Best practices for concrete pumping.

Details

• Creators:
  Riding, Kyle A ; Vosahlik, Jan ; Feys, Dimitri ; Malone, Travis R ; Lindquist, Will
• Corporate Creators:
  Kansas State University. Transportation Center
• Corporate Contributors:
  Kansas. Dept. of Transportation. Bureau of Research
• Subject/TRT Terms:
  • Concrete mixing
  • Pumping (Pavements)
  • Rheological properties
  • Samples
  • Air voids Concrete pumping
  • pumpability
  • concrete properties
  • air void system
• Publication/ Report Number:
  K-TRAN: KSU-14-2
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States;Kansas
• Edition:
  Final report
• Corporate Publisher:
  Kansas. Dept. of Transportation
• Description:
  Pumping is one of the major placement techniques used in the concrete industry to deliver concrete
  
  from the mixing truck to the formwork. Although concrete pumping has been used to place concrete since
  
  the 1960s, there is still a lack of exact knowledge supported by research evidence as to what affects concrete
  
  pumpability and how pumping changes concrete properties. A three-phase research study was carried out to
  
  (1) investigate performance of pumped concrete in field conditions, (2) identify concrete properties affecting
  
  pumpability, and (3) assess the effects of pumping on the concrete air void system. In the first phase of the
  
  research program, six Kansas Department of Transportation (KDOT) project sites were visited during the
  
  summer of 2015, and concrete was sampled before and after pumping. In addition to measuring fresh
  
  concrete properties as well as performing hardened air void analysis of all sampled mixtures, rheological and
  
  tribological tests were performed on sampled concrete. The second phase of the study consisted of a fullscale
  
  controlled pumping experiment. During the experiment, three different concrete mixtures were
  
  pumped, and both fresh and hardened properties of the concrete were determined. Additionally, the pumping
  
  system was equipped with strain gauges to measure pumping pressures. Finally, the third phase of the study
  
  consisted of measuring the rheological and tribological properties of 35 concrete mixtures in order to
  
  determine the effect of various concrete components on pumpability.
• Format:
  PDF
• Funding:
  C1995
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/31647/dot_31647_DS1.pdf
• File Type:
  [PDF - 1.30 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:986c0c8c1c9dcb081fc69d14fda2a412659e019518a63fa5dd211c8158e3db48e6876bc46aa4f6cf2314a997eabf6ff215d7e82cf52482204d1d23912ed18821