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.

Effects of Fly Ash Content on the Strength Property of Cement Concrete Pavement

2012 ◽  
Vol 174-177 ◽  
pp. 403-408
Author(s):  
Hong Guo Zhang ◽  
Xiu Shan Wang ◽  
Pei Wen Hao
Keyword(s):  
Fly Ash ◽  
Cement Mortar ◽  
Experimental Tests ◽  
Ash Content ◽  
Concrete Pavement ◽  
Cement Concrete ◽  
Addition Method ◽  
Cement Ratio ◽  
Cement Concrete Pavement ◽  
Mixing Proportion

Using ordinary material, calculating through the external addition method and then adjusting through experimental tests, the mixing proportion of cement mortar is determined. The testing results show that: when the water cement ratio is 0.50, the fly ash content is too large and the strength of cement mortar will sharply decrease with the increase of its content. Therefore, the fly ash content in engineering cannot exceed 30% of the gelled material.

The Optimized Design for Groove Parameters Based on Cement Pavement Materials Performance

2011 ◽  
Vol 213 ◽  
pp. 613-617
Author(s):  
Yong Shou Yang ◽  
Xiong Yi ◽  
Peng Hu ◽  
Qiang Dong
Keyword(s):  
Theoretical Analysis ◽  
Laboratory Tests ◽  
Optimal Choice ◽  
Concrete Pavement ◽  
Service Performance ◽  
Optimized Design ◽  
Cement Concrete ◽  
Pavement Materials ◽  
Cement Concrete Pavement

Aiming at the service performance characteristics of cement concrete pavement, this paper puts forward optimized design concept for groove parameters of cement pavement. Single groove parameter optimal choice is systematically analyzed based on integrated service quality of cement pavement. Through a variety of multi-contrast laboratory tests and theoretical analysis, from three aspects of anti-slide, strength, and noise reduction, optimized design scheme of groove parameters are demonstrated and proposed, and groove parameters and form suitable for environment characteristics in seasonal frozen region are given.

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.

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