CN114644483A - High-strength red mud-based solid waste roadbed material - Google Patents
High-strength red mud-based solid waste roadbed material Download PDFInfo
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- CN114644483A CN114644483A CN202210267386.7A CN202210267386A CN114644483A CN 114644483 A CN114644483 A CN 114644483A CN 202210267386 A CN202210267386 A CN 202210267386A CN 114644483 A CN114644483 A CN 114644483A
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- 239000000463 material Substances 0.000 title claims abstract description 81
- 239000002910 solid waste Substances 0.000 title claims abstract description 21
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 11
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 11
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 11
- KVCGISUBCHHTDD-UHFFFAOYSA-M sodium;4-methylbenzenesulfonate Chemical compound [Na+].CC1=CC=C(S([O-])(=O)=O)C=C1 KVCGISUBCHHTDD-UHFFFAOYSA-M 0.000 claims abstract description 11
- 239000010440 gypsum Substances 0.000 claims abstract description 10
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 10
- 239000003513 alkali Substances 0.000 claims abstract description 9
- 239000010881 fly ash Substances 0.000 claims abstract description 8
- 239000012190 activator Substances 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 235000019353 potassium silicate Nutrition 0.000 claims description 8
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 239000011734 sodium Substances 0.000 claims description 4
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 3
- 238000003723 Smelting Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 239000000779 smoke Substances 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 239000002912 waste gas Substances 0.000 claims description 3
- 239000002956 ash Substances 0.000 claims description 2
- 239000002585 base Substances 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 7
- 150000002500 ions Chemical group 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 abstract description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000000292 calcium oxide Substances 0.000 description 9
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 9
- 239000011575 calcium Substances 0.000 description 5
- 230000002401 inhibitory effect Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 229910052791 calcium Inorganic materials 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 229910052925 anhydrite Inorganic materials 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000010883 coal ash Substances 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910020489 SiO3 Inorganic materials 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- AGWMJKGGLUJAPB-UHFFFAOYSA-N aluminum;dicalcium;iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Ca+2].[Ca+2].[Fe+3] AGWMJKGGLUJAPB-UHFFFAOYSA-N 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 229910052909 inorganic silicate Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 235000019976 tricalcium silicate Nutrition 0.000 description 1
- 229910021534 tricalcium silicate Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 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
- C04B28/006—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 mineral polymers, e.g. geopolymers of the Davidovits type
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Engineering & Computer Science (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The invention belongs to the technical field of preparation of roadbed materials, and provides a high-strength red mud-based solid waste roadbed material for solving the problems of low utilization rate of red mud and the like. The material is formed by mixing main materials and auxiliary materials, wherein the main materials are mixed by taking a high-strength red mud-based solid waste roadbed material as a calculation reference according to the following weight percentage: 40-50% of red mud; 15-20% of fly ash; 15-20% of desulfurized gypsum; 10-15% of silica fume powder; 5-8% of auxiliary materials; the auxiliary material is a mixture of an alkali activator and a regulator. The polyvinyl alcohol improves the bonding strength of the red mud base material, inhibits the saltpetering effect of the red mud base material, and keeps the compressive strength of the red mud base material unchanged; sodium methyl benzenesulfonate passing Na+、Ca2+The ions exchange with each other to absorb free CaO and inhibit the micro-expansion of the inner layer of the roadbed.
Description
Technical Field
The invention belongs to the technical field of preparation of roadbed materials, and particularly relates to a high-strength red mud-based solid waste roadbed material.
Background
The production of aluminum oxide by bauxite can produce a large amount of by-product solid waste, which is called red mud because the contents of calcium oxide, aluminum oxide and iron oxide are more, and the iron oxide is red and the whole solid waste is red at the same time. A large amount of red mud is stacked, which not only occupies the field, but also pollutes the environment. The red mud is used as a main material, other solid waste materials and efficient chemical additives are added to construct a highway subgrade, a high-strength and stable highway foundation is formed, a huge amount of red mud and other solid waste can be consumed, waste is changed into valuable, the pollution to the environment can be greatly eliminated, and the method has important social, economic and ecological significance.
Disclosure of Invention
The invention provides a high-strength red mud-based solid waste roadbed material, aiming at solving the problem of low utilization rate of the red mud at present.
The invention is realized by the following technical scheme: the high-strength red mud-based solid waste roadbed material is prepared by mixing main materials and auxiliary materials, wherein the main materials are mixed by the following raw materials in percentage by weight based on the calculation of the high-strength red mud-based solid waste roadbed material: 40-50% of red mud, 15-20% of fly ash, 15-20% of desulfurized gypsum, 10-15% of silica fume powder and 5-8% of auxiliary materials; the auxiliary material is a mixture of an alkali activator and a regulator.
The alkali activator is formed by mixing 1.5-2.0 of modulus, 75% of water glass by weight percent and 20% of calcium sulphoaluminate by weight percent by taking auxiliary materials as calculation references; the regulator is prepared by mixing 2 weight percent of polyvinyl alcohol and 3 weight percent of sodium p-toluenesulfonate based on the calculation reference of auxiliary materials.
The silicon ash powder is formed by collecting and treating smoke escaping with waste gas in the process of smelting industrial silicon and ferrosilicon at high temperature by an industrial electric furnace.
The alkali activator of the invention is prepared from water glass (NaSiO)3·9H2O modulus of 1.5-2.0) 75%, calcium sulfoaluminate (3 CaO 3 Al)2O3·CaSO4) 20% of the total composition. The water glass can be hydrolyzed to generate NaOH, and the NaOH reacts with calcium sulphoaluminate to generate an alkali activator Na2O, also Ca (OH)2Promoting Al2O3、SiO2、Fe2O3The effective components generate tricalcium silicate (3 CaO. SiO) in a certain time2) Dicalcium silicate (2 CaO. SiO)2) Aluminate IIICalcium (3 CaO. Al)2O3) Tetracalcium aluminoferrite (4 CaO. Al)2O3·Fe2O3) And generating gel substances, and then performing hydration reaction to further generate substances such as C-S-H, C-A-H and the like to form the high-strength red mud base roadbed cushion layer. The chemical reactions involved are as follows:
(1) hydrolysis of water glass: na (Na)2SiO3 + 2H2O → NaH3SiO4 + NaOH；
(2) Reaction of the product NaOH with calcium sulphoaluminate: 3CaO 3Al2O3·CaSO4 + 8NaOH → 4Ca(OH)2 + 3Na2O + 3Al2O3 + 3Na2SO4。
The regulator is an effective auxiliary additive and consists of polyvinyl alcohol accounting for 2 percent of the weight of the whole auxiliary material and sodium methyl benzene sulfonate accounting for 3 percent of the weight of the whole auxiliary material. The polyvinyl alcohol has the effects of improving the bonding strength of the red mud base material, making up gaps among solid waste particles, inhibiting the saltpetering effect of the red mud base material and keeping the compressive strength of the roadbed unchanged; the sodium p-toluenesulfonate is formed by Na+、Ca2+The ions exchange with each other to absorb free CaO, thereby inhibiting the micro-expansion of the roadbed inner layer. The polyvinyl alcohol and the sodium methyl benzene sulfonate are dissolved by stirring with water of 70-80 ℃ in advance, and then are uniformly mixed with water glass and sodium sulphoaluminate with a proper amount of water for use.
The polyvinyl alcohol improves the bonding strength of the red mud base material, inhibits the saltpetering effect of the red mud base material and keeps the compressive strength of the red mud base material unchanged; sodium methyl benzenesulfonate passing Na+、Ca2+The ions exchange with each other to absorb free CaO and inhibit the micro-expansion of the inner layer of the roadbed.
The detection shows that the high-strength red mud-based solid waste roadbed material has good cost performance, improves the bonding strength of the red mud base material, obviously inhibits the saltpetering effect of the red mud base material, and keeps the compressive strength of the roadbed unchanged; inhibiting the micro-expansion of the inner layer of the roadbed.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs and the disclosures and references cited herein and the materials to which they refer are incorporated by reference.
Those skilled in the art will recognize that equivalents to the specific embodiments described, as may be learned by routine experimentation, are intended to be encompassed by the present application.
The experimental procedures in the following examples are conventional unless otherwise specified. The instruments used in the following examples, unless otherwise specified, were all conventional laboratory instruments; the experimental materials used in the following examples were purchased from a general biochemical reagent store unless otherwise specified.
Example (b): a high-strength red mud-based solid waste roadbed material comprises a main material and an auxiliary material. The main materials comprise 40-50% of red mud, 15-20% of fly ash, 15-20% of desulfurized gypsum and 10-15% of silica fume powder, and the auxiliary materials comprise 5-8% of alkali excitant and regulator, wherein the silica fume powder is formed by collecting and treating smoke dust escaping along with waste gas in the process of smelting industrial silicon and ferrosilicon at high temperature by an industrial electric furnace through a special collecting device.
The regulator is an effective auxiliary additive and consists of polyvinyl alcohol accounting for 2 percent of the weight of the whole auxiliary material and sodium methyl benzene sulfonate accounting for 3 percent of the weight of the whole auxiliary material. The polyvinyl alcohol has the functions of improving the bonding strength of the red mud base material, inhibiting the saltpetering effect of the red mud base material and keeping the compressive strength of the red mud base material unchanged; the sodium methyl benzene sulfonate acts through Na+、Ca2+The ions exchange with each other to absorb free CaO and inhibit the micro-expansion of the inner layer of the roadbed. The polyvinyl alcohol and the sodium methyl benzene sulfonate are stirred by water with the temperature of 70-80 ℃ in advanceDissolving, and mixing with water glass, sodium sulfoaluminate and appropriate amount of water.
The specific verification test:
1. red mud, fly ash, desulfurized gypsum, silica fume powder and auxiliary materials, wherein the auxiliary materials comprise water = 50:15:15:10:5: 5; the results show that: maximum dry density: 1.09g/cm3(ii) a Unconfined compressive strength for 7 days: 3.56 MPa; unconfined compressive strength for 28 days: 6.52 MPa.
2. Red mud, fly ash, desulfurized gypsum, silica fume powder and auxiliary materials, wherein the auxiliary materials comprise water = 55:15:10:10:5: 5; the results show that: maximum dry density: 1.07g/cm3(ii) a Unconfined compressive strength for 7 days: 3.37 MPa; unconfined compressive strength for 28 days: 6.24 MPa.
3. Red mud, fly ash, desulfurized gypsum, silica fume powder and auxiliary materials, wherein the auxiliary materials comprise water = 55:20:10:5:5: 5; the results show that: maximum dry density: 1.08g/cm3(ii) a Unconfined compressive strength for 7 days: 3.26 MPa; unconfined compressive strength for 28 days: 6.08 MPa.
4. Red mud, coal ash, desulfurized gypsum, silica fume and auxiliary materials, namely water, wherein the ratio of the auxiliary materials to the water is 60:15:10:5: 5; the results show that: maximum dry density: 1.07g/cm3(ii) a Unconfined compressive strength for 7 days: 3.48 MPa; unconfined compressive strength for 28 days: 6.35 MPa.
5. Red mud, coal ash, desulfurized gypsum, silica fume and auxiliary materials, namely water, wherein the ratio of the auxiliary materials is 60:10:10:10:5: 5; the results show that: maximum dry density: 1.10g/cm3(ii) a Unconfined compressive strength for 7 days: 3.79 MPa; unconfined compressive strength for 28 days: 6.68 MPa.
Comparative test conditions: 40-50% of red mud as solid waste component, 15-20% of fly ash, 15-20% of desulfurized gypsum, 10-15% of silica fume powder and 5-8% of water glass, mixing and compacting according to different proportions according to the method of the Ministry of people's republic of China's recommended Standard for construction of road base course (JTG/T F20-2015), respectively measuring unconfined compressive strength for 7 days, the formula test result of the invention and the unconfined compressive strength of the cement stabilizing material in the 7d age are shown in table 1, the unconfined compressive strength standard of the cement stabilizing material in the 7d age is shown in table 2, and the combination of the result in table 1 and the standard in table 2 shows that the roadbed solid waste material has good cost performance, improves the bonding strength of the red mud base material, inhibits the saltpetering effect of the red mud base material, and keeps the compressive strength of the roadbed unchanged; inhibiting the micro-expansion of the inner layer of the roadbed.
Table 1: experimental result for comparing unconfined compressive strength of 7d age
Table 2: 7d age unconfined compressive strength standard R of cement stabilizing materiald(MPa)
Note that (1) when the road grade is high, or the traffic load grade is high, or the structural safety requirement is high, the upper limit strength standard is recommended.
(2) The strength criteria in the table refer to a representative value of unconfined compressive strength at age 7 d.
Standard test blocks (150 multiplied by 150) are prepared according to different formulas of the main raw materials, and according to GB/T50081-2002 'test method for mechanical properties of common concrete' and GB/T50107-2010 'test and evaluation standards for concrete properties', the volume expansion rate and the alkali bleeding rate are measured after the concrete is maintained in a standard curing room with the temperature of 20 ℃ and the humidity of 95% for 28 days, and the results shown in Table 3 are obtained. The beneficial effects obtained by adding the auxiliary materials of polyvinyl alcohol and sodium methyl benzene sulfonate are fully illustrated.
Table 3: verification results of volume expansion rate and saltpetering rate
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (3)
1. A high-strength red mud-based solid waste roadbed material is characterized in that: the material is formed by mixing main materials and auxiliary materials, wherein the main materials are mixed by the following raw materials in percentage by weight based on the calculation of the high-strength red mud-based solid waste roadbed material: 40% -50% of red mud; 15-20% of fly ash; 15-20% of desulfurized gypsum; 10-15% of silica fume powder; 5-8% of auxiliary material, wherein the auxiliary material is a mixture of alkali activator and regulator.
2. The high-strength red mud-based solid waste roadbed material according to claim 1, wherein the roadbed material is characterized in that: the alkali activator is prepared by mixing 1.5-2.0 of modulus, 75% of water glass by weight percentage and 20% of sodium sulphoaluminate by weight percentage by taking auxiliary materials as calculation references; the regulator is prepared by mixing 2% by weight of polyvinyl alcohol and 3% by weight of sodium methyl benzene sulfonate based on the calculation of auxiliary materials.
3. The high-strength red mud-based solid waste roadbed material of claim 1, wherein the material is characterized in that: the silicon ash powder is formed by collecting and treating smoke escaping with waste gas in the process of smelting industrial silicon and ferrosilicon at high temperature by an industrial electric furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210267386.7A CN114644483A (en) | 2022-03-18 | 2022-03-18 | High-strength red mud-based solid waste roadbed material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210267386.7A CN114644483A (en) | 2022-03-18 | 2022-03-18 | High-strength red mud-based solid waste roadbed material |
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| CN114644483A true CN114644483A (en) | 2022-06-21 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108424047A (en) * | 2018-03-13 | 2018-08-21 | 山东大学 | A kind of red mud base rapid hardening injecting paste material administered suitable for sandy soil stratum grouting and reinforcing |
| CN111847995A (en) * | 2020-05-28 | 2020-10-30 | 山东高速集团有限公司 | Red mud-based solid waste pervious concrete and preparation method and application thereof |
-
2022
- 2022-03-18 CN CN202210267386.7A patent/CN114644483A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108424047A (en) * | 2018-03-13 | 2018-08-21 | 山东大学 | A kind of red mud base rapid hardening injecting paste material administered suitable for sandy soil stratum grouting and reinforcing |
| CN111847995A (en) * | 2020-05-28 | 2020-10-30 | 山东高速集团有限公司 | Red mud-based solid waste pervious concrete and preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 李晓燕等: "《混凝土外加剂及其改性制备研究》", 31 May 2017, 江西科学技术出版社 * |
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