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Preparation method for improving asphalt viscosity

A viscosity and asphalt technology, which is applied in the field of improving the viscosity of No. 90 road petroleum asphalt preparation, can solve the problems of high price of SBS modifier and increase of petroleum asphalt cost, and achieve the effect of increasing cost and good compatibility

Active Publication Date: 2012-12-26
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The price of SBS modifier is high, which will easily cause a substantial increase in the cost of No. 90 road petroleum asphalt

Method used

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  • Preparation method for improving asphalt viscosity
  • Preparation method for improving asphalt viscosity
  • Preparation method for improving asphalt viscosity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Step 1: Test the 60°C dynamic viscosity and other technical indicators of No. 90 asphalt petroleum asphalt. The results are shown in Table 1.

[0019] Table 1. Performance indicators of petroleum asphalt for Road No. 90

[0020]

[0021] It can be seen from Table 1 that the 60°C dynamic viscosity of No. 90 road asphalt is 130.9 Pa.s, and the improvement target value is 160 Pa.s. F40-2004).

[0022] Step 2: Test the 60°C dynamic viscosity and other technical indicators of No. 70 road petroleum asphalt. The results are shown in Table 2.

[0023] Table 2. Performance indicators of road petroleum asphalt No. 70

[0024]

[0025]

[0026] It can be seen from Table 2 that the 60°C dynamic viscosity of No. 70 road petroleum asphalt is 208.5 Pa.s, which is greater than the improvement target value. Other performance indicators all meet the technical requirements of No. 70 road petroleum asphalt in "Technical Specifications for Construction of Highway Asphalt Pavemen...

Embodiment 2

[0033] In step three of Example 1, according to the 60°C dynamic viscosity value (130.9Pa.s) of No. 90 asphalt petroleum asphalt, the 60°C dynamic viscosity improvement target value (160Pa.s) of No. 90 road petroleum asphalt and the 60°C dynamic viscosity of No. 70 asphalt petroleum asphalt Dynamic viscosity value at 60°C (208.5Pa.s), according to the formula lgη 2 =(1-R ob ) lgη 1 +R ob lgη 0 Calculate and determine that the optimum dosage of No. 70 road petroleum asphalt modifier is 20%. In the formula η 2 Represents the target dynamic viscosity at 60°C (Pa.s); η 1 Represents the 60°C dynamic viscosity (Pa.s) of No. 90 road petroleum asphalt; η o Represents the 60°C dynamic viscosity (Pa.s) of No. 70 road petroleum asphalt; R ob Represents the optimal amount (%), that is, the mass ratio of No. 70 road asphalt and No. 90 road asphalt.

[0034] Others are the same as in Example 1.

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Abstract

The invention relates to a preparation method for improving asphalt viscosity, and belongs to the field of pavement petroleum asphalt engineering. When the dynamic viscosity of the No.90 pavement petroleum asphalt is less than 160 Pa.s at the temperature of 60 DEG C, the No.70 pavement petroleum asphalt, of which the dynamic viscosity is greater than a target viscosity value at the temperature of 60 DEG C, can be used as a modifier according to the target viscosity value so as to improve the dynamic viscosity of the No.90 pavement petroleum asphalt at the temperature of 60 DEG C. The No.90 pavement petroleum asphalt and the No.70 pavement petroleum asphalt belong to the same material, have good compatibility and are free of the segregation phenomenon, and the price of the No.70 pavement petroleum asphalt is greatly lower than that of the traditional SBS modifier, so that the preparation method provided by the invention is an economic and practical technique method.

Description

technical field [0001] The invention relates to a preparation method of No. 90 road petroleum asphalt, in particular to a preparation method for improving the viscosity of No. 90 road petroleum asphalt. Background technique [0002] The 60°C dynamic viscosity of road petroleum asphalt represents the property that the resistance of asphalt to deformation at high temperature increases with the increase of deformation rate. The larger the 60°C dynamic viscosity value of road petroleum asphalt, the stronger its high temperature resistance to deformation. According to JTGF40-2004 "Technical Specifications for Construction of Highway Asphalt Pavement", the dynamic viscosity of petroleum asphalt on No. 90 road at 60°C is greater than 160Pa.s. [0003] The 60℃ dynamic viscosity of road petroleum asphalt has been neglected because it is a non-mandatory technical index. In fact, when all mandatory indicators of road 90 petroleum asphalt, such as penetration at 25°C, softening point,...

Claims

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Application Information

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IPC IPC(8): C08L95/00
Inventor 季节索智许鹰徐世法高超
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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