The main objective of the study was to evaluate the durability of a crushed concrete aggregate, processed from construction and demolition waste and an inert siderurgical aggregate for construction, processed from electric arc furnace steel slag, with a view to boosting their re-cycling, minimizing the consumption of non-renewable natural resources and preserving the capacity of landfills. Both recycled aggregates were selected based on their high availability worldwide and to be generally associated with suitable engineering properties. However, in many cases, their acceptance by the end-users continues to be very low. One reason for continuing this distrust is the lack of knowledge about the durability of both materials. In natural aggregates, durability has been considered as an important mechanical property in the evaluation of their performance, but it has not been studied in recycled aggregates; so, slake durability tests were carried out. Their durability was compared with the behaviour of two reference natural aggregates, a basalt and a limestone. To complement the durability results obtained, macropetrographic and micropetrographic examinations as well as physical characterizations were performed. The results of the tests showed that, under the test conditions adopted, both recycled aggregates present durability which foresees their use in civil engineering applications.

该研究的主要目的是评估由建筑废料和拆除废料加工而成的压碎混凝土集料和由电弧炉钢渣加工而成的惰性建筑辅料的​​耐久性，以期促进其再循环，最大程度地减少消耗不可再生的自然资源并维护垃圾掩埋场的能力。两种回收骨料的选择均基于其在全球范围内的高可用性，并且通常与合适的工程特性相关联。但是，在许多情况下，最终用户对它们的接受程度仍然很低。继续这种不信任的原因之一是缺乏对两种材料的耐用性的了解。在天然骨料中 耐久性已被认为是评估其性能的重要机械性能，但尚未在再生骨料中进行研究；因此，进行了耐久试验。将其耐久性与两种参考天然骨料（玄武岩和石灰石）的行为进行了比较。为了补充获得的耐用性结果，进行了宏观金相和微观金相检查以及物理表征。测试结果表明，在采用的测试条件下，两种再生骨料均具有耐久性，预见它们将在土木工程应用中使用。为了补充获得的耐用性结果，进行了宏观金相和微观金相检查以及物理表征。测试结果表明，在采用的测试条件下，两种再生骨料均具有耐久性，预见它们将在土木工程应用中使用。为了补充获得的耐用性结果，进行了宏观金相和微观金相检查以及物理表征。测试结果表明，在采用的测试条件下，两种再生骨料均具有耐久性，预见它们将在土木工程应用中使用。