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Application of a nucleating agent, modified asphalt and preparation method thereof
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A modified asphalt and nucleating agent technology, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of easy aging, degradation, poor compatibility between polymers and asphalt, and achieve high temperature and aging resistance. Enhanced shear deformation resistance and improved anti-aging performance
Active Publication Date: 2021-11-30
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY +1
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Problems solved by technology
However, there are still many deficiencies in modified asphalt after adding polymers: easy aging, degradation, poor compatibility between polymers and asphalt, and easy delamination and segregation.
Although nanomaterials have excellent properties, they are easy to agglomerate, and nano-modified asphalt is difficult to ensure the high and low temperature performance of asphalt at the same time.
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Embodiment 1
[0059] Heat the base asphalt to a molten state at 160°C, take the nucleating agent and add it to the molten base asphalt under stirring, mix evenly, put it into an electric heating insulation jacket, keep the temperature at 160°C, and insert a high-speed shear Instrument, under the condition of 4000r / min high-speed shearing for 60min, then develop at 160℃ for 1h to get the modified asphalt.
[0060] Among them, the base asphalt is produced by Xiamen Huate Company, No. 70 (70#);
[0061] Among them, the nucleating agent is NAP, and NAP is 2,2'-methylene-bis(4,6-di-tert-butylphenyl phosphate) basic aluminum, which is produced by Chenghe Technology Co., Ltd.
[0062] Among them, NAP 0% is 70# base asphalt without nucleating agent.
[0063] NAP 0.5% is base asphalt with 0.5% by weight of NAP added to the base asphalt
[0064] NAP 1% is NAP added with 1% weight of base asphalt to base asphalt.
[0065] NAP 2% is NAP added with 2% weight of base asphalt to base asphalt.
[0066]...
Embodiment 2
[0068] Heat the base asphalt to a molten state at 160°C, take the nucleating agent and add it to the molten base asphalt under stirring, mix evenly, put it into an electric heating insulation jacket, keep the temperature at 160°C, and insert a high-speed shear Instrument, under the condition of 4000r / min high-speed shearing for 60min, then develop at 160℃ for 1h to get the modified asphalt.
[0069] Among them, the base asphalt is produced by Xiamen Huate Company, No. 70 (70#);
[0070] Among them, the nucleating agent is NAB, and NAB is calcium tetrahydrobenzenecarboxylate, which is produced by Chenghe Technology Co., Ltd.
[0071] Among them, NAB 0% is 70# base asphalt without nucleating agent.
[0072] NAB 0.5% is NAB added with 0.5% weight of base asphalt to base asphalt.
[0073] NAB 1% is NAB added with 1% weight of base asphalt to base asphalt.
[0074] NAB 2% is NAB added with 2% weight of base asphalt to base asphalt.
[0075] NAB 3% is NAB added with 3% weight of...
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Abstract
The invention discloses the application of a nucleating agent, which is added to base asphalt, and the nucleating agent is one or more of alpha nucleating agents or beta nucleating agents. The nucleating agent of the present invention can effectively improve the high temperature and anti-aging properties of the base asphalt, and can increase the softening point by up to 12.53%. Dynamic shear rheological experiments show that the addition of the nucleating agent has a significant effect on the shear deformation resistance of the base asphalt The large enhancement shows that the nucleating agent modified asphalt has better high temperature stability; compared with the base asphalt through the ultraviolet aging test and long-term aging test, the aging index of the modified asphalt is much lower than that of the base asphalt, and the added nucleating agent , can improve the anti-aging performance of base asphalt.
Description
technical field [0001] The invention belongs to the technical field of asphalt materials, in particular to the field of modified asphalt, in particular to the application of a nucleating agent and the modified asphalt. Background technique [0002] Modified asphalt technology can be traced back to the early 19th century, when the British Whiting proposed rubber-modified asphalt technology. In the 1950s, Japan and the United States successively carried out the work of polymer modified asphalt. Although it started slightly later than Europe, it has developed the fastest in the field of modified asphalt technology and is currently at the leading level in the world. my country began to explore road modified asphalt in the 1980s, but the variety of modifiers used was limited, and a complete modification technology and large-scale production could not be formed. Therefore, imported asphalt has been used in the construction of high-grade highways for a long time in the past, and ...
Claims
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Application Information
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