Method for measuring and calculating influence on high-temperature performance of asphalt caused by oil content

A high-temperature performance and asphalt technology, which is applied in the field of measurement and calculation of road asphalt high-temperature performance, can solve problems such as low efficiency and achieve the effect of improving production efficiency

Inactive Publication Date: 2013-07-24
HARBIN INST OF TECH
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  • Abstract
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Problems solved by technology

[0003] The present invention aims to solve the problem of low efficiency in the test process of the influence of oil on the high temperature performance of

Method used

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  • Method for measuring and calculating influence on high-temperature performance of asphalt caused by oil content

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specific Embodiment approach 1

[0016] Specific embodiment one: In this embodiment, a method for measuring and calculating the high temperature performance of asphalt by oil content is carried out according to the following steps:

[0017] 1. Heat the base asphalt until it is in the form of glue and put it on a circular parallel plate with a diameter of 25mm. The distance between the plates is 1.00mm. Using a dynamic shear rheometer (DSR), according to the temperature T°C required by the product to be obtained The dynamic sinusoidal strain test is carried out under the following conditions. When the dynamic sinusoidal strain test is performed, the strain amplitude is 12%, the frequency is 1.59Hz, and the complex modulus G is obtained. A * and phase angle δ A , the index |G that characterizes the high temperature performance of asphalt is obtained by calculation A *| / sinδ A , record it as A;

[0018] 2. Heat the base asphalt to 150°C, use heat preservation equipment to keep the heated base asphalt at a con...

specific Embodiment approach 2

[0027] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, the base asphalt is heated to a slurry state and placed on a circular parallel plate with a diameter of 25 mm, and the distance between the plates is 1.00 mm. Tangential rheometer (DSR), according to the temperature T °C required by the product to be tested, the dynamic sinusoidal strain test is carried out. The strain amplitude during the dynamic sinusoidal strain test is 12%, and the frequency is 1.59Hz, and the complex modulus G is obtained. A1 and a phase angle of δ A1 , the index |G that characterizes the high temperature performance of asphalt is obtained by calculation A1 | / sinδ A1 ; Repeat the above steps to get the complex modulus G A2 and phase angle δ A2 The index |G that characterizes the high temperature performance of asphalt is obtained by calculation A2 | / sinδ A2 , get|G A1 | / sinδ A1 and |G A2 | / sinδ A2 The average value of , which is recor...

specific Embodiment approach 3

[0028]Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the base asphalt is heated to 150°C as described in step 2, and the temperature of the heated base asphalt is kept constant to 150±5°C by using heat preservation equipment. Add 2% oil of the base asphalt to the base asphalt under temperature conditions, and then use high-speed stirring equipment to stir for 30 minutes at a stirring speed of 4500 rpm to obtain modified asphalt I. Others are the same as in the first or second embodiment.

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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 [0001] The invention relates to a method for measuring and calculating the high-temperature performance of road asphalt. Background technique [0002] In recent years, with the large-scale construction of asphalt pavement in my country, the demand for asphalt and the quality of asphalt have been put forward higher and higher requirements. Adding oil to asphalt to adjust the properties of asphalt to obtain products that meet the standards is the method of producing asphalt one. However, the traditional method is to add a certain amount of oil to the asphalt and then test its properties. This method will consume a large amount of raw materials and time, which is not conducive to improving production efficiency. Contents of the invention [0003] The invention aims to solve the problem of low efficiency in the test process of the influence of oil content on the high-temperature performance of asphalt in the existing asphalt production process, and provides a ...

Claims

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Application Information

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IPC IPC(8): G01N11/00
Inventor 张磊谭忆秋邢超纪伦侯赛因·尤·巴赫尔
Owner HARBIN INST OF TECH
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