Properties of Concrete and Structural Performance of Actual Members Obtained from an Existing RC Building of Extremely Low Strength Concrete
By K. Sadasue, E. Sakamoto and H. Araki
Concrete Journal, Vol.63, No.11, Nov. 2025
- Synopsis
- Existing buildings constructed with low-strength concrete, which has poor seismic performance, should ideally be demolished. However, due to economic reasons or cultural value, it may be preferable to reinforce them and continue their use. In such cases, it is important to investigate the causes of low strength of the concrete and its mechanical properties. In this study, concrete specimens as well as actual structural members such as columns and beams were obtained from a building slated for demolition due to its low seismic performance, primarily attributed to extremely low strength concrete, and the performance of the materials and structural members of the actual structure was investigated.
- Keywords:
- Extremely low strength concrete, Seismic evaluation, Actual member, Mix proportion estimation, Carbonation, Bond strength, Ultimate strength
