Unveiling Synergistic Effects of Nano-Modification and CO2 Curing on the Durability of Precast Elements

Details

• Creators:
  Velay-Lizancos, Mirian ; Olek, Jan ; Tokpatayeva, Raikhan ; Edwards, Aniya
• Corporate Creators:
  Purdue University. Lyles Department of Civil Engineering
• Corporate Contributors:
  Transportation Infrastructure Precast Innovation Center (TRANS-IPIC) Tier-1 University Transportation Center (UTC) ; United States. Department of Transportation. University Transportation Centers (UTC) Program ; United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology
• Subject/TRT Terms:
  Calcium Chloride Carbonation Carbon Black Carbon Dioxide Cement Composite Materials Concrete Curing Corrosion Durability Early-Age Strength Infrastructure Mortar Precast Concrete Strength Development Strength Of Materials

  More +
• Publication/ Report Number:
  PU-23-RP-02
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Edition:
  Final Report: September 2023 – December 2025
• Corporate Publisher:
  Transportation Infrastructure Precast Innovation Center (TRANS-IPIC) Tier-1 University Transportation Center (UTC)
• Abstract:
  Many precast companies use heating during the curing process to accelerate early strength development and increase production volume without sacrificing durability, as early removal of the forms or transportation with insufficient strength can lead to macro-cracking or micro-cracking. This project has demonstrated that it is possible to reduce the curing time at high temperatures by half by combining CO2 curing with the addition of recovered carbon black. Thus, this approach can reduce energy consumption and increase precast production, potentially reducing the cost of precast infrastructure elements. Furthermore, when optimized, CO2 curing not only reduces the time to achieve the target early strength but also reduces porosity, a critical factor in enhancing durability. Results indicated that the combination of CO2 curing and nano-additive resulted in a reduction in the calcium hydroxide content, thus potentially reducing the risk of durability issues such as calcium oxychloride formation. Besides, the use of recovered carbon black can significantly reduce the hydrophilicity of the cementitious composites.
• Format:
  PDF
• Funding:
  69A3552348333
• Collection(s):
  University Transportation Centers
• Main Document Checksum:
  urn:sha-512:500a7abff7b2013a24c4c61c05bb15a201733dc956cfc3a3f796bb1c4b6efbd68a32d0500894ea75fe0226c57447ace59730d998282afc3c497bb8faa2a0cbb0
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/89202/dot_89202_DS1.pdf
• File Type:
  [PDF - 4.11 MB ]