In Cuba, tons of construction and demolition waste (CDW) are generated during urban construction and reconstruction activities every year. The use of CDW, such as recycled concrete aggregates (RCA) and reclaimed asphalt pavement (RAP), in pavement construction is a viable solution to preserve the consumption of natural aggregates (NA), and to minimize the impact of landfill. The main objective of this work is to obtain a 5–10 mm aggregate fraction of RCA and RAP, to obtain an appropriate recycled coarse aggregate for manufacturing hot mix asphalt (HMA). Each source of RCA, RAP and NA, and the combinations RCA/RAP (0/100, 25/75, 50/50, 75/25 and 100/0) were characterized (moisture, asphalt content of RAP, specific gravity, water absorption, and flakiness index) for determining a better combination. The results showed that the combination (RCA/RAP) that best meets the NA aggregates specifications used for hot mix asphalt were RCA/RAP: 25/75 and 50/50. The results show the possibility of combining both wastes to obtain a coarse aggregate fraction with a high environmental benefit, by reducing the use of natural resources.

中文翻译：

---

结合再生沥青路面 (RAP) 和来自古巴的再生混凝土骨料 (RCA) 以获得粗骨料分数

在古巴，每年都会在城市建设和重建活动中产生大量的建筑和拆除垃圾（CDW）。在路面施工中使用 CDW，例如再生混凝土骨料 (RCA) 和再生沥青路面 (RAP)，是一种可行的解决方案，可以保护天然骨料 (NA) 的消耗，并最大限度地减少垃圾填埋场的影响。这项工作的主要目标是获得 5-10 毫米的 RCA 和 RAP 集料部分，以获得用于制造热拌沥青 (HMA) 的合适的再生粗集料。RCA、RAP 和 NA 的每种来源，以及 RCA/RAP 的组合（0/100、25/75、50/50、75/25 和 100/0）都被表征（水分、RAP 的沥青含量、比重、水吸收率和片状指数）以确定更好的组合。结果表明，最符合用于热拌沥青的 NA 骨料规格的组合 (RCA/RAP) 是 RCA/RAP：25/75 和 50/50。结果表明，通过减少自然资源的使用，将两种废物结合以获得具有高环境效益的粗骨料部分的可能性。