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文章以混凝土早期性能与裂缝控制为题展开讨论。首先,对混凝土的早期性能进行了分析,主要包括混凝土的初期水化电特性、早期水化放热、早龄期的收缩与徐变,早期力学性能,以及混凝土的断裂性能。然后,通过对混凝土的早龄期性能进行分析,得出混凝土早期开裂机理。最后,建立相关的混凝土损伤模型,并在数值模拟的基础上,提出控制混凝土裂缝的办法与措施。
The article discusses the problem of early performance and crack control of concrete. First of all, the early performance of concrete is analyzed, including the initial hydration electrical properties of concrete, early hydration heat, early age shrinkage and creep, early mechanical properties, and the fracture properties of concrete. Then, through the analysis of the early age of concrete, the early cracking mechanism of concrete is obtained. Finally, the relevant concrete damage model is established, and on the basis of numerical simulation, the methods and measures for controlling concrete cracks are proposed.