CN118262835A - Graded determining method for simulating actual production of asphalt concrete by asphalt mixing station - Google Patents
Graded determining method for simulating actual production of asphalt concrete by asphalt mixing station Download PDFInfo
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- 239000010426 asphalt Substances 0.000 title claims abstract description 84
- 239000011384 asphalt concrete Substances 0.000 title claims abstract description 84
- 238000002156 mixing Methods 0.000 title claims abstract description 74
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000012216 screening Methods 0.000 claims abstract description 33
- 238000005070 sampling Methods 0.000 claims abstract description 16
- 239000012615 aggregate Substances 0.000 claims description 91
- 239000000203 mixture Substances 0.000 claims description 69
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 57
- 239000011707 mineral Substances 0.000 claims description 57
- 238000012360 testing method Methods 0.000 claims description 33
- 239000000463 material Substances 0.000 claims description 25
- 238000004458 analytical method Methods 0.000 claims description 24
- 239000000843 powder Substances 0.000 claims description 19
- 238000001514 detection method Methods 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 12
- 239000004575 stone Substances 0.000 claims description 10
- 230000003993 interaction Effects 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 238000005457 optimization Methods 0.000 claims description 6
- 230000035515 penetration Effects 0.000 claims description 6
- 238000003908 quality control method Methods 0.000 claims description 6
- 238000003786 synthesis reaction Methods 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000011835 investigation Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000011056 performance test Methods 0.000 claims description 3
- 238000011065 in-situ storage Methods 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims 1
- 238000012795 verification Methods 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 4
- 239000004567 concrete Substances 0.000 abstract description 3
- 238000009435 building construction Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 10
- 239000000523 sample Substances 0.000 description 10
- 238000005056 compaction Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000011362 coarse particle Substances 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000006101 laboratory sample Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/383—Concrete or cement
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16C—COMPUTATIONAL CHEMISTRY; CHEMOINFORMATICS; COMPUTATIONAL MATERIALS SCIENCE
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Abstract
The invention relates to the technical field of building construction, and provides a grading determination method for simulating actual production of asphalt concrete by an asphalt mixing station. The grading determination method for simulating the actual production of asphalt concrete by an asphalt mixing station comprises the following steps: sampling aggregate in each bin; after sampling, screening aggregates in each bin to obtain grading information of the aggregates in each bin; the grading information is combined into an overall grading to achieve the grading determination. In the concrete implementation, the asphalt mixing station can completely reach a normal production state, and the integral grading is determined after the asphalt mixing station is directly sampled, screened and combined in each grade of aggregate bin, so that the obtained grading information is more accurate, the fluctuation of a mixing proportion grading curve in the construction production process is prevented, the mixing proportion grading curve is matched with various data of a target mixing proportion, and the technical problem that a larger error exists between the result obtained by sampling and screening asphalt concrete in a laboratory and the verification of the production mixing proportion is solved.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a grading determination method for simulating an asphalt mixing station to actually produce asphalt concrete.
Background
The main function of the asphalt mixing station is to mix asphalt, mineral powder, aggregate and the like according to a certain proportion to finally generate asphalt concrete for paving roads and the like.
The laboratory samples and screens asphalt concrete during actual production, and the result obtained after screening is generally overall grading finer, compared with larger in-out when verifying production mix. Wherein, grading refers to the particle distribution and relative proportion of aggregates (such as broken stone, machine-made sand and the like) in asphalt concrete; the production mixing ratio refers to the proportion and the mixing relation of different raw materials in the actual production process of asphalt concrete by an asphalt mixing station; the dominant factor is that the conventional production capacity of the 4000-type asphalt mixing station is about 300 tons/hour, and the asphalt mixing station is only 100 tons/hour-200 tons/hour when the production mix is verified, so that the actual production capacity is higher than the production capacity of a laboratory sampled when the production mix is verified, that is, the actual yield is higher than the yield of the laboratory, the yield is a key factor affecting the stability of the grading, the yield is large and represents the overall grading is thin, and the yield is small and represents the overall grading is thick.
The asphalt content is extremely sensitive to grading composition, and is generally divided into two cases, wherein the first case is that grading is finer, if grading is finer, the specific surface area of broken stone can be increased, and if the specific surface area is increased, the compaction degree, water seepage and other related indexes on site can be influenced if the oil-stone ratio is not adjusted; wherein, the specific surface area (Specific Surface Area) refers to the surface area of the substance per unit mass or unit volume. In material science and engineering, specific surface area is generally used to describe the surface characteristics of a particle or material, reflecting the surface area of molecules or particles within a unit mass or volume of the material; for particulate matter, an increase in specific surface area generally means a fine and more surface area of the particles, e.g., a small, porous particle may have a higher specific surface area than a large, smooth particle; the whetstone ratio refers to the mass ratio of asphalt to aggregate in asphalt concrete; the second condition is that the grading is coarse, if the grading is coarse, conditions such as segregation, difficulty in rolling and compaction and the like can occur; segregation refers to the phenomenon that aggregates and asphalt in asphalt concrete are separated, if the grading is coarse, larger particles may not be fully wrapped in asphalt, so that the aggregates and asphalt in the asphalt concrete are layered to form segregation phenomenon, which reduces the uniformity and stability of the asphalt concrete; the difficulty in rolling compaction is that the coarse grading can cause poor compactness of the asphalt concrete, and more pores can exist among larger particles, so that the asphalt concrete is difficult to fully compact through rolling in the construction process. This affects the mechanical properties and structural stability of the asphalt concrete.
Therefore, the result obtained by sampling and screening the asphalt concrete in the laboratory has larger error with the verification of the production mix ratio, and the compactness, water seepage and other related indexes on site are affected.
Disclosure of Invention
The invention provides a grading determination method for simulating actual production of asphalt concrete by an asphalt mixing station, which is used for solving the technical problems that the result obtained by sampling and screening the asphalt concrete in a laboratory has larger error with the verification of the production mix proportion, and the compactness, water seepage and other related indexes on site are affected.
The invention provides a grading determination method for simulating actual production of asphalt concrete by an asphalt mixing station, which comprises the following steps: sampling aggregate in each bin; after sampling, screening aggregates in each bin to obtain grading information of the aggregates in each bin; the grading information is combined into an overall grading to achieve the grading determination.
According to one embodiment of the present invention, further comprising: in the mixing process of asphalt concrete, an asphalt concrete detection sample is collected in real time from a finished product bin, the total mass of the asphalt concrete detection sample is measured and sent to an analysis module, and the analysis module is used for analyzing data.
According to one embodiment of the invention, the collected asphalt concrete test sample is burned, and mineral aggregates are separated under the condition that asphalt is completely burned.
According to one embodiment of the invention, the separated mineral aggregates are screened step by step to obtain each grade of matched mineral aggregates, and the quality of each grade of matched mineral aggregates is measured in real time and sent to an analysis module.
According to one embodiment of the invention, the analysis module receives the total mass of the asphalt concrete detection sample and the mass of each stage of the matched mineral aggregate in real time, and divides the mass of each stage of the separated matched mineral aggregate by the total mass of the asphalt concrete detection sample to obtain the mass ratio of asphalt to each stage of the matched mineral aggregate.
According to one embodiment of the present invention, further comprising: and establishing a database of material indexes, film thickness, gradation, oil-stone ratio, film thickness, specific surface area and mixture performance according to on-site raw materials, wherein the raw materials comprise asphalt, aggregate and mineral powder.
According to one embodiment of the invention, a database of material index, film thickness, grading, oil-stone ratio, film thickness, specific surface area and mix properties is established from raw materials in situ, comprising: performing performance index tests according to asphalt, aggregate and mineral powder on site; after finishing the performance index test, investigation and sampling are carried out on mineral aggregate, the grading composition condition of each mineral aggregate is analyzed, the grading is randomly synthesized according to the composition proportion of the target mixing proportion or the production mixing proportion, the grading composition range of the asphalt concrete is obtained, and the fluctuation of the synthesized grading is judged and used as the quality control basis; wherein the mineral aggregate comprises aggregate and mineral powder; according to the grading composition range, designing asphalt concrete with various typical grading compositions, and testing the dosage performance of asphalt concrete with different grading compositions to obtain the asphalt concrete performance with different asphalt dosage and different grading compositions; and calculating the thickness of the asphalt film according to the results of the performance index test, the asphalt concrete performance test results of different asphalt dosages and different grading compositions, and the test results of the target blending ratio and the production blending ratio, and establishing a material index, film thickness, grading and mixture performance database.
According to one embodiment of the invention, the performance indicators include: testing conventional indexes of density, penetration, softening point, ductility, viscosity and solubility of asphalt; the density of the on-site aggregate and mineral powder and the screening group obtained by screening according to the density; the shape composition of the screening grouping aggregate is analyzed through screening test; dividing the sieve group into analysis units according to the shape proportion of the sieve group aggregate, numbering and recording the quality; the surface texture and texture of the analysis unit were tested.
According to one embodiment of the invention, the thickness of asphalt film is calculated, and a database of material index, film thickness, grading and mixture properties is built, comprising: testing conventional indexes of density, penetration, softening point, ductility, viscosity and solubility of asphalt; the density of the on-site aggregate and mineral powder and the screening group obtained by screening according to the density; analyzing the shape composition of the sieve grouping aggregate; dividing the sieve group into analysis units according to the shape proportion of the sieve group aggregate, numbering and recording the quality; testing the surface texture and texture of the analysis unit; adhesion or interaction tests analyze the interaction of mineral aggregate with asphalt; according to the screening result, grading synthesis is carried out according to the production mixing ratio, and the synthesis result is analyzed for optimization; analyzing relevant variability indexes according to the grading optimization result, and analyzing the specific surface area by adopting a specific surface area calculation method; calculating asphalt volume of the unit quantity mixture according to asphalt consumption and density indexes; the surface area of the mineral aggregate in the unit amount of the mixture is calculated on the basis of the specific surface area.
According to one embodiment of the present invention, after the material index, film thickness, gradation, and mix performance database is built according to the raw materials in the field, it further comprises: predicting and monitoring the quality of the field mixture; wherein the field mixture is formed by mixing asphalt, aggregate and mineral powder; and (3) adjusting the proportion of cold materials to hot materials of the field mixture, mixing according to the adjusted production mixing proportion, and controlling the grading composition of the asphalt concrete to control the quality of the asphalt concrete.
The grading determination method for simulating the actual production of asphalt concrete by the asphalt mixing station has the characteristics and advantages that:
The actual bins are sampled and screened to obtain the grading of the aggregates in each bin, after the grading of the aggregates in each bin is obtained, namely, after the information of the coarse particles and the fine particles of the aggregates in each bin is obtained, the information is combined into the whole grading, so that the proportion of the aggregates with the particle sizes in the whole asphalt concrete can be obtained, the asphalt mixing station can completely reach the normal production state, the whole grading is determined after the aggregates are directly sampled, screened and combined in each bin of the asphalt mixing station, the obtained grading information is more accurate, the fluctuation of a blending proportion grading curve in the construction production process is prevented, the matching with each item of data of a target blending proportion is avoided, and the technical problem that the result obtained by sampling and screening the asphalt concrete in a test room has larger error in verification of the production blending proportion is solved.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic illustration of one embodiment of the grading determination method of the present invention for simulating actual production of asphalt concrete at an asphalt mixing station.
FIG. 2 is a schematic illustration of another embodiment of the grading determination method of the present invention for simulating actual production of asphalt concrete at an asphalt mixing station.
FIG. 3 is a schematic illustration of yet another embodiment of the gradation determination method of the present invention for simulating actual production of asphalt concrete at an asphalt mixing station.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present embodiment and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present embodiment.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present embodiment, the meaning of "plurality" is at least two, for example, two, three, etc., unless explicitly defined otherwise.
In this embodiment, unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present embodiment can be understood by those of ordinary skill in the art according to the specific circumstances.
In embodiments of the invention, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
Fig. 1 to 3 show a gradation determining method for an actual production of asphalt concrete by a simulated asphalt mixing station according to the present invention, and as can be seen from the drawings, the gradation determining method for an actual production of asphalt concrete by a simulated asphalt mixing station according to the present invention includes: s110, sampling aggregate in each bin; s120, after sampling, screening aggregate in each bin to obtain grading information of the aggregate in each bin; and S130, merging the grading information into overall grading so as to realize the grading determination.
In the concrete implementation, the actual bins are sampled and screened to obtain the grading of the aggregates in each bin, after the grading of the aggregates in each bin is obtained, namely, after the information of coarse particles and fine particles and the like are obtained, the information is combined into the whole grading, so that the proportion of the aggregates with various particle sizes in the whole asphalt concrete can be obtained, the asphalt mixing station can completely reach the normal production state, the whole grading is determined after the aggregates are directly sampled, screened and combined in each bin of the asphalt mixing station, the obtained grading information is more accurate, the fluctuation of a blending proportion grading curve in the construction production process is prevented, and the fluctuation is matched with various data of a target blending proportion, and the technical problem that a large error exists in the verification of the sampling and screening result of the asphalt concrete and the production proportion in the laboratory is solved.
According to one embodiment of the invention, the grading determination method for the simulated asphalt mixing station when the simulated asphalt mixing station actually produces asphalt concrete further comprises the following steps: s210, collecting an asphalt concrete detection sample from a finished product bin in real time in the mixing process of the asphalt concrete, measuring the total mass of the asphalt concrete detection sample, and sending the total mass to an analysis module, wherein the analysis module is used for analyzing data; s220, burning the collected asphalt concrete detection sample, and separating mineral aggregates under the condition that asphalt is completely burnt; s230, screening the separated mineral aggregates step by step to obtain each level of matched mineral aggregates, measuring the quality of each level of matched mineral aggregates in real time and sending the quality of each level of matched mineral aggregates to an analysis module; s240, receiving the total mass of the asphalt concrete detection sample and the mass of each level of matched mineral aggregate in real time by an analysis module, and dividing the mass of each level of separated matched mineral aggregate by the total mass of the asphalt concrete detection sample to obtain the mass ratio of asphalt to each level of matched mineral aggregate.
In the concrete implementation, the automatic disc-by-disc online real-time detection of the oil-stone ratio and mineral aggregate grading of the asphalt concrete can be realized on the site of asphalt concrete mixing by taking the existing combustion method as a basis.
According to one embodiment of the invention, the grading determination method for the simulated asphalt mixing station in actual asphalt concrete production of the invention can further comprise the following steps: s310, building a database of material indexes, grading, oil-stone ratio, film thickness, specific surface area and mixture performance according to on-site raw materials, wherein the raw materials comprise asphalt, aggregate and mineral powder; s320, predicting and monitoring the quality of the field mixture; wherein the field mixture is formed by mixing asphalt, aggregate and mineral powder; s330, the mass of the on-site mixture is adjusted in proportion of cold material and hot material, and the mixture is mixed according to the adjusted production mixing proportion, so that the grading composition of the asphalt concrete is controlled, and the control of the mass of the asphalt concrete is completed.
According to one embodiment of the invention, the method for building the database of material index, grading, oil-stone ratio, film thickness, specific surface area and mixture property according to the raw materials on site comprises the following steps: performing performance index tests according to asphalt, aggregate and mineral powder on site; after finishing the performance index test, investigation and sampling are carried out on mineral aggregate, the grading composition condition of each mineral aggregate is analyzed, the grading is randomly synthesized according to the composition proportion of the target mixing proportion or the production mixing proportion, the grading composition range of the asphalt concrete is obtained, and the fluctuation of the synthesized grading is judged and used as the quality control basis; wherein the mineral aggregate comprises aggregate and mineral powder; according to the grading composition range, designing asphalt concrete with various typical grading compositions, and testing the dosage performance of asphalt concrete with different grading compositions to obtain the asphalt concrete performance with different asphalt dosage and different grading compositions; and calculating the thickness of the asphalt film according to the results of the performance index test, the asphalt concrete performance test results of different asphalt dosages and different grading compositions, and the test results of the target blending ratio and the production blending ratio, and establishing a material index, film thickness, grading and mixture performance database.
According to one embodiment of the present invention, the performance index may include: testing conventional indexes of density, penetration, softening point, ductility, viscosity and solubility of asphalt; the density of the on-site aggregate and mineral powder and the screening group obtained by screening according to the density; the shape composition of the screening grouping aggregate is analyzed through screening test; dividing the sieve group into analysis units according to the shape proportion of the sieve group aggregate, numbering and recording the quality; the surface texture and texture of the analysis unit were tested.
According to one embodiment of the invention, the calculating the asphalt film thickness creates a database of material index, film thickness, grading and mix properties, comprising: testing conventional indexes of density, penetration, softening point, ductility, viscosity and solubility of asphalt; the density of the on-site aggregate and mineral powder and the screening group obtained by screening according to the density; analyzing the shape composition of the sieve grouping aggregate; dividing the sieve group into analysis units according to the shape proportion of the sieve group aggregate, numbering and recording the quality; testing the surface texture and texture of the analysis unit; adhesion or interaction tests analyze the interaction of mineral aggregate with asphalt; according to the screening result, grading synthesis is carried out according to the production mixing ratio, and the synthesis result is analyzed for optimization; analyzing relevant variability indexes according to the grading optimization result, and analyzing the specific surface area by adopting a specific surface area calculation method; calculating asphalt volume of the unit quantity mixture according to asphalt consumption and density indexes; the surface area of the mineral aggregate in the unit amount of the mixture is calculated on the basis of the specific surface area.
In summary, the invention sets up a quality control database, proposes a control program, quantifies the index of quality control, and solves the blindness in the quality control process.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "manner," "particular modes," or "some modes," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or mode is included in at least one embodiment or mode of the embodiments of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or manner. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or ways. Furthermore, various embodiments or modes and features of various embodiments or modes described in this specification can be combined and combined by those skilled in the art without mutual conflict.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The grading determination method for simulating actual production of asphalt concrete by an asphalt mixing station is characterized by comprising the following steps of:
sampling aggregate in each bin;
after sampling, screening aggregates in each bin to obtain grading information of the aggregates in each bin;
the grading information is combined into an overall grading to achieve the grading determination.
2. The gradation determination method for actual production of asphalt concrete at a simulated asphalt mixing station as claimed in claim 1, further comprising:
In the mixing process of asphalt concrete, an asphalt concrete detection sample is collected in real time from a finished product bin, the total mass of the asphalt concrete detection sample is measured and sent to an analysis module, and the analysis module is used for analyzing data.
3. The gradation determining method for actual production of asphalt concrete at a simulated asphalt mixing station according to claim 2, wherein the collected asphalt concrete test sample is burned, and mineral aggregate is separated under the condition that asphalt is completely burned.
4. The grading determination method for actual asphalt concrete production at a simulated asphalt mixing station according to claim 3, wherein the separated mineral aggregates are subjected to step-by-step screening to obtain the graded mineral aggregates, and the quality of the graded mineral aggregates is measured in real time and sent to an analysis module.
5. The grading determination method for actual asphalt concrete production at a simulated asphalt mixing station according to claim 4, wherein the analysis module receives the total mass of the asphalt concrete detection sample and the mass of each grade of the mineral aggregate in real time, and divides the mass of each grade of the mineral aggregate after separation by the total mass of the asphalt concrete detection sample to obtain the mass ratio of asphalt to each grade of the mineral aggregate.
6. The gradation determination method for actual production of asphalt concrete at a simulated asphalt mixing station according to any one of claims 1 to 5, further comprising:
and establishing a database of material indexes, film thickness, gradation, oil-stone ratio, film thickness, specific surface area and mixture performance according to on-site raw materials, wherein the raw materials comprise asphalt, aggregate and mineral powder.
7. The method for determining the grading of the simulated asphalt mixing station for actually producing asphalt concrete according to claim 6, wherein the step of creating a database of material index, film thickness, grading, oil-to-stone ratio, film thickness, specific surface area and mixture property according to the raw materials on site comprises the steps of:
Performing performance index tests according to asphalt, aggregate and mineral powder on site;
After finishing the performance index test, investigation and sampling are carried out on mineral aggregate, the grading composition condition of each mineral aggregate is analyzed, the grading is randomly synthesized according to the composition proportion of the target mixing proportion or the production mixing proportion, the grading composition range of the asphalt concrete is obtained, and the fluctuation of the synthesized grading is judged and used as the quality control basis; wherein the mineral aggregate comprises aggregate and mineral powder;
according to the grading composition range, designing asphalt concrete with various typical grading compositions, and testing the dosage performance of asphalt concrete with different grading compositions to obtain the asphalt concrete performance with different asphalt dosage and different grading compositions;
And calculating the thickness of the asphalt film according to the results of the performance index test, the asphalt concrete performance test results of different asphalt dosages and different grading compositions, and the test results of the target blending ratio and the production blending ratio, and establishing a material index, film thickness, grading and mixture performance database.
8. The method for determining the gradation in actual asphalt concrete production at a simulated asphalt mixing station according to claim 7, wherein said performance metrics comprise:
Testing conventional indexes of density, penetration, softening point, ductility, viscosity and solubility of asphalt;
the density of the on-site aggregate and mineral powder and the screening group obtained by screening according to the density;
The shape composition of the screening grouping aggregate is analyzed through screening test;
dividing the sieve group into analysis units according to the shape proportion of the sieve group aggregate, numbering and recording the quality;
the surface texture and texture of the analysis unit were tested.
9. The method for determining the gradation of asphalt concrete actually produced by a simulated asphalt mixing station according to claim 7, wherein said calculating the thickness of asphalt film and creating a database of material index, film thickness, gradation and mix properties comprises:
Testing conventional indexes of density, penetration, softening point, ductility, viscosity and solubility of asphalt;
the density of the on-site aggregate and mineral powder and the screening group obtained by screening according to the density;
Analyzing the shape composition of the sieve grouping aggregate;
dividing the sieve group into analysis units according to the shape proportion of the sieve group aggregate, numbering and recording the quality;
testing the surface texture and texture of the analysis unit;
Adhesion or interaction tests analyze the interaction of mineral aggregate with asphalt;
according to the screening result, grading synthesis is carried out according to the production mixing ratio, and the synthesis result is analyzed for optimization;
analyzing relevant variability indexes according to the grading optimization result, and analyzing the specific surface area by adopting a specific surface area calculation method;
calculating asphalt volume of the unit quantity mixture according to asphalt consumption and density indexes;
the surface area of the mineral aggregate in the unit amount of the mixture is calculated on the basis of the specific surface area.
10. The method for determining the gradation in actual asphalt concrete production at a simulated asphalt mixing plant according to claim 6, further comprising, after said creating a database of material index, film thickness, gradation and mix properties from raw materials in situ:
predicting and monitoring the quality of the field mixture; wherein the field mixture is formed by mixing asphalt, aggregate and mineral powder;
And (3) adjusting the proportion of cold materials to hot materials of the field mixture, mixing according to the adjusted production mixing proportion, and controlling the grading composition of the asphalt concrete to control the quality of the asphalt concrete.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410208522.4A CN118262835A (en) | 2024-02-26 | 2024-02-26 | Graded determining method for simulating actual production of asphalt concrete by asphalt mixing station |
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| CN202410208522.4A CN118262835A (en) | 2024-02-26 | 2024-02-26 | Graded determining method for simulating actual production of asphalt concrete by asphalt mixing station |
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