64 percent of overall highway is concrete pavement, and the age of Chungbu highway is over. It is desirable to use same material for the maintenance of concrete pavement, but asphalt overlay is commonly used because lane closure time is directly related to the curing time of concrete. However, there is no study conducted on structural performance of concrete pavement after damaged surface cutting. Therefore, falling weight deflectometor was used to evaluate structural evaluation of both asphalt pavement overlay concrete after cutting and asphalt pavement overlay, and 1.5 time higher deflection and 5.5% reduced load transfer efficiency were observed in cutting overlay comparing against non-cutting overlay. These observations indicate that there is high possibility of reflective cracking in case of cutting overlay due to increased deflection and reduced load transfer efficiency

• 정우탁(한국도로공사 도로교통연구원, 연구원) | Jeong, Woo-Tak
• 강민수(한국도로공사 도로교통연구원, 공학박사) | Kang, Min-Soo
• 이경하(한국도로공사 도로교통연구원, 공학박사) | Lee, Kyung-Ha Corresponding Author
• 조문진(한국도로공사 도로교통연구원, 연구원) | Cho, Mun-Jin