Yanshuai Wang , Jinmei Chen , Haobo Ren , Yuanyuan Zhang , Shuxian Hong , Biqin Dong , Guohao Fang
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引用次数: 0
摘要
利用核壳结构概念设计了一种新型的基于固体废弃物的人工骨料，有望在力学性能和自愈能力之间实现良好的协同作用。该人工骨料具有高自愈合潜力的核心和高强度的外壳，以实现人工骨料在混凝土中的高性能应用。对人工骨料的基本性能和潜在自愈能力进行了全面分析。结果表明，考虑到人工骨料的 28 d 单颗粒抗压强度超过 5.0 MPa、低吸水性和高体积稳定性，人工骨料是合格的。在模拟混凝土孔隙溶液（即饱和 Ca(OH)2 溶液）中养护 7 d 后，人工骨料的裂缝愈合率高达 94.5%。由于核心材料的二次水化反应，检测到的主要自愈合产物为水合铝酸钙-硅酸盐（C-A-S-H）凝胶。
Design and characterization of solid waste based self-healing artificial aggregate
A novel type of solid waste based artificial aggregate which holds promise for a good synergy between mechanical properties and self-healing capacity is designed with using the core-shell structure concept. The artificial aggregate is designed with a high self-healing potential core and a high strength shell, to achieve the high-performance application of artificial aggregates in concrete. The basic properties and potential self-healing capacity of artificial aggregates were comprehensively analyzed. The results indicated that the artificial aggregates were eligible considering the 28-d single particle compressive strength of exceeding 5.0 MPa, low water absorption and high volumetric stability. The crack-healing ratio of artificial aggregate is up to 94.5 % after 7-d curing in the simulated concrete pore solution (i.e., saturated Ca(OH)2 solution). The primary self-healing product was detected as calcium-aluminate-silicate-hydrate (C-A-S-H) gel due to the secondary hydration reactions of core materials.
期刊介绍：
Case Studies in Construction Materials provides a forum for the rapid publication of short, structured Case Studies on construction materials. In addition, the journal also publishes related Short Communications, Full length research article and Comprehensive review papers (by invitation).
The journal will provide an essential compendium of case studies for practicing engineers, designers, researchers and other practitioners who are interested in all aspects construction materials. The journal will publish new and novel case studies, but will also provide a forum for the publication of high quality descriptions of classic construction material problems and solutions.
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