Influence of Internal Curing on Concrete’s Permeability in Simulated Field Conditions [Summary]

Details

• Creators:
  Liu, Zhen
• Corporate Creators:
  Louisiana Transportation Research Center
• Corporate Contributors:
  Louisiana. Department of Transportation and Development
• Subject/TRT Terms:
  Concrete Curing Electrical Resistivity Field Tests Permeability
• Publication/ Report Number:
  LTRC Report 708
• Resource Type:
  Brief
• Geographical Coverage:
  United States
• Edition:
  Technical Summary
• Contracting Officer:
  Cooper, Samuel B III
• Corporate Publisher:
  Louisiana Transportation Research Center
• Abstract:
  The curing conditions stated in the AASHTO T358 standard require that concrete specimens remain fully saturated at all times in a moist room or cabinet prior to testing. These curing conditions obscure the true impact of internal curing. In order to assess the benefits of internal curing under more realistic condition, this study compared internally cured concrete’s properties under the 100% relative humidity (RH) moist room curing condition for 28 days with its properties under a hybrid curing condition, which consists of 100% RH moist room curing for the first 7 days followed by a lab environment for the next 21 days. It was found that the hybrid curing condition produced a higher compressive strength than the 100% RH moist room curing condition, with the exceptions of the mixtures 50TI/50S/0ICA (w/cm of 0.35) and 50TI/50S/250ICA (w/cm of 0.45). The application of saturated fine internal curing aggregates (ICAs) reduced the compressive strength magnitude variation between the two different curing conditions. At the age of 56 days, the mixtures with ICAs had either equal or higher surface resistivity than those without ICAs for the hybrid curing condition.
• Format:
  PDF
• Funding:
  SIO No. DOTLT1000422 LTRC Project No. 22-1C ; SPR: TT-Fed/TT-Reg - 6
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:f4ab02b87ddda2be64f4f4d0c9448efee25a7197048dd16321e6df5c2c323e0377267c66bc23d3ccf1c5eaf36d8b35313fbaf787b869e7c919790d35bc6cfa0a
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/82644/dot_82644_DS1.pdf
• File Type:
  [PDF - 205.83 KB ]