PUMPED CONCRETE AND PUMPING OF CONCRETE

PUMPBETONG OCH BETONGPUMPNING

The purpose of this investigation has been to: (1) grade the pumpability of concrete according to various compositions of the concrete mix, (2) specify a tolerance zone of pumpability for different types of pump and fields of use, (3) measure changes in the concrete due to concrete mix, pump type and conditions of use during pumping. It was found that the concrete consistency after pumping was stiffer than before and that compressive strength and shrinkage had not been changed. For the concrete mix used, maximum particle size of 16 mm and fines content 80 kilograms/cubic metre, the lowest pumping pressure was observed at a cement content of 320 kilograms/cubic metre. A lower pumpability limit was obtained at a cement content of 250 kilograms/cubic metre. No upper limit was observed. An increase of coarse aggregate required an increase in pumping pressure. An upper limit of pumpability was reached instantaneously. Total fine quantity was connected with the effect of cement content. A plastic concrete consistency required an increase in pumping pressure, but a change in consistency from fluid to semifluid required only a slight increase. As a result of the investigation a method of determining the pumping pressure has been evolved. The report includes an English summary of 8 pages. /TRRL/

• Corporate Authors:

  Cement and Concrete Research Institute

  Drottning Kristinas Vaeg 26
  Stockholm 70,   Sweden 
• Authors:
  • JOHANSSON, A
  • TUUTTI, K
• Publication Date: 1976

Language

• Swedish

Media Info

• Features: Figures; Photos; References;
• Pagination: 125 p.

Subject/Index Terms

• TRT Terms: Aggregates; Cement; Coarse aggregates; Compressibility; Compressive strength; Concrete; Consistency; Grain size (Geology); Mix design; Particles; Pressure; Pumped concrete; Pumps; Shrinkage; Strength of materials; Tolerances (Engineering); Workability
• Old TRIS Terms: Tolerances
• ITRD Terms: 4577: Aggregate; 4758: Cement; 5905: Compressibility; 4755: Concrete; 4714: Mix design; 4511: Particle; 5412: Pressure; 5544: Strength (mater); 5941: Workability
• Subject Areas: Construction; Geotechnology; Highways; Materials; Planning and Forecasting; I32: Concrete; I50: Construction and Supervision of Construction; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00163960
• Record Type: Publication
• Source Agency: Swedish National Road and Transport Research Institute (VTI)
• Report/Paper Numbers: Report No. 10 Monog Ser.
• Files: ITRD, TRIS
• Created Date: Dec 8 1977 12:00AM