CN113277780A - Curing agent based on biomass waste rice hull ash and road-using method - Google Patents
Curing agent based on biomass waste rice hull ash and road-using method Download PDFInfo
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- CN113277780A CN113277780A CN202110390343.3A CN202110390343A CN113277780A CN 113277780 A CN113277780 A CN 113277780A CN 202110390343 A CN202110390343 A CN 202110390343A CN 113277780 A CN113277780 A CN 113277780A
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- WNCYAPRTYDMSFP-UHFFFAOYSA-N calcium aluminosilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O WNCYAPRTYDMSFP-UHFFFAOYSA-N 0.000 description 1
- 229940078583 calcium aluminosilicate Drugs 0.000 description 1
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- JLDKGEDPBONMDR-UHFFFAOYSA-N calcium;dioxido(oxo)silane;hydrate Chemical compound O.[Ca+2].[O-][Si]([O-])=O JLDKGEDPBONMDR-UHFFFAOYSA-N 0.000 description 1
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- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
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Images
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
- C04B28/001—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
-
- 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
- E01C21/00—Apparatus or processes for surface soil stabilisation for road building or like purposes, e.g. mixing local aggregate with binder
-
- 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
- E01C3/04—Foundations produced by 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
- C04B2111/00732—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
- 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
- C04B2111/00767—Uses not provided for elsewhere in C04B2111/00 for waste stabilisation purposes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Architecture (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a curing agent based on biomass waste rice hull ash and a road using method, wherein the curing agent comprises rice hull ash, carbide slag and metakaolin, and the dry mass ratio of the rice hull ash to the carbide slag to the metakaolin is 30-45:35-45: 15-30. And (3) mixing and stirring all powdery materials of the curing agent uniformly, uniformly mixing the curing material and the soil to be cured with a specific water content, compacting to a specific dry density, and curing for more than 7 days to be used for roadbed engineering. The special soil/polluted soil solidified by the novel waste-based curing agent has the advantages of high early strength, good water stability, good durability, simple components, convenience in operation and the like, and the main raw materials of the curing agent mainly comprise industrial waste, so that the curing agent is low in cost, green and environment-friendly, and contributes to promoting economic sustainable development and realizing a carbon neutralization target.
Description
Technical Field
The invention belongs to the field of geotechnical engineering, relates to the field of treatment of special soil/polluted soil, and particularly relates to a curing agent formula based on biomass waste rice hull ash and a road using method.
Background
Traffic engineering construction often encounters road indexes such as compactness, CBR, modulus of resilience and the like, which are required by the specifications and cannot be achieved in the soil filling engineering performance. In actual engineering, the soil body which cannot meet the requirements can only be treated by a abandoning method, so that resources are wasted, land is occupied, and transportation and maintenance costs are increased. And the areas often lack high-quality fillers such as natural gravel, broken stone and the like, great challenges are brought to the construction of high-grade highway engineering, and particularly under the trends of continuous enlargement of the scale of a road network and heavy load and high speed of driving, higher requirements are provided for the treatment technology of the roadbed by the engineering construction. Therefore, it is particularly important to cure the special soil/polluted soil with poor engineering performance to meet the road requirements.
At present, cement, lime and the like are mainly adopted as curing materials for special soil, polluted soil and other harmful soil, practice proves that the strength characteristic, the deformation characteristic and the stability of a soil body can be effectively improved by doping traditional curing materials such as the cement, the lime and the like, but the use of the cement and the lime not only greatly increases the engineering cost and causes the durability problems such as soil body cracking and the like, but also brings serious resource and energy consumption and environmental problems. The alkaline environment formed by cement soil also can seriously affect the growth of surrounding vegetation and the safety of underground water, and simultaneously has adverse effect on the service life of underground structures such as steel structures, concrete and the like. Therefore, the active research on economic, efficient and environment-friendly novel curing materials is not slow. In addition, the current economic development produces a large amount of industrial wastes, such as red mud produced in the process of preparing alumina, steel slag discharged from steel making, waste slag produced in acetylene synthesis, calcium carbide slag, biomass waste ash produced in biomass power plants by adopting rice hulls to generate electricity, rice hull ash, phosphogypsum, solid wastes discharged in the process of producing phosphate fertilizers and phosphoric acid, and the like. The comprehensive utilization rate of the bulk industrial wastes is extremely low, and a large amount of unconsumed wastes not only occupy the land, but also cause environmental problems such as surface water and underground water pollution and the like, thereby bringing heavy pressure to the environment. Therefore, the development of the curing material mainly comprising industrial and agricultural wastes can reduce the use of the traditional curing material, thereby reducing the engineering cost, resource consumption and environmental influence, effectively absorbing the wastes, and being beneficial to the sustainable development of low-carbon and environmental-protection industry.
Disclosure of Invention
The invention aims to overcome the defects of traditional curing materials such as cement, lime and the like, provides a waste-based novel curing material formula which can be applied to the field of geotechnical engineering and a using method for roads thereof, can effectively cure special soil/polluted soil and the like with poor engineering performance, enables the special soil/polluted soil and the like to meet the road requirements, and has both economic benefit and environmental benefit.
The technical scheme is as follows: in order to achieve the aim, the invention provides a curing agent based on biomass waste rice hull ash and a road-using method, and the specific scheme is as follows:
a curing agent based on biomass waste rice hull ash comprises rice hull ash, carbide slag and metakaolin, wherein the dry mass ratio of the rice hull ash to the carbide slag to the metakaolin is 30-45:35-45: 15-30.
Further, the curing agent based on the biomass waste rice hull ash contains active SiO2The content is more than 70 percent.
Further, the content of CaO in the carbide slag is more than 65% based on the curing agent of the biomass waste rice hull ash.
Further, the curing agent based on the biomass waste rice hull ash is Al in the metakaolin2O3And SiO2The total content of (A) is more than 75%.
Further, the curing agent based on the biomass waste rice husk ash is prepared by sieving the rice husk ash, the carbide slag and the metakaolin respectively with a sieve of 0.075 mm.
The road use method of the curing agent based on the biomass waste rice hull ash comprises the following steps:
(1) digging out special soil/polluted soil with engineering performance not meeting road standard, paving the dug-out soil, removing tree roots, turf and sundries in the soil, airing until the water content is lower than 5%, and crushing to obtain a soil body;
(2) after the acceptance of a roadbed lower bearing layer, uniformly mixing the curing agent of claim 1 with a soil body;
(3) paving the mixture of the curing agent and the soil which are evenly mixed, stabilizing and roughly leveling the mixture by using a bulldozer, leveling the mixture by using a leveler, scraping out road arches, finally compacting the mixture by using a road roller until the compactness reaches the compactness specified by the specification and the dry density reaches the dry density corresponding to the specified compactness, and finally maintaining the mixture for more than 7 days.
Further, in the road use method of the curing agent based on the biomass waste rice hull ash, the adding mass of the curing agent in the step (2) is 15-20% of the mass of the dry soil.
Further, according to the road method for the curing agent based on the biomass waste rice hull ash, in the step (2), the curing agent and the soil body are uniformly mixed, the water content needs to be controlled, and the water content is finally controlled to be 15% -25% by adopting an indoor heavy compaction test.
Furthermore, during the curing period of curing the soil by adopting the novel curing agent, waterproof and antifreezing measures are set so as to prevent the soil body from not obtaining strength and being disintegrated by soaking or generating frost heaving to crack the road surface.
The rice hull ash is biomass waste ash generated after the power plant adopts rice hulls to generate power. The temperature of the rice hull is maintained at about 600 ℃ in the process of converting the rice hull into the rice hull ash, and the components of the rice hull are mainly active SiO2The content is more than 70 percent to 90 percent.
The carbide slag is waste generated in acetylene production, and is white powder obtained after dehydration treatment, wherein the main component of the white powder is CaO, and the content of the CaO is more than 65%.
The metakaolin is prepared from 60% of kaolinAn amorphous aluminum silicate with thermodynamic metastable state formed by dehydration at 0-900 deg.C and Al as main ingredient2O3，SiO2The content is more than 75 percent, and the fineness is 400 meshes.
The rice hull ash, the carbide slag and the metakaolin are dried/dried and crushed powdery materials and can be respectively sieved by a 0.075mm sieve.
The optimization of the proportion of the curing agent mainly takes the engineering cost into consideration (1); (2) the construction is convenient; (3) curing effect; (4) environmental impact. Considering that the rice hull ash and the carbide slag are industrial wastes, the purchase cost is low, the waste digestion has obvious environmental benefits, the metakaolin has higher purchase price, and the novel curing agent material mainly takes the rice hull ash and the carbide slag as wastes and is doped with a small amount of metakaolin. Meanwhile, in an indoor unit body test, a 7d water immersion unconfined compressive strength test shows that the cured soil of the novel curing agent of the rice hull ash, the carbide slag and the metakaolin can achieve the best curing effect under a specific mixing ratio. The three materials are powdery materials, so that the roadbed is not different from normal roadbed filling, and the construction is convenient.
The curing agent provided by the invention mainly has the following mechanism: the rice hull ash contains active SiO as main component2The content is more than 70 percent; the main component of the carbide slag is CaO, and the content is more than 65 percent; metakaolin mainly comprises Al2O3，SiO2The content is more than 75 percent. Mixing the solidifying agent and soil, adding water to obtain the mixture with optimal water content, and mixing with the skeleton of rice husk ash and nano-class SiO2The particles will engage and fill between the soil particles. Then CaO in the carbide slag and water react chemically to generate OH-And Ca2+Ca as shown in the formulas (1) and (2)2+Contact with CO in air2Post-crystallization to form compact CaCO3And the soil particles are attached and wrapped on the soil particles, so that the acting force between the soil particles is increased. In addition, under the strong alkaline environment created by OH < - >, active Al in the rice hull ash and the metakaolin2O3，SiO2Hydrolysis takes place, and excess Ca2+Chemically reacting to form gelling substances, calcium silicate hydrate (C-S-H) and calcium aluminosilicate hydrate (C-A-S-H), as shown in formula (3) (4)(5) As shown. Small amount of Al in pore liquid2O3AlO can be added after hydrolysis2 -Is present in the form of an excess of AlO2 -，OH-The reaction produced ettringite (Aft), as shown in formulas (6), (7) and (8). The cementitious hydration products are filled among soil particles, so that the soil body is more stable and compact, and has better mechanical properties.
CO2+H2O→CO3 2-+H+ (1)
CO3 2-+Ca2+→CaCO3 (2)
SiO2+Ca(OH)2+H2O→CaO·SiO2·xH2O (3)
Al2O3+Ca(OH)2+H2O→CaO·Al2O3·xH2O (4)
Al2O3+Ca(OH)2+2SiO2+3H2O→CaO·Al2O3·2SiO3·4H2O (5)
Has the advantages that:
compared with the existing curing material, the special soil/polluted soil cured by the novel waste-based curing agent has the advantages of high early strength, good water stability, good durability, simple components, convenience in operation and the like, and the curing agent is mainly prepared from industrial waste, is low in cost, is green and environment-friendly, and is beneficial to promoting the sustainable development of economy in China and realizing the carbon neutralization target.
Drawings
FIG. 1 is a schematic illustration of the paving process for a curing agent formulation provided herein;
Detailed Description
The invention will be further elucidated with reference to the drawing.
The invention provides a novel curing agent based on biomass waste rice hull ash, which mainly comprises the rice hull ash, carbide slag and metakaolin. Respectively mixing and uniformly stirring the rice hull ash, the carbide slag and the metakaolin according to the dry mass ratio of 30-45:35-45: 15-30. Wherein the adopted rice hull ash is biomass waste ash generated after power generation of a power plant by adopting rice hulls, the temperature of the rice hulls is maintained at about 600 ℃ in the process of converting the rice hulls into the rice hull ash, and the components of the rice hull ash are mainly active SiO2The content is more than 70 percent. The used carbide slag is waste generated in acetylene production, and white powder obtained after dehydration treatment mainly contains CaO with the content of more than 65%. The metakaolin is amorphous aluminum silicate which is formed by taking kaolin as a raw material and dehydrating at the temperature of 600-900 ℃, and the main component of the amorphous aluminum silicate is Al2O3，SiO2The content is more than 75 percent, and the fineness is 400 meshes. The rice hull ash, the carbide slag and the metakaolin are crushed and dried in the sun, respectively sieved by a 0.075mm sieve, and then mixed according to the dry mass ratio of the rice hull ash, the carbide slag and the metakaolin of 30-45:35-45:15-30 to obtain the curing agent.
The road use method of the curing agent based on the biomass waste rice husk ash comprises the following steps:
(1) digging out special soil/polluted soil with field engineering performance not meeting road standard, paving the dug-out soil, removing tree roots, turf and impurities in the soil, airing until the water content is lower than 5%, and crushing to obtain a soil body;
(2) after the roadbed lower bearing layer is checked and accepted, the curing agent and the soil are stirred uniformly as much as possible, and water is sprayed while mixing, wherein the total amount of the sprayed water is the optimal water content obtained in a curing agent-soil indoor heavy compaction test, and is generally 15-25%;
(3) paving the curing agent-soil mixture which is evenly mixed, stabilizing and roughly leveling the mixture by using a bulldozer, leveling the mixture by using a leveler, scraping out road arches, finally compacting the mixture by using a road roller until the compactness reaches the compactness specified by the specification, and maintaining the mixture for more than 7 days.
During the curing period of curing soil by adopting the curing agent, waterproof and antifreezing measures are set so as to prevent the soil body from not obtaining strength, and the soil body is soaked in water to disintegrate or generates frost heaving to crack the road surface.
The whole process is shown in figure 1. The following is further illustrated by the examples:
examples 1 to 4
Examples 1 to 4 provide a curing agent comprising rice hull ash, carbide slag and metakaolin, wherein the dry mass ratio of the rice hull ash, the carbide slag and the metakaolin used in example 1 is 30:35:15, the dry mass ratio of the rice hull ash, the carbide slag and the metakaolin used in example 2 is 35:41:22, the dry mass ratio of the rice hull ash, the carbide slag and the metakaolin used in example 3 is 41:42:26, and the dry mass ratio of the rice hull ash, the carbide slag and the metakaolin used in example 4 is 45:45:30, and the curing agent is obtained by uniformly mixing the components.
The curing agent provided in example 1 was subjected to a pavement curing test according to the pavement method described above, and the soil body strengthening effect of the curing agent of the present invention was evaluated by using a 7-day water-soaked unconfined compressive strength q according to the soil curing agent application technical guideline. Firstly, crushing, drying and sieving the marine soft clay with the engineering performance not meeting the road index, respectively carrying out an indoor heavy compaction test on the modified rice hull ash, 5% cement, 9% quicklime solidified soil and the uncured marine soft clay according to the geotechnical test method standard GB T50123-2019, and compacting according to three layers under 98 times per layer to obtain the optimal water content and the maximum dry density of different mixtures. Then, mixing the soft clay with the optimal water content, sealing the materials for 24 hours, respectively adding the curing agent, the cement and the lime according to the mixture ratio, and uniformly mixing the components. And preparing a sample of the uniformly mixed mixture by a static pressure method, weighing the material with 96% of compactness, carrying out static pressure forming, demoulding and curing for 7 d. And finally, dividing the samples into two identical batches when maintaining for 7d, continuously maintaining for 24h for one batch, submerging the samples in a water tank for 24h, taking out all the samples, and performing an unconfined compression test to obtain the strength, the water immersion strength and the water stability of the different solidified material reinforced soil. Wherein, the water stability is the ratio of the soaking strength to the normal curing strength.
The test data are shown in Table 1. It can be seen that the unreinforced soil has low strength and disintegrates directly in water, especially in the case of immersion. The modified rice hull ash reinforced soil obviously improves the strength and the water stability of the soft clay, and the 7d unconfined compressive strength is improved by two times and has good water stability. The contrast cement and the lime reinforced soil can be found, although the strength of the soil body can be improved by the contrast cement and the lime reinforced soil, the development of the early strength of the lime reinforced soil is slow, and the cement reinforced clay has poor water stability, and can generate micro cracks after being soaked, so that the strength is seriously reduced. In conclusion, the curing agent provided by the invention has a good reinforcing effect on soil bodies, and is superior to the traditional cement and lime reinforced soil.
TABLE 1 Strength and Water stability of different cured materials reinforced soil
In addition, the pavement performance of the novel modified rice hull ash solidified material reinforced soil provided by the invention is evaluated by adopting an indoor CBR test. On the basis of obtaining the optimal water content and the maximum dry density in the compaction test, the water immersion expansibility and the road index CBR before and after soft clay reinforcement are evaluated according to GB T50123 and 2019 geotechnical test method Standard. The result shows that the soaking expansion rate of the unreinforced soil can reach more than 5.68 percent, the CBR value is 5.2 percent and is lower than 8 percent specified by JTGD30-2015 of highway subgrade design specifications, and the requirement of subgrade filling is not met. The water-soaking expansion rate of the novel solidified material reinforced soil provided by the invention can be reduced to 0.025%, and the CBR value can reach 193%, which is far higher than the CBR value of unreinforced soil and the minimum value specified by highway subgrade design specification JTGD 30-2015.
Claims (8)
1. The curing agent based on the biomass waste rice hull ash is characterized by comprising the rice hull ash, carbide slag and metakaolin, wherein the dry mass ratio of the rice hull ash to the carbide slag to the metakaolin is 30-45:35-45: 15-30.
2. The curing agent based on biomass waste rice hull ash according to claim 1, wherein the rice hull ash contains active SiO2The content is more than 70 percent.
3. The curing agent based on biomass waste rice hull ash according to claim 1, wherein the content of CaO in the carbide slag is more than 65%.
4. The curing agent based on biomass waste rice hull ash according to claim 1, wherein Al in metakaolin is2O3And SiO2The total content of (A) is more than 75%.
5. The curing agent based on the biomass waste rice husk ash as claimed in claim 1, wherein the rice husk ash, the carbide slag and the metakaolin are respectively sieved by a 0.075mm sieve.
6. The method for using the curing agent based on the biomass waste rice hull ash as claimed in claim 1, which is characterized by comprising the following steps:
(1) digging out special soil/polluted soil with engineering performance not meeting road standard, paving the dug-out soil, removing tree roots, turf and sundries in the soil, airing until the water content is lower than 5%, and crushing to obtain a soil body;
(2) after the acceptance of a roadbed lower bearing layer, uniformly mixing the curing agent of claim 1 with a soil body;
(3) paving the mixture of the curing agent and the soil which are evenly mixed, stabilizing and roughly leveling the mixture by using a bulldozer, leveling the mixture by using a leveler, scraping out road arches, finally compacting the mixture by using a road roller until the compactness reaches the compactness specified by the specification and the dry density reaches the dry density corresponding to the specified compactness, and finally maintaining the mixture for more than 7 days.
7. The method for using the curing agent based on the biomass waste rice hull ash as claimed in claim 6, wherein the curing agent is added in the step (2) in an amount of 15-20% by mass based on the dry soil.
8. The road method for the curing agent based on the biomass waste rice hull ash as claimed in claim 6, wherein the curing agent and the soil body are uniformly mixed in the step (2) and the water content is controlled, wherein the water content is controlled by uniformly mixing the curing agent and the soil body and finally controlling the water content to be 15% -25% by adopting an indoor heavy compaction test.
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| CN114292055A (en) * | 2022-01-05 | 2022-04-08 | 国能生物发电集团有限公司 | Light roadbed filling material and preparation method thereof |
| CN115677244A (en) * | 2022-07-15 | 2023-02-03 | 湖北工业大学 | Curing agent and cured silt soil |
| CN115769776A (en) * | 2022-12-09 | 2023-03-10 | 天津中岩大地材料科技有限公司 | Ecological soil for greening and reinforcing side slope |
| CN116003037A (en) * | 2023-01-16 | 2023-04-25 | 东华大学 | Solid waste base high-water-content soft soil curing agent and curing device |
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