CN110818376A - Novel road retarding cement and preparation method thereof - Google Patents
Novel road retarding cement and preparation method thereof Download PDFInfo
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- CN110818376A CN110818376A CN201911283051.9A CN201911283051A CN110818376A CN 110818376 A CN110818376 A CN 110818376A CN 201911283051 A CN201911283051 A CN 201911283051A CN 110818376 A CN110818376 A CN 110818376A
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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
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
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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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- 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)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses novel road retarding cement and a preparation method thereof, wherein the novel road retarding cement comprises the following components in parts by mass: 50-65 parts of cement clinker, 15-25 parts of fly ash, 8-15 parts of limestone waste residues, 5-10 parts of modified phosphogypsum, 5-8 parts of mixed retarder, 3-5 parts of lignosulfonate and 2-3 parts of nano montmorillonite. The novel road retarding cement has the advantages of proper setting time, high early strength, quick increase of later strength, high breaking strength, good wear resistance, small drying shrinkage and the like, meets the road construction requirements, realizes the high-efficiency resource utilization of solid wastes such as carbon-containing shale, limestone waste residues and the like, and has important economic and social benefits; the preparation method has simple operation steps and high implementation feasibility.
Description
Technical Field
The invention relates to the technical field of cement production, in particular to novel road retarding cement and a preparation method thereof.
Background
Cement is a powdery hydraulic inorganic binder which can be formed into a slurry after being stirred with water, and can be hardened in the air or better in water, and can firmly bind sand, stone and the like together. The early lime and pozzolan mixtures are similar to modern lime and pozzolan cements, and concrete made by cementing crushed stone with them not only has higher strength after hardening, but also resists erosion by fresh water or salt-containing water.
The road cement is a special cement prepared by grinding silicate clinker of road, a certain amount of mixed material and a proper amount of gypsum, and is mainly applied to the road engineering of runways, urban and rural highways and the like. In the road construction process, because the time periods of construction stirring, paving, compacting and the like are long and need to be finished before the cement is completely hardened, a user requires that the initial setting time of the cement is more than 4 hours and the final setting time is not less than 6 hours according to the site construction condition. However, in the prior art, the initial setting time of the road delayed coagulation cement is not long enough, so that the cement is not solidified and hardened after the work of mixing, paving, compacting and the like of the road is often finished, thereby causing the quality of the paved road to be reduced. Therefore, it is necessary to develop a new road retarding cement with a moderate initial setting time.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the novel road retarding cement and the preparation method thereof, the novel road retarding cement has the advantages of proper setting time, high early strength, quick increase of later strength, high breaking strength, good wear resistance, small drying shrinkage and the like, and simultaneously realizes the high-efficiency resource utilization of solid wastes such as carbon-containing shale, limestone waste residues and the like, thereby having important economic benefit and social benefit; the preparation method has simple operation steps and high implementation feasibility.
In order to achieve the aim, the technical scheme of the invention is to design a novel road retarding cement, which comprises the following components in parts by mass: 50-65 parts of cement clinker, 15-25 parts of fly ash, 8-15 parts of limestone waste residues, 5-10 parts of modified phosphogypsum, 5-8 parts of mixed retarder, 3-5 parts of lignosulfonate and 2-3 parts of nano montmorillonite.
The preferable technical scheme is that the mixed retarder is a compound of organic phosphonate and inorganic phosphate, and the mass ratio of the organic phosphonate to the inorganic phosphate is 1: 1-3.
Further preferably, the cement clinker comprises the following components in percentage by mass: 70-90 parts of Portland cement clinker, 8-20 parts of carbonaceous shale, 2-8 parts of iron raw material and 1-3 parts of desulfurized gypsum.
Further preferably, the irony raw material is selected from one or more of sulfuric acid slag, converter slag, iron ore or iron tailings, and the mass proportions of the components in the irony raw material are equal. .
The further preferable technical scheme is that the expanded perlite powder comprises 2-3 parts of expanded perlite powder and 1-2 parts of polyacrylamide.
In order to facilitate the smooth preparation and application implementation of the novel road retarding cement, a preparation method of the novel road retarding cement is provided, and the preparation method of the novel road retarding cement comprises the following steps:
s1: pulverizing each raw material separately, and sieving to remove over 200 μm residue;
s2: adding the raw material components into a suspension machine according to the mass ratio, and uniformly mixing to obtain premixed raw material powder;
s3: sending the premixed raw material powder to a predecomposition kiln, preheating and decomposing the premixed raw material powder in a preheater, then calcining the premixed raw material powder at a high temperature in a rotary kiln, and cooling the premixed raw material powder by a grate cooler to obtain a cement clinker crude product;
s4: and grinding the cement clinker crude product by a roller press and a ball mill to obtain the novel road retarding cement finished product.
In the preferable technical scheme, in the step S3, the calcining temperature is 1200-1200 ℃.
The preferable technical scheme is that the cement clinker crude product in the step S4 is extruded and crushed into fine powder by a roller press circulating system, the fine powder is separated by a V-shaped powder concentrator, and the specific surface area of the powder is 170-200 m2Feeding the powder in the range of/kg into a circulating system of a ball mill, and continuously extruding and crushing coarse powder by a roller press; and (S4) grinding the fine powder separated by the roller press circulating system in the step S4 by the ball mill circulating system, sorting the fine powder by an O-Sepa powder concentrator, and separating out the fine powder with the specific surface area of 340-420 m2The fine powder in the/kg range is used as the cement product and the coarse powder is ground further by the ball mill.
The invention has the advantages and beneficial effects that:
the novel road retarding cement has the advantages of proper setting time, high early strength, quick increase of later strength, high breaking strength, good wear resistance, small drying shrinkage and the like, meets the road construction requirements, realizes the high-efficiency resource utilization of solid wastes such as carbon-containing shale, limestone waste residues and the like, and has important economic and social benefits; the preparation method has simple operation steps and high implementation feasibility.
Detailed Description
The following further describes embodiments of the present invention with reference to examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
The novel road retarding cement comprises the following components in parts by mass: 50 parts of cement clinker, 15 parts of fly ash, 8 parts of limestone waste residues, 5 parts of modified phosphogypsum, 5 parts of mixed retarder, 3 parts of lignosulfonate and 2 parts of nano montmorillonite. The mixed retarder is a compound of organic phosphonate and inorganic phosphate, and the mass ratio of the organic phosphonate to the inorganic phosphate is 1: 1. The cement clinker comprises the following components in parts by mass: 70 parts of Portland cement clinker, 8 parts of carbonaceous shale, 2 parts of iron raw material and 1 part of desulfurized gypsum. The iron raw material is sulfuric acid slag.
The preparation method of the novel road retarding cement comprises the following steps:
s1: pulverizing each raw material separately, and sieving to remove over 200 μm residue;
s2: adding the raw material components into a suspension machine according to the mass ratio, and uniformly mixing to obtain premixed raw material powder;
s3: sending the premixed raw material powder to a pre-decomposition kiln, preheating and decomposing the premixed raw material powder in a preheater, then calcining the premixed raw material powder in a rotary kiln at a high temperature of 1200-1200 ℃, and cooling the premixed raw material powder by a grate cooler to obtain a cement clinker crude product;
s4: and grinding the cement clinker crude product by a roller press and a ball mill to obtain the novel road retarding cement finished product.
Preferably, the cement clinker crude product in the step S4 is extruded and crushed into fine powder by a roller press circulating system, the fine powder is separated by a V-shaped powder concentrator, and the specific surface area of the powder is 170-200 m2Feeding the powder in the range of/kg into a circulating system of a ball mill, and continuously extruding and crushing coarse powder by a roller press; and (S4) grinding the fine powder separated by the roller press circulating system in the step S4 by the ball mill circulating system, sorting the fine powder by an O-Sepa powder concentrator, and separating out the fine powder with the specific surface area of 340-420 m2Fine powder in the/kg range as cement product, coarse powderThe milling was continued by the ball mill.
Example 2
The novel road retarding cement comprises the following components in parts by mass: 60 parts of cement clinker, 20 parts of fly ash, 12 parts of limestone waste residues, 8 parts of modified phosphogypsum, 6 parts of mixed retarder, 4 parts of lignosulfonate and 3 parts of nano montmorillonite. The mixed retarder is a compound of organic phosphonate and inorganic phosphate, and the mass ratio of the organic phosphonate to the inorganic phosphate is 1: 2. The cement clinker comprises the following components in parts by mass: 80 parts of Portland cement clinker, 15 parts of carbonaceous shale, 5 parts of iron raw material and 2 parts of desulfurized gypsum. The iron raw material is a mixture of iron ore and iron tailings, and the mass ratio of the iron raw material to the iron tailings is 1: 1.
The preparation method of the novel road retarding cement in the example 2 is the same as that of the example 1.
Example 3
The novel road retarding cement comprises the following components in parts by mass: 65 parts of cement clinker, 25 parts of fly ash, 15 parts of limestone waste residues, 10 parts of modified phosphogypsum, 8 parts of mixed retarder, 5 parts of lignosulfonate and 2 parts of nano montmorillonite. The mixed retarder is a compound of organic phosphonate and inorganic phosphate, and the mass ratio of the organic phosphonate to the inorganic phosphate is 1: 3. The cement clinker comprises the following components in parts by mass: 90 parts of Portland cement clinker, 20 parts of carbonaceous shale, 8 parts of iron raw material and 3 parts of desulfurized gypsum. The iron raw material is a mixture of iron ore and iron tailings, and the mass ratio of the iron raw material to the iron tailings is 1: 3.
The preparation method of the novel road retarding cement in the example 3 is the same as that of the example 1.
Example 4
A novel road retarding cement, example 4 is different from example 1 in that the novel road retarding cement further comprises 2 parts of expanded perlite powder and 1 part of polyacrylamide.
Example 5
A novel road retarding cement, example 5 is different from example 1 in that the novel road retarding cement further comprises 3 parts of expanded perlite powder and 2 parts of polyacrylamide.
The test method comprises the following steps: the novel road delayed coagulation cement samples in the embodiments 1-5 are prepared into standard samples according to GB/T1346-2011 'test method for water consumption, coagulation time and stability of standard consistency of cement', and the physical properties of the samples, such as initial setting time, final setting time and the like, are measured, and the test results are shown in Table 1.
Table 1 Performance parameters of novel road set-retarding cement samples in examples 1-5
Experiments show that: as can be seen from table 1, the initial setting time of the novel road retarded cement samples obtained by the preparation method of the invention in examples 1 to 5 is not less than 250min, and the final setting time is 370 to 380min, and the novel road retarded cement samples have excellent performances such as standard consistency, 3-day compression resistance, 3-day fracture resistance, 28-day compression resistance, 28-day fracture resistance, 28-day shrinkage rate, 28-day wear resistance and the like, and meet the relevant regulations of the road cement, thereby achieving the purpose of the invention.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. The novel road retarding cement is characterized by comprising the following components in parts by mass: 50-65 parts of cement clinker, 15-25 parts of fly ash, 8-15 parts of limestone waste residues, 5-10 parts of modified phosphogypsum, 5-8 parts of mixed retarder, 3-5 parts of lignosulfonate and 2-3 parts of nano montmorillonite.
2. The novel road retarding cement as claimed in claim 1, wherein the mixed retarder is a compound of organic phosphonate and inorganic phosphate, and the mass ratio of the organic phosphonate to the inorganic phosphate is 1: 1-3.
3. The novel road retarding cement as claimed in claim 2, wherein the cement clinker comprises the following components by mass: 70-90 parts of Portland cement clinker, 8-20 parts of carbonaceous shale, 2-8 parts of iron raw material and 1-3 parts of desulfurized gypsum.
4. The novel road retarding cement as claimed in claim 3, wherein the ferrous raw material is selected from one or more of pyrite cinder, converter slag, iron ore or iron tailings, and the mass ratio of each component in the ferrous raw material is equal.
5. The novel road retarding cement as claimed in claim 4, further comprising 2-3 parts of expanded perlite powder and 1-2 parts of polyacrylamide.
6. A preparation method of novel road retarding cement, which is characterized by preparing the novel road retarding cement as claimed in any one of claims 1-5, and comprises the following steps:
s1: pulverizing each raw material separately, and sieving to remove over 200 μm residue;
s2: adding the raw material components into a suspension machine according to the mass ratio, and uniformly mixing to obtain premixed raw material powder;
s3: sending the premixed raw material powder to a predecomposition kiln, preheating and decomposing the premixed raw material powder in a preheater, then calcining the premixed raw material powder at a high temperature in a rotary kiln, and cooling the premixed raw material powder by a grate cooler to obtain a cement clinker crude product;
s4: and grinding the cement clinker crude product by a roller press and a ball mill to obtain the novel road retarding cement finished product.
7. The method for preparing novel road retarding cement as claimed in claim 6, wherein in step S3, the calcining temperature is 1200-1200 ℃.
8. The method for preparing novel road retarding cement as claimed in claim 6, wherein the crude product of the cement clinker in the step S4 is crushed into fine powder by extrusion through a circulation system of a roller press, and the fine powder is separated by a V-shaped powder concentrator, and the specific surface area of the powder concentrator is 170-200 m2Feeding the powder in the range of/kg into a circulating system of a ball mill, and continuously extruding and crushing coarse powder by a roller press; the roller press circulating system in the step S4 is separatedGrinding the powder by a circulating system of a ball mill, separating by an O-Sepa powder concentrator, and separating out the powder with the specific surface area of 340-420 m2The fine powder in the/kg range is used as the cement product and the coarse powder is ground further by the ball mill.
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| CN201911283051.9A CN110818376A (en) | 2019-12-13 | 2019-12-13 | Novel road retarding cement and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112194390A (en) * | 2020-09-07 | 2021-01-08 | 黄山精强建材股份有限公司 | Production method of retarded cement |
| CN112456827A (en) * | 2020-11-30 | 2021-03-09 | 中国葛洲坝集团水泥有限公司 | Road base retarding cement and preparation method thereof |
| CN113277757A (en) * | 2021-06-29 | 2021-08-20 | 五河中联水泥有限公司 | High-speed roadbed cement and application method thereof |
| CN113321439A (en) * | 2021-06-29 | 2021-08-31 | 五河中联水泥有限公司 | Application method of retarder in cement |
| CN113845319A (en) * | 2021-10-20 | 2021-12-28 | 喀喇沁草原水泥有限责任公司 | Portland cement and preparation method thereof |
| CN116177908A (en) * | 2023-02-23 | 2023-05-30 | 广西柳州鱼峰水泥有限公司 | Retarded silicate cement for road base and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112194390A (en) * | 2020-09-07 | 2021-01-08 | 黄山精强建材股份有限公司 | Production method of retarded cement |
| CN112456827A (en) * | 2020-11-30 | 2021-03-09 | 中国葛洲坝集团水泥有限公司 | Road base retarding cement and preparation method thereof |
| CN113277757A (en) * | 2021-06-29 | 2021-08-20 | 五河中联水泥有限公司 | High-speed roadbed cement and application method thereof |
| CN113321439A (en) * | 2021-06-29 | 2021-08-31 | 五河中联水泥有限公司 | Application method of retarder in cement |
| CN113845319A (en) * | 2021-10-20 | 2021-12-28 | 喀喇沁草原水泥有限责任公司 | Portland cement and preparation method thereof |
| CN116177908A (en) * | 2023-02-23 | 2023-05-30 | 广西柳州鱼峰水泥有限公司 | Retarded silicate cement for road base and preparation method thereof |
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Application publication date: 20200221 |