Analysis on the Traffic-Response of Asphalt Concrete Overlay on PCC-Slab

2012 ◽  
Vol 178-181 ◽  
pp. 1623-1627
Author(s):  
Wei Xu ◽  
Xuan Cang Wang ◽  
Shan Qiang Li
Keyword(s):  
Finite Element ◽  
Asphalt Concrete ◽  
Element Model ◽  
Concrete Pavement ◽  
Comprehensive Model ◽  
Reflective Cracking ◽  
Traffic Loading ◽  
Asphalt Overlay ◽  
Pavement Construction ◽  
Asphalt Concrete Pavement

Focusing on the severity of asphalt concrete pavement crack, the optimization analyzing finite element model(FEM) of typical asphalt overlay pavement was developed to address reflective cracking, in which the analysis of traffic-loading response were concentrated on the stress-intensive areas close to the joints or cracks. The FE sensitive analysis, evaluating the influence of pavement construction parameters, including modulus and thickness of pavement courses, is useful to establish comprehensive model of overlay pavement construction.

Analysis of Dynamic Deviator Stress of Reinfored Subgrade under Traffic Loading

2012 ◽  
Vol 178-181 ◽  
pp. 1392-1395
Author(s):  
Shi Chuan Wang
Keyword(s):  
Shear Stress ◽  
Stress Distribution ◽  
Compressive Stress ◽  
Asphalt Concrete ◽  
Residual Deformation ◽  
Concrete Pavement ◽  
Key Factors ◽  
Traffic Loading ◽  
Deviator Stress ◽  
Asphalt Concrete Pavement

In order to study the influence of reinforcement on the distribution of dynamic deviator stress along the depth of subgrade, reinforced and unreinforced subgrade of graded-broken-stone-based asphalt concrete pavement under traffic loading was modeled by implicit dynamic FEM. Analytical results show that reinforcement can improve the vertical compressive stress distribution, and decrease shear stress transmitted to the surface of subgrade. The deviator stress on the upper part of reinforced subgrade is reduced distinctly, which is one of the key factors that can cause residual deformation. Therefore, reinforcement can restrain the development of residual deformation of subgrade induced by traffic loading.

Reserving the Sustainability of Flexible Pavement In Terms Of Microcrack Healing

2021 ◽  
Author(s):  
Saad Sarsam ◽  
Keyword(s):  
Fatigue Life ◽  
Asphalt Concrete ◽  
Concrete Pavement ◽  
Asphalt Mixtures ◽  
Asphalt Binders ◽  
Actual Behavior ◽  
Self Healing ◽  
Traffic Loading ◽  
Asphalt Cement ◽  
Asphalt Concrete Pavement

The fatigue life of Asphalt concrete pavement consists of two components, namely the resistance to fracture and crack, and the ability to heal the micro cracks. Both processes changes with temperature and time. Such processes exhibit the sustainability potential of asphalt concrete pavement. Repeated traffic loading and environmental impact causes deterioration in asphalt concrete pavement mixes and exhibit micro cracking and decreases its stiffness. However, due to the crack healing phenomena effect, asphalt mixes can demonstrate strength recovery and prolongs the fatigue life of asphalt mixtures. Many studies have been conducted to characterize the asphalt healing and its mechanisms. The approach to study this potential requires implementation of proper additives to the asphalt cement which can improve the self healing property of asphalt concrete and reserve the quality of the pavement. The aim of this work is to thoroughly understand the cracking and healing mechanisms and to define appropriate laboratory tests and type of additives which can increase the healing potential and can be used for a reliable performance-related selection and characterization of the asphalt binders, and the suitable asphalt concrete mixture based on the traffic loading and the environment issues. It was felt that it is essential to evaluate whether it is possible to achieve accelerated healing in asphalt mixtures within laboratory conditions, which could represent the actual behavior in the field. It was concluded that the process of healing is a sustainable measure and can be used to balance the damage process. The influence of several additives on the microcrack healing concept was discussed. The amount and rate of healing of asphalt cement which depend on several properties such as; its healing potential, stiffness, and surface free energy was also analized.

scholarly journals Application of Millimeter 3D Automatic Paving System in Highway Engineering Construction

2020 ◽  
Vol 1 (2) ◽  
Author(s):  
Yi DONG ◽  
Jie WANG ◽  
Yijia MAO ◽  
Hua LI
Keyword(s):  
High Precision ◽  
Asphalt Concrete ◽  
Asphalt Mixture ◽  
Concrete Pavement ◽  
Control Technology ◽  
Test Results ◽  
Engineering Construction ◽  
Highway Engineering ◽  
Pavement Construction ◽  
Asphalt Concrete Pavement

In the construction of asphalt mixture pavement, there are many paving construction procedures, high requirements for machinery and personnel, unreasonable technology and so on. In this paper, the millimeter-scale 3D automatic paving control technology of asphalt mixture pavement is studied with an engineering example. From the analysis of the test results in the later stage of construction, it can be seen that the technology has achieved the goal of high precision paving, and the successful application of the technology provides valuable reference experience for similar asphalt concrete pavement construction in the future.

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