5mm，93％～100％；19mm，60％～75％；9.5mm，25％～38％；1.18mm，0～10％；0.075mm，0～3％。
compared with the prior art, the red mud and red mud stabilized macadam combined base pavement structure has the following outstanding beneficial effects:
the addition of a specific modifier can effectively improve the long-term stability of the road and reduce the pollution of the roadbed. After the special modifier is added, the total mercury index and the hexavalent chromium index of the detected heavy metal leaching concentration of an indoor sample of the modified red mud are less than 0.001mg/L and less than 0.05mg/L, and the III-class control standard of underground water is met, so that the pavement structure ensures that the red mud serving as a road base layer and a subbase layer can meet the engineering index requirements and the environmental protection requirements, and the reduction and resource utilization of the industrial waste residue red mud are realized;
and secondly, the rigidity uniformity of the pavement base and the subbase is improved by the combined base structure of the red mud and the red mud stabilized macadam, the diseases such as cracking, slurry pumping and the like are prevented, and the service life of the structure of the semi-rigid base is prolonged.
And (III) the pavement structure adopts the drainage anti-crack asphalt structure layer combination, so that the water damage of the pavement structure is prevented, and the service life of the overall structure of the pavement structure is prolonged.
Drawings
Figure 1 is a combined base pavement structure of red mud and red mud stabilized macadam.
Detailed Description
The red mud and red mud stabilized macadam combined base pavement structure of the present invention will be described in detail below with reference to the accompanying drawings as specific examples.
[ examples ] A method for producing a compound
As shown in fig. 1, the red mud and red mud stabilized macadam combined base pavement structure of the embodiment: 4cm SMA-13 asphalt mixture 1+6cm AC-20 asphalt mixture 2+12cm macropore drainage asphalt macadam 3+ heat asphalt macadam seal 4+18cm modified red mud stabilized macadam upper base layer 5+18cm modified red mud stabilized macadam lower base layer 6+20cm modified red mud subbase layer 7+ soil base 8.
1. Modified red mud sub-base 7
The red mud is used as a main paving material, and a mixture of phosphogypsum, slag micro powder and cement is used as a modifier.
Uniformly mixing phosphogypsum, slag micropowder, cement and red mud in a mass ratio of 1.5:22:75:500, and paving (constructing one layer) the modified red mud subbase 7 on the soil foundation 8.
2. Modified red mud stabilized macadam foundation (modified red mud stabilized macadam lower foundation 6, modified red mud stabilized macadam upper foundation 5)
The crushed stone grading range is calculated by the percentage of the mineral aggregate with each particle size passing through a standard size sieve pore:
26.5mm，97％；19mm，58％；9.5mm，30％；4.75mm，17％；2.36mm，13％；0.6mm，4％；0.075mm，3％。
cementing materials: the red mud is used as a main material, a mixture of phosphogypsum, slag micro powder and cement is used as a modifier, and the mass ratio of the phosphogypsum to the slag micro powder to the cement to the red mud to the broken stone is 0.4:6:60:120: 940.
The total thickness of the modified red mud stabilized macadam foundation is 36cm, and construction is carried out in two layers.
3. Hot asphalt macadam seal 4
The hot asphalt macadam seal coat adopts asphalt with PG grade of PG 64-22.
4. Macroporous drainage asphalt macadam 3
PG (asphalt) grade PG76-22, wherein the mass percent of the doped lignin fiber of the hot-mix asphalt mixture is 1%;
the design porosity is 15%;
the graded broken stone is calculated by the percentage of the standard size sieve pores of mineral aggregates with various particle diameters:
31.5mm，95％；19mm，70％；9.5mm，30％；1.18mm，5％；0.075mm，2％。
5. asphalt lower surface layer 2
The AC-20 mixture is adopted, and the PG grade of the asphalt is PG 64-22.
6. Asphalt top layer 1
The SMA-13 mixture is adopted, and the PG grade of the asphalt is PG 76-22.
[ Experimental example ]
Taking roadbed red mud and the modified red mud subbase layer added with the modifier as experimental objects, and comparing main engineering indexes with environmental indexes:
Claims (5)
1. the utility model provides a rubble combination formula basic unit road surface structure is stabilized to red mud and red mud which characterized in that: comprises an asphalt mixture structure layer, a modified red mud stabilized macadam base layer and a modified red mud base layer, wherein the asphalt mixture structure layer, the modified red mud stabilized macadam base layer and the modified red mud base layer are paved on a soil base from top to bottom,
the red mud of the modified red mud subbase layer is doped with a modifier, the modifier is formed by mixing slag micro powder, phosphogypsum and cement, and the mass ratio of the phosphogypsum to the slag micro powder to the cement to the red mud is 1-2:20-25:70-80: 500;
the red mud of the modified red mud stabilized macadam foundation is doped with a modifier, the modifier is formed by mixing phosphogypsum, slag micro powder and cement, the mass ratio of the phosphogypsum to the slag micro powder to the cement to the red mud to the macadam is 0.3-0.5:5-7:50-70: 110-:
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 asphalt mixture structure layer is composed of an asphalt upper surface layer, an asphalt lower surface layer, a large-pore drainage asphalt gravel layer and a hot asphalt gravel seal layer, the asphalt mixture structure layer is formed by paving the asphalt upper surface layer, the asphalt lower surface layer, the large-pore drainage asphalt gravel layer and the hot asphalt gravel seal layer on the modified red mud stabilized gravel base layer from top to bottom, the asphalt mixture structure layer adopts PG64-22 or PG76-22 grade asphalt, and the design porosity of the large-pore drainage asphalt gravel layer is 12% -16%.
2. The red mud and red mud stabilized macadam combined base pavement structure according to claim 1, wherein: the thickness range of the modified red mud underlayer is 15 cm-20 cm.
3. The red mud and red mud stabilized macadam combined base pavement structure according to claim 1, characterized in that: the thickness range of the modified red mud stabilized macadam base is 30-40 cm, construction is carried out in two layers, and the thickness range of a single layer is 15-20 cm.
4. The red mud and red mud stabilized macadam combined base pavement structure according to claim 1, characterized in that: the upper layer of the asphalt is SMA-13 or AC-13, the PG grade of the asphalt is PG76-22, and the thickness is 3-5 cm;
the lower surface layer of the asphalt is AC-20, and the thickness is 5-7 cm.
5. The red mud and red mud stabilized macadam combined base pavement structure according to claim 1, characterized in that: the thickness of the macroporous drainage asphalt macadam layer is 10-20cm, when the PG grade of the macroporous drainage asphalt macadam is PG64-22, 0.5-1.5% of lignin fiber needs to be doped in the hot-mix asphalt mixture.
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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 |
| CN110219217B (en) * | 2019-06-19 | 2021-03-02 | 山东省交通科学研究院 | Asphalt stabilized silt basic unit small traffic volume pavement structure |
| 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 |
| CN111892373B (en) * | 2020-08-10 | 2022-11-01 | 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 |
| CN113754398B (en) * | 2021-09-18 | 2022-11-08 | 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 |
| CN116479698B (en) * | 2023-06-21 | 2023-09-15 | 湖南大学 | Roadbed structure based on construction waste and construction method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101046408B1 (en) * | 2010-07-07 | 2011-07-05 | 김문훈 | A admixture with red mud, structure for concrete pavement and method for it |
| CN202865716U (en) * | 2012-08-07 | 2013-04-10 | 甘肃土木工程科学研究院 | Modified bituminous mixture pavement |
| CN103741570A (en) * | 2013-12-18 | 2014-04-23 | 山东省交通科学研究所 | Asphalt pavement paving method achieving quick construction and forming |
| CN204000529U (en) * | 2014-08-25 | 2014-12-10 | 中铁十一局集团有限公司 | Engineering asphalt pavement structure |
| CN105693127A (en) * | 2016-03-15 | 2016-06-22 | 程钰 | Curing agent special for Bayer process red mud roadbeds and preparation method and application method thereof |
| CN206625101U (en) * | 2017-02-09 | 2017-11-10 | 山东省交通科学研究院 | A kind of red mud and red mud stabilization gravel Combined base pavement structure |
-
2017
- 2017-02-09 CN CN201710071278.1A patent/CN106676999B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101046408B1 (en) * | 2010-07-07 | 2011-07-05 | 김문훈 | A admixture with red mud, structure for concrete pavement and method for it |
| CN202865716U (en) * | 2012-08-07 | 2013-04-10 | 甘肃土木工程科学研究院 | Modified bituminous mixture pavement |
| CN103741570A (en) * | 2013-12-18 | 2014-04-23 | 山东省交通科学研究所 | Asphalt pavement paving method achieving quick construction and forming |
| CN204000529U (en) * | 2014-08-25 | 2014-12-10 | 中铁十一局集团有限公司 | Engineering asphalt pavement structure |
| CN105693127A (en) * | 2016-03-15 | 2016-06-22 | 程钰 | Curing agent special for Bayer process red mud roadbeds and preparation method and application method thereof |
| CN206625101U (en) * | 2017-02-09 | 2017-11-10 | 山东省交通科学研究院 | A kind of red mud and red mud stabilization gravel Combined base pavement structure |
Non-Patent Citations (1)
| Title |
|---|
| "赤泥道路材料的试验研究";齐建召;《中国优秀硕士学位论文全文数据库-工程科技Ⅱ期》;20060515;45-53页 * |
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