Zhang Yingda, Liu Xinyue, Xu Ziyi, Yuan Weiguang, Xu Yong, Yao Zuobang, Liu Zihao, Si Ruizhe
School of Architecture and Civil Engineering, Xihua University, Chengdu 610039, China.
Institute of Civil Engineering Materials, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China.
Materials (Basel). 2024 May 12;17(10):2288. doi: 10.3390/ma17102288.
Supplementary cementitious materials (SCMs) are eco-friendly cementitious materials that can partially replace ordinary Portland cement (OPC). The occurrence of early-age cracking in OPC-SCM blended cement is a significant factor impacting the mechanical properties and durability of the concrete. This article presents a comprehensive review of the existing research on cracking in OPC-SCM concrete mix at early ages. To assess the effects of SCMs on the early-age cracking of concrete, the properties of blended cement-based concrete, in terms of its viscoelastic behavior, evolution of mechanical performance, and factors that affect the risk of cracking in concrete at early ages, are reviewed. The use of SCMs in OPC-SCM concrete mix can be an effective method for mitigating early-age cracking while improving the properties and durability of concrete structures. Previous research showed that the shrinkage and creep of OPC-SCM concrete mix are lower than those of conventional concrete. Moreover, the lower cement content of OPC-SCM concrete mix resulted in a better resistance to thermal cracking. Proper selection, proportioning, and implementation of SCMs in concrete can help to optimize the performance and reduce the environmental impact of OPC-SCM concrete mix.
辅助胶凝材料（SCMs）是可部分替代普通硅酸盐水泥（OPC）的环保型胶凝材料。OPC-SCM混合水泥中早期裂缝的出现是影响混凝土力学性能和耐久性的重要因素。本文对OPC-SCM混凝土拌合物早期裂缝的现有研究进行了全面综述。为评估SCMs对混凝土早期裂缝的影响，从其粘弹性行为、力学性能演变以及影响混凝土早期开裂风险的因素等方面，对混合水泥基混凝土的性能进行了综述。在OPC-SCM混凝土拌合物中使用SCMs可以是减轻早期裂缝同时改善混凝土结构性能和耐久性的有效方法。先前的研究表明，OPC-SCM混凝土拌合物的收缩和徐变低于传统混凝土。此外，OPC-SCM混凝土拌合物中水泥含量较低使其具有更好的抗热裂性能。在混凝土中正确选择、配比和使用SCMs有助于优化性能并降低OPC-SCM混凝土拌合物的环境影响。
