CN112624693A - Method for preparing concrete by using waste bricks and tiles - Google Patents
Method for preparing concrete by using waste bricks and tiles Download PDFInfo
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- CN112624693A CN112624693A CN202011516434.9A CN202011516434A CN112624693A CN 112624693 A CN112624693 A CN 112624693A CN 202011516434 A CN202011516434 A CN 202011516434A CN 112624693 A CN112624693 A CN 112624693A
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- 239000002699 waste material Substances 0.000 title claims abstract description 71
- 239000011449 brick Substances 0.000 title claims abstract description 59
- 239000004567 concrete Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000005266 casting Methods 0.000 claims abstract description 34
- 239000002131 composite material Substances 0.000 claims abstract description 33
- 239000002994 raw material Substances 0.000 claims abstract description 33
- 239000000843 powder Substances 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims abstract description 28
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims abstract description 14
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims abstract description 14
- 235000019341 magnesium sulphate Nutrition 0.000 claims abstract description 14
- 239000004254 Ammonium phosphate Substances 0.000 claims abstract description 13
- 229910000148 ammonium phosphate Inorganic materials 0.000 claims abstract description 13
- 235000019289 ammonium phosphates Nutrition 0.000 claims abstract description 13
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 claims abstract description 13
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000004576 sand Substances 0.000 claims abstract description 12
- 239000004575 stone Substances 0.000 claims abstract description 12
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000004816 latex Substances 0.000 claims abstract description 3
- 229920000126 latex Polymers 0.000 claims abstract description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 19
- 239000003623 enhancer Substances 0.000 claims description 19
- 239000011398 Portland cement Substances 0.000 claims description 14
- 239000000839 emulsion Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 2
- 238000005336 cracking Methods 0.000 abstract description 14
- 239000004566 building material Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 17
- 230000000052 comparative effect Effects 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- 239000005038 ethylene vinyl acetate Substances 0.000 description 8
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 8
- 238000004901 spalling Methods 0.000 description 7
- 239000004568 cement Substances 0.000 description 5
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- 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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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
- C04B18/16—Waste materials; Refuse from building or ceramic industry
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a method for preparing concrete by using waste bricks and tiles, which belongs to the field of building materials and comprises the steps of crushing the waste bricks and tiles, mixing raw materials and preparing a composite reinforcer, wherein the composite reinforcer is prepared by mixing aluminum sulfate, aluminum ferric silicate, ammonium phosphate, magnesium sulfate and redispersed latex powder, and the mixed raw materials and the composite reinforcer are mixed and then mixed with sand, stone and water for concrete casting. The invention not only effectively utilizes the waste brick tiles, but also has the characteristics of high strength, high hardening speed, no cracking and firm bonding with the basic building after the concrete is cast.
Description
Technical Field
The invention belongs to the field of building materials, and particularly relates to a method for preparing concrete by using waste bricks and tiles.
Background
The waste bricks and tiles are common building wastes, have low economic value of recycling, and are commonly used for roadbed filling at present. The waste bricks and tiles contain a large amount of silicate, alkali metal and other components, and can be used for preparing cement with higher economic value.
The waste brick and tile contains a large amount of silicate and can be used for concrete casting, but the components in the waste brick and tile are complex, so the waste brick and tile are easy to crack, low in strength and poor in bonding effect with a substrate when used for preparing concrete.
Disclosure of Invention
In order to overcome the problems in the background art, the invention provides a method for preparing concrete by using waste bricks and tiles, which not only effectively utilizes the waste bricks and tiles, but also has the characteristics of high strength, high hardening speed, no cracking and firm bonding with a basic building when being used for casting the concrete.
In order to realize the purpose, the invention is realized by the following technical scheme:
the method for preparing the concrete by using the waste tiles comprises the following steps:
(1) crushing the waste bricks and tiles to 170-200 meshes to obtain waste brick and tile powder;
(2) adding portland cement and a water reducing agent into the waste brick and tile powder, and fully mixing to obtain a mixed raw material;
(3) mixing aluminum sulfate, aluminum ferric silicate, ammonium phosphate, magnesium sulfate and redispersed rubber powder to obtain a composite reinforcer;
(4) mixing the mixed raw materials and the composite reinforcer, adding sand, stone and water, and then using for concrete casting.
Further, the mixed raw materials in the step (2) comprise the following components in percentage by mass: 32-40% of waste brick and tile powder, 3-5% of water reducing agent and the balance of portland cement.
Further, the mass ratio of the composite reinforcer in the step (1) is 20-30% of aluminum sulfate, 15-25% of aluminum ferric silicate, 10-18% of ammonium phosphate, 8-16% of magnesium sulfate and the balance of re-dispersed latex powder.
Furthermore, the mass ratio of the mixed raw materials to the composite enhancer is 9.95-9.99: 1.
Further, the water reducing agent is a polyhydroxy high-performance water reducing agent.
The casting temperature of the concrete is more than 20 ℃.
The invention has the beneficial effects that:
the composite reinforcer is used, so that the composite reinforcer and the mixed raw materials are combined during concrete casting, the cast concrete has high strength and is not cracked, and the concrete is firmly bonded with a matrix such as a reinforcing steel bar.
The invention takes the waste bricks and tiles as one of the raw materials, not only effectively utilizes the waste bricks and tiles, but also has the characteristics of high strength, no cracking and high hardening speed after concrete casting, and is firmly bonded with the matrix.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, preferred embodiments of the present invention will be described in detail below to facilitate understanding of the skilled person.
The method for preparing concrete by using waste bricks and tiles comprises the following steps:
(1) crushing the waste bricks and tiles to 170-200 meshes to obtain waste brick and tile powder; the waste tile can be effectively mixed with other materials after being crushed, and is easily crosslinked and cured together with other raw materials under the action of a composite reinforcer, so that a structure which is stable in structure, high in strength and not easy to crack is obtained.
(2) Adding Portland cement and a polyhydroxy high-performance water reducing agent into the waste brick and tile powder, and fully mixing to obtain a mixed raw material, wherein the waste brick and tile powder is 32-40%, the water reducing agent is 3-5%, and the balance is Portland cement.
(3) Mixing 20-30% of aluminum sulfate, 15-25% of aluminum ferric silicate, 10-18% of ammonium phosphate, 8-16% of magnesium sulfate and the balance of re-dispersed emulsion powder to obtain the composite enhancer. After the aluminum sulfate and the ferric aluminum silicate are added with water for construction, an acid environment and positive charges can be provided, so that the redispersed rubber powder and the water reducing agent are effectively dissolved and dispersed and are firmly adsorbed with other raw materials, and the structure after solidification is more stable. The addition of magnesium sulfate and ammonium sulfate can react with trace phosphorus plasma in the waste tiles to form trace fine crystals, the generated crystals have strong induction effect, the hardening of cement can be accelerated, the hardened cement generates mutual crosslinking effect, the structure is more stable, the strength is high, and the cement is not cracked.
(4) Mixing the mixed raw materials and the composite reinforcer according to a mass ratio of 9.95-9.99:1, adding sand, stone and water, and then using the mixture for casting concrete, wherein the casting temperature is higher than 20 ℃. When the temperature is higher than 20 ℃, the ammonium phosphate and the magnesium sulfate can be quickly dissolved and react to generate fine crystals, and the fine crystals interact with the ferric aluminum silicate and the aluminum sulfate to increase the stability of the whole concrete structure.
Example 1
Method for preparing concrete by using waste bricks and tiles
(1) And crushing the waste bricks and tiles to 170 meshes to obtain the waste brick and tile powder.
(2) Fully mixing 5% of polyhydroxy high-performance water reducing agent, 40% of waste brick and tile powder and the balance of portland cement to obtain a mixed raw material.
(3) Mixing 25% of aluminum sulfate, 20% of aluminum ferric silicate, 10% of ammonium phosphate, 10% of magnesium sulfate and the balance of ethylene-vinyl acetate copolymer to obtain the composite enhancer.
(4) Mixing the mixed raw materials and the composite enhancer according to the mass ratio of 9.97: 1.
(5) And (3) adding the materials in the step (4) into sand, stone and water, mixing the materials in a mass ratio of 150:350:280:35, and casting the mixture for plain concrete at a casting temperature of 25 ℃ to ensure that the temperature of the concrete before initial setting is not lower than 20 ℃.
Table 1 example 1 test results after concrete casting
| Detecting items | Compressive strength/MPa | Tensile Strength/MPa | Cracking after 90d curing |
| Index (I) | 42.54 | 5.82 | Without cracking or spalling |
Comparative example 1
(1) And crushing the waste bricks and tiles to 170 meshes to obtain the waste brick and tile powder.
(2) Fully mixing 5% of polyhydroxy high-performance water reducing agent, 40% of waste brick and tile powder and the balance of portland cement to obtain a mixed raw material.
(3) 31.25 percent of aluminum sulfate, 25 percent of ferric aluminum silicate and the balance of ethylene-vinyl acetate copolymer are mixed to obtain the composite reinforcer.
(4) Mixing the mixed raw materials and the composite enhancer according to the mass ratio of 9.97: 1.
(5) And (3) adding the materials in the step (4) into sand, stone and water, mixing the materials in a mass ratio of 150:350:280:35, and casting the mixture for plain concrete at a casting temperature of 25 ℃ to ensure that the temperature of the concrete before initial setting is not lower than 20 ℃.
Table 2 test results of comparative example 1 after concrete casting
| Detecting items | Compressive strength/MPa | Tensile Strength/MPa | Cracking after 90d curing |
| Index (I) | 23.54 | 1.82 | With obvious cracks and spalling |
Comparative example 2
(1) And crushing the waste bricks and tiles to 170 meshes to obtain the waste brick and tile powder.
(2) Fully mixing 5% of polyhydroxy high-performance water reducing agent, 40% of waste brick and tile powder and the balance of portland cement to obtain a mixed raw material.
(3) And mixing 18.2% of ammonium phosphate, 18.2% of magnesium sulfate and the balance of ethylene-vinyl acetate copolymer to obtain the composite enhancer.
(4) Mixing the mixed raw materials and the composite enhancer according to the mass ratio of 9.97: 1.
(5) And (3) adding the materials in the step (4) into sand, stone and water, mixing the materials in a mass ratio of 150:350:280:35, and casting the mixture for plain concrete at a casting temperature of 25 ℃ to ensure that the temperature of the concrete before initial setting is not lower than 20 ℃.
TABLE 3 test results of comparative example 2 after concrete casting
| Detecting items | Compressive strength/MPa | Tensile Strength/MPa | Cracking after 90d curing |
| Index (I) | 32.54 | 3.82 | Having cracks and not peeling off |
Example 2
Method for preparing concrete by using waste bricks and tiles
(1) And crushing the waste bricks and tiles to 170 meshes to obtain the waste brick and tile powder.
(2) Fully mixing 4% of polyhydroxy high-performance water reducing agent, 35% of waste brick and tile powder and the balance of portland cement to obtain a mixed raw material.
(3) Mixing 15% of aluminum sulfate, 20% of aluminum ferric silicate, 18% of ammonium phosphate, 16% of magnesium sulfate and the balance of ethylene-vinyl acetate copolymer to obtain the composite enhancer.
(4) Mixing the mixed raw materials and the composite enhancer according to the mass ratio of 9.97: 1.
(5) And (3) adding the materials in the step (4) into sand, stone and water, mixing the materials in a mass ratio of 150:350:280:35, and casting the mixture for plain concrete at a casting temperature of 25 ℃ to ensure that the temperature of the concrete before initial setting is not lower than 20 ℃.
Table 4 example 2 test results after concrete casting
| Detecting items | Compressive strength/MPa | Tensile Strength/MPa | Cracking after 90d curing |
| Index (I) | 46.84 | 4.25 | Without cracking or spalling |
Comparative example 3
Method for preparing concrete by using waste bricks and tiles
(1) And crushing the waste bricks and tiles to 170 meshes to obtain the waste brick and tile powder.
(2) Fully mixing 4% of polyhydroxy high-performance water reducing agent, 35% of waste brick and tile powder and the balance of portland cement to obtain a mixed raw material.
(3) Mixing 22.7% of aluminum sulfate, 30.3% of ferric aluminum silicate and the balance of ethylene-vinyl acetate copolymer to obtain the composite enhancer.
(4) Mixing the mixed raw materials and the composite enhancer according to the mass ratio of 9.97: 1.
(5) And (3) adding the materials in the step (4) into sand, stone and water, mixing the materials in a mass ratio of 150:350:280:35, and casting the mixture for plain concrete at a casting temperature of 25 ℃ to ensure that the temperature of the concrete before initial setting is not lower than 20 ℃.
TABLE 5 test results of comparative example 3 after concrete casting
| Detecting items | Compressive strength/MPa | Tensile Strength/MPa | Cracking after 90d curing |
| Index (I) | 28.26 | 2.82 | With obvious cracks and spalling |
Comparative example 4
(1) And crushing the waste bricks and tiles to 170 meshes to obtain the waste brick and tile powder.
(2) Fully mixing 4% of polyhydroxy high-performance water reducing agent, 35% of waste brick and tile powder and the balance of portland cement to obtain a mixed raw material.
(3) And mixing 27.7% of ammonium phosphate, 24.6% of magnesium sulfate and the balance of ethylene-vinyl acetate copolymer to obtain the composite enhancer.
(4) Mixing the mixed raw materials and the composite enhancer according to the mass ratio of 9.97: 1.
(5) And (3) adding the materials in the step (4) into sand, stone and water, mixing the materials in a mass ratio of 150:350:280:35, and casting the mixture for plain concrete at a casting temperature of 25 ℃ to ensure that the temperature of the concrete before initial setting is not lower than 20 ℃.
TABLE 6 test results of comparative example 4 after concrete casting
| Detecting items | Compressive strength/MPa | Tensile Strength/MPa | Cracking after 90d curing |
| Index (I) | 28.56 | 3.75 | Has cracks |
Example 3
Method for preparing concrete by using waste bricks and tiles
(1) And crushing the waste bricks and tiles to 170 meshes to obtain the waste brick and tile powder.
(2) Fully mixing 4% of polyhydroxy high-performance water reducing agent, 32% of waste brick and tile powder and the balance of portland cement to obtain a mixed raw material.
(3) Mixing 20% of aluminum sulfate, 20% of aluminum ferric silicate, 12% of ammonium phosphate, 14% of magnesium sulfate and the balance of ethylene-vinyl acetate copolymer to obtain the composite enhancer.
(4) Mixing the mixed raw materials and the composite enhancer in a mass ratio of 9.99: 1.
(5) And (3) adding the materials in the step (4) into sand, stone and water, mixing the materials in a mass ratio of 150:350:280:35, and casting the mixture for plain concrete at a casting temperature of 25 ℃ to ensure that the temperature of the concrete before initial setting is not lower than 20 ℃.
Table 7 example 3 test results after concrete casting
| Detecting items | Compressive strength/MPa | Tensile Strength/MPa | Cracking after 90d curing |
| Index (I) | 42.28 | 5.29 | Without cracking or spalling |
Comparative example 5
Method for preparing concrete by using waste bricks and tiles
(1) The waste tiles are crushed to 100-230 meshes to obtain the waste tile powder.
(2) Fully mixing 4% of polyhydroxy high-performance water reducing agent, 32% of waste brick and tile powder and the balance of portland cement to obtain a mixed raw material.
(3) Mixing 20% of aluminum sulfate, 20% of aluminum ferric silicate, 12% of ammonium phosphate, 14% of magnesium sulfate and the balance of ethylene-vinyl acetate copolymer to obtain the composite enhancer.
(5) Mixing the mixed raw materials and the composite enhancer in a mass ratio of 9.99: 1.
(5) And (3) adding the materials in the step (4) into sand, stone and water, mixing the materials in a mass ratio of 150:350:280:35, and casting the mixture for plain concrete at a casting temperature of 25 ℃ to ensure that the temperature of the concrete before initial setting is not lower than 20 ℃.
TABLE 8 detection results of fineness of waste tiles on concrete after construction
| Number of meshes of waste bricks and tiles | Cracking after 90d curing | Compressive strength/MPa | Tensile Strength/MPa |
| 120 | Obvious cracks | 22.56 | 1.22 |
| 140 | Obvious cracks | 22.87 | 1.56 |
| 170 | Without cracks and spalling | 37.35 | 3.99 |
| 230 | Without cracks and spalling | 44.82 | 5.76 |
The self-leveling cement prepared can be effectively combined with other raw materials only after the brick and tile are crushed to 170 meshes in fineness, probably because the components in the waste brick and tile are complex, and the pore structure and the activity can be effectively combined with a composite reinforcer to form a stable structure only when the granularity is small enough.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (6)
1. A method for preparing concrete by using waste bricks and tiles is characterized by comprising the following steps: the method for preparing the concrete by using the waste tiles comprises the following steps:
(1) crushing the waste bricks and tiles to 170-200 meshes to obtain waste brick and tile powder;
(2) adding portland cement and a water reducing agent into the waste brick and tile powder, and fully mixing to obtain a mixed raw material;
(3) mixing aluminum sulfate, aluminum ferric silicate, ammonium phosphate, magnesium sulfate and redispersed latex powder to obtain a composite enhancer;
(4) mixing the mixed raw materials and the composite reinforcer, adding sand, stone and water, and then using for concrete casting.
2. The method for preparing concrete from waste tiles according to claim 1, characterized in that: the mixed raw materials in the step (2) comprise the following components in percentage by mass: 32-40% of waste brick and tile powder, 3-5% of water reducing agent and the balance of portland cement.
3. The method for preparing concrete from waste tiles according to claim 1, characterized in that: the mass ratio of the composite reinforcer in the step (1) is 20-30% of aluminum sulfate, 15-25% of aluminum ferric silicate, 10-18% of ammonium phosphate, 8-16% of magnesium sulfate and the balance of re-dispersed emulsion powder.
4. A method for the preparation of concrete from waste tiles according to any one of claims 1 to 3, characterized in that: the mass ratio of the mixed raw materials to the composite enhancer is 9.95-9.99: 1.
5. The method for preparing concrete from waste tiles according to claim 1, characterized in that: the water reducing agent is a polyhydroxy high-performance water reducing agent.
6. The method for the preparation of concrete from waste tiles according to any one of claims 1 to 5, characterized in that: the casting temperature of the concrete is more than 20 ℃.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112830736A (en) * | 2021-01-21 | 2021-05-25 | 北京惠地智能技术研究院有限公司 | Method for manufacturing self-leveling cement by using waste bricks and tiles |
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