Journal of the Korea Institute of Building Construction (한국건축시공학회지)

The Korean Institute of Building Construction (한국건축시공학회)
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Physical Properties of 50MPa and 80MPa Ternary High Strength Concretes before and after Concrete Pumping

  • Lee, Bum-Sik (Construction Technology Reserch Dept., Land & Housing Institute) ;
  • Kim, Seong-Deok (Dept. of Architectural Engineering. Dankook University Graduate School) ;
  • Jun, Myoung-Hoon (Construction Technology Reserch Dept., Land & Housing Institute) ;
  • Park, Sung-Sik (Construction Technology Reserch Dept., Land & Housing Institute) ;
  • Park, Su-Hee (Machinery, Metals & Construction Team, Korea Institute of Patent Information) ;
  • Jung, Sang-Jin (Dept. of Architectural Engineering. Dankook University Graduate School)
  • Received : 2011.09.08
  • Accepted : 2012.05.21
  • Published : 2012.08.20
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Abstract

At the Korea Land and Housing Corporation(LH), concretes with high design strength of 50 MPa and 80 MPa that are composed only of ordinary Portland cement, blast furnace slag, and fly ash are developed. To determine whether the developed high strength concretes have the same properties when they are produced in batch plant(B/P) condition in the ready mixed concrete plant, and as existing high strength concretes, field tests are performed and material properties are evaluated. To investigate the material properties of the high strength concretes before and after pumping, compressive strength, flowability, air content, hydration temperature, pumping and compactability are evaluated. In field tests, before and after pumping, flowability satisfied the relevant criteria. In terms of air content, while it was slightly decreased after pumping, it satisfied the requirements. Hydration temperature criteria were satisfied, and compactability was excellent as well. The study found that the developed ternary high strength concretes have the same properties as existing high strength concretes. They can also be useful for the construction of high-rise buildings, as they are economical.

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References

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