Optimization of Portland Limestone Cement Concrete Mixture for Rigid Pavement with Low Paste Volume and Blended Aggregates

With an increasing cement price comes a higher initial cost of rigid pavement. One of the solutions to address this issue is minimizing cementitious paste volume (CPV) of the concrete mix. This paper presents the results of a recent research in which portland limestone cement (PLC) concrete mixtures with CPV reduction and blended aggregated (BA) technique for Florida rigid pavement were evaluated. The findings of this study indicate that reducing CPV in the concrete mix would not affect the properties of PLC pavement concrete; the minimum CPV of PLC concrete mixes can be reduced to 22.5% with no loss in the properties of fresh and hardened concrete. The benefits of CPV reduction include low permeability and shrinkage strain. These characteristics could improve the durability of the PLC pavement concrete. Applying BA technique can improve the workability of the fresh concrete. Applying BA technique in concrete would not affect the strength and electrical resistance of hardened concrete; in addition, the concrete with BA technique, which provides a better packing density for concrete, can lead to a reduction of drying shrinkage. According to AASHTO empirical design equation of rigid pavement, concrete with BA technique can reduce around 10 mm of designed thickness of rigid pavement. In summary, minimizing CPV and BA technique can be considered to design sustainable PLC pavement concrete mixes with better pavement performance, lower materials costs, and lower global warming potential.

• Record URL:
  https://annualmeeting.mytrb.org/OnlineProgram/Details/15888
• Supplemental Notes:
  • This paper was sponsored by TRB committee AKM60 Standing Committee on Properties of Concrete and Constituent Materials.
• Corporate Authors:

  Transportation Research Board

  ,    
• Authors:
  • Chung, Hung-Wen
  • Tia, Mang
  • Upshaw, Patrick
  • Armenteros, Jose
  • DeFord, Harvey
• Conference:
  • Transportation Research Board 100th Annual Meeting
  • Location: Washington DC, United States
  • Date: 2021-1-5 to 2021-1-29
• Date: 2021

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: 23p

Subject/Index Terms

• TRT Terms: Admixtures; Aggregates; Cement paste; Concrete pavements; Limestone; Mix design; Optimization; Pavement performance; Portland cement concrete; Rigid pavements
• Geographic Terms: Florida
• Subject Areas: Design; Highways; Materials; Pavements;

Filing Info

• Accession Number: 01763449
• Record Type: Publication
• Report/Paper Numbers: TRBAM-21-00081
• Files: TRIS, TRB, ATRI
• Created Date: Feb 4 2021 10:54AM