In this paper, the thermal cracking resistance of concrete mixtures made with different cement compositions under attack of the cold wave at early ages has been investigated using a temperature stress testing machine (TSTM). Two cements, named as low heat cement (LHC) and moderate heat cement (MHC), and three curing regimes (3d, 7d and 14d) were selected. Energy consumption, CO₂ emission, thermal cracking resistance, cracking stress, ultimate tensile strain and creep-shrinkage ratio of concrete were discussed. Results showed that compared with those of MHC, the energy consumption and CO₂ emission of LHC was reduced by 6.75% and 4.13%, respectively. At early ages, the mechanical properties of LHC concrete were generally weaker than those of MHC concrete, but with a stronger creep capability. Cracking temperature difference (the temperature variation during the rapid cooling phase) results indicated that before 7 days, the thermal cracking resistance of LHC concrete was approximately 15% weaker than that of MHC concrete, however, followed by a comparable level with that of MHC concrete at 14 days. An analytical method for evaluating the cracking temperature difference of concrete was proposed. It is recommended based on the results in the current research that stricter superficial thermal insulation after concrete casting should be carried out for at least 14 days provided that LHC is mixed.

在本文中，使用温度应力测试机（TSTM）研究了由不同水泥组成制成的混凝土混合物在早期的冷浪冲击下的抗热裂性。选择了两种水泥，分别称为低热水泥（LHC）和中热水泥（MHC），并选择了三种固化方式（3d，7d和14d）。讨论了混凝土的能耗，CO ₂排放，抗热裂性，裂化应力，极限拉伸应变和蠕变收缩率。结果表明，与MHC相比，能耗和CO ₂LHC的排放量分别减少了6.75％和4.13％。在早期，LHC混凝土的机械性能通常比MHC混凝土的机械性能弱，但具有更强的蠕变能力。开裂温度差（快速冷却阶段的温度变化）结果表明，在7天之前，LHC混凝土的抗热裂性比MHC混凝土低约15％，但随后的水平与MHC混凝土相当在14天。提出了一种评估混凝土开裂温差的分析方法。根据当前研究的结果，建议在混合LHC的情况下，在混凝土浇筑后至少要进行至少14天的表面保温。