Oddo Maria Concetta, Cavaleri Liborio, La Mendola Lidia, Bilal Hassan
Department of Engineering, University of Palermo, 90128 Palermo, Italy.
Materials (Basel). 2024 Jul 10;17(14):3408. doi: 10.3390/ma17143408.
Plastic waste management has received significant attention in recent decades due to the urgent global environmental crisis caused by plastic pollution. The versatile and durable nature of plastic has led to its widespread usage across various sectors. However, its nonbiodegradable nature contributes to unsustainable production practices, leading to extensive landfill usage and posing threats to marine ecosystems and the food chain. To address these environmental concerns, numerous challenges have been recently addressed through investigating alternative approaches for disposing of plastic waste, with the construction sector emerging as a promising option. Incorporating plastic waste materials into concrete not only offers economic benefits but also provides a valid alternative to conventional disposal methods. This paper presents the results of different experimental studies, some of them available in the literature and others new, discussing the feasibility of integrating plastic waste into concrete and its impact on mechanical properties. The influence of different sizes, natures, treatments, and percentages of plastic waste in the concrete mixtures is dealt with in order to provide further data for helping to understand the nonunivocal results in the literature, under the conviction that only further observations can help to understand the mechanics of concrete with plastic aggregates. The experimental investigation highlighted that one parameter that is better than others and can be considered to compare different experimental investigations is the variation in weight (due to the effective volume of plastics in the mix), determining a sort of increasing of porosity that degrades the mechanical characteristics. However, this seems inconsistent in some cases. Therefore, the need for further research is highlighted to refine production methods and optimize mix designs.
近几十年来，由于塑料污染引发的全球环境危机迫在眉睫，塑料垃圾管理受到了广泛关注。塑料具有多功能且耐用的特性，这导致其在各个领域得到广泛应用。然而，其不可生物降解的性质导致了不可持续的生产方式，致使大量垃圾填埋，并对海洋生态系统和食物链构成威胁。为解决这些环境问题，近期通过研究处理塑料垃圾的替代方法应对了诸多挑战，建筑行业成为一个有前景的选择。将塑料废料掺入混凝土不仅具有经济效益，还为传统处置方法提供了有效的替代方案。本文展示了不同实验研究的结果，其中一些来自文献，另一些是新的，讨论了将塑料废料掺入混凝土的可行性及其对力学性能的影响。探讨了混凝土混合料中不同尺寸、性质、处理方式和塑料废料百分比的影响，以便提供更多数据，帮助理解文献中不一致的结果，因为相信只有进一步观察才能有助于理解含塑料骨料混凝土的力学原理。实验研究表明，一个比其他参数更优且可用于比较不同实验研究的参数是重量变化（由于混合料中塑料的有效体积），这会导致孔隙率增加，从而降低力学性能。然而，在某些情况下这似乎并不一致。因此，强调了进一步研究以改进生产方法和优化混合料设计的必要性。
