Lab Simulation Study on Anti-Cracking Performance of Asphalt Concrete Overlays for Fatigue

2012 ◽  
Vol 510 ◽  
pp. 478-483 ◽  
Author(s):  
Zu Zhong Li ◽  
Shuan Fa Chen ◽  
Wei Dong Liao ◽  
Rui Xing Yuan
Keyword(s):  
Asphalt Concrete ◽  
Early Stage ◽  
Asphalt Mixture ◽  
Concrete Pavement ◽  
Modified Asphalt ◽  
Concrete Overlays ◽  
Cement Concrete Pavement ◽  
Cracking Performance ◽  
The One ◽  
Asphalt Overlays

Currently, researches on anti-cracking performance of asphalt concrete overlays on old concrete pavement for fatigue are still in the early stage of explorations and trials. The reflective crack simulation tests of bending and shearing styles with six asphalt overlays were carried out in order to evaluate the anti-cracking effects of different kinds of anti-cracking materials. It is suggested that Sampave modified asphalt mixture with independent development has excellent anti-cracking performance for fatigue, which provides an experimental reason for extending the anti-cracking technique in stress absorbing layers. Although anti-cracking performances of glass fiber grid and tricot geofabric reinforced composites are better, it is not as good as the one of Sampave. And the effect of paving asphalt concrete directly on old cement concrete pavement is worse.

Field Performance Evaluation of High Polymer-Modified Asphalt Concrete Overlays

2022 ◽  
pp. 036119812110657
Author(s):  
Jhony Habbouche ◽  
Ilker Boz ◽  
Brian K. Diefenderfer ◽  
Benjamin F. Bowers
Keyword(s):  
Survey Data ◽  
Asphalt Concrete ◽  
Asphalt Mixture ◽  
Field Performance ◽  
Pavement Management ◽  
High Polymer ◽  
Polymer Modification ◽  
Modified Asphalt ◽  
Concrete Overlays ◽  
Polymer Modified Asphalt

The objective of this paper was to assess the viability of using high polymer (HP) modified asphalt concrete (AC) mixtures in Virginia as a reflective crack mitigation technique or when deemed appropriate as a tool for increased crack resistance on higher volume facilities. This was achieved by compiling and evaluating routine distress survey data against pre-paving distress survey data for relevant in-service HP pavements constructed between 2015 and 2018 and comparing them with several control in-service conventional polymer-modified asphalt (PMA) pavements. This is the first effort in North America to provide a detailed field performance of HP AC mixtures. In general, none of the evaluated mixtures (HP or PMA) was able to prevent reflective cracking completely. The HP sections showed the most promising performance 5 years after construction regardless of traffic level and the pre-existing pavement conditions. The pavement management system data for the reviewed sections indicated a potential controlling effect of the joint condition of the underlying jointed concrete pavement layer regardless of the asphalt mixture type employed (PMA or HP). Moreover, performance evaluations using the network-level pavement management data were conducted to estimate the life expectancy of HP AC overlays. Two different approaches and three levels of analysis were undertaken. Overall, PMA and HP AC overlays had an average predicted service life of 6.2 and 8.3 years, respectively, indicating a 34% extension of performance life of the AC overlays with high polymer modification.

Research on anti-fatigue ability of Sisal Fiber Asphalt Mixture Pavement

2013 ◽  
Vol 405-408 ◽  
pp. 1782-1785
Author(s):  
Zi Ye He ◽  
Fu Xue Liu
Keyword(s):  
Asphalt Concrete ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Fatigue Cracking ◽  
Concrete Pavement ◽  
Pavement Performance ◽  
Sisal Fiber ◽  
Viscoelastic Parameters ◽  
Cracking Performance ◽  
Asphalt Concrete Pavement

Fatigue crack is one of the main road damage forms of asphalt pavement structure, and serious impact the asphalt pavement performance and service life. Asphalt mixture has typical viscoelastic,and can get Burgers model and viscoelastic parameters form creep test. Using finite element method of fracture mechanics, simulation under dynamic loading, research crack extending behavior of common asphalt concrete pavement and mixed with 0.2% of sisal fiber asphalt concrete pavement. From the results, it can find out that when mixed with sisal fiber, the anti-fatigue cracking performance is obvious enhancement.

Covering and Reinforcement Key Technologies of Airport Old Cement Concrete Pavement

2012 ◽  
Vol 193-194 ◽  
pp. 843-846
Author(s):  
Bao Hua Shi ◽  
Wen Pu Ning ◽  
Han Wei Wang ◽  
Tao Sun
Keyword(s):  
Life Span ◽  
Asphalt Concrete ◽  
Concrete Pavement ◽  
Main Task ◽  
Concrete Pavements ◽  
Cement Concrete ◽  
Treatment Methods ◽  
Key Technologies ◽  
Cement Concrete Pavement

Cement concrete pavements were used in most airports built early in China. Nowadays the main task of airports is how to cover and reinforce damaged pavements. To ensure the life-span of pavement after covering, on the basis of analyzing the treatment methods of original cement concrete pavement, cement and asphalt concrete were used to realize the covering and reinforcement of old cement concrete pavement, and key technologies of Preventing reflective cracks of concrete pavement were put forward, which had a good result in practice

Research on the Temperature Stress Field of Interface End between Asphalt Concrete Overlay and Concrete Pavement

2010 ◽  
Vol 160-162 ◽  
pp. 1704-1711
Author(s):  
Yu Wei Zhang ◽  
Qing Guo Yang ◽  
Zhi Zhong Tu
Keyword(s):  
Elastic Modulus ◽  
Stress Field ◽  
Asphalt Concrete ◽  
Interface Design ◽  
Concrete Pavement ◽  
Crack Tip Field ◽  
Initial Stress Field ◽  
Asphalt Overlay ◽  
Paving Asphalt ◽  
Cement Concrete Pavement

For the interface end formed after paving asphalt overlay on cement concrete pavement, the stress field of interface end is very important for both structural analysis and interface design when the temperature drops. The stress field of interface end can be gotten with the crack-tip field theory that consider displacement continuation and stress equality on each side of interface, but it needs further verification to prove whether the initial stress field can satisfy far field boundary condition when temperature dropping. In conditions of different material properties, different plane dimension and different thickness of asphalt overlay the stress field is calculated with the finite element method (FEM), and the results show that the forms of theoretical solution can exactly describe stress field of the interface end when temperature dropping. The stress field of interface end indicates that when the elastic modulus of asphalt overlay becomes lager, the stress singularity’s degree of interface end will reduce. As for the interface end formed after paving asphalt concrete overlay on the concrete pavement, improving the elastic modulus of asphalt overlay is beneficial.

Influences on the Axle Load Stress of the Cement-Concrete Pavement Structure Caused by the Crack or Cutting Crack of the Semi-Rigid Base

2013 ◽  
Vol 857 ◽  
pp. 200-203
Author(s):  
Bin Yang ◽  
Hua Tan ◽  
Jia Xi Deng ◽  
Chan Pang
Keyword(s):  
Working Conditions ◽  
Crack Width ◽  
Concrete Pavement ◽  
Rigid Base ◽  
Cement Concrete ◽  
3D Fem ◽  
Cement Concrete Pavement ◽  
Dry Shrinkage ◽  
Pavement Structure ◽  
The One

Some horizontal cracks will appear during the strength formation of the semi-rigid base, for the influences of dry shrinkage and temperature shrinkage exist, so the engineers often adopt the manual method of equidistant cutting crack to avoid the irregular cracks. In order to analyse the influences on the axle load stress of the cement-concrete pavement slab which caused by the width and position of the base cracks or cutting cracks, the 3D FEM was used to study them under the different working conditions considering the crack, width and position. By the above research, the results show the existing cracks affect the integrity and continuity of the pavement structure; The crack width has no large influence on the stress of the pavement slab, while the base stress decreases apparently with the increasing width, and it becomes stable finally; The stress of the pavement slab is maximum when the crack or cutting crack is located in the middle, while it's small when the crack or cutting crack is located in the one fourth of the pavement slab.

The Research on the Temperature Resistance Test of Polypropylene Geotextile in Asphalt Overlay

2012 ◽  
Vol 178-181 ◽  
pp. 1287-1292
Author(s):  
Rong Guo Hou ◽  
Bo Tian ◽  
Lei Quan
Keyword(s):  
High Temperature ◽  
Melting Point ◽  
Asphalt Mixture ◽  
Concrete Pavement ◽  
Temperature Fields ◽  
Cement Concrete ◽  
Modeling And Analysis ◽  
Temperature Resistance ◽  
Asphalt Overlay ◽  
Cement Concrete Pavement

The melting point of polypropylene geotextile is 170 centigrade. However, during the repaving design of the old cement concrete pavement, the paving temperature of the asphalt mixture is often 160-170 centigrade or above. Therefore, it is very important to verify that whether the polypropylene geotextile can be paved under a high temperature. Through the modeling and analysis of temperature fields and relevant temperature tests in the laboratory, the paper has tested the surface temperatures of the polypropylene geotexile when the asphalt mixture is paved under a high temperature. The results show that, under a simulated paving temperature of over 190 centigrade, the highest temperature of polypropylene geotextile is only about 160 centigrade, which is lower than its melting point. Therefore, the polypropylene geotextile can be used for the paving under a high temperature.

Sign in / Sign up

Export Citation Format

Share Document