CN115745432A - Industrial solid waste based green high-performance road cementing material and application thereof - Google Patents
Industrial solid waste based green high-performance road cementing material and application thereof Download PDFInfo
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Abstract
An industrial solid waste based green high-performance road cementing material and application thereof relate to the field of highway engineering construction, and comprise a reaction base material, an activity exciting agent, an alkaline admixture and water; the reaction base material is steel slag and slag, and the mass ratio of the steel slag to the slag is 1:4-1:1; the active excitant is desulfurized gypsum, and the mass of the active excitant accounts for 10-40% of the total mass of the solids in the cementing material; the alkaline additive is formed by mixing water glass and sodium hydroxide, and the mass of the alkaline additive accounts for 1-4% of the total mass of solids in the cementing material; the mass of water accounts for 0.4-0.55% of the total mass of solids in the cementing material, the invention has the advantages of simple selection of raw materials for preparation, no use of excessive additives, adjustable setting time within a certain range, high early and later strength, good working performance and short maintenance time, and the preparation method is simple and has popularization value in engineering.
Description
Technical Field
The invention relates to the field of highway engineering construction, in particular to an industrial solid waste base green high-performance road cementing material and application thereof.
Background
As is well known, the highway construction and maintenance are fields of high resource occupation, high energy consumption and high carbon emission, and are key fields of energy conservation and emission reduction; 30-40 million tons of materials such as sand stones are consumed each year, wherein 10 million tons of high-quality aggregates are consumed; when 1 ton of hot-mix asphalt mixture is produced, 7-9 kg of combustion oil is consumed, and about 18 kg of carbon dioxide and a large amount of toxic and harmful gases such as asphalt smoke are discharged; the cement solidified soil is used as a base layer or cement is used as a pavement repairing material, not only is the cement itself a raw material with high energy consumption and high pollution in the production process, but also the cement solidified soil has the problems of poor working performance, poor durability, long maintenance time, delayed open traffic and the like, and cannot adapt to complex engineering environments. The common raw materials and construction processes in highway engineering generally have the problems of low engineering cost performance, high highway maintenance cost, insignificant investment economic benefit and environmental benefit and the like. The industrial solid waste base green cementing material solidified soil is used as a base layer or a pavement repairing material, and has the advantages of low cost, energy conservation, carbon reduction, short construction process, less equipment investment, effective improvement of engineering efficiency, solution of solid waste absorption problem, high return on investment and remarkable environmental benefit under the condition that the performance meets the standard requirement. Therefore, there is a need to develop a novel road cementing material to solve the problems in the road base curing and road surface defect repairing engineering and promote the progress of the whole industry in the road engineering construction technology.
Chinese patent CN105228971A discloses a geopolymer mixing design method, which is characterized in that a geopolymer is prepared by mixing a basic material containing an aluminosilicate component, an alkaline activator and water, and the geopolymer mixed material is prepared according to the steps of selecting the basic material and the alkaline activator, pretreating the basic material, analyzing the composition of the basic material and the alkaline activator, calculating the corresponding mole numbers of Si, al, na and H in each unit weight of the material, setting the standard value of a main factor of the geopolymer, and calculating the mixing ratio of the basic material alkaline activator and the water. The invention discloses CN201310488582.8, which discloses a cement stabilized base material, a preparation method, an application method and a road base preparation method, wherein alkaline slag, cement and a base material are utilized, the base material comprises desulfurized gypsum and broken stone, and the road base is prepared according to a conventional preparation process and conditions. Chinese patent CN112645626A, the invention discloses a steel slag-based high-activity admixture and a preparation method thereof, wherein a gelled material is prepared by utilizing hot disintegrating steel slag, fly ash and an excitant, and the mass ratio of the hot disintegrating steel slag, the slag and the fly ash in a main material is 55-65;25-30;10-15, low material production cost and high activity, can provide a feasible technical scheme for resource utilization of the steel slag, and conforms to the green development concept. However, the cement material provided by the above invention has the following disadvantages: the preparation method has the problems of complex raw material preparation, frequent use of the admixture, complex preparation process and long maintenance time, and the prepared cementing material has the problems of unadjustable setting time, narrow use range and the like.
Disclosure of Invention
Based on the defects, the invention provides an industrial solid waste based green high-performance road cementing material.
The invention provides the following technical scheme:
an industrial solid waste based green high-performance road cementing material comprises a reaction base material, an activity exciting agent, an alkaline additive and water; the reaction base material is steel slag and slag, and the mass ratio of the steel slag to the slag is 1:4-1:1; the active excitant is desulfurized gypsum, and the mass of the active excitant accounts for 10% -40% of the total mass of solids in the cementing material; the alkaline additive is formed by mixing water glass and sodium hydroxide, and the mass of the alkaline additive accounts for 1-4% of the total mass of solids in the cementing material; the mass of the water accounts for 0.4-0.55% of the total mass of the solids in the cementing material.
The preparation method of the industrial solid waste based green high-performance road cementing material comprises the following steps:
(1) Preparation of alkaline admixture: sodium hydroxide was added to the water glass to adjust the modulus to 1.0.
(2) Preparation of the gelled material: adding the steel slag, the slag and the active exciting agent into a stirrer according to a ratio, slowly and dry-mixing the dry powder, pouring the prepared alkaline exciting agent and water into the stirrer together according to a corresponding ratio, slowly stirring, then quickly stirring, wherein the total stirring time is not less than 3min, and obtaining the cementing material after stirring.
Preferably, the slag powder is ground until the specific surface area is more than or equal to 500 square meters per kg and the activity of 7 days is more than or equal to 95 percent; the steel slag is ground to a mesh number of more than or equal to 200 meshes, the 28d activity is more than or equal to 95%, and the particle diameter of the steel slag is larger than that of the slag.
Preferably, the desulfurized gypsum is ground to a sieve residue of less than 10% with a 0.2mm pore size.
Preferably, the water glass is industrial grade water glass, and the sodium hydroxide is solid particles.
Preferably, the water glass is sodium silicate water glass.
The invention can be used as a road base curing material, a road base repairing material and a low-grade road base curing material.
Compared with the prior art, the invention has the beneficial effects that:
(1): the material is prepared from the steel slag, the desulfurized gypsum, the alkaline additive and the water in different proportions, and the material can be adjusted in setting time and fluidity by changing the proportions under the condition of meeting the strength requirement, so that the comprehensive performance of the material is improved;
(2): the cementing material provided by the invention has the advantages that the materials in the preparation process are four types of steel slag, desulfurized gypsum and alkaline additive, the material types are few, the preparation method is similar to that of cement, during field construction, only the prepared alkaline additive and water are required to be mixed and added into the mixture of the steel slag, the slag and the desulfurized gypsum, and the operation is simple; the active excitant can improve the reaction activity of the material, reduce the dosage of the alkaline additive and adjust the working performance of the material; meanwhile, the alkaline additive can improve the pH value of the material, and the steel slag and the slag are dissolved and depolymerized in a short time, so that a large amount of ions capable of providing hydration reaction are generated in the slurry, and the early strength of the slurry is ensured; free calcium oxide in the steel slag can reduce the drying shrinkage of the material in later dehydration polycondensation, reduce the drying shrinkage rate and improve the durability of the material;
(3): the road cementing material has the characteristics of stable performance indexes of the road cementing material such as strength, setting time, fluidity, 28d dry shrinkage rate and the like, can achieve the compressive strength of 20MPa in 3d age, has high early strength, can be widely used for projects needing to achieve high strength in the early stage, such as road base construction, pavement repair and the like, can be used as a low-grade pavement curing material in the longer setting time, has low cost, low energy consumption and better durability compared with the traditional materials such as asphalt macadam, cement and the like, and has the advantages of stable performance, high early strength, simple operation and the like compared with the prior art.
Drawings
FIG. 1: the 3d compressive strength is used as an index for analyzing the graph.
FIG. 2: the 3d flexural strength was used as an index to analyze the graph.
FIG. 3: the 28d compressive strength is used as an index for analyzing the graph.
FIG. 4 is a schematic view of: the 28d flexural strength was used as an index to analyze the graph.
FIG. 5 is a schematic view of: the graph was analyzed using fluidity as an index.
FIG. 6: the initial setting time is used as an index to analyze the graph.
FIG. 7 is a schematic view of: the final setting time is used as an index to analyze the graph.
FIG. 8: the graph was analyzed using the 28d dry shrinkage as an index.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
The first embodiment is as follows: an industrial solid waste based green high-performance road cementing material comprises a reaction base material, an activity exciting agent, an alkaline additive and water; the reaction base material is steel slag and slag, and the mass ratio of the steel slag to the slag is 1:4-1:1; the active excitant is desulfurized gypsum, and the mass of the active excitant accounts for 10-40% of the total mass of solids in the cementing material; the alkaline additive is formed by mixing water glass and sodium hydroxide, and the mass of the alkaline additive accounts for 1-4% of the total mass of solids in the cementing material; the mass of the water accounts for 0.4-0.55% of the total mass of the solids in the cementing material.
The preparation method of the industrial solid waste based green high-performance road cementing material comprises the following steps:
(1) Preparation of alkaline admixture: adding sodium hydroxide into water glass to adjust the modulus to 1.0-2.0;
(2) Preparation of the gelled material: adding the steel slag, the slag and the active exciting agent into a stirrer according to a ratio, slowly and dry-mixing the dry powder, pouring the prepared alkaline exciting agent and water into the stirrer together according to a corresponding ratio, slowly stirring, then quickly stirring, wherein the total stirring time is not less than 3min, and obtaining the cementing material after stirring.
Wherein, the slag powder is ground until the specific surface area is more than or equal to 500 square meters per kg and the activity of 7 days is more than or equal to 95 percent; the mesh number of the ground steel slag is more than or equal to 200 meshes, the 28d activity is more than or equal to 95%, and the particle diameter of the steel slag is more than that of the slag.
Wherein the desulfurized gypsum is ground to a particle size of 0.2mm, and the screen allowance is less than 10%.
Wherein the water glass is industrial water glass, and the water glass is sodium silicate water glass; the sodium hydroxide is solid particles.
In this embodiment, the steel slag is used as a reaction substrate, contains active minerals similar to cement, including tricalcium silicate and dicalcium silicate, and has a certain gelling activity, but because the active components of the steel slag are oxidized by high-temperature smelting, the steel slag has a certain inertia and can be slowly decomposed only in an environment with strong alkalinity. The steel slag occupies a small proportion in the reaction base material, so that on one hand, the material has good working performance by utilizing the characteristic of poor water absorption of the steel slag, and on the other hand, the steel slag can be utilized to continuously provide CaO, mgO and other components required by the reaction, thereby ensuring the continuous development of the strength of the material.
The slag is rich in CaO, mgO and SiO 2 And the like, wherein the Ca-O, mg-O bond energy is much lower than that of Si-O, so that the slag has certain activity. Meanwhile, the main mineral compositions of the slag and the portland cement are analyzed from the main chemical components of the slag, although the contents are different, the component types are basically the same, and the slag mainly comprises CaO and SiO 2 、Al 2 O 3 And the existence of the active substances enables the slag to have certain activity, the early strength of material hydration mainly comes from the hydration of the slag, so the slag accounts for a large proportion in a reaction base material, and the experimental result shows that the mass ratio of the steel slag to the slag is 1: 3. 1:2, the material has higher strength.
The desulfurized gypsum is rich in dihydrate gypsum and semi-hydrate gypsum, has an active excitation effect when being mixed with steel slag and slag, and is commonly used as a sulfate exciting agent, experimental researches show that the mixing amount of the desulfurized gypsum is less than 10 percent, the early strength of the material is low, the material cannot play an effective excitation effect, a large amount of alkaline additives are needed to enable the material to reach the PO32.5 cement level, when the mixing amount of the desulfurized gypsum is more than 40 percent, the material strength can be guaranteed, but the working performance of the material is greatly reduced, the fluidity and the setting time are short, and the engineering requirements are not met.
The mixed solution of water glass and sodium hydroxide is used as an alkaline additive to provide an alkaline environment for the material, accelerate the depolymerization process of the material and enable the material to have higher early strength; the reaction rate and the strength development of the material are directly influenced by the size of the water-gel ratio, and a small amount of small pores are generated after the material is hardened while the water-gel ratio of the small water-gel ratio meets the water required by the hydration reaction of the material, so that the structure is more compact and the strength is higher. When the water-gel ratio is large, the material is in full contact with water, the reaction rate is high, but a large amount of bubbles are generated in the material, the material is influenced to be condensed into a mass, the strength is not increased favorably, and experimental research shows that the material is suitable under the condition of the water-gel ratio of 0.4-0.55.
In this embodiment, the material proportioning range is too large, a design orthogonal experiment is selected to optimize the material proportioning, and the experimental result is analyzed. In order to comprehensively consider the mechanical strength (including 3d and 28d compressive and flexural strength), the working performance (including fluidity, initial setting time and final setting time) and the 28d shrinkage ratio of the material, the mixing proportion meeting the construction requirement is selected by using an efficiency coefficient method.
As shown in FIG. 1, the experiment shows that the average strength is the highest when the steel slag/slag is level 2 (mass ratio is 1:3), the mixing amount of the desulfurized gypsum is level 4 (the mass of the desulfurized gypsum accounts for 40% of the total mass of the solids in the gelled material), the modulus of the water glass is level 1 (1.0), the alkali equivalent is level 3 (the mass of the alkaline admixture accounts for 3% of the total mass of the solids in the gelled material), and the water-cement ratio is level 1 (the mass of the water accounts for 0.4% of the total mass of the solids in the gelled material) by taking the 3d compressive strength as an index.
As shown in FIG. 2, the experiment shows that the strength average value is highest when the steel slag/slag is level 2 (mass ratio is 1:3), the mixing amount of the desulfurized gypsum is level 4 (the mass of the desulfurized gypsum accounts for 40% of the total mass of the solids in the gelled material), the modulus of the water glass is level 1 (1.0), the alkali equivalent is level 3 (the mass of the alkaline admixture accounts for 3% of the total mass of the solids in the gelled material), and the water-cement ratio is level 1 (0.4) by taking the 3d flexural strength as an index.
As shown in FIG. 3, with the 28d compressive strength as an index, the experiment shows that the average strength is the highest when the steel slag/slag is level 2 (mass ratio of 1:3), the mixing amount of the desulfurized gypsum is level 4 (the mass of the desulfurized gypsum accounts for 40% of the total mass of the solids in the cementitious material), the modulus of water glass is level 1 (1.0), the alkali equivalent is level 3 (the mass of the alkaline admixture accounts for 3% of the total mass of the solids in the cementitious material), and the water-to-gel ratio is level 1 (the mass of water accounts for 0.4% of the total mass of the solids in the cementitious material).
As shown in FIG. 4, the experiment shows that the average strength is the highest when the steel slag/slag is level 2 (mass ratio 1:3), the mixing amount of the desulfurized gypsum is level 4 (the mass of the desulfurized gypsum accounts for 40% of the total mass of the solids in the cementitious material), the modulus of the water glass is level 1 (1.0), the alkali equivalent is level 3 (the mass of the alkaline admixture accounts for 3% of the total mass of the solids in the cementitious material), and the water-cement ratio is level 1 (the mass of the water accounts for 0.4% of the total mass of the solids in the cementitious material) by taking the 28d flexural strength as an index.
As shown in FIG. 5, experiments show that the increase of the mixing amount of the desulfurized gypsum can affect the working performance of the material and reduce the fluidity of the material by taking the fluidity as an index, and the construction requirement can be met only when the fluidity of the clean slurry is more than 180 mm.
As shown in FIG. 6, the initial setting time is an index, the setting time is significantly different under the condition of different material mixing ratios, and when the initial setting time is more than 90min, the influence on the construction quality due to the premature loss of plasticity of the material can be avoided, and the construction requirements of the pavement engineering can be met.
As shown in FIG. 7, the final setting time is taken as an index, the difference of the setting time is obvious under the condition of different material mixing ratios, and when the final setting time is more than 90min and less than 490min, the condition that the construction progress is influenced by overlong setting and hardening time can be avoided, and the construction requirement of the pavement engineering is met.
As shown in FIG. 8, the 28d shrinkage is used as an index, the 28d shrinkage has a remarkable difference under different material mixing ratios, the net pulp shrinkage does not have a corresponding standard, and the smaller the 28d shrinkage, the stronger the drying shrinkage resistance of the material. When the shrinkage rate is smaller, the damage to the pavement caused by overlarge drying cracks can be avoided, and the construction requirement of pavement engineering is met.
The 8 indexes are considered in an orthogonal design, table 1 gives an efficacy coefficient to each assessment index, the evaluation index is assigned to be 1 when the effect is the best, and the other assessment indexes are assigned to be the ratio of the index to the best index value. The 8 th-order root of the efficacy coefficients of the 8 assessment indexes is the total efficacy coefficient, and the size of the total efficacy coefficient is used for representing the total quality condition of the 8 indexes.
Example two: the preparation method of the industrial solid waste based green high-performance road cementing material comprises the following steps of: 2; the active excitant accounts for 10 percent of the total mass; the modulus of the alkaline additive is 1.0; the mass of the alkaline additive accounts for 3 percent of the total mass of solids in the cementing material; the water-gel ratio is 0.4, and the gel material is prepared.
The preparation method of the industrial solid waste based green high-performance road cementing material comprises the following steps:
(1) According to the mass ratio of 1:2, preparing a reaction base material by mixing steel slag and slag; weighing desulfurized gypsum according to the proportion accounting for 10 percent of the total mass of solids in the cementing material, and preparing water glass and sodium hydroxide into an alkaline additive with a modulus of 1.0 according to the proportion, wherein the mass of the alkaline additive accounts for 3 percent of the total mass of solids in the cementing material; the mass of water accounts for 40% of the total mass of solids in the cementitious material;
(2) Pouring the steel slag, the slag and the desulfurized gypsum into a cement mixer according to the mixing proportion, slowly stirring for 30s to uniformly mix the solid material, slowly adding the alkaline additive and the water during stirring, slowly stirring for 30s and then quickly stirring for 120s, and mechanically stirring and uniformly mixing, wherein the total stirring time is not less than 3min.
(3) Using a part of the stirred slurry to test the fluidity and the setting time of the slurry; the other part of the slurry was poured into a prepared 40 x 160mm triple mold and placed into a curing box for curing, and the compressive and flexural strengths of 3d, 7d, and 28d, respectively, were measured.
The initial setting time of the grouting material is 117min, the final setting time is 173min, the fluidity is 224mm, the 3d compressive strength is 21.56MPa, the 7d compressive strength is 28.36MPa, and the 28d compressive strength is 36MPa; the 3d flexural strength of the cementing material is 4.86MPa, the 7d flexural strength of the cementing material is 6.05MPa, and the 28d flexural strength of the cementing material is 6.12MPa, the early strength of the cementing material is high, and the later compressive flexural strength of the cementing material exceeds the PO32.5 level, so that the cementing material can be used as a road base curing material.
Example three: the preparation method of the industrial solid waste based green high-performance road cementing material comprises the following steps of: 3; the active excitant accounts for 40% of the total mass; the modulus of the alkaline additive is 1.0; the mass of the alkaline additive accounts for 2 percent of the total mass of solids in the cementing material; (ii) a The cement is prepared according to the proportion of 0.45 of water-cement ratio.
The preparation method of the industrial solid waste based green high-performance road cementing material comprises the following steps:
(1) According to the mass ratio of 1:3, preparing a reaction base material by mixing the steel slag and the slag; weighing desulfurized gypsum according to the proportion accounting for 40 percent of the total mass of solids in the cementing material, and preparing water glass and sodium hydroxide into an alkaline additive with a modulus of 1.0 according to the proportion, wherein the mass of the alkaline additive accounts for 2 percent of the total mass of solids in the cementing material; the mass of water accounts for 45% of the total mass of solids in the cementitious material;
(2) Pouring the steel slag, the slag and the desulfurized gypsum into a cement mixer according to the mixing proportion, slowly stirring for 30s to uniformly mix the solid material, slowly adding the alkaline additive and the water during stirring, slowly stirring for 30s and then quickly stirring for 120s, and mechanically stirring and uniformly mixing, wherein the total stirring time is not less than 3min.
(3) Using a part of the stirred slurry to test the fluidity and the setting time of the slurry; the other part of the slurry was poured into a prepared 40 x 160mm triple mold and placed into a curing box for curing, and the compressive and flexural strengths of 3d, 7d, and 28d, respectively, were measured.
The initial setting time of the gelled material is 46min, the final setting time is 235min, the fluidity is 320mm, the 3d compressive strength is 23.44MPa, the 7d compressive strength is 34.7MPa, and the 28d compressive strength is 42.74MPa; the 3d flexural strength is 4.54MPa, the 7d flexural strength is 5.81MPa, the 28d flexural strength is 7.21MPa, the cementing material has the characteristics of high setting and hardening speed, high fluidity and the like, the later-stage compressive and flexural strength exceeds the PO42.5 level, and the cementing material can be used as a road surface layer repairing material.
Example four: the preparation method of the industrial solid waste based green high-performance road cementing material comprises the following steps of: 4; the active excitant accounts for 30 percent of the total mass; the modulus of the alkaline additive is 1.0; the mass of the alkaline additive accounts for 4% of the total mass of solids in the cementing material; the cement is prepared according to the proportion of 0.55 of water-cement ratio.
The preparation method of the industrial solid waste based green high-performance road cementing material comprises the following steps:
(1) According to the mass ratio of 1:4, preparing a reaction base material by mixing steel slag and slag; weighing desulfurized gypsum according to the proportion accounting for 30 percent of the total mass of solids in the cementing material, and preparing water glass and sodium hydroxide into an alkaline additive with the modulus of 1.0 according to the proportion, wherein the mass of the alkaline additive accounts for 4 percent of the total mass of solids in the cementing material; the mass of water accounts for 55% of the total mass of solids in the cementitious material;
(2) Pouring the steel slag, the slag and the desulfurized gypsum into a cement mixer according to the mixing proportion, slowly stirring for 30s to uniformly mix the solid material, slowly adding the alkaline additive and the water during stirring, slowly stirring for 30s and then quickly stirring for 120s, and mechanically stirring and uniformly mixing, wherein the total stirring time is not less than 3min.
(3) Using a part of the stirred slurry to test the fluidity and the setting time of the slurry; the other part of the slurry was poured into a prepared 40 x 160mm triple mold and placed into a curing box for curing, and the compressive and flexural strengths of 3d, 7d, and 28d, respectively, were measured.
The initial setting time of the cementing material is 117min, the final setting time is 130min, the fluidity is 205mm, the 3d compressive strength is 13.99MPa, the 7d compressive strength is 24.63MPa, and the 28d compressive strength is 27.13MPa; the 3d flexural strength is 1.79MPa, the 7d flexural strength is 3.89MPa, the 28d flexural strength is 5.04MPa, the cementitious material has the characteristics of slow setting and hardening speed, high fluidity and the like, the later-stage compressive and flexural strength is far higher than the PO22.5 level, and the cementitious material can be used as a curing material for a low-grade road base.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention by equivalent replacement or change according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (9)
1. An industrial solid waste based green high-performance road cementing material is characterized in that,
comprises a reaction substrate, an activity exciting agent, an alkaline additive and water;
the reaction base material is steel slag and slag, and the mass ratio of the steel slag to the slag is 1:4-1:1;
the active excitant is desulfurized gypsum, and the mass of the active excitant accounts for 10-40% of the total mass of solids in the cementing material;
the alkaline additive is formed by mixing water glass and sodium hydroxide, and the mass of the alkaline additive accounts for 1-4% of the total mass of solids in the cementing material;
the mass of the water accounts for 0.4-0.55% of the total mass of the solids in the cementing material.
2. The method for preparing the industrial solid waste based green high-performance road cementing material as claimed in claim 1, which is characterized by comprising the following steps:
(1) Preparation of alkaline admixture: adding sodium hydroxide into water glass to adjust the modulus to 1.0-2.0;
(2) Preparation of the gelled material: adding the steel slag, the slag and the active exciting agent into a stirrer according to a ratio, slowly and dry-mixing the dry powder, pouring the prepared alkaline exciting agent and water into the stirrer together according to a corresponding ratio, slowly stirring, then quickly stirring, wherein the total stirring time is not less than 3min, and obtaining the cementing material after stirring.
3. The method for preparing the industrial solid waste based green high-performance road cementing material according to claim 2, wherein the slag powder is ground until the specific surface area is more than or equal to 500 square meters per kg; the mesh number of the ground steel slag is more than or equal to 200 meshes, and the particle diameter of the steel slag is more than that of the slag.
4. The method for preparing the industrial solid waste based green high-performance road cementing material according to claim 2, wherein the desulfurized gypsum is ground to a size of 0.2mm, and the screen allowance of the screen is less than 10%.
5. The method for preparing the industrial solid waste based green high-performance road cementing material according to claim 2, wherein the water glass is industrial grade water glass, and the sodium hydroxide is solid particles.
6. The method for preparing the industrial solid waste based green high-performance road cementing material according to claim 5, wherein the water glass is sodium silicate water glass.
7. The use of the industrial solid waste-based green high-performance road cement as claimed in claim 1, characterized by the use in curing of road base course.
8. The use of the industrial solid waste-based green high-performance road cement as claimed in claim 1, characterized by its use in road base repair.
9. The use of the industrial solid waste green high performance road cement of claim 1 in curing low grade road substrates.
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| US20200299194A1 (en) * | 2019-03-21 | 2020-09-24 | Tangshan Polar Bear Building Materials Co., Ltd. | Granulated Blast-furnace Slag Activator, Its Manufacturing Method Thereof, and Manufacturing Method of Cement |
| CN115321848A (en) * | 2022-08-05 | 2022-11-11 | 段崇国 | Full-solid waste-based low-carbon green ecological cementing material and manufacturing method thereof |
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| US20200299194A1 (en) * | 2019-03-21 | 2020-09-24 | Tangshan Polar Bear Building Materials Co., Ltd. | Granulated Blast-furnace Slag Activator, Its Manufacturing Method Thereof, and Manufacturing Method of Cement |
| CN115321848A (en) * | 2022-08-05 | 2022-11-11 | 段崇国 | Full-solid waste-based low-carbon green ecological cementing material and manufacturing method thereof |
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| CN117550867A (en) * | 2024-01-10 | 2024-02-13 | 石家庄铁道大学 | High-strength high-toughness steel slag-based cementing material and preparation method thereof |
| CN117550867B (en) * | 2024-01-10 | 2024-03-22 | 石家庄铁道大学 | High-strength high-toughness steel slag-based cementing material and preparation method thereof |
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