Low-temperature ductility and high-temperature-resistant storage stability auxiliaries for modified asphalt as well as preparation method for low-temperature ductility and high-temperature-resistant storage stability auxiliaries and modified asphalt

A technology of storage stability and modified asphalt, which is applied in building insulation materials, building components, buildings, etc., can solve the problem of poor interfacial compatibility of matrix asphalt, affecting low temperature performance indicators and high temperature storage stability, and affecting low temperature performance of modified asphalt Index and high temperature storage stability and other issues, to achieve the effect of reducing environmental pollution

Active Publication Date: 2015-06-10
TIANJIN HI TECH ENVIRONMENT DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) The interfacial compatibility between the modifier and the base asphalt is poor, and the polymer modifier cannot form a stable network structure in the asphalt, which affects the low-temperature performance index and high-temperature storage stability;
[0004] (2) The long-term heat storage of modified asphalt is accompanied by asphalt aging and polymer modifier degradation, which further affects the low-temperature performance index and high-temperature storage stability of modified asphalt
This method adds some expensive SBS, which increases the cost of modified asphalt

Method used

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  • Low-temperature ductility and high-temperature-resistant storage stability auxiliaries for modified asphalt as well as preparation method for low-temperature ductility and high-temperature-resistant storage stability auxiliaries and modified asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Weigh 20% 40-mesh rubber powder according to the weight ratio of the base asphalt, add it to the base asphalt and stir rapidly for 15 minutes, then stir and add 0.4% stabilizer, use a colloid mill to grind once (10 minutes), and incubate at 170-175 ° C After 4 hours, the modified asphalt was prepared and the properties of the modified asphalt were tested.

Embodiment 2

[0040] Weigh 25% 40-mesh rubber powder according to the weight ratio of the base asphalt, add it to the base asphalt and stir rapidly for 15 minutes, then add 0.4% stabilizer after stirring, use a colloid mill to grind once (10 minutes), and incubate at 170-175 °C After 4 hours, the modified asphalt was prepared and the properties of the modified asphalt were tested.

Embodiment 3

[0042] Pretreat rubber powder, softening oil, and activator in a high-speed mixer at 50-100°C for 10-30 minutes, meter them into the screw extruder, and continuously extrude fluid regenerated rubber from the die after reaction. Heat the rubber cracking oil to 140-170°C, weigh the diluent with a weight ratio of 75%, add the regenerated rubber to the rubber cracking oil, keep stirring for 30 minutes, keep the temperature at 150°C, and then use a high-speed emulsifying shear to shear The speed is 1000-10000 rpm and shearing for 20 minutes to prepare additives that can significantly improve the low-temperature ductility and high-temperature storage stability of modified asphalt. Take by weighing 20% ​​of 40 mesh rubber powder and 5% of the above-mentioned additives according to the weight ratio of the base asphalt, add them into the base asphalt and stir rapidly for 15 minutes, then stir and add 0.4% stabilizer, and use a colloid mill to grind 1 time (10min), And incubate at 170-1...

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Abstract

The invention discloses low-temperature ductility and high-temperature-resistant storage stability auxiliaries for modified asphalt as well as a preparation method for the low-temperature ductility and high-temperature-resistant storage stability auxiliaries and modified asphalt. The preparation method comprises the following steps: performing complete desulfurization on regenerated waste rubber to prepare fluid regenerated rubber with main components of linear macromolecular polymer and aryl small molecules under the high-temperature strong-shearing effects of a twin-screw extruder; then, dissolving the fluid regenerated rubber with a diluent in certain proportion to prepare auxiliaries capable of remarkably improving low-temperature ductility and high-temperature-resistant storage stability of the modified asphalt. The low-temperature performances of the modified asphalt prepared by the auxiliaries can reach index requirements of JTG F40-2004 polymer modified asphalt I-B, the high temperature storage stability is obviously improved and no segregation is almost realized. The auxiliaries prepared by the preparation method can be stored for a long time, transported at a long distance, solve the application problem of sticky regenerated rubber, and can be widely applied to various-grade highway engineering.

Description

technical field [0001] The invention relates to an additive capable of significantly improving the low-temperature ductility and high-temperature resistance stability of modified asphalt, and belongs to the field of waste rubber recycling and utilization. Background technique [0002] With the development of modern transportation, the requirements for road pavement are getting higher and higher, and higher requirements are put forward for the high-temperature stability, low-temperature crack resistance, and low-temperature deformation capacity of road asphalt. However, the quality of traditional matrix asphalt and Quality has been difficult to meet these requirements. Polymer modified asphalt has been recognized as an excellent pavement material in the industry because of its excellent high and low temperature performance. Especially the proportion of SBS modified asphalt has been as high as 95%. In recent years, waste rubber powder modified asphalt has gradually become kn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L21/00C08L91/00C08L93/04C08K5/372C08K5/50C08K5/37C08K5/17
CPCY02P20/54
Inventor 江宽董大伟陈俊峰马庆杰刘双旺
Owner TIANJIN HI TECH ENVIRONMENT DEV CO LTD
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