CN111848032A - Adhesive based on construction waste and preparation method thereof - Google Patents
Adhesive based on construction waste and preparation method thereof Download PDFInfo
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- CN111848032A CN111848032A CN202010679098.3A CN202010679098A CN111848032A CN 111848032 A CN111848032 A CN 111848032A CN 202010679098 A CN202010679098 A CN 202010679098A CN 111848032 A CN111848032 A CN 111848032A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—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
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/04—Heat treatment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00637—Uses not provided for elsewhere in C04B2111/00 as glue or binder for uniting building or structural materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a construction waste-based adhesive and a preparation method thereof, wherein the construction waste-based adhesive comprises the following raw materials: ordinary portland cement, modified construction waste, fly ash, standard sand, sodium hexafluoroaluminate, diafenthiuron, sodium carboxymethylcellulose and water; the modified construction waste is prepared by the following method: s1, crushing and grinding the construction waste to obtain construction waste powder; s2, calcining the construction waste powder, adding bentonite, uniformly mixing, heating, continuously mixing for 30min, and cooling to room temperature to obtain modified construction waste; the preparation method of the construction waste-based adhesive comprises the following steps: A. preparing raw materials; B. preparing a mixture; C. the mixing of other raw materials can obtain the adhesive based on the construction waste. The adhesive based on the construction waste provided by the invention has the advantages of small cement consumption, good compressive strength and flexural strength, and effective inhibition of cement ash in the preparation process.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a building garbage-based adhesive and a preparation method thereof.
Background
An adhesive is a substance having the property of being sticky by which one can join two separate materials together. The adhesive is one of the most important auxiliary materials in the field of construction, in particular to a cement-based adhesive used in the construction process of buildings and coated on the surface of building materials such as steel, bricks and the like, which can form a stable structural layer on the surface of the steel and bond the bricks so as to strengthen the stability of the brick structure. In this field, the currently used binders are mainly cement-based binders, and the proportion of cement in the binder can reach 50% or even more. With the rising of more and more high buildings, the demand of adhesives in the construction field is increasing. Because the existing adhesive commonly used in the construction field is still a cement-based adhesive, and the proportion of cement in the cement-based adhesive is large, the demand of cement is increasing, which causes great pressure on cement generating enterprises. And the cement is disadvantageous to the health of operators because more dust is generated in the process of preparing the binder. In addition, the higher the content of cement in the cement-based binder, the greater the bond strength, but this increases the difficulty of preparing the binder and increases the production cost.
The original building can be dismantled before the building is built, a large amount of building waste can be generated in the dismantling process, the environment can be harmed if the building waste is not utilized, and meanwhile, the waste of resources is also caused. Based on the above, the invention provides an adhesive based on construction waste and a preparation method thereof.
Disclosure of Invention
The invention aims to solve the problems that the existing cement-based adhesive for buildings has large specific gravity, cement production enterprises have large pressure, and are unfavorable for the health of operators, the overall cost is increased due to the increase of the strength of the cement-based adhesive, and a large amount of building waste is generated in the building construction process and is unfavorable for the environment.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the adhesive based on the construction waste comprises the following raw materials in parts by weight: 200-230 parts of ordinary portland cement, 250-280 parts of modified building waste, 20-30 parts of fly ash, 1000-1200 parts of standard sand, 0.2-0.6 part of sodium hexafluoroaluminate, 1.4-2.4 parts of diafenthiuron, 1.1-2.2 parts of sodium carboxymethylcellulose and 200-230 parts of water;
The modified construction waste is prepared by the following method:
s1, crushing and grinding the construction waste, wherein the screen residue of a screen with the grinding particle size of 0.03mm is less than 5 percent, and the construction waste powder is obtained;
s2, placing the construction waste powder obtained in the step S1 into a furnace for program calcination, adding bentonite with the mass being 5% -8% of that of the construction waste powder after the program calcination, uniformly mixing, heating to 350-360 ℃, continuously mixing for 30min, and cooling to room temperature to obtain the modified construction waste.
Preferably, the construction waste-based adhesive comprises the following raw materials in parts by weight: 210 parts of ordinary portland cement, 260 parts of modified construction waste, 25 parts of fly ash, 1100 parts of standard sand, 0.4 part of sodium hexafluoroaluminate, 2 parts of diafenthiuron, 1.6 parts of sodium carboxymethylcellulose and 210 parts of water.
Preferably, in step S2, the procedure of the procedure calcination is: and (3) heating to 800 ℃ within 30min, heating at the speed of 20 ℃/min for 0-10 min after the temperature is increased to 800 ℃, heating to 1200 ℃ at the speed of 10 ℃/min after 10min, keeping for 60min, cooling to 900 ℃ at the speed of 10 ℃/min, keeping for 30min, cooling to 300 ℃ at the speed of 20 ℃/min, and finishing the procedure calcination.
Preferably, the mass ratio of the sodium hexafluoroaluminate to the diafenthiuron is 1: 4-7, and further preferably, the mass ratio of sodium hexafluoroaluminate to diafenthiuron is 1: 5.
The invention also provides a preparation method of the adhesive based on the construction waste, which is characterized by comprising the following steps:
A. weighing the raw materials according to 200-230 parts of ordinary portland cement, 250-280 parts of modified building waste, 20-30 parts of fly ash, 1000-1200 parts of standard sand, 0.2-0.6 part of sodium hexafluoroaluminate, 1.4-2.4 parts of diafenthiuron, 1.1-2.2 parts of sodium carboxymethylcellulose and 200-230 parts of water for later use;
B. taking a proper volume from the water prepared in the step A, heating to 40-46 ℃, adding the sodium hexafluoroaluminate and the diafenthiuron weighed in the step A, stirring and mixing for 15-25 min, adding the modified construction waste weighed in the step A and the balance of water while the mixture is hot, continuing stirring and mixing for 30-40 min, and cooling to room temperature to obtain a mixture;
C. and D, sequentially adding the sodium carboxymethyl cellulose, the ordinary portland cement, the fly ash and the standard sand weighed in the step A into the mixture obtained in the step B, and continuously stirring and mixing until the mixture is uniform to obtain the building garbage-based adhesive.
Preferably, the stirring speed during stirring and mixing is 300-400 r/min.
Compared with the prior art, the adhesive provided by the invention has the advantages that:
1. the adhesive provided by the invention takes cheap and easily available ordinary portland cement as a main adhesive, utilizes modified ordinary building waste in the building field as an auxiliary material, solves the problem of difficult treatment of the building waste in the building field, reduces the using amount of the ordinary portland cement in the adhesive, reduces the adverse effect of the cement on the health of operators, and adds fly ash, standard sand, sodium hexafluoroaluminate, diafenthiuron and sodium carboxymethyl cellulose into the adhesive to ensure that the adhesive provided by the invention has the characteristic of high strength under the condition of using less cement, can inhibit the dispersion degree of cement ash in the preparation process of the adhesive, is particularly suitable for replacing the cement-based adhesive used in the existing building field, effectively solves the problems that the specific gravity of the cement in the existing cement-based adhesive for building is higher, and the pressure of cement production enterprises is higher, the cement-based adhesive is unfavorable to the health of operators, the overall cost is increased due to the increase of the strength of the cement-based adhesive, and a large amount of construction waste is generated in the construction process of the building, which is an unfavorable problem to the environment.
2. Experiments prove that the proportion relation of the sodium hexafluoroaluminate and the diafenthiuron in the invention is within a certain range, so that the adhesive provided by the invention has higher strength, and particularly, the mass ratio of the sodium hexafluoroaluminate to the diafenthiuron is 1: at 5, the strength of the resulting adhesive is highest.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
Example 1
The invention provides a construction waste-based adhesive which comprises the following raw materials in parts by weight: 200 parts of ordinary portland cement, 250 parts of modified building garbage, 20 parts of fly ash, 1000 parts of standard sand, 0.2 part of sodium hexafluoroaluminate, 1.4 parts of diafenthiuron, 1.1 parts of sodium carboxymethylcellulose and 200 parts of water;
the modified construction waste is prepared by the following method:
s1, crushing and grinding the construction waste, wherein the screen residue of a screen with the grinding particle size of 0.03mm is less than 5 percent, and the construction waste powder is obtained;
s2, placing the construction waste powder obtained in the step S1 into a furnace for programmed calcination, adding bentonite with the mass being 5% of that of the construction waste powder after the programmed calcination, uniformly mixing, heating to 360 ℃, continuously mixing for 30min, and cooling to room temperature to obtain modified construction waste;
In step S2, the procedure of the procedure calcination is: and (3) heating to 800 ℃ within 30min, heating at the speed of 20 ℃/min for 0-10 min after the temperature is increased to 800 ℃, heating to 1200 ℃ at the speed of 10 ℃/min after 10min, keeping for 60min, cooling to 900 ℃ at the speed of 10 ℃/min, keeping for 30min, cooling to 300 ℃ at the speed of 20 ℃/min, and finishing the procedure calcination.
The preparation method of the adhesive based on the construction waste comprises the following steps:
A. weighing 200 parts of ordinary portland cement, 250 parts of modified building garbage, 20 parts of fly ash, 1000 parts of standard sand, 0.2 part of sodium hexafluoroaluminate, 1.4 parts of diafenthiuron, 1.1 parts of sodium carboxymethylcellulose and 200 parts of water for later use;
B. taking a proper volume from the water prepared in the step A, heating to 40 ℃, adding the sodium hexafluoroaluminate and the diafenthiuron weighed in the step A, stirring and mixing for 25min, adding the modified construction waste weighed in the step A and the balance of water while the mixture is hot, continuously stirring and mixing for 30min, and cooling to room temperature to obtain a mixture;
C. and D, sequentially adding the sodium carboxymethyl cellulose, the ordinary portland cement, the fly ash and the standard sand weighed in the step A into the mixture obtained in the step B, and continuously stirring and mixing until the mixture is uniform to obtain the building garbage-based adhesive.
Wherein the stirring speed during stirring and mixing is 400 r/min.
Example 2
The invention provides a construction waste-based adhesive which comprises the following raw materials in parts by weight: 210 parts of ordinary portland cement, 260 parts of modified construction waste, 25 parts of fly ash, 1100 parts of standard sand, 0.4 part of sodium hexafluoroaluminate, 2 parts of diafenthiuron, 1.6 parts of sodium carboxymethylcellulose and 210 parts of water;
the modified construction waste is prepared by the following method:
s1, crushing and grinding the construction waste, wherein the screen residue of a screen with the grinding particle size of 0.03mm is less than 5 percent, and the construction waste powder is obtained;
s2, placing the construction waste powder obtained in the step S1 into a furnace for programmed calcination, adding bentonite with the mass being 6% of that of the construction waste powder after the programmed calcination, uniformly mixing, heating to 355 ℃, continuously mixing for 30min, and cooling to room temperature to obtain modified construction waste;
in step S2, the procedure of the procedure calcination is: and (3) heating to 800 ℃ within 30min, heating at the speed of 20 ℃/min for 0-10 min after the temperature is increased to 800 ℃, heating to 1200 ℃ at the speed of 10 ℃/min after 10min, keeping for 60min, cooling to 900 ℃ at the speed of 10 ℃/min, keeping for 30min, cooling to 300 ℃ at the speed of 20 ℃/min, and finishing the procedure calcination.
The preparation method of the adhesive based on the construction waste comprises the following steps:
A. weighing raw materials according to 210 parts of ordinary portland cement, 260 parts of modified construction waste, 25 parts of fly ash, 1100 parts of standard sand, 0.4 part of sodium hexafluoroaluminate, 2 parts of diafenthiuron, 1.6 parts of sodium carboxymethylcellulose and 210 parts of water for later use;
B. taking a proper volume from the water prepared in the step A, heating to 43 ℃, adding the sodium hexafluoroaluminate and the diafenthiuron weighed in the step A, stirring and mixing for 20min, adding the modified construction waste weighed in the step A and the balance of water while the mixture is hot, continuously stirring and mixing for 35min, and cooling to room temperature to obtain a mixture;
C. and D, sequentially adding the sodium carboxymethyl cellulose, the ordinary portland cement, the fly ash and the standard sand weighed in the step A into the mixture obtained in the step B, and continuously stirring and mixing until the mixture is uniform to obtain the building garbage-based adhesive.
Wherein the stirring speed during stirring and mixing is 350 r/min.
Example 3
The invention provides a construction waste-based adhesive which comprises the following raw materials in parts by weight: 230 parts of ordinary portland cement, 280 parts of modified building waste, 30 parts of fly ash, 1200 parts of standard sand, 0.6 part of sodium hexafluoroaluminate, 2.4 parts of diafenthiuron, 2.2 parts of sodium carboxymethylcellulose and 230 parts of water;
The modified construction waste is prepared by the following method:
s1, crushing and grinding the construction waste, wherein the screen residue of a screen with the grinding particle size of 0.03mm is less than 5 percent, and the construction waste powder is obtained;
s2, placing the construction waste powder obtained in the step S1 into a furnace for programmed calcination, adding bentonite with the mass being 5% -8% of that of the construction waste powder after the programmed calcination, uniformly mixing, heating to 350 ℃, continuously mixing for 30min, and cooling to room temperature to obtain modified construction waste;
in step S2, the procedure of the procedure calcination is: and (3) heating to 800 ℃ within 30min, heating at the speed of 20 ℃/min for 0-10 min after the temperature is increased to 800 ℃, heating to 1200 ℃ at the speed of 10 ℃/min after 10min, keeping for 60min, cooling to 900 ℃ at the speed of 10 ℃/min, keeping for 30min, cooling to 300 ℃ at the speed of 20 ℃/min, and finishing the procedure calcination.
The preparation method of the adhesive based on the construction waste comprises the following steps:
A. weighing 230 parts of ordinary portland cement, 280 parts of modified building waste, 30 parts of fly ash, 1200 parts of standard sand, 0.6 part of sodium hexafluoroaluminate, 2.4 parts of diafenthiuron, 2.2 parts of sodium carboxymethylcellulose and 230 parts of water for later use;
B. Taking a proper volume from the water prepared in the step A, heating to 46 ℃, adding the sodium hexafluoroaluminate and the diafenthiuron weighed in the step A, stirring and mixing for 15min, adding the modified construction waste weighed in the step A and the balance of water while the mixture is hot, continuously stirring and mixing for 40min, and cooling to room temperature to obtain a mixture;
C. and D, sequentially adding the sodium carboxymethyl cellulose, the ordinary portland cement, the fly ash and the standard sand weighed in the step A into the mixture obtained in the step B, and continuously stirring and mixing until the mixture is uniform to obtain the building garbage-based adhesive.
Wherein the stirring speed during stirring and mixing is 300 r/min.
The adhesive prepared in examples 1-3 and a control group (42.5 RI type portland cement, standard sand and water mixed according to a ratio of 1: 3: 0.5) were subjected to performance detection, and the test method: the adhesives prepared in examples 1 to 3 and the adhesive prepared in the control group were put into a mold of 100mm × 100mm × 100mm, vibrated on a vibration table for 3min, cured for 1d under standard conditions (standard curing conditions: temperature 20 ± 2 ℃, humidity 95% or more), demolded, and cured continuously. The results of the performance measurements are shown in Table 1.
Table 1:
| example 1 | Example 2 | Example 3 | Control group | |
| Initial setting time/min | 155 | 140 | 150 | 140 |
| Final setting time/min | 345 | 320 | 335 | 325 |
| 3d compressive strength/MPa | 25.6 | 28.9 | 26.7 | 21.3 |
| 28d compressive strength/MPa | 53.2 | 58.7 | 54.6 | 48.4 |
| 3d flexural strength/MPa | 5.7 | 6.1 | 5.8 | 5.6 |
| 28d flexural strength/MPa | 7.3 | 7.7 | 7.5 | 7.1 |
The detection results in table 1 show that the setting time of the adhesive provided by the invention is similar to that of a control group, and the compressive strength and the flexural strength of the adhesive are obviously superior to those of the control group after curing for 3d and 28d, which indicates that the adhesive provided by the invention has high strength and excellent comprehensive performance.
In examples 4 to 10, sodium hexafluoroaluminate (a) and diafenthiuron (B) in example 2 were replaced according to the ratio shown in table 2, the other conditions were the same as in example 2, and the performance of the binders prepared in examples 4 to 10 was measured by the same method as above. The results are shown in Table 2.
Table 2:
table 2 shows that, in the adhesive formulation, as the ratio of diafenthiuron in sodium hexafluoroaluminate and diafenthiuron gradually increases, the compressive strength and the flexural strength after 3d and 28d curing both show a tendency of increasing and then decreasing, and when the ratio of sodium hexafluoroaluminate and diafenthiuron is 1: 4-7, the compressive strength after 3d curing can reach more than 25MPa, the breaking strength can reach more than 5.5MPa, the compressive strength after 28d curing can reach more than 50MPa, the breaking strength can reach more than 7MPa, and the ratio of sodium hexafluoroaluminate to diafenthiuron is 1: and the strength after 3d and 28d curing is the highest at 5, and the comprehensive performance is the best.
Comparative example
The modified construction waste in example 2 was replaced with a blank construction waste prepared by the following method, and the other conditions were the same as in example 2. The preparation method of the blank construction waste comprises the following steps: s1, crushing and grinding the construction waste, wherein the screen residue of a screen with the grinding particle size of 0.03mm is less than 5 percent, and the construction waste powder is obtained; s2, placing the construction waste powder obtained in the previous step into a furnace for programmed calcination, heating to 355 ℃ after the programmed calcination, continuing mixing for 30min, and cooling to room temperature to obtain blank construction waste; wherein, the procedure of procedure calcination is as follows: and (3) heating to 800 ℃ within 30min, heating at the speed of 20 ℃/min for 0-10 min after the temperature is increased to 800 ℃, heating to 1200 ℃ at the speed of 10 ℃/min after 10min, keeping for 60min, cooling to 900 ℃ at the speed of 10 ℃/min, keeping for 30min, cooling to 300 ℃ at the speed of 20 ℃/min, and finishing the procedure calcination.
And (3) carrying out performance detection on the adhesives obtained by the comparison ratio, wherein the test method is as above, and the result is as follows: the initial setting time is 145min, the final setting time is 330min, the 3d compressive strength is 22.4MPa, the 28-day compressive strength is 52.4MPa, the 3d flexural strength is 5.6MPa, and the 28d flexural strength is 7.4MPa, compared with the results of example 2, the compressive strength and the flexural strength of the adhesive (comparative example) obtained by modifying the construction waste without bentonite are reduced in maintenance for 3d and 28d, and the fact that the modification of the construction waste by the bentonite in the invention has a promoting effect on the improvement of the final adhesive strength is shown.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The adhesive based on the construction waste is characterized by comprising the following raw materials in parts by weight: 200-230 parts of ordinary portland cement, 250-280 parts of modified building waste, 20-30 parts of fly ash, 1000-1200 parts of standard sand, 0.2-0.6 part of sodium hexafluoroaluminate, 1.4-2.4 parts of diafenthiuron, 1.1-2.2 parts of sodium carboxymethylcellulose and 200-230 parts of water;
the modified construction waste is prepared by the following method:
s1, crushing and grinding the construction waste, wherein the screen residue of a screen with the grinding particle size of 0.03mm is less than 5 percent, and the construction waste powder is obtained;
s2, placing the construction waste powder obtained in the step S1 into a furnace for program calcination, adding bentonite with the mass being 5% -8% of that of the construction waste powder after the program calcination, uniformly mixing, heating to 350-360 ℃, continuously mixing for 30min, and cooling to room temperature to obtain the modified construction waste.
2. The construction waste-based adhesive according to claim 1, comprising the following raw materials in parts by weight: 210 parts of ordinary portland cement, 260 parts of modified construction waste, 25 parts of fly ash, 1100 parts of standard sand, 0.4 part of sodium hexafluoroaluminate, 2 parts of diafenthiuron, 1.6 parts of sodium carboxymethylcellulose and 210 parts of water.
3. The construction waste-based binder according to claim 1, wherein in step S2, the procedure of calcination is: and (3) heating to 800 ℃ within 30min, heating at the speed of 20 ℃/min for 0-10 min after the temperature is increased to 800 ℃, heating to 1200 ℃ at the speed of 10 ℃/min after 10min, keeping for 60min, cooling to 900 ℃ at the speed of 10 ℃/min, keeping for 30min, cooling to 300 ℃ at the speed of 20 ℃/min, and finishing the procedure calcination.
4. The construction waste-based binder according to claim 1 or 2, wherein the mass ratio of sodium hexafluoroaluminate to diafenthiuron is 1: 4 to 7.
5. A preparation method of a construction waste-based adhesive is characterized by comprising the following steps:
A. weighing the raw materials according to 200-230 parts of ordinary portland cement, 250-280 parts of modified building waste, 20-30 parts of fly ash, 1000-1200 parts of standard sand, 0.2-0.6 part of sodium hexafluoroaluminate, 1.4-2.4 parts of diafenthiuron, 1.1-2.2 parts of sodium carboxymethylcellulose and 200-230 parts of water for later use;
B. Taking a proper volume from the water prepared in the step A, heating to 40-46 ℃, adding the sodium hexafluoroaluminate and the diafenthiuron weighed in the step A, stirring and mixing for 15-25 min, adding the modified construction waste weighed in the step A and the balance of water while the mixture is hot, continuing stirring and mixing for 30-40 min, and cooling to room temperature to obtain a mixture;
C. and D, sequentially adding the sodium carboxymethyl cellulose, the ordinary portland cement, the fly ash and the standard sand weighed in the step A into the mixture obtained in the step B, and continuously stirring and mixing until the mixture is uniform to obtain the building garbage-based adhesive.
6. The preparation method of the building garbage-based adhesive according to claim 5, wherein the stirring speed during stirring and mixing is 300-400 r/min.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002137950A (en) * | 2000-10-31 | 2002-05-14 | Taiheiyo Cement Corp | Cement-based solidifier |
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| CN108203284A (en) * | 2018-02-27 | 2018-06-26 | 合肥雅克丽新型建材有限公司 | Energy-saving, heat-preserving, sound-insulating and environment-friendly building mortar and preparation method thereof |
| CN110194625A (en) * | 2019-06-19 | 2019-09-03 | 深圳市航天新材科技有限公司 | A method of optimization water mudrock structure simultaneously improves concrete anticorrosion anti-permeability performance |
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| JP2002137950A (en) * | 2000-10-31 | 2002-05-14 | Taiheiyo Cement Corp | Cement-based solidifier |
| CN106186959A (en) * | 2016-07-21 | 2016-12-07 | 武汉源锦商品混凝土有限公司 | Regenerated micro-powder mortar and preparation method thereof |
| CN110891424A (en) * | 2017-06-09 | 2020-03-17 | Upl有限公司 | Novel insecticidal combination |
| CN108203284A (en) * | 2018-02-27 | 2018-06-26 | 合肥雅克丽新型建材有限公司 | Energy-saving, heat-preserving, sound-insulating and environment-friendly building mortar and preparation method thereof |
| CN110194625A (en) * | 2019-06-19 | 2019-09-03 | 深圳市航天新材科技有限公司 | A method of optimization water mudrock structure simultaneously improves concrete anticorrosion anti-permeability performance |
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