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Properties of concrete with eggshell powder: A review
Physics and Chemistry of the Earth, Parts A/B/C ( IF 3.0 ) Pub Date : 2020-10-26 , DOI: 10.1016/j.pce.2020.102951
B.W. Chong , R. Othman , P.J. Ramadhansyah , S.I. Doh , Xiaofeng Li

Sustainable concrete is currently a widely studied topic in order to reduce the environmental impact of cement. Substitute materials are usually industrial and municipal wastes. Eggshell powder as cement replacement is a viable option to produce green concrete. At the same time, it improves the disposal of eggshell, which is thrown away as household waste and mostly ends up in the landfill. This paper reviews the constituents, production techniques and properties of eggshell concrete (ESC). The paper presents the chemical compound of eggshell and the suitability of the waste as cement replacement. This is followed by a discussion of the fresh, hardened and durability properties based on a variety of previous studies. At the optimal content of 10%, ESC has various advantages compared to conventional concrete. The advantages are associated with the high calcium content and good filling effect of eggshell powder. This includes improved hardened properties, reduced setting time, and increased resistance to water penetration and carbonation. Eggshell is also an accelerator to the hydration process. However, ESC shows weakness in chloride and sulphate environment due to the vulnerability of eggshell to these compounds. While studies on the material are available significantly, researches on durability properties of ESC should be enhanced.



中文翻译:

蛋壳粉混凝土的性能研究进展

可持续混凝土目前是减少水泥对环境影响的广泛研究课题。替代材料通常是工业和市政废物。蛋壳粉替代水泥是生产绿色混凝土的可行选择。同时,它改善了蛋壳的处置方式,这种蛋壳被当作生活垃圾扔掉了,大部分最终都被填埋了。本文综述了蛋壳混凝土(ESC)的成分,生产技术和性能。本文介绍了蛋壳的化学成分以及废物作为水泥替代品的适用性。在此之前,根据之前的各种研究,对新鲜,硬化和耐用性进行了讨论。ESC的最佳含量为10%,与常规混凝土相比具有各种优势。这些优点与蛋壳粉的高钙含量和良好的填充效果有关。这包括改善的硬化性能,减少的凝固时间以及增加的耐水渗透性和抗碳化性。蛋壳也是水合过程的促进剂。然而,由于蛋壳对这些化合物的脆弱性,ESC在氯化物和硫酸盐环境中显示出弱点。尽管对这种材料的研究非常广泛,但应加强对ESC耐久性能的研究。由于蛋壳对这些化合物的脆弱性,ESC在氯化物和硫酸盐环境中显示出弱点。尽管对这种材料的研究非常广泛,但应加强对ESC耐久性能的研究。由于蛋壳对这些化合物的脆弱性,ESC在氯化物和硫酸盐环境中显示出弱点。尽管对这种材料的研究非常广泛,但应加强对ESC耐久性能的研究。

更新日期:2020-12-09
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