CN116573907A - Ecological cycle brick prepared from construction waste and preparation method thereof - Google Patents
Ecological cycle brick prepared from construction waste and preparation method thereof Download PDFInfo
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- CN116573907A CN116573907A CN202310563188.XA CN202310563188A CN116573907A CN 116573907 A CN116573907 A CN 116573907A CN 202310563188 A CN202310563188 A CN 202310563188A CN 116573907 A CN116573907 A CN 116573907A
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- 239000002699 waste material Substances 0.000 title claims abstract description 86
- 238000010276 construction Methods 0.000 title claims abstract description 72
- 239000011449 brick Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title abstract description 5
- 239000002689 soil Substances 0.000 claims abstract description 32
- 239000010802 sludge Substances 0.000 claims abstract description 26
- 239000004568 cement Substances 0.000 claims abstract description 16
- 239000010881 fly ash Substances 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 239000002910 solid waste Substances 0.000 claims abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 14
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 13
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 13
- 235000011152 sodium sulphate Nutrition 0.000 claims description 13
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 12
- 239000000920 calcium hydroxide Substances 0.000 claims description 12
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 10
- 239000005543 nano-size silicon particle Substances 0.000 claims description 10
- 235000012239 silicon dioxide Nutrition 0.000 claims description 10
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 9
- 239000004567 concrete Substances 0.000 claims description 9
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 9
- 239000004743 Polypropylene Substances 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 7
- 229920001684 low density polyethylene Polymers 0.000 claims description 7
- 239000004702 low-density polyethylene Substances 0.000 claims description 7
- 239000010813 municipal solid waste Substances 0.000 claims description 7
- -1 polypropylene Polymers 0.000 claims description 7
- 229920001155 polypropylene Polymers 0.000 claims description 7
- 239000008187 granular material Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 238000007873 sieving Methods 0.000 claims description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 2
- 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 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 2
- 239000000292 calcium oxide Substances 0.000 claims description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 2
- 229910052731 fluorine Inorganic materials 0.000 claims description 2
- 239000011737 fluorine Substances 0.000 claims description 2
- 229910052602 gypsum Inorganic materials 0.000 claims description 2
- 239000010440 gypsum Substances 0.000 claims description 2
- 239000000395 magnesium oxide Substances 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 229920002401 polyacrylamide Polymers 0.000 claims description 2
- 235000019353 potassium silicate Nutrition 0.000 claims description 2
- 238000012216 screening Methods 0.000 claims description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 2
- 238000004064 recycling Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 32
- 238000010257 thawing Methods 0.000 description 18
- 230000008014 freezing Effects 0.000 description 8
- 238000007710 freezing Methods 0.000 description 8
- 238000009472 formulation Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 239000011456 concrete brick Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000009466 transformation Effects 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
- 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
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The application discloses an ecological circulating brick prepared from construction waste and a preparation method thereof, wherein the ecological circulating brick comprises, by mass, 40-65 parts of construction waste, 15-40 parts of construction waste soil sludge, 7-10 parts of cement, 7-12 parts of fly ash and 1-3 parts of active curing agent, and the ecological circulating brick is used for recycling construction solid waste to realize ecological circulation.
Description
Technical Field
The application relates to an ecological cycle brick prepared from construction waste and a preparation method thereof.
Background
The construction waste refers to residue soil, waste materials, waste soil slurry and other wastes generated in the process of constructing, laying or dismantling various buildings, structures, pipe networks and the like by construction units or individuals. The amount of the building rubbish in China is 30-40% of the total amount of the urban rubbish. However, most of the construction waste is transported to suburbs or villages by construction units without any treatment, and is piled up or buried in open air, so that a large amount of construction expenses such as land fees, garbage cleaning and transporting fees are consumed, and meanwhile, the problems of scattering, dust, ash and sand flying and the like in the process of cleaning and piling up are caused to seriously pollute the environment.
At present, the main treatment method of the construction waste in China is to bury the construction waste underground. The harm is as follows: (1) occupies a large amount of land. (2) Causing serious environmental pollution. (3) The soil structure is destroyed, and the ground surface subsides.
Therefore, the utilization method of the construction waste has certain production and application values.
Disclosure of Invention
The first object of the application is to provide an ecological cycle brick prepared from construction waste, which is used for recycling construction solid waste and realizing ecological cycle.
The technical aim of the application is realized by the following technical scheme:
the ecological circulating brick prepared from the construction waste comprises, by mass, 40-65 parts of the construction waste, 15-40 parts of construction waste soil sludge, 7-10 parts of cement, 7-12 parts of fly ash and 1-3 parts of an active curing agent.
Preferably, the active curing agent comprises calcium hydroxide and sodium sulfate, and the mass ratio of the calcium hydroxide to the sodium sulfate is 3.5-4.5:1.
Preferably, the active curing agent comprises 18 to 30 weight percent of nano silicon dioxide, 5 to 10 weight percent of aluminum sulfate, 45 to 60 weight percent of calcium oxide, 2 to 5 weight percent of polyvinyl alcohol, 0.5 to 1.5 weight percent of water glass, 0.5 to 1.5 weight percent of polyacrylamide, 5 to 10 weight percent of magnesium oxide and 2 to 6 weight percent of fluorine gypsum.
Preferably, the selected construction waste is granular materials after sorting, crushing and screening, the construction waste is materials of brick, tile and concrete solid waste during sorting, and the selected construction waste is class II construction waste regenerated coarse aggregate particles;
the selected building waste soil and sludge is the granular material after sorting, crushing and sieving, the building waste soil and sludge is the material of building waste soil and dried building mud during sorting, and the selected building waste soil and sludge is the type II building rubbish regenerated fine aggregate particles.
Preferably, the concrete comprises 55 parts of construction waste, 30 parts of construction waste soil sludge, 8 parts of cement, 10 parts of fly ash, 1.6 parts of calcium hydroxide and 0.4 part of sodium sulfate in parts by mass.
Preferably, the composite material comprises, by mass, 55 parts of construction waste, 30 parts of construction waste soil sludge, 8 parts of cement, 10 parts of fly ash, 1.6 parts of calcium hydroxide, 0.4 part of sodium sulfate, 1-3 parts of polypropylene fiber, 0.4-0.6 part of nano silicon dioxide, 0.04-0.06 part of polyvinyl alcohol and 0.04-0.06 part of low-density polyethylene.
Preferably, the composite material comprises, by mass, 55 parts of construction waste, 30 parts of construction waste soil sludge, 8 parts of cement, 10 parts of fly ash, 1.6 parts of calcium hydroxide, 0.4 part of sodium sulfate, 2 parts of fine denier polypropylene fiber, 0.5 part of nano silicon dioxide, 0.05 part of polyvinyl alcohol and 0.05 part of low density polyethylene.
The second object of the application is to provide a method for preparing the ecological cycle brick from construction waste.
The technical aim of the application is realized by the following technical scheme:
the method for preparing the ecological cycle brick prepared from the construction waste comprises the following steps: mixing the construction waste, the construction waste soil sludge, the cement, the fly ash and the active curing agent, uniformly stirring, adding water, uniformly stirring, and controlling the water addition amount to be 10-20wt% of the total materials; and (3) conveying the uniformly mixed materials into a die, pressing, compacting and forming, demolding, and placing the demolded brick into a place with the temperature of 20-30 ℃ and the relative humidity of more than 95% RH for standing and maintaining for 7-28 d to obtain an ecological cycle brick product.
Preferably, the method comprises the following steps: adding water into the living fine denier polypropylene fiber, the nano silicon dioxide, the polyvinyl alcohol and the low-density polyethylene, uniformly stirring, adding the uniformly mixed mixture of the construction waste, the construction waste soil sludge, the cement, the fly ash and the active curing agent, uniformly stirring, and controlling the water adding amount to be 10-20wt% of the total materials; and (3) conveying the uniformly mixed materials into a die, pressing, compacting and forming, demolding, and placing the demolded brick into a place with the temperature of 20-30 ℃ and the relative humidity of more than 95% RH for standing and maintaining for 7-28 d to obtain an ecological cycle brick product.
The technical effects of the application are mainly as follows:
1. the application is characterized in that active silicon and other oxides in raw materials are subjected to a reaction process of re-recombination after molecular bonds of recycled aggregate and soil are broken under the action of alkaline materials, namely a depolymerization and polycondensation theory, and a cured object is wrapped to form a film structure (space network structure) by the molecules so as to achieve the purpose of modification, so that better strength and durability are obtained. The construction waste soil and sludge cannot be fused into a stable structure, and the problem of mechanical damage exists;
2. in the prior art, the recycled aggregate forms microcracks in the recycled aggregate during the crushing and aggregate preparation processes of waste concrete, so that the damage to different degrees is caused in the recycled aggregate.
Detailed Description
Preparing raw materials: the selected construction waste is granular material after sorting, crushing and sieving, the construction waste is material of brick, tile and concrete solid waste during sorting, and the selected construction waste is class II construction waste regenerated coarse aggregate particles. Reference is made to the standard in GB/T25177 recycled coarse aggregate for concrete.
The selected building waste soil and sludge is the granular material after sorting, crushing and sieving, the building waste soil and sludge is the material of building waste soil and dried building mud during sorting, and the selected building waste soil and sludge is the type II building rubbish regenerated fine aggregate particles. Reference is made to the standard in GB/T25176 recycled fine aggregate for concrete and mortar. Generally, the building rubbish and the building waste soil sludge have water content of 20-30%, and are dried until the water content is lower than 10wt% and then put into the application for use.
The cement used in examples 1-10 was grade 42.5 Portland cement.
The selected fly ash is the main solid waste discharged from the coal-fired power plant.
Examples 1 to 5: an ecological cycle brick prepared from construction waste is prepared by the following method:
uniformly adding calcium hydroxide and sodium sulfate into a uniformly mixed mixture of building waste, building waste soil sludge, cement and fly ash, uniformly stirring, adding water, uniformly stirring, and controlling the water addition amount to be 10wt% of the total material; and (3) conveying the uniformly mixed materials into a die, pressing, compacting and forming, demolding, and placing the demolded brick into a place with the temperature of 20-30 ℃ and the relative humidity of more than 95% RH for standing and maintaining for 28d to obtain an ecological cycle brick product.
The formulation information for examples 1-5 is shown in Table 1.
Table 1 examples 1-5 formulation information (unit: parts by mass)
Examples 6 to 10: an ecological cycle brick prepared from construction waste is prepared by the following method:
adding water into polypropylene fiber, nano silicon dioxide, polyvinyl alcohol and low-density polyethylene, uniformly stirring, adding a uniformly mixed mixture of construction waste, construction waste soil sludge, cement, fly ash, calcium hydroxide and sodium sulfate, uniformly stirring, and controlling the water adding amount to be 10wt% of the total material; and (3) conveying the uniformly mixed materials into a die, pressing, compacting and forming, demolding, and placing the demolded brick into a place with the temperature of 20-30 ℃ and the relative humidity of more than 95% RH for standing and maintaining for 28d to obtain an ecological cycle brick product.
The formulation information for examples 6-10 is shown in Table 2.
Table 2 examples 6-10 formulation information (Unit: parts by weight)
Example 11: an ecological cycle tile prepared from construction waste is different from example 6 in that nano calcium carbonate is used instead of nano silicon dioxide.
Examples 12 to 14: an ecological cycle brick prepared from construction waste is different from example 6 in that the formulation of the active curing agent is shown in table 3.
TABLE 3 information on formulations of reactive curing agents of examples 12-14
Performance testing
1. Basic Performance test
Referring to test subjects of GB/T21144-2007 solid concrete brick, the specification of the test subjects is 240mm multiplied by 115mm multiplied by 53mm, 3 batches are tested in parallel for each test subject, 3 samples are randomly taken for each batch to be tested, and the average value of the samples is taken as test data, and the test contents are shown in Table 4.
Table 4 shows that the strength grade, maximum water absorption, drying shrinkage and relative water content of examples 1-3 and 6 all meet the standard requirements, and the test subjects can be used in the corresponding working environments to realize recycling of the construction waste.
TABLE 4 Table 4
And testing the test object by referring to GB/T21144-2007/annex B, C, and calculating the carbonization coefficient and the softening coefficient of the test object, wherein the carbonization coefficient of the test object is more than or equal to 0.80, and the softening coefficient of the test object is more than or equal to 0.80, which all meet the standard requirements.
2. Quick freeze thawing test
The test adopts a quick freezing and thawing method, which is short for quick freezing and thawing method and is suitable for measuring the freezing and thawing performance of the concrete sample under the condition that freezing and thawing occur in water. The test subjects were 240mm by 115mm by 53mm, 3 batches were tested in parallel for each test subject, 3 samples were randomly taken for each batch, and the average value of the samples was taken as test data, and the test contents are shown in table 5.
And (3) taking a test object immediately after demolding, placing the test piece into a curing box for curing, wherein the temperature is set to be 20+/-2 ℃, and the relative humidity is always kept above 95%. After the test piece is cured for 23 days, the test piece is soaked in water at the temperature of (20+/-2) ℃ for 4 days, so that the interior of the test piece is filled with water, and the water surface is 2 cm-3 cm beyond the upper surface of the test piece in the soaking process. After 28 days of age, wiping the surface of the test piece, removing surface moisture, measuring the quality, numbering, recording data, and performing a freeze-thawing cycle test.
The freeze thawing cycle test conditions are strictly required according to the standard of the test method for the long-term performance and the durability of common concrete, and the freeze thawing cycle of the first few times is tested and observed. The primary freeze thawing cycle time is about 157 minutes, the thawing time is about 35 minutes, and is more than one fourth of the total cycle time; the freezing time is about 102 minutes, wherein the time from 3 ℃ to-16 ℃ is about 51 minutes, which is just half of the total freezing time, and the time from-16 ℃ to 3 ℃ is about 24 minutes, which is greater than half of the thawing time; the maximum temperature difference between the inside and the outside of the time is about 18.2 ℃ which is less than the upper limit of 28 ℃ of the specification, and the freezing and thawing conversion time is 10 minutes, thereby meeting the specification requirements.
The test results are shown in Table 5. Table 5 shows that examples 1, 6, 9-12 have small mass loss and compressive strength loss after freeze thawing for 25 times, meet the standard requirements, and examples 6 and 12 are optimal in that they can maintain better mass and compressive strength after freeze thawing for more times, and are suitable for more severe environments.
TABLE 5
3. Corrosion freeze thawing test
The aqueous medium in test 2 was modified to a sodium sulfate, sodium chloride, magnesium chloride complex salt mixed corrosion solution (prepared as a mixed solution with a concentration of 10% in a ratio of 1:1:1), and a similar test was performed.
The test results are shown in Table 6. Table 6 shows that examples 6 and 12 maintain better quality and compressive strength after more times of corrosion freeze thawing, and are suitable for more severe environments.
TABLE 6
| Detecting items | Example 1 | Example 6 | Example 9 | Example 10 | Example 11 | Example 12 |
| Mass loss after 25 times of freeze thawing,% | 12.2 | 1.5 | 11.7 | 12.3 | 10.1 | 2.1 |
| Compression strength loss after 25 times of freezing and thawing,% | 57 | 17 | 54 | 58 | 47 | 30 |
Of course, the above is only a typical example of the application, and other embodiments of the application are also possible, and all technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of the application claimed.
Claims (9)
1. The ecological circulating brick prepared from the construction waste is characterized by comprising, by mass, 40-65 parts of the construction waste, 15-40 parts of construction waste soil sludge, 7-10 parts of cement, 7-12 parts of fly ash and 1-3 parts of an active curing agent.
2. The ecological cycle brick prepared from construction waste according to claim 1, wherein the active curing agent comprises calcium hydroxide and sodium sulfate, and the mass ratio of the calcium hydroxide to the sodium sulfate is 3.5-4.5:1.
3. The ecological cycle brick prepared from construction waste according to claim 1, wherein the active curing agent comprises 18-30wt% of nano silicon dioxide, 5-10wt% of aluminum sulfate, 45-60wt% of calcium oxide, 2-5wt% of polyvinyl alcohol, 0.5-1.5wt% of water glass, 0.5-1.5wt% of polyacrylamide, 5-10wt% of magnesium oxide and 2-6wt% of fluorine gypsum.
4. The ecological cycle brick prepared from construction waste according to claim 2, wherein the selected construction waste is granular materials after sorting, crushing and screening, the construction waste is materials of brick and tile and concrete solid waste during sorting, and the selected construction waste is class II construction waste regenerated coarse aggregate particles;
the selected building waste soil and sludge is the granular material after sorting, crushing and sieving, the building waste soil and sludge is the material of building waste soil and dried building mud during sorting, and the selected building waste soil and sludge is the type II building rubbish regenerated fine aggregate particles.
5. The ecological cycle brick prepared from construction waste according to claim 4, which comprises, by mass, 55 parts of construction waste, 30 parts of construction waste soil sludge, 8 parts of cement, 10 parts of fly ash, 1.6 parts of calcium hydroxide and 0.4 part of sodium sulfate.
6. The ecological cycle brick prepared from construction waste according to claim 5, which is characterized by comprising, by mass, 55 parts of construction waste, 30 parts of construction waste soil sludge, 8 parts of cement, 10 parts of fly ash, 1.6 parts of calcium hydroxide, 0.4 part of sodium sulfate, 1 to 3 parts of polypropylene fiber, 0.4 to 0.6 part of nano silicon dioxide, 0.04 to 0.06 part of polyvinyl alcohol and 0.04 to 0.06 part of low density polyethylene.
7. The ecological cycle brick prepared from construction waste according to claim 6, which comprises, by mass, 55 parts of construction waste, 30 parts of construction waste sludge, 8 parts of cement, 10 parts of fly ash, 1.6 parts of calcium hydroxide, 0.4 part of sodium sulfate, 2 parts of fine denier polypropylene fiber, 0.5 part of nano silicon dioxide, 0.05 part of polyvinyl alcohol and 0.05 part of low density polyethylene.
8. A method for preparing an ecological cycle tile prepared from construction waste according to any one of claims 1 to 7, comprising the steps of: mixing the construction waste, the construction waste soil sludge, the cement, the fly ash and the active curing agent, uniformly stirring, adding water, uniformly stirring, and controlling the water addition amount to be 10-20wt% of the total materials; and (3) conveying the uniformly mixed materials into a die, pressing, compacting and forming, demolding, and placing the demolded brick into a place with the temperature of 20-30 ℃ and the relative humidity of more than 95% RH for standing and maintaining for 7-28 d to obtain an ecological cycle brick product.
9. The method of preparing as claimed in claim 8, comprising the steps of: adding water into the fine denier polypropylene fiber, the nano silicon dioxide, the polyvinyl alcohol and the low-density polyethylene, uniformly stirring, adding the uniformly mixed mixture of the construction waste, the construction waste soil sludge, the cement, the fly ash and the active curing agent, uniformly stirring, and controlling the water adding amount to be 10-20wt% of the total materials; and (3) conveying the uniformly mixed materials into a die, pressing, compacting and forming, demolding, and placing the demolded brick into a place with the temperature of 20-30 ℃ and the relative humidity of more than 95% RH for standing and maintaining for 7-28 d to obtain an ecological cycle brick product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310563188.XA CN116573907A (en) | 2023-05-18 | 2023-05-18 | Ecological cycle brick prepared from construction waste and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310563188.XA CN116573907A (en) | 2023-05-18 | 2023-05-18 | Ecological cycle brick prepared from construction waste and preparation method thereof |
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| CN116573907A true CN116573907A (en) | 2023-08-11 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913831A (en) * | 2010-07-20 | 2010-12-15 | 昆明理工大学 | Method for producing baking-free bricks by solidifying construction wastes by utilizing phosphogypsum |
| CN111348883A (en) * | 2020-03-13 | 2020-06-30 | 重庆中科建设（集团）有限公司 | Autoclaved aerated concrete with high crack resistance and low water absorption rate and preparation method thereof |
| CN113307596A (en) * | 2021-06-28 | 2021-08-27 | 西南石油大学 | Method for preparing baking-free brick from offshore drilling waste mud |
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2023
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