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| Author | : Shiraz D. Tayabji |
| Publisher | : |
| Total Pages | : 124 |
| Release | : 1986 |
| Genre | : Pavements |
| ISBN | : |
Field load testing was conducted by CTL at five sites in Iowa during April 1986. This report presents the results of field testing, analysis of results, and recommendations to incorporate study results in Iowa's design procedure for bonded concrete overlays.
| Author | : Lucas Agustin Lahitou |
| Publisher | : |
| Total Pages | : 53 |
| Release | : 2009 |
| Genre | : Pavements |
| ISBN | : |
| Author | : John Michael Hart |
| Publisher | : |
| Total Pages | : 404 |
| Release | : 2000 |
| Genre | : |
| ISBN | : |
Laboratory testing and full-scale field testing were used to accomplish the research objective. Laboratory testing involved monitoring interface strains in fabricated PCC/ACC composite beams subjected to either static or dynamic flexural loading. Variables investigated included ACC surface preparation, PCC thickness, and synthetic fiber reinforcement usage. Field testing involved monitoring interface strains and temperatures, falling weight deflectometer deflection responses, direct shear strengths, and distresses on a 7.2 mile Iowa Department of Transportation UTW project (HR-559). Variables investigated included ACC surface preparation, PCC thickness, synthetic fiber reinforcement usage, and joint spacing. The results of both laboratory and field testing are presented and summarized in this paper.
| Author | : Gordon Daring |
| Publisher | : |
| Total Pages | : |
| Release | : 1983 |
| Genre | : Pavements, Concrete |
| ISBN | : |
| Author | : |
| Publisher | : |
| Total Pages | : 128 |
| Release | : 1989 |
| Genre | : Ground penetrating radar |
| ISBN | : |
The purpose of this project was to evaluate the location and quantities of debonding in selected portland cement concrete (PCC) overlays. The project entailed an infrared thermographic survey and a ground penetrating radar survey of the PCC overlays to locate areas of debonding between the overlays and the original pavement. An infrared scanner is capable of locating these areas because of the temperature differential which is established between bonded and debonded areas under certain environmental conditions. A conventional video inspection of the top surface of the pavement was also completed in conjunction with the infrared thermographic survey to record the visual condition of the pavement surface. The ground penetrating radar system is capable of locating areas of debonding by detecting return wave forms generated by changes in the dielectric properties at the PCC overlay original pavement interface. This report consists of two parts; a text and a set of plan sheets. The text summarizes the procedures, analyses and conclusions of the investigation. The plan sheets locate specific areas of debonding, as identified through field observations.
| Author | : Walter P. Kilareski |
| Publisher | : |
| Total Pages | : 136 |
| Release | : 1990 |
| Genre | : Pavements |
| ISBN | : |
A major field study and evaluation has been conducted into the effectiveness of three structural overlay types for portland cement concrete (PCC) pavements. These include sawing and sealing asphalt concrete (AC) overlays of PCC pavements, cracking and seating PCC pavements prior to AC overlay, and constructing a thin bonded PCC overlay on top of the existing PCC pavement. Condition surveys, deflection testing, and roughness measurements were performed on a total of 55 sections. The performance of these sections was evaluated and the effectiveness of each overlay type analyzed.
