Loading Stress of Asphalt Overlay on Rubblized Cement Concrete Pavement and Related Resilient Modulus

2011 ◽  
Vol 5 (1) ◽  
pp. 7-12
Author(s):  
Linquan Guo ◽  
Yumin Zhou ◽  
Zhiming Tan
Keyword(s):  
Resilient Modulus ◽  
Concrete Pavement ◽  
Cement Concrete ◽  
Asphalt Overlay ◽  
Cement Concrete Pavement

Grouting Material Mix Proportion Test Research of Void the Old Cement Concrete Pavement Slab

2014 ◽  
Vol 912-914 ◽  
pp. 162-167
Author(s):  
Da Wei Lv ◽  
Guan Jun Xu ◽  
Xiao Li Sun
Keyword(s):  
Experimental Studies ◽  
Concrete Pavement ◽  
Service Performance ◽  
Cement Concrete ◽  
Bleeding Rate ◽  
Asphalt Overlay ◽  
Grouting Material ◽  
Mix Proportion ◽  
Cement Concrete Pavement ◽  
Mixing Proportion

The effective treatment of void cement concrete pavement slab through grouting technology is the important premise of ensuring the service performance of asphalt overlay engineer on cement concrete pavement. Based on the current problems of grouting technology, we did experimental studies on the mixing proportion of grout slurry and analyzed the effects of slurry composition and admixture type on mechanical properties including the strength, mobility, viscosity, expansion rate and bleeding rate of the slurry and on the service performance. Based on these, we put forward the control indexes for grouting slurry mix proportion determination which provided guidance for the design and construction quality control of grouting under the old cement concrete pavement slab.

Analysis the Control Techniques of Reflection Crack on Asphalt Overlay of Old Cement Concrete Pavement

2012 ◽  
Vol 204-208 ◽  
pp. 1945-1948 ◽  
Author(s):  
Jue Wang
Keyword(s):  
Main Type ◽  
Concrete Pavement ◽  
Pavement Performance ◽  
Cement Concrete ◽  
Paper Briefly ◽  
Control Techniques ◽  
Asphalt Overlay ◽  
Cement Concrete Pavement ◽  
Reflection Crack ◽  
Technical Measures

Cement concrete pavement is the main type of highway pavement in our country. The asphalt overlay on old concrete pavement is one of the main measures to improve the pavement performance, to improve the bearing capacity and extended service life. But, the prevention of reflection cracks is a key problem need to overcome. This paper briefly analyzes cause of the formed mechanism of reflecting crack of bituminous paving course on old cement concrete pavement, and elaborated some major technical measures of preventing or retarding reflection cracks.

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.

The Thermal Stress Analysis on Stress Absorption Interlayer of Asphalt Overlay

2012 ◽  
Vol 174-177 ◽  
pp. 570-574
Author(s):  
Peng Tao Xue ◽  
Xiu Shan Wang
Keyword(s):  
Shear Stress ◽  
Thermal Stress ◽  
Vertical Displacement ◽  
Concrete Pavement ◽  
Laminar Shear Stress ◽  
Cement Concrete ◽  
Bottom Stress ◽  
Asphalt Overlay ◽  
Cement Concrete Pavement ◽  
Laminar Shear

By using finite element method, the thermal stress of stress absorption interlayer of asphalt overlay on the cement concrete pavement is analyzed in this paper. The result shows that the inter-laminar shear stress and the structural vertical displacement are influenced by the thickness of stress absorption layer, while the asphalt bottom stress is less affected; the increase of the modulus is unfavorable to the structural vertical displacement, the inter-laminar shear stress and the asphalt bottom stress.

Study on Design Method for Asphalt Overlay on Old Cement Concrete Pavement in Shanxi Province on Trunk Highway

2014 ◽  
Vol 556-562 ◽  
pp. 977-983 ◽  
Author(s):  
Hui Wang ◽  
Jiu Peng Zhang
Keyword(s):  
Mechanical Response ◽  
Design Method ◽  
Concrete Pavement ◽  
Shanxi Province ◽  
Reflective Cracking ◽  
Cement Concrete ◽  
Heavy Load ◽  
Improvement Project ◽  
Asphalt Overlay ◽  
Cement Concrete Pavement

In view of the the imperfection of design method of asphalt overlay on old cement under heavy-load traffic, and with the background of a successful practice of repaving improvement project in Xia Jiaying-Fen Yang expressway, this article analyzes the mechanical response of the old cement concrete road slab and the overlay, takes the influence of the void under slab on the life expectancy of asphalt overlay into account, and advances the mechanistic-empirical design process of asphalt overlay under heavy-load traffic. In comparison with Chinese standard, this method takes the influence of old concrete pavement on the reflective cracking of overlay into consideration, which ensures that there is no reflective cracking on the overlay in 3 years.

scholarly journals Reflection Crack Analysis of Asphalt Overlay on Cement Concrete Pavement Based on XFEM

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Qiang Li ◽  
Zhixiang Chen ◽  
Shaohui Luo
Keyword(s):  
Asphalt Mixture ◽  
Three Dimensional ◽  
Concrete Pavement ◽  
Cement Concrete ◽  
Extended Finite Element ◽  
Reflection Cracking ◽  
Asphalt Overlay ◽  
Cement Concrete Pavement ◽  
Cracking Characteristics ◽  
Predicted Values

Based on the improved Paris formula, the reflection cracking characteristics of asphalt overlay on the cement concrete pavement are carefully scrutinized. The fatigue life is also predicted through the indoor simulation tests and establishing the two- and three-dimensional extended finite-element method (XFEM) models. Four fracture factors of the Paris formula in the asphalt mixture are appropriately calculated by fitting the N-a curve of the indoor test, and their predicted values are then exploited in the numerical simulations. The obtained results show that the numerical model can successfully predict the results of the indoor simulation test. It indicates that the XFEM has apparent advantages in examining the reflection cracking of the asphalt overlay on the cement concrete pavement.

The Elastic Parameters Analysis of Asphalt Overlay the Crashed Cement Concrete Pavement Based on Reliability Theory

2011 ◽  
Vol 99-100 ◽  
pp. 16-20
Author(s):  
Ying Wang ◽  
Lu Yang
Keyword(s):  
Elastic Modulus ◽  
Reliability Index ◽  
Mechanical Response ◽  
Reliability Theory ◽  
Concrete Pavement ◽  
Cement Concrete ◽  
Elastic Parameters ◽  
The Road ◽  
Asphalt Overlay ◽  
Cement Concrete Pavement

Overlay asphalt on the crashed cement concrete pavement is used widely in old cement concrete pavement reconstruction. at present, Aiming at the differences of mechanical response of this compound pavement structure system, paper introduced the road deflection as the control index and discussed the influence to road reliability index caused by elastic parameters of each layer as well as the sensitivity analysis based on the stochastic finite element method and reliability theory. Results show that the reliability index is greater as the asphalt overlay elastic modulus and crashed layer elastic modulus is increasing and lower as the increase of coefficient of variation, also the elastic modulus of asphalt overlay play a most important role in the diversification of deflection and bottom stress.

Analysis of the Mode of Crushing and Stability in Old Cement Pavement during Asphalt Overlay Project

2012 ◽  
Vol 204-208 ◽  
pp. 1941-1944 ◽  
Author(s):  
Hua Wang ◽  
Yun Feng Wu ◽  
Song Ye
Keyword(s):  
Concrete Slab ◽  
Relative Displacement ◽  
Concrete Pavement ◽  
Construction Technology ◽  
Reflective Cracking ◽  
Cement Concrete ◽  
Asphalt Overlay ◽  
Cement Concrete Pavement ◽  
Pressure Impact

In the process of old cement concrete pavement is transformed, asphalt overlay is the common method. However, due to the cracks of the original cement concrete slab when load and temperature and humidity changes will produce a relative displacement, it can not avoid reflective cracking. So in order to prevent the reflective cracking of asphalt overlay, crush the old cement concrete pavement is the important manner. Different construction technology is divided into three kinds: cracked steady pressure, impact compaction and rubblization technology. Among these, rubblization is an important technology that utilizes in-situ crushing technique in cement concrete pavement. This article discusses the characteristics of these three techniques, and it also evaluates effectiveness.

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