To accurately analyze the temperature and relative humidity (RH) distribution in concrete structures under ambient conditions, based on Krstulovic-Dabic hydration kinetics, an improved hydration model is proposed to geometrically bridge the relationship between hydration degree and microstructure of cementitious materials. Both the water content and hydration heat can be individually extracted from the model to evaluate the influence of ambient conditions variation. And the adsorption curve of concrete is acquired based on the microstructure obtained from hydration model and a redistribution of moisture content in pores is applied to evaluate the hydration process accordingly. Thus, the coupling effect of RH and temperature diffusion in concrete is decoupled in terms of hydration degree. An engineering verification indicates that the model can accurately predict the development of relative and temperature in concrete structures, and the construction procedure has significant influence on moisture and heat diffusion in concrete under ambient conditions.

为了准确地分析环境条件下混凝土结构的温度和相对湿度（RH）分布，基于Krstulovic-Dabic水化动力学，提出了一种改进的水化模型，以几何方式桥接水化程度与胶凝材料微观结构之间的关系。可以从模型中单独提取水含量和水化热，以评估环境条件变化的影响。根据水化模型得到的微观结构，获得了混凝土的吸附曲线，并对孔隙中的水分含量进行了重新分配，从而评价了水化过程。因此，RH和混凝土中温度扩散的耦合作用就水合度而言是分离的。