Cardoso Rafaela, Silva Rui Vasco, Brito Jorge de, Dhir Ravindra
ICIST, CERIS, Department of Civil Engineering, Architecture and Georresources, Instituto Superior Técnico, University of Lisbon, Av. Rovisco Pais, 1, 1049-001 Lisbon, Portugal.
ICIST, CERIS, Department of Civil Engineering, Architecture and Georresources, Instituto Superior Técnico, University of Lisbon, Av. Rovisco Pais, 1, 1049-001 Lisbon, Portugal.
Waste Manag. 2016 Mar;49:131-145. doi: 10.1016/j.wasman.2015.12.021. Epub 2015 Dec 31.
The use of recycled aggregates (RA) in construction constitutes a significant step towards a more sustainable society and also creates a new market opportunity to be exploited. In recent years, several case-studies have emerged in which RA were used in Geotechnical applications, such as filling materials and in unbound pavement layers. This paper presents a review of the most important physical properties of different types of RA and their comparison with natural aggregates (NA), and how these properties affect their hydraulic and mechanical behaviour when compacted. Specifically, the effects of compaction on grading size distribution curves and density are analysed, as well as the consequences of particle crushing on the resilient modulus, CBR and permeability. The paper also contains an analysis of the influence of incorporating different RA types on the performance of unbound road pavement layers as compared with those built with NA by means of the International Roughness Index and deflection values. The results collected from the literature indicate that the performance of most RA is comparable to that of NA and can be used in unbound pavement layers or in other applications requiring compaction.
在建筑中使用再生骨料（RA）是迈向更可持续社会的重要一步，同时也创造了一个有待开发的新市场机会。近年来，出现了一些案例研究，其中再生骨料被用于岩土工程应用，如填充材料和无结合料路面层。本文综述了不同类型再生骨料的最重要物理特性，并将其与天然骨料（NA）进行比较，以及这些特性在压实后如何影响其水力和力学行为。具体而言，分析了压实对级配尺寸分布曲线和密度的影响，以及颗粒破碎对回弹模量、加州承载比（CBR）和渗透性的影响。本文还通过国际平整度指数和弯沉值，分析了与使用天然骨料建造的路面层相比，掺入不同类型再生骨料对无结合料路面层性能的影响。从文献中收集的结果表明，大多数再生骨料的性能与天然骨料相当，可用于无结合料路面层或其他需要压实的应用中。
