Method for evaluating compaction performance of graded broken stone base with ultra-large particle size

Abstract

The invention relates to the technical field of performance evaluation, in particular to a method for evaluating the compaction performance of an oversized-particle-size graded broken stone base layer, which comprises the following steps of: forming an oversized-particle-size graded broken stone mixture test piece by adopting a vibration compaction method, and testing the volume fraction of coarse aggregate of more than 19mm in the mixture test piece to obtain the volume fraction of the coarse aggregate of the test piece; the method comprises the following steps: testing the volume ratio of coarse aggregate after the super-large-particle-size graded broken stone base is compacted, testing the volume coefficient of the coarse aggregate in combination with the volume ratio of the coarse aggregate of a test piece, and evaluating the compaction performance of the super-large-particle-size graded broken stone base based on the volume ratio of the compacted coarse aggregate and the volume coefficient of the coarse aggregate. The method can directly reflect the physical characteristics and mechanical significance of the super-large-particle-size graded broken stone material, the coarse aggregate volume ratio index can directly reflect the physical characteristics of the coarse aggregate content of the super-large-particle-size graded broken stone mixture, and the evaluation standard directly reflects that the coarse aggregate volume ratio is high, and the skeleton interlocking capacity is more excellent.

Description

Technical Field

[0001] The invention relates to the technical field of performance evaluation, and in particular to a method for evaluating the compaction performance of a super-large particle size graded crushed stone base. Background Art

[0002] Early high-grade highways were mainly built with cement pavement. In recent years, large-scale old cement pavement has reached the end of its life, and thousands of kilometers of old cement pavement face major and medium repairs every year. According to the practice and experience of major and medium repairs of old cement pavements in recent years, the main structural scheme is to crush the old cement pavement and then lay an asphalt pavement with a super-large particle size graded crushed stone base. This is because the super-large particle size graded crushed stone mixture has a good skeleton interlocking structure, which can improve the overall bearing capacity and deformation resistance of the pavement structure; since no cementitious materials are added, a strong plate structure will not be formed, and the strength of the surface of the old cement pavement after crushing can be homogenized to reduce the structural cracking caused by stress concentration under traffic load; in addition, after the construction of the super-large particle size graded crushed stone base is completed, there is no need for curing, and the impact of non-interruption of traffic construction is small. It has wide applicability in road network maintenance projects. In recent years, it has been promoted and applied on a large scale in major and medium repairs of old cement pavements on road networks.

[0003] Although the super-large particle size graded crushed stone base has a good application effect, the traditional graded crushed stone base quality acceptance method is not suitable for the super-large particle size graded crushed stone base. There are mainly the following problems: (1) The compaction index is the ratio of the maximum dry density tested by the on-site pit digging method to the maximum dry density tested by the indoor compaction method. However, due to the high coarse aggregate content and larger nominal maximum particle size of the super-large particle size graded crushed stone mixture, the density dispersion of indoor and on-site tests is large. The compaction index is difficult to truly reflect the actual compaction effect of the super-large particle size graded crushed stone base; (2) The solid volume ratio is the ratio of the volume of solid particles tested by the on-site pit digging method to the volume of the test hole dug. Although this method can evaluate the compaction effect, it cannot reflect the overall bearing capacity and deformation resistance of the base, and cannot effectively guarantee the construction quality of the base. This is mainly due to the high content of coarse aggregate in the super-large particle size graded crushed stone mixture, which is easy to segregate during construction. The fine aggregate segregation area is easier to compact, and the tested solid volume rate is high, with good compaction effect, but the bearing capacity of the fine aggregate segregation area is low and the deformation resistance is poor; the solid volume rate of the coarse aggregate segregation area is low, and the compaction effect is poor, but the coarse aggregate segregation area has a higher bearing capacity and stronger deformation resistance.

[0004] Therefore, there is an urgent need to study an evaluation method that can effectively evaluate the overall compaction effect of the base layer and reflect the overall mechanical properties of the base layer. Summary of the invention

[0005] The object of the present invention is to provide a method for evaluating the compaction performance of a super-large particle size graded crushed stone base layer, aiming to solve the problem of effectively evaluating the overall compaction effect of the base layer and reflecting the overall mechanical properties of the base layer.

[0006] To achieve the above object, the present invention provides a method for evaluating the compaction performance of a super-large particle size graded crushed stone base layer, including the following steps:

[0007] Using the vibration compaction method to form specimens of super-large particle size graded crushed stone mixture;

[0008] Testing the volume ratio of coarse aggregates larger than 19 mm in the mixture specimens to obtain the volume ratio of coarse aggregates in the test specimens;

[0009] Testing the volume ratio of coarse aggregates in the super-large particle size graded crushed stone base layer after compaction, and combining with the volume ratio of coarse aggregates in the test specimens to test the volume coefficient of coarse aggregates;

[0010] Evaluating the compaction performance of the super-large particle size graded crushed stone base layer based on the volume ratio of coarse aggregates after compaction and the volume coefficient of coarse aggregates.

[0011] Among them, the specific method of forming specimens of super-large particle size graded crushed stone mixture by using the vibration compaction method indoors:

[0012] Weighing aggregates and water based on a preset ratio, and stirring and sealing the aggregates and water for material moistening to obtain a mixture;

[0013] Putting the mixture into a steel test mold, and placing the steel test mold into a vibration compactor for vibration compaction test. After compaction, taking out the steel test mold to obtain mixture specimens.

[0014] Among them, the specific method of testing the volume ratio of coarse aggregates larger than 19 mm in the mixture specimens to obtain the volume ratio of coarse aggregates in the test specimens:

[0015] Testing the diameter and height of the mixture specimens and calculating the volume;

[0016] Demolding and dispersing the mixture specimens, placing them in an oven and drying to constant weight, screening the coarse aggregates larger than 19 mm, and then weighing the mass of the coarse aggregates larger than 19 mm to test the first bulk density;

[0017] Calculating the volume ratio of coarse aggregates in the test specimens based on the weighed mass and the first bulk density.

[0018] Among them, the specific method of testing the volume ratio of coarse aggregates in the super-large particle size graded crushed stone base layer after compaction, and combining with the volume ratio of coarse aggregates in the test specimens to test the volume coefficient of coarse aggregates:

[0019] Selecting the loose density of calibrated sand for the sand filling equipment;

[0020] Place the sand-filled sand canister of the sand pouring cylinder on the glass plate, and turn on the switch. Close the switch until the sand in the sand storage cylinder stops flowing. Weigh the mass of the sand remaining on the glass plate.

[0021] For the super-large particle size graded crushed stone base course after compaction, select 2 points every 200 meters. Place the base plate on the surface of the selected points, drill holes along the middle hole of the base plate to obtain test holes, and weigh the mass of the super-large particle size graded crushed stone mixture excavated from the test holes.

[0022] Remove the base plate, align the sand pouring cylinder filled with sand with the test hole, turn on the switch, and close the switch until the sand in the sand storage cylinder stops flowing. Weigh the mass of the sand in the sand storage cylinder.

[0023] Calculate the mass of the sand used to fill the test hole and the volume of the test hole, dry the excavated super-large particle size graded crushed stone mixture to a constant weight, screen and weigh the total mass of the coarse aggregate larger than 19 mm, and test the second bulk density.

[0024] Calculate the total mass of the coarse aggregate and the second bulk density, and calculate the volume of the coarse aggregate larger than 19 mm in the excavated mixture.

[0025] Based on the total mass of the coarse aggregate, the second bulk density, the volume of the coarse aggregate larger than 19 mm in the excavated mixture, the volume of the test hole, and the coarse aggregate volume ratio of the test piece, calculate the coarse aggregate volume ratio and the coarse aggregate volume coefficient after compaction of the super-large particle size graded crushed stone base course.

[0026] Among them, the evaluation criterion is that the coarse aggregate volume ratio after compaction of the super-large particle size graded crushed stone base course is greater than or equal to 39%, and the coarse aggregate volume coefficient is greater than or equal to 1, then the super-large particle size graded crushed stone base course achieves a good compaction effect.

[0027] An evaluation method for the compaction performance of a super-large particle size graded crushed stone base of the present invention uses the vibration compaction method to form specimens of super-large particle size graded crushed stone mixtures; measures the volume ratio of coarse aggregates larger than 19 mm in the mixture specimens to obtain the volume ratio of coarse aggregates in the test specimens; measures the volume ratio of coarse aggregates after compaction of the super-large particle size graded crushed stone base, and combines the volume ratio of coarse aggregates in the test specimens to measure the volume coefficient of coarse aggregates; evaluates the compaction performance of the super-large particle size graded crushed stone base based on the volume ratio of coarse aggregates after compaction and the volume coefficient of coarse aggregates. This method can directly reflect the physical characteristics and mechanical significance of super-large particle size graded crushed stone materials. Among them, the volume ratio index of coarse aggregates can directly reflect the physical characteristics of the content of coarse aggregates in super-large particle size graded crushed stone mixtures, and the evaluation criteria can directly reflect the mechanical significance that "a higher proportion of coarse aggregate volume has better framework interlocking ability and can better exert the overall bearing capacity of the super-large particle size graded crushed stone base"; this evaluation method avoids the problems of large discreteness and insufficient reliability of the test results of traditional compaction degree methods, and at the same time makes up for the drawback of the solid volume ratio method that "it cannot reflect the overall bearing capacity and deformation resistance of the base". The test results of this method are more reliable and accurate, and can truly reflect the quality and effect of entity construction; it is beneficial to improve the construction quality of the super-large particle size graded crushed stone base and promote the large-scale popularization and application of the super-large particle size graded crushed stone base technology in Guangxi. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0029] Figure 1 is a flowchart of an evaluation method for the compaction performance of a super-large particle size graded crushed stone base provided by the present invention.

[0030] Figure 2 is a flowchart of the specific method for forming specimens of super-large particle size graded crushed stone mixtures by vibration compaction method indoors.

[0031] Figure 3 is a flowchart of the specific method for measuring the volume ratio of coarse aggregates larger than 19 mm in the mixture specimens to obtain the volume ratio of coarse aggregates in the test specimens.

[0032] Figure 4 is a flowchart of the specific method for measuring the volume ratio of coarse aggregates after compaction of the super-large particle size graded crushed stone base and combining the volume ratio of coarse aggregates in the test specimens to measure the volume coefficient of coarse aggregates. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0034] Please refer to Figures 1 to 4 , the present invention provides a method for evaluating the compaction performance of a super-large particle size graded crushed stone base course, comprising the following steps:

[0035] S1 Use the vibration compaction method to form specimens of super-large particle size graded crushed stone mixture;

[0036] Specific method:

[0037] S11 Weigh the aggregate and water based on a preset ratio, and stir and seal the aggregate and water for material retting to obtain a mixture;

[0038] In an embodiment of the present invention, weigh the masses of the aggregate and water according to the design mix ratio, with a total mass of about 5000 g. Manually mix the aggregate and water evenly and put them into a stainless steel basin. Seal the basin mouth with a plastic film for material retting for 24 h to avoid water evaporation.

[0039] S12 Load the mixture into a steel test mold, and place the steel test mold in a vibration compactor for a vibration compaction test. After compaction, take out the steel test mold to obtain a mixture specimen.

[0040] In an embodiment of the present invention, after material retting is completed, evenly weigh about 2500 g of the mixture and load it into a cylindrical steel test mold with an inner diameter of Φ152 mm and a height of 170 mm. Tamp it while loading, then place the test mold in a vibration compactor for a vibration compaction test. After compaction for 60 s, take out the steel test mold, then add the remaining mixture to the test mold, tamp it while loading, and level the surface. Then place the test mold in the vibration compactor again for a vibration compaction test. After compaction for 120 s, take out the steel test mold to obtain super-large particle size graded crushed stone mixture specimens, and the number of parallel specimens is 4 - 6.

[0041] S2 Test the volume ratio of coarse aggregate with a particle size of more than 19 mm in the mixture specimen to obtain the volume ratio of coarse aggregate of the test specimen;

[0042] Specific method:

[0043] S21 Test the diameter and height of the mixture specimen and calculate the volume;

[0044] In an embodiment of the present invention, test the diameter D and height H of the test specimen, and calculate the volume V of the test specimen. The formula is as follows:

[0045] S22 Demold and disperse the mixture specimens, place them in an oven and dry them to a constant weight, screen the coarse aggregate larger than 9 mm, then weigh the coarse aggregate larger than 19 mm, and test the first bulk specific gravity.

[0046] In the embodiment of the present invention, the formed specimens are demolded and dispersed, then placed in an oven at 105°C ± 5°C and dried to a constant weight, and then a screening test is carried out to obtain the coarse aggregate larger than 19 mm, and the mass m of the coarse aggregate larger than 19 mm is weighed. 0 , and test the bulk specific gravity γ of the coarse aggregate larger than 19 mm according to Method T 0304 in the "Test Regulations for Aggregates in Highway Engineering" (JTG 3432-2024). 0 .

[0047] S23 Calculate the coarse aggregate volume ratio of the test piece based on the weighed mass and the first bulk specific gravity.

[0048] The formula is as follows:

[0049]

[0050] S3 Test the coarse aggregate volume ratio after compaction of the super-large-size graded crushed stone base course, and combine it with the coarse aggregate volume ratio of the test piece to test the coarse aggregate volume coefficient;

[0051] Specific method:

[0052] S31 Select the loose bulk density of the calibrated sand for the sand filling equipment.

[0053] In the embodiment of the present invention, a sand filling equipment with a diameter of 200 mm and a volume of 8482 cm3 is selected, and the loose bulk density γ of the calibrated sand is determined according to Method T 0921 in the "Field Test Regulations for Highway Subgrade and Pavement" (JTG 3450-2019). s , and the particle size of the calibrated sand is 0.3 mm to 0.6 mm.

[0054] S32 Place the sand filling cylinder filled with calibrated sand on the glass plate, and open the switch until the calibrated sand in the sand storage cylinder no longer flows down, then close the switch and weigh the mass of the calibrated sand remaining on the glass plate;

[0055] In the embodiment of the present invention, place the sand filling cylinder filled with calibrated sand m 1 on the glass plate, open the switch of the sand filling cylinder until the sand in the sand storage cylinder no longer flows down, then close the switch and weigh the mass of the sand remaining on the glass plate (i.e., the mass of the sand in the conical body of the sand filling cylinder) m 2 ;

[0056] S33 Select 2 points every 200 meters on the compacted super-large-size graded crushed stone base course, place the base plate on the selected point surface, drill a hole along the middle hole of the base plate to obtain a test hole, and weigh the mass of the super-large-size graded crushed stone mixture dug out in the test hole;

[0057] In the embodiment of the present invention, for the super-large-sized graded crushed stone base course after compaction, select 2 points every 200 meters. Place the base plate on the surface of the selected points, drill holes along the middle hole of the base plate. The depth of the test hole should be the compaction thickness of the base course, and weigh the mass m of the super-large-sized graded crushed stone mixture dug out from the test hole. 3 ;

[0058] S34 Remove the base plate, align the sand filling cylinder filled with calibrated sand with the test hole, open the switch, and close the switch until the sand in the sand storage cylinder no longer flows down, and weigh the mass of the sand in the sand storage cylinder.

[0059] In the embodiment of the present invention, remove the base plate, align the sand filling cylinder filled with calibrated sand m 1 with the test hole, open the switch of the sand filling cylinder, and close the switch until the sand in the sand storage cylinder no longer flows down, and weigh the mass m 4 ;

[0060] S35 Calculate the mass of the calibrated sand used to fill the test hole and the volume of the test hole, and dry the dug-out super-large-sized graded crushed stone mixture to a constant weight, screen and weigh the total mass of the coarse aggregate above 19 mm, and test the second bulk specific gravity.

[0061] In the embodiment of the present invention, calculate the mass m s of the sand used to fill the test hole and the volume V s

[0062] m s = m 1 - m 4 - m 2

[0063]

[0064] S36 Calculate the total mass of the coarse aggregate and the second bulk specific gravity, and calculate the volume of the coarse aggregate above 19 mm in the dug-out mixture.

[0065] In the embodiment of the present invention, dry the dug-out super-large-sized graded crushed stone mixture m 3 to a constant weight, then conduct a screening test, weigh the total mass m 5 of the coarse aggregate above 19 mm, and test the bulk specific gravity γ 1 ;

[0066] Calculate the volume V 1 ;

[0067]

[0068] S37 calculates the volume ratio and volume coefficient of coarse aggregates after compaction of the super-large particle size graded crushed stone base course based on the total mass of the coarse aggregates, the second bulk density, the volume of coarse aggregates larger than 19 mm in the excavated mixture, the volume of the test hole, and the volume ratio of coarse aggregates in the test piece.

[0069] In the embodiment of the present invention, the volume ratio ρ of coarse aggregates in the super-large particle size graded crushed stone base course after compaction is calculated 1 and the volume coefficient μ of coarse aggregates.

[0070]

[0071] S4 evaluates the compaction performance of the super-large particle size graded crushed stone base course based on the volume ratio of coarse aggregates after compaction and the volume coefficient of coarse aggregates.

[0072] In the embodiment of the present invention, the evaluation criterion is that the volume ratio of coarse aggregates in the super-large particle size graded crushed stone base course after compaction is greater than or equal to 39% (ρ 1 ≥39%), and the volume coefficient of coarse aggregates is greater than or equal to 1 (μ≥1), then the super-large particle size graded crushed stone base course achieves a good compaction effect.

[0073] To better understand the technical solution, the following embodiments are provided for further illustration:

[0074] Embodiment:

[0075] I. The mix proportion of the super-large particle size graded crushed stone mixture is shown in Table 1. Five portions of the super-large particle size graded crushed stone mixture are prepared according to the mix proportion in Table 1. In each portion of the mixture, there are 2160 g of aggregates with a specification of 20 mm - 40 mm, 864 g of aggregates with a specification of 10 mm - 20 mm, 528 g of aggregates with a specification of 5 mm - 10 mm, 1248 g of aggregates with a specification of 0 mm - 5 mm, and 240 g of tap water. Then, after manual mixing evenly, the mixture is left to stand for 24 h.

[0076] Table 1 Mix proportion of the super-large particle size graded crushed stone mixture

[0077] Specification 20～40 10～20 5～10 0～5 Moisture content Ratio / % 45 18 11 26 5 Mass / g 2160 864 528 1248 240

[0078] II. Five portions of the super-large particle size graded crushed stone mixture are taken for vibration compaction tests. The heights and diameters of 5 test pieces are measured respectively, and the volumes of the 5 test pieces after compaction are calculated. The test results are shown in Table 2.

[0079] Table 2 Test results of the volumes of the super-large particle size graded crushed stone mixture test pieces

[0080]

[0081]

[0082] III. Demold the 5 formed specimens and disperse them, then place them separately in stainless steel basins. Then, place the dispersed super-large-size graded aggregate mixture in an oven at 105°C ± 5°C and dry it to a constant weight. Then, conduct a sieving test to obtain the coarse aggregate above 19 mm in the 5 portions of the mixture. Weigh the mass of the coarse aggregate above 19 mm respectively, and test the bulk specific gravity of the coarse aggregate above 19 mm according to Method T 0304 in the "Test Regulations for Aggregates in Highway Engineering" (JTG 3432-2024). Calculate the volume ratio of the coarse aggregate above 19 mm respectively, and take the average value. The test results are shown in Table 3.

[0083] Table 3 Test Results of Coarse Aggregate Volume in Super-Large-Size Graded Aggregate Mixture Specimens

[0084]

[0085] IV. Select 2 test points on the compacted super-large-size graded aggregate base of a certain section on site. The surface of the test points should be flat, and then use the sand replacement method to test the volume of the potholes.

[0086] V. Dry the 2 portions of the super-large-size graded aggregate mixture dug out from the potholes to a constant weight, then conduct a sieving test, weigh the total mass of the coarse aggregate above 19 mm, and test the bulk specific gravity of the coarse aggregate above 19 mm according to Method T0304 in the "Test Regulations for Aggregates in Highway Engineering" (JTG 3432-2024). Calculate the volume ratio of the coarse aggregate above 19 mm respectively, and calculate the coarse aggregate volume coefficient. The test results are shown in Table 4.

[0087]

[0088] VI. Evaluate the compaction performance of the super-large-size graded aggregate base implemented on site according to the method in the invention. The two test points selected on site both meet the requirements of ρ≥39% and μ≥1. Therefore, the on-site compaction effect is good.

[0089] The above-disclosed is only a preferred embodiment of a method for evaluating the compaction performance of a super-large-size graded aggregate base of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the invention.

Claims

1. A method for evaluating the compaction performance of a super-large particle size graded crushed stone base, characterized in that: The following steps are involved: The vibration compaction method was used to form the super-large particle size graded crushed stone mixture specimens; Testing the volume ratio of coarse aggregate larger than 19 mm in the mixture specimen to obtain the coarse aggregate volume ratio of the test specimen; Testing the coarse aggregate volume ratio of the super-large particle size graded crushed stone base after compaction, and testing the coarse aggregate volume coefficient in combination with the coarse aggregate volume ratio of the test piece; The compaction performance of the super-large particle size graded crushed stone base is evaluated based on the compacted coarse aggregate volume ratio and the coarse aggregate volume coefficient.

2. The method for evaluating the compaction performance of the super-large particle size graded crushed stone base according to claim 1, It is characterized by: The specific method of forming the super-large particle size graded crushed stone mixture specimen indoors by the vibration compaction method is as follows: Weighing aggregate and water based on a preset ratio, stirring the aggregate and water, and sealing the aggregate to obtain a mixture; The mixture is loaded into a steel test mold, and the steel test mold is placed in a vibration compactor for a vibration compaction test. After compaction, the steel test mold is taken out to obtain a mixture test piece.

3. The method for evaluating compaction performance of super-large particle size graded crushed stone base according to claim 1, characterized in that; The specific method of testing the volume ratio of coarse aggregates larger than 19 mm in the mixture specimen to obtain the volume ratio of coarse aggregates in the test specimen is as follows: Testing the diameter and height of the mixture specimen and calculating the volume; The mixture specimen is separated from the film and placed in an oven to dry to constant weight, coarse aggregates larger than 19 mm are sieved, and then the mass of the coarse aggregates larger than 19 mm is weighed to test the first bulk density; Based on the weighed mass and the first bulk density, the coarse aggregate volume ratio of the test piece is calculated.

4. The method for evaluating compaction performance of super-large particle size graded crushed stone base according to claim 1, It is characterized by: The specific method of testing the coarse aggregate volume ratio after compaction of the super-large particle size graded crushed stone base and testing the coarse aggregate volume coefficient in combination with the coarse aggregate volume ratio of the test piece is as follows: Select the loose density of the sand to be calibrated by the sand filling equipment; Place a sand tank containing measuring sand on a glass plate and turn on the switch until the measuring sand in the sand tank stops flowing down, then turn off the switch and weigh the mass of the measuring sand remaining on the glass plate; Select 2 points every 200 meters of the compacted super-large particle size graded crushed stone base, place the base plate on the selected point surface, drill holes along the holes in the base plate to obtain test holes, and weigh the mass of the super-large particle size graded crushed stone mixture dug out from the test holes; Remove the substrate, align the sand filling tube containing the measured sand with the test hole, turn on the switch, and close the switch until the sand in the sand storage tube stops flowing down, and weigh the mass of the sand in the sand storage tube; Calculate the mass of sand used to fill the test hole and the volume of the test hole, dry the excavated super-large particle size graded crushed stone mixture to constant weight, sieve and weigh the total mass of coarse aggregates above 19 mm, and test the second bulk density; Calculate the total mass of the coarse aggregate and the second bulk density to calculate the volume of the coarse aggregate larger than 19 mm in the excavated mixture; Based on the total mass of the coarse aggregate, the second bulk density, the volume of coarse aggregate larger than 19 mm in the excavated mixture, the volume of the test hole and the coarse aggregate volume ratio of the test piece, the coarse aggregate volume ratio and the coarse aggregate volume coefficient after compaction of the super-large particle size graded crushed stone base are calculated.

5. The method for evaluating the compaction performance of a super-large particle size graded crushed stone base according to claim 1, characterized in that ； The evaluation standard is that after the ultra-large particle size graded crushed stone base is compacted, the coarse aggregate volume ratio is greater than or equal to 39%, and the coarse aggregate volume coefficient is greater than or equal to 1, then the ultra-large particle size graded crushed stone base achieves a better compaction effect.

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