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Asphalt Mixture Gradation engineering design is an important part of a direct impact on project quality. Testing personnel in the selection when the aggregate gradation , mainly depends on the experience, he is an experience-based testing process , people usually have no experience \Meanwhile, the asphalt mix design is a time-consuming , laborious , large consumption of materials work . In view of this situation, this paper based on aggregate particles randomly oriented characteristics, using VB language , combined with software engineering theory , the use of computers to aggregate gradation for visual simulation , research and development of Asphalt Mixture Gradation visual design system ( AGVD). The system implements a direct visualization of aggregate gradation design, intuitively reflect different types of aggregates graded combinations , given the appropriate visual interface , you can give designers an intuitive help. Meanwhile, the system calculated plane porosity has been demonstrated that the aggregate value of the gap between the rate of VMA has some correlation. Void through the interface and graphic designers can learn about the structure of the selected type of grading possible , before the test can be designed to determine the initial grading of mineral aggregate structural features , which can be composed of aggregate gradation on the preliminary design for screening. Therefore, the system can solve the asphalt mixture design process too dependent on experience problems, improve design quality and efficiency , can significantly reduce the amount of testing .
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