CN116161901A - Durable high-modulus asphalt mixture and preparation method thereof - Google Patents
Durable high-modulus asphalt mixture and preparation method thereof Download PDFInfo
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- CN116161901A CN116161901A CN202310149778.8A CN202310149778A CN116161901A CN 116161901 A CN116161901 A CN 116161901A CN 202310149778 A CN202310149778 A CN 202310149778A CN 116161901 A CN116161901 A CN 116161901A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/08—Apparatus for transporting and heating or melting asphalt, bitumen, tar, or the like
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
- C04B18/167—Recycled materials, i.e. waste materials reused in the production of the same 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
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1059—Controlling the operations; Devices solely for supplying or proportioning the ingredients
- E01C19/1068—Supplying or proportioning the ingredients
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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
- G16C20/00—Chemoinformatics, i.e. ICT specially adapted for the handling of physicochemical or structural data of chemical particles, elements, compounds or mixtures
- G16C20/30—Prediction of properties of chemical compounds, compositions or mixtures
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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
- C04B2111/00017—Aspects relating to the protection of the environment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
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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
Abstract
The invention discloses a durable high-modulus asphalt mixture and a preparation method thereof, and belongs to the technical field of asphalt mixtures. Screening test is carried out on new materials, extraction screening test is carried out on coarse and fine milling materials respectively to obtain asphalt content and screening passing rate, RAP blending amount is determined, according to French asphalt mixture design concept, a grading is optimized, the rotation compaction test is carried out by selecting an oil-stone ratio in combination with previous practical engineering application experience, compaction characteristics of the mixture are determined, whether rotation compaction test results such as void ratio and the like meet standard requirements is obtained, therefore, optimal grading and design total oil-stone ratio are determined, according to the oil-stone ratio of the extraction results of the coarse and fine milling materials, the oil-stone ratio of the milling materials in the designed asphalt mixture is obtained through synthetic calculation, and then the addition amount of new asphalt can be obtained according to the total design oil-stone ratio; and preparing asphalt mixture according to the standard requirements, and then verifying the road performance of the mixture to obtain the durable high-modulus reclaimed asphalt mixture meeting the road requirements.
Description
Technical Field
The invention relates to the technical field of asphalt mixtures, in particular to a durable high-modulus asphalt mixture and a preparation method thereof.
Background
The asphalt mixture is a composite material, and mainly comprises asphalt, coarse aggregate, fine aggregate, mineral powder, polymer and wood cellulose; these materials of different mass and quantity are mixed to form different structures and have different mechanical properties.
Patent number CN202210260226.X discloses a method for designing the mixing ratio of hot in-place recycled asphalt mixture, and evaluates the basic conditions of an original road surface, wherein the basic conditions of the original road surface comprise the structure and material conditions of the original road surface, the maintenance history conditions of the original road surface and the distribution conditions of rut disease sections of the original road surface; evaluating the original road surface RAP performances of different road sections, wherein the original road surface RAP performances comprise mineral aggregate gradation in the original road surface RAP, ageing asphalt content in the original road surface RAP and ageing asphalt penetration in the original road surface RAP; judging whether the original road surface RAP can be constructed by adopting an in-situ heat regeneration technology or not by utilizing the content of the aged asphalt in the original road surface RAP and the evaluation result of the penetration of the aged asphalt in the original road surface RAP; if the original road surface RAP can be constructed by adopting an in-situ heat regeneration technology, the construction units of the maintenance road section are divided according to the original road surface structure and material condition, the original road surface maintenance history condition and the original road surface rut disease section distribution condition.
The patent solves the problem that the RAP distribution of a maintenance road section and the variability of material composition form an in-situ heat regenerated asphalt mixture mix proportion design; however, it cannot be examined whether basic performance indexes such as penetration, softening point, viscosity and the like of the integral cementing material meet the standard requirements, so that whether the old material regeneration can be realized by adopting the high-modulus technical scheme is determined.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide a durable high-modulus asphalt mixture and a preparation method thereof, which are used for solving the problems in the background technology.
Technical proposal
A durable high-modulus asphalt mixture comprises coarse aggregate, fine aggregate, coarse and fine milled mineral aggregate, mineral powder and cementing material.
The cement is prepared from 80% of coarse aggregate, 15% of fine aggregate, 3% of coarse and fine milling mineral aggregate, 1.8% of mineral powder and 0.2% of cementing material.
The cement is prepared from 78% of coarse aggregate, 16% of fine aggregate, 3% of coarse and fine milling mineral aggregate, 2.8% of mineral powder and 0.2% of cementing material.
The cement is prepared from 80% of coarse aggregate, 15% of fine aggregate, 3% of coarse and fine milling mineral aggregate, 1.5% of mineral powder and 0.5% of cementing material.
A preparation method of a durable high-modulus asphalt mixture comprises the following steps:
s1: evaluating the prepared raw materials;
s2: recovering asphalt mixture for performance evaluation;
s3: grading design and performance verification of the reclaimed asphalt mixture;
s4: the void fraction, temperature, and penetration and dynamic viscosity of the composite cement were evaluated.
Preferably, in the step S4, the penetration of the composite cementing material is 15-25dmm, the dynamic viscosity at 60 degrees is not less than 2000Pa.s, and the void ratio is not more than 4%; in the thermal regeneration engineering, because the old asphalt has different ageing degrees and different blending amounts, the ageing degree and the blending amount of the old asphalt are important basis for selecting and using asphalt regenerants for recovering the service performance of the aged asphalt, and have great influence on the design and construction of regenerated mixtures. The high modulus regeneration method is adopted, the aged asphalt is regarded as low-grade asphalt to exist and be utilized, regeneration recovery is not needed, only the whole cementing material dosage is needed to be considered in adding new asphalt, the RAP mixing amount in the high modulus regeneration mixture is higher, and the old asphalt content is relatively improved, so that the influence of the aged asphalt on the performance of the regeneration mixture is necessary to be studied, and the cementing material compounding scheme is optimized according to the research result.
Preferably, in the step S4, the heating temperature is 185 to 200 ℃; the heating temperature of RAP is 100-140 ℃; the heating temperature of asphalt is 165-175 ℃; the mixing temperature is 188-193 ℃; the compaction temperature is 179-183 ℃, the matrix asphalt is compounded with low-grade asphalt after being aged to different degrees, the proportion of new asphalt and old asphalt in the design of the mixing proportion of the high-modulus regenerated mixture is referenced, and whether the basic performance indexes such as penetration, softening point, viscosity and the like of the integral cementing material meet the standard requirement is inspected, so that whether the regeneration of the old material can be realized by adopting the high-modulus technical scheme is determined.
Preferably, the new asphalt in the step S4 is prepared from road petroleum asphalt and hard particles according to 75 percent: mixing 25% of the materials, calculating the oil-stone ratio, and measuring the density of various mineral materials, the relative density and viscosity of asphalt; the mixing temperature is controlled to be 188-193 ℃; screening test is carried out on the new materials, extraction screening test is carried out on the coarse and fine milling materials respectively to obtain asphalt content and screening passing rate, RAP blending amount is determined, according to the French asphalt mixture design concept, a grading is optimized, the oil-stone ratio is selected for rotary compaction test in combination with the practical engineering application experience in the past, the compaction characteristics of the mixture are determined, whether the rotary compaction test results such as void ratio and the like meet the standard requirement or not is obtained, and therefore the optimal grading and the design total oil-stone ratio are determined.
Preferably, the 26.5mm sieve mesh is set as the maximum particle size, the 19mm sieve mesh is set as the maximum nominal particle size, and the grading range is as follows, in terms of the passing percentage of the key sieve mesh mineral aggregate: 26.5mm:100%;19mm:90% -100%; 16mm:78% -94%; 13.2mm:65% -85%; 9.5mm:54% -74%; 4.75mm:35% -55%; 2.36mm:23% -39%; 1.18mm:14% -28%; 0.6mm:9% -20%; 0.3mm:6% -15%; 0.15mm:4% -11%; 0.0.75mm:3% -7% of asphalt mixture is prepared according to the standard requirements, and then the road performance of the mixture is verified to obtain the durable high-modulus reclaimed asphalt mixture meeting the road requirements.
Advantageous effects
Compared with the prior art, the invention has the advantages that:
1. the high modulus regeneration method is adopted, the aged asphalt is regarded as low-grade asphalt to exist and be utilized, regeneration recovery is not needed, only the whole cementing material dosage is needed to be considered in adding new asphalt, the RAP mixing amount in the high modulus regeneration mixture is higher, and the old asphalt content is relatively improved, so that the influence of the aged asphalt on the performance of the regeneration mixture is necessary to be studied, and the cementing material compounding scheme is optimized according to the research result.
2. And (3) compounding the matrix asphalt after ageing to different degrees with low-grade asphalt, and referring to the proportion of new asphalt to old asphalt in the design of the mixing proportion of the high-modulus regenerated mixture to examine whether basic performance indexes such as penetration, softening point, viscosity and the like of the integral cementing material meet the standard requirements or not, so as to determine whether the old material can be regenerated by adopting the high-modulus technical scheme.
3. Measuring the density of various mineral aggregates, the relative density and viscosity of asphalt; the mixing temperature is controlled to be 188-193 ℃; screening test is carried out on the new materials, extraction screening test is carried out on the coarse and fine milling materials respectively to obtain asphalt content and screening passing rate, RAP blending amount is determined, according to the French asphalt mixture design concept, a grading is optimized, the oil-stone ratio is selected for rotary compaction test in combination with the practical engineering application experience in the past, the compaction characteristics of the mixture are determined, whether the rotary compaction test results such as void ratio and the like meet the standard requirement or not is obtained, and therefore the optimal grading and the design total oil-stone ratio are determined.
4. According to the oil-stone ratio of the extraction results of the coarse milling material and the fine milling material, obtaining the oil-stone ratio of the milling material in the designed asphalt mixture through synthesis calculation, and then obtaining the addition amount of new asphalt according to the total designed oil-stone ratio; and preparing asphalt mixture according to the standard requirements, and then verifying the road performance of the mixture to obtain the durable high-modulus reclaimed asphalt mixture meeting the road requirements.
Drawings
FIG. 1 is a diagram showing the steps for preparing a durable high-modulus asphalt mixture according to the present invention.
Detailed Description
In the description of the present invention, 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", 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 invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; 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 above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1, the present invention provides a technical solution:
a durable high-modulus asphalt mixture comprises coarse aggregate, fine aggregate, coarse and fine milled mineral aggregate, mineral powder and cementing material.
80% of coarse aggregate, 15% of fine aggregate, 3% of coarse and fine milling mineral aggregate, 1.8% of mineral powder and 0.2% of cementing material, and the whole zero-integer degree of the mixture is higher.
78% of coarse aggregate, 16% of fine aggregate, 3% of coarse and fine milling mineral aggregate, 2.8% of mineral powder and 0.2% of cementing material, and the mixture can inhibit alkali aggregate reaction, reduce hydration heat and reduce early temperature cracks of a concrete structure.
80% of coarse aggregate, 15% of fine aggregate, 3% of coarse and fine milling mineral aggregate, 1.5% of mineral powder and 0.5% of cementing material, and the mixture can be used for cementing the mixture.
A preparation method of a durable high-modulus asphalt mixture comprises the following steps:
s1: evaluating the prepared raw materials;
s2: recovering asphalt mixture for performance evaluation;
s3: grading design and performance verification of the reclaimed asphalt mixture;
s4: the void fraction, temperature, and penetration and dynamic viscosity of the composite cement were evaluated.
In the step S4, the penetration of the composite cementing material is 15-25dmm, the dynamic viscosity at 60 ℃ is not less than 2000Pa.s, and the void ratio is not more than 4%; in the thermal regeneration engineering, because the old asphalt has different ageing degrees and different blending amounts, the ageing degree and the blending amount of the old asphalt are important basis for selecting and using asphalt regenerants for recovering the service performance of the aged asphalt, and have great influence on the design and construction of regenerated mixtures. The high modulus regeneration method is adopted, the aged asphalt is regarded as low-grade asphalt to exist and be utilized, regeneration recovery is not needed, only the whole cementing material dosage is needed to be considered in adding new asphalt, the RAP mixing amount in the high modulus regeneration mixture is higher, and the old asphalt content is relatively improved, so that the influence of the aged asphalt on the performance of the regeneration mixture is necessary to be studied, and the cementing material compounding scheme is optimized according to the research result.
In the step S4, the heating temperature is 185-200 ℃; the heating temperature of RAP is 100-140 ℃; the heating temperature of asphalt is 165-175 ℃; the mixing temperature is 188-193 ℃; the compaction temperature is 179-183 ℃, the matrix asphalt is compounded with low-grade asphalt after being aged to different degrees, the proportion of new asphalt and old asphalt in the design of the mixing proportion of the high-modulus regenerated mixture is referenced, and whether the basic performance indexes such as penetration, softening point, viscosity and the like of the integral cementing material meet the standard requirement is inspected, so that whether the regeneration of the old material can be realized by adopting the high-modulus technical scheme is determined.
In the step S4, the new asphalt is prepared from road petroleum asphalt and hard particles according to the proportion of 75 percent: mixing 25% of the materials, calculating the oil-stone ratio, and measuring the density of various mineral materials, the relative density and viscosity of asphalt; the mixing temperature is controlled to be 188-193 ℃; screening test is carried out on the new materials, extraction screening test is carried out on the coarse and fine milling materials respectively to obtain asphalt content and screening passing rate, RAP blending amount is determined, according to the French asphalt mixture design concept, a grading is optimized, the oil-stone ratio is selected for rotary compaction test in combination with the practical engineering application experience in the past, the compaction characteristics of the mixture are determined, whether the rotary compaction test results such as void ratio and the like meet the standard requirement or not is obtained, and therefore the optimal grading and the design total oil-stone ratio are determined.
Setting 26.5mm sieve pores as maximum particle size, setting 19mm sieve pores as maximum nominal particle size, and the grading range of the sieve pores is as follows, based on the passing percentage of the key sieve pore mineral aggregate: 26.5mm:100%;19mm:90% -100%; 16mm:78% -94%; 13.2mm:65% -85%; 9.5mm:54% -74%; 4.75mm:35% -55%; 2.36mm:23% -39%; 1.18mm:14% -28%; 0.6mm:9% -20%; 0.3mm:6% -15%; 0.15mm:4% -11%; 0.0.75mm:3% -7% of asphalt mixture is prepared according to the standard requirements, and then the road performance of the mixture is verified to obtain the durable high-modulus reclaimed asphalt mixture meeting the road requirements.
To sum up: in the thermal regeneration engineering, because the old asphalt has different ageing degrees and different blending amounts, the ageing degree and the blending amount of the old asphalt are important basis for selecting and using asphalt regenerants for recovering the service performance of the aged asphalt, and have great influence on the design and construction of regenerated mixtures. The high modulus regeneration method is adopted, the aged asphalt is regarded as low-grade asphalt to exist and be utilized, regeneration recovery is not needed, only the whole cementing material dosage is needed to be considered in adding new asphalt, the RAP doping amount in the high modulus regeneration mixture is higher, and the old asphalt content is relatively improved, so that the influence of the old asphalt aging on the performance of the regeneration mixture is necessary to be studied, and the cementing material compounding scheme is optimized according to the research result;
compounding the matrix asphalt after ageing to different degrees with low-grade asphalt, and referring to the proportion of new asphalt to old asphalt in the design of the mixing proportion of the high-modulus regenerated mixture, and checking whether basic performance indexes such as penetration, softening point, viscosity and the like of the integral cementing material meet the standard requirements or not, so as to determine whether the old material can be regenerated by adopting the high-modulus technical scheme;
measuring the density of various mineral aggregates, the relative density and viscosity of asphalt; the mixing temperature is controlled to be 188-193 ℃; screening test is carried out on the new materials, extraction screening test is carried out on the coarse and fine milling materials respectively to obtain asphalt content and screening passing rate, RAP blending amount is determined, according to the French asphalt mixture design concept, a grading is optimized, the oil-stone ratio is selected for rotary compaction test in combination with the practical engineering application experience in the past, the compaction characteristics of the mixture are determined, whether the rotary compaction test results such as void ratio and the like meet the standard requirement or not is obtained, and therefore the optimal grading and the design total oil-stone ratio are determined.
According to the oil-stone ratio of the extraction results of the coarse milling material and the fine milling material, obtaining the oil-stone ratio of the milling material in the designed asphalt mixture through synthesis calculation, and then obtaining the addition amount of new asphalt according to the total designed oil-stone ratio; and preparing asphalt mixture according to the standard requirements, and then verifying the road performance of the mixture to obtain the durable high-modulus reclaimed asphalt mixture meeting the road requirements.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present invention, and are not intended to limit the invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The durable high-modulus asphalt mixture is characterized by comprising coarse aggregate, fine aggregate, coarse and fine milled mineral aggregate, mineral powder and cementing material.
2. The durable high modulus asphalt mixture according to claim 1, wherein: the cement is prepared from 80% of coarse aggregate, 15% of fine aggregate, 3% of coarse and fine milling mineral aggregate, 1.8% of mineral powder and 0.2% of cementing material.
3. The durable high modulus asphalt mixture according to claim 1, wherein: the cement is prepared from 78% of coarse aggregate, 16% of fine aggregate, 3% of coarse and fine milling mineral aggregate, 2.8% of mineral powder and 0.2% of cementing material.
4. The durable high modulus asphalt mixture according to claim 1, wherein: the cement is prepared from 80% of coarse aggregate, 15% of fine aggregate, 3% of coarse and fine milling mineral aggregate, 1.5% of mineral powder and 0.5% of cementing material.
5. A preparation method of a durable high-modulus asphalt mixture is characterized by comprising the following steps: the method comprises the following steps:
s1: evaluating the prepared raw materials;
s2: recovering asphalt mixture for performance evaluation;
s3: grading design and performance verification of the reclaimed asphalt mixture;
s4: the void fraction, temperature, and penetration and dynamic viscosity of the composite cement were evaluated.
6. The method for preparing the durable high-modulus asphalt mixture according to claim 5, wherein the method comprises the following steps: in the step S4, the penetration of the composite cementing material is 15-25dmm, the dynamic viscosity at 60 degrees is not less than 2000Pa.s, and the void ratio is less than or equal to 4%.
7. The method for preparing the durable high-modulus asphalt mixture according to claim 5, wherein the method comprises the following steps: in the step S4, the heating temperature is 185-200 ℃; the heating temperature of RAP is 100-140 ℃; the heating temperature of asphalt is 165-175 ℃; the mixing temperature is 188-193 ℃; compacting temperature is 179-183 ℃.
8. The method for preparing the durable high-modulus asphalt mixture according to claim 5, wherein the method comprises the following steps: in the step S4, the new asphalt is prepared from road petroleum asphalt and hard particles according to the proportion of 75 percent: the mixture was blended at a ratio of 25% and the total was calculated as the oil-stone ratio.
9. The method for preparing the durable high-modulus asphalt mixture according to claim 5, wherein the method comprises the following steps: setting 26.5mm sieve pores as maximum particle size, setting 19mm sieve pores as maximum nominal particle size, and the grading range of the sieve pores is as follows, based on the passing percentage of the key sieve pore mineral aggregate: 26.5mm:100%;19mm:90% -100%; 16mm:78% -94%; 13.2mm:65% -85%; 9.5mm:54% -74%; 4.75mm:35% -55%; 2.36mm:23% -39%; 1.18mm:14% -28%; 0.6mm:9% -20%; 0.3mm:6% -15%; 0.15mm:4% -11%; 0.0.75mm:3 to 7 percent.
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