Unveiling synergistic effects of Nano-modification and CO2 curing on the durability and carbon footprint of precast elements

Carbon dioxide (CO2) curing of concrete, a process well-suited for precast operations, increases the strength and reduces the porosity while lowering carbon footprint in two ways: (1) directly through carbonation and (2) by reducing the amount of cement required to achieve target performance. The addition of nano-TiO2 to cementitious composites was also shown to reduce porosity and increase the strength of cementitious composites. Furthermore, previous studies showed that the combination of both nano-TiO2 addition and CO2 curing can increase the CO2 uptake and further reduce the porosity. However, the combined effect of both CO2 curing and nano-TiO2 addition on the transport properties was not studied, and nano-TiO2 is expensive; thus, this project aims to elucidate the combined effects of CO2 curing and nano-modification with respect to porosity, transport properties, and strength. This will enable the production of more durable, sustainable, and economical precast elements.

Language

• English

Project

• Status: Active
• Sponsor Organizations:

  University of Illinois, Urbana-Champaign

  Department of Civil and Environmental Engineering
  Newmark Civil Engineering Laboratory
  Urbana, IL  United States  61801-2352

  Office of the Assistant Secretary for Research and Technology

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

  Purdue University

  1040 South River Road
  West Lafayette, IN  United States  47907
• Principal Investigators:

  Velay-Lizancos, Mirian

  Olek, Jan

  Tokpatayeva, Raikhan

• Start Date: 20230901
• Expected Completion Date: 20240831
• Actual Completion Date: 0
• USDOT Program: University Transportation Centers

Subject/Index Terms

• TRT Terms: Carbon dioxide; Compressive strength; Concrete curing; Nanostructured materials; Porosity; Precast concrete
• Subject Areas: Construction; Highways; Materials;

Filing Info

• Accession Number: 01893428
• Record Type: Research project
• Source Agency: Transportation Infrastructure Precast Innovation Center
• Files: UTC, RIP
• Created Date: Sep 18 2023 10:15PM