Economical concrete mix design utilizing blended cements, performance-based specifications, and pay factors.

Details

• Creators:
  Bakhshi, Mehdi ; Laungrungrong, Busaba ; Bonakdar, Aboozar ; Mobasher, Barzin ; Borror, Connie M. ; Montgomery, Douglas C.
• Corporate Creators:
  Arizona State University. Fulton School of Engineering
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  Admixtures Blended Cement Concrete Curing Durability Fiber Reinforced Concrete Mix Design Performance Based Specifications
• Publication/ Report Number:
  FHWA-AZ-13-633
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  Arizona. Dept. of Transportation
• NTL Classification:
  NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance ; NTL-HIGHWAY/ROAD TRANSPORTATION-Design
• Abstract:
  This report showcases several new approaches of using materials science and structural mechanics to accomplish
  
  sustainable design of concrete materials. The topics addressed include blended cements, fiber-reinforced concrete
  
  (FRC), internal curing with lightweight aggregate, and statistical process control (SPC). Materials,
  
  methodologies, and test methods to enhance the performance and durability of concrete are addressed. Properties
  
  of pozzolans, blended cements, fly ashes, and other materials, along with proposed categories of highperformance
  
  concrete (HPC) mixtures using high-volume fly ash are briefly described. Early-age cracking and
  
  drying shrinkage are addressed in detail, as they both reduce load-carrying capacity and accelerate deterioration,
  
  resulting in increased maintenance costs and reduced service life. New developments in HPC materials using
  
  FRC are proposed, and it is shown that considerable cost savings can be realized by using fiber concrete
  
  mixtures.
  
  Internal curing techniques as a means of improving the quality of concrete using pre-soaked lightweight
  
  aggregate as an internal water supply were studied. The superior results of internally cured samples with
  
  lightweight aggregates, especially sintered bottom ash, indicate a great potential for using them in hot-weather
  
  concreting or when external curing is not possible.
  
  A new method for statistical data processing of concrete strength data also is presented. Technical tools were
  
  developed to improve performance-based specifications and statistical process control methods using cumulative
  
  sum (CUSUM) and exponentially weighted moving average (EWMA). Both of these approaches allow for
  
  process control and quality control (QC) monitoring of the materials. This report concludes with specifications
  
  for quality assurance (QA) and introduces quality measures as criteria for reducing the costs.
  
  
• Format:
  PDF
• Funding:
  SPR-PL1 (181) 633
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:f5b223e19045ca1822fd2a1cf3dd4400399149b6d854531a91eb2c805fa9352c
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/25944/dot_25944_DS1.pdf
• File Type:
  [PDF - 6.38 MB ]