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A Research Method of Modification Mechanism of Modified Asphalt

A technology of modified asphalt and asphalt, which is applied in the field of research on the modification mechanism of modified asphalt, can solve problems such as complex and diverse interaction relationships, difficult research on modified asphalt, and achieve low-cost effects

Active Publication Date: 2022-04-26
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still deficiencies in the research on the modification mechanism of modified asphalt.
First of all, asphalt itself is a mixture of extremely complex components, and it is difficult to study the microscopic modification mechanism; in addition, the relationship between external admixtures and asphalt is complex and varied, and the relationship between modifiers and asphalt There are not only physical effects, chemical effects, etc., but in most cases, multiple effects coexist; finally, due to the limitation of experimental equipment, it is difficult to study the modified asphalt at the molecular level

Method used

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  • A Research Method of Modification Mechanism of Modified Asphalt
  • A Research Method of Modification Mechanism of Modified Asphalt
  • A Research Method of Modification Mechanism of Modified Asphalt

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Embodiment 1

[0042] as attached figure 1 As shown, an analysis method for the modification mechanism of modified asphalt, the present embodiment takes asphalt saturation and nano-zinc oxide modifier as the research object, specifically including the following steps:

[0043] (1) Construct the initial model of asphalt saturation and nano zinc oxide modifier;

[0044] According to the relevant experimental and theoretical literature on the molecular structure of asphalt, the molecular structure of the asphalt saturation fraction was obtained, and the typical structure of the asphalt saturation fraction and the molecular structure of the nano-zinc oxide modifier were constructed by using the Visualizer module in the Materials Studio software. Use the Amorphous Cell module to construct the asphalt-modifier primary cell molecular structure data file for simulation; set the unit cell constant a=b=c=15, and select the filling density Density=0.9 for filling , get the asphalt saturation fraction-...

Embodiment 2

[0059] as attached figure 1 , attached Figure 7 to attach Figure 9 As shown, an analysis method of modified asphalt modification mechanism, the present embodiment takes asphalt saturation content and nano-zinc oxide modifier as research objects, specifically includes the following steps: (1) constructing asphalt aromatics, SBS modifier initial model;

[0060] According to the relevant experimental and theoretical literature on the molecular structure of asphalt, the molecular structure of asphalt aromatics was obtained, and the typical structure of asphalt aromatics and the molecular structure of SBS modifier were constructed using the Visualizer module in the Materials Studio software, and the constructed asphalt aromatic molecules were combined with SBS The modifier molecule uses the Amorphous Cell module to construct the molecular structure data file of the asphalt-modifier cell to be simulated; set the unit cell constant a=b=c=15, select the filling density Density=1.0...

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Abstract

The invention discloses a research method for the modification mechanism of modified asphalt, comprising the following steps: (1) constructing the initial model of the asphalt-modifier system to be calculated by Materials Studio software, and obtaining the asphalt-modifier protocellular molecule Structural data file; (2) Carry out structure optimization to asphalt-modifier system with Calculation in Materials Studio software DMol3 module, obtain the processed asphalt-modifier protocellular molecular structure data file; (3) Asphalt and modified Calculate the energy and charge distribution of the agent to obtain the energy and charge distribution parameters; (4) calculate the binding energy between the asphalt and the modifier and its charge transfer size; (5) use the Animation tool in the Materials Studio software to The type of interaction between asphalt and modifier is analyzed and judged. The invention adopts the density functional theory simulation calculation method to study the modification mechanism of the asphalt by the modifier, and solves the problem that the modified asphalt cannot be modified at the molecular level due to the limitation of the test conditions to a certain extent.

Description

technical field [0001] The invention relates to the field of material mechanism research, in particular to a research method for the modification mechanism of modified asphalt. Background technique [0002] Asphalt materials are widely used in transportation, industry, construction, etc. However, the large-scale, heavy-loaded and overloaded vehicles in road transportation are becoming more and more serious. Ordinary asphalt can no longer meet the needs of construction. The service life of asphalt roads is short, and problems such as rutting and looseness have seriously affected the stability and safety of driving. With the rapid development of my country's road transportation industry, the price of oil and asphalt continues to rise, and the investment in asphalt pavement projects has greatly increased. The requirements for high-temperature stability, low-temperature crack resistance, aging resistance and durability of roads are also getting higher and higher. [0003] Modif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G16C60/00
CPCG16C10/00G16C20/80
Inventor 刘其城曾清刘鹏
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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