Zero-stress temperature (ZST), defined as an inelastic indicator for the behavior of concrete elements in early-age, is one of the critical factors affecting the behavior and performance of concrete pavements. However, available and reliable methods for selecting this parameter are still limited. In this paper, a numerical approach to predict ZST in concrete pavement slabs was proposed. A one-dimensional (1D) finite-difference method to predict the temperature distribution in a hardening concrete slab was developed. To calculate the early-age stress in concrete slab subjected to the environmental loads, a two-dimensional (2D) finite-element analysis was also developed. The results of the temperature prediction obtained from the 1D finite-difference method were used and incorporated in the calculating of the early-age concrete stress to establish ZST. The results of ZST obtained from the proposed numerical model showed a good agreement compared with the field experiments. Using the proposed model, the sensitivity analysis of the ZST showed that the construction seasons, concrete placement times, concrete mix proportions, and pavement thicknesses have significant effects on ZST. The proposed numerical model is helpful and useful to predict ZST in concrete pavement slabs for given environmental conditions, concrete placement time, concrete mixture, and slab geometry.

零应力温度（ZST）被定义为早期混凝土元素行为的非弹性指标，是影响混凝土路面性能和性能的关键因素之一。但是，选择此参数的可用和可靠方法仍然受到限制。本文提出了一种数值方法来预测混凝土路面的ZST。开发了一种预测硬化混凝土板中温度分布的一维（1D）有限差分方法。为了计算混凝土板在环境载荷下的早期应力，还开发了二维（2D）有限元分析。使用从一维有限差分法获得的温度预测结果，并将其结合到早期混凝土应力的计算中以建立ZST。从提出的数值模型获得的ZST结果与现场实验相比显示出良好的一致性。使用所提出的模型，对ZST的敏感性分析表明，施工季节，混凝土浇筑时间，混凝土配合比和路面厚度对ZST有显着影响。对于给定的环境条件，混凝土浇筑时间，混凝土混合物和板的几何形状，所提出的数值模型对于预测混凝土路面板的ZST是有用的和有用的。ZST的敏感性分析表明，施工季节，混凝土放置时间，混凝土配合比和路面厚度对ZST有显着影响。对于给定的环境条件，混凝土浇筑时间，混凝土混合物和板的几何形状，所提出的数值模型对于预测混凝土路面板的ZST是有用的和有用的。ZST的敏感性分析表明，施工季节，混凝土放置时间，混凝土配合比和路面厚度对ZST有显着影响。在给定的环境条件，混凝土浇筑时间，混凝土混合物和板的几何形状的条件下，所提出的数值模型对于预测混凝土路面板的ZST是有帮助和有用的。