CN103217361A - Method for measuring and calculating influence on high-temperature performance of asphalt caused by oil content - Google Patents
Method for measuring and calculating influence on high-temperature performance of asphalt caused by oil content Download PDFInfo
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- CN103217361A CN103217361A CN201310164549XA CN201310164549A CN103217361A CN 103217361 A CN103217361 A CN 103217361A CN 201310164549X A CN201310164549X A CN 201310164549XA CN 201310164549 A CN201310164549 A CN 201310164549A CN 103217361 A CN103217361 A CN 103217361A
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Abstract
The invention discloses a method for measuring and calculating the influence on high-temperature of asphalt caused by oil content, and relates to a method for measuring and calculating the high-temperature performance of asphalt for a road, which solves the problem of low efficiency when the influence on the high-temperature performance of the asphalt caused by the oil content in the existing process of producing the asphalt. The method comprises the steps of: 1. carrying out dynamic sine strain test on matrix asphalt by using a dynamic shear rhometer to obtain an index for representing the high-temperature performance of the asphalt; 2. carrying out dynamic sine strain test on modified asphalt I with low oil content by using the dynamic shear rhometer to obtain an index for representing the high-temperature performance of the asphalt; 3. carrying out dynamic sine strain test on modified asphalt II with high oil content by using the dynamic shear rhometer to obtain an index for representing the high-temperature performance of the asphalt; and 4. establishing a standard curve to obtain a regression equation and measuring and calculating the influence on the high-temperature performance of the asphalt caused by the oil content under the condition of any oil content mixing amount through the regression equation. The method can be used for measuring and calculating the influence on the high-temperature performance of the asphalt caused by the oil content.
Description
Technical field
The present invention relates to a kind of measuring method of bitumen for road use high-temperature behavior.
Background technology
In recent years, along with China's bituminous pavement large tracts of land is built, the demand of pitch and the quality of pitch have been proposed more and more higher requirement, the product that the character of adding oil content adjusting pitch satisfies standard with acquisition in pitch is one of method of producing pitch.Yet traditional method is: add certain oil content in pitch, and then its character is tested.This method can consume great deal of raw materials and time, is unfavorable for enhancing productivity.
Summary of the invention
The present invention will solve in the existing asphalt production process, and oil content influences the lower problem of test process efficient to high temperature performance of asphalt, and the measuring method of a kind of oil content to high temperature performance of asphalt is provided.
A kind of oil content of the present invention carries out according to the following steps to the measuring method of high temperature performance of asphalt:
One, matrix pitch being heated to the rubber cement shape is put on the circular parallel-plate that diameter is 25mm, spacing is 1.00mm between plate, utilize dynamic shear rheometer (DSR), according to carrying out dynamic sinusoidal strain test under the temperature T ℃ condition of intending obtaining product requirement, strain amplitude when carrying out the test of dynamic sinusoidal strain is 12%, frequency is 1.59Hz, obtains complex modulus G
A* with phasing degree δ
A, by calculating the index that characterizes high temperature performance of asphalt | G
A* |/sin δ
A, it is designated as A;
Two, matrix pitch is heated to 150 ℃, matrix pitch constant temperature to 150 ± 5 after utilizing heat-preserving equipment to heat ℃, the oil content that under this temperature conditions, in matrix pitch, adds matrix pitch quality 2%～4%, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 4000 rev/mins～5000 rev/mins the condition, promptly obtains the modified bitumen I;
Three, the modified bitumen I that step 2 is obtained is heated to the rubber cement shape and is put on the circular parallel-plate that diameter is 25mm, spacing is 1.00mm between plate, utilize dynamic shear rheometer (DSR), according to carrying out dynamic sinusoidal strain test under the temperature T ℃ condition of intending obtaining product requirement, strain amplitude when carrying out the test of dynamic sinusoidal strain is 12%, frequency is 1.59Hz, obtains complex modulus G
B* with phasing degree δ
B, by calculating the index that characterizes high temperature performance of asphalt | G
B* |/sin δ
B, it is designated as B;
Four, matrix pitch is heated to 150 ℃, matrix pitch constant temperature to 150 ± 5 after utilizing heat-preserving equipment to heat ℃, the oil content that under this temperature conditions, in matrix pitch, adds matrix pitch quality 7%～10%, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 4000 rev/mins～5000 rev/mins the condition, promptly obtains the modified bitumen II;
Five, the modified bitumen II that step 4 is obtained is heated to the rubber cement shape and is put on the circular parallel-plate that diameter is 25mm, spacing is 1.00mm between plate, utilize dynamic shear rheometer (DSR), according to carrying out dynamic sinusoidal strain test under the temperature T ℃ condition of intending obtaining product requirement, strain amplitude when carrying out the test of dynamic sinusoidal strain is 12%, frequency is 1.59Hz, obtains complex modulus G
C* with phasing degree δ
C, can be by calculating the index that characterizes high temperature performance of asphalt | G
C* |/sin δ
C, it is designated as C;
Six, the data that obtain of the data that obtain of the data that obtain according to step 1, step 3 and step 5, with the oil content volume is horizontal ordinate, to characterize the index of high temperature performance of asphalt | G*|/sin δ is an ordinate, ordinate is the denary logarithm scale, set up typical curve, and obtain monobasic once linear regression equation y=kx+b;
Seven, obtain parameter k and b after, promptly can be to oil content under any oil content volume condition to the measuring and calculating of high temperature performance of asphalt.
Plan described in step 1 of the present invention, step 3 and the step 5 obtains the temperature T of product requirement ℃ for requiring pitch to work under high temperature T ℃ condition, the temperature of experimental test also is T ℃.
The index of the sign high temperature performance of asphalt that step 1 of the present invention obtains | G
A* |/sin δ
ABe twice above parallel experiment result's mean value; The index of the sign high temperature performance of asphalt that step 3 obtains | G
B* |/sin δ
BBe twice above parallel experiment result's mean value; The index of the sign high temperature performance of asphalt that step 5 obtains | G
C* |/sin δ
CBe twice above parallel experiment result's mean value.
Advantage of the present invention: the present invention just can determine the influence curve of oil content to asphalt performance by three groups of tests, can carry out corresponding asphaltic products design by this curve, can significantly enhance productivity.
Description of drawings
Fig. 1 be the test one contain different oil content volumes and corresponding be the end with 10 | the logarithmic scale graph of a relation of G*|/sin δ.
Embodiment
Embodiment one: a kind of oil content of present embodiment carries out according to the following steps to the measuring method of high temperature performance of asphalt:
One, matrix pitch being heated to the rubber cement shape is put on the circular parallel-plate that diameter is 25mm, spacing is 1.00mm between plate, utilize dynamic shear rheometer (DSR), according to carrying out dynamic sinusoidal strain test under the temperature T ℃ condition of intending obtaining product requirement, strain amplitude when carrying out the test of dynamic sinusoidal strain is 12%, frequency is 1.59Hz, obtains complex modulus G
A* with phasing degree δ
A, by calculating the index that characterizes high temperature performance of asphalt | G
A* |/sin δ
A, it is designated as A;
Two, matrix pitch is heated to 150 ℃, matrix pitch constant temperature to 150 ± 5 after utilizing heat-preserving equipment to heat ℃, the oil content that under this temperature conditions, in matrix pitch, adds matrix pitch quality 2%～4%, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 4000 rev/mins～5000 rev/mins the condition, promptly obtains the modified bitumen I;
Three, the modified bitumen I that step 2 is obtained is heated to the rubber cement shape and is put on the circular parallel-plate that diameter is 25mm, spacing is 1.00mm between plate, utilize dynamic shear rheometer (DSR), according to carrying out dynamic sinusoidal strain test under the temperature T ℃ condition of intending obtaining product requirement, strain amplitude when carrying out the test of dynamic sinusoidal strain is 12%, frequency is 1.59Hz, obtains complex modulus G
B* with phasing degree δ
B, by calculating the index that characterizes high temperature performance of asphalt | G
B* |/sin δ
B, it is designated as B;
Four, matrix pitch is heated to 150 ℃, matrix pitch constant temperature to 150 ± 5 after utilizing heat-preserving equipment to heat ℃, the oil content that under this temperature conditions, in matrix pitch, adds matrix pitch quality 7%～10%, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 4000 rev/mins～5000 rev/mins the condition, promptly obtains the modified bitumen II;
Five, the modified bitumen II that step 4 is obtained is heated to the rubber cement shape and is put on the circular parallel-plate that diameter is 25mm, spacing is 1.00mm between plate, utilize dynamic shear rheometer (DSR), according to carrying out dynamic sinusoidal strain test under the temperature T ℃ condition of intending obtaining product requirement, strain amplitude when carrying out the test of dynamic sinusoidal strain is 12%, frequency is 1.59Hz, obtains complex modulus G
C* with phasing degree δ
C, can be by calculating the index that characterizes high temperature performance of asphalt | G
C* |/sin δ
C, it is designated as C;
Six, the data that obtain of the data that obtain of the data that obtain according to step 1, step 3 and step 5, with the oil content volume is horizontal ordinate, to characterize the index of high temperature performance of asphalt | G*|/sin δ is an ordinate, ordinate is the denary logarithm scale, set up typical curve, and obtain monobasic once linear regression equation y=kx+b;
Seven, obtain parameter k and b after, promptly can be to the measuring and calculating of oil content under any oil content volume condition to high temperature performance of asphalt influence.
Plan described in present embodiment step 1, step 3 and the step 5 obtains the temperature T of product requirement ℃ for requiring pitch to work under high temperature T ℃ condition, the temperature of experimental test also is T ℃.
The index of the sign high temperature performance of asphalt that the present embodiment step 1 obtains | G
A* |/sin δ
ABe twice above parallel experiment result's mean value; The index of the sign high temperature performance of asphalt that step 3 obtains | G
B* |/sin δ
BBe twice above parallel experiment result's mean value; The index of the sign high temperature performance of asphalt that step 5 obtains | G
C* |/sin δ
CBe twice above parallel experiment result's mean value.
Present embodiment just can be determined the influence curve of oil content to asphalt performance by three groups of tests, can carry out corresponding asphaltic products design by this curve, can significantly enhance productivity.
Embodiment two: what present embodiment and embodiment one were different is: in the step 1 matrix pitch is heated to the rubber cement shape and is put on the circular parallel-plate that diameter is 25mm, spacing is 1.00mm between plate, utilize dynamic shear rheometer (DSR), according to carrying out dynamic sinusoidal strain test under the temperature T ℃ condition of intending obtaining product requirement, strain amplitude when carrying out the test of dynamic sinusoidal strain is 12%, frequency is 1.59Hz, obtains complex modulus G
A1With the phasing degree be δ
A1, by calculating the index that characterizes high temperature performance of asphalt | G
A1|/sin δ
A1Repeat above-mentioned steps, obtain complex modulus G
A2With phasing degree δ
A2By calculating the index that characterizes high temperature performance of asphalt | G
A2|/sin δ
A2, obtain | G
A1|/sin δ
A1With | G
A2|/sin δ
A2Mean value, it is designated as A.Other is identical with embodiment one.
Embodiment three: what present embodiment was different with embodiment one or two is: described in the step 2 matrix pitch is heated to 150 ℃, matrix pitch constant temperature to 150 ± 5 after utilizing heat-preserving equipment to heat ℃, the oil content that under this temperature conditions, in matrix pitch, adds matrix pitch quality 2%, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 4500 rev/mins the condition, promptly obtains the modified bitumen I.Other is identical with embodiment one or two.
Embodiment four: what present embodiment was different with one of embodiment one to three is: described in the step 2 matrix pitch is heated to 150 ℃, matrix pitch constant temperature to 150 ± 5 after utilizing heat-preserving equipment to heat ℃, the oil content that under this temperature conditions, in matrix pitch, adds matrix pitch quality 3%, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 4500 rev/mins the condition, promptly obtains the modified bitumen I.Other is identical with one of embodiment one to three.
Embodiment five: what present embodiment was different with one of embodiment one to four is: heat-preserving equipment described in the step 2 is the controllable temperature electric furnace; High-speed mixing equipment described in the step 2 is a high-speed shearing machine.Other is identical with one of embodiment one to four.
Embodiment six: what present embodiment was different with one of embodiment one to five is: the modified bitumen I that in the step 3 step 2 is obtained is heated to the rubber cement shape and is put on the circular parallel-plate that diameter is 25mm, spacing is 1.00mm between plate, utilize dynamic shear rheometer (DSR), according to carrying out dynamic sinusoidal strain test under the temperature T ℃ condition of intending obtaining product requirement, strain amplitude when carrying out the test of dynamic sinusoidal strain is 12%, frequency is 1.59Hz, obtains complex modulus G
B1* with phasing degree δ
B1, by calculating the index that characterizes high temperature performance of asphalt | G
B1* |/sin δ
B1Repeat above-mentioned steps, obtain complex modulus G
B2* be and phasing degree δ
B2, by calculating the index that characterizes high temperature performance of asphalt | G
B2* |/sin δ
B2, obtain | G
B1* |/sin δ
B1With | G
B2* |/sin δ
B2Mean value, it is designated as B.Other is identical with one of embodiment one to five.
Embodiment seven: what present embodiment was different with one of embodiment one to six is: described in the step 4 matrix pitch is heated to 150 ℃, matrix pitch constant temperature to 150 ± 5 after utilizing heat-preserving equipment to heat ℃, the oil content that under this temperature conditions, in matrix pitch, adds matrix pitch quality 8%, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 4500 rev/mins the condition, promptly obtains the modified bitumen II.Other is identical with one of embodiment one to six.
Embodiment eight: what present embodiment was different with one of embodiment one to seven is: described in the step 4 matrix pitch is heated to 150 ℃, matrix pitch constant temperature to 150 ± 5 after utilizing heat-preserving equipment to heat ℃, the oil content that under this temperature conditions, in matrix pitch, adds matrix pitch quality 10%, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 4500 rev/mins the condition, promptly obtains the modified bitumen II.Other is identical with one of embodiment one to seven.
Embodiment nine: what present embodiment was different with one of embodiment one to eight is: heat-preserving equipment described in the step 4 is the controllable temperature electric furnace; High-speed mixing equipment described in the step 4 is a high-speed shearing machine.Other is identical with one of embodiment one to eight.
Embodiment ten: what present embodiment was different with one of embodiment one to nine is: the modified bitumen II that in the step 5 step 4 is obtained is heated to the rubber cement shape and is put on the circular parallel-plate that diameter is 25mm, spacing is 1.00mm between plate, utilize dynamic shear rheometer (DSR), according to carrying out dynamic sinusoidal strain test under the temperature T ℃ condition of intending obtaining product requirement, strain amplitude when carrying out the test of dynamic sinusoidal strain is 12%, frequency is 1.59Hz, obtains complex modulus G
C1* with phasing degree δ
C1, can be by calculating the index that characterizes high temperature performance of asphalt | G
C1* |/sin δ
C1Repeat above-mentioned steps, obtain complex modulus G
C2* with phasing degree δ
C2, can be by calculating the index that characterizes high temperature performance of asphalt | G
C2* |/sin δ
C2, obtain | G
C1* |/sin δ
C1With | G
C2* |/sin δ
C2Mean value, it is designated as C.Other is identical with one of embodiment one to nine.
Adopt following verification experimental verification effect of the present invention:
Test one: a kind of oil content carries out according to the following steps to the measuring method of high temperature performance of asphalt:
One, matrix pitch being heated to the rubber cement shape is put on the circular parallel-plate that diameter is 25mm, spacing is 1.00mm between plate, utilize dynamic shear rheometer (DSR), be to carry out dynamic sinusoidal strain test under 58 ℃ the condition in temperature, strain amplitude when carrying out the test of dynamic sinusoidal strain is 12%, frequency is 1.59Hz, obtains complex modulus G
A1Be 3.352kPa, the phasing degree is δ
A1Be 85.45 °, by calculating the index that characterizes high temperature performance of asphalt | G
A1|/sin δ
A1Be 3.363kPa; Repeat above-mentioned steps, obtain complex modulus G
A2Be 3.331kPa, phasing degree δ
A2Be 85.45 °, by calculating the index that characterizes high temperature performance of asphalt | G
A2|/sin δ
A2Be 3.341kPa, obtain | G
A1|/sin δ
A1With | G
A2|/sin δ
A2Mean value be 3.352kPa, it is designated as A;
Two, matrix pitch is heated to 150 ℃, matrix pitch constant temperature to 150 ± 5 after utilizing the controllable temperature electric furnace to heat ℃, the oil content that under this temperature conditions, in matrix pitch, adds matrix pitch quality 4%, utilizing the high-speed shearing machine low whipping speed then is to stir 30min under 4500 rev/mins the condition, promptly obtains the modified bitumen I;
Three, the modified bitumen I that step 2 is obtained is heated to the rubber cement shape and is put on the circular parallel-plate that diameter is 25mm, spacing is 1.00mm between plate, utilize dynamic shear rheometer (DSR), be to carry out dynamic sinusoidal strain test under 58 ℃ the condition in temperature, strain amplitude when carrying out the test of dynamic sinusoidal strain is 12%, frequency is 1.59Hz, obtains complex modulus G
B1* be 1.868kPa, phasing degree δ
B1Be 86.28 °, by calculating the index that characterizes high temperature performance of asphalt | G
B1* |/sin δ
B1Be 1.871kPa; Repeat above-mentioned steps, obtain complex modulus G
B2* be 1.846kPa, phasing degree δ
B2Be 86.28 °, by calculating the index that characterizes high temperature performance of asphalt | G
B2* |/sin δ
B2Be 1.849kPa, obtain | G
B1* |/sin δ
B1With | G
B2* |/sin δ
B2Mean value be 1.860kPa, it is designated as B;
Four, matrix pitch is heated to 150 ℃, matrix pitch constant temperature to 150 ± 5 after utilizing the controllable temperature electric furnace to heat ℃, the oil content that under this temperature conditions, in matrix pitch, adds matrix pitch quality 8%, utilizing the high-speed shearing machine low whipping speed then is 4500 rev/min 4500) condition under stir 30min, promptly obtain the modified bitumen II;
Five, the modified bitumen II that step 4 is obtained is heated to the rubber cement shape and is put on the circular parallel-plate that diameter is 25mm, spacing is 1.00mm between plate, utilize dynamic shear rheometer (DSR), be to carry out dynamic sinusoidal strain test under 58 ℃ the condition in temperature, strain amplitude when carrying out the test of dynamic sinusoidal strain is 12%, frequency is 1.59Hz, obtains complex modulus G
C1* be 1.175kPa, phasing degree δ
C1Be 87.72 °, can be by calculating the index that characterizes high temperature performance of asphalt | G
C1* |/sin δ
C1Be 1.175kPa; Repeat above-mentioned steps, obtain complex modulus G
C2* be 1.166kPa, phasing degree δ
C2Be 87.72 °, can be by calculating the index that characterizes high temperature performance of asphalt | G
C2* |/sin δ
C2Be 1.166kPa, obtain | G
C1* |/sin δ
C1With | G
C2* |/sin δ
C2Mean value be 1.171kPa, it is designated as C;
Six, the data 1.171kPa that obtains of the data 1.860kPa that obtains of the data 3.352kPa that obtains according to step 1, step 3 and step 5, with the oil content volume is horizontal ordinate, to characterize the index of high temperature performance of asphalt | G*|/sin δ is an ordinate, ordinate is the denary logarithm scale, set up typical curve, and obtain monobasic once linear regression equation y=0.51922-0.05713*x;
Seven, obtaining parameter k is-0.05713, and b is 0.51922, promptly can be to oil content under any oil content volume condition to the measuring and calculating of high temperature performance of asphalt.
If the high temperature index of pitch when temperature is 58 ℃ that requires to produce is 1.5kPa, can determine the volume of oil content in the following way: Lg (1.5)=0.51922-0.05713*x, try to achieve x and be about 6, the oil content that promptly adds asphalt quality 6% can obtain the asphaltic products that high temperature index is 1.5kPa.
Claims (10)
1. an oil content is characterized in that to the measuring method of high temperature performance of asphalt oil content carries out according to the following steps to the measuring method of high temperature performance of asphalt:
One, matrix pitch being heated to the rubber cement shape is put on the circular parallel-plate that diameter is 25mm, spacing is 1.00mm between plate, utilize dynamic shear rheometer, according to carrying out dynamic sinusoidal strain test under the temperature T ℃ condition of intending obtaining product requirement, strain amplitude when carrying out the test of dynamic sinusoidal strain is 12%, frequency is 1.59Hz, obtains complex modulus G
A* with phasing degree δ
A, by calculating the index that characterizes high temperature performance of asphalt | G
A* |/sin δ
A, it is designated as A;
Two, matrix pitch is heated to 150 ℃, matrix pitch constant temperature to 150 ± 5 after utilizing heat-preserving equipment to heat ℃, the oil content that under this temperature conditions, in matrix pitch, adds matrix pitch quality 2%～4%, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 4000 rev/mins～5000 rev/mins the condition, promptly obtains the modified bitumen I;
Three, the modified bitumen I that step 2 is obtained is heated to the rubber cement shape and is put on the circular parallel-plate that diameter is 25mm, spacing is 1.00mm between plate, utilize dynamic shear rheometer, according to carrying out dynamic sinusoidal strain test under the temperature T ℃ condition of intending obtaining product requirement, strain amplitude when carrying out the test of dynamic sinusoidal strain is 12%, frequency is 1.59Hz, obtains complex modulus G
B* with phasing degree δ
B, by calculating the index that characterizes high temperature performance of asphalt | G
B* |/sin δ
B, it is designated as B;
Four, matrix pitch is heated to 150 ℃, matrix pitch constant temperature to 150 ± 5 after utilizing heat-preserving equipment to heat ℃, the oil content that under this temperature conditions, in matrix pitch, adds matrix pitch quality 7%～10%, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 4000 rev/mins～5000 rev/mins the condition, promptly obtains the modified bitumen II;
Five, the modified bitumen II that step 4 is obtained is heated to the rubber cement shape and is put on the circular parallel-plate that diameter is 25mm, spacing is 1.00mm between plate, utilize dynamic shear rheometer, according to carrying out dynamic sinusoidal strain test under the temperature T ℃ condition of intending obtaining product requirement, strain amplitude when carrying out the test of dynamic sinusoidal strain is 12%, frequency is 1.59Hz, obtains complex modulus G
C* with phasing degree δ
C, can be by calculating the index that characterizes high temperature performance of asphalt | G
C* |/sin δ
C, it is designated as C;
Six, the data that obtain of the data that obtain of the data that obtain according to step 1, step 3 and step 5, with the oil content volume is horizontal ordinate, to characterize the index of high temperature performance of asphalt | G*|/sin δ is an ordinate, ordinate is the denary logarithm scale, set up typical curve, and obtain monobasic once linear regression equation y=kx+b;
Seven, obtain parameter k and b after, promptly can be to oil content under any oil content volume condition to the measuring and calculating of high temperature performance of asphalt.
2. a kind of oil content according to claim 1 is to the measuring method of high temperature performance of asphalt, it is characterized in that in the step 1 matrix pitch being heated to the rubber cement shape is put on the circular parallel-plate that diameter is 25mm, spacing is 1.00mm between plate, utilize dynamic shear rheometer, according to carrying out dynamic sinusoidal strain test under the temperature T ℃ condition of intending obtaining product requirement, strain amplitude when carrying out the test of dynamic sinusoidal strain is 12%, and frequency is 1.59Hz, obtains complex modulus G
A1With the phasing degree be δ
A1, by calculating the index that characterizes high temperature performance of asphalt | G
A1|/sin δ
A1Repeat above-mentioned steps, obtain complex modulus G
A2With phasing degree δ
A2By calculating the index that characterizes high temperature performance of asphalt | G
A2|/sin δ
A2, obtain | G
A1|/sin δ
A1With | G
A2|/sin δ
A2Mean value, it is designated as A.
3. a kind of oil content according to claim 1 and 2 is to the measuring method of high temperature performance of asphalt, it is characterized in that described in the step 2 matrix pitch being heated to 150 ℃, matrix pitch constant temperature to 150 ± 5 after utilizing heat-preserving equipment to heat ℃, the oil content that under this temperature conditions, in matrix pitch, adds matrix pitch quality 2%, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 4500 rev/mins the condition, promptly obtains the modified bitumen I.
4. a kind of oil content according to claim 3 is to the measuring method of high temperature performance of asphalt, it is characterized in that described in the step 2 matrix pitch being heated to 150 ℃, matrix pitch constant temperature to 150 ± 5 after utilizing heat-preserving equipment to heat ℃, the oil content that under this temperature conditions, in matrix pitch, adds matrix pitch quality 3%, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 4500 rev/mins the condition, promptly obtains the modified bitumen I.
5. a kind of oil content according to claim 4 is characterized in that to the measuring method of high temperature performance of asphalt heat-preserving equipment described in the step 2 is the controllable temperature electric furnace; High-speed mixing equipment described in the step 2 is a high-speed shearing machine.
6. according to claim 4 or 5 described a kind of oil contents measuring method to high temperature performance of asphalt, it is characterized in that the modified bitumen I that in the step 3 step 2 is obtained is heated to the rubber cement shape and is put on the circular parallel-plate that diameter is 25mm, spacing is 1.00mm between plate, utilize dynamic shear rheometer, according to carrying out dynamic sinusoidal strain test under the temperature T ℃ condition of intending obtaining product requirement, strain amplitude when carrying out the test of dynamic sinusoidal strain is 12%, and frequency is 1.59Hz, obtains complex modulus G
B1* with phasing degree δ
B1, by calculating the index that characterizes high temperature performance of asphalt | G
B1* |/sin δ
B1Repeat above-mentioned steps, obtain complex modulus G
B2* be and phasing degree δ
B2, by calculating the index that characterizes high temperature performance of asphalt | G
B2* |/sin δ
B2, obtain | G
B1* |/sin δ
B1With | G
B2* |/sin δ
B2Mean value, it is designated as B.
7. a kind of oil content according to claim 6 is to the measuring method of high temperature performance of asphalt, it is characterized in that described in the step 4 matrix pitch being heated to 150 ℃, matrix pitch constant temperature to 150 ± 5 after utilizing heat-preserving equipment to heat ℃, the oil content that under this temperature conditions, in matrix pitch, adds matrix pitch quality 8%, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 4500 rev/mins the condition, promptly obtains the modified bitumen II.
8. a kind of oil content according to claim 7 is to the measuring method of high temperature performance of asphalt, it is characterized in that described in the step 4 matrix pitch being heated to 150 ℃, matrix pitch constant temperature to 150 ± 5 after utilizing heat-preserving equipment to heat ℃, the oil content that under this temperature conditions, in matrix pitch, adds matrix pitch quality 10%, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 4500 rev/mins the condition, promptly obtains the modified bitumen II.
According to claim 7 or 8 described a kind of oil contents to the measuring method of high temperature performance of asphalt, it is characterized in that heat-preserving equipment described in the step 4 is the controllable temperature electric furnace; High-speed mixing equipment described in the step 4 is a high-speed shearing machine.
10. a kind of oil content according to claim 9 is to the measuring method of high temperature performance of asphalt, it is characterized in that the modified bitumen II that in the step 5 step 4 is obtained is heated to the rubber cement shape and is put on the circular parallel-plate that diameter is 25mm, spacing is 1.00mm between plate, utilize dynamic shear rheometer, according to carrying out dynamic sinusoidal strain test under the temperature T ℃ condition of intending obtaining product requirement, strain amplitude when carrying out the test of dynamic sinusoidal strain is 12%, and frequency is 1.59Hz, obtains complex modulus G
C1* with phasing degree δ
C1, can be by calculating the index that characterizes high temperature performance of asphalt | G
C1* |/sin δ
C1Repeat above-mentioned steps, obtain complex modulus G
C2* with phasing degree δ
C2, can be by calculating the index that characterizes high temperature performance of asphalt | G
C2* |/sin δ
C2, obtain | G
C1* |/sin δ
C1With | G
C2* |/sin δ
C2Mean value, it is designated as C.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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|---|---|---|---|---|
| CN103616314A (en) * | 2013-09-12 | 2014-03-05 | 河海大学 | Evaluation method for temperature sensitivity based on asphalt cement |
| CN107209166A (en) * | 2015-01-22 | 2017-09-26 | Bp北美公司 | method for predicting asphaltene precipitation |
| CN106290066A (en) * | 2016-08-04 | 2017-01-04 | 长安大学 | A kind of determination method of asphalt mastic filler critical volume fraction |
| CN106290066B (en) * | 2016-08-04 | 2019-01-11 | 长安大学 | A kind of determination method of asphalt mastic filler critical volume fraction |
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