The heat generated by the hydration reaction in early-age concrete leads to temperature field heterogeneity,potentially causing thermal cracks that affect the overall structural stability.This study adopts a mesoscopic perspective,treating concrete as a three-phase composite material comprising aggregate,cement paste,and the interfacial transition zone(ITZ).A two-dimensional random aggregate mesoscopic numerical model is developed to simulate the internal heat conduction process in concrete.The model comprehensively considers various environmental factors,including hydration heat,ambient temperature fluctuations,convective heat transfer,solar radiation,and cooling pipes.The finite element software based on ABAQUS is redeveloped to facilitate the temperature field simulation.The model's accuracy is validated by comparing it with the actual measurement data.In addition,it reveals the thermal resistance effect of ITZ on internal heat conduction in concrete.The present mesoscopic numerical model provides a novel perspective for accurately analyzing the temperature field distribution in concrete,offering valuable insights for early-age concrete temperature control measures.
关键词
混凝土/早龄期/水化热/温度场/细观/冷却水管
Key words
concrete/early age/hydration heat/temperature field/mesoscopic/cooling water pipes
维普
万方数据