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The Comprehensive Treatment of Existing Cement Concrete Pavement and the Design of Asphalt Concrete Overlay on It

Author: SunYeXiang
Tutor: WangJianGuo
School: Hefei University of Technology
Course: Civil and Architectural Engineering
Keywords: Highway Old Cement Concrete Pavement Pavement structure evaluation Breakage Causes Asphalt overlay alterations Construction Quality Control Reflective cracking
CLC: U416.2
Type: Master's thesis
Year: 2008
Downloads: 317
Quote: 3
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Abstract


Nobuhiro highway traffic increased significantly , especially in overloaded vehicles a substantial increase , resulting in the destruction of cement concrete pavement driving comfort in urgent need of the alteration of Repaving . Repaving Project of relying on the transformation of the old cement concrete pavement Xuanguang Expressway detailed investigation through on-site testing , indoor test to understand and grasp the the panel damaged condition of the original cement concrete pavement , the panel and the strength of the soil base status of the pavement structure evaluation ; detailed analysis of road damage cause to take corresponding countermeasures , that most of the sections of impact compaction technology or gravel technical processing and processing sections of the two technologies can not be used to take the appropriate measures , respectively, depending on the disease . Asphalt overlay of the existing cement concrete pavement is the core content of the entire conversion engineering , combined with the alteration of the type of project experience through the multilayer flexible system theory , and to determine the asphalt concrete overlay structure , and learn from the United States four methods of checking . At the same time , non - stamping sections taken laying of geotextile and other technical measures to prevent reflective cracking . Explore the design of overlay materials and asphalt overlay has been the general conclusion : the old cement concrete slab Treatment and perfect drainage is the key link of the entire overlay alteration works ; impact compaction and gravel technology is to deal with the old concrete slab , prevent reflective crack a good way ; improve the asphalt content can effectively improve the shear strength of the asphalt mixture ; molding asphalt mixture , the optimum asphalt ratio road performance are well positioned to meet the technical requirements of the specification ; of BST polyester fiber to some extent to improve the performance of water-stable , significantly improved resistance to rutting mixture and reduce the amount of deformation ; different materials and structures layer Reflective Cracking differences original concrete slab modulus ; pavement design does not have too much to consider to improve the foundation modulus is very effective in the prevention of reflective cracking in the the overlay asphalt surface before . The the asphalt overlay conversion works construction quality control is the key link of the conversion works , asphalt mixing , transportation , paving , compaction must meet regulatory requirements , construction error within a specified range .

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CLC: > Transportation > Road transport > Road works > Roadbed, pavement engineering > Pavement Engineering
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