Naseri Amirhossein, Ghasemi Omid, Fattahi Seyed Mohammad, Najafipour Parsa, Fahimifar Ahmad
Garmsar Campus, Amirkabir University of Technology, Tehran, Iran.
Civil and Environmental Engineering Faculty, Amirkabir University of Technology, Tehran, Iran.
Sci Rep. 2025 Jan 6;15(1):979. doi: 10.1038/s41598-024-84722-4.
This investigation addresses the reinforcement of rammed earth (RE) structures by integrating carpet polyacrylic yarn waste (CPYW) generated from the carpet production process and employing Ground Granulated Blast-Furnace Slag (GGBS) as a stabilizer, in conjunction with alkali activators potassium hydroxide (KOH), to enhance their mechanical properties. The study included conducting Unconfined Compressive Strength (UCS) tests and Brazilian Tensile Strength (BTS) tests on plain samples, GGBS-stabilized (SS) samples, CPYW-reinforced (CFS) samples, and samples reinforced with a combination of GGBS and CPYW (SCFS). The results showed that the mechanical and resistance properties of the CFS and SCFS samples were improved; these findings were confirmed by the presence of more cohesive GGBS gel and fibers as seen in FE-SEM and microscopic images. Therefore, the use of GGBS and CPYW, both separately and in combination, is suggested as a viable approach to enhance mechanical performance and reduce the brittle failure propensity of RE structures. This study achieved significant improvements in the mechanical behavior of RE structures by integrating CPYW and alkali-activated GGBS. Results showed a 370% improvement in UCS and a 638% increase in BTS than the plain sample. These enhancements demonstrate the potential for using industrial waste in eco-friendly, high-performance construction materials.
本研究通过整合地毯生产过程中产生的地毯聚丙烯腈纱废料（CPYW），并使用粒化高炉矿渣（GGBS）作为稳定剂，结合碱激活剂氢氧化钾（KOH），来增强夯实土（RE）结构，以提高其力学性能。该研究包括对素土样本、GGBS稳定化（SS）样本、CPYW增强（CFS）样本以及GGBS和CPYW组合增强（SCFS）样本进行无侧限抗压强度（UCS）试验和巴西抗拉强度（BTS）试验。结果表明，CFS和SCFS样本的力学性能和抗力性能得到了改善；在FE-SEM和微观图像中看到的更多粘性GGBS凝胶和纤维证实了这些发现。因此，建议单独或组合使用GGBS和CPYW，作为提高RE结构力学性能和降低其脆性破坏倾向的可行方法。本研究通过整合CPYW和碱激活GGBS，在RE结构的力学性能方面取得了显著改善。结果表明，与素土样本相比，UCS提高了370%，BTS提高了638%。这些增强表明了在环保型高性能建筑材料中使用工业废料的潜力。
