1 / 16

2019 Pavement Workshop May 21-23, 2019

Join our workshop to explore research on enhancing pavement design by improving material inputs for RCA & RAP. Learn about data collection, sensitivity analyses, and future expectations in this interactive session.

colee
Download Presentation

2019 Pavement Workshop May 21-23, 2019

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 2019 Pavement WorkshopMay 21-23, 2019 Improve Material Inputs into Mechanistic Design Properties for RCA & RAP Bora Cetin Assistant Professor Iowa State University + 46 Associate Members

  2. RESEARCH TEAM Iowa State University • Principal Investigator – Bora Cetin Assistant Professor – Department of Civil, Construction & Environmental Engineering • Research Personnel – Patrick Bollinger PhD Student – Department of Civil, Construction & Environmental Engineering GeoEngineering Consulting, LLC • Co-Principal Investigator – Tuncer B. Edil President and Chief Engineer

  3. OUTLINE Introduction Research motivation Objectives Research plan Future expectations

  4. INTRODUCTION HMA/PCC/Granular Subgrade Base Course

  5. INTRODUCTION http://www.gratechcompanyltd.com/aggregate.htm • 2 billion tons/year aggregate produced (FWHA 2004) • 200 million tons/year of RCA and 90 million tons/year of RAP generated (FHWA 2011)

  6. INTRODUCTION Annual Quantity Used RAP RCA From Edil et al. (2012)

  7. INTRODUCTION Use of Material Characteristics Pavement M-E Design AASHTO 1993

  8. INTRODUCTION Range of Materials Reclaimed Asphalt Pavement Unbound Materials Fine-Grained Soils Recycled Concrete Aggregate Macadam Stabilized Soils

  9. OBJECTIVES

  10. RESEARCH PLAN Task 1– Initial memorandum on expected research benefits and potential implementation steps Task 2 – Data collection Task 3 – Sensitivity Analyses Task 4 – Draft/final report

  11. Task 2-Data Collection • Characterization of RAP & RCA • Stiffness/Resilient modulus (Mr) • Permanent deformation • Shear strength • Index properties • Hydraulic conductivity/permeability

  12. Task 3-Sensitivity Analyses Normalized Sensitivity Index (NSI) NSI ∆Y = the change in pavement performance due to change in design input DL = the design limit for the pavement performance parameter ∆X = the change in the design input from the baseline X X = the baseline design input value

  13. Task 3-Sensitivity Analyses IRI = Roughness LC = Longitudinal Cracking AC = Alligator Cracking AR = Asphalt Rutting TR = Total Rutting

  14. Task 4-Draft/Final Report

  15. SCHEDULE

  16. Thank You

More Related