CN112239345A - Red mud-based highway cushion material - Google Patents
Red mud-based highway cushion material Download PDFInfo
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- CN112239345A CN112239345A CN202010949166.3A CN202010949166A CN112239345A CN 112239345 A CN112239345 A CN 112239345A CN 202010949166 A CN202010949166 A CN 202010949166A CN 112239345 A CN112239345 A CN 112239345A
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- China
- Prior art keywords
- parts
- red mud
- cushion material
- phosphogypsum
- slag
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- 239000000463 material Substances 0.000 title claims abstract description 103
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims abstract description 46
- 239000000843 powder Substances 0.000 claims abstract description 41
- 239000002893 slag Substances 0.000 claims abstract description 36
- 239000004575 stone Substances 0.000 claims abstract description 23
- 239000003245 coal Substances 0.000 claims abstract description 22
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 21
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 21
- 239000004571 lime Substances 0.000 claims abstract description 21
- 239000010881 fly ash Substances 0.000 claims abstract description 17
- 239000003818 cinder Substances 0.000 claims abstract description 13
- 239000000654 additive Substances 0.000 claims abstract description 10
- 230000000996 additive effect Effects 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 34
- 239000002245 particle Substances 0.000 claims description 28
- 238000004131 Bayer process Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 15
- 238000007792 addition Methods 0.000 claims description 14
- 238000001914 filtration Methods 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 238000000227 grinding Methods 0.000 claims description 10
- 239000011812 mixed powder Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 9
- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 7
- 230000001376 precipitating effect Effects 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 229910001018 Cast iron Inorganic materials 0.000 claims description 5
- 230000007935 neutral effect Effects 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 239000007767 bonding agent Substances 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 235000012239 silicon dioxide Nutrition 0.000 description 4
- 239000000126 substance Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- E01C3/00—Foundations for pavings
- E01C3/003—Foundations for pavings characterised by material or composition used, e.g. waste or recycled material
-
- 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
- E01C3/00—Foundations for pavings
- E01C3/06—Methods or arrangements for protecting foundations from destructive influences of moisture, frost or vibration
-
- 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
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
Abstract
The invention relates to the technical field of highways, in particular to a red mud-based highway cushion material which is prepared from the following components in parts by weight: 45-55 parts of red mud, 25-40 parts of phosphogypsum additive material, 10-15 parts of coal cinder, 8-10 parts of slag, 30-45 parts of lime powder, 5-8 parts of fly ash and 50-60 parts of broken stone; the invention designs an expressway cushion material which can be used for paving an expressway roadbed cushion to ensure the effect of the cushion, and meanwhile, the red mud and the phosphogypsum are mixed and neutralized to play roles in waste utilization, treatment and utilization, and the material has higher bearing effect and waterproof and antifreezing effects.
Description
Technical Field
The invention relates to the technical field of highways, in particular to a red mud-based highway cushion material.
Background
The red mud is industrial solid waste discharged when aluminum oxide is extracted in the aluminum industry, and is called red mud because of large iron oxide content and similar appearance to red mud. The red mud has higher pH value, so the alkalinity is extremely high, the treatment of the red mud usually needs more areas of yard stacking, occupies a large amount of land, pollutes the environment while stacking, and also needs high maintenance cost; at present, the application of red mud to highway construction is one direction of research of people, because the pavement of the highway needs a large amount of materials, the problem of red mud treatment can be solved, but the alkalinity of the red mud needs to be treated when the red mud is used; the phosphogypsum is a solid waste produced in a wet-process phosphoric acid process, the components of the phosphogypsum are mainly calcium sulfate dihydrate, a large amount of phosphogypsum is produced every year in China, the phosphogypsum is acidic, and the phosphogypsum and red mud can play a role in mixing and neutralizing.
The ardealite and the red mud can be mixed and neutralized, but the harmfulness of the mixture still needs to be noticed, and meanwhile, the property of the mixture is not suitable for road paving, and the treatment effect can be completely achieved only by treating and modifying the mixture for road paving;
the pavement cushion layer is a structural layer between a base layer or a subbase layer and a roadbed, and mainly plays a role in diffusing load stress and improving the water temperature condition of the roadbed so as to ensure that the strength, rigidity and stability of the surface layer and the base layer are not influenced by the adverse effect caused by the change of the water temperature condition of the soil base.
The invention provides a red mud-based highway cushion material to make up the technical gap.
Disclosure of Invention
The invention aims to provide a red mud-based highway cushion material.
In order to achieve the purpose, the invention adopts the following technical scheme:
the red mud-based highway cushion material is composed of the following components in parts by weight: 45-55 parts of red mud, 25-40 parts of phosphogypsum additive material, 10-15 parts of coal slag, 8-10 parts of slag, 30-45 parts of lime powder, 5-8 parts of fly ash and 50-60 parts of broken stone.
Further, the red mud is filtered by a vacuum filter to ensure that the water content is 35-45%, and the red mud is Bayer process red mud with the particle size of 0.15-0.25 mm.
Further, adding water into the phosphogypsum according to the mass ratio for washing, finally precipitating and dehydrating, drying the obtained material at the temperature of 200-300 ℃, and adding a bonding agent to obtain a phosphogypsum addition material with the particle size of 0.25-0.40 mm.
Furthermore, the main components of the coal cinder are silicon dioxide and aluminum oxide.
Further, the slag is neutral slag generated after cast iron.
Furthermore, the adopted particle size of the crushed stone is 10-50mm, and the crushed stone is subjected to dust filtration treatment.
Further, the preparation method of the red mud-based highway cushion material comprises the following steps:
the method comprises the following steps: selecting Bayer process red mud, putting the Bayer process red mud into a vacuum filter, filtering to ensure that the water content is 35-45%, and grinding or crushing the Bayer process red mud into powder with the particle size of 0.15-0.25 mm to obtain a red mud material;
step two: adding water into the phosphogypsum according to the mass ratio for washing, precipitating and dehydrating, drying the obtained material at the temperature of 200-300 ℃, and adding a bonding agent to obtain a phosphogypsum addition material with the particle size of 0.25-0.40 mm;
step three: the composition comprises the following components in parts by weight: 45-55 parts of red mud and 25-40 parts of phosphogypsum adding material are put into a stirring machine, the set rotating speed is 300-400r/min, water is added according to the viscosity for mixing, the water content is ensured to be more than 20 percent, and a sticky matter is obtained;
step four: obtaining a sticky matter, standing and filtering, drying obtained filter residues to obtain dry powder, and grinding the powder to ensure that the particle size is less than 0.40 mm;
step five: putting the powder obtained in the fourth step into a stirring machine, and adding the following components in parts by weight: 10-15 parts of coal slag, 8-10 parts of slag, 30-45 parts of lime powder, 5-8 parts of fly ash and 50-60 parts of broken stone, wherein the set rotating speed is 500-700r/min, and the stirring time is more than 30min, so that mixed powder is obtained, and the mixed powder is a cushion material.
Further, the paving method of the red mud-based highway cushion material comprises the following steps:
the method comprises the following steps: leveling the paved ground by a road roller machine to ensure that the road surface has certain flatness;
step two: certain gravels are taken to pave the road surface, and pits on the ground are filled, so that the leveling effect is achieved;
step three: paving a cushion material on the ground, and paving a thicker bulge on the edge of the cushion material;
step four: and flattening the cushion material to finish the laying of the cushion.
Further, the paint comprises the following components in parts by weight: 35-45 parts of red mud, 30-35 parts of phosphogypsum additive material, 5-10 parts of coal cinder, 8-10 parts of slag, 10-15 parts of lime powder, 5-8 parts of fly ash and 100-sand 150.
Further, the paint comprises the following components in parts by weight: 40-50 parts of red mud, 30-40 parts of phosphogypsum additive material, 10-15 parts of coal slag, 8-10 parts of slag, 15-25 parts of lime powder, 5-8 parts of fly ash and 80-120 parts of flake stone.
The invention has the beneficial effects that:
according to the invention, the red mud and the phosphogypsum are mixed, so that the mixing and neutralizing effects are achieved, the overhigh acidity and alkalinity is avoided, the harmless treatment to a certain degree is realized, then the mixture is mixed with materials with certain components, the integral mixture has the properties of a cushion material, and the cushion material is applied to paving a roadbed cushion.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments.
Example 1
The red mud-based highway cushion material comprises the following components in parts by weight: 45 parts of red mud, 25 parts of phosphogypsum addition material, 10 parts of coal slag, 8 parts of slag, 30 parts of lime powder, 5 parts of fly ash and 50 parts of broken stone.
Wherein the red mud is filtered by a vacuum filter to ensure that the water content is 35-45%, and the red mud is Bayer process red mud with the particle size of 0.15 mm.
The phosphogypsum is washed by adding water according to the mass ratio, finally precipitated and dehydrated, the obtained material is dried at 200 ℃, and an adhesive is added to obtain the phosphogypsum addition material with the particle size of 0.25 mm.
Wherein, the main components of the coal cinder are silicon dioxide and alumina.
Wherein the slag is neutral slag generated after cast iron.
Wherein the adopted particle size of the broken stone is 10mm, and the broken stone is subjected to dust filtration treatment.
The preparation method of the red mud-based highway cushion material comprises the following steps:
the method comprises the following steps: selecting Bayer process red mud, putting the Bayer process red mud into a vacuum filter, filtering to make the water content reach 35%, and grinding or crushing the Bayer process red mud into powder with the particle size of 0.15mm to obtain a red mud material;
step two: adding water into the phosphogypsum according to the mass ratio for washing, precipitating and dehydrating, drying the obtained material at 200 ℃, and adding an adhesive to obtain a phosphogypsum addition material with the particle size of 0.25 mm;
step three: the composition comprises the following components in parts by weight: putting the red mud 45 and the phosphogypsum adding material 25 into a stirring machine, setting the rotating speed to be 300r/min, adding water according to the viscosity for mixing, and ensuring that the water content is more than 20 percent to obtain a sticky substance;
step four: obtaining a sticky matter, standing and filtering, drying obtained filter residues to obtain dry powder, and grinding the powder to ensure that the particle size is less than 0.40 mm;
step five: putting the powder obtained in the fourth step into a stirring machine, and adding the following components in parts by weight: 10 parts of coal cinder, 8 parts of slag, 30 parts of lime powder, 5 parts of fly ash and 50 parts of broken stone, wherein the set rotating speed is 500r/min, and the stirring time is more than 30min, so that mixed powder is obtained, and the mixed powder is a cushion material.
The paving method of the red mud-based highway cushion material comprises the following steps:
the method comprises the following steps: leveling the paved ground by a road roller machine to ensure that the road surface has certain flatness;
step two: certain gravels are taken to pave the road surface, and pits on the ground are filled, so that the leveling effect is achieved;
step three: paving a cushion material on the ground, and paving a thicker bulge on the edge of the cushion material;
step four: and flattening the cushion material to finish the laying of the cushion.
Example 2
The red mud-based highway cushion material comprises the following components in parts by weight: the raw materials comprise 55 of red mud, 40 of phosphogypsum addition materials, 15 of coal cinder, 10 of slag, 45 of lime powder, 8 of fly ash and 60 of broken stone.
Wherein the red mud is filtered by a vacuum filter to ensure that the water content is 45 percent, and the red mud is Bayer process red mud with the grain diameter of 0.25 mm.
The phosphogypsum is washed by adding water according to the mass ratio, finally precipitated and dehydrated, the obtained material is dried at 300 ℃, and an adhesive is added to obtain the phosphogypsum addition material with the particle size of 0.40 mm.
Wherein, the main components of the coal cinder are silicon dioxide and alumina.
Wherein the slag is neutral slag generated after cast iron.
Wherein the adopted particle size of the broken stone is 50mm, and the broken stone is subjected to dust filtration treatment.
The preparation method of the red mud-based highway cushion material comprises the following steps:
the method comprises the following steps: selecting Bayer process red mud, putting the Bayer process red mud into a vacuum filter, filtering to ensure that the water content is 45%, and grinding or crushing the Bayer process red mud into powder with the particle size of 0.25mm to obtain a red mud material;
step two: adding water into the phosphogypsum according to the mass ratio for washing, precipitating and dehydrating, drying the obtained material at 300 ℃, and adding an adhesive to obtain a phosphogypsum addition material with the particle size of 0.40 mm;
step three: the composition comprises the following components in parts by weight: putting the red mud 55 and the phosphogypsum adding material 40 into a stirring machine, setting the rotating speed to be 400r/min, adding water according to the viscosity for mixing, and ensuring that the water content is more than 20 percent to obtain a sticky substance;
step four: obtaining a sticky matter, standing and filtering, drying obtained filter residues to obtain dry powder, and grinding the powder to ensure that the particle size is less than 0.40 mm;
step five: putting the powder obtained in the fourth step into a stirring machine, and adding the following components in parts by weight: 15 parts of coal cinder, 10 parts of slag, 45 parts of lime powder, 8 parts of fly ash and 60 parts of broken stone, wherein the set rotating speed is 700r/min, and the stirring time is more than 30min, so that mixed powder is obtained, and the mixed powder is a cushion material.
The paving method of the red mud-based highway cushion material comprises the following steps:
the method comprises the following steps: leveling the paved ground by a road roller machine to ensure that the road surface has certain flatness;
step two: certain gravels are taken to pave the road surface, and pits on the ground are filled, so that the leveling effect is achieved;
step three: paving a cushion material on the ground, and paving a thicker bulge on the edge of the cushion material;
step four: and flattening the cushion material to finish the laying of the cushion.
Example 3
The red mud-based highway cushion material comprises the following components in parts by weight: 50 parts of red mud, 32 parts of phosphogypsum additive materials, 12 parts of coal slag, 9 parts of slag, 38 parts of lime powder, 6 parts of fly ash and 55 parts of broken stone.
Wherein the red mud is filtered by a vacuum filter to ensure that the water content is 40 percent, and the red mud is Bayer process red mud with the grain diameter of 0.20 mm.
The phosphogypsum is washed by adding water according to the mass ratio, finally precipitated and dehydrated, the obtained material is dried at 250 ℃, and an adhesive is added to obtain the phosphogypsum addition material with the particle size of 0.30 mm.
Wherein, the main components of the coal cinder are silicon dioxide and alumina.
Wherein the slag is neutral slag generated after cast iron.
Wherein the adopted particle size of the broken stone is 30mm, and the broken stone is subjected to dust filtration treatment.
The preparation method of the red mud-based highway cushion material comprises the following steps:
the method comprises the following steps: selecting Bayer process red mud, putting the Bayer process red mud into a vacuum filter, filtering to make the water content reach 40%, and grinding or crushing the Bayer process red mud into powder with the particle size of 0.2mm to obtain a red mud material;
step two: adding water into the phosphogypsum according to the mass ratio for washing, precipitating and dehydrating, drying the obtained material at 250 ℃, and adding an adhesive to obtain a phosphogypsum addition material with the particle size of 0.30 mm;
step three: the composition comprises the following components in parts by weight: putting 50 parts of red mud and 32 parts of phosphogypsum adding materials into a stirring machine, setting the rotating speed to be 350r/min, adding water according to the viscosity for mixing, and ensuring that the water content is more than 20% to obtain a sticky substance;
step four: obtaining a sticky matter, standing and filtering, drying obtained filter residues to obtain dry powder, and grinding the powder to ensure that the particle size is less than 0.40 mm;
step five: putting the powder obtained in the fourth step into a stirring machine, and adding the following components in parts by weight: the method comprises the following steps of (1) obtaining mixed powder by setting the rotation speed of coal cinder 12, slag 9, lime powder 38, fly ash 6 and broken stone 55 at 600r/min and stirring for more than 30min, wherein the mixed powder is a cushion material.
The paving method of the red mud-based highway cushion material comprises the following steps:
the method comprises the following steps: leveling the paved ground by a road roller machine to ensure that the road surface has certain flatness;
step two: certain gravels are taken to pave the road surface, and pits on the ground are filled, so that the leveling effect is achieved;
step three: paving a cushion material on the ground, and paving a thicker bulge on the edge of the cushion material;
step four: and flattening the cushion material to finish the laying of the cushion.
Example 4: compositional material modification
The red mud-based highway cushion material comprises the following components in parts by weight: 35-45 parts of red mud, 30-35 parts of phosphogypsum additive material, 5-10 parts of coal cinder, 8-10 parts of slag, 10-15 parts of lime powder, 5-8 parts of fly ash and 100-sand 150.
This embodiment is through reducing the share of lime powder, guarantees the mixing action of lime powder, changes the rubble into grit for the bed course has great space, can cut off the rise of capillary water, can impound, drainage again during freeze thawing, reducible frost heaving and the settlement on road surface
Example 5 compositional Material Change
The red mud-based highway cushion material comprises the following components in parts by weight: 40-50 parts of red mud, 30-40 parts of phosphogypsum additive material, 10-15 parts of coal slag, 8-10 parts of slag, 15-25 parts of lime powder, 5-8 parts of fly ash and 80-120 parts of flake stone.
This embodiment is through reducing the share of lime powder, guarantees the mixing action of lime powder, changes the rubble into the rubble, and the rubble is carried out the hand through the manual work when laying and is put for the bed course has great space, can cut off the rise of capillary water, and frost heaving and the settlement on reducible road surface improve road bed temperature situation.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.
Claims (10)
1. The red mud-based highway cushion material is characterized by comprising the following components in parts by weight: 45-55 parts of red mud, 25-40 parts of phosphogypsum additive material, 10-15 parts of coal slag, 8-10 parts of slag, 30-45 parts of lime powder, 5-8 parts of fly ash and 50-60 parts of broken stone.
2. The red mud-based highway cushion material according to claim 1, wherein said red mud is filtered by a vacuum filter to have a water content of 35-45%, said red mud is Bayer process red mud, and the particle size is 0.15-0.25 mm.
3. The red mud-based highway cushion material according to claim 1, wherein the phosphogypsum is washed by adding water according to the mass ratio, finally precipitated and dehydrated, the obtained material is dried at the temperature of 200-300 ℃, and an adhesive is added to obtain the phosphogypsum addition material, wherein the particle size of the phosphogypsum addition material is 0.25-0.40 mm.
4. The red mud-based highway cushion material according to claim 1, wherein the main components of said coal cinder are silica and alumina.
5. The red mud-based highway cushion material according to claim 1, wherein said slag is neutral slag produced after cast iron.
6. The red mud-based highway cushion material according to claim 1, wherein said crushed stones have a particle size of 10-50mm and are dust-filtered.
7. The red mud-based highway cushion material according to claim 1, wherein the red mud-based highway cushion material is prepared by the following steps:
the method comprises the following steps: selecting Bayer process red mud, putting the Bayer process red mud into a vacuum filter, filtering to ensure that the water content is 35-45%, and grinding or crushing the Bayer process red mud into powder with the particle size of 0.15-0.25 mm to obtain a red mud material;
step two: adding water into the phosphogypsum according to the mass ratio for washing, precipitating and dehydrating, drying the obtained material at the temperature of 200-300 ℃, and adding a bonding agent to obtain a phosphogypsum addition material with the particle size of 0.25-0.40 mm;
step three: the composition comprises the following components in parts by weight: 45-55 parts of red mud and 25-40 parts of phosphogypsum adding material are put into a stirring machine, the set rotating speed is 300-400r/min, water is added according to the viscosity for mixing, the water content is ensured to be more than 20 percent, and a sticky matter is obtained;
step four: obtaining a sticky matter, standing and filtering, drying obtained filter residues to obtain dry powder, and grinding the powder to ensure that the particle size is less than 0.40 mm;
step five: putting the powder obtained in the fourth step into a stirring machine, and adding the following components in parts by weight: 10-15 parts of coal slag, 8-10 parts of slag, 30-45 parts of lime powder, 5-8 parts of fly ash and 50-60 parts of broken stone, wherein the set rotating speed is 500-700r/min, and the stirring time is more than 30min, so that mixed powder is obtained, and the mixed powder is a cushion material.
8. The red mud-based highway cushion material according to claim 1, wherein the red mud-based highway cushion material is laid by the following method:
the method comprises the following steps: leveling the paved ground by a road roller machine to ensure that the road surface has certain flatness;
step two: certain gravels are taken to pave the road surface, and pits on the ground are filled, so that the leveling effect is achieved;
step three: paving a cushion material on the ground, and paving a thicker bulge on the edge of the cushion material;
step four: and flattening the cushion material to finish the laying of the cushion.
9. The red mud-based highway cushion material according to claims 1-8, which is characterized by comprising the following components in parts by weight: 35-45 parts of red mud, 30-35 parts of phosphogypsum additive material, 5-10 parts of coal cinder, 8-10 parts of slag, 10-15 parts of lime powder, 5-8 parts of fly ash and 100-sand 150.
10. The red mud-based highway cushion material according to claims 1-8, which is characterized by comprising the following components in parts by weight: 40-50 parts of red mud, 30-40 parts of phosphogypsum additive material, 10-15 parts of coal slag, 8-10 parts of slag, 15-25 parts of lime powder, 5-8 parts of fly ash and 80-120 parts of flake stone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010949166.3A CN112239345A (en) | 2020-09-10 | 2020-09-10 | Red mud-based highway cushion material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010949166.3A CN112239345A (en) | 2020-09-10 | 2020-09-10 | Red mud-based highway cushion material |
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| Publication Number | Publication Date |
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| CN112239345A true CN112239345A (en) | 2021-01-19 |
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| CN202010949166.3A Pending CN112239345A (en) | 2020-09-10 | 2020-09-10 | Red mud-based highway cushion material |
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| CN (1) | CN112239345A (en) |
Cited By (2)
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| CN114380518A (en) * | 2022-01-25 | 2022-04-22 | 中国地质大学（武汉） | Bayer process red mud-phosphogypsum baking-free cementing material and preparation method thereof |
| CN114920477A (en) * | 2022-05-20 | 2022-08-19 | 中冀建勘集团有限公司 | Coal gasification ash cushion material and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114380518A (en) * | 2022-01-25 | 2022-04-22 | 中国地质大学（武汉） | Bayer process red mud-phosphogypsum baking-free cementing material and preparation method thereof |
| CN114920477A (en) * | 2022-05-20 | 2022-08-19 | 中冀建勘集团有限公司 | Coal gasification ash cushion material and preparation method and application thereof |
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Application publication date: 20210119 |