Abstract
Measurements of the International Roughness Index (IRI) were conducted on eight pavement sections, corresponding to two highways and one airport runway, constructed in the period 1995-1999 in Argentina. All three pavements were built using slip-form pavers. Different sections of the pavements were built by different contractors, using different logistics and machinery. The IRI was measured using an Inertial Profilometer T6500 K.J. Law, corresponding to Class 1 according to ASTM E 950-98. The results obtained in the different sections vary widely according to the technology applied in each of them. The average IRI of the sections ranged from values near 4 m/km to values below 2 m/km. Linking the IRI values registered in each section with the technology applied in them, showed that the best results were obtained where appropriate logistics (e.g. higher concrete production rates) and the use of heavy pavers (CMI, GOMACO and Wirtgen) were employed. Another important conclusion is that the IRI values obtained decreased chronologically, reflecting the importance of experience and know-how transfer from one job to the next. The main conclusion of this study is that, with modern and powerful pavers, appropriate logistics of concrete production and delivery, and personnel, trained and experienced at all levels, is possible nowadays to build in Argentina concrete roads of evenness comparable to that of high-quality asphalt roads.Measurements of the International Roughness Index (IRI) were conducted on eight pavement sections, corresponding to two highways and one airport runway, constructed in the period 1995-1999 in Argentina. All three pavements were built using slip-form pavers. Different sections of the pavements were built by different contractors, using different logistics and machinery. The IRI was measured using an Inertial Profilometer T6500 K.J. Law, corresponding to Class 1 according to ASTM E 950-98. The results obtained in the different sections vary widely according to the technology applied in each of them. The average IRI of the sections ranged from values near 4 m/km to values below 2 m/km. Linking the IRI values registered in each section with the technology applied in them, showed that the best results were obtained where appropriate logistics (e.g. higher concrete production rates) and the use of heavy pavers (CMI, GOMACO and Wirtgen) were employed. Another important conclusion is that the IRI values obtained decreased chronologically, reflecting the importance of experience and know-how transfer from one job to the next. The main conclusion of this study is that, with modern and powerful pavers, appropriate logistics of concrete production and delivery, and personnel, trained and experienced at all levels, is possible nowadays to build in Argentina concrete roads of evenness comparable to that of high-quality asphalt roads.
Published Version
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