CN116003014A - Reinforced recycled concrete aggregate and preparation method thereof - Google Patents
Reinforced recycled concrete aggregate and preparation method thereof Download PDFInfo
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- CN116003014A CN116003014A CN202211626203.2A CN202211626203A CN116003014A CN 116003014 A CN116003014 A CN 116003014A CN 202211626203 A CN202211626203 A CN 202211626203A CN 116003014 A CN116003014 A CN 116003014A
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- 239000004567 concrete Substances 0.000 title claims abstract description 156
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 239000002002 slurry Substances 0.000 claims abstract description 103
- 239000011521 glass Substances 0.000 claims abstract description 85
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000000843 powder Substances 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 238000002156 mixing Methods 0.000 claims abstract description 21
- 239000002245 particle Substances 0.000 claims abstract description 20
- 239000002893 slag Substances 0.000 claims abstract description 20
- 230000005284 excitation Effects 0.000 claims abstract description 16
- 238000001914 filtration Methods 0.000 claims abstract description 15
- 238000002791 soaking Methods 0.000 claims abstract description 12
- 239000007787 solid Substances 0.000 claims description 36
- 239000002699 waste material Substances 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 20
- 238000000227 grinding Methods 0.000 claims description 12
- 238000002604 ultrasonography Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 239000004575 stone Substances 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 238000007873 sieving Methods 0.000 claims description 2
- 239000004570 mortar (masonry) Substances 0.000 abstract description 9
- 230000008439 repair process Effects 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 10
- 239000004568 cement Substances 0.000 description 9
- 238000003756 stirring Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 150000002500 ions Chemical class 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- -1 silicate ions Chemical class 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000029087 digestion Effects 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910021487 silica fume Inorganic materials 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
Classifications
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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
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The application relates to a preparation method of reinforced recycled concrete aggregate, which comprises the following steps: placing the superfine glass powder with the median particle size of 0.5-2 mu m into water for soaking for 24-48 hours to obtain superfine glass liquid; mixing the superfine glass liquid with concrete slurry slag, adding water to prepare slurry, and performing ultrasonic excitation to obtain reinforced slurry; and placing the recycled concrete aggregate in the reinforced slurry, and filtering to obtain the reinforced recycled concrete aggregate. According to the invention, the reinforced slurry is prepared by mixing the superfine glass liquid and the concrete slurry slag, and the reinforced slurry is used for carrying out slurry wrapping treatment on the recycled concrete aggregate so as to repair micropores of mortar on the surface of the recycled concrete aggregate, so that the reinforced recycled concrete aggregate with a surface reinforced layer is obtained; compared with unreinforced recycled concrete aggregate, the concrete prepared from the reinforced recycled concrete aggregate has higher compressive strength.
Description
Technical Field
The application relates to the technical field of building materials, in particular to reinforced recycled concrete aggregate and a preparation method thereof.
Background
The recycled concrete aggregate is a substance obtained by crushing and screening the discarded concrete after the building is dismantled, and can partially or completely replace natural aggregate to prepare the recycled concrete for recycling in new buildings.
However, the surface of the recycled concrete aggregate is generally coated with part of mortar, and the higher the original concrete grade is, the greater the extent of the recycled concrete aggregate coated with the mortar is. Mortar wrapped on the surface of recycled concrete aggregate can cause the recycled concrete to have large porosity, large water absorption and low strength.
Disclosure of Invention
The embodiment of the application provides a reinforced recycled concrete aggregate and a preparation method thereof, which are used for solving the problems of high recycled concrete porosity, high water absorption and low strength caused by mortar wrapping on the surface of the recycled concrete aggregate in the related technology.
The first aspect of the embodiment of the application provides a preparation method of reinforced recycled concrete aggregate, which comprises the following steps:
placing the superfine glass powder with the median particle size of 0.5-2 mu m into water for soaking for 24-48 hours to obtain superfine glass liquid;
mixing the superfine glass liquid with concrete slurry slag, adding water to prepare slurry, and performing ultrasonic excitation to obtain reinforced slurry;
and placing the recycled concrete aggregate in the reinforced slurry, and filtering to obtain the reinforced recycled concrete aggregate.
In some embodiments, the ultra-fine glass powder is produced from waste glass grinding, and the ultra-fine glass liquid has a solids content of 30% to 50%.
In some embodiments, the concrete slurry is prepared by mixing waste concrete separated by sand and stone with waste concrete slurry water and then press-filtering, and the solid content is 30-50%.
In some embodiments, the stacking time of the concrete grout is less than or equal to 24 hours.
In some embodiments, the power of the ultrasound is 200W-300W, the ultrasound time is 20 min-60 min, and the ultrasound temperature is 40-80 ℃.
In some embodiments, the solids content of the strengthening slurry is 20% to 40%.
In some embodiments, the recycled concrete aggregate is obtained from waste concrete through crushing, screening and drying.
In some embodiments, the recycled concrete aggregate has an aggregate particle size of 40mm or less.
In some embodiments, the recycled concrete aggregate is stirred for 30 minutes to 120 minutes while being placed in the reinforcement slurry.
In a second aspect, embodiments of the present application provide a reinforced recycled concrete aggregate prepared according to the method of any one of the above.
The beneficial effects that technical scheme that this application provided brought include:
the reinforced slurry is prepared by mixing superfine glass liquid and concrete slurry slag, and the reinforced slurry is used for carrying out slurry wrapping treatment on the recycled concrete aggregate so as to repair micropores of mortar on the surface of the recycled concrete aggregate, so that the reinforced recycled concrete aggregate with a surface reinforced layer is obtained; when the reinforced slurry is prepared, a large amount of active ions in the superfine glass powder and the concrete slurry slag are released rapidly by ultrasonic excitation, and meanwhile, the concrete slurry slag is alkaline and has a gelling effect, so that the reinforced slurry can partially replace cement, and can generate substances with certain strength, such as silicate and the like, with the active ions in the superfine glass powder to compact micropores of the recycled concrete aggregate surface mortar; compared with unreinforced recycled concrete aggregate, the concrete prepared from the reinforced recycled concrete aggregate has higher compressive strength.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart showing the steps of a method for preparing reinforced recycled concrete aggregate according to an embodiment of the present invention.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.
Referring to fig. 1, a first aspect of the embodiment of the present application provides a method for preparing reinforced recycled concrete aggregate, including the steps of:
s1, placing superfine glass powder with the median particle diameter of 0.5-2 mu m into water for soaking for 24-48 hours to obtain superfine glass liquid;
s2, mixing the superfine glass liquid with concrete slurry slag, adding water to prepare slurry, and performing ultrasonic excitation to obtain reinforced slurry;
and S3, placing the recycled concrete aggregate in the reinforced slurry, and filtering to obtain the reinforced recycled concrete aggregate.
According to the embodiment of the application, the reinforced slurry is prepared by mixing the superfine glass liquid and the concrete slurry slag, and the reinforced slurry is used for carrying out slurry wrapping treatment on the recycled concrete aggregate so as to repair micropores of mortar on the surface of the recycled concrete aggregate, so that the reinforced recycled concrete aggregate with the surface reinforced layer is obtained; when the reinforced slurry is prepared, a large amount of active ions in the superfine glass powder and the concrete slurry slag are released rapidly by ultrasonic excitation, and meanwhile, the concrete slurry slag is alkaline and has a gelling effect, so that the reinforced slurry can partially replace cement, and can generate substances with certain strength, such as silicate and the like, with the active ions in the superfine glass powder to compact micropores of the recycled concrete aggregate surface mortar; compared with unreinforced recycled concrete aggregate, the concrete prepared from the reinforced recycled concrete aggregate has higher compressive strength.
In some embodiments, the ultra-fine glass powder is produced from waste glass grinding, and the ultra-fine glass liquid has a solids content of 30% to 50%.
The superfine glass powder is prepared by grinding waste glass, the sources of the waste glass comprise colored and colorless glass products, and the waste glass is used as a raw material of reinforced slurry to reinforce the recycled concrete aggregate, so that the waste glass is beneficial to the digestion and recycling of solid wastes; the main component of the waste glass is silicon dioxide, which is the same as the main component of the silica fume, and the activity of the waste glass is improved through superfine treatment, so that the waste glass can replace the silica fume; the median particle diameter of the ground superfine glass powder is 0.5-2 mu m, and the smaller the particle diameter is, the better the activity of the superfine glass powder is; the superfine glass powder is soaked in clear water, so that the leaching degree of active ions such as silicate ions is effectively improved, and the reaction rate is accelerated.
In some embodiments, the concrete slurry is prepared by mixing waste concrete separated by sand and stone with waste concrete slurry water and then press-filtering, and the solid content is 30-50%.
Specifically, the concrete slurry slag is obtained by mixing redundant concrete generated in the process of producing concrete in a concrete mixing station with concrete waste slurry generated by cleaning a concrete mixer, a cleaning site and a concrete mixer truck in a sedimentation tank after sand and stone separation and then performing filter pressing, wherein the main component of the concrete slurry slag is cement and mineral admixture which are hydrated and unhydrated in fresh concrete, the alkalinity is more than 11.5, and the activity of superfine glass powder can be effectively excited after the concrete slurry slag is mixed with superfine glass liquid, so that the reaction of the superfine glass powder is accelerated; the recycled concrete aggregate is reinforced by taking the waste concrete slurry slag as the raw material of the reinforced slurry, which is beneficial to the digestion and recycling of solid wastes.
In some embodiments, the stacking time of the concrete grout residue is less than or equal to 24 hours. The shorter the storage time of the concrete slurry slag is, the stronger the gelation and alkalinity are, and the better the strengthening effect is.
The ultrasonic wave can be completed by an ultrasonic cleaner or other ultrasonic equipment. The ultrasonic wave is a high-frequency sonic wave, and when the ultrasonic wave propagates in water, a large number of tiny vacuum bubbles are generated in the water, and when the vacuum bubbles are pressurized in the water and burst, the generated shock wave acts on particles in superfine glass powder and concrete slurry slag, so that the particles are rapidly disintegrated, and a large number of active calcium ions, silicate ions, aluminum ions and the like are released, so that the excitation effect is achieved.
In some embodiments, the power of the ultrasound is 200W to 300W, the ultrasound time is 20min to 60min, and the ultrasound temperature is 40 ℃ to 80 ℃.
In some embodiments, the solids content of the reinforcement slurry is 20% to 40%.
The reinforced slurry is obtained by ultrasonic excitation of slurry prepared by mixing superfine glass liquid and concrete slurry slag, so that partial cement can be directly replaced without draining, and after the solid mass and the water mass of the reinforced slurry adsorbed by the reinforced recycled concrete aggregate are calculated, the mass of the corresponding cement and water can be directly deducted when the concrete is prepared, and the cement consumption is saved.
In some embodiments, recycled concrete aggregate is obtained from waste concrete through crushing, sieving, and drying.
In some embodiments, the recycled concrete aggregate has an aggregate particle size of 40mm or less. Wherein the recycled concrete aggregate with the aggregate grain diameter of 4.75mm to 40mm is coarse aggregate, and the recycled concrete aggregate with the aggregate grain diameter of less than or equal to 4.75mm is fine aggregate.
In some embodiments, the recycled concrete aggregate is stirred for 30 minutes to 120 minutes while being placed in the reinforcement slurry. The solid particles in the reinforced slurry can better enter the micropores of the recycled concrete aggregate by stirring, and the reinforcing effect is better.
In a second aspect, embodiments of the present application provide a reinforced recycled concrete aggregate prepared according to the above method.
Example 1
Grinding the waste glass to obtain superfine glass powder with the median particle diameter of 0.5 mu m, and soaking the superfine glass powder in water for 48 hours to obtain superfine glass liquid with the solid content of 30%; mixing the superfine glass liquid with concrete slurry residue with the solid content of 40%, adding water to prepare slurry, and placing the slurry into a pool of an ultrasonic cleaner for ultrasonic excitation, wherein the ultrasonic power is 300W, the ultrasonic time is 60min, and the ultrasonic temperature is 60 ℃ to obtain reinforced slurry with the solid content of 30%; and placing the recycled concrete aggregate into the reinforced slurry, stirring for 80min, and filtering to obtain the reinforced recycled concrete aggregate.
Example 2
Grinding the waste glass to obtain superfine glass powder with the median particle diameter of 0.8 mu m, and soaking the superfine glass powder in water for 48 hours to obtain superfine glass liquid with the solid content of 30%; mixing the superfine glass liquid with concrete slurry residue with the solid content of 40%, adding water to prepare slurry, and placing the slurry into a pool of an ultrasonic cleaner for ultrasonic excitation, wherein the ultrasonic power is 300W, the ultrasonic time is 60min, and the ultrasonic temperature is 60 ℃ to obtain reinforced slurry with the solid content of 30%; and placing the recycled concrete aggregate into the reinforced slurry, stirring for 80min, and filtering to obtain the reinforced recycled concrete aggregate.
Example 3
Grinding the waste glass to obtain superfine glass powder with a median particle diameter of 2 mu m, and soaking the superfine glass powder in water for 48 hours to obtain superfine glass liquid with a solid content of 30%; mixing the superfine glass liquid with concrete slurry residue with the solid content of 40%, adding water to prepare slurry, and placing the slurry into a pool of an ultrasonic cleaner for ultrasonic excitation, wherein the ultrasonic power is 300W, the ultrasonic time is 60min, and the ultrasonic temperature is 60 ℃ to obtain reinforced slurry with the solid content of 30%; and placing the recycled concrete aggregate into the reinforced slurry, stirring for 80min, and filtering to obtain the reinforced recycled concrete aggregate.
Example 4
Grinding the waste glass to obtain superfine glass powder with the median particle diameter of 0.8 mu m, and soaking the superfine glass powder in water for 24 hours to obtain superfine glass liquid with the solid content of 30%; mixing the superfine glass liquid with concrete slurry residue with the solid content of 40%, adding water to prepare slurry, and placing the slurry into a pool of an ultrasonic cleaner for ultrasonic excitation, wherein the ultrasonic power is 300W, the ultrasonic time is 60min, and the ultrasonic temperature is 60 ℃ to obtain reinforced slurry with the solid content of 30%; and placing the recycled concrete aggregate into the reinforced slurry, stirring for 80min, and filtering to obtain the reinforced recycled concrete aggregate.
Example 5
Grinding the waste glass to obtain superfine glass powder with the median particle diameter of 0.8 mu m, and soaking the superfine glass powder in water for 48 hours to obtain superfine glass liquid with the solid content of 50%; mixing the superfine glass liquid with concrete slurry residue with the solid content of 50%, adding water to prepare slurry, and placing the slurry into a pool of an ultrasonic cleaner for ultrasonic excitation, wherein the ultrasonic power is 240W, the ultrasonic time is 60min, and the ultrasonic temperature is 60 ℃ to obtain reinforced slurry with the solid content of 30%; and placing the recycled concrete aggregate into the reinforced slurry, stirring for 80min, and filtering to obtain the reinforced recycled concrete aggregate.
Example 6
Grinding the waste glass to obtain superfine glass powder with the median particle diameter of 0.8 mu m, and soaking the superfine glass powder in water for 48 hours to obtain superfine glass liquid with the solid content of 30%; mixing the superfine glass liquid with concrete slurry residue with the solid content of 40%, adding water to prepare slurry, and placing the slurry into a pool of an ultrasonic cleaner for ultrasonic excitation, wherein the ultrasonic power is 300W, the ultrasonic time is 20min, and the ultrasonic temperature is 60 ℃ to obtain reinforced slurry with the solid content of 30%; and placing the recycled concrete aggregate into the reinforced slurry, stirring for 80min, and filtering to obtain the reinforced recycled concrete aggregate.
Example 7
Grinding the waste glass to obtain superfine glass powder with the median particle diameter of 0.8 mu m, and soaking the superfine glass powder in water for 48 hours to obtain superfine glass liquid with the solid content of 30%; mixing the superfine glass liquid with concrete slurry residue with the solid content of 40%, adding water to prepare slurry, and placing the slurry into a pool of an ultrasonic cleaner for ultrasonic excitation, wherein the ultrasonic power is 300W, the ultrasonic time is 60min, and the ultrasonic temperature is 80 ℃ to obtain reinforced slurry with the solid content of 30%; and (3) placing the recycled concrete aggregate into the reinforced slurry, stirring for 60min, and filtering to obtain the reinforced recycled concrete aggregate.
Example 8
Grinding the waste glass to obtain superfine glass powder with the median particle diameter of 0.8 mu m, and soaking the superfine glass powder in water for 48 hours to obtain superfine glass liquid with the solid content of 30%; mixing the superfine glass liquid with concrete slurry residue with the solid content of 40%, adding water to prepare slurry, and placing the slurry into a pool of an ultrasonic cleaner for ultrasonic excitation, wherein the ultrasonic power is 300W, the ultrasonic time is 60min, and the ultrasonic temperature is 80 ℃ to obtain reinforced slurry with the solid content of 30%; and (3) placing the recycled concrete aggregate into the reinforced slurry, stirring for 120min, and filtering to obtain the reinforced recycled concrete aggregate.
Comparative examples
Unreinforced recycled concrete aggregate: the concrete is obtained by crushing, screening and drying waste concrete.
Testing performance
Concrete samples were prepared from the reinforced recycled concrete aggregates prepared in examples 1 to 8 and the unreinforced recycled concrete aggregates prepared in comparative examples according to the following proportions, as shown in table 1.
The following proportions are proportions of the concrete test pieces prepared in the comparative examples, and when the reinforced recycled concrete aggregate prepared in examples 1 to 8 is prepared in the concrete test pieces, the mass of the corresponding cement and the mass of water are directly subtracted by calculation when the concrete test pieces are prepared because the solid mass of the reinforced slurry adsorbed by each reinforced recycled concrete aggregate is different from the mass of the water.
Table 1 proportions (unit: kg/m) 3 )
The prepared concrete test piece is tested for compressive strength and electric flux according to the Highway engineering Cement and Cement concrete test procedure, and the test results are shown in tables 2 and 3 respectively.
Table 2 compressive strength test results
| Group of | 3d(MPa) | 7d(MPa) | 28d(MPa) |
| Comparative examples | 31.5 | 37.6 | 40.2 |
| Example 1 | 45.6 | 51.5 | 60.6 |
| Example 2 | 42.3 | 50.5 | 58.8 |
| Example 3 | 39.3 | 42.5 | 48.3 |
| Example 4 | 42.1 | 49.3 | 59.8 |
| Example 5 | 44.6 | 51.9 | 61.3 |
| Example 6 | 41.6 | 48.3 | 56.8 |
| Example 7 | 42.9 | 52.5 | 59.1 |
| Example 8 | 41.9 | 51.4 | 60.8 |
TABLE 3 results of electric flux test
Compressive strength refers to the maximum pressure that can be sustained per unit area of a cubic test piece. The electric flux of the concrete test piece reflects the chloride ion permeation resistance of the concrete.
As can be seen from tables 2 and 3, in the examples 1 to 8 of the present application, the prepared concrete 3d compressive strength was improved by more than 24%, 7d compressive strength was improved by more than 13%, 28d compressive strength was improved by more than 20%, and electric flux was reduced by more than 57% by using the reinforced recycled concrete aggregate, as compared with the non-reinforced recycled concrete aggregate used in the comparative example.
In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description of the present application and simplification of the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
It should be noted that in this application, relational terms such as "first" and "second" and the like are 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 one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The preparation method of the reinforced recycled concrete aggregate is characterized by comprising the following steps of:
placing the superfine glass powder with the median particle size of 0.5-2 mu m into water for soaking for 24-48 hours to obtain superfine glass liquid;
mixing the superfine glass liquid with concrete slurry slag, adding water to prepare slurry, and performing ultrasonic excitation to obtain reinforced slurry;
and placing the recycled concrete aggregate in the reinforced slurry, and filtering to obtain the reinforced recycled concrete aggregate.
2. The method for preparing reinforced recycled concrete aggregate according to claim 1, wherein the ultra-fine glass powder is prepared by grinding waste glass, and the solid content of the ultra-fine glass liquid is 30% -50%.
3. The method for preparing reinforced recycled concrete aggregate according to claim 1, wherein the concrete slurry slag is prepared by mixing waste concrete separated by sand and stone with waste concrete slurry water and then press-filtering, and the solid content is 30-50%.
4. A method of preparing reinforced recycled concrete aggregate as claimed in claim 3 wherein the stacking time of the concrete slag is less than or equal to 24 hours.
5. The method for preparing reinforced recycled concrete aggregate according to claim 1, wherein the power of the ultrasound is 200W to 300W, the ultrasound time is 20min to 60min, and the ultrasound temperature is 40 ℃ to 80 ℃.
6. The method for preparing reinforced recycled concrete aggregate according to claim 1, wherein the solid content of the reinforcing slurry is 20% to 40%.
7. The method for preparing reinforced recycled concrete aggregate according to claim 1, wherein the recycled concrete aggregate is obtained by crushing, sieving and drying waste concrete.
8. The method for preparing reinforced recycled concrete aggregate according to claim 1, wherein the particle size of the recycled concrete aggregate is not more than 40mm.
9. The method for preparing reinforced recycled concrete aggregate according to claim 1, wherein the recycled concrete aggregate is stirred for 30 to 120 minutes when placed in the reinforced slurry.
10. A reinforced recycled concrete aggregate prepared by the method of any one of claims 1-9.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106007438A (en) * | 2016-05-24 | 2016-10-12 | 湖南大学 | Treatment method of volcanic-ash-paste-reinforced recycled concrete aggregate |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106007438A (en) * | 2016-05-24 | 2016-10-12 | 湖南大学 | Treatment method of volcanic-ash-paste-reinforced recycled concrete aggregate |
Non-Patent Citations (4)
| Title |
|---|
| XIAOLIANG FANG ET.AL: "Enhancing the accelerated carbonation of recycled concrete aggregates by using reclaimed wastewater from concrete batching plants", 《CONSTRUCTION AND BUILDING MATERIALS》, vol. 239, 23 December 2019 (2019-12-23), pages 117810 - 117819, XP086075750, DOI: 10.1016/j.conbuildmat.2019.117810 * |
| 张兰芳著: "《碱激发矿渣水泥和混凝土》", vol. 1, 31 August 2018, 西南交通大学出版社, pages: 32 - 33 * |
| 曾郴林等: "《工业废水处理工程设计实例》", vol. 1, 31 January 2017, 中国环境出版社, pages: 2 * |
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