Research On Materials Composition And Characteristics Of The Stress Absorbed Mixture

The reflective cracking problem exists both in the asphalt overlay on old concrete and in the asphalt pavement on rigid or semi-rigid base. How to delay or restrain the development of the reflective cracking is an urgent problem. The Stress Absorbed Mixture is designed to delay or restrain the development of the reflective cracking in the asphalt overlay on old concrete and in the newly built asphalt pavement on rigid or semi-rigid base.The change of the Special modified asphalt in Production has been studied in this paper, and the production steps, control parameters and attention have also been described in detail. The advantage and disadvantage of the asphalt modified equipment commonly used in laboratory have been analyzed, considering economic and practical, it raised the production process, also the quality control standards and technical requirements. It uses the grading design method of changing i to calculate the initial grading range, and studies the key sieve in grading by the test. Combined the practice in the past, it determins the control grading range of the Stress Absorbed Mixture. Then it summarizes the relevant data of the practice in the past, and using the linear regression method, gives the estimated formula of asphalt content. For the special composed of the Stress Absorbed mixture, a new formula for calculating the asphalt film thickness has been derived. For the features of the Stress Absorbed Mixture, it proposes the High-temperature penetration test and SCB(Semi-Circular Bending) test to confirm the deformation at high temperature and the fatigue at low temperature. For the project grading on the test roading and the grading range proposed in this paper, it has a study on the performance of the cracking and fatigue at low temperature, anti-deformation at high temperature, the stability in water, and verify the grading range proposed in this paper is appropriate. At last, relying on the testing road project, it raises the construction technology and quality control notes.