EPISODE · Nov 9, 2025 · 30 MIN
443. 混凝土的致命弱点：时间
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该文章是一篇名为《混凝土最大的弱点——实用工程》的节选，主要讨论了混凝土作为建筑材料的独特挑战，尤其是其强度增长需要时间的特性。文章首先通过1973年天际线广场大厦倒塌事件的案例，强调了过早拆除支撑对未充分固化混凝土的危险。随后，它详细介绍了混凝土硬化的两个关键阶段（可塑性和强度）以及水化过程，并解释了28天强度基准的重要性。最后，文章探讨了在实际施工中，等待混凝土达到设计强度所带来的瓶颈效应和如何加速固化，同时强调了时间是混凝土最主要的弱点，因为它需要一个漫长的固化期才能进行全面测试和承重。内容来源：https://practical.engineering/blog/2025/11/4/concretes-greatest-weakness
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443. 混凝土的致命弱点：时间
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