01333095

Component

Over the years, the Indiana Department of Transportation (INDOT) has changed its emphasis from construction to preservation of public highways. As such, there is great interest in assessing cost efficacy of a pavement preservation strategy. This paper aims to present the functional and structural benefits of microsurfacing applications at highway sections in Indiana. To achieve this goal, comprehensive monitoring and data analysis was performed using the Pavement Condition Rating (PCR), Structure Number (SN), and surface roughness (IRI) for in-situ performance evaluation. According to the deflection and roughness analysis, an improvement was observed in SN and IRI during the early life of the pavement. Furthermore, no significant difference was obtained over the following two years. Application of the microsurfacing resulted in a significant rise in PCR, SN and decline in IRI. A similar result was found at the resurfacing site. Pavement with microsurface sections had stable roughness with only a two point increase every year. The two control sections (SR-68 and SR-145) have had four point increases on average. The IRI for SR-58 resurfacing was 48 in. /mile at 2009 (after construction), which is almost half of the 2008 (before construction) IRI value. The rates of decline of the SN, IRI were no different statistically for untreated control sections, and the rate of decline of the PCR was slightly higher than in the pavement preservation project, including resurfacing and microsurfacing. The cost study indicated that microsurfacing would be deemed cost effective if it could provide more than 1.6 years more service life, and resurfacing would be cost effective if it could provide more than 3 years more service life. Considering cost as well as performance, pavement preservation should be an effective strategy to eliminate or retard damage. If applied properly, microsurfacing is an economical alternative to conventional resurfacing. The case study results demonstrate that microsurfacing is a cost-effectiveness treatment in addressing pavement distresses and in extending pavement life in general.

01329018

11-2006

English

18p

2011

Transportation Research Board 90th Annual Meeting

DVD

Figures (6) ; Maps (1) ; References (9) ; Tables (2)

Case studies; Condition surveys; Pavement distress; Pavement maintenance; Roughness

Microsurfacing (Surface treating); Pavement preservation

Indiana

Highways; Maintenance and Preservation; Pavements; I61: Equipment and Maintenance Methods

Transportation Research Board Annual Meeting 2011 Paper #11-2006

TRIS, TRB

Feb 17 2011 6:01PM