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Rock asphalt modified asphalt and preparation method thereof

A technology for modifying asphalt and rock asphalt, applied in building components, building insulation materials, buildings, etc., can solve the problems of unstable thermodynamic performance, low stress transfer efficiency, complex production process, etc., and achieve good price advantages and low production costs. , the effect of simple production process

Inactive Publication Date: 2013-03-06
SHANGHAI SENRUI ROAD ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide the use of rock asphalt as a modifier in order to overcome the shortcomings of the existing polymer modified asphalt, such as unstable thermodynamic properties, low stress transfer efficiency, complicated production process, special equipment such as colloid mill, and serious energy consumption. The modified asphalt and its preparation method, the modified asphalt of the present invention has the advantages of anti-stripping, durability, high temperature anti-rutting, anti-aging, etc., and its production process is simple, no special equipment such as colloid mill is needed, and energy consumption is low

Method used

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  • Rock asphalt modified asphalt and preparation method thereof
  • Rock asphalt modified asphalt and preparation method thereof
  • Rock asphalt modified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0016] Add 10 parts by weight of imported rock asphalt to 100 parts by weight of AH-70# asphalt, stir at 150°C for a period of time and then take a sample to test the penetration (25°C), softening point, ductility (15°C) and viscosity (60°C). The mixing time and performance test results of embodiments 1~3 are as shown in table 1:

[0017] Table 1 Performance indicators of rock asphalt modified asphalt in Examples 1 to 3 with different mixing times

[0018] Stirring time (min)

[0019] Softening point (ring and ball method) ℃

[0020] It can be seen from Table 1 that as the stirring time prolongs, the penetration decreases slowly at first, and after the time is extended to 60 minutes, the slope of the line increases and the penetration decreases rapidly. Penetration characterizes the consistency of asphalt material. The trend of the penetration value in the table with the mixing time shows that the initial mixing time has little effect on the consistency of...

Embodiment 4～7

[0022] Add rock asphalt to 100 parts by weight of AH-70# asphalt, stir at 165°C for 30 minutes and then take samples to test the penetration, softening point, ductility (15°C) and viscosity (60°C). The parts by weight and performance test results of rock asphalt in Examples 4 to 7 are as shown in Table 2:

[0023] Table 2. Performance indicators of rock asphalt modified asphalt with different weight parts of rock asphalt added in Examples 4 to 7

[0024] Parts by weight of rock bitumen added

[0025] It can be seen from Table 2 that when the amount of rock asphalt added increases from 0 to 5 parts by weight, each performance index has a significant change, and the change rate is relatively large compared with the subsequent increase in the amount. That is to say, the addition of rock asphalt changes the properties of asphalt from ordinary asphalt to modified asphalt, which shows that rock asphalt can indeed be used as a modifier to effectively improve the properties ...

Embodiment 8～10

[0027] Add imported rock asphalt to 100 parts by weight of AH-70# asphalt, stir at 165°C for 30 minutes and take samples to test penetration, softening point, ductility, viscosity, dynamic shear DSR, BBR creep stiffness, creep Variable rate and SHRP. The parts by weight and performance test results of embodiment 8~10 rock asphalt are as shown in table 3:

[0028] Table 3. Performance indicators of rock asphalt modified asphalt with different weight parts of rock asphalt added in Examples 8-10

[0029]

[0030] It can be seen from Table 3 that the penetration of modified asphalt with rock asphalt is reduced, the softening point is increased, and the viscosity is increased, which shows that the high temperature performance of asphalt is significantly improved. Although the ductility has decreased, the BBR test of SHRP shows that the low-temperature creep stiffness and creep stiffness change rate of asphalt are at the same level, which shows that the addition of rock bitumen ...

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Abstract

The invention discloses rock asphalt modified asphalt and a preparation method thereof. The rock asphalt modified asphalt comprises 100 parts of matrix asphalt and 5-10 parts of rock asphalt. The preparation method includes: adding rock asphalt into matrix asphalt, and stirring at 150-170 DEG C for 30-60 minutes to obtain rock asphalt modified asphalt, wherein the rock asphalt is imported. Compared with the prior art, the rock asphalt modified asphalt has the advantages of stripping resistance, durability, rutting resistance at high temperature, aging resistance and the like. In addition, the rock asphalt modified asphalt is simple in production process and low in energy consumption and production cost, and needs no special equipment such as colloid mill.

Description

technical field [0001] The invention relates to modified asphalt and a preparation method thereof, in particular to a modified asphalt using rock asphalt as a modifier and a preparation method thereof. Background technique [0002] In the past ten years, with the development of economic construction, my country's highway transportation industry has a good opportunity for historical development, and highway construction has made remarkable achievements. The quality of road construction in our country has also been significantly improved. A complete set of technologies has been formed in the construction of asphalt pavement, especially that of expressways. The design level and construction technology level have been significantly improved. The overall quality and performance of most road surfaces are good. . [0003] However, the actual quality of my country's highways still has problems that cannot be ignored. As far as asphalt pavement is concerned, roads generally have pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08J3/20
Inventor 任琤
Owner SHANGHAI SENRUI ROAD ENG TECH
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