CN115417652B - Yellow-flood-area silt soil solid waste-based soil curing agent and application thereof - Google Patents
Yellow-flood-area silt soil solid waste-based soil curing agent and application thereof Download PDFInfo
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- CN115417652B CN115417652B CN202210847861.8A CN202210847861A CN115417652B CN 115417652 B CN115417652 B CN 115417652B CN 202210847861 A CN202210847861 A CN 202210847861A CN 115417652 B CN115417652 B CN 115417652B
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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
- C04B28/144—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 a flue gas desulfurization product
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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- 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
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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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
- 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
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- 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)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention relates to the technical field of road engineering materials, in particular to a yellow-flood-area silt soil solid waste-based soil curing agent and application thereof. 25-40 parts of blast furnace slag, 25-50 parts of fly ash, 2-15 parts of desulfurized gypsum, 5-15 parts of titanium gypsum, 25-40 parts of ordinary Portland cement, and diethanol monoisopropanolamine, wherein the weight parts of the diethanol monoisopropanolamine are eighteen parts per million of the total dry mass of the powder, and the weight parts of the surfactant are 1-10% of the total dry mass of the powder. The solid waste material and the cement are mixed, so that the solid waste material and the cement are mutually cooperated, and the strength of the solidified soil body is improved; the binding capacity of the silt material is increased through the titanium gypsum, and the brittleness of the material is reduced; the strength of the curing agent can be improved by the exciting agent at the early stage and the later stage, so that the water stability is improved; meanwhile, the less blending amount can meet the condition that the performance meets the requirement, thereby greatly reducing the cost and effectively protecting the environment.
Description
Technical Field
The invention relates to the technical field of road engineering materials, in particular to a yellow-flood-area silt soil solid waste-based soil curing agent and application thereof.
Background
The disclosure of this background section is only intended to increase the understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art already known to those of ordinary skill in the art.
On the impact plain of the yellow flood area, the large-area soil is mainly made of silt, the roadbed strength is low, the construction and rolling are very difficult, the roadbed area is generally required to be solidified in road construction in order to improve the roadbed bearing capacity, but the existing silt roadbed soil is generally solidified by taking cement and lime as solidification materials, and the problems of high cost, easy shrinkage and cracking, imperfect solidification silt construction technology and quality control and the like exist. The soil curing agent in the market needs to be matched with a large amount of cement for use, so that the cost is high, and the soil curing agent is difficult to popularize and use in the road subgrade construction process. In addition, with the development of technology, a large amount of industrial solid wastes such as blast furnace slag, fly ash and the like are generated, and the stockpiling of a large amount of industrial solid wastes causes serious environmental pollution and resource waste, so that the resource utilization of the large amount of solid wastes is urgent.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention aims to provide the yellow-flood-area silt solid waste-based soil curing agent and the application thereof, which not only solve the problem of utilizing a large amount of solid waste, reduce the cost and protect the environment, but also improve the overall strength and the water stability through the selection and the combination of raw materials.
In order to achieve the above object, the technical scheme of the present invention is as follows:
in a first aspect of the invention, a yellow-flood-area silt soil solid waste-based soil curing agent is provided, which is prepared from the following components in parts by weight:
25-40 parts of blast furnace slag, 25-50 parts of fly ash, 2-15 parts of desulfurized gypsum, 5-15 parts of titanium gypsum, 25-40 parts of ordinary Portland cement, diethanol monoisopropanolamine, wherein the weight parts of the diethanol monoisopropanolamine are one ten thousandth to eighteen ten thousandth of the total dry mass parts of all powder, and the weight parts of the surfactant are 1-10% of the total dry mass parts of all powder.
In a second aspect of the invention, a preparation method of a yellow-flood-area silt solid waste-based green soil curing agent is provided:
(1) Drying blast furnace slag, fly ash, desulfurized gypsum and titanium gypsum by adopting an oven, grinding, and sieving respectively;
(2) Weighing blast furnace slag, fly ash, desulfurized gypsum and titanium gypsum according to a proportion, carrying out dry mixing to obtain a dry-mixed mixture, and adding diethanol monoisopropanolamine and a surfactant into water to prepare an excitant and surfactant aqueous solution;
when the soil body is solidified, the dry-mixed mixture and water are mixed and subjected to material smoldering, and the material smoldering time is operated according to the test procedure of inorganic binder stabilization materials for highway engineering (JTGE 51-2009); and mixing the ordinary Portland cement, the exciting agent and the surfactant aqueous solution within 1h before molding.
In a third aspect of the invention, there is provided the use of the yellow soil-working waste-based green soil solidifying agent of the first aspect in soil solidification.
The specific embodiment of the invention has the following beneficial effects:
in the yellow-flood-area silt soil solid waste-based green soil curing agent provided by the invention, solid waste materials and cement are mixed, so that the solid waste materials and the cement are mutually cooperated, the strength of a cured soil body is improved, and the preparation method is simple and easy to operate.
The blast furnace slag, the fly ash and the desulfurized gypsum adopt solid wastes, and the strength and the performance of the curing agent are weaker than those of cement due to the mixing of the solid wastes; the desulfurization gypsum is added, thereby increasing the generation of ettringite, playing a better role in pore filling, improving the strength of the modified powder soil, in addition, the ion exchange effect exists, and reducing the thickness of a water film on the surface of soil particles; the utilization rate of the solid waste materials is brought into play to a greater extent according to the material characteristics, and the effects of reducing the cost and protecting the environment are achieved.
In addition, for the solid waste-based soil curing agent, the early strength effect is obvious, the later strength is not greatly improved, the content of the internal hydrated calcium silicate is improved by adding the diethanol monoisopropanolamine, the early strength and the later strength can be considered, the strength of the curing agent can be improved, and the water stability is improved; meanwhile, the less blending amount can meet the condition that the performance meets the requirement, and the cost is greatly reduced.
The titanium gypsum has certain viscosity, the cohesiveness of the powder clay is weaker, the clay mineral content is low, and the problem that the main component is primary mineral can be effectively improved; in addition, the addition of the curing agent can lead the cured soil to show brittle deformation, and the addition of the titanium gypsum can effectively relieve the brittle deformation of the modified soil and reduce the cracking of the modified soil.
The yellow-area silt solid waste-based green soil curing agent material provided by the invention adopts blast furnace slag, fly ash and other bulk industrial solid wastes, is low in cost, effectively solves the problem of mass solid waste decrement utilization, reduces the cost of a cured soil body, and reduces the cost by about 1-20% compared with 4% cement. And simultaneously, the environment is effectively protected.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. 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 application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
In one embodiment of the invention, the invention provides a yellow-flood-area silt soil solid waste-based soil curing agent which is prepared from the following components in parts by weight:
25-40 parts of blast furnace slag, 25-50 parts of fly ash, 2-15 parts of desulfurized gypsum, 5-15 parts of titanium gypsum, 25-40 parts of ordinary Portland cement, diethanol monoisopropanolamine, wherein the weight parts of the diethanol monoisopropanolamine are eighteen parts per million of the sum of the weight parts of the blast furnace slag, the fly ash, the desulfurized gypsum and the ordinary Portland cement, and the weight parts of the surfactant are 1-10% of the sum of the weight parts of the blast furnace slag, the fly ash, the desulfurized gypsum and the ordinary Portland cement.
In some embodiments of the invention, the blast furnace slag is in a dry and ground state having a particle size of no greater than 0.075mm and a calcium oxide content of about 30-50%; the blast furnace slag is white powdery industrial waste discharged from a blast furnace during pig iron smelting, has potential hydraulic gelation property, and can show hydraulic gelation property under the action of cement clinker, lime and gypsum.
In some embodiments of the invention, the fly ash has a particle size of no greater than 400 mesh and comprises, as a major component, silica, alumina, iron oxide, calcium oxide, sulfur trioxide, and the like. Wherein the content of calcium oxide is 10-15%; fly ash is tiny ash particles discharged in the coal burning process of a thermal power plant, is the most widely used industrial solid waste at present, and has potential hydraulic property.
In some embodiments of the invention, the desulfurized gypsum is in a state of being dried, crushed and ground, and has a particle size of not more than 0.075mm, wherein the content of calcium oxide is 30-50%, and the content of sulfur trioxide is 30-50%; the desulfurization gypsum is a wet powdery industrial waste obtained in the desulfurization process of the flue gas of the coal burning of the power plant.
In some embodiments of the invention, the titanium gypsum is in a dried, ground and crushed state, and has a particle size of 0.1-2mm.
In some embodiments of the invention, the portland cement is one of model numbers P.O, 42.5, P.O, 52.5, P.O, 62.5; further P.O 42.5.5.
In some embodiments of the invention, the surfactant is triethanolamine or triisopropanolamine.
The blast furnace slag, the fly ash and the desulfurized gypsum adopt solid wastes, and the strength and the performance of the curing agent are weaker than those of cement due to the mixing of the solid wastes. The diethanol monoisopropanolamine is used as a cement excitant to excite the strength of cement in the curing agent so as to improve the strength of the modified soil body; the addition of the diethanol monoisopropanolamine improves the content of the internal hydrated calcium silicate, can give consideration to early-stage and later-stage strength, can improve the strength of the curing agent and improves the water stability; meanwhile, the less blending amount can meet the condition that the performance meets the requirement, and the cost is greatly reduced. The desulfurization gypsum is used as an exciting agent, so that ettringite is increased to play a better role in pore filling, the strength of the modified powder soil is improved, in addition, the ion exchange effect exists, and the thickness of a water film on the surface of soil particles is reduced; the utilization rate of the solid waste materials is brought into play to a greater extent according to the material characteristics, and the effects of reducing the cost and protecting the environment are achieved. In one embodiment of the invention, the preparation method of the yellow soil-based solid waste soil curing agent is provided:
(1) Drying blast furnace slag, fly ash and desulfurized gypsum by adopting an oven, grinding, and sieving respectively;
(2) Weighing blast furnace slag, fly ash, desulfurized gypsum and titanium gypsum according to a proportion, dry-mixing, and adding excitant diethanol monoisopropanolamine and surfactant into water to prepare excitant-surfactant aqueous solution;
when the soil body is solidified, mixing blast furnace slag, fly ash, titanium gypsum, desulfurized gypsum and water, and carrying out smoldering, wherein the smoldering time is operated according to the test procedure of inorganic binder stabilization materials for highway engineering (JTGE 51-2009); and mixing the ordinary Portland cement, the exciting agent and the surfactant aqueous solution within 1h before molding.
In one or more embodiments, the drying temperature is selected to be 40-150 ℃.
In the embodiment of the invention, when the soil body is solidified, the ordinary Portland cement, the excitant and the aqueous solution of the surfactant are mixed within 1h before forming, so that the early hydration of the cement can be prevented from generating strength loss in the later construction process.
In one embodiment of the invention, the application of the yellow soil-flooding region silt solid waste-based green soil curing agent in soil curing is provided.
The invention is further illustrated and described below in connection with specific examples.
Example 1
The soil curing agent for the special soil quality of the yellow flood area comprises the following raw materials in percentage by mass:
33 parts of ordinary Portland cement, 33 parts of blast furnace slag, 34 parts of fly ash, 2 parts of desulfurized gypsum and 5 parts of titanium gypsum; 0.01 part of diethanol monoisopropanolamine and 2 parts of triethanolamine;
drying the solid waste material blast furnace slag, the fly ash, the desulfurized gypsum and the titanium gypsum by adopting an oven, wherein the drying temperature is 40 ℃, and grinding the dried solid waste material blast furnace slag, fly ash and desulfurized gypsum by adopting a planetary ball mill, and sieving the materials respectively;
the method comprises the steps of weighing blast furnace slag, fly ash, titanium gypsum and desulfurized gypsum according to a certain proportion, firstly dry-mixing, adding the rest of exciting agent and surfactant into part of water to prepare aqueous solution of the exciting agent and the surfactant after dilution, mixing dry materials with water to carry out choke plug when soil mass is solidified, and mixing the dry materials with the water for choke plug time according to the test procedure of inorganic binder stabilizing materials for highway engineering (JTGE 51-2009), wherein in order to prevent the cement from being early hydrated and generating strength loss in the later construction process, the cement and the aqueous solution of the exciting agent surfactant after dilution are mixed in 1h before molding.
Example 2
The soil curing agent for the special soil quality of the yellow flood area comprises the following raw materials in percentage by mass:
40 parts of ordinary Portland cement, 40 parts of blast furnace slag, 20 parts of fly ash, 5 parts of desulfurized gypsum and 10 parts of titanium gypsum; 0.08 part of diethanol monoisopropanolamine and 5.8 parts of triisopropanol;
the preparation method comprises the following steps: drying the solid waste material blast furnace slag, the fly ash, the titanium gypsum and the desulfurized gypsum by adopting a drying oven, wherein the drying temperature is 80 ℃, and grinding the dried solid waste material blast furnace slag, the dried titanium gypsum, the dried fly ash and the dried desulfurized gypsum by adopting a planetary ball mill, and sieving the materials respectively;
firstly, dry-mixing blast furnace slag, fly ash, titanium gypsum and desulfurized gypsum according to a certain proportion, adding an excitant diethanol monoisopropanolamine and a surfactant triisopropanol into part of water to prepare an aqueous solution of the excitant and the surfactant diluted, and mixing dry materials with water to carry out choke plug when solidifying soil bodies, wherein the choke plug time is long according to the test procedure of inorganic binder stabilizing materials of highway engineering (JTGE 51-2009); cement and diluted diethanol monoisopropanolamine surfactant aqueous solution are mixed in 1h before molding.
Example 3
The soil curing agent for the special soil quality of the yellow flood area comprises the following raw materials in percentage by mass:
40 parts of ordinary Portland cement, 20 parts of blast furnace slag, 15 parts of desulfurized gypsum, 30 parts of fly ash, 15 parts of titanium gypsum, 0.05 part of diethanol monoisopropanolamine and 5.8 parts of triethanolamine;
the preparation method comprises the following steps: drying the solid waste material blast furnace slag, the fly ash, the titanium gypsum and the desulfurized gypsum by adopting an oven, wherein the drying temperature is 105 ℃, and grinding the dried solid waste material blast furnace slag, the dried fly ash and the desulfurized gypsum by adopting a planetary ball mill, and sieving the materials respectively;
firstly, dry-mixing blast furnace slag, fly ash, titanium gypsum and desulfurized gypsum according to a certain proportion, adding an excitant diethanol monoisopropanolamine and a surfactant triethanolamine into part of water to prepare an excitant, diluting the surfactant into water solution, and mixing the dry-mixed mixture with water to carry out choke plug when the soil body is solidified, wherein the choke plug time is long according to the test procedure of inorganic binder stabilizing materials of highway engineering (JTGE 51-2009); cement and diluted diethanol monoisopropanolamine surfactant aqueous solution are mixed in 1h before molding.
Comparative example 1 [ ]No addition of diethanol monoisopropanolamine
40 parts of ordinary Portland cement, 20 parts of blast furnace slag, 15 parts of desulfurized gypsum, 30 parts of fly ash, 15 parts of titanium gypsum and 5.8 parts of triethanolamine;
the preparation method comprises the following steps: drying the solid waste material blast furnace slag, the fly ash, the titanium gypsum and the desulfurized gypsum by adopting a drying oven, wherein the drying temperature is 40 ℃, and grinding the dried solid waste material blast furnace slag, the dried fly ash, the dried titanium gypsum and the dried desulfurized gypsum by adopting a planetary ball mill, and sieving the materials respectively;
firstly, dry-mixing blast furnace slag, fly ash, titanium gypsum and desulfurized gypsum according to a certain proportion, adding a part of water into a surfactant triethanolamine to prepare an excitant, diluting the surfactant into an aqueous solution, and mixing the dry-mixed mixture with water to carry out smoldering when a soil body is solidified, wherein the smoldering time is in accordance with the test procedure of inorganic binder stabilizing materials of highway engineering (JTGE 51-2009); cement and diluted aqueous surfactant solution were mixed in 1h before forming.
Comparative example 2 [ ]Replacement of excitant diethanol monoisopropanolamine with quicklime or sodium hydroxide
40 parts of ordinary Portland cement, 20 parts of blast furnace slag, 15 parts of desulfurized gypsum, 30 parts of fly ash, 15 parts of titanium gypsum and 5.8 parts of triethanolamine; 5 parts of quicklime and sodium hydroxide;
the preparation method comprises the following steps: drying the solid waste material blast furnace slag, the fly ash, the titanium gypsum and the desulfurized gypsum by adopting a drying oven, wherein the drying temperature is 40 ℃, and grinding the dried solid waste material blast furnace slag, the dried fly ash, the dried titanium gypsum and the dried desulfurized gypsum by adopting a planetary ball mill, and sieving the materials respectively;
firstly, dry-mixing blast furnace slag, fly ash, titanium gypsum and desulfurized gypsum according to a certain proportion, adding quick lime or sodium hydroxide serving as an exciting agent and triethanolamine serving as a surfactant into part of water to prepare an aqueous solution of the exciting agent and the diluted surfactant, and mixing the dry-mixed mixture with water to carry out choke plug when a soil body is solidified, wherein the choke plug time is longer according to the test procedure of inorganic binder stabilizing materials of highway engineering (JTGE 51-2009); cement and quicklime are mixed with diluted sodium hydroxide and surfactant aqueous solution within 1h before molding.
The soil conditioner obtained in example 1-example 3 was subjected to performance test by the following method:
determination of unconfined compressive strength:
the representative soil sample was evenly divided into 3 parts, and the soil solidifying agents of examples 1 to 3 were added to the evenly divided 3-part soil, respectively, with a specific mass ratio of 5% soil solidifying agent to 95% soil sample. A cylindrical sample with the diameter of multiplied by height=50mm multiplied by 50mm is prepared by referring to test procedure of inorganic binder stabilization materials for highway engineering (JTGE 51-2009), under the conditions that the temperature is 20+/-2 ℃ and the relative humidity is more than 95%, the unconfined compressive strength of 7d after the 6d and the 1d are subjected to moisture preservation and the water stabilization coefficient is measured by referring to the specification of CJ/T486 of soil solidification additive, and the ratio of the unconfined compressive strength of 7d after the 6d and the 1d are subjected to moisture preservation and the unconfined compressive strength of 7d under the conditions that the temperature is 20+/-2 ℃ and the relative humidity is more than 95%. The test results are shown in Table 1:
as can be seen from Table 1, the soil stabilizer obtained in the examples of the present invention was higher in unconfined compressive strength and unconfined compressive strength of the test piece after 7d standard curing, and higher in water stability factor, and was stronger than the soil stabilizer obtained in comparative examples 1 and 2. And the dosage of the diethanol monoisopropanolamine is very small, so that the strength of the diethanol monoisopropanolamine can be improved.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The yellow soil-based solid waste soil curing agent is characterized by comprising the following components in parts by weight:
25-40 parts of blast furnace slag; 25-50 parts of fly ash; 2-15 parts of desulfurized gypsum; 5-15 parts of titanium gypsum; 25-40 parts of ordinary Portland cement; the weight parts of the diethanol monoisopropanolamine are eighteen parts per million of the total dry mass of the powder; the weight part of the surfactant is 1-10% of the total dry mass of the powder;
the blast furnace slag is in a state of being dried and ground, the grain diameter of the blast furnace slag is not more than 0.075mm, and the calcium oxide content is 30-50%;
the particle size of the fly ash is not more than 400 meshes, and the main components are silicon dioxide, aluminum oxide, ferric oxide, calcium oxide and sulfur trioxide; wherein the content of calcium oxide is 10-15%;
the desulfurized gypsum is in a state of being dried, crushed and ground, and the particle size of the desulfurized gypsum is not more than 0.075-mm, wherein the content of calcium oxide is 30-50%, and the content of sulfur trioxide is 30-50%.
2. The yellow soil-based solid waste soil hardener of claim 1, wherein the ordinary portland cement is one of model P.O 42.5, P.O 52.5.5, P.O 62.5.62.5.
3. The yellow soil-based solid waste soil hardener of claim 1, wherein the ordinary portland cement is P.O 42.5.42.5.
4. The yellow soil-based solid waste soil solidifying agent for a yellow soil flood zone according to claim 1, wherein the surfactant is triethanolamine or triisopropanolamine.
5. A method for preparing the yellow soil-based solid waste soil solidifying agent in a yellow soil-flood zone according to any one of claims 1 to 4, which is characterized by comprising the following steps:
(1) Drying blast furnace slag, fly ash, desulfurized gypsum and titanium gypsum by adopting an oven, grinding, and sieving respectively;
(2) Weighing blast furnace slag, fly ash, desulfurized gypsum and titanium gypsum according to a proportion, carrying out dry mixing to obtain a dry-mixed mixture, and adding diethanol monoisopropanolamine and a surfactant into water to prepare an excitant-surfactant aqueous solution;
when the soil body is solidified, the dry-mixed mixture is mixed with water and subjected to material smoldering, and the material smoldering time is operated according to JTGE51-2009 of the test procedure of inorganic binder stabilization materials of highway engineering; the ordinary Portland cement, the excitant and the aqueous solution of the surfactant are mixed in 1 and h before molding.
6. The method of claim 5, wherein the drying temperature is selected to be 40-150 ℃.
7. Use of a silt solid waste-based soil solidifying agent according to any one of claims 1-4 in soil solidification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210847861.8A CN115417652B (en) | 2022-07-19 | 2022-07-19 | Yellow-flood-area silt soil solid waste-based soil curing agent and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210847861.8A CN115417652B (en) | 2022-07-19 | 2022-07-19 | Yellow-flood-area silt soil solid waste-based soil curing agent and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115417652A CN115417652A (en) | 2022-12-02 |
| CN115417652B true CN115417652B (en) | 2023-06-09 |
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| CN114656237B (en) * | 2022-03-11 | 2022-10-04 | 山东大学 | Titanium gypsum-based roadbed filler and preparation method and application thereof |
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