CN113466019B - Method for determining minimum gravel consumption of gravel seal - Google Patents
Method for determining minimum gravel consumption of gravel seal Download PDFInfo
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- CN113466019B CN113466019B CN202110715692.8A CN202110715692A CN113466019B CN 113466019 B CN113466019 B CN 113466019B CN 202110715692 A CN202110715692 A CN 202110715692A CN 113466019 B CN113466019 B CN 113466019B
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000010426 asphalt Substances 0.000 claims abstract description 136
- 238000012360 testing method Methods 0.000 claims abstract description 87
- 238000003892 spreading Methods 0.000 claims abstract description 77
- 239000004575 stone Substances 0.000 claims abstract description 41
- 239000003973 paint Substances 0.000 claims abstract description 21
- 239000004744 fabric Substances 0.000 claims abstract description 19
- 238000005507 spraying Methods 0.000 claims abstract description 9
- 238000005096 rolling process Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 10
- 229920002545 silicone oil Polymers 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims description 2
- 239000001044 red dye Substances 0.000 claims description 2
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- 238000005303 weighing Methods 0.000 claims description 2
- 238000009826 distribution Methods 0.000 claims 2
- 238000012423 maintenance Methods 0.000 abstract description 4
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- 238000002156 mixing Methods 0.000 description 6
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- 239000011248 coating agent Substances 0.000 description 3
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- 230000000694 effects Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/30—Staining; Impregnating ; Fixation; Dehydration; Multistep processes for preparing samples of tissue, cell or nucleic acid material and the like for analysis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/34—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by mechanical means, e.g. hammer blows
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/366—Moulds; Demoulding
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
Abstract
The invention discloses a method for determining the minimum broken stone using amount of a broken stone seal layer by taking a non-stick wheel as an index, and belongs to the technical field of road engineering maintenance. The testing method comprises the steps of forming an asphalt layer in the gravel lower seal layer in advance, spraying red paint on the asphalt layer uniformly to serve as a testing area, spreading gravel uniformly on the testing area, then laying a layer of white cloth on the gravel seal layer, rolling by using a wheel rolling instrument, and determining the minimum gravel consumption of the gravel seal layer by taking whether red paint exists in a white cloth area corresponding to the testing area as a wheel sticking index. The method can solve the problem of wheel sticking by asphalt and determine the minimum broken stone consumption under the condition that the asphalt does not stick to the wheel, thereby reducing the cost.
Description
Technical Field
The invention belongs to the technical field of highway maintenance, and particularly relates to a method for determining the minimum broken stone using amount by taking a non-stick wheel as an index in a broken stone sealing layer.
Background
With the rapid development of economy in China, the construction of the traffic industry is also vigorously developed. Asphalt pavements have been widely used in all levels of highways and urban roads due to their advantages of comfort, safety, low noise, short construction period, early traffic opening, etc. At present, the construction of asphalt pavement roads in China enters a large-scale maintenance stage from a large-scale new construction stage, and in various maintenance means of the pavement, the gravel seal is widely applied and can be used as a stress absorbing layer, an adhesive waterproof layer and the like besides a surface wearing layer.
Asphalt thin layer overlay is a treatment technique between the seal coat and the overlay. The thin layer overlay structure is divided into two levels: a surface wearing layer and a bonding waterproof layer. There are many kinds of thin-layer covers, which are classified into synchronous thin-layer covers and stepwise thin-layer covers according to the construction time interval between the adhesive layer and the thin-layer cover. When the gravel seal is used for bonding the waterproof layer, the purpose of spreading gravel is to prevent asphalt from sticking the wheel. The construction on wearing and tearing layer when carrying out the mixture and pave in the construction of substep thin layer top facing road surface, needs the dumper operation on base pitch seal to lead to operation vehicle tire direct contact pitch adhesion wheel to destroy the pitch seal behind the asphalt layer, and the pollutant on the tire can influence asphalt layer effect. Aiming at the defects of a step-by-step thin overlay construction process, gravels are spread on an asphalt layer, so that asphalt is prevented from sticking a wheel, a synchronous gravels sealing layer spreading mode is selected for spreading the gravels, and the main purpose of spreading the gravels is to ensure that tires are not contacted with an asphalt sealing layer when an asphalt mixture spreader works, so that a method for determining the minimum gravels using amount of the gravels sealing layer is needed to be invented.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a method for determining the minimum crushed stone amount of a crushed stone seal.
The technical scheme is as follows: a method for determining the minimum gravel using amount of a gravel seal is characterized by comprising the following steps:
step 1, forming a rut plate test piece by a wheel grinding method;
step 2, weighing the spreading crushed stones with spreading rates of n%, n +5%, n +10% and n +15% (n is more than or equal to o), and placing the crushed stones into an oven at 170 ℃ for heating for later use;
step 3, folding the silicone oil paper into the shape of an asphalt sheet forming die and putting the asphalt sheet forming die into the die;
step 4, putting the asphalt into a 170 ℃ oven for heating, placing a forming mold on an electric furnace for heating after the asphalt is in a flowing state, measuring the temperature by using an infrared warm gun during the heating process, pouring the asphalt into the mold when the mold is heated to 110 ℃, continuing to heat so that the asphalt is uniformly distributed in the mold, taking the mold off the electric furnace, placing the mold in a room for cooling, placing the mold and the asphalt into a-10 ℃ refrigerator for cooling and heat preservation for 10min after the asphalt sheet is cooled to the room temperature, then demolding the asphalt sheet, and preparing 4 asphalt sheets by the same method;
step 5, sequentially attaching 4 asphalt sheets to the asphalt mixture rut plate test piece to form an asphalt seal;
step 6, selecting 4 test areas on the asphalt seal layer, and respectively spraying red paint;
step 7, uniformly spreading the spreading crushed stones with spreading rates of n%, n +5%, n +10% and n +15% (n is more than or equal to 0) on 4 test areas in sequence;
step 8, covering the crushed stone seal layer with white cloth after the crushed stone spreading is finished, placing the rut plate on a rut plate forming machine for rolling for two times, and using whether the white cloth is stained with red dye as a judgment basis for whether the asphalt is adhered to the wheel or not;
step 9, detaching the track plate from the forming machine, and checking whether the white cloth areas corresponding to the four test areas are stained with red paint, if so, the requirement of not sticking the wheel is not met, and if not, the requirement of not sticking the wheel is met; the minimum broken stone spreading rate judging method comprises the following steps:
(1) If the 4 test areas do not adhere to the wheel, preparing the asphalt seal again, selecting 4 test areas, and sequentially setting the rubble spreading rate to be n-20%, n-15%, n-10% and n-5% (n-20 is more than or equal to 0); selecting the maximum spreading rate of a wheel sticking test area plus 5 percent as the minimum broken stone spreading rate of the asphalt seal;
(2) If the 4 test areas are bonded with wheels, preparing an asphalt seal again, selecting 4 test areas, and sequentially setting the spreading rate of crushed stones to be n +20%, n +25%, n +30% and n +35%; selecting the minimum spreading rate of a wheel sticking prevention test area as the minimum broken stone spreading rate of the asphalt seal;
(3) And if the 4 test areas are provided with the sticky wheels and the non-sticky wheels, selecting the minimum gravel spreading rate of the non-sticky wheel test area as the minimum gravel spreading rate of the asphalt seal.
The invention further defines the technical scheme as follows: in the step 2, the spreading rates of the n percent, n +5 percent, n +10 percent and n +15 percent (n is more than or equal to 0) of the gravels are X kg/m of the using amount of the gravels when the gravels are fully distributed (100 percent) 2 Percentage of (c).
Preferably, the asphalt sheet mold in step 3 is a stainless steel mold having dimensions of 150mm × 150mm × 20mm.
Preferably, before the asphalt sheet is attached to the rut plate test piece in step 5, a layer of silicone oil paper is laid on the rut plate, and then the asphalt sheet is attached, so that the rut plate test piece can be reused.
Preferably, in step 6, the test area is a square area of 10cm × 10cm in the middle of each asphalt sheet, the spraying treatment method is to dig a square with an area of 10cm × 10cm in the middle of 15cm × 15cm of paper to finally form a square paper ring, the cut square paper ring is attached to the asphalt sheet, red paint is sprayed on the square paper ring, then the square paper ring is taken away, and the red paint area is used as a test area, and 4 test areas are sequentially sprayed.
Preferably, the white cloth should be closely attached to the rut plate in step 8, and no wrinkle occurs, so as to ensure the accuracy of the result.
Has the advantages that: the invention provides a method for determining the minimum gravel using amount of a gravel seal layer by taking a non-stick wheel as an index. Has the following beneficial effects:
(1) The invention can solve the limitation of construction machinery, and provides a solution for synchronously paving but not because no synchronous paver is available or the paving price is too expensive.
(2) When step-by-step thin-layer overlay construction is carried out, the method can prevent an asphalt bonding wheel from damaging an asphalt seal layer after a tire of a vehicle of an asphalt mixture paver directly contacts the asphalt seal layer and prevent pollutants on the tire from influencing the effect of the asphalt layer, so that the tire is not bonded, the minimum broken stone spreading rate is obtained, the cost is saved, and the defect of step-by-step thin-layer overlay construction is overcome.
(3) The method can accurately control the thickness uniformity of the asphalt seal, thereby reducing the test error.
(4) The method can realize that a piece of paper is laid under the asphalt seal, if the test fails, the asphalt seal can be prepared again, the rut plate test piece is used for multiple times, and 4 test areas on one plate increase the speed of obtaining the minimum spreading rate, improve the efficiency and reduce the time and material cost.
(5) The method provided by the invention is an indoor test method, is simple to operate, has high data obtaining efficiency and extremely low cost, and can greatly reduce the engineering cost for engineering.
Drawings
FIG. 1 shows a pitch sheet forming mold with silicone oil paper attached in an embodiment of the present invention,
figure 2 is a schematic view of a pitch sheet formed in accordance with an embodiment of the present invention,
figure 3 is a schematic view of an asphalt seal formed in an embodiment of the present invention,
FIG. 4 is a schematic view of red paint spray-coating in a test area according to an embodiment of the present invention,
FIG. 5 is a schematic view showing the spreading of crushed stone in example 1 of the present invention,
fig. 6 is a schematic diagram of rolling of a rut plate in an embodiment of the invention.
Detailed Description
Example 1
The embodiment provides an indoor determination method for minimum gravel usage of a gravel seal layer by taking a non-stick wheel as an index, as shown in fig. 1 to 6: the method comprises the following specific steps:
s1, preparing a rut plate test piece
In this embodiment, a standard rut plate test piece of SMA-13 asphalt mixture is prepared according to road engineering asphalt and asphalt mixture test specification (JTG E20-2011), and the gradation is as follows: 1# basalt aggregate, 2# basalt aggregate, 4# basalt aggregate, mineral powder and wood fiber, wherein the weight ratio of the 1# basalt aggregate to the 2# basalt aggregate to the 4# basalt aggregate is 42 percent, 33 percent, 15 percent, 10 percent and 0.3 percent, and the oil stone ratio is 6 percent; mixing asphalt, mineral powder, fibers and aggregates in a mixing pot at 170 ℃, molding a test piece of 300mm multiplied by 50mm by a rut plate molding instrument, and placing the molded rut plate test piece and a test mold for 24 hours at room temperature for later use;
s2, preparing spreading macadam
The selected macadam is basalt aggregate with the grain size of 3-5 mm, 40%, 45%, 50% and 55% of the macadam usage amount in the spreading rate are weighed, and the macadam is placed into an oven at 170 ℃ for heating.
S3, preparing asphalt sheet forming die
Folding the silicone oil paper into the shape of an asphalt sheet forming die and placing the asphalt sheet forming die into the die;
s4, preparing the asphalt sheet
Firstly, putting SBS asphalt into a 170 ℃ oven to be heated until the asphalt is in a flowing state, putting a mould on an electric furnace to be heated, pouring the SBS asphalt into the mould when the mould is heated to 110 ℃, continuously heating until the asphalt is uniformly distributed at the bottom of the mould, taking the mould off the electric furnace, placing the mould in a room to be cooled, putting the mould and the asphalt into a-10 ℃ refrigerator to be cooled and insulated for 10min after the asphalt sheet is cooled to the room temperature, then demoulding the asphalt sheet, and preparing 4 asphalt sheets by the same method.
S5, paving an asphalt seal
And (3) sticking the prepared 4 asphalt sheets on the upper surface of the rut plate test piece to form an asphalt seal layer.
S6, determining a test area
Selecting a square area of 10cm multiplied by 10cm in the middle of each asphalt sheet as a test area, digging a square of 10cm multiplied by 10cm in the middle of 15cm multiplied by 15cm paper to finally form a square paper ring, adhering the cut square paper ring to the asphalt sheet, spraying red paint on the square paper ring, then removing the square paper ring, using the red paint area as the test area, and sequentially coating 4 test areas.
S7, spreading a gravel seal
And uniformly spreading the heated crushed stones with the crushed stone spreading rates of 40%, 45%, 50% and 55% on 4 test areas in sequence to form the crushed stone sealing layer.
S8, wheel grinding test
After the gravel spreading is finished, a square Bai Bugai with the area of 135cm multiplied by 135cm is used for being arranged on the gravel sealing layer, so that the white cloth is tightly attached to the track plate, and the accuracy of the result is guaranteed. And (4) placing the rutting plate on a rutting plate forming machine to roll for two times.
S9, determining the minimum gravel spreading rate of the seal
And (3) observing the appearances of the white cloths covered on different rubble spreading rates, wherein the white cloths are all stained with red paint, so that the steps S2-S9 are repeated, the rubble spreading rate in the step S2 is changed to 60%,65%,70% and 75%, and the appearances of the white cloths covered on different rubble spreading rates are observed, and 4 test areas are not stained with the red paint, so that the minimum rubble spreading rate is 60%.
Example 2
The embodiment provides an indoor determination method for minimum gravel usage of a gravel seal layer by taking a non-stick wheel as an index, as shown in fig. 1 to 6: the method comprises the following specific steps:
s1, preparing a rut plate test piece
In this example, a standard rut plate specimen of SMA-13 asphalt mixture was prepared according to the highway engineering asphalt and asphalt mixture test procedures (JTG E20-2011), and the gradation was: 1# basalt aggregate, 2# basalt aggregate, 4# basalt aggregate, mineral powder and wood fiber, wherein the weight ratio of the 1# basalt aggregate to the 2# basalt aggregate to the 4# basalt aggregate is 42 percent, 33 percent, 15 percent, 10 percent and 0.3 percent, and the oil stone ratio is 6 percent; mixing asphalt, mineral powder, fibers and aggregates in a mixing pot at 170 ℃, molding a test piece of 300mm multiplied by 50mm by a rut plate molding instrument, and placing the molded rut plate test piece and a test mold for 24 hours at room temperature for later use;
s2, preparing spreading gravels
The selected macadam is basalt aggregate with the grain diameter of 3-5 mm, 40%, 45%, 50% and 55% of the macadam dosage in spreading rate are weighed, and the obtained macadam is placed in an oven at the temperature of 170 ℃ for heating.
S3, preparing asphalt sheet forming die
Folding the silicone oil paper into the shape of an asphalt sheet forming die and putting the asphalt sheet forming die into the die;
s4, preparing the asphalt sheet
Firstly, putting SBS asphalt into a 170 ℃ oven to be heated until the asphalt is in a flowing state, putting a mould on an electric furnace to be heated, pouring the SBS asphalt into the mould when the mould is heated to 110 ℃, continuously heating until the asphalt is uniformly distributed at the bottom of the mould, taking the mould off the electric furnace, placing the mould in a room to be cooled, putting the mould and the asphalt into a-10 ℃ refrigerator to be cooled and insulated for 10min after the asphalt sheet is cooled to the room temperature, then demoulding the asphalt sheet, and preparing 4 asphalt sheets by the same method.
S5, paving asphalt seal
And (3) sticking the prepared 4 asphalt sheets on the upper surface of the rut plate test piece to form an asphalt seal layer.
S6, determining a test area
Selecting a square area of 10cm multiplied by 10cm in the middle of each asphalt sheet as a test area, digging a square with the area of 10cm multiplied by 10cm in the middle of 15cm multiplied by 15cm paper to finally form a square paper ring, attaching the cut square paper ring to the asphalt sheet, spraying red paint on the square paper ring, removing the square paper ring, using the red paint area as the test area, and sequentially coating 4 test areas.
S7, spreading a gravel seal
And uniformly spreading the heated crushed stones with the crushed stone spreading rates of 40%, 45%, 50% and 55% on 4 test areas in sequence to form a crushed stone seal.
S8, wheel milling test
After the gravel spreading is finished, a square Bai Bugai with the area of 135cm multiplied by 135cm is used for being arranged on the gravel sealing layer, so that the white cloth is tightly attached to the track plate, and the accuracy of the result is guaranteed. And (4) placing the rutting plate on a rutting plate forming machine to roll for two times.
S9, determining the minimum gravel spreading rate of the seal
And (3) observing the appearance of the white cloth covered on different rubble spreading rates, wherein the white cloth is not stained with red paint, so that the rubble spreading rates in the steps S2-S9 are repeated, wherein the rubble spreading rates in the step S2 are changed into 20%,25%,30% and 35%, observing the appearance of the white cloth covered on the different rubble spreading rates, and finding that the test areas with the spreading rates of 20% and 25% are sticky wheels, the test areas with the spreading rates of 30% and 35% are not sticky wheels, so that the minimum rubble spreading rate is 30%.
Example 3
The embodiment provides an indoor determination method for minimum gravel usage of a gravel seal layer by taking a non-stick wheel as an index, as shown in fig. 1 to 6: the method comprises the following specific steps:
s1, preparing a rut plate test piece
In this embodiment, a standard rut plate test piece of SMA-13 asphalt mixture is prepared according to road engineering asphalt and asphalt mixture test specification (JTG E20-2011), and the gradation is as follows: 1# basalt aggregate, 2# basalt aggregate, 4# basalt aggregate, mineral powder and wood fiber, wherein the weight ratio of the 1# basalt aggregate to the 2# basalt aggregate to the 4# basalt aggregate is 42 percent, 33 percent, 15 percent, 10 percent and 0.3 percent, and the oil stone ratio is 6 percent; mixing asphalt, mineral powder, fibers and aggregates in a mixing pot at 170 ℃, molding a test piece of 300mm multiplied by 50mm by a rut plate molding instrument, and placing the molded rut plate test piece and a test mold for 24 hours at room temperature for later use;
s2, preparing spreading gravels
The selected macadam is basalt aggregate with the grain diameter of 2-4 mm, 40%, 45%, 50% and 55% of the macadam dosage in spreading rate are weighed, and the obtained macadam is placed in an oven at 170 ℃ for heating.
S3, preparing asphalt sheet forming die
Folding the silicone oil paper into the shape of an asphalt sheet forming die and putting the asphalt sheet forming die into the die;
s4, preparing the asphalt sheet
Firstly, putting SBS asphalt into a 170 ℃ oven to be heated until the asphalt is in a flowing state, putting a mould on an electric furnace to be heated, pouring the SBS asphalt into the mould when the mould is heated to 110 ℃, continuously heating until the asphalt is uniformly distributed at the bottom of the mould, taking the mould off the electric furnace, placing the mould in a room to be cooled, putting the mould and the asphalt into a-10 ℃ refrigerator to be cooled and insulated for 10min after the asphalt sheet is cooled to the room temperature, then demoulding the asphalt sheet, and preparing 4 asphalt sheets by the same method.
S5, paving an asphalt seal layer
And (3) attaching the prepared 4 asphalt sheets to the upper surface of the rut plate test piece to form an asphalt seal layer.
S6, determining a test area
Selecting a square area of 10cm multiplied by 10cm in the middle of each asphalt sheet as a test area, digging a square with the area of 10cm multiplied by 10cm in the middle of 15cm multiplied by 15cm paper to finally form a square paper ring, attaching the cut square paper ring to the asphalt sheet, spraying red paint on the square paper ring, removing the square paper ring, using the red paint area as the test area, and sequentially coating 4 test areas.
S7, spreading a gravel seal
And uniformly spreading the heated crushed stones with the crushed stone spreading rates of 40%, 45%, 50% and 55% on 4 test areas in sequence to form the crushed stone sealing layer.
S8, wheel milling test
After the gravel spreading is finished, a square Bai Bugai with the area of 135cm multiplied by 135cm is used for being arranged on the gravel sealing layer, so that the white cloth is tightly attached to the track plate, and the accuracy of the result is guaranteed. The rut plate is placed on a rut plate forming machine to be rolled for two passes.
S9, determining the minimum gravel spreading rate of the seal
The appearance of the white cloth covered with the different crushed stone spreading rates was observed, the white cloth was stained with red paint, i.e., both were stuck to the wheel, and thus the crushed stone spreading rates in the steps S2 to S9 were repeated, S2 was changed to 60%,65%,70%,75%, and the appearance of the white cloth covered with the different crushed stone spreading rates was observed, and it was found that the test area of 75% spreading rate was not stuck to the wheel, and the test area of 60%,65%,70% spreading rate was stuck to the wheel, so that the minimum crushed stone spreading rate was 75%.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the present invention, and these modifications should also be construed as the protection scope of the present invention.
Claims (6)
1. A method for determining the minimum gravel using amount of a gravel seal is characterized by comprising the following steps:
step 1, forming a rut plate test piece by a wheel grinding method;
step 2, respectively weighing the scattered gravels with spreading rates of n%, n +5%, n +10% and n +15%, and placing the gravels into a 170 ℃ oven for heating for later use;
step 3, folding the silicone oil paper into the shape of an asphalt sheet forming die and placing the asphalt sheet forming die into the die;
step 4, putting the asphalt into an oven at 170 ℃ for heating, placing a forming die on an electric furnace for heating after the asphalt is in a flowing state, measuring the temperature by using an infrared warm gun in the heating process, pouring the asphalt into the die when the die is heated to 110 ℃, continuously heating to ensure that the asphalt is uniformly distributed in the die, taking the die off the electric furnace, placing the die in a room for cooling, placing the die and the asphalt into a refrigerator at-10 ℃ for cooling and preserving the heat for 10min after the asphalt sheet is cooled to the room temperature, then demoulding the asphalt sheet, and preparing 4 asphalt sheets by the same method;
step 5, sequentially attaching 4 asphalt thin plates to the asphalt mixture rut plate test piece to form an asphalt seal layer;
step 6, selecting 4 test areas on the asphalt seal coat, and spraying red paint respectively;
step 7, uniformly spreading the spreading crushed stones with the spreading rate of n%, n +5%, n +10%, n +15% and the spreading rate in 4 test areas in sequence;
step 8, covering the broken stone seal layer with white cloth after the broken stone spreading is finished, placing the rut plate on a rut plate forming machine for rolling for two times, and taking whether the white cloth is stained with red dye as a judgment basis for whether the asphalt is adhered to the wheel or not;
step 9, detaching the track plate from the forming machine, and checking whether the white cloth areas corresponding to the four test areas are stained with red paint, if so, the requirement of not sticking the wheel is not met, and if not, the requirement of not sticking the wheel is met; the minimum broken stone spreading rate judging method comprises the following steps:
(1) If the 4 test areas do not adhere to the wheel, preparing the asphalt seal again, selecting 4 test areas, and sequentially setting the gravel spreading rate to be n-20%, n-15%, n-10% and n-5%; selecting the maximum spreading rate of a wheel sticking test area plus 5 percent as the minimum broken stone spreading rate of the asphalt seal;
(2) If the 4 test areas are bonded with wheels, preparing an asphalt seal again, selecting 4 test areas, and sequentially setting the spreading rate of crushed stones to be n +20%, n +25%, n +30% and n +35%; selecting the minimum spreading rate of a wheel sticking prevention test area as the minimum broken stone spreading rate of the asphalt seal;
(3) And if the 4 test areas are provided with the sticky wheels and the non-sticky wheels, selecting the minimum gravel spreading rate of the non-sticky wheel test area as the minimum gravel spreading rate of the asphalt seal.
2. The method of claim 1, wherein the n%, n +5%, n +10%, n +15% gravel distribution rate of step 2 is 100% gravel distribution X kg/m when the gravel pack is full 2 Percentage of (c).
3. The method for determining the minimum gravel usage of the gravel pack of claim 1, wherein the asphalt sheet mold in step 3 is made of stainless steel and has a size of 150mm x 20mm.
4. The method for determining minimum macadam consumption of a macadam seal according to claim 1, wherein a layer of silicone oil paper is laid on the rut plate before the asphalt sheet is attached to the rut plate test piece in step 5, and then the asphalt sheet is attached, so that the rut plate test piece can be recycled.
5. The method for determining the minimum amount of gravel used for the gravel sealing as set forth in claim 1, wherein the test area is a square area of 10cm x 10cm in the middle of each asphalt sheet in step 6, the spraying treatment is performed by digging a square with an area of 10cm x 10cm in the middle of 15cm x 15cm of paper to finally form a square paper ring, the cut square paper ring is attached to the asphalt sheet, red paint is sprayed on the square paper ring, then the square paper ring is taken away, and the red paint area is used as the test area, and 4 test areas are sequentially sprayed.
6. The method for determining the minimum amount of gravel in the gravel pack as claimed in claim 1, wherein the white cloth should be closely attached to the rut plate in step 8 without wrinkling, thereby ensuring the accuracy of the result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110715692.8A CN113466019B (en) | 2021-06-25 | 2021-06-25 | Method for determining minimum gravel consumption of gravel seal |
Applications Claiming Priority (1)
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| CN107607429A (en) * | 2017-09-11 | 2018-01-19 | 南京林业大学 | The performance test methods and asphalt content of crushed stone sealing determine method |
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| CN213482245U (en) * | 2020-09-14 | 2021-06-18 | 中交建冀交高速公路投资发展有限公司 | Testing device for accurately and rapidly spreading broken stones in broken stone seal indoors |
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| CN107607429A (en) * | 2017-09-11 | 2018-01-19 | 南京林业大学 | The performance test methods and asphalt content of crushed stone sealing determine method |
| CN111896341A (en) * | 2020-07-06 | 2020-11-06 | 江西省交通工程集团建设有限公司 | Indoor forming method of gravel seal |
| CN213482245U (en) * | 2020-09-14 | 2021-06-18 | 中交建冀交高速公路投资发展有限公司 | Testing device for accurately and rapidly spreading broken stones in broken stone seal indoors |
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