CN108546066A - A kind of ardealite stablizes collapsible loess subgrade material and preparation method - Google Patents
A kind of ardealite stablizes collapsible loess subgrade material and preparation method Download PDFInfo
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- CN108546066A CN108546066A CN201810409945.7A CN201810409945A CN108546066A CN 108546066 A CN108546066 A CN 108546066A CN 201810409945 A CN201810409945 A CN 201810409945A CN 108546066 A CN108546066 A CN 108546066A
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- Prior art keywords
- ardealite
- collapsible loess
- calcium hydroxide
- stablizes
- flyash
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Classifications
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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
- C04B28/14—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 calcium sulfate cements
- C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/143—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being phosphogypsum
-
- 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
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
- C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
-
- 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
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention discloses a kind of ardealites to stablize collapsible loess subgrade material and preparation method thereof, by in flyash, ardealite is added in the mixture of calcium hydroxide and collapsible loess composition, by adding ardealite, its main component calcium sulfate contained can activate the activity of inert material flyash, accelerate the pozzolanic reaction between lime and flyash, and generate needle-shaped entringite, to play the role of further enhancing two ash stability collapsible loess intensity, make it have higher intensity, rigidity and excellent pavement performance, the Ga2+ and flyash contained in calcium hydroxide, the active SiO contained in collapsible loess2And Al2O3Aqueous calcium silicates and calcium aluminate that effect generates are the bases that two ash stability collapsible loess intensity is formed, inventive formulation is reasonable, preparation method is simple, and finished product has preferable intensity, rigidity and good pavement performance, is suitable for Collapsible Loess District highway construction.
Description
Technical field
The present invention relates to a kind of ardealites to stablize collapsible loess subgrade material and preparation method, belongs to highway subgrade material
Field.
Background technology
The soil is porous for collapsible loess, has typical pore structure, if unprocessed be used as roadbed, under precipitation effect
Intensity can reduce rapidly, and cause collapsible loess subgrade occur it is paroxysmal collapse, the engineerings matter such as soil-slope entirety slumping
Amount problem, and then cause road surface and the secondary road disease such as large area crack, depression occur.It is deposited in view of collapsible loess subgrade itself
Problems, it is necessary to take certain technical measures to be punished, make it have certain intensity and bearing capacity, with ensure
The stability and use quality of roadbed.
Ardealite is the industry byproduct of phosphorous chemical industry enterprise Wet-process phosphoric acid (WPPA), the fluoride contained, free phosphoric acid,
The substances such as P2O5 are serious to earth's surface and underground water pollution；A large amount of stockpilings of ardealite not only occupy rare land resource, and
And the heavy metal wherein contained wind erosion and under the action of weathering can serious contaminated soil, the total crop failure of crops is caused, to agricultural
Production causes huge loss, while very violent to atmosphere pollution, seriously destroys ecological environment.According to statistics, domestic at present
The accumulative volume of cargo in storage of ardealite is more than 300,000,000 tons, and volume of cargo in storage is still with annual 50000000 tons of speed increase, the harm to environment
Also aggravating year by year.Delay currently, the utilization ways of China's ardealite are concentrated mainly on ardealite replacement natural gypsum production cement
Solidifying agent, ardealite prepares building materials, ardealite produces soil conditioner etc., but dosage very little, seriously restricts ardealite
Utilization rate.
There are much patented technologies about ardealite and roadbed material at present, such as application No. is
201510314184.3 Chinese patent《A kind of modified ardealite roadbed stuffing for expressway and preparation method thereof》, application No. is
201510316148.0 Chinese patent《A kind of construction technology of roadbed using ardealite stabilized expansive soil》, application No. is
201210121568.X Chinese patent《A kind of road foundation filler and preparation method thereof》Although Deng, be related to ardealite use
Make general subgrade filler, but because of the characteristic of collapsible loess subgrade itself, ardealite is not applicable to play its effect, therefore about phosphorus
The patent that gypsum stablizes collapsible loess subgrade material still belongs to blank.
Invention content
In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a kind of ardealites to stablize collapsible loess subgrade
Material and preparation method can improve ardealite utilization rate on the basis of overcoming the engineering problem of collapsible loess subgrade, solution
Certainly ardealite volume of cargo in storage constantly expands, utilization rate deficiency, land occupation resource, seriously pollutes the problem of environment.
In order to achieve the above objectives, the present invention adopts the following technical scheme that：
A kind of ardealite stabilization collapsible loess subgrade material, mixes lower material by mass percentage：Ardealite 6~
11%, flyash 12~22%, calcium hydroxide 6~11%, collapsible loess 52~76%.
Further, wherein the grain size of ardealite is not more than 4.75mm.
Further, flyash grade is II grade of national standard or more.
Further, calcium hydroxide is calcareous calcium hydroxide or magnesia calcium hydroxide, and grain size is not more than 2.36mm, and the efficient oxidation calcium adds
Content of magnesia is not less than 55%.
Further, collapsible loess is self-weight collapse loess or non-self centred graph, and grain size is not more than
4.75mm。
A kind of ardealite stablizes the preparation method of collapsible loess subgrade material, includes the following steps：
Step 1), by ardealite, calcium hydroxide, that collapsible loess is broken into graininess is spare；
Step 2) takes ardealite, flyash, calcium hydroxide, collapsible loess according to 6~11% by mass percentage：12~
22%：6~11%：56~76%, by the uniform mixing under normal temperature condition of ardealite, flyash and calcium hydroxide, obtain product A；
Step 3) and then by collapsible loess and product A uniform mixings under normal temperature condition, obtains product B；
Step 4), by product B and water according to 1：The quality mixture ratio of (0.195~0.276) fully stirs under normal temperature condition
It mixes uniformly, obtains products C, is i.e. ardealite stablizes collapsible loess subgrade finished material.
Further, in step 1), ardealite, collapsible loess grain size are not more than 4.75mm, and calcium hydroxide grain size is not more than
2.36mm。
Compared with prior art, the present invention has technique effect beneficial below：
A kind of ardealite of the present invention stablizes collapsible loess subgrade material, ardealite stablize collapsible loess subgrade material with
Two ash stability collapsible loess is basic material, by adding ardealite, the Ga2+ contained in calcium hydroxide and flyash, collapsibility
The active SiO contained in loess2And Al2O3It is that two ash stability collapsible loess is strong to act on the aqueous calcium silicates generated and calcium aluminate
The basis formed, i.e. pozzolanic reaction are spent, the calcium sulfate contained using ardealite can activate inert material flyash activity, add
Pozzolanic reaction between fast lime and flyash, and generate needle-shaped entringite, to play, to further enhance two ash stability wet
The effect of property strength of loess is fallen into, product of the present invention is not only able to solve the engineering problem of collapsible loess subgrade, additionally it is possible to solve
Ardealite volume of cargo in storage constantly expands, utilization rate deficiency, land occupation resource, seriously pollutes the problem of environment, is meeting China
The strategy of sustainable development policy of implementation has greatly society and economic benefit and wide application prospect.Inventive formulation
Rationally, preparation method is simple, and finished product has preferable intensity, rigidity and good pavement performance, suitable for collapsible loess
Area's highway construction.
A kind of ardealite stabilization collapsible loess subgrade material preparation method, it is first that ardealite, calcium hydroxide, collapsibility is yellow
It is spare that soil is broken into graininess；Then ardealite, flyash, calcium hydroxide are mixed and stirred according to quality mixture ratio under normal temperature condition
It is even, keep ardealite, flyash, calcium hydroxide mixing abundant, the calcium sulfate contained using ardealite can activate inert material fine coal
Grey activity, accelerates the pozzolanic reaction between lime and flyash, and generate needle-shaped entringite, then adds collapsible loess
It is uniformly mixed, is formed and stablize collapsible loess subgrade material, to play the role of further enhancing collapsible loess intensity.
Specific implementation mode
The present invention is described in further detail below：
A kind of ardealite stabilization collapsible loess subgrade material, following material is mixed by mass percentage：Ardealite 6
~11%, flyash 12~22%, calcium hydroxide 6~11%, collapsible loess 52~76%.
Wherein the grain size of ardealite is not more than 4.75mm；Flyash grade must be II grade of national standard or more；Calcium hydroxide is calcareous
Calcium hydroxide or magnesia calcium hydroxide, grain size are not more than 2.36mm, and the efficient oxidation calcium adds content of magnesia to be not less than 55%；Collapsibility is yellow
Soil is self-weight collapse loess or non-self centred graph, and grain size is not more than 4.75mm；
It is basic material that ardealite, which stablizes collapsible loess subgrade material with two ash stability collapsible loess, by adding phosphorus
Gypsum, the main component calcium sulfate contained can activate the activity of inert material flyash, accelerate between lime and flyash
Pozzolanic reaction, but the comparison that this reaction carries out is slow, and generates needle-shaped entringite, and two are further enhanced to play
Ash stablizes the effect of collapsibility strength of loess, makes it have higher intensity, rigidity and excellent pavement performance, contains in calcium hydroxide
The active SiO contained in some Ga2+ and flyash, collapsible loess2And Al2O3Act on the aqueous calcium silicates and calcium aluminate generated
It is the basis that two ash stability collapsible loess intensity is formed, i.e. pozzolanic reaction, the calcium sulfate contained using ardealite can swash
Inert material flyash activity living, accelerates the pozzolanic reaction between lime and flyash, and generate needle-shaped entringite, to rise
To the effect for further enhancing two ash stability collapsible loess intensity, product of the present invention is not only able to solve collapsible loess subgrade
Engineering problem, additionally it is possible to solve that ardealite volume of cargo in storage constantly expands, utilization rate is insufficient, land occupation resource, seriously pollutes ring
The problem of border, meets the strategy of sustainable development policy implemented in China, has greatly society and economic benefit and wide
Application prospect.Inventive formulation is reasonable, and preparation method is simple, and finished product has preferable intensity, rigidity and good road property
Can, it is suitable for Collapsible Loess District highway construction.
A kind of ardealite stablizes the preparation method of collapsible loess subgrade material, includes the following steps：
Step 1), by ardealite, calcium hydroxide, that collapsible loess is broken into graininess is spare；
Step 2) takes ardealite, flyash, calcium hydroxide, collapsible loess according to 6~11% by mass percentage：12~
22%：6~11%：56~76%, by the uniform mixing under normal temperature condition of ardealite, flyash and calcium hydroxide, obtain product A；
Step 3) and then by collapsible loess and product A uniform mixings under normal temperature condition, obtains product B；
Step 4), by product B and water according to 1：The quality mixture ratio of (0.195~0.276) fully stirs under normal temperature condition
It mixes uniformly, obtains products C, is i.e. ardealite stablizes collapsible loess subgrade finished material.
In step 1), ardealite, collapsible loess grain size are not more than 4.75mm, and calcium hydroxide grain size is not more than 2.36mm；
Embodiment 1
Ardealite, calcium hydroxide, collapsible loess are broken into graininess by step 1), wherein：Ardealite and collapsible loess
Grain size position 4.75mm, calcium hydroxide grain size position 2.36mm；
Step 2) takes ardealite 6%, flyash 12%, calcium hydroxide 6%, collapsible loess 76% by mass percentage, will
The uniform mixing under normal temperature condition of ardealite, flyash and calcium hydroxide, obtains product A；
Step 3) and then by collapsible loess and product A uniform mixings under normal temperature condition, obtains product B；
Product B and water are pressed 1 by step 4):0.195 stirs under normal temperature condition, obtains products C to get phosphorus stone
Cream stablizes collapsible loess subgrade finished material.
The ardealite of gained stablizes collapsible loess subgrade material through the above steps, with maximum density shaping test piece,
Measured unconfined compressive strength value (95% fraction), CBR values and swell increment be respectively 1.7MPa, 126.8%,
0.97%.
Embodiment 2
Ardealite, calcium hydroxide, collapsible loess are broken into graininess by step 1), wherein：Ardealite and collapsible loess
Grain size position 4.75mm, calcium hydroxide grain size position 2.36mm；
Step 2) takes ardealite 8%, flyash 16%, calcium hydroxide 8%, collapsible loess 68% by mass percentage, will
The uniform mixing under normal temperature condition of ardealite, flyash and calcium hydroxide, obtains product A；
Step 3) and then by collapsible loess and product A uniform mixings under normal temperature condition, obtains product B；
Product B and water are pressed 1 by step 4):0.219 stirs under normal temperature condition, obtains products C to get phosphorus stone
Cream stablizes collapsible loess subgrade finished material.
The ardealite of gained stablizes collapsible loess subgrade material through the above steps, with maximum density shaping test piece,
Measured unconfined compressive strength value (95% fraction), CBR values and swell increment be respectively 2.1MPa, 150.4%,
0.84%.
Embodiment 3
Ardealite, calcium hydroxide, collapsible loess are broken into graininess by step 1), wherein：Ardealite and collapsible loess
Grain size position 4.75mm, calcium hydroxide grain size position 2.36mm；
Step 2) takes ardealite 10%, flyash 20%, calcium hydroxide 10%, collapsible loess 60% by mass percentage,
By the uniform mixing under normal temperature condition of ardealite, flyash and calcium hydroxide, product A is obtained；
Step 3) and then by collapsible loess and product A uniform mixings under normal temperature condition, obtains product B；
Product B and water are pressed 1 by step 4):0.254 stirs under normal temperature condition, obtains products C to get phosphorus stone
Cream stablizes collapsible loess subgrade finished material.
The ardealite of gained stablizes collapsible loess subgrade material through the above steps, with maximum density shaping test piece,
Measured unconfined compressive strength value (95% fraction), CBR values and swell increment be respectively 1.6MPa, 135.5%,
0.76%.
Embodiment 4
Ardealite, calcium hydroxide, collapsible loess are broken into graininess by step 1), wherein：Ardealite and collapsible loess
Grain size position 4.75mm, calcium hydroxide grain size position 2.36mm；
Step 2) takes ardealite 7%, flyash 14%, calcium hydroxide 7%, collapsible loess 72% by mass percentage, will
The uniform mixing under normal temperature condition of ardealite, flyash and calcium hydroxide, obtains product A；
Step 3) and then by collapsible loess and product A uniform mixings under normal temperature condition, obtains product B；
Product B and water are pressed 1 by step 4):0.208 stirs under normal temperature condition, obtains products C to get phosphorus stone
Cream stablizes collapsible loess subgrade finished material.
The ardealite of gained stablizes collapsible loess subgrade material through the above steps, with maximum density shaping test piece,
Measured unconfined compressive strength value (95% fraction), CBR values and swell increment be respectively 1.8MPa, 137.8%,
0.92%.
Embodiment 5
Ardealite, calcium hydroxide, collapsible loess are broken into graininess by step 1), wherein：Ardealite and collapsible loess
Grain size position 4.75mm, calcium hydroxide grain size position 2.36mm；
Step 2) takes ardealite 9%, flyash 18%, calcium hydroxide 9%, collapsible loess 64% by mass percentage, will
The uniform mixing under normal temperature condition of ardealite, flyash and calcium hydroxide, obtains product A；
Step 3) and then by collapsible loess and product A uniform mixings under normal temperature condition, obtains product B；
Product B and water are pressed 1 by step 4):0.231 stirs under normal temperature condition, obtains products C to get phosphorus stone
Cream stablizes collapsible loess subgrade finished material.
The ardealite of gained stablizes collapsible loess subgrade material through the above steps, with maximum density shaping test piece,
Measured unconfined compressive strength value (95% fraction), CBR values and swell increment be respectively 1.9MPa, 142.1%,
0.81%.
Embodiment 6
Ardealite, calcium hydroxide, collapsible loess are broken into graininess by step 1), wherein：Ardealite and collapsible loess
Grain size position 4.75mm, calcium hydroxide grain size position 2.36mm；
Step 2) takes ardealite 11%, flyash 22%, calcium hydroxide 11%, collapsible loess 56% by mass percentage,
By the uniform mixing under normal temperature condition of ardealite, flyash and calcium hydroxide, product A is obtained；
Step 3) and then by collapsible loess and product A uniform mixings under normal temperature condition, obtains product B；
Product B and water are pressed 1 by step 4):0.276 stirs under normal temperature condition, obtains products C to get phosphorus stone
Cream stablizes collapsible loess subgrade finished material.
The ardealite of gained stablizes collapsible loess subgrade material through the above steps, with maximum density shaping test piece,
Measured unconfined compressive strength value (95% fraction), CBR values and swell increment be respectively 1.6MPa, 132.6%,
0.69%.
1 embodiment 1-6 parametric data tables of table
Claims (7)
1. a kind of ardealite stablizes collapsible loess subgrade material, which is characterized in that the lower material of mixing is by mass percentage：Phosphorus
Gypsum 6~11%, flyash 12~22%, calcium hydroxide 6~11%, collapsible loess 52~76%.
2. a kind of ardealite according to claim 1 stablizes collapsible loess subgrade material, which is characterized in that wherein phosphorus stone
The grain size of cream is not more than 4.75mm.
3. a kind of ardealite according to claim 1 stablizes collapsible loess subgrade material, which is characterized in that flyash etc.
Grade is II grade of national standard or more.
4. a kind of ardealite according to claim 1 stablizes collapsible loess subgrade material, which is characterized in that calcium hydroxide is
Calcareous calcium hydroxide or magnesia calcium hydroxide, grain size are not more than 2.36mm, and the efficient oxidation calcium adds content of magnesia to be not less than 55%.
5. a kind of ardealite according to claim 1 stablizes collapsible loess subgrade material, which is characterized in that collapsibility is yellow
Soil is self-weight collapse loess or non-self centred graph, and grain size is not more than 4.75mm.
6. a kind of ardealite stablizes the preparation method of collapsible loess subgrade material, which is characterized in that include the following steps：
Step 1), by ardealite, calcium hydroxide, that collapsible loess is broken into graininess is spare；
Step 2) takes ardealite, flyash, calcium hydroxide, collapsible loess according to 6~11% by mass percentage：12~22%：
6~11%：56~76%, by the uniform mixing under normal temperature condition of ardealite, flyash and calcium hydroxide, obtain product A；
Step 3) and then by collapsible loess and product A uniform mixings under normal temperature condition, obtains product B；
Step 4), by product B and water according to 1：The quality mixture ratio of (0.195~0.276) is sufficiently stirred under normal temperature condition
It is even, products C is obtained, i.e. ardealite stablizes collapsible loess subgrade finished material.
7. a kind of ardealite stablizes the preparation method of collapsible loess subgrade material according to claim 6, which is characterized in that
In step 1), ardealite, collapsible loess grain size are not more than 4.75mm, and calcium hydroxide grain size is not more than 2.36mm.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109440560A (en) * | 2018-10-24 | 2019-03-08 | 渭南渭业环保科技有限公司 | A kind of ardealite lime stablized soil |
| CN111424486A (en) * | 2020-04-20 | 2020-07-17 | 中国科学院地质与地球物理研究所 | Construction method for loess embankment settlement deformation control by adopting phosphogypsum |
| CN112500045A (en) * | 2020-12-09 | 2021-03-16 | 中建三局集团有限公司 | Fertilizer groove backfill material and backfill method for non-self-weight collapsible loess area |
| CN113563043A (en) * | 2021-08-13 | 2021-10-29 | 贵州大学 | Phosphogypsum-stabilized red clay roadbed material and preparation method thereof |
| CN113860833A (en) * | 2021-08-20 | 2021-12-31 | 贵州大学 | High-doping-amount phosphogypsum-stabilized red clay road base material and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109440560A (en) * | 2018-10-24 | 2019-03-08 | 渭南渭业环保科技有限公司 | A kind of ardealite lime stablized soil |
| CN111424486A (en) * | 2020-04-20 | 2020-07-17 | 中国科学院地质与地球物理研究所 | Construction method for loess embankment settlement deformation control by adopting phosphogypsum |
| CN112500045A (en) * | 2020-12-09 | 2021-03-16 | 中建三局集团有限公司 | Fertilizer groove backfill material and backfill method for non-self-weight collapsible loess area |
| CN113563043A (en) * | 2021-08-13 | 2021-10-29 | 贵州大学 | Phosphogypsum-stabilized red clay roadbed material and preparation method thereof |
| CN113860833A (en) * | 2021-08-20 | 2021-12-31 | 贵州大学 | High-doping-amount phosphogypsum-stabilized red clay road base material and preparation method thereof |
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Application publication date: 20180918 |
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