Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Evaluation of Louisiana's Maintenance Chip Seal and Micro-Surfacing Program
This report focuses on valuation of Louisiana DOTD's chip seal and micro-surfacing treatments. The report discusses the performance in terms of Pavement Condition Index (PCI) of 40 chip seal and 24 micro-surface projects after approximately 52 months of service throughout the state. The evaluation is based on three separate subjective visual distress surveys and ARAN measured distress on cracking, roughness, and rutting. Sections vary in age from 41 months to 63 months. The analysis indicated that the median PCI (Pavement Condition Index) of chip seal and micro-surface sections is about 75 and 85, respectively, after about 52 to 60 months of service. Based on the last PCI, about 70 percent of the chip seals were in good condition. Likewise, most of the micro-surface sections are in good to excellent condition. The effect of pavement condition on PCI, prior to treatment application, was not evident from the distress data measured by ARAN equipment. Chip seal sections showed bleeding in 70 percent of the sections. This bleeding was due to combination of factors relative to loss of aggregate, additional embedment and/or excess asphalt. However, most skid numbers are still in the safe range. The friction numbers on micro-surface sections have deteriorated considerably mainly due to the type of aggregates used in the mix.
Evaluation of Louisiana's Maintenance Chip Seal and Micro-Surfacing Program
This report focuses on valuation of Louisiana DOTD's chip seal and micro-surfacing treatments. The report discusses the performance in terms of Pavement Condition Index (PCI) of 40 chip seal and 24 micro-surface projects after approximately 52 months of service throughout the state. The evaluation is based on three separate subjective visual distress surveys and ARAN measured distress on cracking, roughness, and rutting. Sections vary in age from 41 months to 63 months. The analysis indicated that the median PCI (Pavement Condition Index) of chip seal and micro-surface sections is about 75 and 85, respectively, after about 52 to 60 months of service. Based on the last PCI, about 70 percent of the chip seals were in good condition. Likewise, most of the micro-surface sections are in good to excellent condition. The effect of pavement condition on PCI, prior to treatment application, was not evident from the distress data measured by ARAN equipment. Chip seal sections showed bleeding in 70 percent of the sections. This bleeding was due to combination of factors relative to loss of aggregate, additional embedment and/or excess asphalt. However, most skid numbers are still in the safe range. The friction numbers on micro-surface sections have deteriorated considerably mainly due to the type of aggregates used in the mix.
Evaluation of Louisiana's Maintenance Chip Seal and Micro-Surfacing Program
S. C. Shah (Autor:in)
2002
126 pages
Report
Keine Angabe
Englisch
Construction Equipment, Materials, & Supplies , Highway Engineering , Transportation , Surface treatments , Preventive maintenance , Road surfaces , Road materials , Highway maintenance , Louisiana , Performance evaluation , Cracking , Roughness , Rutting , Chip seals , Micro-surfacing , Department of Transportation , Visual distress surveys , ARAN measured distress
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