CN103234842A - Method for measuring and calculating influence on low-temperature performance of asphalt caused by oil content - Google Patents
Method for measuring and calculating influence on low-temperature performance of asphalt caused by oil content Download PDFInfo
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- CN103234842A CN103234842A CN2013101645466A CN201310164546A CN103234842A CN 103234842 A CN103234842 A CN 103234842A CN 2013101645466 A CN2013101645466 A CN 2013101645466A CN 201310164546 A CN201310164546 A CN 201310164546A CN 103234842 A CN103234842 A CN 103234842A
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Abstract
The invention discloses a method for measuring and calculating an influence on the low-temperature performance of asphalt caused by oil content, and relates to a method for measuring and calculating the influence of the oil content on the low-temperature performance of road asphalt. The method aims at solving the problem that the efficiency of a testing process of the influence on the low-temperature performance of the asphalt caused by the oil content is low in the existing asphalt production process. The method comprises the steps that 1. a specimen of matrix asphalt is prepared, and subjected to a creep test, and the stiffness modulus of the specimen and a change rate of a 60-second modulus are obtained; 2. a modified asphalt I specimen with low oil content is prepared, and subjected to the creep test, and the stiffness modulus of the modified asphalt I specimen and a change rate of the 60-second modulus are obtained; 3. a modified asphalt II specimen with high oil content is prepared, and subjected to the creep test, and the stiffness modulus of the modified asphalt II specimen and a change rate of the 60-second modulus are obtained; and 4. a standard curve is established to obtain a regression equation, and the influence on the low-temperature performance of the asphalt caused by the oil content under any oil content mixing amount condition can be measured and calculated with the regression equation. The method can be used for measuring and calculating the influence on the low-temperature performance of the asphalt caused by the oil content.
Description
Technical field
The present invention relates to a kind of satisfying the need with the measuring method of pitch cryogenic property.
Background technology
The Pavement Low cracking is the ubiquitous problem of the northern area of China, also is the baptism that the countries in the world bituminous pavement faces.In order to solve Pavement Low cracking problem, a kind of method is exactly to improve the flowing property of pitch by a certain amount of oil content of adding in pitch, and then reduces the crack that bituminous pavement causes when temperature decrease.In order to determine the volume of rational oil content, 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 the pitch cryogenic property, and the measuring method of a kind of oil content to the pitch cryogenic property is provided.
A kind of oil content of the present invention carries out according to the following steps to the measuring method of pitch cryogenic property:
One, pour in the bent beam flow graph test piece mould after matrix pitch being heated to the rubber cement shape, treat that matrix pitch is down to room temperature after, carry out the demoulding, test specimen is standby;
Two, the test specimen that step 1 is prepared is put into the bent beam flow graph and was carried out constant temperature one hour, and the temperature of constant temperature is the temperature T intending obtaining product specification and require ℃, after constant temperature is finished, test specimen is carried out creep test, obtains the stiffness modulus A of material
1The rate of change B of modulus during with 60 seconds
1
Three, 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, adds matrix pitch quality 2%～4% in the matrix pitch, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 4000 rev/mins～5000 rev/mins the condition, namely obtains the modified bitumen I;
Four, the modified bitumen I that step 3 is obtained is poured in the bent beam flow graph test piece mould after being heated to the rubber cement shape, after treating that the modified bitumen I is down to room temperature, carry out the demoulding, test specimen is standby, then the test specimen for preparing is put into the bent beam flow graph and carried out constant temperature one hour, the temperature of constant temperature is the temperature T intending obtaining product specification and require ℃, after constant temperature is finished, test specimen is carried out creep test, obtain the stiffness modulus A of material
2The rate of change B of modulus during with 60 seconds
2
Five, 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, adds matrix pitch quality 7%～15% in the matrix pitch, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 4000 rev/mins～5000 rev/mins the condition, namely obtains the modified bitumen II;
Six, the modified bitumen II that step 5 is obtained is heated to the rubber cement shape and pours in the bent beam flow graph test piece mould, after treating that the modified bitumen II is down to room temperature, carry out the demoulding, test specimen is standby, then the test specimen for preparing is put into the bent beam flow graph and carried out constant temperature one hour, the temperature of constant temperature is the temperature T intending obtaining product specification and require ℃, after constant temperature is finished, test specimen is carried out creep test, obtain the stiffness modulus A of material
3The rate of change B of modulus during with 60 seconds
3
Seven, the data that obtain according to step 2, step 4 and step 6 are horizontal ordinate with the oil content volume, and corresponding stiffness modulus is ordinate, and ordinate is the denary logarithm scale, sets up typical curve, and obtain equation of linear regression y=k
1X+b
1, obtain parameter k
1And b
1After, namely can be under any oil content volume condition, oil content is to the measuring and calculating of pitch modulus;
Eight, the data that obtain according to step 2, step 4 and step 6 are horizontal ordinate with the oil content volume, and the rate of change of modulus is ordinate in the time of corresponding 60 seconds, and ordinate is the denary logarithm scale, sets up typical curve, and obtain equation of linear regression y=k
2X+b
2, obtain parameter k
2And b
2After, namely can be under any oil content volume condition, oil content is to the measuring and calculating of pitch modulus change rate in the time of 60 seconds;
Nine, the equation of linear regression y=k that obtains of integrating step seven
1X+b
1The equation of linear regression y=k that obtains with step 8
2X+b
2, namely can be to oil content under any oil content volume condition to the measuring and calculating of pitch cryogenic property.
Plan described in the step 2 of the present invention obtains the temperature of product specification requirement and can work under low temperature T ℃ condition for requiring pitch, and the temperature of experimental test also is T ℃; Plan described in the step 4 obtains the temperature of product specification requirement and can work under low temperature T ℃ condition for requiring pitch, and the temperature of experimental test also is T ℃; Plan described in the step 6 obtains the temperature of product specification requirement and can work under low temperature T ℃ condition for requiring pitch, and the temperature of experimental test also is T ℃.
The stiffness modulus A of the material described in the step 2 of the present invention
1The rate of change B of modulus during with 60 seconds
1Be twice above parallel experiment result's mean value; The stiffness modulus A of the material described in the step 4
2The rate of change B of modulus during with 60 seconds
2Be twice above parallel experiment result's mean value; The stiffness modulus A of the material described in the step 6
3The rate of change B of modulus during with 60 seconds
3Be twice above parallel experiment result's mean value.
Advantage of the present invention: the present invention just can determine oil content to the influence curve of 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 calculates curve map for test one pitch measures at-18 ℃ of condition counterdies;
Fig. 2 is test one pitch modulus change rate measuring and calculating curve map under-18 ℃ of conditions.
Embodiment
Embodiment one: a kind of oil content of present embodiment carries out according to the following steps to the measuring method of pitch cryogenic property:
One, pour in the bent beam flow graph test piece mould after matrix pitch being heated to the rubber cement shape, treat that matrix pitch is down to room temperature after, carry out the demoulding, test specimen is standby;
Two, the test specimen that step 1 is prepared is put into the bent beam flow graph and was carried out constant temperature one hour, and the temperature of constant temperature is the temperature T intending obtaining product specification and require ℃, after constant temperature is finished, test specimen is carried out creep test, obtains the stiffness modulus A of material
1The rate of change B of modulus during with 60 seconds
1
Three, 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, adds matrix pitch quality 2%～4% in the matrix pitch, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 4000 rev/mins～5000 rev/mins the condition, namely obtains the modified bitumen I;
Four, the modified bitumen I that step 3 is obtained is poured in the bent beam flow graph test piece mould after being heated to the rubber cement shape, after treating that the modified bitumen I is down to room temperature, carry out the demoulding, test specimen is standby, then the test specimen for preparing is put into the bent beam flow graph and carried out constant temperature one hour, the temperature of constant temperature is the temperature T intending obtaining product specification and require ℃, after constant temperature is finished, test specimen is carried out creep test, obtain the stiffness modulus A of material
2The rate of change B of modulus during with 60 seconds
2
Five, 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, adds matrix pitch quality 7%～15% in the matrix pitch, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 4000 rev/mins～5000 rev/mins the condition, namely obtains the modified bitumen II;
Six, the modified bitumen II that step 5 is obtained is heated to the rubber cement shape and pours in the bent beam flow graph test piece mould, after treating that the modified bitumen II is down to room temperature, carry out the demoulding, test specimen is standby, then the test specimen for preparing is put into the bent beam flow graph and carried out constant temperature one hour, the temperature of constant temperature is the temperature T intending obtaining product specification and require ℃, after constant temperature is finished, test specimen is carried out creep test, obtain the stiffness modulus A of material
3The rate of change B of modulus during with 60 seconds
3
Seven, the data that obtain according to step 2, step 4 and step 6 are horizontal ordinate with the oil content volume, and corresponding stiffness modulus is ordinate, and ordinate is the denary logarithm scale, sets up typical curve, and obtain equation of linear regression y=k
1X+b
1, obtain parameter k
1And b
1After, namely can be under any oil content volume condition, oil content is to the measuring and calculating of pitch modulus;
Eight, the data that obtain according to step 2, step 4 and step 6 are horizontal ordinate with the oil content volume, and the rate of change of modulus is ordinate in the time of corresponding 60 seconds, and ordinate is the denary logarithm scale, sets up typical curve, and obtain equation of linear regression y=k
2X+b
2, obtain parameter k
2And b
2After, namely can be under any oil content volume condition, oil content is to the measuring and calculating of pitch modulus change rate in the time of 60 seconds;
Nine, the equation of linear regression y=k that obtains of integrating step seven
1X+b
1The equation of linear regression y=k that obtains with step 8
2X+b
2, namely can be to oil content under any oil content volume condition to the measuring and calculating of pitch cryogenic property.
Plan described in the present embodiment step 2 obtains the temperature of product specification requirement and can work under low temperature T ℃ condition for requiring pitch, and the temperature of experimental test also is T ℃; Plan described in the step 4 obtains the temperature of product specification requirement and can work under low temperature T ℃ condition for requiring pitch, and the temperature of experimental test also is T ℃; Plan described in the step 6 obtains the temperature of product specification requirement and can work under low temperature T ℃ condition for requiring pitch, and the temperature of experimental test also is T ℃.
The stiffness modulus A of the material described in the present embodiment step 2
1The rate of change B of modulus during with 60 seconds
1Be twice above parallel experiment result's mean value; The stiffness modulus A of the material described in the step 4
2The rate of change B of modulus during with 60 seconds
2Be twice above parallel experiment result's mean value; The stiffness modulus A of the material described in the step 6
3The rate of change B of modulus during with 60 seconds
3Be twice above parallel experiment result's mean value.
Present embodiment just can be determined oil content to the influence curve of 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: the test specimen that in the step 2 step 1 is prepared is put into the bent beam flow graph and was carried out constant temperature one hour, the temperature of constant temperature is the temperature T intending obtaining product specification and require ℃, after constant temperature is finished, test specimen is carried out creep test, obtain the stiffness modulus A of material
11The rate of change B of modulus during with 60 seconds
11Repeat above-mentioned steps, obtain the stiffness modulus A of material
12The rate of change B of modulus during with 60 seconds
12, by calculating stiffness modulus A
11With stiffness modulus A
12Mean value note make A
1, the rate of change B of modulus when calculating 60 seconds
11The rate of change B of modulus during with 60 seconds
12Mean value note make B
1Other is identical with embodiment one.
Embodiment three: what present embodiment was different with embodiment one or two is: in the step 3 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, adds matrix pitch quality 3% in the matrix pitch, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 4000 rev/mins the condition, namely 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: in the step 3 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, adds matrix pitch quality 4% in the matrix pitch, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 4500 rev/mins the condition, namely 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: the heat-preserving equipment described in the step 3 is the controllable temperature electric furnace; High-speed mixing equipment described in the step 3 is 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 4 step 3 is obtained is poured in the bent beam flow graph test piece mould after being heated to the rubber cement shape, after treating that the modified bitumen I is down to room temperature, carry out the demoulding, test specimen is standby, then the test specimen for preparing is put into the bent beam flow graph and carried out constant temperature one hour, the temperature of constant temperature is the temperature T intending obtaining product specification and require ℃, after constant temperature is finished, test specimen is carried out creep test, obtain the stiffness modulus A of material
21The rate of change B of modulus during with 60 seconds
21Repeat above-mentioned steps, obtain the stiffness modulus A of material
22The rate of change B of modulus during with 60 seconds
22, by calculating stiffness modulus A
21With stiffness modulus A
22Mean value note make A
2, the rate of change B of modulus when calculating 60 seconds
21The rate of change B of modulus during with 60 seconds
22Mean value note make B
2Other is identical with one of embodiment one to five.
Embodiment seven: what present embodiment was different with one of embodiment one to six is: in the step 5 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, adds matrix pitch quality 10% in the matrix pitch, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 5000 rev/mins the condition, namely 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: in the step 5 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, adds matrix pitch quality 15% in the matrix pitch, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 5000 rev/mins the condition, namely 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: the heat-preserving equipment described in the step 5 is the controllable temperature electric furnace; High-speed mixing equipment described in the step 3 is 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 6 step 5 is obtained is heated to the rubber cement shape and pours in the bent beam flow graph test piece mould, after treating that the modified bitumen II is down to room temperature, carry out the demoulding, test specimen is standby, then the test specimen for preparing is put into the bent beam flow graph and carried out constant temperature one hour, the temperature of constant temperature is the temperature T intending obtaining product specification and require ℃, after constant temperature is finished, test specimen is carried out creep test, obtain the stiffness modulus A of material
31The rate of change B of modulus during with 60 seconds
31Repeat above-mentioned steps, obtain the stiffness modulus A of material
32The rate of change B of modulus during with 60 seconds
32, by calculating stiffness modulus A
31With stiffness modulus A
32Mean value note make A
3, the rate of change B of modulus when calculating 60 seconds
31The rate of change B of modulus during with 60 seconds
32Mean value note make B
3Other 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 pitch cryogenic property:
One, pour in the bent beam flow graph test piece mould after matrix pitch being heated to the rubber cement shape, treat that matrix pitch is down to room temperature after, carry out the demoulding, test specimen is standby;
Two, the test specimen that step 1 is prepared is put into the bent beam flow graph and was carried out constant temperature one hour, and the temperature of constant temperature is-18 ℃, after constant temperature is finished, test specimen is carried out creep test, obtains the stiffness modulus A of material
11The rate of change B of modulus during for 494MPa and 60 seconds
11Be 0.255; Repeat above-mentioned steps, obtain the stiffness modulus A of material
12The rate of change B of modulus during for 503MPa and 60 seconds
12Be 0.261, by calculating stiffness modulus A
11With stiffness modulus A
12Mean value be 498.5MPa, note is made A
1, the rate of change B of modulus when calculating 60 seconds
11The rate of change B of modulus during with 60 seconds
12Mean value be 0.258, note is made B
1
Three, 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, adds matrix pitch quality 4% in the matrix pitch, utilizing the high-speed shearing machine low whipping speed then is to stir 30min under 4500 rev/mins the condition, namely obtains the modified bitumen I;
Four, the modified bitumen I that step 3 is obtained is poured in the bent beam flow graph test piece mould after being heated to the rubber cement shape, after treating that the modified bitumen I is down to room temperature, carry out the demoulding, test specimen is standby, then the test specimen for preparing is put into the bent beam flow graph and carried out constant temperature one hour, the temperature of constant temperature is-18 ℃, after constant temperature is finished, test specimen is carried out creep test, obtain the stiffness modulus A of material
21The rate of change B of modulus during for 357MPa and 60 seconds
21Be 0.296; Repeat above-mentioned steps, obtain the stiffness modulus A of material
22The rate of change B of modulus during for 363MPa and 60 seconds
22Be 0.296, by calculating stiffness modulus A
21With stiffness modulus A
22Mean value be 360MPa, note is made A
2, the rate of change B of modulus when calculating 60 seconds
21The rate of change B of modulus during with 60 seconds
22Mean value be 0.296, note is made B
2
Five, 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, adds matrix pitch quality 15% in the matrix pitch, utilizing the high-speed shearing machine low whipping speed then is to stir 30min under 4500 rev/mins the condition, namely obtains the modified bitumen II;
Six, the modified bitumen II that step 5 is obtained is heated to the rubber cement shape and pours in the bent beam flow graph test piece mould, after treating that the modified bitumen II is down to room temperature, carry out the demoulding, test specimen is standby, then the test specimen for preparing is put into the bent beam flow graph and carried out constant temperature one hour, the temperature of constant temperature is-18 ℃, after constant temperature is finished, test specimen is carried out creep test, obtain the stiffness modulus A of material
31The rate of change B of modulus during for 146MPa and 60 seconds
31Be 0.383; Repeat above-mentioned steps, obtain the stiffness modulus A of material
32The rate of change B of modulus during for 139MPa and 60 seconds
32Be 0.379, by calculating stiffness modulus A
31With stiffness modulus A
32Mean value be 142.5MPa, note is made A
3, the rate of change B of modulus when calculating 60 seconds
31The rate of change B of modulus during with 60 seconds
32Mean value be 0.381, note is made B
3
Seven, the data that obtain according to step 2, step 4 and step 6 are horizontal ordinate with the oil content volume, and corresponding stiffness modulus is ordinate, ordinate is the denary logarithm scale, set up typical curve, and obtain equation of linear regression y=2.69992-0.03628x, obtain parameter k
1Be-0.03628 and b
1Be 2.69992, namely can be under any oil content volume condition, oil content is to the measuring and calculating of pitch modulus;
Eight, the data that obtain according to step 2, step 4 and step 6, be horizontal ordinate with the oil content volume, the rate of change of modulus is ordinate in the time of corresponding 60 seconds, ordinate is the denary logarithm scale, set up typical curve, and obtain equation of linear regression y=-0.58143+0.01099x, obtain parameter k
2Be 0.01099 and b
2Be-0.58143, namely can be under any oil content volume condition, oil content is to the measuring and calculating of pitch modulus change rate in the time of 60 seconds;
Nine, the equation of linear regression y=-0.58143+0.01099x that obtains of the equation of linear regression y=2.69992-0.03628x that obtains of integrating step seven and step 8 namely can be to oil content under any oil content volume condition to the measuring and calculating of pitch cryogenic property.
Fig. 1 is that the pitch that this test procedure seven obtains measures the calculation curve map at-18 ℃ of condition counterdies; Fig. 2 is pitch modulus change rate measuring and calculating curve map under-18 ℃ of conditions that this test procedure eight obtains.
When the asphaltic products of needs designs temperature for-18 ℃ of conditions under modulus when being 260MPa, then can utilize step 7 to obtain equation of linear regression y=2.69992-0.03628x and determine needed oil content volume, be Lg(260)=2.69992-0.03628x, x is about 8, the oil content that namely adds asphalt quality 8% just can obtain that modulus is the asphaltic products of 260MPa under-18 ℃ of conditions, the equation of linear regression y=-0.58143+0.01099x that x=8 substitution step 8 is obtained namely can calculate designed product modulus change rate under-18 ℃ of conditions and be about 0.33 then.
Claims (10)
1. an oil content is characterized in that to the measuring method of pitch cryogenic property oil content carries out according to the following steps to the measuring method of pitch cryogenic property:
One, pour in the bent beam flow graph test piece mould after matrix pitch being heated to the rubber cement shape, treat that matrix pitch is down to room temperature after, carry out the demoulding, test specimen is standby;
Two, the test specimen that step 1 is prepared is put into the bent beam flow graph and was carried out constant temperature one hour, and the temperature of constant temperature is the temperature T intending obtaining product specification and require ℃, after constant temperature is finished, test specimen is carried out creep test, obtains the stiffness modulus A of material
1The rate of change B of modulus during with 60 seconds
1
Three, 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, adds matrix pitch quality 2%～4% in the matrix pitch, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 4000 rev/mins～5000 rev/mins the condition, namely obtains the modified bitumen I;
Four, the modified bitumen I that step 3 is obtained is poured in the bent beam flow graph test piece mould after being heated to the rubber cement shape, after treating that the modified bitumen I is down to room temperature, carry out the demoulding, test specimen is standby, then the test specimen for preparing is put into the bent beam flow graph and carried out constant temperature one hour, the temperature of constant temperature is the temperature T intending obtaining product specification and require ℃, after constant temperature is finished, test specimen is carried out creep test, obtain the stiffness modulus A of material
2The rate of change B of modulus during with 60 seconds
2
Five, 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, adds matrix pitch quality 7%～15% in the matrix pitch, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 4000 rev/mins～5000 rev/mins the condition, namely obtains the modified bitumen II;
Six, the modified bitumen II that step 5 is obtained is heated to the rubber cement shape and pours in the bent beam flow graph test piece mould, after treating that the modified bitumen II is down to room temperature, carry out the demoulding, test specimen is standby, then the test specimen for preparing is put into the bent beam flow graph and carried out constant temperature one hour, the temperature of constant temperature is the temperature T intending obtaining product specification and require ℃, after constant temperature is finished, test specimen is carried out creep test, obtain the stiffness modulus A of material
3The rate of change B of modulus during with 60 seconds
3
Seven, the data that obtain according to step 2, step 4 and step 6 are horizontal ordinate with the oil content volume, and corresponding stiffness modulus is ordinate, and ordinate is the denary logarithm scale, sets up typical curve, and obtain equation of linear regression y=k
1X+b
1, obtain parameter k
1And b
1After, namely can be under any oil content volume condition, oil content is to the measuring and calculating of pitch modulus;
Eight, the data that obtain according to step 2, step 4 and step 6 are horizontal ordinate with the oil content volume, and the rate of change of modulus is ordinate in the time of corresponding 60 seconds, and ordinate is the denary logarithm scale, sets up typical curve, and obtain equation of linear regression y=k
2X+b
2, obtain parameter k
2And b
2After, namely can be under any oil content volume condition, oil content is to the measuring and calculating of pitch modulus change rate in the time of 60 seconds;
Nine, the equation of linear regression y=k that obtains of integrating step seven
1X+b
1The equation of linear regression y=k that obtains with step 8
2X+b
2, namely can be to oil content under any oil content volume condition to the measuring and calculating of pitch cryogenic property.
2. a kind of oil content according to claim 1 is to the measuring method of pitch cryogenic property, it is characterized in that the test specimen that in the step 2 step 1 is prepared puts into the bent beam flow graph and carried out constant temperature one hour, the temperature of constant temperature is the temperature T intending obtaining product specification and require ℃, after constant temperature is finished, test specimen is carried out creep test, obtain the stiffness modulus A of material
11The rate of change B of modulus during with 60 seconds
11Repeat above-mentioned steps, obtain the stiffness modulus A of material
12The rate of change B of modulus during with 60 seconds
12, by calculating stiffness modulus A
11With stiffness modulus A
12Mean value note make A
1, the rate of change B of modulus when calculating 60 seconds
11The rate of change B of modulus during with 60 seconds
12Mean value note make B
1
3. a kind of oil content according to claim 1 and 2 is to the measuring method of pitch cryogenic property, it is characterized in that in the step 3 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, adds matrix pitch quality 3% in the matrix pitch, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 4000 rev/mins the condition, namely obtains the modified bitumen I.
4. a kind of oil content according to claim 3 is to the measuring method of pitch cryogenic property, it is characterized in that in the step 3 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, adds matrix pitch quality 4% in the matrix pitch, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 4500 rev/mins the condition, namely obtains the modified bitumen I.
5. a kind of oil content according to claim 4 is characterized in that to the measuring method of pitch cryogenic property the heat-preserving equipment described in the step 3 is the controllable temperature electric furnace; High-speed mixing equipment described in the step 3 is high-speed shearing machine.
6. according to claim 4 or the 5 described a kind of oil contents measuring method to the pitch cryogenic property, it is characterized in that pouring in the bent beam flow graph test piece mould after the modified bitumen I that in the step 4 step 3 is obtained is heated to the rubber cement shape, after treating that the modified bitumen I is down to room temperature, carry out the demoulding, test specimen is standby, then the test specimen for preparing is put into the bent beam flow graph and carried out constant temperature one hour, the temperature of constant temperature is the temperature T intending obtaining product specification and require ℃, after constant temperature is finished, test specimen is carried out creep test, obtain the stiffness modulus A of material
21The rate of change B of modulus during with 60 seconds
21Repeat above-mentioned steps, obtain the stiffness modulus A of material
22The rate of change B of modulus during with 60 seconds
22, by calculating stiffness modulus A
21With stiffness modulus A
22Mean value note make A
2, the rate of change B of modulus when calculating 60 seconds
21The rate of change B of modulus during with 60 seconds
22Mean value note make B
2
7. a kind of oil content according to claim 6 is to the measuring method of pitch cryogenic property, it is characterized in that in the step 5 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, adds matrix pitch quality 10% in the matrix pitch, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 5000 rev/mins the condition, namely obtains the modified bitumen II.
8. a kind of oil content according to claim 7 is to the measuring method of pitch cryogenic property, it is characterized in that in the step 5 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, adds matrix pitch quality 15% in the matrix pitch, utilizing the high-speed mixing equipment low whipping speed then is to stir 30min under 5000 rev/mins the condition, namely obtains the modified bitumen II.
According to claim 7 or 8 described a kind of oil contents to the measuring method of pitch cryogenic property, it is characterized in that the heat-preserving equipment described in the step 5 is the controllable temperature electric furnace; High-speed mixing equipment described in the step 3 is high-speed shearing machine.
10. a kind of oil content according to claim 9 is to the measuring method of pitch cryogenic property, it is characterized in that the modified bitumen II that in the step 6 step 5 is obtained is heated to the rubber cement shape and pours in the bent beam flow graph test piece mould, after treating that the modified bitumen II is down to room temperature, carry out the demoulding, test specimen is standby, then the test specimen for preparing is put into the bent beam flow graph and carried out constant temperature one hour, the temperature of constant temperature is the temperature T intending obtaining product specification and require ℃, after constant temperature is finished, test specimen is carried out creep test, obtain the stiffness modulus A of material
31The rate of change B of modulus during with 60 seconds
31Repeat above-mentioned steps, obtain the stiffness modulus A of material
32The rate of change B of modulus during with 60 seconds
32, by calculating stiffness modulus A
31With stiffness modulus A
32Mean value note make A
3, the rate of change B of modulus when calculating 60 seconds
31The rate of change B of modulus during with 60 seconds
32Mean value note make B
3
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