For concrete subjected to restrained conditions, autogenous deformation (AD) and thermal dilation (TD) are the main driving forces behind stress development in the hardening phase. Generally, AD in concrete is modelled by model codes or measured in the laboratory under 20 °C isothermal conditions, and then used as basis for stress calculations under realistic temperature conditions. To evaluate this common simplification, the current study investigated the effect of curing temperature on the AD of a series of fly ash concretes. A comprehensive test program was performed for fly ash concretes subjected to various temperature curing conditions. The model codes and measurements under 20 °C isothermal conditions provided AD developments in the same order of magnitude. However, when subjected to a realistic temperature history during curing, major changes in the AD developments were observed, emphasising that AD must be determined under relevant temperature conditions.

对于受约束条件的混凝土，自生变形（AD）和热膨胀（TD）是硬化阶段应力发展的主要驱动力。通常，混凝土中的AD通过模型代码建模或在实验室中20°C等温条件下进行测量，然后用作实际温度条件下应力计算的基础。为了评估这种常见的简化，当前的研究调查了固化温度对一系列粉煤灰混凝土的AD的影响。对在不同温度固化条件下的粉煤灰混凝土进行了全面的测试。在20°C等温条件下的模型代码和测量结果提供了相同数量级的AD发展。但是，在固化过程中经历实际的温度历史记录时，