Constructability of Concrete Materials Infused With Silica-Rich Biochar For Bridge Applications

Biochar additions to concrete binder have shown great promise for enhancing the early-age performance of material for bridge applications, including its hardening rate and strength development. Biochar is a waste product of the pyrolysis of organic material (wood, rice husks, corn husks, manure, or other agricultural waste products). Depending on the source, biochar is highly porous, with specific surface areas of ~300 m2/g, porosities up to 50 %, and pore sizes down to several nanometers. With high ash content biochar is pozzolanically active. It also may promote self-healing of the material via secondary mineralization involving dissolved alkali earths such as calcium. In cement, milled fast-pyrolysis char has been used at up to 32 % replacement by mass with improved compressive strengths due to its role as an internal curing source and nucleating agent for calcium silicate hydrate gel (C-S-H). The objective is to advance the TRL of biochar-infused concrete materials for implementation in bridge construction and repair. The approach to achieve that objective will be to determine the robustness of the material by investigating a wider range of w/c ratios, biochar dosages, and curing conditions for their effects on several important concrete properties, including the initial and final setting times, compressive strengths at 7 d, 28 d, and 90 d, and the secondary mineral formation extent at 7 d, 28 d, and 90 d.

• Record URL:
  • https://abc-utc.fiu.edu/constructability-of-concrete-materials-infused-with-silica-rich-biochar-for-bridge-applications/

Language

• English

Project

• Status: Active
• Funding: $67,900.00
• Contract Numbers:

  69A3552348322

• Sponsor Organizations:

  Innovative Bridge Technologies/Accelerated Bridge Construction University Transportation Center (IBT/ABC-UTC)

  Florida International University
  Miami, FL  United States 

  Office of the Assistant Secretary for Research and Technology

  University Transportation Centers Program
  Department of Transportation
  Washington, DC  United States  20590
• Performing Organizations:

  Texas A&M University, College Station

  Zachry Department of Civil Engineering
  3136 TAMU
  College Station, TX  United States  77843-3136
• Principal Investigators:

  Bullard, Jeffrey W

• Start Date: 20250101
• Expected Completion Date: 0
• Actual Completion Date: 0
• USDOT Program: University Transportation Centers Program

Subject/Index Terms

• TRT Terms: Admixtures; Binder content; Bridge construction; Compressive strength; Waste products (Materials)
• Subject Areas: Bridges and other structures; Construction; Highways; Materials;

Filing Info

• Accession Number: 01973315
• Record Type: Research project
• Source Agency: Innovative Bridge Technologies/Accelerated Bridge Construction University Transportation Center (IBT/ABC-UTC)
• Contract Numbers: 69A3552348322
• Files: UTC, RIP
• Created Date: Dec 2 2025 4:36PM