汾河二库坝址处于寒冷地区，每年负温持续时间较长，为保证工期，需要采用一定时间的冬季施工，但冬季施工因施工仓面大不易保温，且碾压混凝土强度增长慢而早期抗冻性差，放需采取低温施工技术措施．根据寒冷季节混凝土膨胀机理和常态混凝土中应用防冻剂比较成熟的经验，决定 The Fenhe second reservoir dam site is in a cold area. The negative temperature duration lasts a long time each year. In order to ensure the construction period, a certain time of winter construction is required. However, the winter construction is not easy to be insulated due to the construction warehouse surface and the RCC strength increases slowly and early Frost resistance is poor, put to take low-temperature construction techniques and measures. According to the cold season concrete expansion mechanism and the normal concrete application of antifreeze more mature experience, decided