CN100339332C - Road surface based material by sintering red mud and construction method thereof - Google Patents
Road surface based material by sintering red mud and construction method thereof Download PDFInfo
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- CN100339332C CN100339332C CNB2005100451539A CN200510045153A CN100339332C CN 100339332 C CN100339332 C CN 100339332C CN B2005100451539 A CNB2005100451539 A CN B2005100451539A CN 200510045153 A CN200510045153 A CN 200510045153A CN 100339332 C CN100339332 C CN 100339332C
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- 238000005245 sintering Methods 0.000 title claims abstract description 42
- 239000000463 material Substances 0.000 title claims abstract description 41
- 238000010276 construction Methods 0.000 title abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 45
- 239000010881 fly ash Substances 0.000 claims abstract description 16
- 239000004571 lime Substances 0.000 claims abstract description 15
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 14
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000000654 additive Substances 0.000 claims description 17
- 230000000996 additive effect Effects 0.000 claims description 17
- 150000001875 compounds Chemical class 0.000 claims description 16
- 238000007493 shaping process Methods 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 239000004615 ingredient Substances 0.000 claims description 9
- 238000009826 distribution Methods 0.000 claims description 8
- 239000008187 granular material Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 239000003583 soil stabilizing agent Substances 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 5
- 238000013467 fragmentation Methods 0.000 claims description 3
- 238000006062 fragmentation reaction Methods 0.000 claims description 3
- 239000002932 luster Substances 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 claims description 3
- 229920006255 plastic film Polymers 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 2
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000002893 slag Substances 0.000 abstract description 2
- 238000009825 accumulation Methods 0.000 abstract 1
- 239000011499 joint compound Substances 0.000 description 79
- 239000002585 base Substances 0.000 description 9
- 239000000203 mixture Substances 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 7
- 238000004131 Bayer process Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000007710 freezing Methods 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000009991 scouring Methods 0.000 description 4
- 239000002956 ash Substances 0.000 description 3
- 238000012669 compression test Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 229910001570 bauxite Inorganic materials 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 235000011888 snacks Nutrition 0.000 description 2
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 244000070406 Malus silvestris Species 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
Classifications
-
- 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 road bed material made of red mud formed by a sintering method, which is prepared from the materials of the percentage by weight: 75% to 85% of red mud formed by a sintering method, 10% to 17% of fly ash, 5% to 15% of lime and 1% to 3% of admixture. The materials are proportionally mixed and used for constructing roads by a road mixing method. The present invention makes full use of red mud formed by a sintering method for constructing roads and provides a suitable rapid construction method; therefore, the present invention can be used for constructing road beds with high quality. The consumption of red mud is great; therefore, the present invention provides red mud formed by a sintering method with an effective way for comprehensive utilization, reduces the accumulation of red mud and protects the environment; red mud and other waste slag are used for constructing roads so as to reduce the cost for road construction. The road bed material made of red mud formed by a sintering method of the present invention can have high integral strength and high frost resistance, and is especially suitable for popularization and application in north China.
Description
Technical field
The present invention relates to a kind of road surface based material by sintering red mud and constructional method thereof, belong to the reutilization technology of red mud.
Background technology
Bauxite is handled through the alkali stripping, produces the strong basicity solid waste of crimson toner mud shape high-moisture remaining behind the aluminum oxide, is called red mud, and its composition and quantum of output are different because of ore grade, production method, state of the art.The Al of every production 1t
2O
3Approximately discharge red mud 1～1.5t.External most of aluminium manufacturer enters the ocean with red mud and disposes.Domestic aluminium manufacturer generally is in landlocked province, normally builds the stockyard and stores up.A large amount of red muds is owing to not being fully utilized and handling, take a large amount of soils for a long time, expend more stockyard and build and the maintenance management expense, and alkali waste polluted surface water, underground water source, cause natural ecological environment to destroy, and restricting the Sustainable development of aluminium industry.The comprehensive utilization of red mud becomes a global problem.
Developed both at home and abroad utilize red mud produce cement, preparation building materials, sintered ceramic, as comprehensive utilization techniques such as plastic fillers, yet most of technology is because to eat the quantity of slag little or less economical and do not put it over.Utilizing red mud is a kind of effective way of utilizing red mud on a large scale as pavement material.Reported in the document and did road basement material (Xie Yuan etc., " preparation of red mud road basement material and Study on Forming ", mining and metallurgy, 2002 (1): 4～7) after utilizing Pingguo, Guangxi aluminium Bayer process red mud solidified.Because bauxite grade, production method difference, Bayer process red mud and red mud from sintering process exist than big difference.The Bayer process red mud poor activity, though store up for a long time, but still be loose fine fraction earth material, need the solidifying agent of outer portion could form strength of stability, poor, the poor durability of relatively poor, the anti-water scouring capability of the anti-freezing property of this solidify material, fine-graded material uniform mixing generally adopt the center mixer field to mix the method construction.2CaOSiO in the red mud from sintering process
2The isoreactivity material is many, store up in the process caking easily, how to adopt other raw material and admixture excite red mud from sintering process activity, how to determine the red mud base material that the integrally curing performance is good, anti-freezing property is high, anti-water scouring capability is strong prescription, how the red mud to caking carries out fragmentation in road construction, how uniform mixing is the difficult point that red mud from sintering process is used as road surface base layer material.Because the proterties and the curing mechanism of red mud from sintering process are different fully with Bayer process red mud, determine red mud from sintering process as proportioning raw materials, form of construction work, the boulder yield of road surface base layer material control, the control of moisture is the key problem in technology of whole road surface based material by sintering red mud in the maintenance.
Summary of the invention
The object of the present invention is to provide a kind of road surface based material by sintering red mud, make full use of red mud from sintering process and build the road, the red mud consumption is big, and by suitable, constructional method fast is provided, can the high-quality roadbed of making.
Road surface based material by sintering red mud of the present invention, its ingredients by weight per distribution ratio is:
Red mud from sintering process 75%～85%
Flyash 10%～17%
Lime 5%～15%
External additive 1%～3%.
Wherein external additive is black liquid or terra alba.
The present invention is directed to different proterties of red mud from sintering process and curing mechanism, determined suitable batching composition by research, test, and black liquid and terra alba external additive, this external additive can excite the active substance in red mud and the flyash, improve early strength, obtain the red mud base material that the integrally curing performance is good, anti-freezing property is high, anti-water scouring capability is strong, make road surface based material by sintering red mud can stably reach the strength criterion of high-grade highway.
Become the basis with above-mentioned ingredient groups, suitable, the rapid constructing method of road surface based material by sintering red mud of the present invention adopt road-mix method, carry out according to the following step successively:
(1) red mud evenly is laid on good earth roadbed of compacting, mix and stir in advance 2 times with soil stabilizer, also can mix and stir several times more, the fragmentation of red mud piece, shop are spared, steamroller is 1～2 time again, put in order out 2% road camber then with motorized grader, mix and stir, roll in the process and sprinkle water, form the red mud layer;
(2) at red mud layer pave successively again flyash, lime and external additive, then, adopt soil stabilizer that compound is mixed and stirred 2 times again, utilize the broken red mud piece of blade of amalgamator high speed rotating on the one hand, guarantee the crushing effect of red mud piece, on the other hand red mud, flyash, lime and external additive are mixed, the red mud granule content of particle diameter＞20mm is controlled at below 10%, compound color and luster unanimity, and with watering;
(3) sprinkle water, roll, shaping, roll and form basic unit again, keep compound, carry out moisture-keeping maintaining at the substrate surface covered with plastic film at suitable agglomerative water ratio 45～48%.Curing time is generally at 6 days to 15 days, and is most of about 7 days.
After the compound uniform mixing, preferably,, reduce the situation of having a snack to expose the potential unfairness earlier with preliminary leveling of motorized grader and shaping as far as possible.
After shaping, use street roller in full-surfaced width, to roll, roll number of times and be no less than 6 times to compacting, design requirements: subbase 〉=95%, basic unit 〉=97%.Before rolling end, with the smooth again shaping of motorized grader once, make it vertically pleasantly.
Since the slow setting of red mud basic unit, close traffic between preserving period, and protection basic unit is not damaged.
Actual tests construction section situation:
According to the present invention finished domestic article one with red mud from sintering process as the building of the highway of road surface base layer material, i.e. sieve villages and small towns, Zichuan District, Zibo City Nan Shanlu of total length 4km.Through the on-the-spot core boring sampling of Zibo City traffic bureau, the performance of red mud road surface base layer material has reached the strength criterion (JTJ 034-2000) of expressway and Class I highway.
After the patent working of the present invention, compare, have the following advantages with existing road surface base layer material:
1, under the excitation of lime, flyash and a small amount of external additive, road surface based material by sintering red mud has higher bulk strength and anti-freezing property, be particularly suitable for applying in northern China, test specimen is 28d carries out five freeze-thaw cycle during the length of time after, still more than 3MPa, mass loss rate is 0.56% to ultimate compression strength.Itself does not have activity Bayer process red mud, is the solidification intensity that the outer solidifying agent that adds forms, and therefore, Bayer process red mud is as road surface base layer material anti-freezing property, anti-water scouring capability, poor durability.
2, road surface based material by sintering red mud provided by the invention wherein the red mud incorporation more than 75%; the red mud from sintering process that the technology of the present invention is piled up for domestic most alumina producers provides an effective comprehensive Utilization Ways; reduce red mud piling up, the protection environment.
3, under the condition of identical material shipment distance, the present invention utilizes waste residues such as red mud to build the road, and builds the road and compares with utilizing traditional road surface base layer material (as two-ash broken stones and cement stabilized soil etc.), and the cost of building the road is low.
4, utilize road surface based material by sintering red mud provided by the invention to build the road, its performance has reached the strength criterion of expressway and Class I highway, yet two traditional ashes, two-ash soil and two sand-limes are difficult to reach the requirement of strength of the basic unit of secondary and the above highway high grade pavement of secondary.
Embodiment
The invention will be further described below in conjunction with embodiment.
Embodiment 1
Road surface based material by sintering red mud of the present invention, its ingredients by weight per distribution ratio is:
Red mud from sintering process 75%
Flyash 15%
Lime 10%
Black liquid external additive 2%.
The road construction method is as follows:
(1) prepares red mud, flyash, terra alba and external additive raw material according to the batching proportioning, determine the wet feed pine shop density of various raw materials, calculate the loose laying depth of various materials;
(2) red mud is evenly paved in rolling on handle well earth roadbed by calculating loose laying depth, adopt soil stabilizer to mix and stir in advance 2 times, the bulk red mud is carried out precrushing; Steamroller 1～2 time is put in order out 2% road camber then with motorized grader, mix and stir, roll in the process and sprinkle water, and forms the red mud layer;
(3) pave successively on the red mud layer flyash, lime and external additive adopt soil stabilizer to mix and stir 2 times again, sprinkle water in the process of mixing and stirring, make the red mud granule content that mixes and stirs back particle diameter＞20mm be controlled to be 8%, reach design requirements, mix, compound color and luster unanimity;
(4) after the compound uniform mixing, with preliminary leveling of motorized grader and shaping,, reduce the situation of having a snack earlier to expose the potential unfairness as far as possible;
(5) after the shaping, in full-surfaced width, roll, roll number of times and be no less than 6 times, make compactness reach design requirements: subbase 〉=95%, basic unit 〉=97% with street roller.Before rolling end, flat eventually more once with motorized grader, make it vertically pleasantly;
(6) after construction finishes, carry out moisture-keeping maintaining at red mud substrate surface covered with plastic film, watering makes the compound water ratio 46%.Preserving period is 7 days, close traffic between preserving period.
By above-mentioned constructional method, maximum dry density is 1.25g/cm
3Detect compactness with core cutter method: basic unit is 98.5%, and subbase is 95.1%.Resistance to compression test specimen 7d compressive strength after immersion is 1.64MPa, reaches one-level motorway strength criterion.
Embodiment 2
Road surface based material by sintering red mud of the present invention, its ingredients by weight per distribution ratio is:
Red mud from sintering process 85%
Flyash 10%
Lime 5%
Terra alba external additive 3%.
The red mud granule content that the road construction method is mixed and stirred back particle diameter＞20mm is controlled to be 9%; After rolling, watering makes the compound water ratio carry out maintenance 45%, and other is with embodiment 1.
By above-mentioned constructional method, maximum dry density is 1.20g/cm
3Detect compactness with core cutter method: basic unit is 97.5%, and subbase is 95.2%.Resistance to compression test specimen 7d compressive strength after immersion is 0.9MPa, reaches one-level motorway strength criterion.
Embodiment 3
Road surface based material by sintering red mud of the present invention, its ingredients by weight per distribution ratio is:
Red mud from sintering process 75%
Flyash 15%
Lime 10%
Terra alba external additive 1%.
The red mud granule content that the road construction method is mixed and stirred back particle diameter＞20mm is controlled to be 8%; Watering makes the compound water ratio carry out maintenance 48%, and other is with embodiment 1.
By above-mentioned constructional method, maximum dry density is 1.25g/cm
3Detect compactness with core cutter method: basic unit is 98.5%, and subbase is 95.1%.Resistance to compression test specimen 7d compressive strength after immersion is 1.63MPa, reaches one-level motorway strength criterion.
Embodiment 4
Road surface based material by sintering red mud of the present invention, its ingredients by weight per distribution ratio is:
Red mud from sintering process 80%
Flyash 12%
Lime 8%
Black liquid external additive 2.5%.
The red mud granule content that the road construction method is mixed and stirred back particle diameter＞20mm is controlled to be 9%; Watering makes the compound water ratio carry out maintenance 47%, and other is with embodiment 1.
Embodiment 5
Road surface based material by sintering red mud of the present invention, its ingredients by weight per distribution ratio is:
Red mud from sintering process 82%
Flyash 12%
Lime 6%
Black liquid external additive 1.5%.
The red mud granule content that the road construction method is mixed and stirred back particle diameter＞20mm is controlled to be 7%; Watering makes the compound water ratio carry out maintenance 46%, and other is with embodiment 1.
Embodiment 6
Road surface based material by sintering red mud of the present invention, its ingredients by weight per distribution ratio is:
Red mud from sintering process 78%
Flyash 10%
Lime 12%
Terra alba external additive 2%.
The red mud granule content that the road construction method is mixed and stirred back particle diameter＞20mm is controlled to be 8%; Watering makes the compound water ratio carry out maintenance 47%, and other is with embodiment 1.
Claims (4)
1, a kind of road surface based material by sintering red mud is characterized in that its ingredients by weight per distribution ratio is:
Red mud from sintering process 75%～85%
Flyash 10%～17%
Lime 5%～15%
Black liquid or terra alba external additive 1%～3%.
2, the constructional method of road surface based material by sintering red mud according to claim 1 comprises batching, stone and rolls, and it is characterized in that carrying out according to the following step successively:
(1) red mud evenly is laid on good earth roadbed of compacting, mixes and stirs in advance 2 times with soil stabilizer, even the fragmentation of red mud piece, shop, steamroller is 1～2 time again, put in order out 2% road camber then with motorized grader, mix and stir, roll in the process and sprinkle water, form the red mud layer;
(2) at red mud layer pave successively again flyash, lime and external additive, then, adopt soil stabilizer that compound is mixed and stirred 2 times again, the red mud granule content of particle diameter＞20mm is controlled at below 10%, compound color and luster unanimity, and with watering;
(3) sprinkle water, roll, shaping, roll and form basic unit again, keep the compound water ratio, carry out moisture-keeping maintaining at the substrate surface covered with plastic film 45～48%.
3, constructional method according to claim 2, it is characterized in that the compound uniform mixing after, earlier with preliminary leveling of motorized grader and shaping.
4, constructional method according to claim 3, it is characterized in that shaping after, street roller rolls in full-surfaced width, rolls number of times and is no less than 6 times to compacting, before rolling end, with the smooth again shaping of motorized grader once.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100451539A CN100339332C (en) | 2005-11-09 | 2005-11-09 | Road surface based material by sintering red mud and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100451539A CN100339332C (en) | 2005-11-09 | 2005-11-09 | Road surface based material by sintering red mud and construction method thereof |
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| CN1792954A CN1792954A (en) | 2006-06-28 |
| CN100339332C true CN100339332C (en) | 2007-09-26 |
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Families Citing this family (14)
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| CN101671986B (en) * | 2009-08-11 | 2013-12-04 | 山西鑫秀工矿废渣利用有限公司 | Road material for producing red mud by using Bayer process |
| CN102535290B (en) * | 2012-02-28 | 2015-01-07 | 河南科技大学 | Method for curing red mud roadbed by using liquid red mud curing agent |
| CN103572680B (en) * | 2012-08-02 | 2016-01-20 | 五冶集团上海有限公司 | The roadbed filling construction method of coal mine gob |
| CN104961421A (en) * | 2015-05-28 | 2015-10-07 | 武汉德利保生态技术有限公司 | Red mud phosphogypsum hydraulic road base course, red mud phosphogypsum hydraulic road base course material and preparation method of red mud phosphogypsum hydraulic road base course material |
| CN105293968A (en) * | 2015-11-30 | 2016-02-03 | 马鞍山泓宇材料科技有限公司 | Phosphorus slag compound modifying agent |
| CN106498829B (en) * | 2016-10-26 | 2019-04-09 | 中国科学院地质与地球物理研究所 | A kind of processing method that pavement of road base is cured modified |
| CN107129214A (en) * | 2017-06-20 | 2017-09-05 | 合肥慧林建材有限公司 | A kind of composite road material and preparation method thereof |
| CN108640548A (en) * | 2018-07-06 | 2018-10-12 | 三明学院 | A kind of ground polymer material and preparation method thereof |
| CN110922081B (en) * | 2019-12-10 | 2021-10-15 | 徐州中联混凝土有限公司 | Treating agent for red mud, Bayer process red mud treatment method, concrete and building material |
| 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 |
| 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 |
| CN112342854A (en) * | 2020-09-23 | 2021-02-09 | 广东同创科鑫环保有限公司 | Construction method of red mud-based highway pavement base course |
| CN112279541B (en) * | 2020-09-23 | 2022-09-23 | 广东同创科鑫环保有限公司 | Red mud-based highway base material and preparation method thereof |
| CN113026459B (en) * | 2021-03-26 | 2022-12-02 | 济南通达公路工程有限公司 | Roadbed structure filled with industrial waste residues and red mud and construction method |
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