Numerical Simulation of Reflective Crack Forming in Semi-Rigid Asphalt Pavement Subjected to Traffic Load

2011 ◽  
Vol 462-463 ◽  
pp. 599-604
Author(s):  
Xin Yu ◽  
Yin Fei Du
Keyword(s):  
Shear Failure ◽  
Asphalt Pavement ◽  
Bottom Layer ◽  
Traffic Load ◽  
Rigid Base ◽  
Technical Problems ◽  
Different Types ◽  
Symmetrical Load ◽  
Structural Layer ◽  
Load Numbers

Reflective crack is one of the major technical problems in highway with semi-rigid base, studying its formatting mechanism is of great significance. By means of a numerical analysis method named RFPA, formatting process of reflective crack such as initiation and expansion was studied in asphalt pavement with semi-rigid base. Two-dimensional model of asphalt pavement with cement-treated base was established based on mechanical parameters, thickness and homogeneity of commonly used structural layer in china, symmetrical and non-symmetrical load were both considered, and crack of cement-treated base was set before loaded. First, reasons for crack initiation were studied below the bottom layer subjected to different types of loads. The conclusion showed crack under symmetrical load mainly due to pull destruction while crack under non-symmetrical load mainly due to shear failure. Then, crack expansion in asphalt layer subjected to different load numbers with different homogeneity material was studied. The result showed that with the increase of the load numbers, the deformation in the same level deformation grows continuously. Different homogeneity level of layer material has an important influence on crack expansion; higher homogeneity has better regularity.

A Rutting-based Optimum Maintenance Decision Strategy of Hot In-place Recycling in Semi-rigid Base Asphalt Pavement

2021 ◽  
pp. 126663
Author(s):  
Yuanyuan Pan ◽  
Guoqiang Liu ◽  
Dong Tang ◽  
Dongdong Han ◽  
Xuanguo Li ◽  
...  
Keyword(s):  
Asphalt Pavement ◽  
Rigid Base ◽  
Decision Strategy ◽  
Maintenance Decision

scholarly journals Study on Strain Test Law of the Semi-rigid base Asphalt Pavement

2020 ◽  
Vol 772 ◽  
pp. 012117
Author(s):  
Feng Liu ◽  
Chuanhai Wu ◽  
Shanqiang Li ◽  
Xinquan Xu
Keyword(s):  
Asphalt Pavement ◽  
Rigid Base

Key Technique on the Process Control for Construction of Hohhot Circle Expressway Asphalt Pavements

2012 ◽  
Vol 256-259 ◽  
pp. 1748-1753
Author(s):  
Bin Zhao ◽  
Pei Wen Hao
Keyword(s):  
Inner Mongolia ◽  
Raw Materials ◽  
Asphalt Pavement ◽  
Load Capacity ◽  
Asphalt Mixture ◽  
Natural Increase ◽  
Rigid Base ◽  
Construction Technology ◽  
Pavement Structure ◽  
Major Section

As vehicle flow on arterial highway in Inner Mongolia sharply increased, the originally designed natural increase rate of 8% per year has been exceeded on the vehicle flow in some sections. According to statistics, monthly average vehicle flow on major section of G6 expressway has reached a standard flow of 67478 vehicles per day and night, of which in 70-80% are large ones for coal transportation. Therefore, pavement load and road capacity have exceed the designed expressway load capacity. At present, semi-rigid base asphalt pavement structure is still widely used for high-grade highway pavement in Inner Mongolia. With years of construction for such pavement structure, a great deal of valuable experience has been gained on construction technology. However, there are still a few deficiencies in the quality of raw materials, gradation control of asphalt mixture and adjustment of equipment, etc. Hohhot circle expressway connects with the G6 and G7 expressways, suffering from problems such as large vehicle flow and load overweight. This paper introduced a key technique that should be properly controlled during construction of such pavement structure, emphasized technique control and management of the following aspects, i.e. ballast sizes and gradation control, asphalt concrete mixture, adjustment of pavers, validation of mixing proportion in production and reasonable arrangement of process, and summarized corresponding technical measures taken during construction of asphalt pavement in this project.

Mechanical Response Analysis of the Composite Asphalt Pavement

2014 ◽  
Vol 1023 ◽  
pp. 28-31
Author(s):  
Li Min Li
Keyword(s):  
Service Life ◽  
Mechanical Response ◽  
Asphalt Pavement ◽  
Road Construction ◽  
Pavement Design ◽  
Rigid Base ◽  
Response Analysis ◽  
Early Failure ◽  
Short Service Life ◽  
Design Software

With the constant increasing of traffic flow and axle load, the early failure of semi-rigid base asphalt pavement is increasingly serious in China. The bad durability and short service life of pavement have become main obstacles in road construction development. Based on the experience of successful application, the early failure of semi-rigid base asphalt pavement is solved, and the service life of pavement is increased by using of the composite asphalt pavement. To solve the design problem of the composite asphalt pavement , its mechanical properties influence results of are obtained by the factors, such as shear strain, shear stress, compression strain on top of subgrade, etc, by a lot of calculation using Shell pavement design software. These provide theoretical basis for durable asphalt pavement design based on rut-resistance property.

Research on New Technology to Control Highway Semi-Rigid Base Asphalt Pavement Cracks

2011 ◽  
Vol 194-196 ◽  
pp. 1632-1638
Author(s):  
Hong Liang Deng ◽  
Xiao Yin Fu ◽  
Wen Xue Gao ◽  
Ting Ting Ni ◽  
Kai Jiang Chen
Keyword(s):  
Composite Materials ◽  
Theoretical Calculations ◽  
Asphalt Pavement ◽  
New Technology ◽  
Service Level ◽  
Self Control ◽  
Good Effect ◽  
Rigid Base ◽  
The Road ◽  
Absorbing Layer

The methods of controlling Highway semi-rigid base asphalt pavement cracks and other diseases are always hot fields of road engineering and academic circles. The existing methods are on some degree efficient on delaying the formation and extension of cracks, but the effect is limited with different methods and various mechanisms of preventing cracks. Base on force analysis of pavement, this article presents a new technology of crack controlling which uses intelligent composite materials interlayer. By adding a stress absorbing layer between the asphalt surface layers or the semi-rigid base layers with low modulus, good toughness, self-adaptability and self-control ability, the intelligent composite materials interlayer has a good effect on controlling cracks which has been proved by the theoretical calculations and experimental analysis. As a result, the intelligent composite materials interlayer could efficiently prevent and delay the formation and extension of cracks, the safety and comfort of highway could be improved significantly while the cost of construction and maintenance decreasing. And the service level and social image of the road could also be improved effectively. This research has important academic and application value.

Inversion Effect of Asphalt Pavement with Two Courses of Semi-Rigid Base

2018 ◽  
Vol 12 (3) ◽  
pp. 22-27
Author(s):  
Xiao-ge Tian ◽  
Hai-feng Han ◽  
Xin-wei Li ◽  
Dong Wu ◽  
Dong Wei
Keyword(s):  
Asphalt Pavement ◽  
Inversion Effect ◽  
Rigid Base
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