CN114133196B - Cement grouting material and preparation method thereof - Google Patents
Cement grouting material and preparation method thereof Download PDFInfo
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- CN114133196B CN114133196B CN202111388800.1A CN202111388800A CN114133196B CN 114133196 B CN114133196 B CN 114133196B CN 202111388800 A CN202111388800 A CN 202111388800A CN 114133196 B CN114133196 B CN 114133196B
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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
- C04B28/143—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being phosphogypsum
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/144—Slags from the production of specific metals other than iron or of specific alloys, e.g. ferrochrome slags
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
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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
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
-
- 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
-
- 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)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a cement grouting material and a preparation method thereof, wherein the cement grouting material comprises 300-384 parts of cement, 65-120 parts of modified aluminum ash, 45-60 parts of modified phosphogypsum, 430-480 parts of sand and 2-7 parts of powder carboxylic acid; the modified aluminum ash mainly comprises aluminum sulfate, magnesium sulfate, silicon oxide, aluminum oxide and simple substance aluminum; the modified phosphogypsum mainly comprises tricalcium aluminate, alumina, calcium oxide, tricalcium silicate, tetracalcium aluminoferrite and calcium sulfate. The preparation method comprises the steps of stirring sand, cement, modified aluminum ash, modified phosphogypsum and powder carboxylic acid uniformly in sequence. The invention utilizes the modified aluminum ash and the modified phosphogypsum as raw materials, and the prepared cement grouting material has good fluidity and early strength characteristic, ensures that the strength is not influenced, and has controllable micro-expansion performance and setting time. The invention reduces the cost, realizes the harmless and resource treatment of hazardous wastes, and can promote the continuous development of the cement grouting material industry.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a cement grouting material and a preparation method thereof.
Background
The cement grouting material is a dry mixture which is prepared by taking cement as a cementing material, and adding fine aggregate, various additives and other materials. After being added with water and stirred, the material has good fluidity, early strength, high strength, micro-expansion and other properties, is an ideal material in the fields of anchoring of foundation bolts and bases, secondary grouting of equipment foundations, collapse grouting of various foundation projects, various rush-repair projects and the like, is widely applied to the field of buildings, and has great market potential.
The cement grouting material generally comprises 45-60% of cementing material, 35-45% of sand and 5-10% of functional small material, wherein the cost of the cementing material directly determines the cost of the cement grouting material and is also a main reason for restricting the development of the cement grouting material. The common cementing materials of the cement grouting material comprise cement, silica fume, fly ash, stone powder and the like, wherein the cement guarantees the strength of the grouting material, and active admixtures such as the silica fume, the fly ash, the stone powder and the like only play a part of the roles of activity and filling. The cement is used as the most basic raw material for economic construction, is also a high-energy-consumption and high-emission industry, and is an important way for realizing sustainable development of cement grouting materials by responding to the situation that the price of the cement is continuously increased and the price of the cement is difficult to be obtained, promoting energy conservation and emission reduction, and accelerating harmless treatment and comprehensive utilization of wastes.
The secondary aluminum ash is one of the main byproducts in the industrial production of secondary aluminum, has very uneven components, mainly comprises aluminum oxide and simple substance aluminum, and the other components comprise magnesium, calcium, sodium and potassium metal chlorides and iron, silicon and magnesium oxides. According to statistics, every 1t of aluminum is produced, 25-30 kg of secondary aluminum ash is produced. At present, the secondary aluminum ash treatment is mainly performed by accumulation, the accumulation of the aluminum ash is not only a great waste of aluminum resources, but also heavy metal salts in the aluminum ash and the like can cause serious pollution to surrounding atmosphere, soil and underground water. Therefore, the efficient recycling of aluminum resources can be realized by further utilizing the aluminum and the compounds thereof in the secondary aluminum ash, and the method has important significance for the sustainable development of the society. Phosphogypsum is a solid waste of phosphate fertilizer industry, and the main component of phosphogypsum is CaSO 4 ·2H 2 O, the mass fraction of which exceeds 90 percent, is an important renewable gypsum resource. In recent years, with the rapid development of the high-efficiency compound fertilizer industry, the annual emission amount of the phosphogypsum in China exceeds 5000 ten thousand tons. The phosphogypsum contains more harmful substances such as phosphorus, fluorine and the like, and can cause environmental pollution if being randomly discharged. The dam is built and stockpiled, which not only occupies a large area, has large investment and high slag piling cost, but also has potential safety hazard.
Therefore, the secondary aluminum ash and the phosphogypsum are recycled as wastes, and the method has good economic and social benefits.
At present, the problems of low early strength or high production and manufacturing cost of the grouting material and the like generally exist in the cement grouting material due to the product formula and the like, and the continuous development of the cement grouting material industry is restricted to a certain extent.
Disclosure of Invention
The invention aims to solve the technical problems of high cost and low early strength of the existing cement grouting material, simultaneously exerts the advantages of aluminum ash and phosphogypsum and realizes harmless and resource treatment of hazardous wastes.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a cement grouting material mainly comprises 300-384 parts of cement, 65-120 parts of modified aluminum ash, 45-60 parts of modified phosphogypsum, 430-480 parts of sand and 2-7 parts of powder carboxylic acid; the modified aluminum ash comprises aluminum sulfate, magnesium sulfate, silicon oxide, aluminum oxide and simple substance aluminum, wherein the content of the aluminum sulfate is more than or equal to 46 percent, the content of the magnesium sulfate is 14 to 16.5 percent, the content of the silicon oxide is more than or equal to 12 percent, the content of the aluminum oxide is less than or equal to 2.5 percent, and the content of the simple substance aluminum is 1.5 to 2.8 percent; the modified phosphogypsum comprises tricalcium aluminate, alumina, calcium oxide, tricalcium silicate, tetracalcium aluminoferrite and calcium sulfate, wherein the content of tricalcium aluminate is more than or equal to 32%, the content of alumina is less than or equal to 12%, the content of calcium oxide is less than or equal to 8%, the content of tricalcium silicate is more than or equal to 7.8%, the content of tetracalcium aluminoferrite is 2.8-3.6%, and the content of calcium sulfate is 1.2-3.6%.
Preferably, the sand is washed sand, river sand and machine-made sand meeting the requirement of the two-zone particle composition, and the mud content (mass%) is less than or equal to 1.0%.
Preferably, the powder carboxylic acid is a powder polycarboxylic acid water reducing agent, the solid content is more than or equal to 98 percent, and the water reducing rate is more than or equal to 25 percent.
The preparation method of the cement grouting material comprises the following steps:
weighing the components according to the formula proportion, putting the sand, the cement, the modified aluminum ash, the modified phosphogypsum and the powder carboxylic acid into a powder material stirrer in sequence, and stirring uniformly.
Preferably, the cement is one or more of 42.5-grade ordinary portland cement (p.o 42.5) or 52.5-grade ordinary portland cement (p.o 52.5).
The aluminum ash is the surplus aluminum ash after secondary aluminum ash treatment, wherein the content of a simple substance Al is 33.8 percent, and the content of aluminum oxide Al is 2 O 3 17.4% of Si, 7.1% of MgAl 2 O 4 The content of the other components is 15.3 percent, and the other components are magnesium, calcium, sodium and potassium metal chlorides and iron, silicon and magnesium oxides.
The phosphogypsum is waste residue of a certain fertilizer plant, wherein CaSO 4 91.2% of SiO 2 The content is 7.84%.
Preferably, the preparation method of the modified aluminum ash comprises the following steps:
s1, putting aluminum ash and water into a reaction kettle, mixing and stirring to obtain an aluminum ash mixed solution with the solid content of 75%, then dropwise adding concentrated sulfuric acid with the mass of 10% of the aluminum ash into the mixed solution, and continuing to react until the temperature is reduced to room temperature within 1 hour to obtain a coarse material.
S2, taking out the coarse material, placing the coarse material in an oven with the temperature of 100 +/-0.2 ℃ for baking for 1-2 h, cooling, placing the coarse material in a ball mill for ball milling until the specific surface area is 500-600m 2 And/kg of powder, namely the modified aluminum ash.
Preferably, the preparation method of the modified phosphogypsum comprises the following steps:
s1, mixing and stirring aluminum ash and phosphogypsum uniformly according to a mass ratio of 2;
s2, adding phosphogypsum (4-12% of the dosage of the phosphogypsum in the S1) into the coarse material, uniformly mixing, and then placing the mixture into a ball mill for ball milling until the specific surface area is 500-600m 2 And/kg of powder, namely the modified phosphogypsum.
The mechanism of the invention is as follows:
the invention utilizes the modified aluminum ash and the modified phosphogypsum to reduce the cost of the cement grouting material. Most of the aluminum ash is converted into aluminum sulfate through the treatment of water and concentrated sulfuric acid, and the aluminum sulfate is a main component of the early strength agent and can accelerate the hydration process of cement; the alumina and the silicon oxide which are not fully reacted can also continuously perform secondary hydration reaction with the cement hydration product calcium hydroxide, so that the strength of the grouting material is improved; the reaction of the aluminum simple substance which is not fully reacted and the alkali environment realizes the micro-expansion of the cement grouting material; the rest of the unreacted parts can be used as fillers by utilizing the superfine specific surface area of the unreacted parts, so that the hydration heat of the cement is reduced, and the grain composition and the compactness of the cementing material are improved. The ardealite is modified by using aluminum ash, and a large amount of residual aluminum of the aluminum ash and calcium salts in the ardealite are calcined at high temperature to form high-activity substances such as tricalcium aluminate, dicalcium silicate, aluminum oxide, calcium oxide and the like, so that the active ingredients of a cementing material are improved, and the residual calcium sulfate can control the setting time of the grouting material.
The invention has the beneficial effects that:
(1) The invention utilizes the modified aluminum ash and the modified phosphogypsum as the raw materials of the cement grouting material, and the prepared cement grouting material has good fluidity and early strength characteristic, and simultaneously ensures that the strength is not influenced. Has controllable micro-expansion performance and coagulation time.
(2) The invention reduces the cost of the cement grouting material by utilizing the modified aluminum ash and the modified phosphogypsum, and has higher cost performance and market competitiveness. The modified aluminum ash and the modified phosphogypsum can simultaneously replace part of the cement dosage and completely replace the use of an active admixture, an expanding agent and a retarder.
(3) The invention fully utilizes the aluminum ash and the phosphogypsum for modification, realizes the harmless and recycling treatment of hazardous wastes, and promotes the sustainable development of the cement grouting material industry.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to specific examples, but the present invention is not limited to the following technical solutions.
Example 1
Putting 500g of aluminum ash and 167g of water into a reaction kettle, mixing and stirring to obtain a 75% solid aluminum ash mixed solution, then dropwise adding 50g of concentrated sulfuric acid into the mixed solution, and continuously reacting within 1 hour until the temperature is reduced to room temperature; taking out, oven drying at 100 + -0.2 deg.C for 2 hr, cooling, ball milling in a ball mill to obtain powder with surface area of 589.4m 2 The powder material of/kg, modified aluminum ash is obtained. Mixing 400g of aluminum ash and 200g of phosphogypsum, uniformly stirring, placing the mixture in a high-temperature resistance furnace at 1100 ℃ for reacting for 1 hour, and taking out the mixture after cooling; continuously feeding into the coarse materialAdding 8g of phosphogypsum, uniformly mixing, placing in a ball mill, ball-milling to obtain powder, and detecting that the surface area of the powder is 580.4m 3 And/kg, thus obtaining the modified phosphogypsum. Weighing the components according to the formula proportion, putting 430 river sand, 300 parts of P.O52.5 cement, 65 parts of modified aluminum ash, 60 parts of modified phosphogypsum and 2 parts of powder carboxylic acid into a powder material stirrer in sequence, and stirring uniformly.
Example 2
Putting 500g of aluminum ash and 167g of water into a reaction kettle, mixing and stirring to obtain a 75% solid aluminum ash mixed solution, then dropwise adding 50g of concentrated sulfuric acid into the mixed solution, and continuing to react until the temperature is reduced to room temperature after dropwise adding is finished within 1 hour; taking out, oven drying at 100 + -0.2 deg.C for 1 hr, cooling, ball milling in a ball mill to obtain powder with surface area of 522.6m 2 The powder material is/kg, and modified aluminum ash is obtained. Mixing 400g of aluminum ash and 200g of phosphogypsum, uniformly stirring, placing the mixture in a high-temperature resistance furnace at 1100 ℃ for reacting for 1 hour, and taking out the mixture after cooling; continuously adding 24g of phosphogypsum into the coarse material, uniformly mixing, placing the mixture into a ball mill, and ball-milling to obtain powder, wherein the surface area of the powder is 562.9m by detection 3 And/kg, thus obtaining the modified phosphogypsum. Weighing the components according to the formula proportion, putting 480 parts of washed sand, 384 parts of P.O 42.5 cement, 90 parts of modified aluminum ash, 50 parts of modified phosphogypsum and 5 parts of powder carboxylic acid into a powder material stirrer in sequence, and stirring uniformly.
Example 3
Putting 500g of aluminum ash and 167g of water into a reaction kettle, mixing and stirring to obtain a 75% solid aluminum ash mixed solution, then dropwise adding 50g of concentrated sulfuric acid into the mixed solution, and continuing to react until the temperature is reduced to room temperature after dropwise adding is finished within 1 hour; taking out, placing in an oven at 100 + -0.2 deg.C, baking for 1h, cooling, placing in a ball mill, and ball-milling to obtain powder material with surface area 522.6m 2 The powder material of/kg, modified aluminum ash is obtained. Mixing 400g of aluminum ash and 200g of phosphogypsum, uniformly stirring, placing the mixture in a high-temperature resistance furnace at 1100 ℃ for reacting for 1 hour, and taking out the mixture after cooling; adding 16g of phosphogypsum into the coarse material, mixing uniformly, placing the mixture into a ball mill, and ball-milling to obtain powder, wherein the surface area is 542.7m by detection 3 And/kg, thus obtaining the modified phosphogypsum. Weighing the components according to the proportion of the formula, and sequentially mixing 480 parts of machine-made sand and 180 parts of P.O 42.5And putting the cement, 160 parts of P.O52.5 cement, 120 parts of modified aluminum ash, 45 parts of modified phosphogypsum and 7 parts of powder carboxylic acid into a powder material stirrer, and uniformly stirring.
Example 4
Weighing the components according to the formula proportion on the basis of example 1, and sequentially putting 240 parts of river sand, 210 parts of machine-made sand, 384 parts of P.O 42.5 cement, 70 parts of modified aluminum ash, 45 parts of modified phosphogypsum and 4 parts of powdery carboxylic acid into a powdery material stirrer to be uniformly stirred.
Comparative example 1
Weighing the components according to the formula ratio, and putting 240 parts of river sand, 210 parts of machine-made sand, 384 parts of P.O 42.5 cement, 115 parts of fly ash and 4 parts of powder carboxylic acid into a powder material stirrer in sequence and stirring uniformly. (wherein the specific surface area of the fly ash is 533.9m 2 /kg)
The fluidity test method of the cement grouting material is carried out according to GB/T2419-2016 cement mortar fluidity test method. The strength test method is carried out according to GB/T17671-1999 cement mortar strength test method, and the pouring forming is adopted to replace the vibration forming. The setting time is determined by adopting a penetration resistance method according to the specification of GBT 50080-2016 (general concrete mixture Performance test method).
Table 1 shows the main properties of the grouts of examples 1-4 and comparative example 1, and Table 2 shows the vertical expansion rates of the grouts of examples 1-4 and comparative example 1.
TABLE 1 principal Properties of the grouting materials
TABLE 2 vertical expansion ratio of grouting material
As can be seen from tables 1 and 2, the cement grouting material of the invention has good fluidity, early strength, later strength and micro-expansion performance. Compared with the comparative example 1, the introduction of the modified aluminum ash and the modified phosphogypsum promotes the hydration of cement, improves the early strength of the grouting material, and does not influence the development of the later strength. The micro-expansion performance of the aluminum ash meets the requirement, and the stability and the safety of connection are ensured.
It is to be noted that ". Gtoreq.or" > "of the components mentioned in the present invention does not include 100%, and likewise, 0 is not included in the". Gtoreq.or "<".
Claims (7)
1. The cement grouting material is characterized by mainly comprising 300-384 parts of cement, 65-120 parts of modified aluminum ash, 45-60 parts of modified phosphogypsum, 430-480 parts of sand and 2-7 parts of powder carboxylic acid; the modified aluminum ash comprises aluminum sulfate, magnesium sulfate, silicon oxide, aluminum oxide and simple substance aluminum, wherein the content of the aluminum sulfate is more than or equal to 46 percent, the content of the magnesium sulfate is 14 to 16.5 percent, the content of the silicon oxide is more than or equal to 12 percent, the content of the aluminum oxide is less than or equal to 2.5 percent, and the content of the simple substance aluminum is 1.5 to 2.8 percent; the modified phosphogypsum comprises tricalcium aluminate, alumina, calcium oxide, tricalcium silicate, tetracalcium aluminoferrite and calcium sulfate, wherein the content of tricalcium aluminate is more than or equal to 32 percent, the content of alumina is less than or equal to 12 percent, the content of calcium oxide is less than or equal to 8 percent, the content of tricalcium silicate is more than or equal to 7.8 percent, the content of tetracalcium aluminoferrite is 2.8-3.6 percent, and the content of calcium sulfate is 1.2-3.6 percent;
the modified phosphogypsum is prepared by the following method:
a. mixing and stirring the aluminum ash and the phosphogypsum uniformly according to the mass ratio of 2;
b. adding phosphogypsum into the coarse material again, mixing uniformly, and then placing the mixture into a ball mill for ball milling until the specific surface area is 500-600m 2 The powder material of/kg, namely the modified phosphogypsum is obtained; the amount of the added phosphogypsum is 4 to 12 percent of the amount of the phosphogypsum in the step a;
the modified aluminum ash is prepared by the following method: A. putting aluminum ash and water into a reaction kettle, mixing and stirring to obtain an aluminum ash mixed solution with the solid content of 75%, then dropwise adding concentrated sulfuric acid with the mass of 10% of the aluminum ash into the mixed solution, and continuing to react until the temperature is reduced to room temperature within 1h to obtain a coarse material;
B. taking outPlacing the coarse material in an oven at the temperature of 100 +/-0.2 ℃ for drying for 1-2 h, cooling, placing in a ball mill for ball milling until the specific surface area is 500-600m 2 And/kg of powder, namely the modified aluminum ash.
2. The cement grouting material as claimed in claim 1, wherein the sand is washed sand, river sand or machine-made sand meeting the requirement of the two-zone particle composition, and the mass percent of the mud content is less than or equal to 1.0%.
3. The cement grout material as claimed in claim 1, wherein said powdery carboxylic acid is powdery polycarboxylic acid water reducing agent with solid content not less than 98% and water reducing rate not less than 25%.
4. The cement grout material as claimed in any one of claims 1 to 3, wherein said cement is one or more of Portland cement grade 42.5 or Portland cement grade 52.5.
5. The cement grout material as claimed in any one of claims 1 to 3, wherein the aluminum ash is the surplus aluminum ash after the secondary aluminum ash treatment, wherein the content of simple substance Al is 33.8%, and the content of aluminum oxide Al is 2 O 3 17.4% of Si, 7.1% of MgAl 2 O 4 The content of the other components is 15.3 percent, and the other components are magnesium, calcium, sodium and potassium metal chlorides and iron, silicon and magnesium oxides.
6. The cement grout of claim 5, wherein CaSO in phosphogypsum 4 91.2% of SiO 2 The content is 7.84%.
7. The preparation method of the cement grouting material is characterized by comprising the following steps:
weighing the components according to the composition and content of the cement grouting material as defined in any one of claims 1 to 6, sequentially putting the sand, the cement, the modified aluminum ash, the modified phosphogypsum and the powdery carboxylic acid into a powdery material stirrer, and uniformly stirring.
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| CN107056102B (en) * | 2017-03-17 | 2020-01-24 | 山东卓联环保科技有限公司 | System and method for producing sulphoaluminate cement and co-producing sulfur by utilizing desulfurized gypsum and aluminum ash |
| CN109987866B (en) * | 2019-04-15 | 2020-03-31 | 山东大学 | Method and system for producing low-alkalinity new mineral system sulphoaluminate cement by using steel slag |
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