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Research method for modification mechanism of modified asphalt

A technology for modifying asphalt and bitumen, which is applied in the research field of modification mechanism of modified asphalt, can solve the problems of complex and diverse interaction relationship, difficult to modify asphalt research, etc., and achieve the effect of low cost

Active Publication Date: 2018-08-17
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • 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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  • Research method for modification mechanism of modified asphalt
  • Research method for modification mechanism of modified asphalt
  • Research method for 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 a modification mechanism of modified asphalt. The method comprises the following steps of (1) building an initial model of a to-be-calculated asphalt-modifier system through Materials Studio software, thereby obtaining an asphalt-modifier primitive cell molecular structure data file; (2) performing structure optimization on the asphalt-modifier systemby using Calculation in a DMol3 module of the Materials Studio software, thereby obtaining a processed asphalt-modifier primitive cell molecular structure data file; (3) performing calculation on energy and charge distribution of asphalt and a modifier to obtain an energy and charge distribution parameter; (4) performing calculation to obtain binding energy between the asphalt and the modifier, and charge transfer capacity of the asphalt and the modifier; and (5) performing analysis and judgment on an action type between the asphalt and the modifier through an Animation tool in the Materials Studio software. The modification mechanism of the modifier to the asphalt is researched by adopting a density functional theory analog calculation method, so that the problem that the modified asphaltcannot be subjected to modification research at a molecular level due to limitation of test conditions is solved 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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IPC IPC(8): G06F19/00
CPCG16C10/00G16C20/80
Inventor 刘其城曾清刘鹏
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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