UniSA STEM, University of South Australia, SA, 5000, Australia.
UniSA STEM, University of South Australia, SA, 5000, Australia.
Environ Res. 2022 Nov;214(Pt 4):113975. doi: 10.1016/j.envres.2022.113975. Epub 2022 Aug 19.
Self-healing concrete is an innovative construction material designed to repair its cracks autogenously or autonomously. The self-healing effect reduces the need for maintenance and increases the longevity of concrete structures, bringing environmental and economic benefits. However, the developed methods to improve self-healing performance, e.g., incorporating advanced techniques or expensive chemical healing agents, significantly increase the cost of concrete manufacture. There is worldwide interest in using waste materials to reduce the cost of self-healing concrete, and a significant amount of studies have been performed on this topic. A review of research on waste-derived self-healing concrete is presented in this paper. The wastes were used in both autogenous and autonomous self-healing approaches, such as mineral admixture, bacteria-based technology, and engineered cementitious composite; different environmental conditions may significantly influence self-healing efficiency due to different reaction mechanisms. In general, waste materials could be reused to manufacture self-healing concrete if adopting appropriate mix design and treatment methods. Self-healing concrete made with various industrial wastes is an efficient way to reduce the manufacturing cost and promote its application in practice.
自愈合混凝土是一种创新性的建筑材料，旨在自动或自主修复其裂缝。自愈合效果减少了对维护的需求，提高了混凝土结构的耐久性，带来了环境和经济效益。然而，为了提高自愈合性能而开发的方法，例如采用先进技术或昂贵的化学愈合剂，会显著增加混凝土制造的成本。世界范围内都有兴趣利用废物来降低自愈合混凝土的成本，并且已经对此进行了大量的研究。本文综述了基于废物的自愈合混凝土的研究。这些废物被用于自愈合和自主愈合方法，如矿物掺合料、基于细菌的技术和工程水泥基复合材料；由于不同的反应机制，不同的环境条件可能会显著影响自愈合效率。一般来说，如果采用适当的配合比设计和处理方法，废物材料可以被重新用于制造自愈合混凝土。使用各种工业废物制造的自愈合混凝土是降低制造成本并促进其在实际应用中的有效途径。
