Journal of the Architectural Institute of Korea (대한건축학회논문집)

Architectural Institute of Korea (대한건축학회)
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Mechanical Properties of Lightweight Aggregate Concrete Using Expanded Bottom Ash and Dredged Soil Granules

바텀애시 및 준설토 기반 인공 경량골재 콘크리트의 역학적 특성

  • Received : 2020.03.31
  • Accepted : 2021.01.22
  • Published : 2021.02.28
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Abstract

This study aims to examine the effect of water-to-cement ratios (W/C) on the mechanical properties of lightweight aggregate concrete (LWAC) prepared using artificially expanded bottom ash and dredged soil granules. For the all-LWAC and sand-LWAC (with sand content of 50% for replacing lightweight fine aggregates) groups, W/C varied from 30% to 50% at an interval of 5%. From the comparison of the normalized compressive strength development, a higher long-term strength ratios were observed in LWAC when compared with the common values of the conventional normal-weight concrete. The compressive strength, tensile strength, modulus of elasticity and rupture, shear friction strength, and bond strength with a reinforcing bar measured in sand-LWAC were higher by approximately 42%, 35%, 35%, 52%, 33%, and 3.5%, respectively, than those of the companion all-LWAC. The modulus of elasticity and rupture of LWAC could be estimated conservatively using the design equations specified in KBC 2016.

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References

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