Feasibility of Using Hand-Held Dynamic Cone Penetrometer for Analyzing Soft Subgrade Quickly

Details

• Creators:
  Islam, Md Rashadul ; Kalevela, Sylvester A.
• Corporate Creators:
  Colorado State University-Pueblo
• Corporate Contributors:
  Colorado. Department of Transportation. Applied Research & Innovations Branch ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  CBR Cone Penetrometers DCP Feasibility Analysis Mechanistic-empirical Pavement Design Penetrometers Plasticity Index R-value Soft Subgrade Soils Subgrade (Pavements) Tests For Suitability, Service And Quality

  More +
• Publication/ Report Number:
  CDOT 2019-05
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Colorado
• Edition:
  Final Report: January 2017 – December 2019
• Corporate Publisher:
  Colorado Department of Transportation. Applied Research & Innovations Branch
• Abstract:
  Colorado Department of Transportation (CDOT) does not have evidence how the Dynamic Cone Penetrometer (DCP) test results correlate to other test methods (say, R-value) for Colorado’s pavement subgrade. Even, the correlation between single-mass, and dual-mass DCP (which are two ways of conducting DCP test) is still unknown. Pavement Mechanistic-Empirical Design (PMED) guide provides some correlations among different subgrade tests. However, those correlations are derived from national data. Research was thus needed to investigate the correlation between single-mass, and dual-mass DCP, and determine correlations among other subgrade tests for Colorado’s pavement soils. Suitable test sites were found out from ongoing construction projects. Both single-mass, and dual-mass DCP, CBR, R-value, and Soil Classification testing were conducted. Results show that the single–mass DCP produces an average of 62% penetration compared to that of dual–mass DCP. The calculated R– values and CBR using the PMED equations and the developed equations are statistically equal at 95% confidence interval. The developed regression equations to calculate the R–value yield more accurate and statistically equal R–value compared to that by the PMED equations. The R–value calculated by PMED equation using the soil’s gradation, and plasticity index are less accurate compared to other methods. However, the R–value calculated by developed equation using the soil’s gradation, and plasticity index are the most accurate compared to other methods.
• Format:
  PDF
• Funding:
  417.03 ; SAP PO 411012017
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:dadd26a459adf1afb40e6c15ea8c82be06b6d658814da63fef7c6df040f8fc23fa9b15e729727d2670e6da50e55981688026076080be3e7ce9fe559d9fc66cf0
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/88641/dot_88641_DS1.pdf
• File Type:
  [PDF - 2.92 MB ]