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:
  • Blended cement
  • Fiber reinforced concrete
  • Concrete curing
  • Admixtures
  • Mix design
  • Durability
  • 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.
  More +
• Format:
  PDF
• Funding:
  SPR-PL1 (181) 633
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/25944/dot_25944_DS1.pdf
• File Type:
  [PDF - 6.38 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:ea5c82749445c6c2151d4dd01c155fd25242792de366585e7e9b117bbb036f99b836b2b0c9e833c33a0e6a68ff97d37a2c2e847d19529b137cbceeab06908a74