PCC Material Characterization in Mississippi for AASHTOWare Pavement ME Design

This paper presents guidelines developed by Mississippi Department of Transportation (MDOT) for characterizing portland cement concrete (PCC) materials for AASHTOWare Pavement ME designs. The guidelines, developed under MDOT’s ongoing efforts to implement the Mechanistic Empirical Pavement Design Guide (MEPDG) procedure Pavement ME program, are based on laboratory results from of 20 PCC mixes batched with materials typical of Mississippi paving mixes. They include five different aggregate sources and four different options for the use of supplementary cementitious materials (SCM) for partial cement replacement. The laboratory experimental plan comprised of standard tests to measure flexural strength, compressive strength, elastic modulus, poisson’s ratio, coefficient of thermal expansion (CTE), and percent length change due to shrinkage. The laboratory test results represent level 1 and 2 PCC material inputs and they were recorded at different test ages as required by the MEPDG procedure. Strength and modulus data were measured at 7, 14, 28, and 90 days, CTE at 28-days, and shrinkage length change measurements at 1, 7, 14, 21, 35, 63, 119, 231, and 455 days. The data collected offered an excellent opportunity to validate and refine the MEPDG recommended level 2 models for estimating flexural strength and elastic modulus based on compressive strength data. The data demonstrate a slight deviation from the national models. Level 2 equations were developed by aggregate type. Also, CTE values based on aggregate type were established for these material sources. AASHTOWare ME analysis verified the benefit of using MDOT level 2 correlations over the default correlations to match performance predictions with analysis using level 1 inputs. It is recommended that future efforts by MDOT for the recalibration of the rigid pavement distress prediction models examine the sensitivity of these level 2 correlation equations prior to their inclusion in the MDOT Design Manual.

• Supplemental Notes:
  • This paper was sponsored by TRB committee AFN20 Standing Committee on Properties of Concrete. Alternate title: PCC Material Characterization in Mississippi for AASHTOWare Pavement Mechanistic-Empirical Design.
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Rao, Chetana
  • Varner, Robert
  • Barstis, William
• Conference:
  • Transportation Research Board 95th Annual Meeting
  • Location: Washington DC, United States
  • Date: 2016-1-10 to 2016-1-14
• Date: 2016

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: 28p
• Monograph Title: TRB 95th Annual Meeting Compendium of Papers

Subject/Index Terms

• TRT Terms: Compressive strength; Mechanistic-empirical pavement design; Paving; Portland cement concrete
• Identifier Terms: AASHTOWare (Software)
• Geographic Terms: Mississippi
• Subject Areas: Design; Highways; Materials;

Filing Info

• Accession Number: 01594652
• Record Type: Publication
• Report/Paper Numbers: 16-6962
• Files: TRIS, TRB, ATRI
• Created Date: Mar 29 2016 9:35AM