Computers and Concrete

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Mechanical properties and adiabatic temperature rise of low heat concrete using ternary blended cement

  • Kim, Si-Jun (Department of Plant Architectural Engineering, Kyonggi University) ;
  • Yang, Keun-Hyeok (Department of Plant Architectural Engineering, Kyonggi University) ;
  • Lee, Kyung-Ho (Department of Architectural Engineering, Kyonggi University) ;
  • Yi, Seong-Tae (Department of Civil & Environmental Engineering, Inha Technical College)
  • Received : 2015.10.07
  • Accepted : 2015.11.28
  • Published : 2016.02.25
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Abstract

This study examined the mechanical properties and adiabatic temperature rise of low-heat concrete developed based on ternary blended cement using ASTM type IV (LHC) cement, ground fly ash (GFA) and limestone powder (LSP). To enhance reactivity of fly ash, especially at an early age, the grassy membrane was scratched through the additional vibrator milling process. The targeted 28-day strength of concrete was selected to be 42 MPa for application to high-strength mass concrete including nuclear plant structures. The concrete mixes prepared were cured under the isothermal conditions of $5^{\circ}C$, $20^{\circ}C$, and $40^{\circ}C$. Most concrete specimens gained a relatively high strength exceeding 10 MPa at an early age, achieving the targeted 28-day strength. All concrete specimens had higher moduli of elasticity and rupture than the predictions using ACI 318-11 equations, regardless of the curing temperature. The peak temperature rise and the ascending rate of the adiabatic temperature curve measured from the prepared concrete mixes were lower by 12% and 32%, respectively, in average than those of the control specimen made using 80% ordinary Portland cement and 20% conventional fly ash.

Keywords

Acknowledgement

Supported by : Korea Institute of Energy Technology Evaluation and Planning (KETEP)

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