Due to the large amount of CO₂ emissions produced nowadays by the construction sector, the scientific community is looking for measures that will bring constructions to the be as environmental-friendly as possible. One of the most popular lines of research is the use of construction waste as recycled aggregates for the production of recycled aggregates concrete. Regarding the use of coarse recycled aggregates, there are a large number of studies that validate their use at both a mechanical and durability levels. Regarding the use of fine particles, which are inherent to the existence of coarse particles, it is necessary to increase the existing knowledge before they can be widely used. In this paper, the authors have sought to isolate the weakest part of those concrete mixes with exclusively recycled aggregate, i.e. a mortar made exclusively with fine recycled aggregates, in order to analyse the effect of drying-wetting cycles on mixes with recycled aggregates only. Specifically, three types of fine aggregates were used, one natural silica aggregate, one aggregate from crushed ballast and one from crushed sleepers. The mortars made with these aggregates were subjected to 50 durability cycles in distilled water, seawater and water with sulphates. Mechanical, visual and microstructural tests were carried out to analyse the effect of each of these environments on each of the mortars.

由于大量的 CO ₂当今建筑部门产生的排放物，科学界正在寻找措施，使建筑尽可能环保。最受欢迎的研究方向之一是使用建筑垃圾作为再生骨料来生产再生骨料混凝土。关于使用粗再生骨料，有大量研究验证了它们在机械和耐久性水平上的使用。关于细颗粒的使用，这是粗颗粒存在所固有的，需要增加现有的知识才能广泛使用。在本文中，作者试图将这些混凝土混合物中最薄弱的部分与完全回收的骨料隔离开来，即完全由细再生骨料制成的砂浆，为了分析干湿循环对仅含有再生骨料的混合物的影响。具体而言，使用了三种类型的细骨料，一种天然二氧化硅骨料，一种来自碎道碴的骨料，一种来自碎枕木。用这些骨料制成的砂浆在蒸馏水、海水和含硫酸盐的水中经受了 50 次耐久性循环。进行了机械、视觉和微观结构测试，以分析每种环境对每种砂浆的影响。海水和含有硫酸盐的水。进行了机械、视觉和微观结构测试，以分析每种环境对每种砂浆的影响。海水和含有硫酸盐的水。进行了机械、视觉和微观结构测试，以分析每种环境对每种砂浆的影响。