CN114105584A - Waste residue concrete brick and preparation method thereof - Google Patents
Waste residue concrete brick and preparation method thereof Download PDFInfo
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- CN114105584A CN114105584A CN202111230611.1A CN202111230611A CN114105584A CN 114105584 A CN114105584 A CN 114105584A CN 202111230611 A CN202111230611 A CN 202111230611A CN 114105584 A CN114105584 A CN 114105584A
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- 239000002699 waste material Substances 0.000 title claims abstract description 73
- 239000011456 concrete brick Substances 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 34
- 239000011449 brick Substances 0.000 claims abstract description 134
- 239000002994 raw material Substances 0.000 claims abstract description 93
- 238000002156 mixing Methods 0.000 claims abstract description 51
- 239000002893 slag Substances 0.000 claims abstract description 48
- 239000000843 powder Substances 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 230000029087 digestion Effects 0.000 claims abstract description 34
- 239000003607 modifier Substances 0.000 claims abstract description 32
- 230000032683 aging Effects 0.000 claims abstract description 24
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims abstract description 23
- 239000010881 fly ash Substances 0.000 claims abstract description 23
- 238000003756 stirring Methods 0.000 claims abstract description 23
- 238000012797 qualification Methods 0.000 claims abstract description 20
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 45
- 239000000463 material Substances 0.000 claims description 42
- 238000000034 method Methods 0.000 claims description 29
- 238000001514 detection method Methods 0.000 claims description 24
- 229910052681 coesite Inorganic materials 0.000 claims description 18
- 229910052906 cristobalite Inorganic materials 0.000 claims description 18
- 239000000377 silicon dioxide Substances 0.000 claims description 18
- 235000012239 silicon dioxide Nutrition 0.000 claims description 18
- 229910052682 stishovite Inorganic materials 0.000 claims description 18
- 229910052905 tridymite Inorganic materials 0.000 claims description 18
- 238000007689 inspection Methods 0.000 claims description 17
- 238000003825 pressing Methods 0.000 claims description 15
- 238000005303 weighing Methods 0.000 claims description 15
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 229910052593 corundum Inorganic materials 0.000 claims description 9
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- 239000004576 sand Substances 0.000 claims description 9
- 239000002904 solvent Substances 0.000 claims description 9
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 9
- 230000015556 catabolic process Effects 0.000 claims description 8
- 238000006731 degradation reaction Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000000748 compression moulding Methods 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 abstract description 7
- 230000006378 damage Effects 0.000 abstract description 6
- 239000002910 solid waste Substances 0.000 abstract description 6
- 238000011161 development Methods 0.000 abstract description 5
- 230000018109 developmental process Effects 0.000 abstract description 5
- 238000004134 energy conservation Methods 0.000 abstract description 5
- 238000004064 recycling Methods 0.000 abstract description 5
- 230000009467 reduction Effects 0.000 abstract description 5
- 239000000292 calcium oxide Substances 0.000 description 23
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 23
- 239000004927 clay Substances 0.000 description 11
- 230000009286 beneficial effect Effects 0.000 description 9
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 7
- 238000005336 cracking Methods 0.000 description 7
- 238000009826 distribution Methods 0.000 description 7
- 238000005452 bending Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 239000004744 fabric Substances 0.000 description 6
- 238000007676 flexural strength test Methods 0.000 description 6
- 238000004806 packaging method and process Methods 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000004566 building material Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
- C04B28/14—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
-
- 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
- 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
Abstract
The invention provides a waste residue concrete brick and a preparation method thereof, and relates to the technical field of concrete bricks. The waste residue concrete brick provided by the invention comprises the following raw materials in percentage by weight: 10-30% of carbide slag, 7-20% of fly ash, 20-40% of phosphogypsum, 5-15% of modifier, 1-5% of water reducer and 15-35% of aggregate; the autoclaved brick is prepared by stirring and mixing, primary powder mixing, digestion and aging, secondary powder mixing, press forming and autoclaved curing, the finished autoclaved brick has a smooth appearance, the flexural strength and the compressive strength meet the use requirements, and the finished product qualification rate is high; the utilization rate of the solid waste can be effectively improved, the harm to the environment is reduced, the comprehensive utilization concept of the waste in the national medium-long scientific and technological development planning compendium is met, the requirement of the country on environmental protection is met, and energy conservation, emission reduction and waste recycling are realized.
Description
Technical Field
The invention relates to the technical field of concrete bricks, in particular to a waste residue concrete brick and a preparation method thereof.
Background
In China, the production and use of common clay bricks have been over 3000 years. Although the use of the common clay bricks damages a large amount of cultivated land, the common clay bricks are one of the main wall materials for a considerable time due to low price, durability, simple process, mature design and construction technology, use inertia of people and the like.
According to the data analysis of the science and technology department of the Ministry of construction, the energy-consuming building area of China is 700 hundred million meters2And a certain part of buildings are original clay bricks and stone walls, so that the energy consumption is high. 70% of house materials in China are wall materials. Among the numerous wall materials, the traditional solid clay brick still has an absolute advantage in yield. However, the solid clay brick consumes more than 10 billion cubic meters of clay resources every year, which is equivalent to 50 ten thousand mu of land destroyed, and consumes more than 7000 ten thousand tons of standard coal. The building energy consumption and the building material consumption of China approximately account for 40 percent of the total national energy consumption, and the cultivated land is seriously damaged in the clay brick manufacturing process.
In addition, since the new environmental protection method is implemented in 2015, higher requirements are put forward for environmental protection of the common infrastructure industry of making bricks by using clay. Therefore, there is a need to develop a more environmentally friendly wall material.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a waste residue concrete brick and a preparation method thereof, and solves the technical problems of large energy consumption and environmental pollution of the traditional solid clay brick.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme:
a preparation method of a waste residue concrete brick comprises the following raw materials in percentage by weight: 10-30% of carbide slag, 7-20% of fly ash, 20-40% of phosphogypsum, 5-15% of modifier, 1-5% of water reducer and 15-35% of aggregate;
the preparation method specifically comprises the following steps:
s1, stirring and mixing: weighing and stirring the proportioning raw materials uniformly, wherein the water content of the proportioning raw materials is controlled to be 13-17%;
s2, primary powder mixing: crushing large particles in the stirred proportioning raw materials;
s3, digestion and aging: feeding the proportioned raw materials after primary powder mixing into a digestion bin for digestion and aging for 1-2 h;
s4, mixing the secondary powder: crushing a cementing material generated by the reaction of the digested and aged carbide slag and the fly ash;
s5, press forming: filling a divided material comprising certain moisture and grading into a cavity which has a preset shape and contains a solvent, and obtaining a formed green brick by applying certain pressure to enable the divided material to have a fixed shape, wherein the preforming pressure is controlled to be 110-120 bar, and the pressure of a press is controlled to be 115-145 bar;
s6, steam pressure curing: and (3) feeding the green bricks subjected to compression molding into an autoclave, and carrying out constant pressure on the green bricks for 3-9 hours at the temperature of 150-180 ℃ by using 0.8-1.2 Mpa steam.
Preferably, the preparation method further comprises:
s7, finished product inspection: and (4) carrying out quality detection on the finished autoclaved brick produced after autoclaved curing, wherein the quality detection comprises the qualification rate, the appearance, the flexural strength and the compressive strength of the finished product.
Preferably, the phosphogypsum is subjected to low-pressure steam curing of 0.8-1.1 Mpa and constant-temperature steam curing of 110-130 ℃ for 12-18 h, and then is mixed with other raw materials.
Preferably, the waste material generated by pressing and forming in S5 is recycled and re-enters the S3 digestion and degradation step.
Preferably, the finished steam-pressed brick in S7 is tested to be qualified, packaged and delivered, and unqualified waste products are crushed to prepare sand and then recycled as proportioning raw materials to be weighed.
Preferably, the modifier comprises CaO, AL2O3, SiO2, and Fe2O 3.
Preferably, the modifier contains Al2O3 and SiO2 in a total mass percentage of 60-70%; the mass percentage content of the Fe2O3 is 2-5%; the mass percent content of CaO is 25-38%; the water content is 13-16%.
Preferably, the waste slag concrete brick is prepared by the preparation method of the waste slag concrete brick according to any one of claims 1 to 7.
(III) advantageous effects
The invention provides a waste residue concrete brick and a preparation method thereof. Compared with the prior art, the method has the following beneficial effects:
the waste residue concrete brick provided by the invention comprises the following raw materials in percentage by weight: 10 to 30 percent of carbide slag, 7 to 20 percent of fly ash, 20 to 40 percent of phosphogypsum, 5 to 15 percent of modifier, 1 to 5 percent of water reducer and 15 to 35 percent of aggregate; the autoclaved brick is prepared by stirring and mixing, primary powder mixing, digestion and aging, secondary powder mixing, press forming and autoclaved curing, the finished autoclaved brick has a smooth appearance, the flexural strength and the compressive strength meet the use requirements, and the finished product qualification rate is high; the utilization rate of the solid waste can be effectively improved, the harm to the environment is reduced, the comprehensive utilization concept of the waste in the national medium-long scientific and technological development planning compendium is met, the requirement of the country on environmental protection is met, and energy conservation, emission reduction and waste recycling are realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for preparing a waste concrete brick according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of another method for preparing a waste concrete brick according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the application provides the waste residue concrete brick and the preparation method thereof, and solves the technical problems of large energy consumption and environmental pollution of the traditional solid clay brick.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
the waste residue concrete brick provided by the embodiment of the invention comprises the following raw materials in percentage by weight: 10 to 30 percent of carbide slag, 7 to 20 percent of fly ash, 20 to 40 percent of phosphogypsum, 5 to 15 percent of modifier, 1 to 5 percent of water reducer and 15 to 35 percent of aggregate; the autoclaved brick is prepared by stirring and mixing, primary powder mixing, digestion and aging, secondary powder mixing, press forming and autoclaved curing, the finished autoclaved brick has a smooth appearance, the flexural strength and the compressive strength meet the use requirements, and the finished product qualification rate is high; the utilization rate of the solid waste can be effectively improved, the harm to the environment is reduced, the comprehensive utilization concept of the waste in the national medium-long scientific and technological development planning compendium is met, the requirement of the country on environmental protection is met, and energy conservation, emission reduction and waste recycling are realized.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
As shown in fig. 1 to 2, an embodiment of the present invention provides a method for preparing a waste concrete brick, wherein the waste concrete brick contains solid waste components. Specifically, the waste slag concrete brick comprises the following raw materials in percentage by weight: 10-30% of carbide slag, 7-20% of fly ash, 20-40% of phosphogypsum, 5-15% of modifier, 1-5% of water reducer and 15-35% of aggregate;
as shown in fig. 1, the preparation method specifically includes:
s1, stirring and mixing: weighing and stirring the proportioning raw materials uniformly, wherein the water content of the proportioning raw materials is controlled to be 13-17%;
s2, primary powder mixing: crushing large particles in the stirred proportioning raw materials, increasing the specific surface area of the proportioning raw materials, facilitating full contact between the proportioning raw materials and ensuring that the reaction between the raw materials is more thorough in the later period;
s3, digestion and aging: the proportioned raw materials after primary powder mixing enter a digestion bin to be digested and aged for 1-2 hours, so that residual calcium oxide in carbide slag is fully reacted, the cracking phenomenon of a steam-cured product in the later period is avoided, and the proportioned materials after aging are uniform in moisture and beneficial to stable pressing of a brick machine;
s4, mixing the secondary powder: crushing a cementing material generated by reacting the digested and aged carbide slag and the fly ash by using a powder mixer, so that the material distribution of a brick machine is facilitated, and the continuous and stable operation of the brick machine is ensured;
s5, press forming: filling a divided material comprising certain moisture and grading into a cavity with a preset shape and containing a solvent by using a brick machine, and applying certain pressure to enable the divided material to have a fixed shape to obtain a formed brick blank, wherein the preforming pressure is controlled to be 110-120 bar, and the pressure of a press is controlled to be 115-145 bar; stacking the formed green bricks on an autoclaved trolley;
s6, steam pressure curing: and (3) conveying the press-formed green bricks into an autoclave through a trolley for autoclave curing, and performing constant pressure maintenance on the green bricks for 3-9 hours at 150-180 ℃ through 0.8-1.2 Mpa steam.
S7, finished product inspection: and (4) carrying out quality detection on the finished autoclaved brick produced after autoclaved curing, wherein the quality detection comprises appearance quality inspection, flexural strength, compressive strength and finished product qualification rate.
Particularly, the phosphogypsum is subjected to pretreatment of 0.8-1.1 Mpa low-pressure steam curing and 110-130 ℃ constant-temperature steam curing for 12-18 h, and then is mixed with other raw materials.
As shown in FIG. 2, the waste material produced by the press molding in S5 is recycled and re-enters the digestion and aging step of S3.
As shown in figure 2, the finished steam-pressed brick in S7 is tested to be qualified, packaged and delivered, and unqualified waste products are crushed to be made into sand and then recycled as proportioning raw materials to be measured and weighed.
The modifier comprises CaO, AL2O3, SiO2 and Fe2O 3.
Specifically, the modifier contains Al2O3 and SiO2 in a mass percentage of 60-70% in total; the mass percentage content of the Fe2O3 is 2-5%; the mass percent content of CaO is 25-38%; the water content is 13-16%.
Example 1:
a preparation method of a waste slag concrete brick is shown in Table 1, and the waste slag concrete brick comprises the following raw materials in percentage by weight: 30% of carbide slag, 20% of fly ash, 20% of phosphogypsum, 5% of modifier, 5% of water reducer and 20% of aggregate.
The preparation method specifically comprises the following steps:
the preparation method specifically comprises the following steps:
s1, stirring and mixing: weighing and stirring the proportioning raw materials uniformly, wherein the water content of the proportioning raw materials is controlled to be 13%;
s2, primary powder mixing: crushing large particles in the stirred proportioning raw materials, increasing the specific surface area of the proportioning raw materials, facilitating full contact between the proportioning raw materials and ensuring that the reaction between the raw materials is more thorough in the later period;
s3, digestion and aging: the proportioned raw materials after primary powder mixing enter a digestion bin to be digested and aged for 2 hours, so that the residual calcium oxide in the carbide slag is fully reacted, the cracking phenomenon of a later steam-cured product is avoided, and the proportioned raw materials after aging are uniform in moisture and beneficial to stable pressing of a brick machine;
s4, mixing the secondary powder: crushing a cementing material generated by reacting the digested and aged carbide slag and the fly ash by using a powder mixer, so that the material distribution of a brick machine is facilitated, and the continuous and stable operation of the brick machine is ensured;
s5, press forming: filling a divided material comprising certain moisture and grading into a cavity with a preset shape and containing a solvent by using a brick machine, and applying certain pressure to enable the divided material to have a fixed shape to obtain a formed brick blank, wherein the preforming pressure is controlled to be 110-120 bar, and the pressure of a press is controlled to be 115-145 bar; stacking the formed green bricks on an autoclaved trolley;
s6, steam pressure curing: and (3) conveying the press-formed green bricks into an autoclave through a trolley for autoclave curing, and performing constant pressure maintenance on the green bricks for 3 hours at 150 ℃ through 0.8Mpa steam.
S7, finished product inspection: and (5) carrying out quality detection on the finished autoclaved brick produced after autoclaved curing. The quality detection comprises appearance quality inspection, breaking strength, compression strength and finished product qualification rate.
Particularly, the phosphogypsum is subjected to pretreatment of 0.8Mpa low-pressure steam curing and 110 ℃ constant-temperature steam curing for 12 hours and then is mixed with other raw materials.
The waste material generated by the pressing and forming in the S5 is recycled and re-enters the S3 digestion and degradation step.
And (3) packaging qualified products of the steam-pressed bricks in the S7, and delivering the qualified products, and recovering unqualified waste products after crushing and sand making as proportioning raw materials for metering and weighing.
The modifier comprises CaO, AL2O3, SiO2 and Fe2O 3.
Specifically, the modifier contains Al2O3 and SiO2 in a mass percentage of 60 percent in total; the mass percent content of Fe2O3 is 2%; the mass percent content of CaO is 38%; the water content was 13%.
The quality detection in the step S7 specifically refers to GB/T2542-2012 brick laying wall experiment method. For example, the flatness of the appearance of the finished autoclaved brick is measured by a bending amount method; the finished steam-pressed brick is soaked in water at the temperature of 20 +/-5 ℃ for 24 hours, then taken out, and the moisture on the surface of the brick is wiped off by wet cloth to carry out a flexural strength test and the like, and finally the qualification rate of the finished steam-pressed brick is counted.
Finally, as shown in Table 2, the yield of the finished autoclaved brick prepared in this example is 95.66%, the appearance is good, the flexural strength is 4.3MPa, and the compressive strength is 23.6 MPa.
Example 2:
a preparation method of a waste slag concrete brick is shown in Table 1, and the waste slag concrete brick comprises the following raw materials in percentage by weight: 25% of carbide slag, 18% of fly ash, 22% of phosphogypsum, 15% of modifier, 5% of water reducer and 15% of aggregate.
The preparation method specifically comprises the following steps:
the preparation method specifically comprises the following steps:
s1, stirring and mixing: weighing and stirring the proportioning raw materials uniformly, wherein the water content of the proportioning raw materials is controlled to be 15%;
s2, primary powder mixing: crushing large particles in the stirred proportioning raw materials, increasing the specific surface area of the proportioning raw materials, facilitating full contact between the proportioning raw materials and ensuring that the reaction between the raw materials is more thorough in the later period;
s3, digestion and aging: the proportioned raw materials after primary powder mixing enter a digestion bin to be digested and aged for 1h, so that the residual calcium oxide in the carbide slag is fully reacted, the cracking phenomenon of a later steam-cured product is avoided, and the proportioned raw materials after aging are uniform in moisture and beneficial to stable pressing of a brick machine;
s4, mixing the secondary powder: crushing a cementing material generated by reacting the digested and aged carbide slag and the fly ash by using a powder mixer, so that the material distribution of a brick machine is facilitated, and the continuous and stable operation of the brick machine is ensured;
s5, press forming: filling a divided material comprising certain moisture and grading into a cavity with a preset shape and containing a solvent by using a brick machine, and applying certain pressure to enable the divided material to have a fixed shape to obtain a formed brick blank, wherein the preforming pressure is controlled to be 110-120 bar, and the pressure of a press is controlled to be 115-145 bar; stacking the formed green bricks on an autoclaved trolley;
s6, steam pressure curing: and (3) conveying the press-formed green bricks into an autoclave through a trolley for autoclave curing, and performing constant pressure 6 hours at 165 ℃ through 1.0Mpa steam.
S7, finished product inspection: and (5) carrying out quality detection on the finished autoclaved brick produced after autoclaved curing. The quality detection comprises appearance quality inspection, breaking strength, compression strength and finished product qualification rate.
Particularly, the phosphogypsum is subjected to pretreatment of 0.9Mpa low-pressure steam curing and 115 ℃ constant-temperature steam curing for 14 hours and then is mixed with other raw materials.
The waste material generated by the pressing and forming in the S5 is recycled and re-enters the S3 digestion and degradation step.
And (3) packaging qualified products of the steam-pressed bricks in the S7, and delivering the qualified products, and recovering unqualified waste products after crushing and sand making as proportioning raw materials for metering and weighing.
The modifier comprises CaO, AL2O3, SiO2 and Fe2O 3.
Specifically, the mass percentage content of Al2O3 and SiO2 in the modifier is 70 percent in total; the mass percent content of Fe2O3 is 5%; the mass percent content of CaO is 25%; the water content was 16%.
The quality detection in the step S7 specifically refers to GB/T2542-2012 brick laying wall experiment method. For example, the flatness of the appearance of the finished autoclaved brick is measured by a bending amount method; the finished steam-pressed brick is soaked in water at the temperature of 20 +/-5 ℃ for 24 hours, then taken out, and the moisture on the surface of the brick is wiped off by wet cloth to carry out a flexural strength test and the like, and finally the qualification rate of the finished steam-pressed brick is counted.
Finally, as shown in Table 2, the yield of the finished autoclaved brick prepared in this example is 96.35%, the appearance is good, the flexural strength is 4.6MPa, and the compressive strength is 24.5 MPa.
Example 3:
a preparation method of a waste slag concrete brick is shown in Table 1, and the waste slag concrete brick comprises the following raw materials in percentage by weight: 10% of carbide slag, 10% of fly ash, 40% of phosphogypsum, 7% of modifier, 1% of water reducer and 32% of aggregate.
The preparation method specifically comprises the following steps:
the preparation method specifically comprises the following steps:
s1, stirring and mixing: weighing and stirring the proportioning raw materials uniformly, wherein the water content of the proportioning raw materials is controlled to be 17%;
s2, primary powder mixing: crushing large particles in the stirred proportioning raw materials, increasing the specific surface area of the proportioning raw materials, facilitating full contact between the proportioning raw materials and ensuring that the reaction between the raw materials is more thorough in the later period;
s3, digestion and aging: the proportioned raw materials after primary powder mixing enter a digestion bin to be digested and aged for 1.5h, so that residual calcium oxide in carbide slag is fully reacted, the cracking phenomenon of a steam-cured product in the later period is avoided, and the proportioned materials after aging are uniform in moisture and beneficial to stable pressing of a brick machine;
s4, mixing the secondary powder: crushing a cementing material generated by reacting the digested and aged carbide slag and the fly ash by using a powder mixer, so that the material distribution of a brick machine is facilitated, and the continuous and stable operation of the brick machine is ensured;
s5, press forming: filling a divided material comprising certain moisture and grading into a cavity with a preset shape and containing a solvent by using a brick machine, and applying certain pressure to enable the divided material to have a fixed shape to obtain a formed brick blank, wherein the preforming pressure is controlled to be 110-120 bar, and the pressure of a press is controlled to be 115-145 bar; stacking the formed green bricks on an autoclaved trolley;
s6, steam pressure curing: and (3) conveying the press-formed green bricks into an autoclave through a trolley for autoclave curing, and performing constant pressure maintenance on the green bricks for 9 hours at 180 ℃ through 1.2Mpa steam.
S7, finished product inspection: and (5) carrying out quality detection on the finished autoclaved brick produced after autoclaved curing. The quality detection comprises appearance quality inspection, breaking strength, compression strength and finished product qualification rate.
Particularly, the phosphogypsum is subjected to pretreatment of steam curing under the low pressure of 1.1Mpa and steam curing at the constant temperature of 130 ℃ for 18 hours and then is mixed with other raw materials.
The waste material generated by the pressing and forming in the S5 is recycled and re-enters the S3 digestion and degradation step.
And (3) packaging qualified products of the steam-pressed bricks in the S7, and delivering the qualified products, and recovering unqualified waste products after crushing and sand making as proportioning raw materials for metering and weighing.
The modifier comprises CaO, AL2O3, SiO2 and Fe2O 3.
Specifically, the modifier contains Al2O3 and SiO2 in a mass percentage of 60 percent in total; the mass percent content of Fe2O3 is 2%; the mass percent content of CaO is 38%; the water content was 13%.
The quality detection in the step S7 specifically refers to GB/T2542-2012 brick laying wall experiment method. For example, the flatness of the appearance of the finished autoclaved brick is measured by a bending amount method; the finished steam-pressed brick is soaked in water at the temperature of 20 +/-5 ℃ for 24 hours, then taken out, and the moisture on the surface of the brick is wiped off by wet cloth to carry out a flexural strength test and the like, and finally the qualification rate of the finished steam-pressed brick is counted.
Finally, as shown in Table 2, the yield of the finished autoclaved brick prepared in this example is 94.38%, the appearance is good, the flexural strength is 4.9MPa, and the compressive strength is 25.6 MPa.
Example 4:
a preparation method of a waste slag concrete brick is shown in Table 1, and the waste slag concrete brick comprises the following raw materials in percentage by weight: 15% of carbide slag, 7% of fly ash, 35% of phosphogypsum, 13% of modifier, 4% of water reducer and 16% of aggregate.
The preparation method specifically comprises the following steps:
the preparation method specifically comprises the following steps:
s1, stirring and mixing: weighing and stirring the proportioning raw materials uniformly, wherein the water content of the proportioning raw materials is controlled to be 13%;
s2, primary powder mixing: crushing large particles in the stirred proportioning raw materials, increasing the specific surface area of the proportioning raw materials, facilitating full contact between the proportioning raw materials and ensuring that the reaction between the raw materials is more thorough in the later period;
s3, digestion and aging: the proportioned raw materials after primary powder mixing enter a digestion bin to be digested and aged for 2 hours, so that the residual calcium oxide in the carbide slag is fully reacted, the cracking phenomenon of a later steam-cured product is avoided, and the proportioned raw materials after aging are uniform in moisture and beneficial to stable pressing of a brick machine;
s4, mixing the secondary powder: crushing a cementing material generated by reacting the digested and aged carbide slag and the fly ash by using a powder mixer, so that the material distribution of a brick machine is facilitated, and the continuous and stable operation of the brick machine is ensured;
s5, press forming: filling a divided material comprising certain moisture and grading into a cavity with a preset shape and containing a solvent by using a brick machine, and applying certain pressure to enable the divided material to have a fixed shape to obtain a formed brick blank, wherein the preforming pressure is controlled to be 110-120 bar, and the pressure of a press is controlled to be 115-145 bar; stacking the formed green bricks on an autoclaved trolley;
s6, steam pressure curing: and (3) conveying the press-formed green bricks into an autoclave through a trolley for autoclave curing, and performing constant pressure maintenance on the green bricks for 3 hours at 150 ℃ through 0.8Mpa steam.
S7, finished product inspection: and (5) carrying out quality detection on the finished autoclaved brick produced after autoclaved curing. The quality detection comprises appearance quality inspection, breaking strength, compression strength and finished product qualification rate.
Particularly, the phosphogypsum is subjected to pretreatment of steam curing under the low pressure of 1Mpa and steam curing at the constant temperature of 125 ℃ for 16 hours and then is mixed with other raw materials.
The waste material generated by the pressing and forming in the S5 is recycled and re-enters the S3 digestion and degradation step.
And (3) packaging qualified products of the steam-pressed bricks in the S7, and delivering the qualified products, and recovering unqualified waste products after crushing and sand making as proportioning raw materials for metering and weighing.
The modifier comprises CaO, AL2O3, SiO2 and Fe2O 3.
Specifically, the mass percentage content of Al2O3 and SiO2 in the modifier is 70 percent in total; the mass percent content of Fe2O3 is 5%; the mass percent content of CaO is 25%; the water content was 16%.
The quality detection in the step S7 specifically refers to GB/T2542-2012 brick laying wall experiment method. For example, the flatness of the appearance of the finished autoclaved brick is measured by a bending amount method; the finished steam-pressed brick is soaked in water at the temperature of 20 +/-5 ℃ for 24 hours, then taken out, and the moisture on the surface of the brick is wiped off by wet cloth to carry out a flexural strength test and the like, and finally the qualification rate of the finished steam-pressed brick is counted.
Finally, as shown in Table 2, the yield of the finished autoclaved brick prepared in this example is 95.08%, the appearance is good, the flexural strength is 4.8MPa, and the compressive strength is 24.4 MPa.
Example 5:
a preparation method of a waste slag concrete brick is shown in Table 1, and the waste slag concrete brick comprises the following raw materials in percentage by weight: 15% of carbide slag, 10% of fly ash, 30% of phosphogypsum, 9% of modifier, 1% of water reducer and 35% of aggregate.
The preparation method specifically comprises the following steps:
the preparation method specifically comprises the following steps:
s1, stirring and mixing: weighing and stirring the proportioning raw materials uniformly, wherein the water content of the proportioning raw materials is controlled to be 15%;
s2, primary powder mixing: crushing large particles in the stirred proportioning raw materials, increasing the specific surface area of the proportioning raw materials, facilitating full contact between the proportioning raw materials and ensuring that the reaction between the raw materials is more thorough in the later period;
s3, digestion and aging: the proportioned raw materials after primary powder mixing enter a digestion bin to be digested and aged for 1h, so that the residual calcium oxide in the carbide slag is fully reacted, the cracking phenomenon of a later steam-cured product is avoided, and the proportioned raw materials after aging are uniform in moisture and beneficial to stable pressing of a brick machine;
s4, mixing the secondary powder: crushing a cementing material generated by reacting the digested and aged carbide slag and the fly ash by using a powder mixer, so that the material distribution of a brick machine is facilitated, and the continuous and stable operation of the brick machine is ensured;
s5, press forming: filling a divided material comprising certain moisture and grading into a cavity with a preset shape and containing a solvent by using a brick machine, and applying certain pressure to enable the divided material to have a fixed shape to obtain a formed brick blank, wherein the preforming pressure is controlled to be 110-120 bar, and the pressure of a press is controlled to be 115-145 bar; stacking the formed green bricks on an autoclaved trolley;
s6, steam pressure curing: and (3) conveying the press-formed green bricks into an autoclave through a trolley for autoclave curing, and performing constant pressure 6 hours at 165 ℃ through 1.0Mpa steam.
S7, finished product inspection: and (5) carrying out quality detection on the finished autoclaved brick produced after autoclaved curing. The quality detection comprises appearance quality inspection, breaking strength, compression strength and finished product qualification rate.
Particularly, the phosphogypsum is subjected to pretreatment of steam curing under the low pressure of 1.1Mpa and steam curing at the constant temperature of 130 ℃ for 17 hours and then is mixed with other raw materials.
The waste material generated by the pressing and forming in the S5 is recycled and re-enters the S3 digestion and degradation step.
And (3) packaging qualified products of the steam-pressed bricks in the S7, and delivering the qualified products, and recovering unqualified waste products after crushing and sand making as proportioning raw materials for metering and weighing.
The modifier comprises CaO, AL2O3, SiO2 and Fe2O 3.
Specifically, the modifier contains Al2O3 and SiO2 in a mass percentage of 60 percent in total; the mass percent content of Fe2O3 is 2%; the mass percent content of CaO is 38%; the water content was 13%.
The quality detection in the step S7 specifically refers to GB/T2542-2012 brick laying wall experiment method. For example, the flatness of the appearance of the finished autoclaved brick is measured by a bending amount method; the finished steam-pressed brick is soaked in water at the temperature of 20 +/-5 ℃ for 24 hours, then taken out, and the moisture on the surface of the brick is wiped off by wet cloth to carry out a flexural strength test and the like, and finally the qualification rate of the finished steam-pressed brick is counted.
Finally, as shown in Table 2, the yield of the finished autoclaved brick prepared in this example is 96.17%, the appearance is good, the flexural strength is 4.3MPa, and the compressive strength is 23.6 MPa.
Example 6:
a preparation method of a waste slag concrete brick is shown in Table 1, and the waste slag concrete brick comprises the following raw materials in percentage by weight: 20% of carbide slag, 13% of fly ash, 30% of phosphogypsum, 10% of modifier, 2% of water reducer and 25% of aggregate.
The preparation method specifically comprises the following steps:
the preparation method specifically comprises the following steps:
s1, stirring and mixing: weighing and stirring the proportioning raw materials uniformly, wherein the water content of the proportioning raw materials is controlled to be 17%;
s2, primary powder mixing: crushing large particles in the stirred proportioning raw materials, increasing the specific surface area of the proportioning raw materials, facilitating full contact between the proportioning raw materials and ensuring that the reaction between the raw materials is more thorough in the later period;
s3, digestion and aging: the proportioned raw materials after primary powder mixing enter a digestion bin to be digested and aged for 1.5h, so that residual calcium oxide in carbide slag is fully reacted, the cracking phenomenon of a steam-cured product in the later period is avoided, and the proportioned materials after aging are uniform in moisture and beneficial to stable pressing of a brick machine;
s4, mixing the secondary powder: crushing a cementing material generated by reacting the digested and aged carbide slag and the fly ash by using a powder mixer, so that the material distribution of a brick machine is facilitated, and the continuous and stable operation of the brick machine is ensured;
s5, press forming: filling a divided material comprising certain moisture and grading into a cavity with a preset shape and containing a solvent by using a brick machine, and applying certain pressure to enable the divided material to have a fixed shape to obtain a formed brick blank, wherein the preforming pressure is controlled to be 110-120 bar, and the pressure of a press is controlled to be 115-145 bar; stacking the formed green bricks on an autoclaved trolley;
s6, steam pressure curing: and (3) conveying the press-formed green bricks into an autoclave through a trolley for autoclave curing, and performing constant pressure maintenance on the green bricks for 9 hours at 180 ℃ through 1.2Mpa steam.
S7, finished product inspection: and (5) carrying out quality detection on the finished autoclaved brick produced after autoclaved curing. The quality detection comprises appearance quality inspection, breaking strength, compression strength and finished product qualification rate.
Particularly, the phosphogypsum is subjected to pretreatment of steam curing under the low pressure of 1Mpa and steam curing at the constant temperature of 120 ℃ for 15 hours and then is mixed with other raw materials.
The waste material generated by the pressing and forming in the S5 is recycled and re-enters the S3 digestion and degradation step.
And (3) packaging qualified products of the steam-pressed bricks in the S7, and delivering the qualified products, and recovering unqualified waste products after crushing and sand making as proportioning raw materials for metering and weighing.
The modifier comprises CaO, AL2O3, SiO2 and Fe2O 3.
Specifically, the mass percentage content of Al2O3 and SiO2 in the modifier is 70 percent in total; the mass percent content of Fe2O3 is 5%; the mass percent content of CaO is 25%; the water content was 16%.
The quality detection in the step S7 specifically refers to GB/T2542-2012 brick laying wall experiment method. For example, the flatness of the appearance of the finished autoclaved brick is measured by a bending amount method; the finished steam-pressed brick is soaked in water at the temperature of 20 +/-5 ℃ for 24 hours, then taken out, and the moisture on the surface of the brick is wiped off by wet cloth to carry out a flexural strength test and the like, and finally the qualification rate of the finished steam-pressed brick is counted.
Finally, as shown in Table 1, the yield of the finished autoclaved brick prepared in this example is 96.28%, the appearance is good, the flexural strength is 4.6MPa, and the compressive strength is 24.2 MPa.
TABLE 1
TABLE 2
As can be seen from tables 1-2, the waste slag concrete brick provided by each embodiment of the invention comprises the following raw materials in percentage by weight: 10 to 30 percent of carbide slag, 7 to 20 percent of fly ash, 20 to 40 percent of phosphogypsum and 5 percent of modifier
15 percent, 1 to 5 percent of water reducing agent and 15 to 35 percent of aggregate; the autoclaved brick is prepared by stirring and mixing, primary powder mixing, digestion and aging, secondary powder mixing, press forming and autoclaved curing, the finished autoclaved brick has a smooth appearance, the flexural strength and the compressive strength meet the use requirements, and the finished product qualification rate is high; the utilization rate of the solid waste can be effectively improved, the harm to the environment is reduced, the comprehensive utilization concept of the waste in the national medium-long scientific and technological development planning compendium is met, the requirement of the country on environmental protection is met, and energy conservation, emission reduction and waste recycling are realized.
In addition, the embodiment of the invention also provides the waste residue concrete brick, which is prepared and obtained by adopting the preparation method of the waste residue concrete brick.
In summary, compared with the prior art, the method has the following beneficial effects:
the waste residue concrete brick provided by the embodiment of the invention comprises the following raw materials in percentage by weight: 10 to 30 percent of carbide slag, 7 to 20 percent of fly ash, 20 to 40 percent of phosphogypsum, 5 to 15 percent of modifier, 1 to 5 percent of water reducer and 15 to 35 percent of aggregate; the autoclaved brick is prepared by stirring and mixing, primary powder mixing, digestion and aging, secondary powder mixing, press forming and autoclaved curing, the finished autoclaved brick has a smooth appearance, the flexural strength and the compressive strength meet the use requirements, and the finished product qualification rate is high; the utilization rate of the solid waste can be effectively improved, the harm to the environment is reduced, the comprehensive utilization concept of the waste in the national medium-long scientific and technological development planning compendium is met, the requirement of the country on environmental protection is met, and energy conservation, emission reduction and waste recycling are realized.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The preparation method of the waste residue concrete brick is characterized in that the waste residue concrete brick comprises the following raw materials in percentage by weight: 10-30% of carbide slag, 7-20% of fly ash, 20-40% of phosphogypsum, 5-15% of modifier, 1-5% of water reducer and 15-35% of aggregate;
the preparation method specifically comprises the following steps:
s1, stirring and mixing: weighing and stirring the proportioning raw materials uniformly, wherein the water content of the proportioning raw materials is controlled to be 13-17%;
s2, primary powder mixing: crushing large particles in the stirred proportioning raw materials;
s3, digestion and aging: feeding the proportioned raw materials after primary powder mixing into a digestion bin for digestion and aging for 1-2 h;
s4, mixing the secondary powder: crushing a cementing material generated by the reaction of the digested and aged carbide slag and the fly ash;
s5, press forming: filling a divided material comprising certain moisture and grading into a cavity which has a preset shape and contains a solvent, and obtaining a formed green brick by applying certain pressure to enable the divided material to have a fixed shape, wherein the preforming pressure is controlled to be 110-120 bar, and the pressure of a press is controlled to be 115-145 bar;
s6, steam pressure curing: and (3) feeding the green bricks subjected to compression molding into an autoclave, and carrying out constant pressure on the green bricks for 3-9 hours at the temperature of 150-180 ℃ by using 0.8-1.2 Mpa steam.
2. The method of making a waste slag concrete brick as claimed in claim 1, further comprising:
s7, finished product inspection: and (4) carrying out quality detection on the finished autoclaved brick produced after autoclaved curing, wherein the quality detection comprises appearance quality inspection, flexural strength, compressive strength and finished product qualification rate.
3. The method for preparing the waste residue concrete brick as claimed in claim 2, wherein the phosphogypsum is mixed with other raw materials after being pretreated by low-pressure steam curing under 0.8-1.1 Mpa and constant-temperature steam curing under 110-130 ℃ for 12-18 h.
4. A method for preparing a waste concrete brick as claimed in any one of claims 1 to 3 wherein the waste material produced in S5 from pressing and forming is recycled and re-introduced into S3 digestion and degradation step.
5. The method for preparing a waste residue concrete brick as claimed in claim 2, wherein the finished autoclaved brick in S7 is tested to be qualified, packaged and delivered, and unqualified waste is crushed to be made into sand and then recycled as proportioning raw materials to be measured and weighed.
6. The method of making a waste slag concrete brick as claimed in claim 2, wherein said modifier comprises CaO, AL2O3, SiO2 and Fe2O 3.
7. The method for preparing the waste residue concrete brick as claimed in claim 6, wherein the modifier comprises Al2O3 and SiO2 in an amount of 60-70% by weight; the mass percentage content of the Fe2O3 is 2-5%; the mass percent content of CaO is 25-38%; the water content is 13-16%.
8. A waste residue concrete brick, which is characterized in that the waste residue concrete brick is prepared by the preparation method of the waste residue concrete brick according to any one of claims 1 to 7.
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