Capasso Ilaria, D'Angelo Gigliola, Del Río Merino Mercedes, Campanile Assunta, Caputo Domenico, Liguori Barbara
Department of Engineering and Geology, University of Chieti-Pescara "G d'Annunzio", Viale Pindaro 42, 65122 Pescara, Italy.
DICEA-Department of Civil, Building and Environmental Engineering, University of Naples Federico II, P.le Tecchio 80, 80126 Naples, Italy.
Polymers (Basel). 2025 Feb 21;17(5):570. doi: 10.3390/polym17050570.
Geopolymer technology is considered a strategic alternative for recycling construction and demolition waste (CDW) and to produce new construction products which meet the requirements of environmental and energy sustainability. The separation and management of CDW fractions is still a technological complex process and, even if large-scale separation technology is quite common, the necessity to perform this treatment may reduce the environmental and economic benefits of CDW reuse. So, a very promising option is represented by the manufacturing of geopolymers using unseparated CDW. In this aim, waste deriving from cement-based mortars, bricks and natural stones have been selected and widely characterized from a mineralogical, chemical and morphological point of view. Then, geopolymer mortars were produced using several amounts of either a single fraction or a mixture of the selected waste. The chemical, physical, mechanical, and microstructural characterization of the geopolymer-produced mortars was carried out to assess how the combination and different quantities of the mixed CDW affected the final properties. In particular, geopolymeric mortars produced from the unselected CDW showed higher mechanical properties, despite the lower apparent density, when compared to geopolymeric mortars produced from single fractions of CDW. The improvement of mechanical features seems to be not affected by the waste amount used, providing encouraging findings to promote the actual use of unseparated CDW with the resulting enhancement of environmental and economic benefits.
地质聚合物技术被认为是回收建筑和拆除废物（CDW）以及生产符合环境和能源可持续性要求的新型建筑产品的一种战略选择。CDW组分的分离和管理仍然是一个技术复杂的过程，即使大规模分离技术相当普遍，但进行这种处理的必要性可能会降低CDW再利用的环境和经济效益。因此，使用未分离的CDW制造地质聚合物是一个非常有前景的选择。为此，从矿物学、化学和形态学角度对源自水泥基砂浆、砖块和天然石材的废物进行了选择和广泛表征。然后，使用选定废物的单一组分或混合物的几种用量制备了地质聚合物砂浆。对所制备的地质聚合物砂浆进行了化学、物理、机械和微观结构表征，以评估混合CDW的组合和不同用量如何影响最终性能。特别是，与由CDW单一组分制备的地质聚合物砂浆相比，由未筛选的CDW制备的地质聚合物砂浆尽管表观密度较低，但显示出更高的机械性能。机械性能的改善似乎不受所用废物量的影响，这为促进未分离CDW的实际使用以及由此提高环境和经济效益提供了令人鼓舞的结果。
