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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
International Journal of Highway Engineering
Journal Basic Information
Journal DOI :
Korean Society of Road Engineers
Editor in Chief :
Volume & Issues
Volume 4, Issue 4 - Dec 2002
Volume 4, Issue 3 - Sep 2002
Volume 4, Issue 2 - Jun 2002
Volume 4, Issue 1 - Mar 2002
Selecting the target year
Evelopment of a Practical Mechanistic-Empirical design Procedure for Flexible Pavements
Park, Dong-Yeob ; Kim, Hyung-Bae ; Buch, Neeraj ; Suh, Young-Chan ;
International Journal of Highway Engineering, volume 4, issue 3, 2002, Pages 1~13
Design methods for new flexible pavements and overlays are in the transition from empirical to mechanistic approach, and many state highway agencies trend to move toward the adoption and use of mechanistic-empirical (M-E) design in new constructions and rehabilitations of flexible pavements. Hence, the Michigan Department of Transportation (MDOT) decided to develop a M-E flexible pavement design procedure, in which major pavement distresses such as fatigue cracking and rutting are employed as indicators of the serviceability of a flexible pavement. The main concept of the developed design procedure is that a designed pavement that is supposed to carry a certain number of traffic must satisfy designated thresholds of rut depths and fatigue lives during a service period. For the M-E design procedure, transfer functions were developed to predict rut-depths and fatigue lives. These functions related the pavement responses to pavement performance. For validation, three current new flexible pavement design cases were obtained from the MDOT. In these cases, asphalt concrete (AC) layer thicknesses determined by the suggested M-E procedure compare favorably with those determined by the current MDOT design practice that is based on AASHTO design guide. This finding implies that the suggested Michigan M-E flexible pavement design procedure can provide a good opportunity to improve the current design practice.
Tensile Adhesive Chracteristics of Waterproofing System for Concrete Bridge Decks
Lee, Byung-Duck ; Shim, Jae-Won ; Park, Sung-Ki ; Kim, Kwang-Woo ;
International Journal of Highway Engineering, volume 4, issue 3, 2002, Pages 15~23
The waterproofing system's performance is known to show a determing by complex interaction of material factors, design details, and the quality of construction, and the waterproofing integrity of waterproofing membranes is determined by the bond to the deck and the amount of damage to the waterproofing membrane. In this research, the basic properties of waterproofing membranes on market and the tensile adhesive chracteristics of waterproofing systems of concrete bridge deck have also been investigated in the view of the damages frequently reported from job site. For the tensile adhesive strength of sheet waterproofing membranes, the results after asphalt concrete paving tends to increase more than before those. The results of the liquid waterproofing membranes are upside-down, and the more concrete has strength, the more strength of tensile adhesive increase. The ambient temperature of asphalt concrete when application of the waterproofing membrane has considerable influence on the performance of waterproofing system. As described above, waterproofing system can be influenced by several factors. If they are not considered under construction, the overlooking will cause the damages of pavement and waterproofing system after traffic opening.
A Study on Decision Criteria of traffic volumes for Choosing of Modified Asphalt Pavement in Korea National Highway
Kwon, Soo-Ahn ; Jeong, Kyoung-Young ; Suh, Young-Chan ;
International Journal of Highway Engineering, volume 4, issue 3, 2002, Pages 25~33
Most national highways are paved with asphalt. Since increased traffic volume and high temperature have reduced the service life of pavements, modified asphalt pavements or stone mastic asphalt (SMA) have gradually been adopted. However, pavement engineers have difficulty to select pavement types due to lack of standard specifications for these new pavement types. In this study, service lives of general asphalt pavements based on traffic volume were analyzed using the inventory data of pavement management system (PMS) collected for last 10 years. The results showed 9.5 and 5.6 year average service lives for new constructed pavements and overlays, respectively. The traffic volumes for the design life of 10 years was presented based on confidence levels using service life distributions of current pavements. For the confidence level of 90%, 2,300 ESAL was obtained; 1,500 ESAL for the confidence level of 80%. This indicates that modified asphalt pavements should be considered for sections with the higher traffic volume.
Tensile Strength of Polymer-Modified Asphalt Concrete at Low-Temperature
Doh, Young-Soo ; Kwon, Seung-Zoon ; Kim, Kwang-Woo ;
International Journal of Highway Engineering, volume 4, issue 3, 2002, Pages 35~42
Many temperature-related problems are created in asphalt pavement due to the low temperature. In particular, loss of tensile strength due to low temperature is known to be responsible for thermal failure of pavements in cold regions under
. The objective of this study is to evaluate characteristics of resistance against low-temperature cracking of polymer asphalt concrete mixtures modified with LDPE and SBS. The test results showed that the mixtures had the maximum indirect tensile strength(ITS) at low temperature ranging from
. It was proved through ITS test that the stress due to differential thermal contraction over the tensile strength did generate internal damage at the temperature below
. It was shown that the asphalt mixtures modified with polymer had better ITS than the normal asphalt mixture at the temperature below
. Thus the effect of modification was revealed as tensile strength improvement. From the results of this study, it was recommended that polymer-modified asphalt should be used in order to prevent low-temperature cracking in cold region.
Evaluation of Performance and Construction the New National Test Road Sites of Modified Asphalt
Cho, Gyu-Tae ;
International Journal of Highway Engineering, volume 4, issue 3, 2002, Pages 43~49
Asphalt pavements have to perform under the conditions of heavily-loaded vehicles due to the industrialization and large temperature variance between the summer and the winter. Due to these factors, a characteristics change of early permanent deformation becomes a big issue, and to remedy this problem many research to use modified asphalt are being widely conducted. However, most of the modified asphalt is being paved after milling the surface course and applying tackcoating, and it is being used mostly for the repair and maintenance purpose rather than pavement of new national road. The purpose of this investigation is to obtain some fundamental data for the evaluation of the performance and long-term performance of the construction material mixtures by the laboratory test and field experiments. For the field experiment, 200m of two-lanes national road, that is being paved for the new national road under the direction of Pusan Regional Construction Management Office, was paved with SBS PMA and PSMA asphalt mixtures, which are an modified asphalt mixtures used for the surface course, on top of the base course paved with other modified asphalt mixtures. The remaining section of the new national road was paved with dense grade mixture. The laboratory tests assessed and analyzed the mixture characteristics by Marshall's stability test, strength tests and wheel-tracking test. On the basis of the evaluation result of the temperature control and roughness of the newly constructed road at the field experiment site, it is desired to evaluate and identify the most economic modified asphalt mixtures by long-term performance evaluation and LCC(Life Cycle Cost) analysis in order to apply the test result to the design of new road construction in the future.