CN110540383A - Regenerated asphalt mortar and method for preparing asphalt mixture by using same - Google Patents
Regenerated asphalt mortar and method for preparing asphalt mixture by using same Download PDFInfo
- Publication number
- CN110540383A CN110540383A CN201810532923.XA CN201810532923A CN110540383A CN 110540383 A CN110540383 A CN 110540383A CN 201810532923 A CN201810532923 A CN 201810532923A CN 110540383 A CN110540383 A CN 110540383A
- Authority
- CN
- China
- Prior art keywords
- asphalt
- mortar
- mixture
- aggregate
- regenerated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
-
- 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
- C04B2111/00482—Coating or impregnation materials
-
- 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
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a regenerated asphalt mastic sand and a method for preparing an asphalt mixture by using the same, belongs to the technical field of road engineering, and particularly relates to a regenerated asphalt mastic sand and a method for preparing an asphalt mixture by using the same. In particular to a preparation method thereof, which comprises the following steps: (1) a preparation method of reclaimed asphalt mortar; (2) a method for preparing asphalt mixture by adopting reclaimed asphalt mortar. The regenerated asphalt mixture prepared by the method has the advantages of simple process, controllable quality, high effective utilization rate of the regenerant, high mutual permeation, fusion and reaction formation degree of the new asphalt and the aged asphalt in the old material, uniform coating effect of the asphalt membrane on the surfaces of the new and old aggregates and no waste material. The comprehensive performance of the produced recycled asphalt mixture, the old asphalt, the asphalt mortar containing the old asphalt and the asphalt mixture reaches the pavement performance level of completely adopting new materials.
Description
Technical Field
The invention belongs to the technical field of road engineering, and particularly relates to reclaimed asphalt mastic sand and a method for preparing an asphalt mixture by using the same.
Background
the plant mixing heat regeneration technology of the asphalt pavement milling material is the asphalt pavement regeneration method which is most widely applied in the world at present, and is suitable for the regeneration and the utilization of the old asphalt pavement milling material under various conditions. Compared with the traditional maintenance mode of the asphalt pavement, the method can save a large amount of raw materials such as asphalt, gravel and the like, save engineering investment, and is beneficial to treating waste materials and protecting the environment, thereby having remarkable economic benefit, social benefit and environmental benefit.
in the traditional plant-mixed hot recycling process, an old asphalt mixture (RAP for short) and new aggregates are heated independently, then the RAP and the new aggregates are mixed in a mixing pot, and then new asphalt (or the new asphalt and a recycling agent) is added into the mixing pot for mixing at one time to obtain a recycled asphalt mixture finished product which is directly used for pavement. It is known that in the regenerated asphalt mixture, only after the new asphalt (or the new asphalt and the regenerant) and the aged asphalt in the old material are mutually permeated, exchanged and fused, a continuous and consistent cementing material is formed and uniformly coated on the new aggregate and the old material, the regenerated asphalt mixture with stable form and excellent road performance can be obtained.
However, the traditional process does not consider that the mutual reaction and close combination of the new asphalt and the aged asphalt in the old material can be fully completed under the specific temperature and time conditions, so that on one hand, the degree of the new aggregate and the old material in the mixed regenerated mixture are different from each other, the new aggregate is often thin in asphalt film, the old material is thick in asphalt film, the uniformity of the mixture is poor, the new aggregate with larger particle size is often still not fully wrapped with the asphalt after being mixed, and the phenomenon of white material is presented; on the other hand, the new asphalt and the aged asphalt in the old material are not completely fused and evenly coated on the new and old aggregates, so that the road performance of the aged asphalt cannot be fully improved and regenerated, and the two kinds of asphalt respectively play the original characteristics in a mixture system and cannot form a unified whole. Thereby seriously affecting the comprehensive road performance of the regenerated asphalt mixture, and particularly greatly reducing the water stability, the low-temperature crack resistance, the fatigue life and the like compared with the asphalt mixture which completely uses new materials. In addition, the regenerant is directly added into a product obtained by mixing the new aggregate and the old aggregate, and a large part of the regenerant is adsorbed and absorbed by the new aggregate and cannot play a role in regenerating aged asphalt, so that the effective utilization rate of the regenerant is reduced, and the manufacturing cost of the regenerated asphalt mixture is increased. Meanwhile, after the RAP is crushed and separated, the coarse asphalt content is low, the fine asphalt content is high, and when the coarse material and the fine material enter a heating roller to be preheated simultaneously, the coarse material and the fine material are easy to be adhered to equipment due to the existence of oil-rich fine material, so that the mixing uniformity and the production efficiency are seriously influenced.
under the background, a preparation method of a separated plant-mixed warm-hot recycled asphalt mixture is needed to be researched, the method is simple in process, good in recycling effect, high in recycling agent utilization rate, low in cost and wide in application range, the prepared plant-mixed warm-hot recycled asphalt mixture is free of white materials, the comprehensive road performance is far superior to that of the recycled asphalt mixture prepared by the traditional process, and the technical requirement of a newly-mixed asphalt mixture can be completely met.
Disclosure of Invention
Aiming at the technical defects of the traditional hot mix plant recycled asphalt mixture, the invention aims to provide a method for preparing recycled asphalt mortar by using oil-rich fine aggregate in asphalt pavement milling materials and then preparing an asphalt mixture by using the recycled asphalt mortar. The regenerated asphalt mixture prepared by the method has the advantages of simple process, controllable quality, high effective utilization rate of the regenerant, high mutual permeation, fusion and reaction formation degree of the new asphalt and the aged asphalt in the old material, uniform coating effect of the asphalt membrane on the surfaces of the new and old aggregates and no waste material. The comprehensive performance of the produced recycled asphalt mixture, the old asphalt, the asphalt mortar containing the old asphalt and the asphalt mixture reaches the pavement performance level of completely adopting new materials.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the invention provides regenerated asphalt mortar prepared from oil-rich fine aggregates in old asphalt pavement milling materials, which comprises 100 parts of oil-rich fine aggregates and 0-3 parts of asphalt regenerant by weight. The preparation method of the reclaimed asphalt mortar comprises the following steps:
(1) Crushing and separating the old asphalt pavement milling material into a lean oil coarse aggregate and an oil-rich fine aggregate, and detecting the content, the performance and the mineral aggregate gradation of the old asphalt in the oil-rich fine aggregate;
(2) Determining the type and the content of a regenerant in the reclaimed asphalt mortar according to the performance of the old asphalt detected in the step (1), so that the old asphalt can be recovered to the performance of fresh asphalt;
(3) Adding the weighed oil-rich fine aggregate and the regenerant into a mixing pot for forced stirring until the mixture is uniformly mixed;
(4) And (4) taking the product obtained in the step (3) out of the pot, storing the product in a special development cabin with stirring, developing under the conditions of specific temperature and time, and obtaining the finished product of the regenerated asphalt mortar after the development is finished.
The oil-rich fine aggregate in the step (1) refers to a part of old asphalt pavement milling and planing material, which is crushed and separated, and has a particle size of less than 4.75 mm; the lean coarse aggregate is the part of old asphalt pavement milling material with particle asphalt larger than 4.75mm after crushing and separation;
in the step (1), the content of old asphalt in the oil-rich fine aggregate is determined by adopting a combustion furnace method, and the old mineral aggregate obtained after the sample is combusted is subjected to screening and density test. The sample is extracted and separated by the Abelson method, and the penetration degree (100 g, 5s, 25 ℃) of the old asphalt obtained after separation, the softening point and the ductility are detected.
in the invention, the kinematic viscosity of the regenerant in the step (2) at 60 ℃ is (50-60000) mm 2/s;
In the invention, the development temperature in the step (4) is (40-160) DEG C (the lower limit is taken when the viscosity of the selected regenerant is low, the upper limit is taken when the viscosity of the regenerant is high), and the development time is (10-360) min.
The invention also provides a preparation method of the asphalt mixture based on the finished product of the reclaimed asphalt mastic sand, which comprises the following steps:
Step one, detecting the asphalt content and mineral aggregate gradation in the finished product of the reclaimed asphalt mortar;
Step two, determining the consumption of the reclaimed asphalt mortar which simultaneously meets the mineral aggregate gradation and the asphalt content of the target reclaimed asphalt mixture according to the detection result of the step one;
Step three, determining the dosage of coarse aggregates, fine aggregates, mineral powder and new asphalt to be supplemented in the asphalt mixture according to the test result of the step two;
step four, putting the heated and weighed coarse aggregate and fine aggregate into a mixing pot for dry mixing, and then adding the weighed finished product regenerated asphalt mortar for forced stirring;
And step five, adding the weighed fresh asphalt and mineral powder into the product obtained in the step four, and forcibly stirring to obtain the finished product of the regenerated asphalt mixture.
The asphalt content and mineral aggregate gradation in the reclaimed asphalt mortar obtained in the first step are detected according to a method (T0722-1993) in road engineering asphalt and asphalt mixture test procedure (JTG E20-2011);
In the second step of the invention, the gradation and the asphalt content of the target regenerated asphalt mixture are selected according to the requirements of technical Specification for construction of road asphalt pavements (JTG F40-2004), and the gradation design of mineral aggregate and the design of asphalt dosage are carried out to determine the blending proportion of the regenerated asphalt mortar;
The coarse aggregate in the third step of the invention can be any one of fresh coarse aggregate, a mixture of the fresh coarse aggregate and the lean-oil coarse aggregate in the pavement milling and planing material, the fine aggregate and the mineral powder are fresh materials, and the fresh asphalt can be one of heavy cross-road petroleum asphalt and polymer modified asphalt;
In the fourth step of the invention, the heating temperature of the coarse aggregate and the fine aggregate is 170-220 ℃, the dry mixing time is 5-10s, and the forced stirring time is 20-30 s;
in the fifth step of the invention, the heating temperature of the fresh asphalt is 130-185 ℃, the lower limit of the asphalt viscosity is taken as the lower limit, the upper limit of the asphalt viscosity is taken as the upper limit, the forced stirring time is 10-20s determined according to the method (T0702-2011) in road engineering asphalt and asphalt mixture test regulations (JTG E20-2011).
According to the preparation method of the recycled asphalt mixture based on the recycled asphalt mortar, the technical performance index of the prepared recycled asphalt mixture meets the technical requirement of the fresh asphalt mixture in the technical Specification for construction of the asphalt pavement of roads.
Compared with the prior art, the invention has the following advantages and beneficial effects:
The invention utilizes the lean coarse aggregate and the rich fine aggregate in the milling and planing material of the old asphalt pavement in a grading way, and separately carries out the sanding treatment on the rich fine aggregate for mixing the regenerated asphalt mixture. The defect that the old fine aggregate and the old coarse aggregate are heated together in the traditional process and are easy to adhere in a heating roller is overcome, and the production efficiency of the regenerated asphalt mixture is greatly improved;
The invention prepares the oil-rich fine aggregate in the milling and planing material of the old asphalt pavement into the reclaimed asphalt mortar by adopting a warm regeneration process, so that the performance of the reclaimed asphalt mortar reaches the level of the fresh asphalt mortar, and the 100 percent resource utilization of the oil-rich fine aggregate is realized. The lean-oil coarse aggregate is added into the regenerated asphalt mortar separately or mixed with fresh coarse aggregate to prepare asphalt mixture, so that 100% rubble utilization of the lean-oil coarse aggregate is realized;
according to the invention, the regenerant is directly added into the oil-rich fine aggregate, so that on one hand, the regenerant is beneficial to fully contacting with the aged asphalt in the old material, and the performance of the aged asphalt can be improved and regenerated to a greater extent; on the other hand, the method avoids adding the regenerant into the new aggregate and the old aggregate in the traditional method, so that a great part of the regenerant is absorbed by the new aggregate, and the effective utilization rate of the regenerant is reduced;
The method has the advantages of easy realization, high utilization rate of the aged asphalt and the regenerant, less consumption of the new asphalt, effective prevention of the occurrence of the white material in the regenerated mixture, more uniform regenerated mixture, and great improvement of the comprehensive performances of the mixture such as high-temperature stability, low-temperature crack resistance, water damage resistance, fatigue life and the like.
Drawings
FIG. 1 is a flow chart of a process for preparing reclaimed asphalt mortar in examples 1, 2 and 3 of the present invention;
Fig. 2 is a flow chart of a process for preparing a reclaimed asphalt mixture based on reclaimed asphalt mortar in examples 1, 2 and 3 of the present invention.
Detailed Description
the present invention will be further described with reference to the accompanying drawings and examples, which are provided for the purpose of illustration only and are not intended to limit the scope of the present invention.
Example 1
Examples of laboratory tests: the used asphalt road milling material (RAP material) used in the test is a material with the same source and the same particle size specification, and the final aim of the test is to restore the performance of the reclaimed asphalt mixture to the level required by the fresh polymer modified asphalt mixture AC-13, so that the restoration aim of the used asphalt in the test is fresh SBS polymer modified asphalt (I-C).
the RAP material is firstly crushed and screened into two parts of lean coarse aggregate (the particle size is larger than 4.75 mm) and rich fine aggregate (the particle size is smaller than 4.75 mm). Then, performing an asphalt content test according to a method T0735 in road engineering asphalt and asphalt mixture test procedures (JTG E20-2011), wherein the asphalt content of the oil-rich fine aggregate is 7.0%, screening the old mineral aggregate in the oil-rich fine aggregate obtained by the test, and the screening test result is shown in Table 1; the RAP material is subjected to extraction test by a method of T0726 in road engineering asphalt and asphalt mixture test procedures (JTG E20-2011), the old asphalt after the extraction test is recovered, and performance test detection is carried out, wherein the detection results are shown in Table 2.
| mesh size (mm) | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Percent by mass (%) | 100 | 76.1 | 56.6 | 44.5 | 33.1 | 25.4 | 24.2 |
| Penetration 25 deg.C (0.1 mm) | Softening Point (. degree. C.) | Yandu 5 deg.C (cm) |
| 25 | 78.5 | 10.9 |
The regenerant is TNZS-60000 type regenerant produced by Jiangsu Tiannuo road material science and technology limited company, and the kinematic viscosity at 60 ℃ is 60000mm 2/s.
According to the results of the performance tests of the old asphalt in the oil-rich fine aggregate shown in Table 2, the old asphalt was restored to the level of the fresh SBS polymer-modified asphalt in technical Specification for road asphalt pavement construction (JTG F40-2004), and it was tested that 3 parts of a recycling agent was added to 100 parts of the oil-rich fine aggregate.
The preparation method of the regenerated asphalt mortar comprises the following steps:
(1) 100 parts of oil-rich fine aggregate and 3 parts of regenerant are weighed and put into a mixing pot to be stirred until the materials are uniformly mixed, and the time is 60 seconds.
(2) Taking the product obtained in the step (1) out of a pot, dividing the product into 7 equal parts of samples (Y0, Y1, Y2, Y3, Y4, Y5 and Y6), and storing the samples in a special development cabin at 160 ℃, wherein the samples Y0 develop for 10min, the samples Y1 develop for 60min, the samples Y2 develop for 120min, the samples Y3 develop for 180min, the samples Y4 develop for 240min, the samples Y5 develop for 300min and the samples Y6 develop for 360min, so as to obtain the regenerated asphalt mortar under different conditions.
Aiming at the reclaimed asphalt mortar sample obtained by the method, the asphalt and mineral aggregate are extracted and separated by adopting an Abelson method, the penetration (100 g, 5s and 25 ℃) and softening point and ductility indexes of the separated asphalt are detected, whether the asphalt in the mortar is recovered to the technical requirements of fresh SBS polymer modified asphalt is judged, and the detection result is shown in Table 3.
TABLE 3 asphalt Performance test results in reclaimed asphalt mortar
Remarking: y0, Y1, Y2, Y3, Y4, Y5 and Y6 are samples obtained after the mixture of the oil-rich fine aggregate and the regenerant develops for 10min, 60min, 120min, 180min, 240min, 300min and 360min respectively at 160 ℃ (the same below).
the asphalt content in the reclaimed asphalt mortar is 10% by adopting a combustion method, wherein the old mineral aggregate grade composition is shown in a table 4:
| Mesh size (mm) | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| percent by mass (%) | 100 | 76.1 | 56.6 | 44.5 | 33.1 | 25.4 | 24.2 |
According to the requirements of technical Specification for road asphalt pavement construction (JTG F40-2004), the gradation range of the target regenerated asphalt mixture AC-13 is shown in Table 5, and the asphalt dosage is 4.9%.
TABLE 5 recycled asphalt mixture AC-13 grading Range
according to the asphalt content of the reclaimed asphalt mortar being 10% and the gradation detection results in table 4, the gradation range requirement and the asphalt consumption of the target reclaimed asphalt mixture AC-13 are 4.9%, and the mass percentage of the reclaimed asphalt mortar in the target reclaimed asphalt mixture AC-13 is determined to be 25% according to the requirements of technical Specification for road asphalt pavement construction (JTG F40-2004).
the coarse aggregate used in the test is fresh basalt macadam (4.75 mm-16 mm) produced by Liyang Shanpei stone factory in Hezhou city, Jiangsu province, and the grading test result is shown in Table 6.
TABLE 6 grading test results of fresh basalt coarse aggregates
The fine aggregate used in the test is fresh basalt fine aggregate (0-4.75 mm) produced by Liyang Shanpei stone factory in Hezhou city, Jiangsu province, and the grading test result is shown in Table 7.
| Mesh size (mm) | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Percent by mass (%) | 95.2 | 82.6 | 53.5 | 35.6 | 24 | 16.7 | 10.3 |
The mineral powder used in the test is limestone mineral powder produced by Liyang Shanpei stone factory in Hezhou city, Jiangsu province, and the technical index of the limestone mineral powder meets the requirements of technical Specification for road asphalt pavement construction (JTG F40-2004).
The fresh asphalt used in the test is SBS polymer modified asphalt (I-C) produced by Jiangsu Tiannuo road material science and technology company, and the technical indexes are shown in Table 8.
TABLE 8 SBS Polymer modified asphalt (I-C) test results
according to the total asphalt consumption of 4.9 percent of the target regenerated asphalt mixture, the asphalt consumption of 10 percent of the regenerated asphalt mortar and the proportion of 25 percent of the asphalt in the target regenerated asphalt mixture, the mass of the fresh SBS polymer modified asphalt (I-C) needing to be supplemented is calculated to be 2.4 percent of the mass of the target regenerated asphalt mixture.
According to the grading range requirement of the target regenerated asphalt mixture and the old material grading, the coarse aggregate grading, the fine aggregate grading and the mineral powder in the regenerated asphalt mortar, according to the grading synthesis method in technical Specification for construction of road asphalt pavement (JTG F40-2004), the coarse aggregate, the fine aggregate and the mineral powder respectively account for 63 percent, 8.5 percent and 0.56 percent of the target regenerated asphalt mixture in percentage by mass
The method comprises the following steps of determining the mass percent of the reclaimed asphalt mortar in the target reclaimed asphalt mixture according to the method, wherein the mass percent of the reclaimed asphalt mortar is 25%, the mass percent of the coarse aggregate is 63%, the mass percent of the fine aggregate is 6.5%, the mass percent of the mineral powder is 0.6%, the mass percent of the fresh asphalt is 2.4%, and the total mass is 100%, and mixing the materials by adopting the preparation method of the reclaimed asphalt mixture based on the reclaimed asphalt mortar, which comprises the following steps:
Step one, putting weighed coarse aggregate and fine aggregate heated to 220 ℃ into a mixing pot for dry mixing for 10s, then adding weighed finished product regenerated asphalt mortar and forcibly stirring for 30 s;
And step two, adding the weighed fresh asphalt and mineral powder into the product obtained in the step one, and forcibly stirring for 20s to obtain the finished product of the regenerated asphalt mixture.
For the regenerated asphalt mixture AC-13 samples prepared based on the regenerated asphalt mortar Y0, Y1, Y2, Y3, Y4, Y5 and Y6, after the test pieces were molded indoors, high-temperature performance (marshall stability test, dynamic stability test), low-temperature performance (low-temperature bending test), water stability (marshall residual stability test, freeze-thaw splitting test) and fatigue life (four-point bending trabecular fatigue life test) were evaluated, and the test results are shown in tables 9, 10, 11 and 12, respectively.
| Detecting the index | Y0 | Y1 | Y2 | Y3 | Y4 | Y5 | Y6 |
| Marshall stability (KN) | 12.43 | 12.71 | 13.25 | 14.02 | 14.53 | 14.68 | 14.76 |
| Dynamic stability (times/mm) | 4688.5 | 4709.7 | 5350.1 | 5641.2 | 5831.4 | 6086.9 | 6099.8 |
Remarking: the Marshall stability of the fresh SBS polymer modified asphalt mixture AC-13 is not less than 8KN and the dynamic stability is not less than 2800 times/mm as required by the technical Specification for road asphalt pavement construction JTG F40-2004 (hereinafter referred to as the Specification).
| Detecting the index | Y0 | Y1 | Y2 | Y3 | Y4 | Y5 | Y6 |
| Maximum bending strain at failure (mu epsilon) | 2515.7 | 2609.2 | 2653.1 | 2873.5 | 2680.0 | 2650.2 | 2560.4 |
remarking: the test temperature is-10 ℃, and the specification requirement is not less than 2500 mu epsilon.
| detecting the index | Y0 | Y1 | Y2 | Y3 | Y4 | Y5 | Y6 |
| Marshall residual stability ratio (%) | 85.4 | 86.8 | 87.3 | 89.5 | 91.7 | 92.2 | 90.1 |
| freeze-thaw split strength ratio (%) | 80.7 | 81.2 | 83.6 | 84.9 | 85.0 | 85.0 | 83.9 |
Remarking: the specification requires that the marshall residual stability ratio be no less than 85% and the freeze-thaw split strength ratio be no less than 80%.
| Detecting the index | Y0 | Y1 | Y2 | Y3 | Y4 | Y5 | Y6 |
| Four-point bending fatigue life (times) | 6570 | 8309 | 8843 | 9105 | 9361 | 9114 | 8756 |
Remarking: the test temperature was 15 ℃, the target strain was 600. mu. ε, the loading frequency was 10HZ, and the test termination condition was 50%.
Example 2
Examples of laboratory tests: the used asphalt road milling material (RAP material) used in the test is a material with the same source and the same particle size specification, and the final aim of the test is to restore the performance of the reclaimed asphalt mixture to the level required by the fresh heavy traffic asphalt mixture AC-13, so that the restoration target of the used asphalt in the test is heavy traffic road petroleum asphalt AH-70.
the RAP material is firstly crushed and screened into two parts of lean coarse aggregate (the particle size is larger than 4.75 mm) and rich fine aggregate (the particle size is smaller than 4.75 mm). Then, performing an asphalt content test according to a method T0735 in road engineering asphalt and asphalt mixture test procedures (JTG E20-2011), wherein the asphalt content of the oil-rich fine aggregate is 7.0%, screening the old mineral aggregate in the oil-rich fine aggregate obtained by the test, and the screening test result is shown in Table 13; the RAP material is subjected to extraction test by a method of T0726 in road engineering asphalt and asphalt mixture test specification (JTG E20-2011), the old asphalt after the extraction test is recovered, and performance test detection is carried out, wherein the detection results are shown in Table 14.
| mesh size (mm) | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Percent by mass (%) | 100 | 76.1 | 56.6 | 44.5 | 33.1 | 25.4 | 24.2 |
| Penetration 25 deg.C (0.1 mm) | Softening Point (. degree. C.) | Yandu 15 deg.C (cm) |
| 25 | 78.5 | 42.3 |
The regenerant is TNZS-50 type regenerant produced by Jiangsu Tiannuo road material science and technology limited company, and the kinematic viscosity at 60 ℃ is 60mm 2/s.
According to the results of the performance tests of the old asphalt in the oil-rich fine aggregate shown in Table 14, the old asphalt was restored to the technical level of fresh and heavy traffic road petroleum asphalt AH-70 in technical Specification for road asphalt pavement construction (JTG F40-2004), and it was tested that 1.2 parts of a recycling agent was added to 100 parts of the oil-rich fine aggregate.
The preparation method of the regenerated asphalt mortar comprises the following steps:
(1) 100 parts of oil-rich fine aggregate and 1.2 parts of regenerant are weighed and put into a mixing pot to be stirred until the materials are uniformly mixed, and the time is 35 seconds.
(2) Taking the product obtained in the step (1) out of a pot, dividing the product into 7 equal parts of samples (H0, H1, H2, H3, H4, H5 and H6), and storing the samples in a special development cabin at 40 ℃, wherein the samples are subjected to development of H0 for 10min, development of H1 for 60min, development of H2 for 120min, development of H3 for 180min, development of H4 for 240min, development of H5 for 300min and development of H6 for 360min, so as to obtain the regenerated asphalt mortar under different conditions.
Aiming at the reclaimed asphalt mortar sample obtained by the method, the asphalt and mineral aggregate are extracted and separated by adopting an Abelson method, the penetration (100 g, 5s and 25 ℃) and softening point and ductility indexes of the separated asphalt are detected, the technical requirement of judging whether the asphalt in the mortar is recovered to fresh heavy traffic channel petroleum asphalt AH-70 is met, and the detection result is shown in Table 15.
TABLE 15 results of asphalt property test in reclaimed asphalt mortar
Remarking: h0, H1, H2, H3, H4, H5 and H6 are samples obtained after the mixture of the oil-rich fine aggregate and the regenerant develops for 10min, 60min, 120min, 180min, 240min, 300min and 360min respectively at 40 ℃ (the same below).
The asphalt content in the reclaimed asphalt mortar is 7.84 percent by adopting a combustion method, wherein the old mineral aggregate grade is shown in a table 16:
| Mesh size (mm) | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Percent by mass (%) | 100 | 76.1 | 56.6 | 44.5 | 33.1 | 25.4 | 24.2 |
According to the requirements of technical Specification for road asphalt pavement construction (JTG F40-2004), the gradation range of the target regenerated asphalt mixture AC-13 is shown in Table 17, and the asphalt dosage is 4.8%.
TABLE 17 AC-13 gradation range of regenerated asphalt mixture
According to the asphalt content in the reclaimed asphalt mortar of 7.84 percent and the gradation detection result in the table 16, the gradation range requirement and the asphalt consumption of the target reclaimed asphalt mixture AC-13 are 4.8 percent, and the mass percentage of the reclaimed asphalt mortar in the target reclaimed asphalt mixture AC-13 is determined to be 28 percent according to the requirements of technical Specification for road asphalt pavement construction (JTG F40-2004).
The coarse aggregate used in the test is a lean coarse aggregate (4.75 mm-16 mm) obtained by crushing and screening RAP material, and the grading test result is shown in Table 18.
TABLE 18 poor oil coarse aggregate grading test results in RAP materials
the fine aggregate used in the test is fresh basalt fine aggregate (0-4.75 mm) produced by Liyang Shanpei stone factory in Hezhou city, Jiangsu province, and the grading test result is shown in Table 19.
| Mesh size (mm) | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Percent by mass (%) | 95.2 | 82.6 | 53.5 | 35.6 | 24 | 16.7 | 10.3 |
The mineral powder used in the test is limestone mineral powder produced by Liyang Shanpei stone factory in Hezhou city, Jiangsu province, and the technical index of the limestone mineral powder meets the requirements of technical Specification for road asphalt pavement construction (JTG F40-2004).
The fresh asphalt used in the test is heavy traffic road petroleum asphalt AH-70 produced by Fushan oil-rich oil GmbH, and the technical indexes are shown in Table 20.
TABLE 20 heavy traffic road petroleum asphalt AH-70 test detection result
according to the total asphalt consumption of 4.8 percent of the target regenerated asphalt mixture, the asphalt consumption of 7.84 percent of the regenerated asphalt mortar and the proportion of 28 percent of the asphalt in the target regenerated asphalt mixture, the weight of the fresh heavy-traffic road petroleum asphalt AH-70 to be supplemented is calculated to be 2.6 percent of the weight of the target regenerated asphalt mixture.
According to the grading range requirement of the target regenerated asphalt mixture and the old material grading, the coarse aggregate grading, the fine aggregate grading and the mineral powder in the regenerated asphalt mortar, the coarse aggregate, the fine aggregate and the mineral powder respectively account for 66 percent, 3.1 percent and 0.3 percent of the target regenerated asphalt mixture according to the grading synthesis method in technical Specification for Highway asphalt pavement construction (JTG F40-2004)
the method comprises the following steps of determining the mass percent of the reclaimed asphalt mortar in the target reclaimed asphalt mixture by 28 percent, the mass percent of the coarse aggregate by 66 percent, the mass percent of the fine aggregate by 3.1 percent, the mass percent of the mineral powder by 0.3 percent and the mass percent of the fresh asphalt by 2.6 percent, and mixing the materials by adopting the preparation method of the reclaimed asphalt mixture based on the reclaimed asphalt mortar, wherein the preparation method comprises the following steps:
Step one, putting weighed coarse aggregate and fine aggregate heated to 170 ℃ into a mixing pot for dry mixing for 5s, then adding weighed finished product regenerated asphalt mortar and forcibly stirring for 25 s;
And step two, adding the weighed fresh asphalt and mineral powder into the product obtained in the step one, and forcibly stirring for 10s to obtain the finished product of the regenerated asphalt mixture.
For the regenerated asphalt mixture AC-13 sample prepared based on the regenerated asphalt mortar of H0, H1, H2, H3, H4, H5, and H6, after the test piece was molded indoors, the high temperature performance (marshall stability test, dynamic stability test), low temperature performance (low temperature bending test), water stability (marshall residual stability test, freeze-thaw splitting test), and fatigue life (four-point bending trabecula fatigue life test) were evaluated, and the test results are shown in tables 21, 22, 23, and 24, respectively.
| Detecting the index | H0 | H1 | H2 | H3 | H4 | H5 | H6 |
| marshall stability (KN) | 9.23 | 10.17 | 10.75 | 10.43 | 10.03 | 9.82 | 9.69 |
| Dynamic stability (times/mm) | 1077.5 | 1150.1 | 1290.2 | 1429.6 | 1636.4 | 1529.0 | 1377.4 |
Remarking: the Marshall stability of fresh heavy traffic road petroleum asphalt mixture AC-13 is not less than 8KN and the dynamic stability is not less than 1000 times/mm as required by the technical Specification for road asphalt pavement construction JTG F40-2004 (hereinafter referred to as Specifications).
| Detecting the index | H0 | H1 | H2 | H3 | H4 | H5 | H6 |
| Maximum bending strain at failure (mu epsilon) | 2146.2 | 2200.8 | 2370.5 | 2406.9 | 2311.1 | 2117.8 | 2030.9 |
Remarking: the test temperature is-10 ℃, and the specification requirement is not less than 2000 mu epsilon.
| Detecting the index | H0 | H1 | H2 | H3 | H4 | H5 | H6 |
| Marshall residual stability ratio (%) | 81.6 | 83.3 | 84.9 | 86.1 | 86.7 | 83.4 | 84.0 |
| Freeze-thaw split strength ratio (%) | 76.9 | 77.8 | 80.4 | 80.6 | 81.3 | 80.5 | 79.0 |
Remarking: the specification requires that the marshall residual stability ratio be no less than 80% and the freeze-thaw split strength ratio be no less than 75%.
| Detecting the index | H0 | H1 | H2 | H3 | H4 | H5 | H6 |
| Four-point bending fatigue life (times) | 4308 | 4566 | 6312 | 6675 | 7021 | 6488 | 6519 |
Remarking: the test temperature was 15 ℃, the target strain was 600. mu. ε, the loading frequency was 10HZ, and the test termination condition was 50%.
Example 3
Examples of laboratory tests: the used asphalt pavement milling material (RAP material) used in the test is a material with the same source and the same particle size specification, the final aim of the test is to restore the performance of the reclaimed asphalt mixture to the level required by the fresh heavy traffic asphalt mixture AC-13, and the restoration target of the used asphalt in the test is heavy traffic road petroleum asphalt AH-30.
the RAP material is firstly crushed and screened into two parts of lean coarse aggregate (the particle size is larger than 4.75 mm) and rich fine aggregate (the particle size is smaller than 4.75 mm). Then, performing an asphalt content test according to a method of T0735 in road engineering asphalt and asphalt mixture test procedures (JTG E20-2011), wherein the asphalt content of the oil-rich fine aggregate is 7.0%, screening the old mineral aggregate in the oil-rich fine aggregate obtained by the test, and the screening test result is shown in Table 25; the RAP material is subjected to extraction test by a method of T0726 in road engineering asphalt and asphalt mixture test procedures (JTG E20-2011), the old asphalt after the extraction test is recovered, and performance test detection is carried out, wherein the detection results are shown in Table 26.
| mesh size (mm) | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| percent by mass (%) | 100 | 76.1 | 56.6 | 44.5 | 33.1 | 25.4 | 24.2 |
| Penetration 25 deg.C (0.1 mm) | Softening Point (. degree. C.) | Yandu 15 deg.C (cm) |
| 25 | 78.5 | 42.3 |
According to the results of the performance tests of the old asphalt in the oil-rich fine aggregate in Table 26, the old asphalt is restored to the technical level of fresh heavy traffic road petroleum asphalt AH-30 in technical Specification for road asphalt pavement construction (JTG F40-2004) without adding a regenerant.
The preparation method of the regenerated asphalt mortar comprises the following steps:
(1) 100 parts of oil-rich fine aggregate and 0 part of regenerant are weighed and put into a mixing pot to be stirred until the materials are uniformly mixed, and the time is 5 seconds.
(2) Taking the product obtained in the step (1) out of a pot, dividing the product into 7 equal parts of samples (A0, A1, A2, A3, A4, A5 and A6), and storing the samples in a special development cabin at 130 ℃, wherein the sample A0 develops for 10min, the sample A1 develops for 60min, the sample A2 develops for 120min, the sample A3 develops for 180min, the sample A4 develops for 240min, the sample A5 develops for 300min and the sample A6 develops for 360min, so as to obtain the regenerated asphalt mortar under different conditions.
aiming at the reclaimed asphalt mortar sample obtained by the method, the asphalt and mineral aggregate are extracted and separated by adopting the Abelson method, the penetration index (100 g, 5s and 25 ℃) and the softening point and ductility index of the separated asphalt are detected, the technical requirement of judging whether the asphalt in the mortar is recovered to the fresh heavy traffic road petroleum asphalt AH-30 or not is judged, and the detection result is shown in the table 27.
TABLE 27 results of asphalt Performance test in reclaimed asphalt mortar
Remarking: a0, A1, A2, A3, A4, A5 and A6 are samples obtained after the mixture of the oil-rich fine aggregate and the regenerant develops for 10min, 60min, 120min, 180min, 240min, 300min and 360min respectively at 40 ℃ (the same below).
The asphalt content in the reclaimed asphalt mortar is 7.0 percent by adopting a combustion method, wherein the old mineral aggregate grade is shown in a table 28:
| Mesh size (mm) | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Percent by mass (%) | 100 | 76.1 | 56.6 | 44.5 | 33.1 | 25.4 | 24.2 |
According to the requirements of technical Specification for road asphalt pavement construction (JTG F40-2004), the gradation range of the target regenerated asphalt mixture AC-13 is shown in Table 29, and the asphalt dosage is 4.8%.
TABLE 29 AC-13 gradation range of regenerated asphalt mixture
According to the asphalt content in the reclaimed asphalt mortar of 7.0 percent and the gradation detection result in the table 28, the gradation range requirement and the asphalt consumption of the target reclaimed asphalt mixture AC-13 are 4.9 percent, and the mass percentage of the reclaimed asphalt mortar in the target reclaimed asphalt mixture AC-13 is determined to be 24 percent according to the requirements of technical Specification for road asphalt pavement construction (JTG F40-2004).
The coarse aggregate used in the test is crushed basalt macadam and RAP material produced by Liyang Shanpei stone factory in Hezhou city in Jiangsu province, and the screened lean oil coarse aggregate is prepared according to the proportion of 1: 1 (4.75 mm-16 mm), and the grading test results are shown in Table 30.
TABLE 30 coarse aggregate grading test results
The fine aggregate used in the test is fresh basalt fine aggregate (0-4.75 mm) produced by Liyang Shanpei stone factory in Hezhou city, Jiangsu province, and the grading test result is shown in Table 31.
| Mesh size (mm) | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Percent by mass (%) | 95.2 | 82.6 | 53.5 | 35.6 | 24 | 16.7 | 10.3 |
The mineral powder used in the test is limestone mineral powder produced by Liyang Shanpei stone factory in Hezhou city, Jiangsu province, and the technical index of the limestone mineral powder meets the requirements of technical Specification for road asphalt pavement construction (JTG F40-2004).
The fresh asphalt used in the test is heavy traffic road petroleum asphalt AH-30 produced by Fushan oil-rich oil Limited liability company, and the technical indexes are shown in Table 32.
TABLE 32 heavy traffic road petroleum asphalt AH-30 test detection result
According to the total asphalt consumption of 4.9 percent of the target regenerated asphalt mixture, the asphalt consumption of 7.0 percent of the regenerated asphalt mortar and the proportion of 24 percent of the regenerated asphalt mortar in the target regenerated asphalt mixture, the weight of the fresh heavy-traffic road petroleum asphalt AH-30 to be supplemented is calculated to be 3.22 percent of the weight of the target regenerated asphalt mixture.
According to the grading range requirement of the target regenerated asphalt mixture and the old material grading, the coarse aggregate grading, the fine aggregate grading and the mineral powder in the regenerated asphalt mortar, according to the grading synthesis method in technical Specification for construction of road asphalt pavement (JTG F40-2004), determining that the coarse aggregate, the fine aggregate and the mineral powder respectively account for 67 percent, 5.2 percent and 0.58 percent of the target regenerated asphalt mixture by mass percent
The method comprises the following steps of determining the mass percent of 24 percent of reclaimed asphalt mortar, 67 percent of coarse aggregate, 5.2 percent of fine aggregate, 0.58 percent of mineral powder and 3.22 percent of fresh asphalt in the target reclaimed asphalt mixture according to the method, and mixing the materials by adopting the preparation method of the reclaimed asphalt mixture based on the reclaimed asphalt mortar, wherein the total mass percent of the reclaimed asphalt mortar, the coarse aggregate, the fresh asphalt and the mineral powder is 100 percent, and the steps are as follows:
Step one, putting weighed coarse aggregate and fine aggregate heated to 190 ℃ into a mixing pot for dry mixing for 8s, then adding weighed finished product regenerated asphalt mortar and forcibly stirring for 20 s;
And step two, adding the weighed fresh asphalt and mineral powder into the product obtained in the step one, and forcibly stirring for 15s to obtain the finished product of the regenerated asphalt mixture.
For the reclaimed asphalt mixture AC-13 samples prepared from the reclaimed asphalt mortar based on a0, a1, a2, A3, a4, a5 and a6, after the test pieces were molded indoors, high-temperature performance (marshall stability test, dynamic stability test), low-temperature performance (low-temperature bending test), water stability (marshall residual stability test, freeze-thaw cracking test) and fatigue life (four-point bending trabecular fatigue life test) were evaluated, and the test results are shown in tables 33, 34, 35 and 36, respectively.
| Detecting the index | A0 | A1 | A2 | A3 | A4 | A5 | A6 |
| Marshall stability (KN) | 11.10 | 12.93 | 13.67 | 13.80 | 12.83 | 12.90 | 13.27 |
| Dynamic stability (times/mm) | 2440.0 | 2590.8 | 2791.5 | 3026.9 | 3108.3 | 2961.1 | 2900.6 |
Remarking: the Marshall stability of fresh heavy traffic road petroleum asphalt mixture AC-13 is not less than 8KN and the dynamic stability is not less than 1000 times/mm as required by the technical Specification for road asphalt pavement construction JTG F40-2004 (hereinafter referred to as Specifications).
| Detecting the index | A0 | A1 | A2 | A3 | A4 | A5 | A6 |
| Maximum bending strain at failure (mu epsilon) | 2008.3 | 2076.9 | 2188.4 | 2120.2 | 2209.4 | 2117.5 | 2075.9 |
Remarking: the test temperature is-10 ℃, and the specification requirement is not less than 2000 mu epsilon.
| detecting the index | A0 | A1 | A2 | A3 | A4 | A5 | A6 |
| Marshall residual stability ratio (%) | 83.9 | 85.1 | 85.7 | 84.9 | 82.5 | 82.8 | 83.4 |
| Freeze-thaw split strength ratio (%) | 76.8 | 77.0 | 79.4 | 79.3 | 80.1 | 80.7 | 78.8 |
remarking: the specification requires that the marshall residual stability ratio be no less than 80% and the freeze-thaw split strength ratio be no less than 75%.
| Detecting the index | A0 | A1 | A2 | A3 | A4 | A5 | A6 |
| Four-point bending fatigue life (times) | 3509 | 3821 | 4055 | 4682 | 5100 | 4890 | 5086 |
Remarking: the test temperature was 15 ℃, the target strain was 600. mu. ε, the loading frequency was 10HZ, and the test termination condition was 50%.
Claims (2)
1. The reclaimed asphalt mortar is characterized in that: the composition comprises the following components in parts by mass: oil-rich fine aggregate in 100 parts of asphalt pavement milling material and 0-3 parts of asphalt regenerant; the oil-rich fine aggregate in the asphalt pavement milling material is a part with the particle size of less than 4.75mm, which is obtained by crushing and screening the asphalt pavement milling material;
The preparation method of the recycled asphalt mortar comprises the following steps:
1) Adding the weighed oil-rich fine aggregate and the regenerant into a mixing pot for forced stirring until the mixture is uniformly mixed;
2) Taking the product obtained in the step 1) out of the pot, storing the product in a special development bin with stirring, developing under the conditions of specific temperature and time, and obtaining a finished product of regenerated asphalt mortar after the development is finished;
The development temperature is (40-160) DEG C (the lower limit is taken when the viscosity of the selected regenerant is low, the upper limit is taken when the viscosity of the regenerant is high), and the development time is (10-360) min.
2. A method for preparing asphalt mixture by adopting reclaimed asphalt mortar is characterized by comprising the following steps: comprises the following steps:
Step one, detecting the asphalt content and mineral aggregate gradation in the finished product of the reclaimed asphalt mortar;
Step two, determining the consumption of the reclaimed asphalt mortar which simultaneously meets the mineral aggregate gradation and the asphalt content of the target reclaimed asphalt mixture according to the detection result of the step one;
Step three, determining the dosage of coarse aggregates, fine aggregates, mineral powder and new asphalt to be supplemented in the asphalt mixture according to the test result of the step two;
Step four, putting the heated and weighed coarse aggregate and fine aggregate into a mixing pot for dry mixing, and then adding the weighed finished product regenerated asphalt mortar for forced stirring;
Step five, adding weighed fresh asphalt and mineral powder into the product obtained in the step four, and forcibly stirring to obtain a finished product regenerated asphalt mixture;
The asphalt content and mineral aggregate gradation in the reclaimed asphalt mortar product obtained in the first step are detected according to a method (T0722-1993) in road engineering asphalt and asphalt mixture test protocol (JTG E20-2011);
In the second step, the gradation and the asphalt content of the target regenerated asphalt mixture are selected according to the requirements of technical Specification for construction of road asphalt pavements (JTG F40-2004), and the gradation design and the asphalt dosage design of mineral aggregate are carried out to determine the blending proportion of the regenerated asphalt mortar;
The coarse aggregate in the third step can be any one of fresh coarse aggregate, a mixture of the fresh coarse aggregate and the lean-oil coarse aggregate in the pavement milling and planing material, the fine aggregate and the mineral powder are fresh materials, and the fresh asphalt can be one of heavy-traffic road petroleum asphalt and polymer modified asphalt;
the heating temperature of the coarse aggregate and the fine aggregate in the fourth step is 170-220 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810532923.XA CN110540383A (en) | 2018-05-29 | 2018-05-29 | Regenerated asphalt mortar and method for preparing asphalt mixture by using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810532923.XA CN110540383A (en) | 2018-05-29 | 2018-05-29 | Regenerated asphalt mortar and method for preparing asphalt mixture by using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110540383A true CN110540383A (en) | 2019-12-06 |
Family
ID=68701018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810532923.XA Pending CN110540383A (en) | 2018-05-29 | 2018-05-29 | Regenerated asphalt mortar and method for preparing asphalt mixture by using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110540383A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115504708A (en) * | 2022-09-14 | 2022-12-23 | 江苏天诺道路材料有限公司 | Thermal regeneration asphalt mixture gradation design method based on fine stripping and screening |
| CN115818996A (en) * | 2022-10-28 | 2023-03-21 | 山西晋北高速公路养护有限公司 | Treatment method of waste asphalt mixture, regenerated asphalt mixture and preparation method thereof |
| CN117248414A (en) * | 2023-10-20 | 2023-12-19 | 长安大学 | Plant-mixed hot regeneration method for RAP regeneration |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101654347A (en) * | 2009-08-07 | 2010-02-24 | 江苏省交通科学研究院股份有限公司 | Hot in-plant reclaimed asphalt mixture |
| WO2013090283A1 (en) * | 2011-12-12 | 2013-06-20 | Arizona Chemical Company, Llc | Rejuvenation of reclaimed asphalt |
| CN203440735U (en) * | 2013-07-19 | 2014-02-19 | 廊坊德基机械科技股份有限公司 | Novel regenerative heating and drying drum for recycled asphalt pavement |
| CN104164817A (en) * | 2014-08-18 | 2014-11-26 | 北京建筑大学 | Design method of hot recycled asphalt mixture with high RAP proportion |
| CN106746926A (en) * | 2016-12-13 | 2017-05-31 | 江苏天诺道路材料科技有限公司 | Separate type plantmix warms the preparation method of reclaimed asphalt mixture |
| CN107698199A (en) * | 2017-07-31 | 2018-02-16 | 江苏诺路桥工程检测有限公司 | A kind of High Modulus Asphalt Mixture based on old pavement milling material and preparation method thereof |
-
2018
- 2018-05-29 CN CN201810532923.XA patent/CN110540383A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101654347A (en) * | 2009-08-07 | 2010-02-24 | 江苏省交通科学研究院股份有限公司 | Hot in-plant reclaimed asphalt mixture |
| WO2013090283A1 (en) * | 2011-12-12 | 2013-06-20 | Arizona Chemical Company, Llc | Rejuvenation of reclaimed asphalt |
| CN203440735U (en) * | 2013-07-19 | 2014-02-19 | 廊坊德基机械科技股份有限公司 | Novel regenerative heating and drying drum for recycled asphalt pavement |
| CN104164817A (en) * | 2014-08-18 | 2014-11-26 | 北京建筑大学 | Design method of hot recycled asphalt mixture with high RAP proportion |
| CN106746926A (en) * | 2016-12-13 | 2017-05-31 | 江苏天诺道路材料科技有限公司 | Separate type plantmix warms the preparation method of reclaimed asphalt mixture |
| CN107698199A (en) * | 2017-07-31 | 2018-02-16 | 江苏诺路桥工程检测有限公司 | A kind of High Modulus Asphalt Mixture based on old pavement milling material and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115504708A (en) * | 2022-09-14 | 2022-12-23 | 江苏天诺道路材料有限公司 | Thermal regeneration asphalt mixture gradation design method based on fine stripping and screening |
| CN115818996A (en) * | 2022-10-28 | 2023-03-21 | 山西晋北高速公路养护有限公司 | Treatment method of waste asphalt mixture, regenerated asphalt mixture and preparation method thereof |
| CN115818996B (en) * | 2022-10-28 | 2024-02-23 | 山西晋北高速公路养护有限公司 | Treatment method of waste asphalt mixture, regenerated asphalt mixture and preparation method of regenerated asphalt mixture |
| CN117248414A (en) * | 2023-10-20 | 2023-12-19 | 长安大学 | Plant-mixed hot regeneration method for RAP regeneration |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11472740B2 (en) | Plant-mixed warm regenerated asphalt mixture and preparation method thereof | |
| CN102786257B (en) | Plant-mixed thermally-modified asphalt regenerated mix and preparation method thereof | |
| Kowalski et al. | Eco-friendly materials for a new concept of asphalt pavement | |
| CN112125575B (en) | High-efficiency regenerated asphalt mixture and preparation process thereof | |
| CN107698199B (en) | High-modulus asphalt mixture based on old pavement milling material and preparation method thereof | |
| CN104119032B (en) | A kind of SBS asphalt regenerative method of high RAP volume | |
| CN113698139B (en) | High-doping-amount RAP plant-mixed hot-recycling modified asphalt mixture and preparation method thereof | |
| CN109721286B (en) | Heat-resistant recycled asphalt concrete and preparation method thereof | |
| CN104844072A (en) | Preparation method of plant-mixed hot recycled asphalt mixture | |
| CN110981287A (en) | High-binding-property recycled asphalt concrete and preparation process thereof | |
| CN110551402B (en) | Normal-temperature regenerant for waste asphalt mixture and preparation method thereof | |
| CN108046663B (en) | Steel slag-doped recycled asphalt concrete and preparation method thereof | |
| CN110540383A (en) | Regenerated asphalt mortar and method for preparing asphalt mixture by using same | |
| CN108822563B (en) | Clarithromi asphalt dry-process modifier and application thereof | |
| CN114538827A (en) | Mixture of polymer composite rubber modified asphalt high-performance steel slag ultrathin wearing layer | |
| CN111747683A (en) | Hot-mix-in-plant asphalt mixture and preparation method thereof | |
| CN105859175A (en) | Plant-mixed warm regenerated asphalt mixture of large-proportion RAP material | |
| CN112029306A (en) | Preparation method of epoxy modified emulsified asphalt with shape memory performance | |
| CN110590221A (en) | Environment-friendly recycled asphalt concrete and preparation method thereof | |
| CN105778533A (en) | High-permeability composite high-molecular polymer hot-melt crack filling material and preparation method | |
| CN110283616B (en) | Waste tire thermal cracking regeneration carbon black modified material and modified asphalt | |
| CN113863082B (en) | BRT station heavy-load traffic road section paving structure and construction method | |
| KR101668619B1 (en) | Recycled cold asphalt concrete mixture and road paving method using the same | |
| CN115246997A (en) | Epoxy asphalt cement for asphalt old material regeneration and preparation method thereof | |
| CN112159157A (en) | Wet direct-vat rubber-recycled asphalt mixture and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20191206 |