CN111410500B - Phosphogypsum ceramsite ball and spherical and gravel type phosphogypsum ceramsite ball light aggregate water stabilization layer - Google Patents

Phosphogypsum ceramsite ball and spherical and gravel type phosphogypsum ceramsite ball light aggregate water stabilization layer Download PDF

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CN111410500B
CN111410500B CN202010350927.3A CN202010350927A CN111410500B CN 111410500 B CN111410500 B CN 111410500B CN 202010350927 A CN202010350927 A CN 202010350927A CN 111410500 B CN111410500 B CN 111410500B
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phosphogypsum
layer
ball
ceramsite
cement
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CN111410500A (en
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吴赤球
吕伟
孙涛
龚文辉
王玉珍
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Hubei Chang Yaoxin Materials Ltd By Share Ltd
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14Compositions 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
    • C04B28/142Compositions 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
    • C04B28/143Compositions 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
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5076Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with masses bonded by inorganic cements
    • C04B41/5085Calcium sulfate cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/60After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
    • C04B41/61Coating or impregnation
    • C04B41/65Coating or impregnation with inorganic materials
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/20Mortars, concrete or artificial stone characterised by specific physical values for the density
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

Abstract

The invention provides a phosphogypsum ceramsite ball which comprises a phosphogypsum core, a over-sulfur phosphogypsum layer wrapped outside the phosphogypsum core and a cement layer wrapped outside the over-sulfur phosphogypsum layer; the phosphogypsum core is formed by granulating undisturbed phosphogypsum, calcium oxide, cement clinker, mineral powder and residual slurry of the electric pole, and the over-sulfur phosphogypsum layer is formed by mixing fine phosphogypsum, slag and cement clinker. Meanwhile, the invention also provides two water-stable layers obtained by applying the phosphogypsum ceramsite spheres, the unconfined compressive strength of the phosphogypsum ceramsite spheres can reach 3-4.8 MPa after 7 days, and the phosphogypsum ceramsite spheres can be used for a base layer structure of heavy traffic in expressways and first-class highways.

Description

Phosphogypsum ceramsite ball and spherical and gravel type phosphogypsum ceramsite ball light aggregate water stabilization layer
Technical Field
The invention relates to the technical field of novel building materials, in particular to a phosphogypsum ceramsite ball and a spherical and broken stone type phosphogypsum ceramsite ball light aggregate water stabilization layer.
Background
The road structure is generally divided into an asphalt concrete layer, a base layer, a gravel cushion layer, a compacted soil base and the like from top to bottom. The base layer is divided into an upper base layer, a lower base layer or a subbase layer, a cement stabilized graded broken stone base layer, which is called a cement stabilized layer for short, is generally adopted, graded broken stones are used as aggregate, a certain amount of cementing materials and enough mortar volume are adopted to fill gaps of the aggregate, and the base layer is paved and compacted according to the embedding and extruding principle. The compactness of the mortar is close to the compactness, the strength mainly depends on the embedding, extruding and locking principles among the gravels, and simultaneously, the mortar has enough volume to fill the gaps of the aggregate. Its initial strength is high, and its strength can be quickly increased with age, and can be quickly formed into plate body, so that it has high strength, and good impermeability and frost resistance. After the water is stable, the material is not muddy when meeting rain and has a solid surface, thus being an ideal base material for road pavement.
In the prior art (CN110451864A), phosphogypsum non-fired ceramsite light aggregate and a preparation method thereof are disclosed, wherein phosphogypsum is used as a main material (more than 80 percent of phosphogypsum), cement is used as an alkaline activator, mineral powder is used as an active material, and the high-strength light aggregate with good waterproof performance is prepared by the processes of modification, granulation, maintenance, crushing, screening and the like, and can be widely used for products such as highway subgrade materials, C40 and lower grade concrete, cement concrete blocks and the like. The ceramsite is used for replacing common broken stones in the water stabilization layer, so that the consumption of phosphogypsum can be increased, waste materials are changed into valuable materials, and broken stone resources are saved.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a phosphogypsum ceramsite ball, which solves the problem that the strength of a water stabilization layer is reduced after ordinary crushed stones in the water stabilization layer are replaced by the ceramsite ball in the prior art.
According to an embodiment of the invention, the phosphogypsum ceramsite ball comprises a phosphogypsum core, a over-sulfur phosphogypsum layer wrapped outside the phosphogypsum core, and a cement layer wrapped outside the over-sulfur phosphogypsum layer; the phosphogypsum core is formed by granulating undisturbed phosphogypsum, calcium oxide, cement clinker, mineral powder and residual slurry of the electric pole, and the over-sulfur phosphogypsum layer is formed by mixing fine phosphogypsum, slag and cement clinker.
Further, the phosphogypsum core is mixed with the mixed components of the sulfur-passing phosphogypsum layer 14-18 hours after granulation, and the sulfur-passing phosphogypsum layer is formed by wrapping.
Further, mixing cement powder 20-28 hours after the persulfate gypsum layer is formed by wrapping, and wrapping to form the cement layer.
Further, the cement powder comprises portland cement and phosphogypsum cement.
Further, the weight ratio of the phosphogypsum core to the peroxodisulfuric gypsum layer to the cement layer is 90-110: 90-110: 3 to 7.
Further, the weight of the residual slurry of the electric pole accounts for 0.5-3% of the weight of the phosphogypsum core.
Furthermore, water accounting for 15-18% of the weight of the phosphogypsum core is mixed in the phosphogypsum core during granulation.
On the other hand, according to the embodiment of the invention, the spherical phosphogypsum ceramsite ball light aggregate water-stable layer comprises phosphogypsum ceramsite balls with the particle size of 9.5-19 mm and phosphogypsum ceramsite balls with the particle size of 4.75-9.5 mm, and common broken stones are replaced by the phosphogypsum ceramsite balls with the corresponding particle size to form a new water-stable layer.
On the other hand, according to the embodiment of the invention, the broken stone type phosphogypsum ceramsite ball light aggregate water stabilization layer comprises phosphogypsum ceramsite ball granules with the particle size of 9.5-19 mm and phosphogypsum ceramsite ball granules with the particle size of 4.75-9.5 mm, and common broken stones are replaced by the phosphogypsum ceramsite ball granules with the corresponding particle size to form a new water stabilization layer.
Furthermore, the phosphogypsum ceramsite ball granules are obtained by crushing phosphogypsum ceramsite balls with larger particle sizes.
Compared with the prior art, the invention has the following beneficial effects:
1) provides a ceramsite ball with a novel structure, the performances such as strength and the like of the ceramsite ball are greatly improved compared with the existing ceramsite ball, wherein the bulk density is improved to 963kg/m3The barrel pressure strength is improved to 9.2Mpa, the softening coefficient is improved to 0.9, and the crushing value is reduced to 10 percent;
2) the spherical and broken stone type phosphogypsum ceramsite light aggregate water stabilization layers are provided, and both the two water stabilization layers can be used for base layer structures of heavy traffic in expressways and first-level highways.
Detailed Description
The technical solution of the present invention is further illustrated by the following examples.
Example 1
The embodiment of the invention provides a phosphogypsum ceramsite ball which comprises a phosphogypsum core, a over-sulfur phosphogypsum layer wrapped outside the phosphogypsum core and a cement layer wrapped outside the over-sulfur phosphogypsum layer; wherein the phosphogypsum core comprises 88 percent of undisturbed phosphogypsum, 0.26 percent of calcium oxide, 4 percent of cement clinker, 7.24 percent of mineral powder and 0.5 percent of residual slurry of an electric pole, and water accounting for 15 percent of the total weight of the phosphogypsum core is added during granulation; the plaster layer of phosphorus sulfide comprises 46 percent of fine phosphorus gypsum, 49 percent of slag and 5 percent of cement clinker which are mixed.
Preferably, the phosphogypsum core is mixed with mixed components of a sulfur-passing phosphogypsum layer 14 hours after granulation, and the sulfur-passing phosphogypsum layer is formed by wrapping.
Preferably, 20 hours after the persulfate gypsum layer is formed by wrapping, cement powder is mixed in to form the cement layer by wrapping.
Preferably, the cement powder comprises 60% portland cement and 40% phosphogypsum cement.
Preferably, the weight ratio of the phosphogypsum core, the peroxodisulfuric gypsum layer and the cement layer is 90: 90: 3.
example 2
The embodiment of the invention provides a phosphogypsum ceramsite ball which comprises a phosphogypsum core, a over-sulfur phosphogypsum layer wrapped outside the phosphogypsum core and a cement layer wrapped outside the over-sulfur phosphogypsum layer; wherein the phosphogypsum core comprises 88 percent of undisturbed phosphogypsum, 0.26 percent of calcium oxide, 4 percent of cement clinker, 5.74 percent of mineral powder and 2 percent of pole residual slurry which are granulated, and water accounting for 16.5 percent of the weight of the phosphogypsum core is also added during granulation; the plaster layer of phosphorus sulfide comprises 45% of fine phosphorus gypsum, 50% of slag and 5% of cement clinker which are mixed.
Preferably, the phosphogypsum core is mixed with mixed components of a sulfur-passing phosphogypsum layer 16 hours after granulation, and the sulfur-passing phosphogypsum layer is formed by wrapping.
Preferably, cement powder is mixed in 24 hours after the gypsum layer of the parathion is formed by wrapping, and the cement layer is formed by wrapping.
Preferably, the cement powder comprises 55% portland cement and 45% phosphogypsum cement.
Preferably, the weight ratio of the phosphogypsum core, the peroxodisulfuric gypsum layer and the cement layer is 100: 100: 5.
example 3
The embodiment of the invention provides a phosphogypsum ceramsite ball which comprises a phosphogypsum core, a over-sulfur phosphogypsum layer wrapped outside the phosphogypsum core and a cement layer wrapped outside the over-sulfur phosphogypsum layer; wherein the phosphogypsum core comprises 88 percent of undisturbed phosphogypsum, 0.26 percent of calcium oxide, 4 percent of cement clinker, 4.74 percent of mineral powder and 3 percent of pole residual slurry which are granulated, and water accounting for 18 percent of the weight of the phosphogypsum core is also added during granulation; the plaster layer of phosphorus sulfide comprises 50% of fine phosphorus gypsum, 45% of slag and 5% of cement clinker which are mixed.
Preferably, the phosphogypsum core is mixed with mixed components of a sulfur-passing phosphogypsum layer 18 hours after granulation, and the sulfur-passing phosphogypsum layer is formed by wrapping.
Preferably, cement powder is mixed in 28 hours after the gypsum layer of the parathion is formed by wrapping, and the cement layer is formed by wrapping.
Preferably, the cement powder comprises 55% portland cement and 45% phosphogypsum cement.
Preferably, the weight ratio of the phosphogypsum core, the peroxodisulfuric gypsum layer and the cement layer is 110: 110: 7.
example 4
Screening the phosphogypsum ceramsite balls with the particle size of 9.5-19 mm and the phosphogypsum ceramsite balls with the particle size of 4.75-9.5 mm from the phosphogypsum ceramsite balls obtained in the above example 2, replacing common crushed stones, and forming a water-stable layer as shown in table 1:
TABLE 1 spherical phosphogypsum ceramsite ball light aggregate water stabilization layer
Figure BDA0002471915460000041
Note: P.O42.5 ordinary portland cement is adopted as cement, S95-grade granulated blast furnace slag powder is adopted as mineral powder, and gypsum is crushed by a crusher to have the fineness of 100-200 meshes.
Example 5
After the phosphogypsum ceramsite balls obtained in the above example 2 are crushed, phosphogypsum ceramsite ball crushed particles with the particle size of 9.5-19 mm and phosphogypsum ceramsite ball crushed particles with the particle size of 4.75-9.5 mm are screened out, common crushed stones are replaced, and a water-stable layer as shown in table 2 is formed:
TABLE 2 Stable layer of light aggregate of broken stone type phosphogypsum ceramsite ball
Figure BDA0002471915460000042
Note: P.O42.5 ordinary portland cement is adopted as cement, S95-grade granulated blast furnace slag powder is adopted as mineral powder, and gypsum is crushed by a crusher to have the fineness of 100-200 meshes.
Comparative example 1
The ceramsite balls provided by CN110451864A are adopted to replace the gravels with corresponding grain sizes to form a new water stable layer, and the method comprises the following steps:
TABLE 3 spherical phosphogypsum ceramsite ball light aggregate water stabilization layer
Figure BDA0002471915460000051
Note: P.O42.5 ordinary portland cement is adopted as cement, S95-grade granulated blast furnace slag powder is adopted as mineral powder, and gypsum is crushed by a crusher to have the fineness of 100-200 meshes.
Comparative example 2
The ceramsite provided by CN110451864A is crushed to obtain ceramsite crushed particles, and the crushed particles with corresponding particle sizes are replaced to form a new water stable layer, which comprises the following steps:
TABLE 4 Stable layer of light aggregate of broken stone type phosphogypsum ceramsite ball
Figure BDA0002471915460000052
Note: P.O42.5 ordinary portland cement is adopted as cement, S95-grade granulated blast furnace slag powder is adopted as mineral powder, and gypsum is crushed by a crusher to have the fineness of 100-200 meshes.
The statistics of the performance parameters of the phosphogypsum ceramsite spheres provided in the embodiments 1-3 and the prior art CN110451864A are shown in the following table 5:
TABLE 5 phosphogypsum ceramsite Properties
Figure BDA0002471915460000053
In comparison example 1, the unconfined compressive strength of the water stabilization layer prepared according to the proportion in 7 days only reaches 3.3MPa, and only can meet the structural standard requirements of base layers and subbase layers of medium and light traffic in roads of the second level and below.
Compared with a comparative example 2, the unconfined compressive strength of the water stabilization layer prepared according to the proportion in 7 days only reaches 2.1MPa, and only can meet the standard requirements of subbase structures of medium and light traffic in roads of the second level and below.
The unconfined compressive strength of the water stabilization layer provided by the embodiments 4 and 5 in 7 days can reach 3-4.8 MPa, and the water stabilization layer can be used for a basic layer structure of heavy traffic in an expressway and a first-level highway; the water stabilization layer provided simultaneously also has the characteristic of shrinking after expansion, avoids the common fault that the cement water stabilization layer is easy to shrink and crack, reduces the dead weight of the water stabilization layer by more than 20 percent, effectively lightens the dead weight of the embankment and the additional stress of a soft soil foundation, reduces the total settlement and increases the stability of the embankment.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims (9)

1. An ardealite ceramsite ball is characterized in that: the composite material comprises a phosphogypsum core, a over-sulfur phosphogypsum layer wrapped outside the phosphogypsum core and a cement layer wrapped outside the over-sulfur phosphogypsum layer; wherein the phosphogypsum core comprises undisturbed phosphogypsum, calcium oxide, cement clinker, mineral powder and residual slurry of the electric pole, and the over-sulfur phosphogypsum layer comprises fine phosphogypsum, slag and cement clinker which are mixed;
the weight ratio of the phosphogypsum core to the peroxodisulfuric gypsum layer to the cement layer is 90-110: 90-110: 3 to 7.
2. The phosphogypsum ceramsite ball as set forth in claim 1, which is characterized in that: and mixing the mixed components of the sulfur-passing phosphogypsum layer into the phosphogypsum core 14-18 hours after granulation, and coating to form the sulfur-passing gypsum layer.
3. The phosphogypsum ceramsite ball as set forth in claim 2, which is characterized in that: and mixing cement powder 20-28 hours after the persulfate gypsum layer is formed by wrapping, and wrapping to form the cement layer.
4. The phosphogypsum ceramsite ball as set forth in claim 3, which is characterized in that: the cement powder comprises Portland cement and phosphogypsum cement.
5. The phosphogypsum ceramsite ball as set forth in claim 1, which is characterized in that: the weight of the residual slurry of the electric pole accounts for 0.5-3% of the weight of the phosphogypsum core.
6. The phosphogypsum ceramsite ball as set forth in claim 1, which is characterized in that: and water accounting for 15-18% of the weight of the phosphogypsum core is also mixed in the phosphogypsum core during granulation.
7. The utility model provides a ball type ardealite haydite ball light aggregate water steady layer which characterized in that: the phosphogypsum ceramsite ball is the phosphogypsum ceramsite ball disclosed by any one of claims 1 to 6, and comprises the phosphogypsum ceramsite ball with the grain size of 9.5-19 mm and the phosphogypsum ceramsite ball with the grain size of 4.75-9.5 mm.
8. A gravel type phosphogypsum ceramsite ball light aggregate water stabilization layer is characterized in that: the phosphogypsum ceramsite ball is the phosphogypsum ceramsite ball disclosed by any one of claims 1 to 6, and comprises phosphogypsum ceramsite ball granules with the grain size of 9.5-19 mm and phosphogypsum ceramsite ball granules with the grain size of 4.75-9.5 mm.
9. The crushed stone type phosphogypsum ceramsite ball light aggregate water-stable layer as claimed in claim 8, which is characterized in that: the phosphogypsum ceramsite ball granules are obtained by crushing phosphogypsum ceramsite balls with larger particle sizes.
CN202010350927.3A 2020-04-28 2020-04-28 Phosphogypsum ceramsite ball and spherical and gravel type phosphogypsum ceramsite ball light aggregate water stabilization layer Active CN111410500B (en)

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CN114133266B (en) * 2021-11-22 2023-08-25 三峡大学 Phosphogypsum cavity mold particle and preparation method of hollow building block
CN115321865B (en) * 2022-06-27 2023-07-14 武汉理工大学 Baking-free artificial phosphogypsum-based lightweight aggregate and preparation method thereof
CN115259729B (en) * 2022-08-19 2023-11-07 湖北昌耀新材料工程技术研究有限责任公司 Sulfurized phosphogypsum-slag cementing material modifier, application thereof and composition of same
CN115521125A (en) * 2022-10-10 2022-12-27 湖北昌耀新材料工程技术研究有限责任公司 Water-stable layer material for heavy traffic in roads below second level
CN115521126A (en) * 2022-10-10 2022-12-27 湖北昌耀新材料工程技术研究有限责任公司 Water stabilizing layer material for heavy traffic in expressway or first-level highway
CN115572089B (en) * 2022-10-14 2023-08-18 武汉理工大学 Phosphogypsum aggregate, radiation-proof ultra-high-performance concrete and preparation method thereof
CN116041026A (en) * 2023-02-13 2023-05-02 湖北昌耀新材料工程技术研究有限责任公司 Phosphogypsum lightweight aggregate concrete and preparation method thereof

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