01023124

Component

https://doi.org/10.3141/1967-17

http://scholar.google.com...tafa&publication_year=2006

Theoretical analysis supported by laboratory investigations and verified by field studies and observations has shown that defects caused by rolling compaction are the main contributors to early deterioration of asphalt surfaces. The conventional and widely used steel drum roller induces hairline cracks, which permit moisture to infiltrate pavement structure, causing the phenomenon known as stripping. In addition to inducing cracks, steel drums do not provide the desired uniformity in terms of density across the compacted width of the asphalt mat. Drummed rollers also produce poor compaction at unsupported edges of paved lanes. The asphalt multi-integrated roller (AMIR), an innovative compaction technology, offers a more effective alternative for overcoming problems of steel drum rollers by reducing permeability and, in turn, improving long-term performance of flexible pavements. A multistaged laboratory and field-testing program that measures permeability in terms of hydraulic conductivity was performed on pavement sections constructed using an AMIR side by side with a conventional steel roller. Asphalt concrete layers compacted by steel drum rollers were found, on average, to be up to 20 times more permeable than those compacted by the AMIR immediately after construction and as much as 10 times more permeable after 1 year. The major steps leading to the understanding of how rolling affects the permeability of asphalt layers and, consequently, the long-term performance of newly compacted pavements are discussed and presented.

01037970

English

pp 173-180

2006

Transportation Research Record: Journal of the Transportation Research Board

0309099765

Print

Figures (1) ; Photos (3) ; References (19) ; Tables (3)

Asphalt pavements; Compaction; Field tests; Flexible pavements; Laboratory tests; Pavement cracking; Pavement performance; Permeability; Road rollers; Stripping (Pavements); Technological innovations

Steel-drum rollers (Compactors)

Construction; Design; Highways; Maintenance and Preservation; Pavements; Vehicles and Equipment; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces; I52: Construction of Pavements and Surfacings; I61: Equipment and Maintenance Methods

PRP, TRIS, TRB, ATRI

Mar 3 2006 10:35AM

• Comparative Design Case Studies of Pavement Performance on Expansive Soils
• Design Model for Roughness and Serviceability of Pavements on Expansive Soils
• Duration of Spring Thaw Recovery for Aggregate-Surfaced Roads
• Effectiveness of Open-Graded Base Layer on Subgrade Moisture Regime and Overall Pavement Performance
• Estimating Thermal Conductivity of Pavement Granular Materials and Subgrade Soils
• Estimation of Expected Moisture Contents for Pavements by Environmental and Soil Characteristics
• Evaluation of Resilient Modulus Model Parameters for Mechanistic–Empirical Pavement Design
• Field Monitoring of Moisture Variations Under Flexible Pavement
• Hauling with Full Axle Weights and Reduced Tire Pressures on Weight-Restricted Roads in British Columbia
• Implementation of Spring Load Restrictions Using a Deflection-Calibrated Thaw Index
• Investigations of Environmental and Traffic Impacts on "Mechanistic-Empirical Pavement Design Guide" Predictions
• Laboratory Evaluation of Untreated and Treated Pavement Base Materials: Repeated Load Permanent Deformation Test
• Resilient Modulus Estimation System for Fine-Grained Soils
• Safety and Cost-Effectiveness of Approach Guardrail for Bridges on Low-Volume Roads
• Safety Effectiveness of Stop Control at Ultralow-Volume Unpaved Intersections
• Two-Dimensional Moisture Flow–Soil Deformation Model for Application to Pavement Design