01122032

Component

https://doi.org/10.3141/2116-01

http://scholar.google.com...lion&publication_year=2009

The concept of using a vibratory compactor as a tool for assessing construction quality by measuring the drum displacement with an accelerometer began decades ago. Initiated in Europe and correlated with plate bearing tests, this technology has advanced to “intelligent” compaction, in which feedback from the instrumentation can control the amplitude of vibration. With the national push to implement such methods in the United States, researchers at the Texas Transportation Institute sought to examine the relationship between the vibration amplitude of the roller drum and pavement layer properties on several Texas construction projects. Testing revealed that although the roller drum vibration amplitudes did relate to pavement layer properties, the correlation was with the stiffness of foundation layers, typically at least 12 in. below the surface. This finding presents at least one significant hurdle to implementing the instrumented–intelligent compaction concept: a change from density-based to stiffness-based specifications would be necessary. In addition, valid approaches to extracting properties of the surface layer are needed. The results from projects tested indicate that the most promising approaches to using this technology are for evaluating uniformity, compaction monitoring (determining when to stop rolling), and proof rolling. The proof rolling application requires validation to determine the depth of the weak spot.

01147419

09-1295

English

pp 1-7

2009

Transportation Research Record: Journal of the Transportation Research Board

9780309126311

Print

Figures (16) ; Photos (5) ; References (8)

Construction projects; Instrumentation; Pavement layers; Quality control; Road construction; Rollers; Stiffness; Vibratory compaction

Intelligent compaction

Texas

Construction; Highways; Vehicles and Equipment; I52: Construction of Pavements and Surfacings

TRIS, TRB, ATRI

Jan 30 2009 5:32PM

• Automation of Pavement Sublayer Moisture Content Determination Using Long-Term Pavement Performance Time Domain Reflectometry Data and Micromechanics
• Capacities and Deflections of Laterally Loaded Shafts Behind Mechanically Stabilized Earth Wall
• Comparison of Stress States and Paths: Vibratory Roller-Measured Soil Stiffness and Resilient Modulus Testing
• Deformation Factors of Buried Corrugated Structures
• Evaluation of High-Capacity Composite Spun Piles
• Evaluation of the Zone of Influence and Stiffness Improvement from Geogrid Reinforcement in Granular Materials
• Fatigue Evaluation of Porous Asphalt Composites with Carbon Fiber Reinforcement Polymer Grids
• Full-Scale Evaluation of Geosynthetic-Reinforced Aggregate Roads
• Geogrid Base Reinforcement with Aggregate Interlock and Modeling of Associated Stiffness Enhancement in Mechanistic Pavement Analysis
• High-Capacity Piles at the Stony Creek Bridge Project
• Horizontal Drains in a Clay–Landslide Stabilization Test Program
• North Carolina Department of Transportation’s Practice and Experience with Design–Build Contracts: Geotechnical Perspective
• Stiffness-Based Assessment of Pavement Foundation Materials Using Portable Tools