Maddalena Riccardo
School of Engineering, Cardiff University, Cardiff CF24 3AA, UK.
Materials (Basel). 2023 Feb 3;16(3):1301. doi: 10.3390/ma16031301.
There is a growing concern for finding alternative solutions to construction materials in order to minimise their environmental impact as well as enhancing their service life. This study investigated the durability of cementitious mortars prepared by replacing fine aggregate (sand) with recycled tyre shreds and crumbs, aiming at providing an alternative outlet to tyre waste disposal. Tyre shreds obtained at different particle sizes, from fibres of 0.5-5.0 mm to crumbs of 0.1-0.85 mm in diameter, were used as fine aggregate replacement at 20% by volume. The strength of the mortar samples, their thermal conductivity and their water absorption rate were tested at the age of 28 days and after 20 freeze/thaw cycles. The results showed that the mortar containing tyre crumbs at lower particle sizes resulted in negligible shrinkage, improved freeze/thaw resistance, a reduced water absorption by up to 52% and an improved thermal resistivity.
人们越来越关注寻找建筑材料的替代解决方案，以尽量减少其对环境的影响并延长其使用寿命。本研究调查了用回收轮胎碎片和碎屑替代细集料（沙子）制备的水泥砂浆的耐久性，旨在为轮胎废物处理提供一个替代出路。不同粒径的轮胎碎片，从0.5 - 5.0毫米的纤维到直径0.1 - 0.85毫米的碎屑，被用作细集料替代品，替代量为体积的20%。在28天龄期和20次冻融循环后，测试了砂浆样品的强度、热导率和吸水率。结果表明，含有较小粒径轮胎碎屑的砂浆收缩可忽略不计，抗冻融性提高，吸水率降低高达52%，热阻提高。
