In this study, the fracture toughness KIC of HPC was determined by conducting three-point bending tests on eighty notched HPC beams of 500×100×100 mm at high temperatures up to 450ºC (hot) and in cooled-down states (cold). When the concrete beams exposed to high temperatures for 16 hours, both thermal and hygric equilibriums were achieved. KIC for the hot concrete sustained a monotonic decrease tendency with the increasing temperature, with a sudden drop at 105ºC. For the cold concrete, KIC sustained a two-stage decrease trend, dropping slowly with the heating temperature up to 150ºC and rapidly thereafter.
|Title of host publication||2013 International Conference on Computational Technologies in Concrete Structures (CTCS13)|
|Place of Publication||South Korea|
|Number of pages||20|
|Publication status||Published - Sep 2013|
- fracture toughness