| Title |
Estimation and Analysis of Changes in Regional Cold Weather Concreting Periods Following the Revision of the Korea Construction Standards |
| Authors |
이강산(Lee, Gang-San) ; 한민철(Han, Min-Cheol) |
| DOI |
https://doi.org/10.5659/JAIK.2026.42.10.429 |
| Keywords |
Cold Weather Concreting; Estimation of Application Period; Daily Temperature Criteria; Climate Data Analysis |
| Abstract |
In this paper, the periods of cold weather concreting in South Korea are re-evaluated in accordance with the 2022 revision of the Korea
Construction Standards (KCS 14 20 40). The previous specification determined the cold weather concreting period solely based on a daily
average temperature of 4°C or lower. However, the revised standard introduced an additional requirement mandating cold weather measures
when the daily minimum temperature is expected to fall below 0°C within 24 hours after placement, even if the daily average temperature
exceeds 4°C. To investigate the implications of this revision, historical climate data from the Korea Meteorological Administration were
analyzed for 64 regions nationwide. Cold weather concreting periods were estimated using three criteria: daily average temperature condition,
daily minimum temperature condition, and the combined condition reflecting the revised KCS, with the application period defined as the
interval between the earliest and latest dates satisfying each criterion. Furthermore, statistical reference periods of 30, 10, and 5 years were
compared to evaluate their suitability for regional prediction. The results indicate that incorporating the daily minimum temperature criterion
significantly extends the application period, particularly during transitional seasons in late autumn and early spring. The estimated application
periods did not vary significantly among the statistical reference periods. However, the 30-year reference period showed smaller variability
and greater consistency with previous studies, whereas the 5-year reference period exhibited larger variability. The findings provide
quantitative evidence of the impact of the revised standard and offer a rational basis for determining appropriate reference periods and
improving construction planning and cold weather concreting management under strengthened cold weather concreting requirements. |