Download or read book Demonstration and Field Evaluation of Alternative Portland Cement Concrete Pavement Reinforcement Materials written by James K. Cable and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The function of dowel bars is the transfer of a load across the transverse joint from one pavement slab to the adjoining slab. In the past, these transfer mechanisms have been made of steel. However, pavement damage such as loss of bonding, deterioration, hollowing, cracking and spalling start to occur when the dowels begin to corrode. A significant amount of research has been done to evaluate alternative types of materials for use in the reinforcement of concrete pavements. Initial findings have indicated that stainless steel and fiber composite materials possess properties, such as flexural strength and corrosion resistance, that are equivalent to the Department of Transportation specifications for standard steel, 1 1/2 inch diameter dowel bars. Several factors affect the load transfer of dowels; these include diameter, alignment, grouting, bonding, spacing, corrosion resistance, joint spacing, slab thickness and dowel embedment length. This research is directed at the analysis of load transfer based on material type and dowel spacing. Specifically, this research is directed at analyzing the load transfer characteristics of: (a) 8-inch verses 12-inch spacing, and (b) alternative dowel material compared to epoxy coated steel dowels, will also be analyzed. This report documents the installation of the test sections, placed in 1997. Dowel material type and location are identified. Construction observations and limitations with each dowel material are shown.
Download or read book Demonstration and Field Evaluation of Alternative Portland Cement Concrete Pavement Reinforcement Materials written by and published by . This book was released on 2003 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transverse joints are placed in portland cement concrete pavements to control the development of random cracking due to stresses induced by moisture and thermal gradients and restrained slab movement. These joints are strengthened through the use of load transfer devices, typically dowel bars, designed to transfer load across the joint from one pavement slab to the next. Epoxy coated steel bars are the materials of choice at the present time, but have experienced some difficulties with resistance to corrosion from deicing salts. The research project investigated the use of alternative materials, dowel size and spacing to determine the benefits and limitations of each material. In this project two types of fiber composite materials, stainless steel solid dowels and epoxy coated dowels were tested for five years in side by side installation in a portion of U.S. 65 near Des Moines, Iowa, between 1997 and 2002. The work was directed at analyzing the load transfer characteristics of 8-in. vs. 12-in. spacing of the dowels and the alternative dowel materials, fiber composite (1.5- and 1.88-in. diameter) and stainless steel (1.5-in. diameter), compared to typical 1.5-in. diameter epoxy-coated steel dowels placed on 12-in. spacing. Data were collected biannually within each series of joints and variables in terms of load transfer in each lane (outer wheel path), visual distress, joint openings, and faulting in each wheel path. After five years of performance the following observations were made from the data collected. Each of the dowel materials is performing equally in terms of load transfer, joint movement and faulting. Stainless steel dowels are providing load transfer performance equal to or greater than epoxy-coated steel dowels at the end of five years. Fiber reinforced polymer (FRP) dowels of the sizes and materials tested should be spaced no greater than 8 in. apart to achieve comparable performance to epoxy coated dowels. No evidence of deterioration due to road salts was identified on any of the products tested. The relatively high cost of stainless steel solid and FRP dowels was a limitation at the time of this study conclusion. Work is continuing with the subject materials in laboratory studies to determine the proper shape, spacing, chemical composition and testing specification to make the FRP and stainless (clad or solid) dowels a viable alternative joint load transfer material for long lasting portland cement concrete pavements.
Download or read book High performance concrete pavements written by and published by . This book was released on 2002 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Report written by Iowa State University. Department of Civil & Construction Engineering and published by . This book was released on 2002 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pavement Engineering written by Rajib B. Mallick and published by CRC Press. This book was released on 2013-03-27 with total page 697 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pavements are engineered structures essential to transportation, commerce and trade, and everyday life. In order for them to perform as expected, they must be designed, constructed, maintained, and managed properly. Providing a comprehensive overview of the subject, Pavement Engineering: Principles and Practice, Second Edition covers a wide range of topics in asphalt and concrete pavements, from soil preparation to structural design and construction. This new edition includes updates in all chapters and two new chapters on emerging topics that are becoming universally important: engineering of sustainable pavements and environmental mitigation in transportation projects. It also contains new examples and new figures with more informative schematics as well as helpful photographs. The text describes the significance of standards and examines traffic, drainage, concrete mixes, asphalt binders, distress and performance in concrete and asphalt pavements, and pavement maintenance and rehabilitation. It also contains a chapter on airport pavements and discusses nondestructive tests for pavement engineering using nuclear, deflection-based, electromagnetic, and seismic equipment. The authors explore key concepts and techniques for economic analysis and computing life-cycle cost, instrumentation for acquiring test data, and specialty applications of asphalt and concrete. The Second Edition includes more relevant issues and recently developed techniques and guidelines for practical problems, such as selection of pavement type, effect of vehicle tires, and use of smart sensors in rollers and software for drainage analysis. This book presents in-depth, state-of-the-art knowledge in a range of relevant topics in pavement engineering, with numerous examples and figures and comprehensive references to online resources for literature and software. It provides a good understanding of construction practices essential for new engineers and materials processing and construction needed for solving numerous problems.
Download or read book Evaluation of Fiber Reinforced Rapid setting Materials for Highway Repair written by Mark A. Temple and published by . This book was released on 1984 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laboratory and Field Evaluation of Rapid Setting Materials Used for Repair of Concrete Pavements written by Kevin G. Smith and published by . This book was released on 1984 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Alternative Pozzolanic Materials for Partial Replacement of Portland Cement in Concrete written by and published by . This book was released on 2017 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this project, University of Florida researchers identified underutilized materials which could be used for partial replacement of Portland cement in Florida concretes.
Download or read book Evaluation of Recycled Portland Cement Concrete Pavements for Base Course and Gravel Cushion Material written by Allen L. Cooley and published by . This book was released on 2007 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based upon the work conducted in this study, it was concluded the recycled portland cement concrete pavements are available as an option for the construction of gravel cushion and aggregate base course layers.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1983 with total page 1368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Maintenance rehabilitation Alternatives for Continuously Reinforced Concrete Pavement written by Terry L. Barnett and published by . This book was released on 1981 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laboratory and Field Evaluations of Rapid Setting Patching Materials for Portland Cement Concrete written by New York (State). Department of Transportation and published by . This book was released on 2006 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laboratory and Horizontal Field Evaluations of Rapid Setting Patching Materials Fof sic Portland Cement Concrete written by Ohio. Department of Transportation and published by . This book was released on 2008 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low Volume Portland Cement Concrete Pavement Performance Evaluation and Rehabilitation Strategy Selection written by James K. Cable and published by . This book was released on 1994 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study focused on the evaluation of all 43 existing portland cement concrete pavements in Boone County, Iowa. The research was directed at the evaluation of the factors effecting the performance the county pavements. Equations relating the design parameters to the commonly identified concrete distresses in pavements are also presented. The knowledge of practicing engineers was utilized to develop guidance in rehabilitation or reconstruction planning timing for concrete pavements in relation to the presence of pavement distresses. Field surveys were conducted to obtain the necessary construction and condition data for use in the study. Some 15 separate distress types by location on the pavement, were identified and used to direct data collection on 100% of the sample pavements. These distresses were further combined to provide seven different distress types for the detailed identification of performance factors. Graphical and statistical analyses were used to evaluate the effect of measured variables on the individual pavement distresses. Results indicate that the pavements have provided adequate design performance and also identified variables effecting the pavement performance that are not commonly identified. The analysis resulted in the development of individual equations relating individual distress levels to performance noted in the sample pavements. Each of 99 county engineers in Iowa and 102 county engineers or superintendents in Illinois was surveyed to develop a knowledge based system that identifies a range of distress levels associated with pavement rehabilitation or reconstruction in a "Time of Opportunity" table. It represents the county engineers' mental measure of when and where to perform rehabilitation and reconstruction. The combination of the performance parameter equations and the "Time of Opportunity" table provide the local road engineer with ways to objectively and/or subjectively evaluate the current concrete pavement system condition and make better decisions as to the proper steps to take in meeting public expectations in road performance.
Download or read book Laboratory and Horizontal Field Evaluations of Rapid Setting Patching Materials Fof sic Portland Cement Concrete written by and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laboratory and Horizontal Field Evaluations of Rapid Setting Patching Materials for Portland Cement Concrete written by New York (State). Department of Transportation and published by . This book was released on 2007 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laboratory and Horizontal Field Evaluations of Rapid Setting Patching Materials for Portland Cement Concrete written by and published by . This book was released on 2008 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt:
