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齐齐哈尔百货大楼混凝土框架在一九八六年冬季进行施工,前后分两个阶段进行。第一阶段是从一九八六年十月二十日至十一月十五日,这一期间,是齐齐哈尔的初冬阶段,温度一般在-10℃至-20℃左右,这一阶段的施工方法是采用新型外加剂,主要解决目标是保证混凝土标号,降低工程造价。第二阶段是十一月十六日至十二月三十日,这一期间是齐齐哈尔严寒阶段,温度多在-30℃左右。这一阶段采用了电热布养生法,目标是加快混凝土硬化,保证混凝土标号,缩短工期,降低工程造价。通过两个过程施
The concrete framework of Qiqihar Department Store was constructed in the winter of 1986 and was carried out in two stages. The first stage is from October 20th to November 15th, 1986. This period is the early winter period of Qiqihar. The temperature is generally around -10°C to -20°C. The method is the use of new additives, the main solution is to ensure that the concrete marking, reduce the project cost. The second stage is from November 16 to December 30. This period is the cold period of Qiqihar. The temperature is about -30°C. This stage adopted the electric cloth heat preservation method, the goal is to speed up the concrete hardening, guarantee the concrete marking, shorten the construction period, reduce the construction cost. Through two processes