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一九八六十二月中旬,我处在齐铁科研所的配合下,应用电热布养护工艺,成功地完成了处教育中心宿舍楼现浇钢筋混凝土井字梁的施工任务,为严寒条件下,混凝土的正温养护探求出一个新的办法。 一、方案选择 本工程混凝土量为13m~3,设计强度200级,梁断面分别为250×500mm和250×450mm,梁柱节点十处,表面系数12。查有关资料,届时最低气温在-20℃以下,如掺省推荐的WN—D抗冻早强剂已不适用。用蓄热法施工,因梁裸露半空中,很难实施予定保温效果,而且强度增长缓慢,满足不了
In mid-December 1986, under the cooperation of Qitie Institute of Science and Technology, I applied electric heating cloth maintenance technology and successfully completed the construction task of cast-in-situ concrete reinforced concrete beams in the dormitory building of the Education Center. A new method was found for the conservation of positive temperature in concrete. First, the program selection This project concrete volume is 13m~3, the design strength 200 grades, the beam section is 250*500mm and 250*450mm respectively, the beam column node is 10, the surface coefficient is 12. Check the relevant information, when the minimum temperature is below -20 °C, such as the introduction of the province recommended WN-D antifreeze early strength agent is not applicable. With the method of thermal storage, it is difficult to implement a predetermined thermal insulation effect due to bare exposed beams, and the strength increase is slow and cannot be satisfied.