CN110451862A - A kind of modified phosphorus ore tailing roadbed filling and preparation method thereof - Google Patents
A kind of modified phosphorus ore tailing roadbed filling and preparation method thereof Download PDFInfo
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- CN110451862A CN110451862A CN201910830328.9A CN201910830328A CN110451862A CN 110451862 A CN110451862 A CN 110451862A CN 201910830328 A CN201910830328 A CN 201910830328A CN 110451862 A CN110451862 A CN 110451862A
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- ore tailing
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/001—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing unburned clay
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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- Ceramic Engineering (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
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- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
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Abstract
The present invention provides a kind of roadbed filling and preparation method thereof using alkaline residue and the composite modified phosphorus ore tailing of clay, belongs to roadbed filling technical field.The volume (calculating by dry mass) of the filler each component is respectively as follows: alkaline residue 10%~50%, and clay 25%~50%, remaining is phosphorus ore tailing, and clay volume must not exceed phosphorus ore tailing.Present invention proposition uses clay and alkaline residue to be modified as modifying agent to phosphorus ore tailing, mixture is set to be able to satisfy highway subgrade design specification requirement, its CBR value and unconfined compressive strength are high, consolidation effect is good, high financial profit, it solves the problems, such as that phosphorus ore tailing engineering properties is bad and solid waste material is difficult to efficiently use, meets the requirement of green ecological and sustainable development.
Description
Technical field
The invention belongs to roadbed filling technologies, more particularly to a kind of modified phosphorus ore tailing roadbed filling and its preparation side
Method.
Background technique
White solid waste material can be discharged using traditional ammonia-soda process soda ash in alkali factory in the process --- alkaline residue.Alkaline residue is stone
One of grey industrial residue, the stockpiling of alkaline residue make the soil property around place generate salination, and water body is contaminated, simultaneously because alkaline residue
Based on powder, it is easy to spread around box haul, it is very big to the air impact in city.
Phosphorite tailings sand is not reach the requirement of production phosphoric acid by wet process, by ore dressing in phosphorus ore raw ore recovery process
Superseded waste belongs to the mining industry solid waste in industrial solid castoff.At present China to the utilization rate of CHARACTERISTICS OF TAILINGS SAND compared with
Low, phosphorus ore tailing is generally all stacked in phosphorus Tailings Dam, occupies a large amount of land resource.Existing majority tailing dam seriously surpasses
Height, the well that collapses, dam-break accident take place frequently, and security risk is huge.
In recent years, national economy develops rapidly, and road project quantity sharply increases, it means that needs a large amount of road
Based filler.Gradually attention however as country to green ecological, most areas have been forbidden exploiting traditional crushed rock filler, caused
Road performance department can only buy crushed rock filler from the area such as Hunan, larger in the cost number of freight charges and purchase surface side filler,
This can be undoubtedly a huge financial burden.Increasingly lack in Traditional foundations filler and in the higher and higher situation of cost, by work
Industry waste becomes an option as roadbed filling, this not only suits this guiding of green traffic, also complies with China's energy conservation
This strategy of emission reduction.
The engineering properties of phosphorus ore tailing is bad, and sticky content is few, cementation is weak, plasticity is weak, shearing strength is low, globality
Poor, primary intensity is provided by internal friction.If clay is added in sand, since clay inherently has cohesiveness and sand
After mixing, the grain composition of two kinds of materials is improved, adhesive component is embedded between phosphorus CHARACTERISTICS OF TAILINGS SAND particle, CHARACTERISTICS OF TAILINGS SAND and clay
Contact surface increases, and keeps the mixture of sand and clay more closely knit, is formed by the whole of cohesive strength and internal friction shared intensity
Body, mixture can have the embedded glutinous cumulative power of similar sand, and strength and stability is improved.Alkaline residue contains largely
CaCO3, the CaCl of middle amount2, CaO and CaSO4, institute's calcium content and quick lime are almost the same, have ion exchange, pozzolanic reaction,
Ca needed for carbonation reaction and crystallization reaction2+, and can provide alkaline excitation environment makes clay discharge active silica, oxygen
Change aluminium sticking grain to promote the progress of pozzolanic reaction.Meanwhile alkaline residue specific surface area is bigger than quick lime, is conducive to promote above-mentioned physics
The abundant progress of chemical reaction.After a series of physical chemical action, the mixture of alkaline residue, clay and phosphorus ore tailing can be formed
A kind of excellent roadbed filling.
Summary of the invention
Goal of the invention: it is asked for what prior art environmental pollution and land seizure and current Traditional foundations filler lacked
Topic, the present invention provides the surplus value for giving full play to alkaline residue, phosphorus ore tailing both trade wastes, and process flow letter
Single, quality controllable composite modified phosphorus ore tailing roadbed filling and preparation method thereof.
Technical solution: a kind of modified phosphorus ore tailing roadbed filling of the present invention, including following mass percentage
Each component: alkaline residue 10%~50%, substrate 50%~90%, wherein the substrate by 25%~50% clay and 50%~
75% phosphorus ore tailing composition, above-mentioned mass percentage is in terms of dry weight.
Wherein, the alkaline residue is low liquid limit silt, and the phosphorus ore tailing is fine sand, and the clay is low liquid limit clay.
In the alkaline residue, silt content 50~60%, sticky content 10~20%, sand grain content 20~30%；The phosphorus
In mine tailings, sand grain content 70~80%, sticky content 10~15%, silt content 5~10%；In the clay, sand grains contains
Measure 1~3%, silt content 40~50%, sticky content 40~50%.Wherein, the alkaline residue is ammonia-soda process basic industry waste residue,
Its main chemical compositions is CaCO3、CaCl2And CaO, the phosphorus ore tailing are that ore dressing is discarded in the mining process for generate phosphoric acid
Slag.
The preparation method of the modified phosphorus ore tailing roadbed filling is that clay and phosphorus ore tailing are first mixed to form first and mixed
It closes object sand clay, alkaline residue and the first mixture sand clay is then mixed to form the second mixture, i.e., modified phosphorus ore tailing roadbed
Filler.
Specifically includes the following steps:
(1) alkaline residue, clay, phosphorus ore tailing are taken, is separately dried to moisture content less than 5%, pulverizes and sieves after rejecting impurity, In
Stirring evenly in blender keeps the porous media of each material uniform, takes each material sample measurement initial aqueous rate respectively, then
Sample is toasted and claims dry weight；
(2) phosphorus ore tailing and clay for taking step (1) to stir evenly respectively according to the proportion with dry weight is mixed to get
One mixture sand clay, stirring keep sand clay moisture content uniform, sand clay sample measurement initial aqueous rate are taken, then by sand clay
Sample baking claims dry weight；
(3) the sand clay of the alkaline residue and step (2) that take step (1) to stir evenly respectively according to the proportion with dry weight, is stirred
It mixes mixing, and adjusts moisture content, form the second composite modified phosphorus ore tailing of mixture alkaline residue clay, i.e., modified phosphorus ore tailing roadbed
Filler.
In step (1), is paved to alkaline residue, phosphorus ore tailing, clay using place, dries (environment temperature > 25 DEG C) drying, or
It is dry under the conditions of 50~65 DEG C of simulative natural air-dryings, or drying at a temperature of 100~150 DEG C, make its moisture content less than 5%.
In step (1), alkaline residue, clay, phosphorus ore tailing are crushed until without obvious bulky grain and mistake 2mm sieve.
In step (1) and step (2), every kind of material takes 10 parallel sample measurement moisture content using quartering, takes it flat
Mean value moisture content as a whole, sample point need to pave in material and be uniformly distributed in range, each 50~100g of sample.If Duplicate Samples
Data distribution is excessively discrete, stirs again, and repeats sampling operation, until data distribution degree of stability reaches engine request.
In step (1) and step (2), sample claims dry weight after toasting 10~12h in 105~120 DEG C of baking ovens.
In step (3), the second composite modified phosphorus ore tailing moisture content of mixture alkaline residue clay of adjustment is 11~16%, optimal
It is selected as 12%.
In step (3), the optimum moisture content of composite modified phosphorus ore tailing is according to " highway earthwork test rule " (JTGE40-
2007) it is determining to carry out compaction test to the second mixture for II -2 type compaction test method of weight.
The utility model has the advantages that being compared to the prior art, the application replaces conventional curing agents cement and stone using alkaline residue and clay
Ash, the modifying agent as phosphorus ore tailing.It is characterized in that material requested is industrial residue and clay, it is cheap, and modified effect
Fruit is good.The present invention can fill alkaline residue, phosphorus ore tailing and clay " turning waste into wealth " on the basis of using phosphorus ore tailing as skeleton
Divide the cohesive strength using clay itself, sand insert structure is formed, so that shearing strength is held jointly by cohesive strength and internal friction
The advantages of carrying on a shoulder pole, combining tailings and clay.On the basis of the above, alkaline residue is added, generates alkaline environment, discharges Ca2+Carry out ion
Exchange interaction, pozzolanic action etc. further strengthen the cementing properties between soil particle.This invention is alkaline residue, phosphorus ore tailing etc.
Large scale industry waste is laid a good foundation in the utilization of field of road, also extends to other lime industrial residues and tail
The regeneration of the wastes such as ore in sand form.
Detailed description of the invention
Fig. 1 is that phosphorus ore tailing and clay ratio are in the composite modified phosphorus ore tailing roadbed filling of alkaline residue clay of the invention
50:50, the tamping curve figure that alkaline residue volume is 10%, 20%, 30%, 40%, 50%；
Fig. 2 is that phosphorus ore tailing and clay ratio are in the composite modified phosphorus ore tailing roadbed filling of alkaline residue clay of the invention
75:25's, alkaline residue volume is 10%, 20%, 30%, 40%, 50% tamping curve figure；
Fig. 3 is that phosphorus ore tailing and clay ratio are 25 in the composite modified phosphorus ore tailing roadbed filling of alkaline residue clay of reference:
75, alkaline residue volume is 10%, 20%, 30%, 40%, 50% tamping curve figure；
Fig. 4 is the process flow chart of the preparation method of the composite modified phosphorus ore tailing roadbed filling of alkaline residue clay of the invention.
Specific embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
In order to measure influence of the content of alkaline residue and clay in Modified soil to Modified soil property, the test such as table 1 is taken
Proportion and optimum moisture content are improved.Embodiment preparation flow is as shown in Figure 4.
Embodiment 1
1) it is paved, is dried or under the conditions of 50~65 DEG C of simulative natural air-dryings using place to alkaline residue, phosphorus ore tailing, clay
Drying is dried at a temperature of 100~150 DEG C, and control moisture content reaches reduced levels (< 5%), then rejects impurity in material,
Dry alkaline residue, phosphorus ore tailing, clay are crushed respectively using pulverizer, stirred evenly；
2) no less than 10 Duplicate Samples measurement moisture content are taken using quartering to every kind of material in step 1), takes its average value
Moisture content as a whole, sample point need to be uniformly distributed, each 50~100g of sample, need to be in 105 DEG C~120 DEG C of baking oven after sampling
10~12h of interior baking weighing；
3) if step 2) Duplicate Samples data distribution is excessively discrete, stir again, and repeat step 2), until data distribution is steady
Determine degree and reaches engine request；
4) dry weight for calculating clay and phosphorus ore tailing that step 2) obtains, using phosphorus ore tailing as substrate, by clay dry weight
Clay is mixed into the first mixture i.e. sand clay (note: phosphorus ore tailing is also mixed with dry weight) with phosphorus ore tailing for 25% by volume,
The moisture content of each proportion sand clay mixture is measured, specific steps can refer to step 2)；
It 5) is 10% alkaline residue and first by alkaline residue dry weight volume using the sand clay mixture obtained in step 4) as substrate
Mixture sand clay progress second obtains the second mixture i.e. composite modified phosphorus ore tailing of alkaline residue clay after being mixed and stirred for uniformly
Mixture, measures the moisture content of the composite modified phosphorus ore tailing mixture of proportion alkaline residue clay, and specific steps can refer to step 2)；
6) II -2 type compaction test method is weighed to the second mixture according to " highway earthwork test rule " (JTGE40-2007)
Compaction test is carried out, determines that the optimum moisture content of the second mixture is 12%；
7) it controls each proportion modified material moisture content and reaches default moisture content 12% (as shown in table 1) roadbed can be obtained and fill out
Expect S1.
Embodiment 2
The present embodiment is for illustrating the composite modified phosphorus ore tailing roadbed filling of alkaline residue clay provided by the invention and its preparation
Method
It is carried out in the way of embodiment 1, but alkaline residue volume is 20% in the second mixture, presets moisture content in step 7
It is 13%, obtains roadbed filling S2.
Embodiment 3
The present embodiment is for illustrating the composite modified phosphorus ore tailing roadbed filling of alkaline residue clay provided by the invention and its preparation
Method
It is carried out in the way of embodiment 1, but alkaline residue volume is 30% in the second mixture, presets moisture content in step 7
It is 14%, obtains roadbed filling S3.
Embodiment 4
The present embodiment is for illustrating the composite modified phosphorus ore tailing roadbed filling of alkaline residue clay provided by the invention and its preparation
Method
It is carried out in the way of embodiment 1, but alkaline residue volume is 40% in the second mixture, presets moisture content in step 7
It is 15%, obtains roadbed filling S4.
Embodiment 5
The present embodiment is for illustrating the composite modified phosphorus ore tailing roadbed filling of alkaline residue clay provided by the invention and its preparation
Method
It is carried out in the way of embodiment 1, but alkaline residue volume is 50% in the second mixture, presets moisture content in step 7
It is 16%, obtains roadbed filling S5.
Embodiment 6
1) it is paved, is dried or under the conditions of 50~65 DEG C of simulative natural air-dryings using place to alkaline residue, phosphorus ore tailing, clay
Drying is dried at a temperature of 100~150 DEG C, and control moisture content reaches reduced levels (< 5%), then rejects impurity in material,
Dry alkaline residue, phosphorus ore tailing, clay are crushed respectively using pulverizer, stirred evenly；
2) no less than 10 Duplicate Samples measurement moisture content are taken using quartering to every kind of material in step 1), takes its average value
Moisture content as a whole, sample point need to be uniformly distributed, each 50~100g of sample, need to be in 105 DEG C~120 DEG C of baking oven after sampling
10~12h of interior baking weighing；
3) if step 2) Duplicate Samples data distribution is excessively discrete, stir again, and repeat step 2), until data distribution is steady
Determine degree and reaches engine request；
4) dry weight for calculating clay and phosphorus ore tailing that step 2) obtains, using phosphorus ore tailing as substrate, by clay dry weight
Clay is mixed into the first mixture i.e. sand clay (note: phosphorus ore tailing is also mixed with dry weight) with phosphorus ore tailing for 50% by volume,
The moisture content of each proportion sand clay mixture is measured, specific steps can refer to step 2)；
It 5) is 10% alkaline residue and first by alkaline residue dry weight volume using the sand clay mixture obtained in step 4) as substrate
Mixture sand clay progress second obtains the second mixture i.e. composite modified phosphorus ore tailing of alkaline residue clay after being mixed and stirred for uniformly
Mixture, measures the moisture content of each proportion composite modified phosphorus ore tailing mixture of alkaline residue clay, and specific steps can refer to step 2)；
6) II -2 type compaction test method is weighed to the second mixing by according to " highway earthwork test rule " (JTGE40-2007)
Object carries out compaction test, determines that the optimum moisture content of the second mixture is 11%；
7) it controls each proportion modified material moisture content and reaches default moisture content 11% (as shown in table 1) roadbed can be obtained and fill out
Expect S6.
Embodiment 7
The present embodiment is for illustrating the composite modified phosphorus ore tailing roadbed filling of alkaline residue clay provided by the invention and its preparation
Method
It is carried out in the way of embodiment 6, but alkaline residue volume is 20% in the second mixture, presets moisture content in step 7
It is 12%, obtains roadbed filling S7.
Embodiment 8
The present embodiment is for illustrating the composite modified phosphorus ore tailing roadbed filling of alkaline residue clay provided by the invention and its preparation
Method
It is carried out in the way of embodiment 6, but alkaline residue volume is 30% in the second mixture, presets moisture content in step 7
It is 13%, obtains roadbed filling S8.
Embodiment 9
The present embodiment is for illustrating the composite modified phosphorus ore tailing roadbed filling of alkaline residue clay provided by the invention and its preparation
Method
It is carried out in the way of embodiment 6, but alkaline residue volume is 40% in the second mixture, presets moisture content in step 7
It is 14%, obtains roadbed filling S9.
Embodiment 10
The present embodiment is for illustrating the composite modified phosphorus ore tailing roadbed filling of alkaline residue clay provided by the invention and its preparation
Method
It is carried out in the way of embodiment 6, but alkaline residue volume is 50% in the second mixture, presets moisture content in step 7
It is 15%, obtains roadbed filling S10.
Comparative example 1
1) it is paved, is dried or under the conditions of 50~65 DEG C of simulative natural air-dryings using place to alkaline residue, phosphorus ore tailing, clay
Drying is dried at a temperature of 100~150 DEG C, and control moisture content reaches reduced levels (< 5%), then rejects impurity in material,
Dry alkaline residue, phosphorus ore tailing, clay are crushed respectively using pulverizer, stirred evenly；
2) no less than 10 Duplicate Samples measurement moisture content are taken using quartering to every kind of material in step 1), takes its average value
Moisture content as a whole, sample point need to be uniformly distributed, each 50~100g of sample, need to be in 105 DEG C~120 DEG C of baking oven after sampling
10~12h of interior baking weighing；
3) if step 2) Duplicate Samples data distribution is excessively discrete, stir again, and repeat step 2), until data distribution is steady
Determine degree and reaches engine request；
4) dry weight for calculating clay and phosphorus ore tailing that step 2) obtains, using phosphorus ore tailing as substrate, by clay dry weight
Clay is mixed into the first mixture i.e. sand clay (note: phosphorus ore tailing is also mixed with dry weight) with phosphorus ore tailing for 75% by volume,
The moisture content of each proportion sand clay mixture is measured, specific steps can refer to step 2)；
It 5) is 10% alkaline residue and first by alkaline residue dry weight volume using the sand clay mixture obtained in step 4) as substrate
Mixture sand clay progress second obtains the second mixture i.e. composite modified phosphorus ore tailing of alkaline residue clay after being mixed and stirred for uniformly
Mixture, measures the moisture content of each proportion composite modified phosphorus ore tailing mixture of alkaline residue clay, and specific steps can refer to step 2)；
6) II -2 type compaction test method is weighed to the second mixing by according to " highway earthwork test rule " (JTGE40-2007)
Object carries out compaction test, determines that the optimum moisture content of the second mixture is 13%；
7) it controls each proportion modified material moisture content and reaches default moisture content 13% (as shown in table 1) roadbed can be obtained and fill out
Expect D1.
Comparative example 2
This comparative example example is for illustrating improvement roadbed filling of reference and preparation method thereof
It is carried out in the way of comparative example 1, but alkaline residue volume is 20% in the second mixture, presets moisture content in step 7
It is 14%, obtains roadbed filling D2.
Comparative example 3
This comparative example example is for illustrating improvement roadbed filling of reference and preparation method thereof
It is carried out in the way of comparative example 1, but alkaline residue volume is 30% in the second mixture, presets moisture content in step 7
It is 15%, obtains roadbed filling D3.
Comparative example 4
This comparative example example is for illustrating improvement roadbed filling of reference and preparation method thereof
It is carried out in the way of comparative example 1, but alkaline residue volume is 40% in the second mixture, presets moisture content in step 7
It is 16%, obtains roadbed filling D4.
Comparative example 5
This comparative example example is for illustrating improvement roadbed filling of reference and preparation method thereof
It is carried out in the way of comparative example 1, but alkaline residue volume is 50% in the second mixture, presets moisture content in step 7
It is 17%, obtains roadbed filling D5.
Test case
This test case is used to illustrate the effect of the composite modified phosphorus ore tailing roadbed filling of alkaline residue clay in embodiment
(1) optimum moisture content and maximum dry density
It is carried out according to " highway earthwork test rule " (JTGE40-2007)
(2) CBR value and expansion rate
It is carried out according to " highway earthwork test rule " (JTGE40-2007)
(3) unconfined compressive strength
According to " highway engineering stabilized with inorganic binder testing of materials regulation " (JTGE51-2009)
Test result is listed in table 1, in Fig. 1, Fig. 2 and Fig. 3
Table 1
As can be seen that comparing with embodiment from table 1, Fig. 1, Fig. 2 and Fig. 3, clay is mixed than being more than in the substrate of comparative example
Phosphorus ore tailing, the filler of same alkaline residue volume, filler expansion rate rise, primary intensity CBR value decline, although non-confining strength
Degree is risen, but when alkaline residue volume is more than 20%, filler swell increment is excessive, and sample is loose, is unable to measure no lateral confinement intensity,
Illustrate that clay volume crosses conference and reduces the water stability of filler.The CBR value of obtained roadbed filling in the embodiment of the present invention
Big with unconfined compressive strength, expansion rate is small, and maximum dry density is big, and water stability is good, and bad material this to phosphorus ore tailing has bright
Aobvious improving effect is able to satisfy the requirement of roadbed filling.
Claims (10)
1. a kind of modified phosphorus ore tailing roadbed filling, which is characterized in that each component including following mass percentage: alkaline residue
10%~50%, substrate 50%~90%, wherein the substrate is by 25%~50% clay and 50%~75% phosphorus ore tailing group
At above-mentioned mass percentage is in terms of dry weight.
2. modified phosphorus ore tailing roadbed filling according to claim 1, which is characterized in that the alkaline residue is low liquid limit powder
Soil, the phosphorus ore tailing are fine sand, and the clay is low liquid limit clay.
3. modified phosphorus ore tailing roadbed filling according to claim 1, which is characterized in that in the alkaline residue, silt content
50~60%, sticky content 10~20%, sand grain content 20~30%；In the phosphorus ore tailing, sand grain content 70~80% is sticked
Grain content 10~15%, silt content 5~10%；In the clay, sand grain content 1~3%, is sticked silt content 40~50%
Grain content 40~50%.
4. the preparation method of any modified phosphorus ore tailing roadbed filling in claim 1-3, which is characterized in that first by clay
It is mixed to form the first mixture sand clay with phosphorus ore tailing, then alkaline residue and the first mixture sand clay are mixed to form second and mixed
Object is closed, i.e., modified phosphorus ore tailing roadbed filling.
5. being modified the preparation method of phosphorus ore tailing roadbed filling according to claim 4, which is characterized in that including following step
It is rapid:
(1) alkaline residue, clay, phosphorus ore tailing are taken, is separately dried to moisture content less than 5%, is pulverized and sieved, stirring after rejecting impurity
Stirring evenly in machine keeps the porous media of each material uniform, takes each material sample measurement initial aqueous rate respectively, then will examination
Sample baking claims dry weight；
(2) it is mixed to be mixed to get first for the phosphorus ore tailing and clay for taking step (1) to stir evenly respectively according to the proportion with dry weight
Object sand clay is closed, stirring keeps sand clay moisture content uniform, sand clay sample measurement initial aqueous rate taken, then by sand clay sample
Baking claims dry weight；
(3) the sand clay of the alkaline residue and step (2) that take step (1) to stir evenly respectively according to the proportion with dry weight, stirring are mixed
It closes, and adjusts moisture content, form the second composite modified phosphorus ore tailing of mixture alkaline residue clay, i.e., modified phosphorus ore tailing roadbed is filled out
Material.
6. being modified the preparation method of phosphorus ore tailing roadbed filling according to claim 5, which is characterized in that right in step (1)
Alkaline residue, phosphorus ore tailing, clay are paved using place, dry (environment temperature > 25 DEG C) drying, or in 50~65 DEG C of natural wind simulatings
It is dry under the conditions of dry, or drying at a temperature of 100~150 DEG C, make its moisture content less than 5%.
7. being modified the preparation method of phosphorus ore tailing roadbed filling according to claim 5, which is characterized in that in step (1), alkali
Slag, clay, phosphorus ore tailing crush until without obvious bulky grain and mistake 2mm sieve.
8. being modified the preparation method of phosphorus ore tailing roadbed filling according to claim 5, which is characterized in that step (1) and step
Suddenly in (2), every kind of material takes 10 parallel sample measurement moisture content using quartering, takes its average value moisture content as a whole,
Sample point need to pave in material and be uniformly distributed in range, each 50~100g of sample；If Duplicate Samples data distribution is excessively discrete, weight
New stirring, and sampling operation is repeated, until data distribution degree of stability reaches engine request.
9. being modified the preparation method of phosphorus ore tailing roadbed filling according to claim 5, which is characterized in that step (1) and step
Suddenly in (2), sample claims dry weight after toasting 10~12h in 105~120 DEG C of baking ovens.
10. being modified the preparation method of phosphorus ore tailing roadbed filling according to claim 5, which is characterized in that in step (3),
Adjusting the second composite modified phosphorus ore tailing moisture content of mixture alkaline residue clay is 11~16%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115717346A (en) * | 2022-12-08 | 2023-02-28 | 江苏海洋大学 | Be applied to two base structures of giving up admittedly among road engineering |
| CN117213964A (en) * | 2023-11-07 | 2023-12-12 | 山东泰和城建发展有限公司 | Highway pavement bearing ratio measurement and detection device and detection method |
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| CN1844011A (en) * | 2005-04-08 | 2006-10-11 | 上海海马海洋生物科技开发有限公司 | Method for manufacturing urban industrial back filling by utilizing alkali waste and rock phosphate sand |
| CN101148331A (en) * | 2007-08-31 | 2008-03-26 | 中铁八局集团有限公司 | Roadbed filling |
| CN101215115A (en) * | 2008-01-18 | 2008-07-09 | 武汉路德科技有限责任公司 | Method for preparing engineering soil from alkali slag, phosphorite tailings sand and HEC curing agent of alkali production plant |
| CN107100049A (en) * | 2017-06-07 | 2017-08-29 | 安徽省交通规划设计研究总院股份有限公司 | A kind of clay improves the construction method of CHARACTERISTICS OF TAILINGS SAND roadbed filling |
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| CN115717346A (en) * | 2022-12-08 | 2023-02-28 | 江苏海洋大学 | Be applied to two base structures of giving up admittedly among road engineering |
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