【摘要】 青藏高原平均海拔4 000多米，海拔高、气压低、正负温交替天数多，冻融破坏是导致高原地区混凝土结构物性能劣化的最主要因素之一。文章对高原环境下引气混凝土的研究现状进行了分析，论述了低气压对引气剂溶液引气性能、混凝土含气量、孔结构与气孔结构的影响规律，提出了高原环境下提高混凝土抗冻耐久性的相关措施。更多还原

【Abstract】 The Qinghai-Tibet Plateau, with an average altitude exceeding 4,000 meters, is characterized by its high elevation, low atmospheric pressure, and frequent freeze-thaw cycles. Freeze-thaw damage is one of the primary factors leading to the deterioration of concrete structures in this high-altitude region. This paper reviews the current research on air-entrained concrete in plateau environments, examining the impact of low atmospheric pressure on the performance of air-entraining agents, air content, pore structure, air-void structure in concrete. It also proposes measures to enhance the freeze-thaw durability of concrete under plateau conditions.更多还原