Internal curing of high performance concrete using lightweight aggregates and other techniques.

Details

• Creators:
  Jones, Wesley A. ; House, Mitch W. ; Weiss, W. Jason
• Corporate Creators:
  Purdue University. School of Civil Engineering
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • High performance concrete
  • Concrete curing
  • Lightweight aggregates
  • Freeze thaw durability
  • Admixtures
  • Mix design
• Publication/ Report Number:
  CDOT-2014-3
• Resource Type:
  Tech Report
• Geographical Coverage:
  Colorado
• Corporate Publisher:
  Colorado. Dept. of Transportation. Research Branch
• Abstract:
  Internally cured concrete has been rapidly emerging over the last decade as an effective way to improve the ; performance of concrete. Internal curing (IC) holds promise for producing concrete with an increased ; resistance to early-age cracking and enhanced durability (Bentz and Weiss, 2011). IC is a simple and effective ; way to cure concrete. Proper internal curing supplies water that is necessary to relieve stress buildup due to ; self-desiccation. Typically this is done using pre-wetted lightweight aggregates (LWAs), as this is the most ; commercially available application at the present time. IC has shown reduced autogenous and drying shrinkage ; cracking, improved fluid absorption resistance, improved compressive strength, and reduced ion diffusion. It is ; becoming increasingly clear that internal curing has great potential for the concrete industry to create a longer ; lasting, more sustainable product. ; This report specifically examines the freeze-thaw resistance of internally cured concrete. It is shown that ; internally cured concrete, using the recommended mixture proportions (i.e., pre-wetted fine LWAs to replace ; only the water lost due to chemical shrinkage) is freeze-thaw resistant. ; Implementation ; Internal curing has shown, as outlined in this report, to be a simple and cost-effective way to create longer ; lasting, more durable concrete. The initial cost of a bridge deck concrete can increase in price anywhere from 3 ; to 10 $/yd3. However, this percentage when compared with the cost of bridge is typically negligible, especially ; when considering an increased service live and reduced maintenance cost. CDOT can benefit from this ; research by applying what has been presented in this study to create longer lasting, more durable bridge decks.
  More +
• Format:
  PDF
• Funding:
  22.6
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27099/dot_27099_DS1.pdf
• File Type:
  [PDF - 3.18 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:c960687cb4c418f7d8bc0f9129fed8b548cd60e636ae574537f1e28ed9972c59