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:
  Admixtures Concrete Curing Freeze Thaw Durability High Performance Concrete Lightweight Aggregates 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.
  
  
• Format:
  PDF
• Funding:
  22.6
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:c960687cb4c418f7d8bc0f9129fed8b548cd60e636ae574537f1e28ed9972c59
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27099/dot_27099_DS1.pdf
• File Type:
  [PDF - 3.18 MB ]