| Title |
Life-Cycle CO2 Assessment of Precast Reinforced Concrete Hollow Columns Using Low-Carbon Concrete Mixtures |
| Authors |
정필준(Jeong, Pil-Jun) ; 양근혁(Yang, Keun-Hyeok) ; 김형근(Kim, Hyung-Geun) |
| DOI |
https://doi.org/10.5659/JAIK.2026.42.8.317 |
| Keywords |
Life-Cycle Assessment; CO; Performance Evaluation Table; Precast Concrete; Hollow Column; Low-Carbon Concrete |
| Abstract |
This study quantitatively evaluates life-cycle CO2 emissions of precast concrete hollow (PC-H) columns and compares them with those of
conventional reinforced concrete (RC) columns and solid precast concrete (PC) columns. To reduce CO2 emissions, a low-carbon precast
concrete mixture is developed, incorporating 70 percent supplementary cementitious materials (SCMs) and 30 percent cement. The mixture is
designed to achieve both early-age and long-term compressive strengths comparable to conventional precast concrete while satisfying precast
production requirements. A life-cycle assessment (LCA), conducted in accordance with ISO 14040, is applied with a system boundary that
includes material production, transportation, concrete manufacturing, and construction. Life-cycle CO2 emissions are compared across column
types and SCM replacement ratios under the same design compressive strength. The results show that the PC-H column produced with the
low-carbon concrete mixture reduces life-cycle CO2 emissions by 41.5 percent compared with RC columns and by 43.2 percent compared
with PC columns. Overall, when combined with the low-carbon concrete mixture, PC-H columns significantly reduce life-cycle CO2
emissions, while the hollow section configuration also contributes to reducing construction waste and shortening construction time. |