长期以来,加气混凝土主要用来保证寒冷地区水工、海工混凝土的抗冻性。近年来,随着对冬季施工混凝土试验研究工作的不断深入,国外已经提出在冬季施工混凝土中也必须掺入加气剂,以提高新浇筑混凝土的早期防冻能力和长期耐久性,国内也开始注意到冬季施 For a long time, aerated concrete is mainly used to ensure the freezing resistance of hydraulic and marine concrete in cold regions. In recent years, with the continuous deepening of experimental research on winter construction concrete, it has been proposed in foreign countries that concrete must be blended with air-entraining agents in winter in order to improve the early antifreeze ability and long-term durability of newly cast concrete. To winter