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민영 남궁
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1 Behavior Evaluation of Thin Bonded Continuously Reinforced Concrete Overlay on Aged Jointed Concrete Pavement(2) Ryu, Sung Woo ( htsrsw@naver.com) Cho, Yoon-Ho ( yhcho@cau.ac.kr) ABSTRACT In this paper, it has been studied about the CRCO to maintain or rehabilitate the aged JCP. The CRCO and JCO was constructed at useless section of Seo-Hae-Ahn express highway in South Korea. The performance evaluation was conducted. Especially, it was focused on the roll of longitudinal reinforced steels inserted into the CRCO. On crack survey results from field construction section, the reflection cracks at joint of the existing pavement occurred in CRCO. However, due to the constraints of longitudinal reinforced steels, crack width was small. Total crack length and quantity in the CRCO more than that in the JCO. And crack spacing in the CRCO was narrower than it in the CRCP. Through the bonding strength test results, if the cold milling and cleaning as well as surface treatment is applied, there will be no debonding problem at interlayer in the early age. From analysis of the horizontal behavior at the joint, the longitudinal reinforced steels constrained crack width which became wider than initial state over time. Also, that steel in the CRCO reduced the horizontal movement due to temperature variation(4 times than that in the JCO). But, if interface is debonded, the roll decreased. Vertical VWG data showed that CRCO did not occur debonding problem at steel location, but there was some problem in JCO. It was confirmed by field coring. The tensile strain appeared in the CRCO, But the compressive strain occurred in the JCO in early age. Through the FWD test result, deflection in the CRCO was less than that in the JCO. And K value in the CRCO was greater than it in the JCO. KEYWORDS maintenance and rehabilitation, thin bonded concrete overlay, jointed concrete overlay(jco), concrete overlay, FWD 101

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10 KS F 2386, AASHTO (1993) AASHTO Guide for Design of Pavement Structures, Washington, D.C. Bagate, M., McCullough, B. F., Fowler, D. W., and Muthu, M., An Experimental Thin-Bonded Concrete Overlay Pavement, Research Report 357-2F, Center for Transportation Research, The University of Texas at Austin, November Cesar Ivan M.C., Seong-Cheol C., and Moon Won, Concrete Pavement Overlays and Failure Mechanisms, Center for Transportation Research, Report No , CRT, Concrete Pavement Overlays and Failure Mechanisms, CTR, Delamination of Boned Concrete Overlays at Early Ages, Delatte, N. J., Grater, S. F., Trevino-Frias, M., Fowler, D. W., McCullough, B. F., Partial Construction Report of a Bonded Concrete Overlay on IH- 10, El Paso and Guide for Expedited Bonded Concrete Overlay Design and Construction, Report F, Center for Transportation Research, The University of Texas at Austin, Austin, Texas, December Delatte, N. J. and Laird, J. T. II, Performance of Bonded Concrete Overlays 1998, TRB Felt, Earl J., Resurfacing and Patching Concrete Pavements with Bonded Concrete, HRB Proceedings, Vol. 35, Washington D. C., 1956 George Calvert, John Lane Jr., Chris Anderson, Thin Bonded Concrete Overlay With Fast Track, Final Report, 1990 German Claros, Moon Won, Project Summary, O-4893 : performance of old concrete under thin overlays, TxDOT IDOT, Thinbonded concrete overlay with fast tack concrete, Final report for Iowa DOT project HR-531, 1990 Kailasananthan, K., McCullough, B.F., and Fowler, D.W., A Study of the Effects of Interface Condition on Thin Bonded PCC Overlays, Research Report 357-1, Center for Transportation Research, The University of Texas at Austin, December Manuel Trevino, Cesar Ivan Medina-Chavez, and Moon Won, Preliminary Findings of Performance of Old Concrete under Thin Overlays, Marks, V.J., A Fifteen Year Performance Summary of Fibrous PC Concrete Overlay Research in Greene County, Iowa, Fifteen Year Report for Iowa Highway Research Board, Research Project HR-165, Iowa Department of Transportation, August Marks, V. J., Thin Bonded Portland Cement Concrete Overlay, Final Report for Iowa Department of Tranportation Project HR-521, Federal Highway Project DTFH IA-11, November Michael M. Sprinkel, Celik Ozyildirim, Evaluation of Hydraulic Cement Concrete Overlays Placed on Three Pavements in Verginia, VTRC 01-R2, National Concrete Pavement Technology Center, Guide To Concrete Overlay Solutions, Norbert Delatte, Shen-en Chen, James Davidson, Anshuman Sehdev, Nader Amer, and Mark Endfinger, Design and Quality Control of Concrete Overlays, University Transportation Center for Alabama, Neal, B. F., California's Thin Bonded PCC Overlay, Report No. FHWA/CA/TL-83-04, Sacramento, California, June Reiner, E. J. Concrete Overlays Challenge Asphalt, Civil Engineering, pp 54 ~ Temple, W. H., and Cumbaa, S. L., Thin Bonded PCC Resurfacing, Louisiana Department of Transportation and Development, Report No. FHQA/LA-85/181, July VTRC 97-R9RB (Virginia Transportation Research Council), Evaluation of a Thin-Bonded Portland Cement Concrete Pavement Overlay, Willem A., Van Metzinger, B. Frank McCullough, David W. Fowler, An Empirical- Mechanistic Design Method using Bonded Concrete Overlays For The Rehabilitation of Pavements, CTR, 1991 Won, M., Continuously Reinforced Concrete Pavement (CRCP) in Texas: Performance & Experience , Portland Cement Concrete Pavement Conference, Yang H Huang, Pavement Analysis and Design, 2nd Edition 110

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Æ÷Àå½Ã¼³94š Cho, Mun Jin (E-mail: mjcho@ex.co.kr) ABSTRACT PURPOSES : The performance of tack coat, commonly used for layer interface bonding, is affected by application rate and curing time. In this study, bonding

³í¹® B-18š

³í¹® B-18š