01033787

Component

http://www.trb.org/Publications/Blurbs/156750.aspx

This paper offers a brief history of evolution of vibratory rollers for use on hot-mix asphalt (HMA) compaction applications. Primary topics discussed include rolling patterns to achieve uniform pavement density and smoothness with attention to determining the ability of the vibratory breakdown roller to keep up with the paving spread. The growth of interest in HF (high frequency) vibratory rollers is analyzed, with explanation of the benefits of high vibration frequency to agency, contractor, and motoring public. Drum impact spacing is presented as one of the primary factors to achieve smoothness of HMA pavements, with mention of the relationship of drum dimensions and weight as related to roller design. Also presented is practical information on the effect of drum amplitude in the compaction process and how variable amplitude can add versatility to double drum vibratory roller performance. The importance of rolling within the proper temperature during the TAC (time available for compaction) is presented. Current innovations of machine automation are noted, as well as planned future developments that will provide value to agency and contractor alike. The importance of operator safety equipment in noted. The paper concludes with a look into the future of vibratory compactors.

01033774

English

pp 36-48

2006-9

Transportation Research Circular

Print

Figures (5) ; Photos (1) ; Tables (2)

Automation; Compactors; Density; High frequency; History; Hot mix asphalt; Road rollers; Safety equipment; Smoothness; Technological innovations; Temperature; Vibratory compaction

Vibratory rollers

Highways; History; Maintenance and Preservation; Materials; Safety and Human Factors; Vehicles and Equipment; I31: Bituminous Binders and Materials; I61: Equipment and Maintenance Methods

TRIS, TRB

Sep 27 2006 9:19PM

• Basics of Longitudinal Joint Compaction
• Compaction of Stiff and Tender Asphalt Concrete Mixes
• Constructing Longitudinal Joints with Lower Voids
• Construction of Durable Longitudinal Joints
• Field Testing of the Zero-Shear Viscosity Method
• Fundamentals of Percent Within Limits and Quality Control–Quality Assurance Compaction Specifications
• Impact of Incentives on In-Place Air Voids
• Measurement of Longitudinal Joint Density in Asphalt Pavements Using Nuclear and Nonnuclear Gauges
• Oscillatory Compaction of Hot-Mix Asphalt
• Percent Within Limits Experience on a Design–Build Project
• Prediction of Compaction Temperatures Using Binder Rheology
• State-of-the-Practice for Cold-Weather Compaction of Hot-Mix Asphalt Pavements
• Vibratory Pneumatic Tire Roller