Shear Behavior of Plastic Roller-Compacted Concrete

Roller-compacted concrete (RCC) pavements require high-density pavers to distribute, densify, and provide the initial finish. High-density pavers coupled with appropriately proportioned RCC mixture volumetrics should reduce the compactive effort necessary to meet density specifications and increase productivity. Additionally, chemical admixtures may also assist in improving compactability and productivity. The primary test employed for fresh RCC workability is the Vebe test, which is primarily a quality control and consistency test. In this study, the direct shear box apparatus measured the shear properties of RCC mortar mixtures in the plastic state. Multiple RCC mortar mixtures with different paste contents and a rheology-modifying admixture (RMA) were evaluated. Direct shear box tests on the compacted RCC mortar samples using an RMA indicated no significant impact on the friction angle for a given maximum aggregate size. The RCC mixture volumetrics, such as intragranular voids, paste volume, and voids filled by paste, predominantly influenced the apparent cohesion when voids in the aggregate were either underfilled or overfilled. Higher apparent cohesion was generated from negative pore-water pressure built-up from relatively high strain rates and restricted drainage. The RMA did not affect the peak or residual friction angle of the compacted RCC.

• Record URL:
  https://doi.org/10.1061/9780784483510.003
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784483510
• Supplemental Notes:
  • © 2021 American Society of Civil Engineers.
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Ouellet, Jordan
  • Roesler, Jeffery R
• Conference:
  • International Airfield and Highway Pavements Conference 2021
  • Date: 2021-6-8 to 2021-6-10
• Publication Date: 2021

Language

• English

Media Info

• Pagination: pp 23 - 33
• Monograph Title: Airfield and Highway Pavements 2021: Pavement Materials and Sustainability

Subject/Index Terms

• TRT Terms: Admixtures; Cohesion; Compactibility; Concrete plastic composites; High density; Pavers; Quality control; Rheological properties; Roller compacted concrete pavements; Shear properties; Volumetric analysis
• Subject Areas: Aviation; Highways; Materials; Pavements;

Filing Info

• Accession Number: 01775825
• Record Type: Publication
• ISBN: 9780784483510
• Files: TRIS, ASCE
• Created Date: Jun 30 2021 5:37PM