County, Iowa.

Details

• Creators:
  Taylor, Peter C. ; Hosteng, Travis K. ; Wang, Xuhao ; Phares, Brent M.
• Corporate Creators:
  Iowa State University. National Concrete Pavement Technology Center ; Iowa State University. Bridge Engineering Center
• Corporate Contributors:
  Iowa. Highway Research Board ; Iowa. Dept. of Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Concrete curing
  • Bridges
  • Bridge decks
  • Concrete mixing
  • Lightweight aggregates
  • Shrinkage concrete bridge decks
  • concrete mix design
  • field performance
  • internal curing
  • laboratory testing
  More +
• Publication/ Report Number:
  IHRB Project TR-648;InTrans Project 12-434
• Resource Type:
  Tech Report
• Geographical Coverage:
  Iowa
• Corporate Publisher:
  Iowa State University. Bridge Engineering Center
• Abstract:
  Internal curing is a relatively new technique being used to promote hydration of portland cement concretes. The fundamental concept is ; to provide reservoirs of water within the matrix such that the water does not increase the initial water/cementitious materials ratio to the ; mixture, but is available to help continue hydration once the system starts to dry out. The reservoirs used in the US are typically in the ; form of lightweight fine aggregate (LWFA) that is saturated prior to batching. ; Considerable work has been conducted both in the laboratory and in the field to confirm that this approach is fundamentally sound and ; yet practical for construction purposes. A number of bridge decks have been successfully constructed around the US, including one in ; Iowa in 2013. ; It is reported that inclusion of about 20% to 30% LWFA will not only improve strength development and potential durability, but, more ; importantly, will significantly reduce shrinking, thus reducing cracking risk. The aim of this work was to investigate the feasibility of ; such an approach in a bridge deck. ; Peter Taylor, Travis Hosteng, Xuhao Wang, and Brent Phares (orcid.org/0000- ; 0002-4030-1727, orcid.org/0000-0002-2059-1296, orcid.org/0000-0002-0564- ; 1558, and orcid.org/0000-0001-5894-4774)
  More +
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/30835/dot_30835_DS1.bin
• File Type:
  [BIN - 3.53 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:b97f8236750e0ca49422047f09ee63d1b1758a5cce8baff5a13b0c154efd5969efd0f6122358f4c7cb7aeab477add4120139265f9b74db6c7cf492abebc7ffaa