01124757

Component

Several interlayer systems have been used in conjunction with hot-mix asphalt (HMA) overlays in an effort to retard reflective cracking on Illinois highways. The performance of these interlayer systems depends on traffic and environmental conditions. Material costs and construction requirements are also different for each interlayer system. Thus, it is difficult to determine the most efficient interlayer system for a specific location. In this study, a benefit-cost (B-C) prediction model was developed as a simple criterion to select a cost-effective interlayer system. The B-C of three interlayer systems used in Illinois was obtained through life-cycle cost analysis (LCCA). The B-C prediction model was assumed to be a function of performance benefit ratio (PBR), material cost ratio (MCR), and construction time ratio (CTR), which can quantify the salient features of each interlayer system. The benefit-cost prediction model was validated using crack survey results obtained from field-based work. An application region was specified for the most suitable interlayer system in terms of traffic volume, low temperature, and joint spacing. An interlayer stress-absorbing composite (ISAC) was shown to be the most efficient method in cold regions given installation at appropriate spacing; a sand-mix interlayer system proved to be the most efficient in warm regions

01120148

09-3777

English

16p

2009

Transportation Research Board 88th Annual Meeting

DVD

Figures (6) ; References (9) ; Tables (2)

Benefit cost analysis; Cost effectiveness; Hot mix asphalt; Life cycle costing; Mix design; Pavement layers; Pavement management systems; Pavement performance

Fatigue life prediction; Reflective cracking; Stress absorbing interlayers

Illinois

Highways; Pavements; I22: Design of Pavements, Railways and Guideways

Transportation Research Board Annual Meeting 2009 Paper #09-3777

TRIS, TRB

Jan 30 2009 8:11PM